Simulation system for heat and power facilities

Abstract

To provide an electrothermal facility simulation system that enables a rationally integrated utilization of a photovoltaic power generation instrument, and a power storage instrument and other electrothermal instrument.SOLUTION: A process condition setting unit 22 is configured to set process conditions such as horizontal surface solar radiation of a photovoltaic power generation instrument and the like. An operation condition setting unit 40 further has a power storage condition setting unit 41 and a photovoltaic power generation output condition setting unit 42. A computation unit 7p is configured to: perform a convergence calculation of repeating a change and adjustment of a load factor of an electrothermal instrument until a manufacturing amount of any of compound total energy converges on a target value accompanied by an output variation of the photovoltaic power generation instrument and charge / discharge condition of a power storage instrument in continuous control; obtain a situation in which a total amount of charge per day of the power storage instrument and a total amount of discharge per day of the power storage instrument are equal, and an amount of charge and amount of discharge of the power storage instrument allowing for keeping balance of power energy by a time zone; and calculate an amount of utility consumption on the basis of an added amount of use of the power energy.SELECTED DRAWING: Figure 2c

Description

[Technical Field]

[0001] The present invention relates to a simulation system and a method for operating a heat and power supply facility, and more particularly to a heat and power supply facility simulation system and a method for operating a heat and power supply facility that determines the relationship between the operating conditions of the heat and power supply equipment and the amount of supplied energy used or the amount of produced combined total energy in a heat and power supply facility that has a plurality of heat and power supply equipment connected, is supplied with at least electric power and fuel (hereinafter referred to as "supply energy"), and produces at least two of electric power, low-temperature chilled water, chilled water, hot water, hot water, high-pressure steam, and low-pressure steam (hereinafter referred to as "composite total energy") and supplies the produced combined total energy to utilization facilities. [Background technology]

[0002] The following Patent Document 1 is known regarding a simulation system and operation method for a heat and power supply facility as described above. According to this document, an accurate simulation is performed by changing the load factor of the heat and power supply device so that the production amount of any one of the combined total energy converges to the target value set by the energy load setting unit, adjusting the balance of at least the combined total energy related to the heat and power supply device based on the changed load factor, and repeating the change and adjustment of the load factor of the heat and power supply device until the production amount converges to the target value. This heat and power supply device includes photovoltaic power generation equipment, solar thermal collectors, etc., and it is possible to rationally integrate and use photovoltaic-related equipment with other heat and power supply equipment.

[0003] On the other hand, in recent years, the performance of photovoltaic power generation equipment and power storage equipment has improved dramatically, and the combined use of these equipment has also increased. Accordingly, there is a demand for a system that can accurately simulate heat and power facilities that include photovoltaic power generation equipment and power storage equipment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6118973 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above-described conventional situation, an object of the present invention is to provide a simulation system for a heat and power supply facility that is capable of rationally integrating and utilizing a photovoltaic power generation device, a power storage device, and other heat and power supply devices. [Means for solving the problem]

[0006] In order to achieve the above object, the heat and power supply facility simulation system according to the present invention is characterized in that a plurality of heat and power supply devices are connected, at least electric power and fuel (hereinafter referred to as "supplied energy") are supplied, and at least two of electric power, low-temperature chilled water, chilled water, hot water, hot water, high-pressure steam, and low-pressure steam (hereinafter referred to as "composite total energy").a heat and power generation facility that generates and supplies heat and power to utilization facilities, the heat and power generation facility including at least a photovoltaic power generation device, an electricity storage device, and a heat and power generation device having at least a pump using a motor, and does not include power generation devices other than the electricity storage device; an energy load setting unit that sets an amount of composite total energy required by the utilization facility for each time period on a daily basis; a process condition setting unit that sets process conditions including at least either an outside air temperature or a wet-bulb temperature of the heat and power generation facility and the amount of solar radiation on a horizontal surface of the photovoltaic power generation device; an operating condition setting unit that sets whether or not to operate and an operating priority for each of the heat and power generation devices for each time period; and a calculation unit that calculates at least the amount of composite total energy produced as a result of operating the heat and power generation facility in accordance with the operating conditions of the operating condition setting unit; and a photovoltaic power generation output condition setting unit that sets output control to continuous control, wherein any of the thermoelectric devices excluding the photovoltaic power generation device and the power storage device includes a partial load characteristic that varies depending on the process conditions, and the photovoltaic power generation device has an output characteristic that varies depending on the amount of inclined solar radiation based on the amount of solar radiation on a horizontal surface, an outside air temperature, and a wind speed, which are among the process conditions, and the calculation unit calculates the amount of electric power usage of the thermoelectric power generation facility by changing the load factor of the thermoelectric device in accordance with the output fluctuation of the photovoltaic power generation device under the continuous control and the charge / discharge condition of the power storage device so that the amount of production of any of the composite total energy becomes the target value set by the energy load setting unit, and determines, for each time period, the charge amount and discharge amount of the power storage device that make the total daily charge amount of the power storage device equal to the total daily discharge amount of the power storage device and that can maintain the balance of electric energy, adds the determined charge amount to the amount of electric energy usage for each time period, and makes up for any shortage in the determined amount of electric energy usage with purchased electric power, thereby simulating the electric load.

[0007] According to the above configuration, the thermoelectric devices include at least a photovoltaic power generation device, a power storage device, and a thermoelectric device equipped with at least a pump using a motor. Furthermore, any of the thermoelectric devices, excluding the photovoltaic power generation device and the power storage device, has a partial load characteristic that varies depending on process conditions, and the photovoltaic power generation device has an output characteristic that varies depending on the process conditions, such as the amount of solar radiation on an inclined surface based on the amount of solar radiation on a horizontal surface, and the outdoor air temperature. Furthermore, the amount of charge and discharge of the power storage device varies depending on its configuration and charge / discharge conditions. Furthermore, conventional photovoltaic power generation devices could only control output in units of the number of photovoltaic power generation modules (arrays), resulting in stepwise output control and requiring considerable purchase of electricity for adjustment. However, technological advances have made it possible for photovoltaic power generation devices, including power conditioners, to control rated output in 1% increments, enabling continuous control of photovoltaic power generation output and efficient charging of power storage devices. In the present invention, the operating condition setting unit further includes an electricity storage condition setting unit that sets the configuration of the electricity storage device and the charge / discharge conditions, and a photovoltaic power generation output condition setting unit that sets the output efficiency of the photovoltaic power generation device and sets the output control of the photovoltaic power generation device to continuous control. This makes it possible to set operating conditions and charge / discharge conditions that are in line with reality in a heat and power supply facility that includes the devices described above.

[0008] Based on the above settings, the calculation unit changes the load factor of the thermoelectric power supply device in accordance with output fluctuations of the photovoltaic power generation device and charge / discharge conditions of the power storage device under continuous control so that the production amount of any one of the combined total energy converges to the target value set by the energy load setting unit, adjusts the balance of the combined total energy related to at least the thermoelectric power supply device based on the changed load factor, and performs a convergence calculation that repeatedly changes and adjusts the load factor of the thermoelectric power supply device until the production amount converges to the target value, thereby determining, for each time period, the charge and discharge amounts of the power storage device that make the total daily charge amount of the power storage device equal to the total daily discharge amount of the power storage device and maintain the balance of electric energy.The calculation unit then determines, for each time period, the charge and discharge amounts of the power storage device that make the total daily charge amount equal to the total daily discharge amount of the power storage device and maintain the balance of electric energy.In this way, the output of the various thermoelectric power supply devices is adjusted in accordance with output fluctuations of the photovoltaic power generation device and charge / discharge conditions of the power storage device under continuous control, and electric power balance and electric storage balance are ensured. Since the discharge from the power storage device can be regarded as power generation by the power generation device, the calculated charge amount is added to the amount of electric energy used for each time period, and utility consumption is calculated based on the added amount of electric energy used. In this way, it is possible to rationally integrate and use the photovoltaic power generation device, the power storage device, and other thermoelectric devices for simulation.

[0009] The charge and discharge conditions may include at least an operation method for the power storage device, a charging schedule for the power storage device, and an upper limit value for received power. The operation method may include selecting peak cut operation, which limits the amount of purchased power so that the received power does not exceed the upper limit value. The calculation unit may determine the amount of power that exceeds the upper limit value as the discharge amount of the power storage device and calculate the charge amount for each time period excluding the time period during which the power storage device discharges based on the discharge amount. Peak cut operation is an operation method in which the purchased power of the heat and power supply equipment is kept below a certain value by discharging when the purchased power of the heat and power supply equipment exceeds a predetermined power purchase amount. Furthermore, the power storage device cannot be charged and discharged simultaneously. Therefore, by determining the amount of power that exceeds the upper limit value as the discharge amount of the power storage device and calculating the charge amount for each time period excluding the time period during which the power storage device discharges based on the discharge amount, the heat and power supply equipment can be simulated even in peak cut operation.

[0010] In such a case, the charging schedule may include a charging start time of the power storage device and a maximum possible charging amount per time slot, and the calculation unit may determine a charging end time of the power storage device based on the total daily discharge amount and the maximum possible charging amount, and may calculate a final charging amount for the time slot including the charging end time. In the above-mentioned peak shaving operation, by setting a charging start time of the power storage device and a maximum possible charging amount per time slot as a charging schedule, and determining the charging end time and the final charging amount based on the total daily discharge amount and the maximum possible charging amount, it is possible to simulate a heat and power supply facility even when setting such a charging schedule.

[0011] Preferably, the charging schedule includes a charging start time and a charging end time of the power storage device, and a charge amount for each time slot between these times, and the calculation unit determines the charge amount for the charging end time of the power storage device or at least one of the time slots based on the total daily discharge amount and the charge amount for each time slot. In the above-mentioned peak shaving operation, by setting the charging start time of the power storage device, the charging end time, and the charge amount for each time slot between these times as a charging schedule, and determining the charge amount for the charging end time of the power storage device or at least one of the time slots based on the total daily discharge amount and the charge amount for each time slot, it is possible to simulate a heat and power supply facility even when setting such a charging schedule.

[0012] The charging and discharging conditions may include at least an operation method of the power storage device, a discharging time period of the power storage device, a maximum possible discharge amount for each discharging time period, and a charging schedule for the power storage device. The operating condition setting unit may set the power storage device for a time period including at least the discharging time period. The operation method may include selecting scheduled discharging, in which the power storage device discharges based on the discharging time period and the discharge amount. The calculation unit may calculate the charge amount of the power storage device for each time period excluding the discharging time period based on the charging schedule. Scheduled discharging is an operation method in which discharge is performed according to a predetermined discharge schedule (discharging time period and the discharge amount for that time period). Power storage devices cannot be charged and discharged simultaneously. Therefore, by setting the power storage device for a time period including at least the discharging time period and calculating the charge amount of the power storage device for each time period excluding the discharging time period based on the charging schedule, it is possible to simulate, for example, peak-shift operation or wholesale power market price-linked operation. Peak-shift operation is an operation aimed at leveling the amount of purchased power, and is basically an operation in which power is discharged during time periods when the amount of purchased power is high and charged during time periods when the amount of purchased power is low. The operation linked to the wholesale electricity market price is an operation in which electricity is discharged during times when electricity rates are high and charged during times when electricity rates are low. With the above configuration, it is possible to simulate a heat and power generation facility even with this type of operation method.

[0014] In the above configuration, the combined total energy may be calculated in the order of steam energy before electric power energy, and other energies before the steam energy.

[0015] In any of the above characteristic configurations, the photovoltaic power generation output condition setting unit may further include a connection state selection unit that selects either AC connection or DC connection for the connection between the photovoltaic power generation device and the power storage device, and when DC connection is selected, the output efficiency of the photovoltaic power generation device may be set to 1. As shown in FIGS. 1c and 1d, the photovoltaic power generation device and the power storage device may be connected in an AC connection in which photovoltaic power generation power is converted into alternating current (AC) and connected to the power storage device via an AC bus of a heat and power supply facility, or in a DC connection in which photovoltaic power generation power is directly connected to the power storage device as direct current (DC). While AC connection causes conversion loss, DC connection does not. Therefore, with the above configuration, simulations are possible regardless of which connection method is selected, and these connections can also be compared.

[0016] In any of the above characteristic configurations, the power storage condition setting unit can set the configuration of the power storage devices by dividing them into two series, and the calculation unit can regard the two series of power storage devices, in which charge / discharge amounts are distributed so that the state of charge (SOC) of the power storage devices in each series, as one power storage device.In a heat and power supply facility, the number of power storage devices may not be limited to one series (one type), but may also be increased by one series, for example, by expansion.With the above configuration, it is possible to simulate even a heat and power supply facility having two series of power storage devices.

[0017] Furthermore, in the above configuration, if the conversion efficiencies of the DC-AC converters connected to the power storage devices of each series are different, the calculation unit may calculate the overall efficiency of the two series of power storage devices as a whole during charging and discharging, and use the calculated overall efficiencies during charging and discharging to treat the two series of power storage devices as a single power storage device.When two series of power storage devices are installed, the conversion efficiencies of the DC-AC converters of the power storage devices do not necessarily match.With the above configuration, it is possible to simulate a heat and power supply facility with two series of power storage devices even if the conversion efficiencies of the DC-AC converters of the power storage devices do not match. [Effects of the Invention]

[0018] The features of the heat and power supply facility simulation system according to the present invention make it possible to rationally integrate and use photovoltaic power generation equipment and power storage equipment with other heat and power supply equipment. Furthermore, simulations of photovoltaic power generation equipment and power storage equipment have become more accurate, making it possible to evaluate the introduction of these equipment, evaluate their installation in advance, and simulate efficient installation.

[0019] Other objects, configurations and effects of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention. [Brief explanation of the drawings]

[0020] [Figure 1a] 1 is a general system diagram of a heat and power supply facility that is a target of a simulation system according to the present invention. [Figure 1b] FIG. 1 is a block diagram of an example of a heat and power supply facility. [Figure 1c] 1 is a schematic diagram showing the configuration of an electric power storage device and the flow of electric power in a heat and power supply facility in which a photovoltaic power generation device is AC-coupled to an electric power storage device. [Figure 1d] 1 is a schematic diagram showing the configuration of an electric storage device and the flow of power in a thermoelectric power supply facility in which a photovoltaic power generation device is DC-connected to an electric storage device; [Figure 2a] FIG. 2 is a business data flow diagram of the simulation system according to the present invention. [Figure 2b] FIG. 1 is a diagram illustrating the hardware configuration of a simulation system according to the present invention. [Figure 2c] FIG. 2 is a diagram illustrating the software configuration of the simulation system according to the present invention. [Figure 3a] FIG. 4 is a flowchart showing the setting procedures of each setting unit. [Figure 3b] FIG. 4 is a flowchart showing a setting procedure in an operating condition setting unit. [Figure 4] FIG. 4 is a diagram illustrating an example of heat and power load data. [Figure 5a]10 is a graph showing partial load characteristics of power generation efficiency, steam yield, and waste hot water yield of equipment performance data of gas engine cogeneration. [Figure 5b] 1 is a graph showing the partial load characteristics of Genelink. [Figure 6] FIG. 2 is a schematic diagram illustrating switching selection of power loads. [Figure 7] 10A and 10B are diagrams showing the setting of operating conditions for power generation equipment including power storage equipment, where (a) shows an example of setting from 8:00 to 18:00, (b) shows an example of setting from 18:00 to 22:00, and (c) shows an example of setting from 22:00 to 8:00. [Figure 8a] FIG. 1 shows the overall general logic flow. [Figure 8b] FIG. 1 is a general logic flow diagram for chilled and hot water energy balance. [Figure 8c] FIG. 1 is a general logic flow diagram for low pressure steam energy balance. [Figure 8d] FIG. 1 is a general logic flow diagram of gas engine exhaust hot water energy balance. [Figure 8e] FIG. 1 is a general logic flow diagram for hot water energy balance and power energy balance. [Figure 9a] 10 is a graph showing an example of a power balance by time period during peak cut operation. [Figure 9b] 10 is a report showing an example of a time-of-day power balance during peak-cut operation. [Figure 9c] 10 is a report showing an example of a time-zone-based charge-discharge balance of an electricity storage device during peak-cut operation. [Figure 10a] 1 is a graph showing an example of a time-of-day power balance in VPP power generation. [Figure 10b] This is a report showing an example of the time-of-day power balance for VPP power generation. [Figure 10c] This is a report showing an example of the time-of-day charge and discharge balance of energy storage equipment in VPP power generation. [Figure 11a] 10 is a graph showing an example of a power balance by time period in peak shift operation in which the power storage device is given first priority. [Figure 11b]10 is a report showing an example of a time-of-day power balance in peak shift operation in which the power storage device is given first priority. [Figure 11c] 10 is a report showing an example of a time-zone-based charge-discharge balance of an electric storage device in peak shift operation in which the electric storage device is given first priority. [Figure 11d] 10 is a graph showing an example of a power balance by time period in peak shift operation in which the gas engine is given first priority. [Figure 11e] 10 is a report showing an example of a time-of-day power balance in peak-shift operation in which the gas engine is given first priority. [Figure 11f] 10 is a report showing an example of the time-zone-based charge-discharge balance of an electric storage device during peak-shift operation in which the gas engine is given first priority. [Figure 12a] 10 is a graph showing an example of the power balance by time period in operation linked to the wholesale electricity market price with the power storage device given first priority. [Figure 12b] 10 is a report showing an example of a time-of-day power balance in operation linked to the wholesale electricity market price, with the first priority being given to power storage equipment. [Figure 12c] 10 is a report showing an example of the time-zone-based charge and discharge balance of an electric storage device in an operation linked to the wholesale electricity market price, with the electric storage device being given first priority. [Figure 13a] 1 is a graph showing an example of a power balance by time period in the case of utilizing surplus solar power generation. [Figure 13b] 10 is a report showing an example of a time-of-day power balance when utilizing surplus solar power generation. [Figure 13c] 10 is a report showing an example of the time-of-day charge and discharge balance of an energy storage device when utilizing surplus solar power generation. [Figure 14a] FIG. 10 is a diagram illustrating an example of AC connection of two series of power storage devices. [Figure 14b] FIG. 10 is a diagram illustrating an example of DC connection of two series of power storage devices. DETAILED DESCRIPTION OF THE INVENTION

[0021] Next, an embodiment of the present invention will be described with reference to FIGS. Figure 1a shows an example of a general system diagram of a heat and power supply facility that is the subject of the present invention. The heat and power supply facility M is composed of multiple heat and power supply devices. As shown in Table 1a below, the heat and power supply facility M shown in the figure is supplied with steam R (high-pressure steam R1 and low-pressure steam R2), fossil fuels and other fuels (hereinafter simply referred to as "fuel") R3, electricity R4, chilled water R5, and hot water R6, and produces steam S (high-pressure steam S1 and low-pressure steam S2), chilled water S3, S4, hot water S5, S6, hot water S7, and electricity S8, which are then supplied to utilization facilities (buildings, factories, district heating and cooling, etc.).

[0022] [Table 1a]

[0023] Thermoelectric devices are roughly classified by system into power generation system equipment M100, boiler system equipment M200, chilled water system equipment M300, hot water system equipment M400, low chilled water system equipment M500, hot water supply system equipment M600, cooling tower system equipment M700 (group cooling tower), thermal storage system equipment M800, pump system equipment M900, and solar power-related equipment M1000, and the above-mentioned thermoelectric facility is constructed by appropriately combining these. In the present invention, the power storage device (SB) M190 is included in the power generation system equipment M100. The thermoelectric devices included in each system M100 to 1000 are listed, for example, in Table 1b. Note that Table 1b is merely an example, and it is also possible to provide a low chilled water system electric turbo chiller or a low chilled water electric heat pump as the low chilled water system equipment so that low chilled water is supplied. Genelink (registered trademark) is a waste hot water injection type absorption chiller that effectively utilizes waste hot water below 100°C generated from gas cogeneration (gas engine, fuel cell) to perform cooling. Solar-related equipment M1000 includes solar power generation equipment M1100 that supplies electricity R4 to other thermoelectric equipment and solar thermal collector equipment M1200 that supplies solar hot water R7 to solar hot water utilization equipment as other thermoelectric equipment. Solar hot water utilization equipment that receives the supply of solar hot water R7 includes Solar Genelink (solar hot water injection type absorption chiller) and / or solar hot water heat exchanger. In this specification, heat source equipment refers to thermoelectric equipment excluding power generation equipment including power storage equipment and solar power generation equipment. Each equipment is identified by the energy it receives and the energy it produces and supplies, and is classified by system as described above.

[0024] [Table 1b]

[0025] Here, the simulation system 1 is configured as shown in Fig. 2a, with a plurality of user terminals 2 and an administrator terminal 3 connected to a DB server 4 via a network 5. The hardware configuration of the user terminals 2, administrator terminal 3, etc. is configured as shown in Fig. 2b and Table 1c. The hardware of each terminal roughly comprises a user interface 6, a CPU 7, etc., and runs data and programs 7x to 7z to perform processing.

[0026] [Table 1c]

[0027] The user interface 6 includes a monitor 6a, a keyboard 6b, and a mouse 6c, and is used by the user to operate buttons and input fields on the display screen, which will be described later. The user interface 6 is connected to a CPU 7, a temporary storage memory 7b, a HDD 7c, a network adapter 7d, etc. via a bus 7a, which includes a data bus and an address bus. The CPU 7, temporary storage memory 7b, HDD 7c, etc. cooperate to form a calculation unit 7p, which runs the above data, application programs, etc.

[0028] As shown in FIG. 2a, the database group 100 of the DB server 4 (hereinafter, "database" will be abbreviated as "DB") includes an electricity price etc. DB 101, an environmental load DB 102, and an equipment performance DB 103. The electricity price etc. DB 101 stores and preserves information on the price of supplied energy, such as electricity rates. The environmental load DB 102 stores environmental load data (unit environmental load) created from various publicly available data. The equipment performance DB 103 stores information such as partial load characteristics of equipment, changes in equipment efficiency due to outside air temperature and wet-bulb temperature, internal power consumption, and constraints on equipment incorporated into the system, categorized by model, fuel, and capacity of major manufacturers.

[0029] Users of this system access the DB server 4 via a network 5 such as TCP / IP, read the electricity rate data file 101a, the environmental load data file 102a, and the manufacturer / device data template file 103a from each of the DBs 101 to 103, and save them as read data 100a. By reading these, users can use data not listed in the catalog, data on updated devices, data on new models, etc.

[0030] The electricity rate data and environmental load data can also be manually changed to each user's own evaluation data to perform a simulation, and the data is saved in the case file 106. In this way, the conditions and parameters set in each setting unit, which will be described later, can be recorded as a case file on the HDD 7c, which is an electronic recording medium. Note that the electronic recording medium is not limited to the HDD 7c, and various removable disks such as magnetic disks, optical disks, RAM, etc. can also be used as the electronic recording medium.

[0031] The calculation unit 7p runs a processing application 7y and a load creation application 7z. The load creation application 7z creates a thermoelectric load according to the situation and saves it in a thermoelectric load file 104. The user can then run these applications and modify the simulation data to suit the energy system being evaluated, and save it as a case file 106 and a thermoelectric load file 104. For evaluation purposes, output can be generated as an output graph, report display 155, simple printout 156, or file (table format) 157. The user can load the case file 106 at any time to evaluate energy-saving effects, etc. Furthermore, any of the thermoelectric devices in the energy system, excluding the solar power generation device and the power storage device, includes a partial load characteristic, and the solar power generation device has output characteristics that fluctuate depending on the amount of solar radiation on the slope and the outside air temperature, as described below. The calculation unit 7p performs a convergence calculation by changing the load factor of the thermoelectric device in question so that the amount of production of any of the composite total energy reaches the target value set in the energy load setting unit, based on the output characteristics of the solar power generation device and the charge / discharge conditions of the power storage device under continuous control. The calculation unit 7p also includes a calculation determination unit 7q that determines the number of heat and power supply devices and changes the number so that the convergence calculation is completed.

[0032] For example, if an excessive number of units or an inappropriate type of heat and power supply equipment is selected in the operating condition setting unit 40, it is possible that the convergence calculation will not converge to the target value. In such a case, the heat source equipment starts up only the number of units that corresponds to the heat load according to the set priority, and the calculation unit 7p performs the convergence calculation again using that number of units. Power generation equipment can be processed by purchasing electricity, and is configured not to perform automatic start-up in order to reduce the load of the convergence calculation.

[0033] On the other hand, if the capacity of the set heat and power supply equipment is low or the number of equipment is small, and it is determined that the calculation result does not reach the target value (e.g., the target chilled water load) and the convergence calculation cannot be completed, the calculation determination unit 7q adds one heat source equipment with the lowest set priority and performs the convergence calculation again. This is repeated until the convergence calculation can be completed, and the number of equipment is increased to a level commensurate with the load. Here, the heat source equipment with the lowest priority is usually of low importance in the system configuration of the heat and power supply equipment and is considered to have little impact on the entire heat and power supply equipment. Furthermore, since it is only necessary to increase the number of heat source equipment with the lowest priority, recalculation can be performed easily. This allows for a quick simulation without significantly affecting the entire heat and power supply equipment.

[0034] Figure 1b shows an example of a block flow of heat and power generation equipment M. This heat and power generation equipment M is composed of a gas engine cogeneration unit M150 (hereinafter also referred to as "GE cogeneration," "gas engine cogeneration," or "gas engine"), a low-pressure boiler M220, an absorption chiller M310, a turbo chiller M350, a Genelink M380, a solar power generation unit M1100, and an electricity storage unit M190. The gas engine cogeneration unit M150 is equipped with a waste heat boiler M150a.

[0035] The photovoltaic power generation equipment M1100 (photovoltaic power generation unit) includes a photovoltaic power generation module (array) and a power conditioner M1101 or a DC-DC converter M1102. The photovoltaic power generation equipment M1100 can be either AC-connected (as shown in Figure 1c) and connected to the AC bus Ab, or DC-connected (as shown in Figure 1d) and connected to the energy storage device M190 as a direct current (DC). In the AC-connected case, solar power is supplied (charged) to the energy storage device M190 via the power conditioner M1101 and the AC bus Ab. This conversion loss occurs due to the DC-to-AC-to-DC conversion. On the other hand, in the DC-to-DC connected case, solar power is supplied (charged) directly to the energy storage device M190 via the DC-to-DC converter M1102, with a portion (surplus) being supplied to the AC bus Ab. This reduces conversion loss. In the present invention, by setting a connection state selection unit 42a (described later), it is possible to switch between AC connection and DC connection for simulation and comparison.

[0036] As shown in Fig. 2c, the software configuration of the simulation system 1 according to the present invention is roughly composed of an energy load setting unit 10, a basic condition setting unit 20, a system configuration setting unit 30, an operating condition setting unit 40, an operating result output unit 50, a case file etc. creation unit 60, and a display control unit 70. The DB group 100 is the same as that shown in Fig. 2a.

[0037] The basic condition setting unit 20 includes a utility cost setting unit 21, a process condition setting unit 22, an environmental load setting unit 23, and a temperature data setting unit 24. The utility cost setting unit 21 includes an electric power cost setting unit 21a and a fuel cost setting unit 21b. The operating condition setting unit 40 includes an electric power storage condition setting unit 41 that sets the configuration and charge / discharge conditions of the power storage device M190, a photovoltaic power generation output condition setting unit 42 that sets the output efficiency of the photovoltaic power generation device M1100 and sets the output control of the photovoltaic power generation device M1100 to continuous control, and a power selling condition setting unit 43 that sets the amount of power sold to be supplied from the heat and power generation facility to the outside and the time period during which the power is sold. The photovoltaic power generation output condition setting unit 42 further includes a connection state selection unit 42a that selects either AC connection or DC connection for the connection between the photovoltaic power generation device M1100 and the power storage device M190.

[0038] Here, Fig. 3a shows the setting procedure for each setting section of the simulation system. As shown in FIGS. 2c and 3a, this setting procedure begins with the energy load setting unit 10 setting an energy load (S201). Next, the process condition setting unit 22 sets the heat transfer medium process conditions (S202). Then, the environmental load setting unit 23 and the utility cost setting unit 21 set environmental load data and utility costs by reading them from the environmental load DB 102 and the electricity rate DB 101 (S203, 204). After these settings are made, the system construction setting unit 30 selects a heat and power supply device and reads its performance data to construct a heat and power supply facility (S206, 207). The operating conditions for the constructed heat and power supply facility are set by the operating condition setting unit 40 (S208). The construction status of the heat and power supply facility is displayed on a flow chart via the display control unit 70 as appropriate. The conditions set in each of the above steps can be appropriately saved by the case file creation unit 60 as individual data 100b, such as a user device template file 103b, a heat and power load file 104, and a case file 106. Furthermore, in each step above, various data in the DB group 100 is used for setting, but it is also possible to use the stored individual data 100b to perform various settings.

[0039] Here, when the heat and power supply facility M includes an electric power storage device M190 as shown in FIG. 1b, the setting by the operating condition setting unit 40 (S208) is as shown in FIG. 3b. The electric power storage condition setting unit 41 sets the operating conditions for the electric power storage device M190 (S2081), and sets the operating conditions for the other heat and power supply devices (S2082). The calculation unit 7p then performs an initial simulation calculation (S2083). The calculation unit 7p then calculates the charge and discharge amounts of the electric power storage device M190 for each time period to calculate the charge and discharge balance (S2084), and adds the calculated charge amount to the electric power energy usage (electric power load) for each time period (S2085). Then, the calculation unit 7p calculates and outputs utility consumption based on the added electric power energy usage (electric power load) (S210). The utility consumption refers to the consumption of supply energy required to produce the combined total energy. The supplied energy includes electricity, fuel, and received heat (steam, cold water, hot water, and waste hot water).

[0040] On the other hand, if it becomes necessary to achieve an energy balance (S2086), the calculation unit 7p executes a time-of-day and / or annual simulation based on these new set conditions and the added amount of power energy usage (S209). The results are output by the operation result output unit 50 in the form of a graph or report such as that shown in FIG. 9 (S210). It is also possible to change the conditions and perform repeated simulations. In such cases, changes to the operation priority, whether operation is possible or not, the minimum power purchase amount, the power main, the heat main, etc., and changes to the operating conditions of the power storage devices (S211) are performed under the operating conditions, and addition, modification, and deletion of devices for comparison and analysis (S212) are performed under the system configuration settings. Then, the simulation is executed again and output (S209, 210).

[0041] Here, the general balance calculation processing procedure in the above simulation will be explained with reference to Fig. 8. The energy balance step will be abbreviated as "EB" hereinafter. As shown in the figure, the general processing procedure consists of chilled water EB (S01), hot water EB (S02), low-pressure steam EB (S03), high-pressure steam EB (S04), gas engine waste hot water EB (S05), hot water supply EB (S06), and electricity EB (S07). In this way, the composite total energy is calculated in the order of steam energy before electricity energy, and other energies before this steam energy, based on the set conditions at each step above.

[0042] In the energy load setting (S201), the energy load setting unit 10 sets the amount of combined energy required by the utilization equipment for each time period by month, day, and pattern. For example, as shown in Fig. 4, the outside air temperature, wet-bulb temperature, and the chilled water load, steam load, power load, chilled water supply temperature, and chilled water return temperature are set as thermoelectric load data. The outside air temperature is related to the intake air temperature of the gas turbine, and the intake air temperature is a parameter for the gas turbine power generation amount.

[0043] The wet-bulb temperature affects the cooling water temperature and is a variable in the performance (COP) of absorption chillers and turbo chillers, which is related to power consumption and fossil fuel consumption. In the equipment performance data described below, the cooling water temperature is specified as the wet-bulb temperature + an arbitrary temperature, for example, +5°C. The outside air temperature and wet-bulb temperature are set using data downloaded from the Japan Meteorological Agency website, for example. In addition to the outside air temperature and wet-bulb temperature, the temperatures of river water, seawater, sewage, well water, etc. can also be set by month and by time of day.

[0044] Furthermore, if the heat and power equipment is already in operation, heat and power load data such as chilled water load, low chilled water load, hot water load, low-pressure steam, high-pressure steam, hot water load, and power load can be set using the heat and power load data collected during operation. This energy load setting can be configured using 24-hour data for up to 31 load patterns per month for 12 months. Furthermore, loads for summer and winter design days can also be set. Here, the summer design day refers to the predicted maximum cooling load, such as a 15% increase in August load. Similarly, the winter design day refers to the predicted maximum heating load, such as a 15% increase in February load. The supply and return temperatures of chilled water, low chilled water, and hot water can also be set in a similar manner.

[0045] Next, in the process condition setting (S202), the process condition setting unit 22 sets the process conditions of the heat medium such as the basic conditions, fuel data, the electric system, the steam system, and the type of recovered steam from the gas engine, gas turbine, fuel cell, etc. This process condition setting unit 22 selects whether to use the temperature difference of the heat medium, the outside air temperature, and the wet bulb temperature of the energy load setting unit 10, and sets the target temperature difference between the supply temperature and the return temperature of the cold water, hot water, and low cold water, and the minimum bypass flow rate.

[0046] Next, in process condition setting (S202), the process condition setting unit 22 sets the process conditions of the heat medium, such as basic conditions, fuel data, the electric system, the steam system, and the type of recovered steam from a gas engine, gas turbine, fuel cell, etc. This process condition setting unit 22 selects whether to use the heat medium temperature difference, outside air temperature, and wet-bulb temperature from the energy load setting unit 10, and sets the target temperature difference between the supply temperature and return temperature of chilled water, hot water, and low-chilled water, as well as the minimum bypass flow rate. It also sets the high-pressure and low-pressure steam conditions (pressure MPaG, steam enthalpy kJ / kg, return water enthalpy kJ / kg, steam recovery rate %).

[0047] Here, in the calculation process for steam enthalpy, first the steam pressure is set, and when either saturated steam or superheated steam is selected as the steam type, it is determined whether the steam pressure is superheated steam or saturated steam. If the steam is saturated, the saturated steam enthalpy is calculated based on the set pressure, and the calculation result is input as the steam enthalpy. On the other hand, if the steam is superheated, the superheated steam enthalpy is calculated when the superheated steam temperature is input, and the calculation result is input as the steam enthalpy. Note that the high-pressure steam and low-pressure steam pressures can be set separately, and the calculation procedure is the same for both.

[0048] The fuel process conditions include setting the calorific value and specific gravity of gas, heavy oil, kerosene, other oils, and hydrogen. For the electric and steam systems, the following are set: the power load of the heat and power load data, the breakdown of the low-pressure steam load, the supply destination of the generated power, the type of recovered steam (gas engine, gas turbine, fuel cell, etc.), and the power recovery by steam decompression.

[0049] The breakdown of the power load in the heat and power load data is selected based on whether the power load set by the energy load setting unit 10 is a power load supplied to a facility other than the heat and power supply facility, or a power load including the power of the heat and power supply facility. By setting the load other than the heat and power supply facility, the power load set by the energy load setting unit 10 is set as power supplied to the utilization facility.

[0050] Similarly, for the breakdown of low-pressure steam load in the heat and power load data, select whether the low-pressure steam load is a steam load supplied to facilities other than the heat and power equipment, or a steam load generated by the heat and power equipment. If only supply is made to facilities other than the heat and power equipment, the set steam load is the steam supplied to the utilization facility. Furthermore, if the total steam load (steam load from the steam generator) is selected, this is the case when steam is supplied to the utilization facility and used in the heat and power equipment, and is set as the total flow rate generated from the steam generating equipment. The above-mentioned power load and steam load are used in the simulation, and the results are output to reports, etc.

[0051] In addition, power recovery by steam pressure reduction is set for power recovery equipment that can recover power when excess high-pressure steam is reduced to low-pressure steam. In such cases, the amount of high-pressure steam and the enthalpy of exhaust steam required for maximum power generation and partial load power generation are set.

[0052] For each recovered steam type, select whether the steam generated from the power generation equipment (gas engine, gas turbine, and fuel cell) will be low-pressure steam or high-pressure steam. For example, if "low-pressure steam" is selected, the steam supply destination from the waste heat boiler M150a of the gas engine M150 is specified to be supplied to the low-pressure steam side.

[0053] Furthermore, the process condition setting unit 22 sets horizontal solar radiation as a process condition for the solar-related equipment. The horizontal solar radiation data includes common data, such as the latitude, longitude, altitude, and number of consecutive days since New Year's Day, where the equipment is installed, as well as hourly data on the data time, temperature, horizontal global solar radiation, the direct component of horizontal global solar radiation, the sky-scattered component of horizontal global solar radiation, and wind speed. Furthermore, in cold regions, snow accumulation data may also be included. The hourly data uses solar radiation data downloaded from a solar radiation database published by a public institution, for example. The tilt angle (e.g., horizontal is 0 degrees) and orientation (e.g., due south is 0 degrees, west is positive, and -90 to 90 degrees) of the photovoltaic power generation module (or solar thermal collector body) are also set. Since the orientation and tilt angle can be set arbitrarily, simulations can be easily performed using the orientation and tilt angle as parameters. For example, the optimal orientation and tilt angle can be determined for a single location.

[0054] Then, based on the horizontal solar radiation data, tilt angle, and azimuth, the direct solar radiation component, the sky-scattered component of the solar radiation on the slope, and the ground-reflected component of the solar radiation on the slope are calculated, and the solar radiation on the slope is calculated by adding these up. Details of the calculation are as described in Japanese Patent No. 6118973 by the applicant of the present application.

[0055] To determine where the electricity generated by the power generation equipment will be supplied and used, the destination of the generated electricity can be set by selecting either sharing the power of both the heat and power supply equipment and the power usage equipment, sharing the power of only the heat and power supply equipment, or sharing the power of only the power usage equipment. For example, if "sharing the power of both the heat and power supply equipment and the consumer (power usage equipment)" is selected, power will be supplied to both the power usage equipment and the heat and power supply equipment. The system is set to generate electricity for the total power, and any shortfall will be purchased.

[0056] If you select "Supply to heat and power facilities" as the power supply destination, the power is balanced so that power generation equipment generates power according to the amount of power consumed by the heat and power facilities. Similarly, if you select "Consumers only," the power is balanced so that power generation equipment generates power according to the amount of power other than that of heat sources. In other words, the amount of power generated by power generation equipment changes depending on the destination to which the generated power is supplied.

[0057] As shown in FIG. 6, assuming that the amount of power consumed by the heat and power supply equipment M is CE1, the amount of power consumed by the utilization equipment F is CE2, and the amount of power generated by the power generation equipment M100 and the solar power generation equipment M1100 is GEa (GEa1-3), when power is consumed only by the heat and power supply equipment M (for example, supplying to the turbo chiller M350), a convergence calculation is performed to prevent reverse power supply if GEa1>CE1. When power is consumed by both the heat and power supply equipment M and the utilization equipment F, a convergence calculation is performed to prevent reverse power supply if GEa2>CE1+CE2. When power is consumed only by the utilization equipment F, a convergence calculation is performed to prevent reverse power supply if GEa3>CE2. In other words, the amount of power to be converged will differ. The same applies to steam.

[0058] In this way, for the power load, energy evaluation can be performed by switching between the power load used only in the utilization equipment and the power generation equipment, and for the steam load, energy evaluation can be performed by switching between the power load used only in the utilization equipment and the power generation equipment.

[0059] 1b, when the heat and power supply facility M includes an electric power storage device M190, the electric power storage device M190 receives electric power from an AC bus Ab (AC connection) of the heat and power supply facility M or a photovoltaic power generation device M1100 (DC connection) and stores the power. That is, the amount of electric power CE1 consumed by the heat and power supply device M includes the amount of charge stored by the electric power storage device M190. Therefore, the amount of electric power CE1 consumed by the heat and power supply device M changes depending on the configuration and charge / discharge conditions of the electric power storage device M190, and the amount of electric power to be converged also differs depending on the electric power storage device M190.

[0060] Furthermore, for heat and power equipment M in Figure 1b, the basic conditions are the target temperature difference of the chilled water, the low-pressure steam pressure, and its enthalpy. The fuel data is the gas lower heating value and specific gravity. The conditions for the electrical and steam systems are set so that the breakdown of the power load is set to only loads other than the heat and power equipment (utilization equipment), and the breakdown of the steam load is set to use in equipment other than the heat and power equipment (utilization equipment). The type of recovered steam from gas engines, etc. is set to low-pressure steam.

[0061] In the environmental load data setting (S203), the environmental load data setting unit 23 sets environmental load data. Specifically, the data is set to output the environmental load (primary energy, CO2, NOx, SOx) by multiplying the electricity consumption (amount used) and the fossil fuel and other fuel consumption amounts calculated under the conditions set by the energy load setting unit 10, basic condition setting unit 20, system configuration setting unit 30, and operating condition setting unit 40 by environmental load data (unit environmental load). The data to be set are the emission intensity and crude oil equivalent values ​​of CO2, NOx, and SOx for electricity, gas, kerosene, heavy oil, other oils, and hydrogen. For electricity, a primary energy equivalent value is also set. Furthermore, electricity can be set by time period, such as daytime and nighttime.

[0062] Next, in utility cost setting (S204), the power cost setting unit 21a and the fuel cost setting unit 21b set the power and fuel costs.

[0063] In system construction setting (S206), the system construction setting unit 30 constructs a system configuration of the heat and power supply facility M. This system construction setting unit 30 can arbitrarily set multiple heat and power supply devices of the same model, models with different capacities, models requiring different energy for operation, or models from different manufacturers, and operate each device according to the operating conditions set by the operating condition setting unit 40.

[0064] Each performance data of the heat and power supply devices is stored in the device performance DB 103 of the DB group 100, and is set by reading this performance data in the device data reading (S207). The device performance DB 103 stores data categorized by device, manufacturer, model number, fuel, capacity, and performance for each of the above-mentioned device systems. The performance data is read by selecting one of these categories via the system configuration setting unit 30 and the display control unit 70.

[0065] 1a, and also constructs a system for the heat and power supply facility on the flow chart. This flow chart is a diagram in which multiple types of heat and power supply devices that can constitute the heat and power supply facility M, the supply energy supplied to the heat and power supply facility M and received by each heat and power supply device, and the combined total energy produced by the heat and power supply facility M and supplied to the utilization facility are connected and associated in advance with connection lines.

[0066] The type of energy these heat power supply devices receive and the energy they produce and supply are specified by the type of heat power supply device. Therefore, it is possible to create a heat power supply facility in advance as a flow diagram in which each heat power supply device and the energy received and / or produced by that heat power supply device are associated with each other by connection lines. The connection lines are assigned to each type of energy received and / or produced.

[0067] By selecting a thermoelectric power supply device on the flow diagram, the selected thermoelectric power supply device and energy are clearly displayed, allowing for visual understanding of the relationship between the thermoelectric power supply device and energy. This allows even non-experts to build a thermoelectric power supply system M. The solid lines in Figure 1b indicate the internal power consumption of each device M150, M220, M310, M380, etc. The output characteristics of solar power supply devices vary depending on the amount of solar radiation on a slope based on horizontal solar radiation data and the outdoor air temperature, resulting in fluctuations in the amount of electricity produced and the amount of solar hot water heat. The charge and discharge conditions of the energy storage device affect the amount of charge and discharge, which in turn affects the amount of electricity used (power load). Fluctuations in the internal power consumption, the output characteristics of the solar power supply devices, and the amount of charge and discharge of the energy storage device contribute to changes in the energy balance, which is maintained through convergence calculations. The flow diagrams shown in Figures 1a and 1b are merely examples and can be configured as needed. Multiple types of flow diagrams may be created and stored in advance.

[0068] The heat and power supply devices that make up the heat and power supply facility are classified by system and organized by device type. Therefore, by selecting devices classified by system, such as at least the power generation system, boiler system, chilled water system, hot water system, low-temperature chilled water system, hot water supply system, and solar-related system, and reading the device data, the devices are considered to be selected for that system. Depending on the function of each system, the heat and power supply devices and the heat and power supply devices can be associated with each other and with the combined total energy system and the supplied energy. As a result, when each device is read, it is appropriately connected and can play a role in sharing the load of the system balance results. However, the device selection merely configures the heat and power supply facility, and the devices are operated according to the priority order set by the operating condition setting unit 40.

[0069] Here, the device performance data of the heat and power supply devices read from the device performance DB 103 as described above will be described. The equipment performance data of the gas engine cogeneration M150 is determined by polynomial regression equations for the power generation efficiency, steam recovery rate, and waste hot water recovery rate at the four load factors shown in Figure 5a.

[0070] Also, set the minimum load rate, auxiliary power consumption, and startup loss. For auxiliary power consumption, set the output percentage at rated load and partial load (50% load operation). Also, set the minimum load rate at which the gas engine must be stopped. Set the number of minutes of energy loss at startup (equivalent to rated operation (100% load rate)).

[0071] Furthermore, you can set the capacity, number, and fuel of the main engines, the NOx value, the capacity per gas engine, and the blowdown amount from the waste heat boiler used to calculate water consumption. You can also set whether to use the steam and waste heat from the gas engines externally.

[0072] Equipment performance data for the gas engine cogeneration M150 is read by the system configuration setting unit 30 from the equipment performance DB 103 by selecting the power generation system, capacity, manufacturer, etc. Data is set by reading this data. Steam generated from the cogeneration waste heat boiler is supplied to the low-pressure steam set as the type of gas engine recovered steam in the process condition setting unit 22. The pressure and enthalpy of the generated low-pressure steam are set at a low-pressure steam pressure of 0.785 MPaG and a low-pressure steam enthalpy of 2770.9 kJ / kg, which are set in the process condition setting unit 22. Waste hot water HHW generated from the gas engine M150 is supplied to the waste hot water header H3.

[0073] The equipment performance data for the low-pressure boiler M220 sets the thermal efficiency % at multiple arbitrary load factors % of the low-pressure boiler. Also, as above, the blowdown amount, the capacity, number, and fuel of the main equipment, NOx value, power consumption of auxiliary equipment, and energy loss at startup are set. The performance data for the low-pressure boiler M220 equipment is also set by reading data, as above. The destination of the steam generated from the low-pressure boiler and the pressure and enthalpy of the low-pressure steam are set according to the conditions set in the process condition setting unit 22, as above.

[0074] The equipment performance data for the absorption chiller M310 sets the COP during chilled water mode operation at any number of partial load factors. By setting these, the relationship between the COP in each mode and the cooling water temperature as parameters is set, similar to the regression equation above, and the changing COP%. The design temperature differences for the chilled water and cooling water are also set. The cooling water temperature can be set to any temperature given to the outside air wet-bulb temperature, river water, or seawater temperature data, for example, wet-bulb temperature + 5°C, and the lower limit at which the equipment can be operated is also set. The CPO and outlet temperature in each mode can also be added as parameters. The same applies to each of the following equipment.

[0075] The relationship between the chilled water mode COP and the COP% that changes with cooling water temperature as a parameter, and the relationship between the COP% and the cooling tower capacity with wet-bulb temperature as a parameter are similarly determined using the above regression equation. Also, the number of main units, design capacity and actual capacity (capacity in the event of aging, etc.), capacity and power consumption per fan of the auxiliary cooling tower, cooling tower capacity, and auxiliary cooling tower makeup water concentration factor are set. The relationship between the outside air wet-bulb temperature of the auxiliary cooling tower and cooling capacity is set using the above regression equation.

[0076] Furthermore, the pump power consumption, etc. is set. The pump power consumption is set by setting the head of each chilled water pump and cooling water pump. Since the head varies depending on the equipment, it is entered manually. The pump flow control method is also set to, for example, constant flow. Furthermore, the power consumption of the absorption chiller's auxiliary equipment and the energy loss at startup are set in the same way as above.

[0077] In the pump efficiency calculation process, once the heads are set, the pump efficiency and other parameters are automatically calculated and set. Note that while pump efficiency is used as an example, motor efficiency is calculated in the same way. In this example, the specific gravity of both chilled water and cooling water is set to 1, since they are both water.

[0078] First, the pump capacity is calculated. This is calculated internally from the heat processed by the thermoelectric machine and the temperature difference. The pump efficiency is calculated using the calculated pump capacity. Note that the JIS B8313 A efficiency is approximated by a logarithmic cubic expression of the pump capacity. Next, the motor shaft power is calculated, and the motor margin is calculated based on that pump shaft power. The value entered above is referenced for the pump head. The motor required power is calculated from the calculated motor margin and motor shaft power. The motor efficiency is calculated based on the calculated motor required power. Next, the motor and pump overall efficiency is calculated from the calculated motor efficiency and pump efficiency, and the calculation result is set as the pump efficiency. The pump capacity, pump shaft power, and motor required power calculated in the above steps are stored as internal data.

[0079] Furthermore, the location of the heat generated by the absorption chiller is set. It is possible to select either the attached cooling tower or the group cooling tower. Alternatively, instead of the cooling tower, it is also possible to select direct heat from river water / seawater, which is the externally used water W shown in Figure 1a, or indirect heat from river water / seawater (via a heat exchanger). In addition to river water / seawater, externally used water W also includes sewage, well water, and treated sewage water. When river water / seawater is selected, the heat is released using the temperature data set by the temperature data setting unit 24 in the basic condition setting unit 20. For direct heat release to seawater, select seawater and the heat is released to seawater under the specified temperature conditions. For indirect heat release, the water pump M960 shown in Figure 1a is added to the heat and power supply equipment to exchange the heat and release it to the sea in the same way.

[0080] If the thermoelectric power facility is equipped with a heat pump, such as an air-cooled heat pump or an electric heat pump, heat extraction settings can be configured in the same way. An air-cooled heat pump extracts heat from the outside air to produce hot water. An electric heat pump can also extract heat from a cooling tower or externally used water W to produce hot water. Because hot water is used for heating and its load increases in winter, air-cooled heat pumps extract heat from air with low outside temperatures, resulting in a low COP and low efficiency. On the other hand, since externally used water W is higher than the outside temperature even in winter, extracting heat from the externally used water W with an electric heat pump can efficiently produce hot water with a high COP. For example, the heat extraction source for the electric heat pump can be set by selecting river water / seawater. Performance data for the absorption chiller M310 can also be set by importing data in the same way as above. The steam supply, pressure, and enthalpy of the low-pressure steam are the same as above.

[0081] The equipment performance data for the turbo chiller M350 is set by setting the capacity and number of main units. In addition, the partial load rate and COP during chilled water operation are set, and the relationship between the chilled water COP and the COP% that changes using the chilled water COP and cooling water temperature as parameters is set. The design chilled water temperature difference, chilled water temperature difference, and cooling water temperature are set. These settings are the same as for absorption chillers. The relationship between the chilled water COP and the load rate as parameters and the relationship between the chilled water COP and the cooling water temperature as parameters is also determined using regression equations in the same way. The pump efficiency and heat exhaust destination are also set in the same way as absorption chillers, and are set by reading in the equipment data.

[0082] The equipment performance data for the Genelink M380 includes the relationship between the amount of waste heat recovered and the load factor, as shown in Figure 5b, and the relationship between the fuel consumption rate and the load factor, as shown in the same figure. When the load factor is in the range below point P1, chilled water can be produced using only waste hot water, but when it exceeds that point, waste hot water is also recovered while consuming fuel.

[0083] The equipment performance data for the photovoltaic power generation equipment M1100 includes the type of solar cell panel (e.g., crystalline or amorphous), the total rated output per panel, the solar radiation intensity under standard test conditions, the minimum solar radiation for extracting power, the module conversion efficiency, the output efficiency (effective efficiency), power consumption, and rated output of the power conditioner M1101. These data are stored in the equipment DB 103 and are set by reading them. The number of panels and the array installation method (mounting system, rooftop, roof-integrated, etc.) are also set. The effective power generation is then calculated based on these settings, the slope solar radiation (set slope) based on the horizontal surface solar radiation data previously obtained from the process condition setting unit 22, the outdoor temperature, and the wind speed. Thus, the photovoltaic power generation equipment has output characteristics that vary depending on the slope solar radiation, outdoor temperature, and wind speed. Details of the calculations are described in Japanese Patent Publication No. 6118973 filed by the applicant of the present application.

[0084] The device performance data of the power storage device M190 includes the power storage capacity and the charge / discharge efficiency, and is set, for example, via an input form. Note that the charge / discharge conditions of the power storage device M190 are set by a power storage condition setting unit 41, which will be described later.

[0085] The operating condition setting unit 40 sets whether or not to operate and / or the operating priority of each heat and power supply device by time period for each month, day, and pattern in setting the operating conditions (S208). An operation plan for the heat and power supply devices is created by setting these operating conditions. As shown in Figures 7(a) and 7(b), a daytime operation plan for power generation equipment and boiler equipment is set. On this setting screen, daytime hours (e.g., 8:00 to 22:00) are divided into two time slots, and up to eight priorities can be set for each time slot according to the load conditions. Note that this is only an example of a setting, and the number of time slots and priorities that can be set can be increased or decreased as needed. For example, it is possible to divide 8:00 to 22:00 into six time slots and set up to eight priorities for each time slot. The operation mode of the power generation equipment can also be selected from power purchase control operation, maximum power generation operation, and heat-dominant operation (heat load priority). In Figure 7(a) and 7(b), the low-pressure boiler and gas engine cogeneration are set to operate from 8:00 to 18:00, and the power generation equipment is set to power purchase control operation. Furthermore, as shown in Figure 7(c), the low-pressure boiler is set to operate at night (e.g., from 22:00 to 8:00), and the power generation equipment is set to power purchase control operation. The item for setting the minimum amount of purchased power specifies the minimum amount of power to be purchased from the power company, and is set to 0 kW in the figure.

[0086] In addition, a load sharing method for multiple power generation equipment is selected and set, specifying the operation control method for multiple power generation equipment. The figure shows an example where "Partial load only for last unit" is set. "Partial load only for last unit" is set when adjusting power generation by operating the last-prioritized equipment at a partial load. Settings such as "All GT / All GE equal load operation" and "Last model equal load only" are also possible. "All GT / All GE equal load operation" is set when adjusting power generation by operating all configured generators (gas turbines and gas engines) at the same load. The "Last model equal load only" setting is set when multiple generators have multiple equipment with the last priority and the power generation is adjusted by these multiple last-prioritized equipment. In this way, when multiple power generation equipment is set, various generator control methods can be considered. Note that nighttime hours (e.g., from 10:00 PM to 8:00 AM) can also be set in the same way. The daytime and nighttime hours can be freely changed, and daylight saving time can also be accommodated.

[0087] Operating conditions are also set for chilled water and hot water equipment. For example, daytime hours (8:00 to 22:00) are divided into four arbitrary time slots, and up to 20 priorities are set for each time slot depending on the load situation. Note that the number of time slots and priorities set can be increased or decreased as appropriate, as above. In addition to the priorities, the outlet temperature of each device is also set. Low-temperature chilled water equipment can be set in the same way.

[0088] 1b, when the heat and power supply facility M includes an electric power storage device M190, the operation condition setting unit 40 regards the electric power storage device M190 as a type of power generation device and determines the priority of the electric power storage device compared to other power generation devices. Note that the time period for setting the operation priority of the electric power storage device is a time period that includes at least the time period during which the electric power storage device discharges. This is because discharging from the electric power storage device can be regarded as being equivalent to power generation by the power generation device.

[0089] The power storage condition setting unit 41 also sets the storage capacity and charge / discharge efficiency as the configuration of the power storage device, and the setting method for the operating parameters as the charge / discharge conditions. Furthermore, the power storage condition setting unit 41 sets the operation method, minimum storage amount, upper limit of received power during peak cut operation, charge schedule, and discharge schedule as the charge / discharge conditions. Peak cut operation, scheduled discharge, etc. can be selected as the operation method. The charge schedule may set the maximum possible charge amount for each charge start time and time slot, or may set the charge amount for each arbitrary time slot. The discharge schedule sets the maximum possible discharge amount that can be discharged for each arbitrary time slot.

[0090] As shown in Fig. 1b, when a photovoltaic power generation device M1100 is included in the heat and power supply facility M, the operating condition setting unit 40 forcibly prioritizes the photovoltaic power generation device over the power generation devices, regardless of the operating conditions (operating order) set by the user as shown in Fig. 7. This applies regardless of the time of day. Since the amount of solar energy supplied cannot be adjusted, the power generated by the photovoltaic-related devices is prioritized over other priorities in order to effectively utilize the power and absorb fluctuations in the power.

[0091] Furthermore, the photovoltaic power generation output condition setting unit 42 sets output control for the photovoltaic power generation device M1100. Here, output restriction refers to, for example, a case where a power company requests a photovoltaic power generation company to suppress (limit) the output of photovoltaic power generation. In particular, when the heat and power generation facility M includes a power storage device M190, the output control of the photovoltaic power generation device is set to continuous control. Conventional output control of photovoltaic power generation devices could only be controlled in units of the number of photovoltaic power generation modules (arrays), resulting in stepwise output control and requiring a significant amount of purchased power for adjustment. However, technological advances have made it possible for power conditioners to control the rated output in 1% increments, making it possible to continuously control the output of photovoltaic power generation. In the present invention, the rated output control in 1% increments by the power conditioner is set as continuous control of photovoltaic power generation. This makes it possible to simulate a heat and power generation facility M including a power storage device M190 even when the power company imposes a photovoltaic power generation output restriction.

[0092] Furthermore, the connection state selection unit 42a selects whether the connection between the photovoltaic power generation device and the power storage device is AC connection or DC connection. When DC connection is selected, the output efficiency (effective efficiency) of the power conditioner is set to 1. The DC-DC converter in DC connection is equivalent to the power conditioner in AC connection, and there is almost no conversion loss in the DC-DC converter. This selection makes it easy to perform a comparative simulation between AC connection and DC connection.

[0093] The system sets the amount of high-pressure steam, low-pressure steam, chilled water, hot water, and electricity that can be used externally. Multiple time periods are set for each amount, and the amount of electricity received for each time period is set accordingly. For example, if a maximum of 1 ton / h of low-pressure steam is set to be received from a waste incineration facility during the day and night, and the low-pressure steam consumption of the heat and power generation facility is less than 1 ton / h, only the amount of steam required for the heat and power generation facility is received. On the other hand, if the low-pressure steam consumption of the heat and power generation facility is greater than 1 ton / h, the system receives a maximum of 1 ton / h of low-pressure steam, and the shortfall is balanced by the low-pressure steam supplied by the heat and power generation facility. The system also sets the total combined energy amount that can be produced by the heat and power generation facility and supplied to other facilities. These settings are taken into account to balance the supplied energy and total combined energy. High-pressure steam, chilled water, hot water, and electricity are all processed in the same way. This allows the operating condition setting unit 40 to set an operation plan for the heat and power generation facility while referencing the energy load set by the energy load setting unit 10.

[0094] In the heat and power supply facility M shown in FIG. 1b, a gas engine and a low-pressure boiler are configured in the examples shown in FIGS. 7(a) and (b). Furthermore, since solar power generation equipment generates electricity based on solar radiation regardless of whether it is daytime or nighttime, when a solar power generation equipment is incorporated into the heat and power supply facility, the solar power generation equipment is prioritized over other power generation equipment during daytime hours. Therefore, the gas engine takes priority after the solar power generation equipment. The minimum power purchase amount is set to 0 kW. On the other hand, in the example shown in FIG. 7(c), only the low-pressure boiler is displayed at night, and the solar power generation equipment is prioritized even during nighttime hours. The minimum power purchase amount is not set, and power is purchased when there is a power shortage. Furthermore, the equipment used for hot and cold water during the day is set to be a Genelink, an absorption chiller, and an electric turbo chiller. On the other hand, only the absorption chiller is set at night. These settings are configured for 12 months. Since the heat and power supply facility includes an energy storage device, it is possible to set the priority between the gas engine and the energy storage device, at least during the energy storage device's discharge time.

[0095] After the operating conditions are set in each step, a simulation is performed and the results are output. In the output step (S210), the operating result output unit 50 outputs the simulation results by time period and / or as annual calculations. The output format may be a graph, a report, or the like.

[0096] The time-of-day and annual calculation output can include the power balance, low-pressure steam balance, fuel consumption, chilled water balance, number of operating units, metered charges (utility costs), detailed power consumption, and power consumption (utility consumption).It is also possible to output the charge / discharge balance of power storage devices, the amount of power generated by solar power generation, etc.

[0097] Here, the operation condition setting (S208) by the operation condition setting unit 40 and the simulation calculation procedure by the calculation unit 7p will be described below with reference to Figures 2c, 3, 8a-e, and 9. These steps consist of steps S01-S07 in Figure 8a, which correspond to Figures 8b-e. In the following explanations, power purchase control operation is operation in which no reverse power flow occurs, and maximum power generation operation is operation in which the power generation equipment operates at 100% load and allows reverse power flow. In addition, in describing each step, only steps related to the example using the heat and power supply equipment of Figure 1b will be shown first, and the case of power purchase control operation in August will be illustrated. As shown in Figure 1c, this heat and power supply equipment M has photovoltaic power generation equipment AC-coupled to the AC bus via a conditioner. When both photovoltaic power generation equipment and power storage equipment are included, as in this heat and power supply equipment M, power-priority operation is performed, and YES is selected in steps S34 and S72 in Figures 8c and 8e. Therefore, the description of the heat-dominant operation will be omitted. Details of the heat-dominant operation are as described in Japanese Patent No. 6118973 filed by the present applicant.

[0098] "Cold water EB (S01, Figure 8b)" First, the chilled water heat load and return temperature difference are read (S11), and the required chilled water flow rate is calculated (S12). Next, the number of operating chillers that satisfy both the chilled water heat load and chilled water flow rate is determined based on the chiller operation priority (S13), and the operating load factor and COP of each operating chiller are calculated (S14). In this calculation, if the chilled water outlet temperature setting is the same, a uniform load factor is used. Next, the cold heat production amount of each operating chiller, the electricity, fuel, and steam consumption, cooling tower waste heat, and hot water recovery heat amount from the heat recovery HP are calculated (S15), and the process moves to the hot water energy balance step (S2). Note that the cooling tower waste heat can also be used as external water as described above.

[0099] "Low-pressure steam EB (S03, Figure 8c)" As shown in the figure, first, the low-pressure process steam heat load is read (S31a), and the low-pressure process steam volume is calculated (S31b). The low-pressure steam consumption volume is calculated from the sum of the low-pressure process steam volume and the low-pressure steam volume for driving the thermoelectric equipment (S31c), and it is determined whether the power generation equipment is low-pressure steam recovery (S32a). If low-pressure steam recovery is not performed, the number of low-pressure boilers to operate that meet the low-pressure boiler load is determined based on the low-pressure boiler operation priority (S33a). The operating load factor of each operating low-pressure boiler is calculated (partial load factor for only one boiler) (S33b), and the steam production volume, power consumption, and fuel consumption of each operating low-pressure boiler are calculated (S33c).

[0100] On the other hand, if the power generation equipment is a low-pressure steam recovery system, the low-pressure boiler load S2 is calculated by subtracting the low-pressure steam intake amount from the low-pressure steam consumption amount, and the steam generation amount, power consumption amount, fuel, etc. of the low-pressure boiler are calculated (S32b). Here, the low-pressure steam intake amount can also include exhaust steam intake from outside. Then, it is determined whether the system is in power-dominated operation or heat-dominated operation (S34).

[0101] In the case of power purchase control operation (power priority), steps S35a to S35f and the power EB steps S71 to S73 enclosed by a dashed line are executed. Note that although power EB07 is shown in FIG. 8e, it will be explained here for ease of understanding. The operating devices and the number of operating devices are set based on the target power generation amount (S35a), and the power generation devices excluding the power storage devices are set to the maximum load factor (100%) (S35b). Then, steps S35c to S35f, S71, and S73 are executed, and if the surplus power is within a certain error range (e.g., 1 kW) (S73), the process ends and proceeds to the subsequent steps. Here, the amount of power generated by the photovoltaic power generation device and the amount of discharge from the power storage device are added to the amount of power generation in steps S35c and S71. Meanwhile, the amount of charge in the power storage device is added to the amount of power consumption. If the surplus power is not within the error range (S73), the load factor P1 of the power generation equipment is changed as described below, and a convergence calculation is performed in which steps S35c to S35f and 71 to 74 are repeated until the surplus power is within the error range.

[0102] Here, the convergence calculation for power purchase control operation using the heat and power supply facility M in Fig. 1b related to steps S35a to S74 will be explained in more detail. The required number of chillers and the load factor are calculated from the chilled water load and the chilled water temperature difference, and it is determined that there will be one generic chiller M380 and one absorption chiller M310. Then, the required amount of low-pressure steam S2 (t / h) is calculated from the load factor at this time (S32b).

[0103] The difference (Ea-W1) kW between the system power consumption Ea and the minimum power purchase amount W1 is set as the target power generation amount, and the number of operating gas engine cogeneration units such as the M150 is determined by subtracting the amount of solar power generated and the amount of discharged electricity from the power storage devices (S35a). The system power consumption Ea includes the internal power consumption of the M150, M220, M310, M350, M380, etc., and the power load S8. Furthermore, this power load S8 includes the amount of charge in the power storage devices. The load factor of the power generation system equipment excluding the gas engine M150 and other power storage devices is set to 100% (S35b). Then, the power generation amount G1 (kW / h), recovered steam amount S1 (t / h), internal power consumption, fuel consumption, etc. of the set gas engine are calculated from the performance curve (S35c).

[0104] From the results of this calculation, the recoverable amount of low-pressure steam S1(t) is calculated, and S1 and S2 are compared to determine whether excess steam is being generated (S35d). If there is excess steam, it is discarded outside the facility (S35e). If there is a shortage of steam, the low-pressure boiler M220, which corresponds to S3(t / h) = S2 - S1, is operated, and the amount of steam generated, internal power consumption, fuel consumption, etc. are calculated (S35f). Then, from the above results, the power consumption Ea within the system, including the amount of charge in the power storage device, is integrated (S71a).

[0105] Although not shown in the figure, only in the first loop of S35c to S71 and S73, the gas engine cogeneration determines whether the amount of power generation is insufficient, taking into account the amount of solar power generation Es and the amount of charge and discharge of the power storage device. If G1≦Ea-W1-Es, the insufficient power is purchased and the calculation ends. On the other hand, if G1>Ea-W1-Es, it is determined whether ABS(G1-(Ea-W1-Es)) is within the allowable error range α. In this embodiment, the allowable error range α is set to within ±1 kW, and if it is within the error range, the calculation ends.

[0106] If the tolerance is not within ±1kW, the load factor P1 of the gas engine cogeneration system is changed to find the load factor P1 so that G1 = Ea - W1 - Es. However, if the load factor P1 is changed and the recovered steam volume S1 fluctuates, the internal power consumption will fluctuate along with changes in the operating conditions of the gas engine cogeneration system and other equipment, and the system's internal power consumption Ea will also fluctuate. As a result, the original goal of preventing reverse power flow through power purchase control operation cannot be achieved. Furthermore, the amount of power generated by solar power generation equipment fluctuates depending on the amount of solar radiation on the slope, outside temperature, and wind speed. Therefore, until convergence is achieved in S73, a convergence calculation is required, repeating steps S35c to S71 after changing the load factor P1 in S74 as shown below.

[0107] The load factor % can be calculated from the target power generation amount created as a quadratic equation using each explanatory variable, and can be obtained as a quadratic solution. If the power generation amount is smaller than the target power generation amount, the target load factor % is calculated by a convergence calculation using a binary search with Pmin = Pmid. At the same time, the allowable error for the difference between the power generation amount kW at Pmid% and the target power generation amount kW is 1kW or less. Note that the maximum number of convergence calculations is set to 20 in consideration of cases where convergence is not possible, but the number of convergence times can be set appropriately. If convergence is achieved, proceed to the next step (S36a).

[0108] The binary search method is merely one example of a convergence calculation method using numerical calculation of algebraic equations. Convergence calculation methods using numerical calculation of algebraic equations are numerical calculations of equations that do not include differential or integral calculus, such as higher-order algebraic equations, fractional equations, irrational equations, or transcendental equations. Other representative methods that may be used include the Newton-Raphson method, binary search method, regular-Falcy method, Bairstow-Hitchcock method, Lin method, Bernoulli method, and Greffe method. All convergence calculations in this invention can use any of these methods.

[0109] Here, we will explain an example in which "peak cut operation" is selected as the operating method for the charge and discharge conditions of the power storage device. Peak cut operation is an operating method in which the purchased power of the heat and power generation facility is discharged when it exceeds a preset power purchase amount, thereby keeping the purchased power below a certain value. For example, Figures 9a to 9c show graphs and reports in which the configuration of the power storage device is set to a storage capacity of 6500 kWh and a charge and discharge efficiency of 95%, and the charge and discharge conditions are set to a maximum received power value of 2000 kW during peak cut operation, a charging schedule with a charging start time of 10:00 PM, and a maximum possible charging amount per time slot of 800 kW.

[0110] In the example shown in the figure, power consumption is not covered solely by the gas engine's power generation, so electricity is purchased between 4 and 5 p.m. However, power is discharged from the energy storage device to maintain a power balance such that the upper limit for power reception (power purchase amount) does not exceed 2,000 kW. From 6 to 8 p.m., power consumption is fully covered by purchased power, but power is discharged from the energy storage device to maintain a power balance such that the upper limit for power reception does not exceed 2,000 kW. That is, the calculation unit determines the amount of power that exceeds the upper limit for power reception as the amount of discharge from the energy storage device. Here, the charging schedule sets the charging start time at 10 p.m. and the charge amount to 800 kW. However, because energy storage devices cannot charge and discharge simultaneously, discharging takes priority. Furthermore, during the time period from midnight to 1 a.m., the charge amount is less than the set value. This is because it is sufficient to ensure a charge amount that corresponds to the total discharge amount for the day, so the charge amount is adjusted and charging is completed by 1 a.m. In this way, the calculation unit calculates the charge amount for each time period excluding the time period during which the energy storage device discharges based on the above-mentioned discharge amount. Then, the charging end time for the energy storage device is determined based on the total discharge amount and the maximum possible charge amount for the day, and the final charge amount for the time period including that charging end time is also determined. Note that the values ​​in the graphs and reports are DC-based values. In this example, the solar power generation device and energy storage device are AC-connected, so the effective efficiency of the conditioner is taken into account during charging and discharging. For example, charging from 10:00 PM to 11:00 PM is 800 kW, so the effective efficiency from the AC bus is 800 kW / 0.95 (effective efficiency) = 842.1 kW. Furthermore, 855.4 kW is discharged from the energy storage device from 6:00 PM to 7:00 PM, so multiplying by the effective efficiency of 0.95 gives an AC equivalent of 812.6 kW.

[0111] Additionally, between 7 and 8 a.m. and 11 and 12 p.m., solar power generation is relatively high compared to power consumption. Here, solar power generation takes priority over the gas engine, which is a power generation system device, so partial load operation is performed to suppress the amount of power generated by the gas engine to prevent reverse power flow. This causes the amount of steam generated to change during those time periods, and a convergence calculation is performed to achieve a steam energy balance.

[0112] Thus, the charging and discharging amounts of the energy storage device are calculated by time period so that the daily charging and discharging amounts of the energy storage device are equal and the power balance is maintained. Then, by incorporating the charging amount of the energy storage device into the power load calculation, it becomes possible to simulate the cogeneration facility equipped with the solar power generation device and the energy storage device, and it becomes possible to calculate the utility consumption based on the usage amount of the added electric energy.

[0113] Compare the relationship between the first solar power generation amount Es + the power generation amount G1 of the gas turbine generator, the necessary power Ea in the system including the charging amount of the energy storage device as described above, and the minimum power purchase amount W1 of the operation condition setting unit 40. For example, when reverse tidal power is generated from 7:00 to 8:00, this corresponds to G1 + Es > Ea - W1. Perform a convergence calculation by sequentially changing the load factor of the gas engine generator to Pmid described above so that the power generation amount from the generator and solar power generation does not reverse-tide to the power company as surplus electricity. When G1 + Es < Ea - W, complete the convergence calculation. Thus, by adjusting the load factor of the cogeneration equipment (gas engine cogeneration M150), it is possible to absorb the fluctuations in the generated power of the solar power generation device and prevent the reverse tide of the generated power.

[0114] Due to the configuration of the cogeneration facility, other balance calculation steps shown in Fig. 8a are performed. Below, steps other than those described above will be explained.

[0115] "Hot water EB (S02)" As shown in Fig. 8b, read the hot water heat load and the round-trip temperature difference (S21), and calculate the required hot water flow rate (S22). Next, based on the operation priority order of the hot water system equipment, determine the number of operating units of the hot water system equipment that satisfies both the hot water heat load and the hot water flow rate (S23), and calculate the operation load factor of each operating hot water system equipment (S24). In this calculation, if the hot water outlet temperature setting is the same, it is set as a uniform load factor, and the load factor of the heat recovery HP may be different from others. Then, calculate the heat production amount, power / fuel / steam consumption amount, heat extraction amount, etc. of each operating hot water system equipment (S25), and shift to the previous low-pressure steam EB (S03). Note that the heat extraction amount can also be from external utilization water (such as seawater, river water, etc.).

[0116] "High-pressure steam EB" This is not shown in the figure because it is almost the same except that the "low-pressure steam" in the low-pressure steam EB of S03 is replaced with "high-pressure steam." However, the difference is that the amount of low-pressure steam that is decompressed in the header and accepted as low-pressure steam does not become surplus steam in the previous step S35e. From reference B of the low-pressure steam EB (S03), the gas engine waste hot water EB (S05) is executed after reference C via the high-pressure steam EB (S04), the details of which are not shown.

[0117] "Gas engine wastewater EB (S05, Figure 8d)" First, in the chilled water EB (S01), the number of operating units and the load factor of each chilled water equipment are calculated, and the chilled water heat quantity (production amount Ma) A of the waste hot water injection absorption chiller and the chilled water heat quantity of other chilled water equipment are determined (S13-S15). Also, in the hot water EB (S02), the number of operating units and the load factor of each hot water equipment are calculated, and the hot water heat quantity B of the hot water recovery heat exchanger is determined (S23-S25).

[0118] Next, it is determined whether the waste hot water injection absorption chiller is operating (S51a). If it is operating, the amount of waste hot water from the gas engine is calculated, and the amount of chilled water heat A' that can be generated by the waste hot water injection absorption chiller with that amount of waste hot water is calculated (S52a). Then, it is determined whether the generated chilled water heat A' is insufficient compared to the amount of chilled water heat A (S53a). If it is not insufficient, the process proceeds to S55a. On the other hand, if it is insufficient, the number of operating chilled water equipment and the load factor are determined based on the operational priority of the chilled water equipment so that the other chilled water equipment can produce the required amount of chilled water heat (S54a), and the process proceeds to S55a. The steam volume S2 required by the other chilled water equipment and the steam volume S1 generated by the steam generating equipment are calculated (S55a, S56), and it is determined whether the difference between the generated steam volume S1 and the required steam volume S2 is within a predetermined error range α (S57). Note that the unit and value of the error range α vary depending on the energy.

[0119] If the difference is not within the error range α, the load factor of the steam generator is changed (S58), and the process returns to step S52a via the path indicated by symbol SR58a. Steps S52a-S58 are repeated until the shortage of chilled water heat quantity is resolved and the shortage is within the error range α. That is, the load factor of the steam generator is changed so that the generated steam quantity S1 converges to the required steam quantity S2, and a convergence calculation is performed to determine the number of operating chilled water system equipment and / or the load factor that will achieve a balance between chilled water and steam. If the difference is within the error range α, the process proceeds to hot water supply EB (S06).

[0120] On the other hand, if the waste hot water injection absorption chiller is not operating, it is determined whether the hot water recovery heat exchanger is operating (S51b). If the hot water recovery heat exchanger is operating, the procedure follows steps S52b to S58, route SR58b, which are enclosed by a dashed line in the figure. This procedure is the same as for the chilled water equipment described above, and the load factor of the steam generating equipment is changed and a convergence calculation is performed to determine the number of operating hot water equipment and / or the load factor that can balance both hot water and steam. If the hot water recovery heat exchanger is not operating, the procedure proceeds to hot water supply EB (S06).

[0121] "Hot water supply EB (S06, Figure 8e)" First, the hot water heat load, hot water supply temperature, and water supply temperature are read (S61), and the water supply flow rate and the temperature inside the hot water tank are calculated (S62). Next, the operation / stop of the water heaters and the number of units to operate / stop are determined based on the temperature inside the hot water tank (S63), and additional water heaters are operated so that the hot water tank heat storage is full at the specified time (S64). Then, the amount of heat produced, electricity, and fuel consumed by each operating water heater are calculated (S65), and the process moves to the next power EB (S07).

[0122] "Electricity EB (S07)" Here, after S71 described above, a determination is made as to whether or not the system is in power-dominant operation (S72), which is generally the same as the explanation for the low-pressure steam EB. If the system is in heat-dominant operation (S72), the amount of purchased electricity is calculated (S75), and the process ends. When the load factor P1 is reset in power-dominant operation, for the sake of convenience, it is set to return to the point before S35c of the low-pressure steam EB03 (K), but as long as there is no inconsistency in the calculation, it may be set to return to the initial position (K') of the chilled water EB01, for example. It is meaningful to reset the conditions and readjust the operating conditions of the equipment in all systems so that the specific combined total energy converges to the target value.

[0123] Each piece of equipment is modeled with related equipment and is operated according to its operating conditions (load factor), or within the range of any limiting conditions. For example, the calculations take into account the auxiliary power, chilled water pump, cooling water pump, and individual cooling tower associated with a waste hot water absorption chiller, as well as constraints such as startup loss and the minimum operable cooling water temperature. The calculations calculate the amount of recovered waste hot water, gas (fuel), electricity, water consumption, and output chilled water for the waste hot water absorption chiller. If the chilled water flow rate in the load setting unit of a single waste hot water absorption chiller is insufficient, other chillers (e.g., absorption chillers) will start up in the order of the chillers set by the operating condition setting unit 40 to balance the chilled water volume. If the chilled water balance cannot be achieved, the last-priority equipment (e.g., a turbo chiller) will automatically start up again to balance the volume.

[0124] The steam supplied to the absorption chiller is configured to be supplied from steam generated in the boiler system and power generation system based on the required steam balance. As with the chilled water system, each device in the boiler system and power generation system is modeled, and the amount of rising steam and the amount of power generation are balanced in the order set by the operating condition setting unit 40. If the steam balance cannot be achieved, the boiler system equipment, which has the lowest priority, is configured to start up again to achieve balance. The power generation system equipment can be handled by purchasing electricity, and is configured not to start up again to reduce the burden of convergence calculations. If surplus power remains even when the gas engine generator is stopped, the output of the solar power generation equipment is reduced to achieve power balance.

[0125] In this way, the procedure for system balance calculation is to assemble the thermoelectric balance for each system in order, for example, chilled water, hot water, low-pressure steam, high-pressure steam, hot water supply, and electricity. If any changes occur to the assembled conditions, a convergence calculation is performed using a multivariable algebraic equation numerical analysis method to calculate the thermoelectric balance for all systems. Based on this balance result, the output of each device operated at its load is organized into the required information and output by the operation result output unit 50 as described above. The output is in the form of graphs or reports by time period and annual calculation output as described above.

[0126] Next, other possible embodiments of the present invention will be described, in which the same components as those in the above-described embodiment are designated by the same reference numerals. In the above embodiment, the charging schedule for peak cut operation of the power storage device is set based on the charging start time of the power storage device and the maximum possible charge amount per time slot. However, the setting of the charging schedule is not limited to this, and it may also be set based on the charging start time and charging end time of the power storage device and the charge amount for each time slot between these times. In such a case, the charging end time of the power storage device or the charge amount for at least one time slot among the time slots is changed based on the total discharge amount for one day and the charge amount for each time slot, so that the total charge amount for one day and the total discharge amount for one day of the power storage device are made equal.

[0127] Furthermore, in the above embodiment, the operation method of the power storage device is peak cut operation, but this is not limiting, and for example, scheduled discharge can also be selected. Scheduled discharge is an operation method in which discharge is performed according to a preset discharge schedule (discharge time periods and the amount of discharge during those time periods). In scheduled discharge, the discharge time periods of the power storage device, the amount of discharge for each discharge time period, and the charging schedule for the power storage device are set. These settings make it possible to simulate, for example, (1) VPP (Virtual Power Plant) power generation, (2) peak shift operation, and (3) operation linked to the wholesale power market price.

[0128] (1) VPP power generation As an example, Figures 10a to 10c show graphs and reports of the power balance when the configuration of the power storage equipment is set to a storage capacity of 8000 kWh and a charge / discharge efficiency of 95%, and the charge / discharge conditions are set as follows: charging start time is 8:00 PM, maximum possible charge amount per time slot is 800 kW, and discharge schedule is set to a maximum possible discharge amount of 1800 kW from 10:00 to 1:00 PM, and a maximum possible discharge amount of 2000 kW from 1:00 to 4:00 PM. In the example in the figures, the two gas engine cogeneration units are given priority over the power storage equipment during the time slot that includes the discharge time slot.

[0129] In VVP power generation, the power selling condition setting unit 43 further sets the amount of power selling and the power selling time period for supplying (selling) power from the heat and power generation facility to the outside.

[0130] For example, the system may be configured to sell 1,000 kW of electricity from 10:00 to 1:00 PM and 1,500 kW from 1:00 to 4:00 PM. As shown in FIGS. 10A and 10B, during the power selling time period set by the power selling condition setting unit 43, the set amount of electricity sold is supplied (power consumed) to the outside, while the power storage device discharges electricity based on a discharge schedule so that the power selling conditions are met and the power balance is maintained. In the example shown in the figure, 1,000 kW of electricity is required for supply (sale) as VPP power generation from 10:00 to 12:00 PM, but the amount of solar power generation is relatively large compared to the amount of electricity consumed, including the supply power. As in the above embodiment, solar power generation has a higher operational priority (condition) than the gas engine of the power generation system equipment. Therefore, partial load operation is performed to suppress the power generation of the gas engine to prevent reverse power flow. This changes the amount of steam generated during the time period, and a convergence calculation is performed to achieve a steam energy balance. Furthermore, partial load operation is also performed from 8:00 to 12:00 PM to suppress the power generation of the gas engine to prevent reverse power flow.

[0131] On the other hand, between 12:00 and 16:00, as power consumption increases, there is a power shortage even with solar power generation, so the power balance is achieved by discharging from the energy storage device. Here, the charging schedule is set to start charging at 20:00 and charge amount of 800 kW, but since energy storage devices cannot charge and discharge simultaneously, discharge takes priority. Also, between 12:00 and 1:00, the charge amount is less than the set value. This is because it is sufficient to ensure a charge amount that corresponds to the total discharge amount for the day, so the charge amount is adjusted and charging is completed by 1:00. In this way, the calculation unit calculates the charge amount for each time period excluding the time period during which the energy storage device discharges, based on the above-mentioned discharge amount.

[0132] That is, the calculation unit calculates the discharge amount of the power storage device so that the amount of power sold is satisfied, and calculates the charge amount of the power storage device for each time period excluding the discharge time period based on the charging schedule. In this way, the VPP supply power can be set as external power (reverse power) for each time period, and the amount of power that can be supplied by the VPP can be considered for each monthly pattern. Then, based on the results of this consideration, a quantitative contract can be made with the power company.

[0133] (2) Peak shift operation Peak shift operation is an operation aimed at leveling out purchased power, and is basically an operation in which power is discharged during time periods when the amount of purchased power is high and charged during time periods when the amount of purchased power is low. The settings in this case are the same as those described above, and the discharge time periods of the power storage device, the maximum possible discharge amount for each discharge time period, and the charging schedule for the power storage device are set. The operation priority of the power storage device and other power generation devices is set for time periods that include at least the set discharge time periods. Then, the calculation unit calculates the charge amount of the power storage device for each time period excluding the discharge time periods based on the set charge schedule, and achieves power balance. In this example, a gas engine cogeneration system is used as an example of the other power generation device.

[0134] In the example shown in Figures 11a-c, charging is performed between 10 PM and 7 AM according to the set charging schedule, and is added to the power load. Then, discharging begins after 8 AM according to the set discharge schedule, and the amount of power generated by solar power generation also increases. Therefore, if the power storage device is set as the top priority of the power generation equipment, the gas engine cogeneration system will operate at 100% capacity between 7 AM and 10 AM. However, since solar power generation is sufficient between 10 AM and 3 PM, the gas engine cogeneration system will operate at partial load without purchasing any power, and power balance will be achieved. Furthermore, this partial load operation also reduces the amount of low-pressure steam and waste hot water generated (supplied), and convergence calculations are performed to balance these energies with the other equipment.

[0135] On the other hand, if the gas engine cogeneration system is set as the first priority (100% load) of the power generation equipment, as shown in the example of Figures 11d to 11f, solar power generation is sufficient between 10:00 and 12:00, so the gas engine cogeneration system operates at partial load without discharging from the power storage equipment, and the power balance is maintained. During other time periods, the power storage equipment discharges as needed to match the power load.

[0136] (3) Operation linked to wholesale electricity market prices Some electricity rates are set in conjunction with the wholesale electricity market price. For example, the electricity rate is set to effectively 0 yen / kWh during daytime hours when solar power generation is high, and the electricity rate is set higher during other hours when solar power generation is low. This wholesale electricity market price linked operation is an operation in which electricity is discharged during hours when electricity rates are high and charged during hours when electricity rates are low, similar to peak shift operation that aims to level out purchased electricity. Therefore, in this case, as with the peak shift operation described above, the discharge time periods of the energy storage device, the maximum possible discharge amount for each discharge time period, and the charging schedule for the energy storage device are set.

[0137] In the example shown in Figures 12a-c, the charging start time is set to 8:00 AM, when solar power generation is high. Charging occurs between 8:00 AM and 4:00 PM according to the maximum possible charging amount per time slot, and this is added to the power load. Furthermore, because electricity rates are set low during these times, the gas engine cogeneration system is not operated and instead uses purchased electricity, reducing running costs. Furthermore, according to the set discharge schedule, electricity is discharged from the energy storage device between 5:00 AM and 8:00 AM and between 4:00 PM and 9:00 PM. Therefore, if the energy storage device is set as the top priority of the power generation system, the gas engine cogeneration system operates at 100% capacity between 9:00 PM and 1:00 AM, minimizing the amount of purchased electricity. Furthermore, from 1:00 AM to 5:00 AM, the gas engine cogeneration system operates at partial load without purchasing electricity, following the decrease in power consumption by the utilization equipment, thereby achieving power balance. Furthermore, this partial load operation reduces the generation (supply) of low-pressure steam and waste hot water, and convergence calculations are performed to balance these energies with other equipment. In addition, between 4pm and 9pm, thermal power generation will be used instead of solar power generation, which will also have the effect of reducing CO2 emissions.

[0138] Furthermore, in each of the above embodiments, the power storage devices are of one series. However, the simulation can be similarly performed for two series, not just one series. In such a case, the power storage condition setting unit 41 sets the power storage capacity and charge / discharge efficiency of each series. Then, the calculation unit 7p regards the two series of power storage devices, in which the charge / discharge amounts are distributed so that the state of charge (SOC) of the power storage devices of each series is equal, as one power storage device. When two series of power storage devices are used, they are connected in parallel and charge / discharge is performed.

[0139] Here, the charging rate of an electricity storage device is the remaining (stored) amount of electricity divided by the capacity of the electricity storage device and expressed as a percentage, and can also be expressed as SOC (State Of Charge) or remaining capacity. In the simulations of the present invention, the amount of electricity that the electricity storage device can actually discharge (charge) is set to 100% (fully charged) to 0% (fully discharged). Therefore, for example, if a catalog or technical document for an electricity storage device states that the device should be used at an SOC of 30% to 80%, this "30% to 80%" corresponds to "0% to 100%" in the present invention.

[0140] Furthermore, when the conversion efficiencies of the DC-AC converters connected to the respective energy storage devices of each series are different, the calculation unit 7p calculates the overall efficiency of the two series of energy storage devices as a whole during charging and discharging, and uses the calculated overall efficiencies during charging and discharging to treat the two series of energy storage devices as a single energy storage device.

[0141] As shown in FIG. 14a, when the photovoltaic power generation equipment is AC-coupled to the storage equipment, first, the AC-based discharge amount of the storage equipment in the first series is calculated as P D1 , the conversion efficiency η of the bidirectional DC-AC converter of the first series of energy storage devices A1 Then, the DC-based discharge amount of the first-system power storage device is expressed by the following formula 1.

[0142]

number

[0143] In addition, the charge amount P of the first series of storage devices on an AC basis C1 is expressed by the following formula 2.

[0144]

number

[0145] In order to discharge the two series of storage devices so that their SOCs are equal, the DC-based discharge power of each series must be P' D1 ,P' D2 [kW], and the storage capacity of each storage device is QB1 ,Q B2 If the energy consumption is expressed in kWh, the following formula 3 must be satisfied.

[0146]

number

[0147] And the discharge amount on AC basis is P D1 ,P D2 Then, the above formula 3 becomes the following formula 4, and the discharge power ratio (P D2 / P D1 )

[0148]

number

[0149] Therefore, the overall efficiency during discharge is calculated by the following formula 5.

[0150]

number

[0151] On the other hand, in order to charge the two series of storage devices so that their SOCs are equal, the DC-based charging power for each series should be P' C1 ,P' C2 [kW], and the storage capacity of each storage device is Q B1 ,Q B2 If the ratio is expressed in kWh, the following formula 6 must be satisfied. This formula 6 becomes formula 7, which is the ratio of charging efficiencies. The overall efficiency during charging can also be calculated using formula 8 below, just like during discharging.

[0152]

number

[0153]

number

[0154]

number

[0155] On the other hand, as shown in Figure 14b, when the photovoltaic power generation equipment is DC-coupled to the storage equipment, the output P PV Of this, the portion that flows to the storage device is the charging power P' C is expressed as the following formula 9. Then, the distribution of photovoltaic power generation power at this time is expressed as the following formula 10. As a result, the overall efficiency can be found even in the case of two series of DC connections.

[0156]

number

[0157]

number

[0158] In the above embodiments, the thermoelectric equipment includes a cogeneration system as a power generation system. However, it is also possible to simulate the utilization of surplus solar power generation in a thermoelectric power generation facility that does not include a power generation system such as a cogeneration system, but includes an electricity storage device, a solar power generation device, and a heat source device.

[0159] When simulating the utilization of surplus solar power, the settings include, for example, the discharge time period of the power storage device, the discharge amount for each discharge time period, and the charging schedule for the power storage device. In this example, surplus solar power is charged and discharged during the evening hours when power is in short supply.

[0160] As shown in FIG. 13a, the charge amount is set for each arbitrary time period as a charge schedule. In this case, the amount of surplus solar power generation predicted (simulated) in advance based on the sunshine conditions, etc., is set as the charge amount. As described above, technological advances have made it possible for power conditioners to control the rated output (continuous control) in 1% increments. Therefore, by using the solar power generation condition setting unit 42 to control the output of the solar power generation equipment continuously, it becomes possible to simulate the power load taking into account the storage and discharge of electricity in a heat and power supply facility M that includes at least a solar power generation equipment and an electricity storage equipment.

[0161] In this example, as shown in Figures 13b and 13c, the power load is not covered by solar power generation between 8:00 and 10:00, so the power balance is achieved by purchasing power. On the other hand, the power load is covered by solar power generation between 7:00 and 8:00, 10:00 to 13:00, and 14:00 and 15:00, so purchasing power is not necessary. The surplus power is then discharged after 16:00, when the unit price of electricity is high, thereby balancing the power load. In this way, by setting the charging schedule taking into account solar radiation forecasts and other factors and assuming a predicted value for the amount of surplus power, it is possible to simulate operations in which surplus solar power generation is used for charging.

[0162] When simulating the utilization of surplus solar power, the configuration of the simulation system for heat and power generation equipment is as follows.

[0163] A simulation system for a heat and power supply facility, in which a plurality of heat and power supply devices are connected, at least electric power and fuel (hereinafter referred to as "supply energy") are supplied, and at least two of electric power, low-temperature chilled water, chilled water, hot water, hot water, high-pressure steam, and low-pressure steam (hereinafter referred to as "composite total energy") are produced and supplied to utilization facilities, is provided, the simulation system determining the relationship between the operating conditions of the heat and power supply devices and the amount of supplied energy used or the amount of produced composite total energy, the thermoelectric device includes at least a solar power generation device, a power storage device, and a thermoelectric device including at least a pump using a motor, an energy load setting unit that sets the amount of composite total energy required by the utilization equipment for each time period on a daily basis; a process condition setting unit that sets process conditions including at least one of an outside air temperature or a wet-bulb temperature of the heat and power generation facility and the utilization facility, and an amount of solar radiation on a horizontal surface of the photovoltaic power generation device; an operation condition setting unit that sets whether or not each of the heat and power generation devices is operable and sets an operation priority for each of the heat and power generation devices for each time period; a calculation unit that calculates at least a usage amount of the supply energy as a result of operating the heat and power supply equipment in accordance with the operating conditions of the operating condition setting unit, the operating condition setting unit further includes a power storage condition setting unit that sets a configuration and charge / discharge conditions of the power storage device, and a photovoltaic power generation output condition setting unit that sets an output efficiency of the photovoltaic power generation device and sets output control of the photovoltaic power generation device to continuous control, any one of the thermoelectric devices excluding the solar power generation device and the power storage device includes a partial load characteristic that varies depending on the process condition; the photovoltaic power generation device has output characteristics that vary depending on an amount of inclined solar radiation based on the amount of solar radiation on a horizontal surface and an outside air temperature, among the process conditions; The calculation unit a calculation of the amount of electric power used by the heat and power supply facility by changing the load factor of the heat and power supply device in accordance with the output fluctuation of the photovoltaic power generation device and the charge and discharge conditions of the power storage device under the continuous control so that the amount of production of any one of the composite total energies becomes the target value set by the energy load setting unit, and determining the charge and discharge amounts of the power storage device for each time period such that the total daily charge amount of the power storage device and the total daily discharge amount of the power storage device are equal and the balance of electric energy can be maintained; Adding the obtained charge amount to the amount of electric energy used for each time period; A simulation system for heat and power facilities that calculates utility consumption based on the total amount of electrical energy used.

[0164] In the above embodiment, the user inputs the panel tilt and orientation of the solar-related equipment, and the amount of solar radiation on the slope is calculated based on the input values ​​(eigenvalues). However, for example, in the case of a sun-tracking solar power generation device, these angles vary depending on the season (month) and time. In that case, instead of user input, it is better to calculate the optimal panel tilt and orientation for each month and hour, for example, and calculate the amount of solar radiation on the slope based on the calculated values. [Industrial Applicability]

[0165] The present invention can be used as a heat and power generation system for a heat and power generation facility connected to multiple heat and power generation devices, supplied with at least electric power and fossil fuels, which produces and supplies electric power, low-temperature chilled water, chilled water, hot water, hot water, high-pressure steam, and low-pressure steam to utilization facilities, and which includes at least solar-related equipment. The present invention can also be used as a system for simulating environmental loads (primary energy, CO2, NOx, SOx) by multiplying the electric power consumption, fossil fuel and other fuel consumption amounts determined by the conditions of the energy load setting unit, basic condition setting unit, system configuration setting unit, and operating condition setting unit, and the unit environmental load determined by the environmental load data setting unit. Furthermore, the present invention can be used for operational diagnosis by simulating the current status of heat and power generation devices, energy savings through changes in operating methods, evaluation of improvements through equipment renewal and associated energy savings and environmental load reduction, and consultation on optimal design of heat and power generation facilities. [Explanation of symbols]

[0166] 1: Simulation system, 2: User terminal, 3: Administrator terminal, 4: DB server, 5: Network, 6: User interface, 6a: Monitor, 6b: Keyboard, 6c: Mouse, 7: CPU (calculation means), 7a: Bus, 7b: Temporary storage memory, 7c: HDD, 7d: Network adapter, 7p: Calculation unit, 7q: Calculation judgment unit, 7x: Data file, 7y: Processing application (calculation means), 7z: Load creation application, 10: Energy load setting unit, 20: Basic condition setting unit, 21: Utility cost setting unit, 21 a: Electricity cost setting unit, 21b: Fuel cost setting unit, 22: Process condition setting unit, 23: Environmental load data setting unit, 24: Temperature data setting unit, 30: System construction setting unit, 40: Operation condition setting unit, 41: Power storage condition setting unit, 42: Photovoltaic power generation output condition setting unit, 42a: Connection state selection unit, 43: Power selling condition setting unit, 50: Operation result output unit, 60: Case file etc. creation unit, 70: Display control unit, 71: Display window, 100: Database group, 100a: Read data, 110: Individual data group, 200: Customer database, 201: Case file database, Ab: AC bus, Db: DC bus, F: utilization equipment, M: thermoelectric equipment, M120a: waste heat boiler, M190: power storage equipment, M190a: bidirectional DC-AC converter, M1101: power conditioner, M1102: DC-DC converter

Claims

1. A simulation system for a heat and power supply facility, in which a plurality of heat and power supply devices are connected, at least electric power and fuel (hereinafter referred to as "supply energy") are supplied, and at least two of electric power, low-temperature chilled water, chilled water, hot water, hot water, high-pressure steam, and low-pressure steam (hereinafter referred to as "composite total energy") are produced and supplied to utilization facilities, is provided, the simulation system determining the relationship between the operating conditions of the heat and power supply devices and the amount of supplied energy used or the amount of produced composite total energy, the thermoelectric device includes at least a solar power generation device, a power storage device, and a thermoelectric device including at least a pump using a motor, and does not include any power generation device other than the power storage device; an energy load setting unit that sets the amount of composite total energy required by the utilization equipment for each time period on a daily basis; a process condition setting unit that sets process conditions including at least one of an outside air temperature or a wet-bulb temperature of the heat and power generation facility and the utilization facility, and an amount of solar radiation on a horizontal surface of the photovoltaic power generation device; an operation condition setting unit that sets whether or not each of the heat and power generation devices is operable and sets an operation priority for each of the heat and power generation devices for each time period; a calculation unit that calculates at least a usage amount of the supply energy as a result of operating the heat and power supply equipment in accordance with the operating conditions of the operating condition setting unit, the operating condition setting unit further includes a power storage condition setting unit that sets a configuration and charge / discharge conditions of the power storage device, and a photovoltaic power generation output condition setting unit that sets an output efficiency of the photovoltaic power generation device and sets output control of the photovoltaic power generation device to continuous control, any one of the thermoelectric devices excluding the solar power generation device and the power storage device includes a partial load characteristic that varies depending on the process condition; the photovoltaic power generation device has output characteristics that vary depending on an amount of inclined solar radiation based on the amount of solar radiation on a horizontal surface, an outside air temperature, and a wind speed, which are among the process conditions; The calculation unit a calculation of the amount of electric power used by the heat and power supply facility by changing the load factor of the heat and power supply device in accordance with the output fluctuation of the photovoltaic power generation device and the charge and discharge conditions of the power storage device under the continuous control so that the amount of production of any one of the combined total energies becomes the target value set by the energy load setting unit, and determining the charge and discharge amounts of the power storage device for each time period such that the total daily charge amount of the power storage device and the total daily discharge amount of the power storage device are equal and the balance of electric energy can be maintained; Adding the obtained charge amount to the amount of electric energy used for each time period; A simulation system for heat and power generation facilities that simulates an electric power load by making up for the shortage in the calculated amount of electric energy usage with purchased electric power.

2. 2. The simulation system for a heat and power supply facility according to claim 1, wherein the charge and discharge conditions include at least an operation method of the power storage device, a charging schedule for the power storage device, and an upper limit value of received power, and the operation method selects peak cut operation that limits the amount of purchased power so that the received power does not exceed the upper limit value, and the calculation unit determines the amount of power that exceeds the upper limit value as the discharge amount of the power storage device, and calculates the charge amount for each time period excluding the time period during which the power storage device discharges based on the discharge amount.

3. 3. The simulation system for heat and power supply equipment according to claim 2, wherein the charging schedule includes a charging start time of the power storage device and a maximum possible charging amount per time period, and the calculation unit determines a charging end time of the power storage device based on the total discharge amount in one day and the maximum possible charging amount, and calculates a final charging amount for a time period including the charging end time.

4. 3. The simulation system for heat and power supply equipment according to claim 2, wherein the charging schedule includes a charging start time, a charging end time, and a charge amount for each time period between these times, and the calculation unit calculates the charge amount for the charging end time of the power storage device or at least one of the time periods based on the total discharge amount for one day and the charge amount for each time period.

5. 2. The simulation system for heat and power generation equipment according to claim 1, wherein the charge and discharge conditions include at least an operation method of the power storage device, a discharge time period of the power storage device, a maximum possible discharge amount for each of the discharge time periods, and a charge schedule for the power storage device, the operation condition setting unit sets the power storage device for a time period that includes at least the discharge time periods, the operation method selects a scheduled discharge for discharging from the power storage device based on the discharge time periods and the discharge amount, and the calculation unit calculates the charge amount of the power storage device for each time period excluding the discharge time periods based on the charge schedule.

6. The simulation system for a heat and power supply facility according to claim 1 , wherein the combined total energy is calculated in the following order: steam energy before electric power energy, and other energies before the steam energy.

7. The simulation system for a heat and power facility according to any one of claims 1 to 6, wherein the photovoltaic power generation output condition setting unit further has a connection state selection unit that selects either AC connection or DC connection for connection between the photovoltaic power generation device and the power storage device, and when DC connection is selected, the output efficiency of the photovoltaic power generation device is set to 1.

8. The simulation system for heat and power facilities according to any one of claims 1 to 6, wherein the storage condition setting unit is capable of setting the configuration of the storage devices by dividing them into two series, and the calculation unit regards the storage devices of the two series as one storage device, in which the charge and discharge amounts are distributed so that the state of charge (SOC) of the storage devices of each series is equal.

9. 9. The simulation system for a heat and power facility according to claim 8, wherein, when the conversion efficiencies of the DC / AC converters connected to the storage devices of each series are different, the calculation unit calculates an overall efficiency of the two series of storage devices as a whole during charging and discharging, and regards the two series of storage devices as a whole as a single storage device using the calculated overall efficiencies during charging and discharging.

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