Solar network power station system and application method thereof

Abstract

Provided are a solar network power plant system and a method for operating the same, with which it is possible to more accurately and appropriately discharge and output electric power accumulated in a virtually integrated solar network power plant to a power transmission grid at any time and at any amount of electric power, and a method for operating the solar network power plant system. A solar network power plant system is configured in such a manner that a solar battery unit (10) is provided as a terminal unit, an external management computer (70) manages the unit unit, and an information network is provided. A computing device of an external management computer (70) can access the identification information added to the communication control device (35), the unique information of each solar battery unit (10), the power storage information of each solar battery unit (10), and the power demand information. The external management computer (70) plans and controls discharge output for the solar battery unit (10) on the basis of the identification information, the unique information, the power storage information, and the power demand information.

Description

Technical Field

[0001] The present invention relates to a solar energy network power station system and an operation method thereof, wherein the solar energy network power station system is configured such that, in each of a plurality of solar energy power stations, as a unit unit for performing solar energy power generation and power storage at the end and a unit unit connected to a power transmission network via a power conditioner, a solar energy storage battery unit having a power generation unit generating power from solar energy, a storage battery capable of automatically charging with the power generated by the power generation unit, and a communication control device equipped with a discharge output from the storage battery capable of controlling the discharge output from the storage battery according to an instruction from the outside is provided, and the plurality of solar energy storage battery units are connected to an external management computer via a communication network through each of the communication control devices, thereby being virtually integrated as a solar energy network power station and managed by the external management computer. Background Art

[0002] In the conventional solar power plant 100, Figure 5 As shown, there are power generation units 20 provided by connecting a plurality of solar power generation panels 21 in series and a power conditioner 40 connecting a plurality of the power generation units 20 in parallel, and the power conditioner 40 is connected to a power company 50 .

[0003] That is, regarding the basic structure of the solar power plant 100, first, a plurality of solar power generation panels 21 are connected in series to form a power generation unit 20 of one circuit so as to have a voltage suitable for the receiving voltage of the power conditioner 40. In addition, a plurality of circuits of the power generation unit 20 are connected in parallel in the power conditioner 40 to form a system of power conditioners 40 of one system. Furthermore, the power generation output of the solar power plant 100 is obtained by connecting the outputs of the power conditioners 40 in parallel to form the total.

[0004] A specific example of a conventional solar power plant will be described.

[0005] A general solar power generation panel 21 generates a DC power with a normal output of 300W, a maximum output voltage of 40V, a normal power generation voltage of 30V, and a normal power generation current of 10A. The power generation unit 20 is formed by connecting 7 solar power generation panels 21 in series, and is connected to the power conditioner 40 with a maximum output voltage of 280V, a normal power generation voltage of 210V, a normal power generation current of 10A, and a system power generation power of 2100W (2.1kW). In addition, the basic structure of this system is roughly standardized in any of small to large solar power plants. The number of systems is adjusted to match the output of the power generation unit 20 and connected to the power conditioner 40. For example, if it is a 5kw power conditioner 40, a 2.1kW solar power generation panel system (power generation unit 20) is connected in parallel with 3 systems. If it is 50kW, 30 systems are connected, and if it is a 1000kW power plant of a large solar power plant, 600 systems are connected. Furthermore, the power conditioner 40 has a characteristic of automatically outputting AC power in proportion to the DC input power from the solar power generation panel system.

[0006] In addition, mainly as a solar power storage device for household use, a storage and discharge device for solar power generation is disclosed, which has: a DC input terminal from a solar panel, a DC output terminal to a power conditioner (a device that converts a DC power supply into a commercial AC power supply), and a connection terminal for a signal line from a power sensor, a control panel with a circuit for controlling the storage of power in a battery and the DC output to the power conditioner according to the signal of the power sensor is fixed to the exterior of the battery, and the battery connection terminal of the control panel is connected to the battery to form an integrated circuit (refer to patent document 1). Thus, a storage and discharge device for solar power generation can be provided, which can store the surplus power of solar power generation, and the stored power can be consumed by individuals, which can significantly reduce the purchase price of electricity for households.

[0007] In addition, a network system of solar cell charging units is disclosed, which has: a plurality of solar cell charging units in a building, each of which has a solar cell module, a storage battery for storing power generated by the solar cell module, and a charger for supplying charging power to an electric vehicle; and a management device, which is configured to be able to communicate with the plurality of solar cell charging units via the Internet (see Patent Document 2). Thus, a network system of solar cell charging units can be provided, which makes charging stations using solar power generation popular, and allows electric vehicles and the like to be charged even at an outing destination.

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: Japanese Utility Model Registration No. 3223017 (page 1)

[0011] Patent Document 2: Japanese Patent Application Laid-Open No. 2021-97558 (first page) Summary of the invention

[0012] Problems to be solved by the invention

[0013] According to the national FIT system (fixed price purchase system for renewable energy) newly established after 2012, the entire amount of solar-generated electricity is sold to power companies at the same time as power is generated. As it becomes more popular, the amount of electricity generated increases, and there is excess power generated during the day, which leads to social problems such as power shortages during the evening and night time periods. In contrast, in order to prevent excess power, the current situation is that solar power plants are required to stop power generation during the day and install power generation stop devices to stop power generation. Therefore, power generation operators suffer economic losses due to the loss of power generation energy during power generation stop, and the society as a whole has problems such as power shortages outside the time period of excess power generation during the day.

[0014] Therefore, an object of the present invention is to provide a solar network power station system and an operation method thereof, which can discharge and output the power stored in a virtually integrated solar network power station to a power transmission grid more accurately and appropriately at any time and with any power amount without stopping solar power generation.

[0015] Means for solving problems

[0016] In order to achieve the above object, the present invention has the following structure.

[0017] According to one mode of the solar network power station system of the present invention, a solar network power station system is formed by connecting a plurality of solar power stations through a power transmission network, characterized in that, in each of the plurality of solar power stations, a unit unit as a terminal for performing solar power generation and power storage and a unit unit connected to the power transmission network via a power conditioner, is composed of a solar battery unit having a power generation unit that generates power from solar energy, a battery that can automatically charge the power generated by the power generation unit, and a communication control device that is equipped to control the discharge output from the battery according to instructions from the outside, and the plurality of solar battery units are connected to an external management computer through each of the communication control devices via a communication network different from a network connected to the power company via a calibration power meter, thereby being virtually integrated into a solar network power station, which is managed by the external management computer, and an information network is set up so that the external The external management computer is capable of accessing the following information: identification information, which is attached to the communication control device in a manner to identify each of the solar battery cells; inherent information, which includes at least information related to the installation location of each of the solar battery cells and is associated with the identification information; power storage information, which includes at least information related to the amount of stored electricity of each of the solar battery cells and is variable information associated with the identification information; and power demand information, which is external information related to the demand for electricity and is variable information. The external management computer prepares a discharge output plan according to the solar battery cells based on the identification information, the inherent information, the power storage information and the power demand information, and controls the discharge output according to the solar battery cells so that the power stored in the solar network power station can be discharged and output to the power transmission network at any time and with any amount of electricity.

[0018] According to one aspect of the solar power station network system of the present invention, the power storage information includes information on the amount of stored power estimated by measuring the voltage of the storage battery.

[0019] In addition, according to one mode of the solar network power station system of the present invention, it is characterized in that the solar battery unit is composed of the following parts: the power generation unit; the battery, which charges the power generated by the power generation unit via the charging circuit and discharges the power generated by the power generation unit via the discharging circuit; the power storage information acquisition unit, which is configured to acquire power storage information by being connected to the battery; and the communication control device, which receives instructions from the external management computer to control the discharge circuit so that the power storage information can be sent to the outside and the discharge output from the battery can be controlled. The battery, the charging circuit, the discharging circuit, the power storage information acquisition unit and the communication control device are integrally unitized to form a battery unit connected between the power generation unit and the power conditioner.

[0020] In addition, according to one mode of the solar network power station system of the present invention, the information network is set in a manner so that the external management computer can access information on the output power amount that can be obtained by measuring the output voltage and output current of the battery over time, which is the information on the discharge output of each of the solar battery units.

[0021] In addition, according to one aspect of the method for operating the solar network power station system of the present invention, the method for operating the solar network power station system through the control of the external management computer is characterized in that it includes: a step of grasping the amount of stored electricity by the external management computer based on the storage information from each of the solar battery cells; a step of grasping the power demand predicted based on the power demand information by the external management computer; a step of making a related discharge output plan according to the identification information, the inherent information, the storage information and the power demand information as a power supply plan for supplying power from the solar network power station to the power transmission network by the external management computer; and a step of performing discharge output according to the solar battery cell according to the instruction from the external management computer based on the discharge output plan.

[0022] In addition, according to one mode of the method for operating the solar network power station system of the present invention, it is characterized in that it includes the following steps: the external management computer compares the information of the estimated output power estimated based on the planned information of the discharge output planned by the solar battery unit with the information of the output power discharged and output to the power transmission network by controlling the discharge output of the solar battery unit, thereby grasping the operating status of each of the solar battery units, and the external management computer corrects the plan and control related to the discharge output of each of the solar battery units, wherein the information of the output power discharged and output to the power transmission network is information that can be obtained by measuring the output voltage and output current of the battery over time.

[0023] In addition, one aspect of the method for operating the solar network power station system according to the present invention is characterized in that it includes the following steps: the external management computer compares the information on the amount of power supplied from the solar power station to the power transmission network as measured by a calibration power meter installed at the solar power station with the information on the estimated amount of power supplied by the solar power station as estimated by accumulating information on the output power from each of the solar storage battery units, thereby understanding the operating status of the solar power station, and correcting the plan and control related to the discharge output of each of the solar storage battery units through the external management computer.

[0024] Effects of the Invention

[0025] According to the solar network power station system and its operation method of the present invention, the following particularly advantageous effect is obtained: without stopping solar power generation, the power stored in the virtually integrated solar network power station can be discharged and output to the power transmission network more accurately and appropriately at any time and with any power amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram for explaining an embodiment of the solar power station system according to the present invention.

[0027] Figure 2 This is an explanatory diagram for explaining access to information in an application example of the solar power station network system according to the present invention.

[0028] Figure 3 Yes means Figure 1 Single-line wiring diagrams of various solar power station examples.

[0029] Figure 4 Yes means Figure 1 A single-line wiring diagram of an example of each battery unit in an example of the embodiment.

[0030] Figure 5 This is a single-line wiring diagram showing an example of a conventional solar power plant system. DETAILED DESCRIPTION

[0031] Below, according to the accompanying drawings ( Figures 1 to 4 ) The solar energy network power station system and its application method of the present invention are described in detail.

[0032] In the solar network power station system of the present invention, if Figures 1 to 4 As shown, in each of the plurality of solar power plants 100, a solar battery unit 10 is provided as a unit unit for performing solar power generation and power storage at the end and a unit unit connected to the power transmission grid 55 via a power conditioner 40. The solar battery unit 10 includes: a power generation unit 20 that generates power from solar energy; a storage battery 31 (see Figure 4 ), which can automatically charge the power generated by the power generation unit 20; and the communication control device 35 (refer to Figure 4 ) is equipped to be able to control the discharge output from the battery 31 according to instructions from the outside.

[0033] In addition, the solar network power station system is constructed in the following manner: unlike the network connected to the power company via a calibrated power meter, the multiple solar battery units 10 are connected to an external management computer 70 via a communication network (such as the Internet 60) through each communication control device 35, thereby being virtually integrated into a solar network power station and managed by the external management computer 70.

[0034] Furthermore, in the solar network power station system of the present invention, an information network is provided so that a computing device of an external management computer 70 or the like can access the following information for information processing: identification information, which is attached to the communication control device 35 in a manner to identify each solar battery unit 10; inherent information, which includes at least information related to the installation location of each solar battery unit 10 and is associated with the identification information; power storage information, which includes at least information related to the stored power amount of each solar battery unit 10 and is variable information associated with the identification information; and power demand information, which is external information related to power demand and is variable information.

[0035] Furthermore, in the present invention, regarding the solar network power station system, the external management computer 70 makes a discharge output plan for the solar battery unit 10 based on the identification information, the inherent information, the power storage information, and the power demand information, and controls the discharge output for the solar battery unit 10 so that the power stored in the solar network power station can be discharged and output to the power transmission grid 55 at any time and with any power amount. In addition, the information processing of the present invention can of course also be performed by using cloud computing, distributed information processing (information processing of multiple servers), etc.

[0036] As a result, the following particularly advantageous effects are achieved: the virtually integrated solar power grid can be rationally managed, the solar power grid 100 can be used without stopping and without waste, and the power stored in the solar power grid can be discharged and output to the power grid more accurately and appropriately at any time and with any amount of power. In addition, each solar battery unit 10 is managed individually, so that the power generation performance, the reduction of battery performance, and equipment failure can be grasped in the smallest unit, and the problem can be grasped and dealt with without stopping the entire solar power grid 100.

[0037] The identification information of the present invention refers to identification means such as an identification code that is given so as to be manageable by the external management computer 70. As the identification code, for example, in addition to being able to use an identification number consisting of only numerals, it is of course possible to use characters, symbols, etc.

[0038] The inherent information of the present invention is fixed information and can include individual information of the solar power generation panel 21 (the form of the power generation device constituting the power generation unit 20 , etc.) and the battery 31 that have deteriorated over time, in addition to information on the installation location such as location information.

[0039] In addition, the power storage information of the present invention may include, for example, information on the power storage amount estimated by measuring the voltage of the battery 31, information on the power storage amount predicted by region (by solar power station 100) based on meteorological conditions, and other information for grasping the changing power storage status in each solar battery unit 10.

[0040] Furthermore, the power demand information of the present invention can include fluctuation information such as the market price of power outside the FIT system determined by JEPX (Japan Electric Power Wholesale Exchange) and demand forecasts that vary by region due to meteorological conditions.

[0041] Furthermore, this information can be used, for example, to determine the priority of the solar battery cells 10 for discharging output, or to select or exclude the solar battery cells 10 for discharging output according to a specific time or region. For example, the operation of the solar network power station system can be optimized by controlling the solar battery cells 10 close to places with high power demand to discharge first, or by controlling the solar battery cells 10 with high stored power to discharge first.

[0042] In addition, in this embodiment, the information network can be set up in such a manner that the external management computer 70 can access the information of the output power amount that can be obtained by measuring the output voltage and output current of the storage battery 31 over time as the information of the discharge output of each solar battery unit 10. As a result, as described later, the operating status of the solar network power station system can be appropriately grasped, and its operation can be appropriately corrected and optimized.

[0043] Next, according to Figure 2 The above-mentioned embodiment of the method for operating the solar power plant system is described. In the embodiment of the method, the solar power plant system is operated by the control of the external management computer 70, and includes the steps of grasping the amount of stored power (step 1), grasping the amount of power demand (step 2), making a plan for discharge output (step 3), performing discharge output (step 4), and comparing the discharge output. In addition, the step of comparing the discharge output may include: comparing the planned information of the output power of each solar battery unit 10 with the information of the output power of each solar battery unit 10 (step 5), and comparing the information of the estimated power supply of the solar power plant 100 accumulated based on the information of the output power of each solar battery unit 10 with the information of the power supply measured by the test power meter 45 installed in the solar power plant 100 (step 6).

[0044] In the step of grasping the amount of stored electricity (step 1), the amount of stored electricity is grasped by the external management computer 70 based on the storage information from each solar battery unit 10. As a result, the overall amount of stored electricity of the solar power station can be grasped, and the amount of stored electricity of each solar battery unit 10, which is the unit unit at the end of solar power generation and storage, can be grasped, so that the power supply to the power transmission network 55 can be managed in the most efficient manner. For example, the grasp (monitoring) of the amount of stored electricity can be performed by the external management computer 70 through data (voltage, current data, etc.) intermittently sent (transmitted) from the communication control device 35 at set time intervals.

[0045] In the step of grasping the power demand (step 2), the power demand predicted based on the power demand information of JEPX (Japan Electric Power Wholesale Exchange) is grasped, for example, by the external management computer 70. Thus, for example, when the power demand is larger than the stored power, the discharge output can be performed from all the solar battery units 10 in such a manner that the entire stored power of the entire solar power plant is supplied to the power transmission grid 55. In addition, when the power demand is smaller than the stored power, for example, management can be performed in such a manner that the priority of the discharge output is determined for each solar battery unit 10 as described above.

[0046] In the step of preparing a discharge output plan (step 3), the external management computer 70 prepares a discharge output plan for each solar battery unit 10 based on the identification information, the inherent information, the power storage information, and the power demand information as a power supply plan for supplying power from the solar power plant to the power transmission grid 55. This makes it possible to prepare a more accurate and appropriate discharge output plan.

[0047] Then, in the step of discharging and outputting (step 4), according to the plan of discharging and outputting, the solar battery unit 10 performs discharging and outputting according to the instruction from the external management computer 70. Thus, the power stored in the solar power generation station can be discharged and outputted to the power transmission network more accurately and appropriately at any time and with any power amount.

[0048] In addition, in this embodiment, Figure 2 As shown, the following steps (step 5) can be included: by comparing the information of the estimated output power estimated based on the planned discharge output information of the solar battery unit 10 by the external management computer 70 with the information of the output power discharged and output to the power transmission network 55 by controlling the discharge output of the solar battery unit 10, which can be obtained by measuring the output voltage and output current of the storage battery 31 over time, the operation status of each solar battery unit 10 is grasped, and the plan and control related to the discharge output of each solar battery unit 100 are corrected by the external management computer 70. As a result, the control of discharging and outputting the power stored in the solar power station to the power transmission network 55 at an arbitrary time and with an arbitrary power amount can be fed back (step 7), and each solar power station 100 and each solar battery unit 10 can be managed more accurately and appropriately.

[0049] Furthermore, in this embodiment, Figure 2As shown, the following steps can be included (step 6): the operation status of the solar power station 100 is understood by comparing the information of the power supply amount output from the solar power station 100 to the power transmission network 55, which is measured by the verification power meter 45 installed in the solar power station 100 and sent to the external management computer 70 via the network of the power company 50, and the information of the estimated power supply amount of the solar power station estimated by accumulating the information of the output power amount from each solar storage battery unit 10, and the plan and control related to the discharge output of each of the above-mentioned solar storage battery units are corrected by the external management computer. As a result, the control of discharging and outputting the power stored in the solar power station to the power transmission network 55 can also be fed back (step 7), and each solar power station 100 and each solar storage battery unit 10 can be managed more accurately and appropriately.

[0050] In addition, in this embodiment, Figure 2 As shown, the step of storing the power generation data for which the power generation data is compared in steps 5 and 6 can be included (step 8). The power generation data is used as information for AI learning, and the information obtained by the AI ​​learning can be used to more appropriately control the operation of each solar battery unit 10, each solar power station 100, and the solar network power station.

[0051] In addition, Figure 3 In the solar power plant 100 of the embodiment shown in the figure, a storage battery unit 30 including a storage battery 31 and a communication control device 35 is connected between the power generation unit 20 and the power conditioner 40 (see Figure 4 ), thereby, the solar battery unit 10 is provided by the power generation unit 20 and the battery unit 30. According to the battery unit 30, it is possible to manage by the external management computer 70 so that the power generated by the power generation unit 20 can be charged and the stored power can be discharged to the power conditioner 40 at will (refer to Figure 2 ). In addition, according to the battery unit 30, it is sufficient to simply connect it between the power generation unit 20 and the power conditioner 40, and the power for operating the battery unit 30 (communication control device 35, etc.) can also be provided by the power of the power generation unit 20.

[0052] Here, according to Figure 3When describing a specific structural example of the solar power station 100, seven 300W solar panels 21 are used to form a 2.1kW, 280V DC voltage, 7.5A DC current power generation circuit (power generation unit 20). The three circuits of the power generation unit 20 are connected in parallel with the power conditioner 40 to form a 5kW power regulation system. Furthermore, the battery units 30 are connected to the power generation units 20 of the three circuits respectively. In addition, in order to charge most of the power generated during the day, each battery unit 30 can have a 10kWh battery 31 (refer to Figure 4 ).

[0053] In addition, Figure 4 In the battery unit 30 of the example shown, a charging circuit 32 is provided, a battery 31 that automatically charges the entire amount of power generated by the power generation unit 20 through the charging circuit 32, a discharge circuit 33 that discharges the power stored in the battery 31 to the power conditioner 40, and a communication control device 35 for remotely operating the discharge circuit 33. Furthermore, it can be configured as follows: a voltmeter (not shown) for measuring voltage in order to grasp the amount of stored power, and an ammeter (not shown) for measuring output current for calculating the amount of power together with the output voltage measured by the voltmeter are connected to the battery 31, and the communication control device 35 is connected in such a manner that the voltage of the stored power, the output voltage information, and the output current information can be communicated to the external management computer 70. That is, in Figure 4 In the embodiment shown, the solar battery unit 10 is composed of the following parts: a power generation unit 20; a battery 31 that charges the power generated by the power generation unit 20 via a charging circuit 32 and discharges the power generated by the power generation unit 20 via a discharging circuit 33; a power storage information acquisition unit that is connected to the battery 31 and configured to acquire power storage information; and a communication control device 35 that receives an instruction from an external management computer 70 to control the discharging circuit 33 so that the power storage information can be sent to the outside and the discharge output from the battery 31 can be controlled. The battery unit 30 connected between the power generation unit 20 and the power conditioner 40 is formed by integrally having the battery 31, the charging circuit 32, the discharging circuit 33, the power storage information acquisition unit, and the communication control device 35. In addition, the power storage information acquisition unit of this embodiment can be composed of the above-mentioned voltmeter, ammeter, etc.

[0054] Thus, for example, all of the electricity generated by solar energy can be stored in the storage battery 31, and although it varies depending on the season, for example, at around 3 p.m., the approximate storage amount of the day can be known by the solar storage battery unit 10. Accordingly, for example, in contrast to the decrease in solar power generation, the selected multiple (majority) solar storage battery units 10 are individually controlled to match the expected increase in power demand from around 5 p.m., thereby enabling the solar network power station system to freely release the required amount of electricity in the required time period. Thus, there is no need to stop the power generation of the solar power station to prevent excess power during the day, and solar energy can be effectively utilized. In addition, this method example is a power generation system that is conceived on the principle of selling all of the generated electricity, but of course, the use of the electricity, such as personal consumption of electricity to operate the system, can be appropriately set. In addition, the present embodiment is a power generation system conceived on the principle that all of the generated power is used to charge the battery 31, but is not limited to this. A circuit may be added so that all of the generated power is directly sent from the power generation unit 20 to the power conditioner 40 and supplied to the power transmission network 55 depending on a portion of the generated power or a time period.

[0055] In addition, a plurality of solar battery units 10 composed of power generation units 20 and battery units 30 are provided, but the solar battery units 10 can be manufactured at low cost by mass production, and the equipment cost (initial cost) of the solar network power station system can be reduced. In addition, the battery units 30 are provided for each power generation unit 20, so they can be dispersedly provided in the solar power station 100, which has the advantage of not requiring a new space. That is, for example, by storing the battery units 30 in a box that can be waterproofed to improve durability, they can be dispersedly arranged outdoors corresponding to each power generation unit 20.

[0056] In addition, there are many manufacturers of power generation units 20 (such as solar power generation panels 21) and power conditioners 40, but the basic specifications of the power generation circuits are the same. Therefore, when the power generation unit 20 that has already been installed is installed and the storage battery unit 30 is connected, the storage battery unit 30 can also be standardized and can be easily installed in the existing solar power station 100. Therefore, the storage battery unit 30 can be mass-produced and the cost can be reduced.

[0057] The information network of this embodiment uses the Internet 60 as a communication network, and a wireless LAN (Local Area Network) can be used in each solar power station 100. By using a general-purpose Wi-Fi as the wireless LAN, it can be easily and inexpensively installed. In addition, as a communication means, of course, a mobile phone line, Bluetooth, etc. can also be used in addition to the above.

[0058] The present invention relates to a power station system related to solar power generation. Of course, in addition to the above-described structure, a power generation system using other natural energy sources such as wind power and water power can also be added. In addition, a control / management system can also be added so that the surplus power of commercial power generated by the base load power supply, etc., can be charged and discharged through the storage battery 31 in accordance with the predicted power demand.

[0059] As mentioned above, although the present invention has been described in various ways by giving examples of preferred embodiments, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

[0060] Explanation of symbols

[0061] 10 Solar battery unit

[0062] 20 Power generation unit

[0063] 21 Solar panels

[0064] 30 battery cells

[0065] 31. Battery

[0066] 32 Charging Circuit

[0067] 33 Discharge circuit

[0068] 35 Communication control device

[0069] 40 Power Regulator

[0070] 45 Calibration of electric power meter

[0071] 50 Power Company

[0072] 55 Transmission grid

[0073] 60 Internet

[0074] 70 External management computer

[0075] 100 Solar power stations.

Claims

1. A solar power network system, comprising a plurality of solar power stations connected to a power transmission network, characterized in that: In each of the plurality of solar power plants, a unit unit as a terminal unit for performing solar power generation and power storage and a unit unit connected to the power transmission network via a power conditioner is constituted by a solar battery unit having a power generation unit for generating power from solar energy, a battery capable of automatically charging the power generated by the power generation unit, and a communication control device equipped to control the discharge output from the battery according to an instruction from the outside, The solar network power station system is constituted by connecting a plurality of solar battery units to an external management computer via a communication network through each of the communication control devices, thereby virtually integrating into a solar network power station and being managed by the external management computer, wherein the communication network is different from a network connected to a power company via a calibration power meter, The solar network power station system is provided with an information network so that the external management computer can access the following information: Identification information, which is attached to the communication control device in a manner to identify each of the solar battery units; Unique information including at least information related to the installation location of each solar battery unit and associated with the identification information; power storage information including information related to at least the amount of stored power of each of the solar battery cells, and being change information associated with the identification information; and Electricity demand information is external information related to electricity demand and is variable information. The external management computer prepares a discharge output plan according to the solar battery unit based on the identification information, the inherent information, the power storage information and the power demand information, and controls the discharge output according to the solar battery unit, so that the power stored in the solar network power station can be discharged and output to the power transmission network at any time and with any power amount.

2. The solar network power station system according to claim 1, characterized in that: The power storage information includes information on the amount of stored power estimated by measuring the voltage of the storage battery.

3. The solar network power station system according to claim 1, characterized in that: The information network is provided so that the external management computer can access information on the amount of output power obtainable by measuring the output voltage and output current of the battery over time, which is information on the discharge output of each of the solar battery cells.

4. A method for using a solar energy network power station system, which uses the solar energy network power station system according to any one of claims 1 to 3 under the control of an external management computer, characterized in that: The following steps are included: The external management computer grasps the amount of stored electricity based on the stored electricity information from each of the solar storage battery units; grasping the power demand predicted based on the power demand information by the external management computer; The external management computer prepares a discharge output plan for each solar battery unit based on the identification information, the inherent information, the power storage information, and the power demand information as a power supply plan for supplying power from the solar power plant to the power transmission network; as well as According to the discharge output plan, the solar battery unit performs discharge output according to the instruction from the external management computer.

5. The method for using the solar network power station system according to claim 4, characterized in that: The operation method includes the following steps: the external management computer compares the information of the estimated output power estimated based on the planned discharge output according to the solar battery unit with the information of the output power discharged to the power transmission network by controlling the discharge output according to the solar battery unit, thereby grasping the operating status of each of the solar battery units, and the external management computer corrects the plan and control related to the discharge output of each solar battery unit, wherein the information of the output power discharged to the power transmission network is information that can be obtained by measuring the output voltage and output current of the battery over time.

6. The method for using the solar network power station system according to claim 5, characterized in that: The operation method includes the following steps: the external management computer compares the information on the amount of power supplied from the solar power station to the power transmission network obtained by measuring with a calibration power meter installed at the solar power station with the information on the estimated amount of power supplied by the solar power station estimated by accumulating the information on the output power from each of the solar battery cells, thereby obtaining the operating status of the solar power station, and the external management computer corrects the plan and control related to the discharge output of each of the solar battery cells.

7. The solar network power station system according to claim 1, characterized in that: The solar battery unit is composed of the following parts: The power generation unit; The storage battery is charged with the power generated by the power generation unit via a charging circuit and discharged with the power generated by the power generation unit via a discharging circuit; a power storage information acquisition unit configured to acquire power storage information by being connected to the storage battery; and the communication control device receives an instruction from the external management computer to control the discharge circuit so that the power storage information can be sent to the outside and the discharge output from the storage battery can be controlled, The storage battery, the charging circuit, the discharging circuit, the power storage information acquisition unit, and the communication control device are integrally formed into a unit, thereby constituting a storage battery unit connected between the power generation unit and the power conditioner.

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