New energy comprehensive energy supply system configuration and scheduling method

Abstract

The invention relates to a new energy comprehensive energy supply system configuration and scheduling method, and belongs to the field of new energy, and the method comprises the steps: collecting the meteorological resource data of a designated region according to a preset time resolution; calculating an ideal output condition of each energy source in the energy supply station by taking the installed capacity of each energy source in the energy supply station as an input variable; collecting, analyzing and processing user load and power grid consumption information to form a continuous load curve and a continuous consumption curve; formulating an energy supply station internal operation principle, and formulating an energy supply station operation scheduling mode with energy storage in combination with an energy storage system; based on an operation principle and an operation scheduling mode in the energy supply station, energy storage capacity is integrated to compile energy supply station coupling operation logic, and actual comprehensive output of the energy supply station is calculated; and according to the configuration and the actual comprehensive output, calculating an energy supply station preferential index, and then determining an optimal system configuration and scheduling method of the energy supply station according to the preferential index. According to the method, energy waste can be reduced, stable overall output of the energy supply station is ensured, and the electric energy quality is high.

Description

Technical Field

[0001] The present invention belongs to the field of new energy, and in particular relates to a configuration and scheduling method for a new energy comprehensive energy supply system. Background Art

[0002] Solar thermal power generation (hereinafter referred to as CSP) is a renewable clean energy generation technology that collects and uses solar thermal energy to generate steam to drive steam turbine generator sets to generate electricity. It has all the characteristics of traditional steam turbine power generation. The main advantages of CSP are the cleanliness and renewability of its energy, as well as its excellent compatibility with large-scale thermal energy storage technology, which brings about its energy storage and peak-shaving capabilities.

[0003] Solar thermal power generation is an emerging new energy power generation technology. At present, the main application scenarios of solar thermal power generation in China are concentrated on the construction of new energy integrated energy supply stations. In recent years, new energy sources, mainly photovoltaic and wind power, have developed rapidly, the cost of power generation has continued to decline, and the proportion of installed capacity and power generation has increased rapidly. In order to solve the problems of strong volatility of the output of such new energy sources, great impact on the stability of the power grid, and waste caused by "abandoning wind" and "abandoning light", it is required that newly built large-scale photovoltaic and wind power projects must be equipped with a certain capacity of solar thermal power generation to form a new energy integrated energy supply station with solar thermal as the main body. With the large-scale heat storage capacity of solar thermal power generation in the station and steam turbine generator sets, the overall output of the energy supply station is stabilized, the quality of electricity is improved, and it is easier to be absorbed by the power grid. In addition, the new energy integrated energy supply station with solar thermal as the main body has high reliability in isolated grid operation and has the ability to cogenerate heat and power, which is very suitable for industrial bases or parks with poor energy conditions.

[0004] Compared with the photovoltaic and wind power industries, the solar thermal industry supply chain is not yet mature. At this stage, the construction investment is high, and the power generation cost is several times that of photovoltaic and wind power. In order to ensure the overall rate of return of new energy integrated energy supply stations, such projects usually:

[0005] (1) Configure photovoltaic and wind power with larger capacity, and only configure solar thermal power generation with smaller capacity (usually including installed capacity, collector field scale, heat storage capacity, etc.);

[0006] (2) Load or consumption constraints are rarely considered when calculating power generation;

[0007] (3) The operation and scheduling method is simple. Most of the energy sources in the station operate independently or only perform simple scheduling, which makes it easy to calculate the power generation and then evaluate the overall benefits of the energy supply station.

[0008] Existing technologies optimize the capacity of photovoltaic + solar thermal power generation systems from the perspective of grid response, but they do not take solar thermal and energy storage as the main body and consider the positive effects of their operation and scheduling on the system. Existing technologies coordinate and optimize the energy storage capacity for wind, solar, hydrogen storage and multi-energy complementary power generation systems, but on the one hand, they focus on hydrogen storage rather than solar thermal, and have different technical routes. On the other hand, they focus on optimizing energy storage capacity, while ignoring the fact that the scale of wind, light, and especially solar thermal itself is also an important factor affecting the overall benefits. In other words, there is currently a lack of a system configuration and scheduling method for new energy integrated energy supply stations with solar thermal power stations as the main body.

[0009] The lack of scientific and efficient methods for the configuration and dispatch of new energy integrated energy supply stations with CSP power stations as the main body will lead to:

[0010] (1) The proportion of CSP in energy supply stations is unreasonable. On the one hand, in addition to reducing costs through technological development and supply chain development, CSP can also effectively reduce CSP costs by increasing construction scale. Unscientifically reducing the scale of CSP is not conducive to controlling CSP costs. On the other hand, too small CSP capacity will also result in CSP failing to play the expected role of peak shaving and valley filling and stabilizing output in energy supply stations;

[0011] (2) The actual load or consumption capacity is not taken into account, and the calculation results deviate from the actual situation and cannot reflect the actual project benefits;

[0012] (3) It is impossible to accurately evaluate the benefits of energy supply stations under complex scheduling logic, which affects investment decisions. In addition, the coordination and scheduling between various energy sources within the energy supply station is insufficient, resulting in additional energy waste and reduced overall output stability and power quality. Summary of the invention

[0013] In view of the above deficiencies in the prior art, the purpose of the invention is to provide a new energy integrated energy supply system configuration and scheduling method, which can reduce energy waste and ensure the overall stable output of the energy supply station and high power quality.

[0014] The present invention proposes a new energy integrated energy supply system configuration and scheduling method, comprising:

[0015] S1, collects meteorological resource data of a specified area according to a preset time resolution;

[0016] S2, taking the installed capacity of each energy source in the energy supply station as the input variable, calculates the ideal output of each energy source in the energy supply station;

[0017] S3, collect, analyze and process user load and grid absorption information to form continuous load curve and absorption curve;

[0018] S4, formulate the operation principles within the energy supply station, and formulate the operation and dispatching mode of the energy supply station with energy storage in combination with the energy storage system;

[0019] S5, based on the operation principle and operation dispatch mode within the energy supply station, the energy storage capacity is combined to compile the energy supply station coupling operation logic and calculate the actual comprehensive output of the energy supply station;

[0020] S6, calculates the optimal index of the energy supply station according to the configuration and actual comprehensive output, and then determines the optimal system configuration and scheduling method of the energy supply station according to the optimal index.

[0021] Furthermore, in S1, the meteorological resource data include: total radiation irradiance, normal direct radiation irradiance, wind speed, wind direction, temperature, humidity, and atmospheric pressure.

[0022] Furthermore, in S2, the input variables include: the total installed capacity of photovoltaic modules, the total installed capacity of wind turbines, and the total area of ​​solar thermal power generation collector fields.

[0023] Further, the input variables are substituted into the annual typical meteorological data CD * , calculate the corresponding ideal output of each energy source with the same time resolution This group of data is recorded as Where j represents the jth group of input variables, and n represents the nth variable in each group of input variables.

[0024] Furthermore, in S3, the load curve and the consumption curve are normalized continuous data C with the same time span and time resolution as the meteorological data. * .

[0025] Furthermore, in S4, the design output curve Cd of the system under the specified energy supply station operation dispatching mode is calculated. * , where Cd * ≤C * .

[0026] Further, in S5, the operation logic includes:

[0027] Solar thermal priority output logic M0: Assume that the solar thermal system in the energy supply station operates independently, and does not consider the problem of absorption. The solar thermal heat collected is used for power generation or heating first, and the excess heat enters the heat storage system. When the energy is insufficient, the heat storage system releases heat to make up for it;

[0028] Solar thermal recovery logic M1: When photovoltaic power and wind power are abandoned in the energy supply station using solar thermal recovery, the abandoned electricity should enter the heat storage system through the electric heater and then be released through the solar thermal system;

[0029] Solar thermal output regulation logic M2: When the energy supply station is limited by its absorption capacity, the peak load of the energy station output can be reduced by adjusting the solar thermal output;

[0030] Energy supply prediction logic M3: When the energy supply station operates in an isolated grid state and supplies energy to a specific object, the operation mode of the current period is determined by predicting the energy supply situation of the energy supply station in a short period of time in the future.

[0031] Further, in S5, the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S of the energy supply station and the operation logic M are used as input variables, and the ideal output of each energy source is As a process variable, a calculation model is constructed to calculate the actual comprehensive output P of the energy supply station. j * .

[0032] Further, in S6, according to the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S and P of the energy supply station * , calculate the optimal index OP, where P * Refers to the actual comprehensive output of the corresponding energy supply station calculated based on a set of input variables.

[0033] Furthermore, the v corresponding to the optimal selection index in,1 、v in,2 ,…,v in,n , S and operation logic M, as the optimal system configuration and scheduling method for a new energy integrated energy supply station with a CSP power station as the main body.

[0034] The beneficial effects of the present invention are as follows:

[0035] (1) Scientifically configure the scale of each system in the new energy integrated energy supply station with CSP power station as the main body, so as to achieve the expected peak-shaving and valley-filling and stable output of the overall energy supply station;

[0036] (2) Based on the actual load or absorption capacity, the calculation results are closer to the actual situation, providing a more accurate and reliable reference for project decision-making;

[0037] (3) The various energy sources within the energy supply station are coupled and coordinated to achieve optimal configuration and scheduling under specified conditions, minimize energy waste, ensure the overall output of the energy supply station is stable, the power quality is high, and ensure the economic feasibility of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are only used to illustrate specific embodiments and are not considered to limit the present invention. In the entire drawings, the same reference symbols represent the same components. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0039] Figure 1 A flowchart of a new energy integrated energy supply system configuration and scheduling method according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of a scheduling method for a new energy integrated energy supply system with a solar thermal power station as the main body in isolated grid operation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0042] Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of methods and systems consistent with some aspects of the present invention as detailed in the appended claims.

[0045] The new energy comprehensive energy supply system configuration and scheduling method proposed in the present invention is a new energy comprehensive energy supply system configuration and scheduling method with a solar thermal power station as the main body. This method can optimize the energy scale configuration, energy storage capacity and operation scheduling method in a new energy comprehensive energy supply station with a solar thermal power station as the main body according to specific requirements.

[0046] like Figure 1 As shown, the present invention proposes a new energy comprehensive energy supply system configuration and scheduling method, comprising the following steps:

[0047] S1, collects meteorological resource data of the designated area according to the preset time resolution.

[0048] Specifically, according to the needs, collect the typical annual meteorological data CD of the specified area and specified time resolution. * .

[0049] The time span of the data is a whole year, and the time resolution includes: hourly, 15-minute, minute, etc.

[0050] In the embodiment of the present invention, the meteorological resource data includes: total radiation irradiance, normal direct radiation irradiance, wind speed, wind direction, temperature, humidity, atmospheric pressure, etc. It should be noted that the meteorological resource data is not limited to the above examples, and may also include other types of meteorological data.

[0051] S2, taking the installed capacity of each energy source in the energy supply station as the input variable, calculates the ideal output of each energy source in the energy supply station.

[0052] Each energy source includes, does not completely include, or not only includes wind power, photovoltaics, and solar thermal energy. There may be more or fewer other energy sources. Depending on the application scenario, there are non-fixed priorities or operation strategies between the energy sources. For example, when there are only solar thermal energy and photovoltaic energy in the system, it may be expected that solar thermal energy will reduce power generation during the day and prioritize energy storage, and then release the stored energy at night. If there are only solar thermal energy and wind power in the system, solar thermal energy may be required to flexibly adjust energy storage or output.

[0053] Ideal output refers to the output without considering load or absorption, that is, the output when the load or absorption capacity is infinite, but the necessary losses of the energy itself should be taken into account. For example, for solar thermal power generation, the ideal output refers to the heat collection when the load or absorption capacity is infinite, and factors such as cosine loss, end loss, shadow loss, and heat dissipation loss should all be taken into account.

[0054] Specifically, the input variables include: total installed capacity of photovoltaic modules, total installed capacity of wind turbines, total area of ​​solar thermal power generation collectors, etc. Input variables are substituted into the typical annual meteorological data CD * , calculate the corresponding ideal output of each energy source with the same time resolution This group of data is recorded as Where j represents the jth group of input variables, and n represents the nth variable in each group of input variables. There can be multiple groups of input variables, and the corresponding ideal output is calculated based on each group of input variables.

[0055] That is, variables that characterize the scale of an energy source, such as the total installed capacity of photovoltaic modules, the total installed capacity of wind turbines, the total area of ​​solar thermal power generation collectors, etc., are used as input variables v in,1 、v in,2 ,…,v in,n , given a set of input variable values, substitute the typical annual meteorological data CD * , according to the principle and calculation method of each energy source, calculate the ideal output of each energy source with the same time resolution This group of data is recorded as Where j represents the jth group of input variables, and n represents the nth variable in each group of input variables.

[0056] Take the first set of input variables v in,1 、v in,2 ,…,v in,n Take 2 as an example, the corresponding ideal output group is calculated as This group of data is recorded as It should be noted that the subscript 1 corresponds to the first set of input variables. Given different input variables, different ideal output sets can be obtained.

[0057] S3, collects, analyzes and processes user load and grid absorption information to form continuous load curves and absorption curves.

[0058] For power supply stations that generate electricity and connect to the grid, collect the power grid consumption information in the area. For power supply stations that supply energy to specific objects, collect the energy load information of the energy supply objects. Analyze the load and consumption data, and process them appropriately to form load curves and consumption curves. The load curve and consumption curve are normalized continuous data with the same time span and time resolution as the meteorological data. * .

[0059] S4, formulate the operating principles within the energy supply station, and formulate the operation and scheduling method of the energy supply station with energy storage in combination with the energy storage system.

[0060] Specifically, according to the needs, the operation principle of the energy supply station is reasonably formulated, combined with the energy storage system, the operation mode of the energy supply station with energy storage is formed, and the design output curve Cd of the system under the formulated energy supply station operation and dispatching mode is calculated. * , among which, there should be Cd * ≤C * .

[0061] S5, based on the operation principles and operation scheduling methods within the energy supply station, integrates the energy storage capacity to compile the energy supply station coupling operation logic and calculates the actual comprehensive output of the energy supply station.

[0062] Taking the total energy storage capacity S of the energy supply station as the input variable, the operation logic M is compiled based on the conservation of the total energy storage capacity. The operation logic M based on the conservation of the total energy storage capacity cannot be listed in detail. The most basic logic is given below as an example;

[0063] (1) Solar thermal power priority output logic M0: Assuming that the solar thermal system in the energy supply station operates independently and does not consider the problem of absorption, the solar thermal energy collected by the energy supply station is prioritized for power generation or heating, and the excess heat enters the heat storage system. When the energy is insufficient, the heat storage system releases heat to make up for it. For any time period t based on time resolution, the following is true:

[0064] like and but

[0065] like and but

[0066] like but

[0067] like and but

[0068] like and but

[0069] like but

[0070]

[0071] like but

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[0073] like but

[0074] like but

[0075]

[0076] The meaning of each parameter is shown in Table 1.

[0077] Table 1

[0078] Heatab,t is the net heat absorption in the tth period of solar thermal energy; in this case, it is equal to the ideal solar thermal energy output

[0079] Design output of solar thermal energy in the tth period;

[0080] The actual output of solar thermal energy in the tth period;

[0081] S is the total energy storage capacity of the energy supply station, which in this case is equal to the total thermal storage capacity of solar thermal energy;

[0082] The heat storage at the end of the t-1 period of solar thermal energy;

[0083] The heat storage at the end of the tth period of solar thermal energy;

[0084] The amount of heat stored at the end of the last period of solar thermal energy;

[0085] The net heat storage in the tth period of CSP;

[0086] The net heat release in the tth period of photothermal energy;

[0087] The amount of wasted heat in the tth period of CSP;

[0088] (2) Solar thermal recovery logic M1: When photovoltaic power and wind power are abandoned in the energy supply station, the abandoned electricity should enter the heat storage system through the electric heater and then be released through the solar thermal system;

[0089] As a further improvement of logic M 1 When photovoltaic power and wind power are abandoned in the energy recovery station, the abandoned electricity should enter the heat storage system through the electric heater and then be released through the solar thermal system. ab,t +Heat pvd,t +Heat wd,t Heat Alternative ab,t .

[0090] Among them: Heat pvd,t Heat is the conversion of abandoned light into heat in the tth period of photovoltaic power generation; wd,t The abandoned wind power in the tth period is converted into heat.

[0091] (3) Solar thermal output regulation logic M2: When the energy supply station is limited by its absorption capacity, the output of the energy station can be adjusted to reduce the peak and fill the valley;

[0092] As a further improvement of logic M 2 When the energy supply station is limited by its absorption capacity, the output of the energy station can be adjusted to reduce the peak and fill the valley. The operation logic can customize the design output of the solar thermal system. As described in the following examples.

[0093] This embodiment provides a configuration and operation optimization method for a solar thermal + photovoltaic new energy integrated energy supply station. It can evaluate the highest acceptable abandonment rate when the power grid is limited and photovoltaic power may have 10% to 50% abandonment, and provide a reasonable configuration of the solar thermal, photovoltaic, and energy storage capacity of the energy supply station, as well as the operation scheduling method of the energy supply station.

[0094] The integrated energy supply system configuration and scheduling method comprises the following steps:

[0095] A: Collect meteorological data of designated areas;

[0096] Step A also includes step A1: collecting meteorological data for a designated area, with a data span of 1 typical year and a data time resolution of 1 hour, for a total of 8760 hours. The data include total radiation irradiance, normal direct radiation irradiance, wind speed, wind direction, temperature, humidity, atmospheric pressure, etc.

[0097] B: Calculate the ideal output of each energy source in the energy supply station;

[0098] Step B also includes step B1: calculating the hourly net power generation of photovoltaic power according to the meteorological data. And the net heat collected by the solar field hourly The ideal photovoltaic output is the installed capacity v pv The dependent variable, the ideal solar thermal output is the collector field area v csp The dependent variable of , so the hourly net power generation of photovoltaic power of different scales can be expressed as The hourly net heat collection of different scales of solar thermal energy can be expressed as

[0099] C: Collect, analyze and process user load or grid consumption information;

[0100] For step C, step C1 is also included: since it is impossible to obtain grid consumption data with consistent time resolution, the photovoltaic power abandonment rate is recorded as X, 10%≤X≤50%, and the photovoltaic power abandonment amount per hour is assumed to be Considering the efficiency of photovoltaic power generation and heating molten salt, and the comprehensive thermal efficiency of pipeline loss is 95%, the net heat gain of the solar thermal and heat storage system is

[0101]

[0102] D: Propose the operation principles of the energy supply station;

[0103] For step D, it also includes step D1: From the analysis requirements, it can be seen that, on the one hand, photovoltaics do not have the ability to directly store electricity. Photovoltaics can only generate electricity during the day and go online directly, and photovoltaics will abandon electricity. On the other hand, solar thermal belongs to steam turbine power generation, which has the ability to provide rotational inertia, etc., so the solar thermal power is less restricted to the Internet. Therefore, from the perspective of the overall delivery of the energy supply station, it is considered that the output of solar thermal during the day should be reduced as much as possible. Only when the energy storage capacity is full, in order not to waste the collected heat and cause heat abandonment, the excess heat will be sent to the steam turbine for power generation. Taking into account the start and stop of the steam turbine and the flexibility of load increase and decrease, the following operating principles are given:

[0104] (1) The hourly photovoltaic power generation is

[0105] (2) The CSP steam turbine operates at 15% to 100% to ensure the flexibility of load adjustment;

[0106] (3) When the remaining capacity of the heat storage system is sufficient, the net heat gained hourly minus the heat required to maintain the turbine at 15% load will enter the storage tank;

[0107] (4) When the heat storage system is full, all the net heat gained hourly is used for power generation;

[0108] (5) When the heat storage system is full and there is still surplus heat after all the net heat gained hourly is used for power generation, heat abandonment occurs;

[0109] (6) The heat storage system is not allowed to release heat from 8:00 to 17:00 every day, except when it is necessary to maintain the steam turbine at 15% load. At other times, heat is released according to power generation demand.

[0110] E: Compile the coupled operation logic of the energy supply station in combination with the energy storage capacity;

[0111] For step E, it also includes step E1, compiling the scheduling logic M based on the above operating principles.

[0112] F: Calculate the actual comprehensive output of the energy supply station;

[0113] Step F also includes step F1: taking the hourly grid-connected electricity of photovoltaic power Net heat collected hourly by solar thermal and heat storage capacity S as input variables (actually four original input variables v pv 、v csp , X and S), input the dispatch logic M, and calculate the comprehensive output P of the energy supply station * .

[0114] G: Combine configuration and comprehensive output to calculate the optimal index of the energy supply station; according to the optimal index, determine the optimal system configuration and dispatching method of the energy supply station;

[0115] For step G, it also includes step G1: taking the shortest comprehensive static payback period of the energy supply station as the optimal index OP. pv 、v csp , X and S calculate the total investment and annual operating cost of each configuration. * Calculate the total annual income, then

[0116] According to OP calculation results, the optimal configuration of this project is v pv =800MW,v csp =245 loops, X=10%, S=2000MWh, the dispatch logic is as described above and will not be repeated here. When X>10%, the project rate of return does not meet the investment requirements.

[0117] (4) Energy supply prediction logic M3: When the energy supply station operates in an isolated grid state and supplies energy to a specific object, the operation mode of the current period is determined by predicting the energy supply situation of the energy supply station in the short future period.

[0118] As a further improvement of logic M 3 When the energy supply station operates in an isolated grid state and supplies energy to a specific object, the energy supply stability must be guaranteed first. The operation logic can determine the operation mode of the current period by predicting the energy supply situation of the energy supply station in a short period of time in the future, as shown in the following embodiments.

[0119] This embodiment provides an operation and scheduling method for a comprehensive energy supply station that mainly operates in an isolated grid state. The energy supply station supplies energy for a specified target. The energy supply station is equipped with 35MW photovoltaic, 621,000 m2 solar thermal collector field, 40MW solar thermal steam turbine, 16h solar thermal heat storage, 4*1.6MW diesel generator, 26t / h diesel boiler and 6MW grid power supply line.

[0120] Target power load: 32.2MW, with no seasonal, day and night characteristics, or production operation mode differences;

[0121] Energy supply target heat load: stable steam 35t / h in heating season, stable steam 31t / h in non-heating season, steam pressure 0.5MPa(g), steam temperature 158℃, steam return rate 100%, return pressure 0.4MPa(g), return temperature 40℃.

[0122] The power load of the energy supply station is as follows: the power consumption in the daytime heat storage condition is 9.93MW, the power consumption in the daytime non-heat storage condition is 4.6MW, and the power consumption in the daytime heat release condition is 6.7MW.

[0123] It is required to ensure stable energy supply to users as much as possible.

[0124] According to the requirements, formulate the operation goals:

[0125] Class A: Users can operate continuously and stably;

[0126] Class B: Minimum operation by users;

[0127] Level C: Ensure personnel safety and production safety.

[0128] The following energy supply station operation principles are formed:

[0129] (1) Photovoltaic and solar thermal collector fields are given priority for energy supply and heat storage, followed by connection to the external power grid, then the use of molten salt for energy supply, then reducing the user load to Class B, and finally considering the use of diesel boilers for steam supply or diesel generators for electricity supply.

[0130] (2) Two-stage energy conversion methods are not considered, such as boiler steam generation and power generation.

[0131] (3) The solar collector field should prioritize heat storage during the day. If it is judged that the daytime radiation energy cannot support full storage before night, it should be connected to the external network to increase the heat storage capacity.

[0132] (4) When weather conditions are ambiguous and uncertain, operate in a conservative manner and do not allow load increases.

[0133] (5) In order to cope with unknown risks, the heat storage capacity that can support the operation of a 40MW steam turbine for 2 hours is used as a safety margin, so the actual normal available heat storage capacity is 14 hours.

[0134] (6) If it is determined that the diesel generator cannot make up for the energy shortage after running continuously for more than 10 hours, starting the diesel generator to make up for the energy shortage is not allowed, and the load should be further reduced or the machine should be shut down.

[0135] (7) Based on the total energy forecast for three consecutive days, calculate the 24-hour production operation plan for the day.

[0136] (8) Before dusk, the night operation plan is modified according to the difference between the planned heat storage and the existing heat storage. For every 120.5 MWh (corresponding to 1 m hot salt, 285 °C) that the existing heat storage is less than the planned heat storage, the external grid is turned on for 7 hours, or the external grid + diesel generation is turned on for 4 hours.

[0137] implement Figure 2 The logic generates an operation plan between 8:00 today and 8:00 tomorrow, and the required parameters are calculated based on the light and heat efficiency. Figure 2 The scheduling logic includes:

[0138] (1) At 8:00 a.m. on the same day, the dispatcher obtains four input data: the temperature and liquid level of the existing hot salt (as well as the light radiation energy corresponding to the hot salt), the predicted light radiation energy value for today (day 1), the predicted light radiation energy value for tomorrow (day 2), and the predicted light radiation energy value for the day after tomorrow (day 3);

[0139] (2) Assuming that day 3 operates at P3 load, if the total energy supply of photovoltaic, solar thermal and grid supplementation predicted on day 3 is less than P3, the energy shortage Q3 of day 3 must be accumulated to day 2, otherwise, Q3 = 0;

[0140] (3) Assuming that day 2 operates at P2 load, if the total energy supply of photovoltaic, solar thermal and grid supplementation predicted for day 2 is less than P2+Q3, the energy supply deficit Q2 of day 2 must be accumulated to day 1, otherwise, Q2=0;

[0141] (4) Assuming that day 1 operates according to the P1 load, if the total energy supply of photovoltaic, solar thermal and grid supplementation predicted on day 1 is greater than P1+Q2, then the operation plan is output.

[0142] (5) Assuming that day 1 is operated according to the load of P1, if the total energy supply of photovoltaic, solar thermal and grid supplementation predicted on day 1 is less than P1+Q2, then according to different situations, return to step (2), (3) or (4), reduce P3, P2 or P1 and continue with subsequent steps until step (4) is met and the operation plan is output.

[0143] Figure 2 In the embodiment shown, the following two points need to be explained:

[0144] (1) Day 2 and day 3 do not take into account the amount of molten salt inherited from the previous day. They can only consider light, energy replenishment and load reduction. Since the actual situation can inherit the amount of molten salt, this method is relatively conservative.

[0145] (2) Energy replenishment methods include: external network + intermittent stop.

[0146] It should be noted that the present invention cannot exhaustively list all improvements to the operating logic M. The embodiments described are only used to explain the present invention rather than to limit the present invention. Those skilled in the art should be able to give appropriate operating logic according to specific needs based on a full understanding of the present invention without any creative work.

[0147] Based on the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S of the energy supply station and the operation logic M are used as input variables, and the ideal output of each energy source is As a process variable, a calculation model is constructed to calculate the actual comprehensive output P of the energy supply station. j * .

[0148] Taking the first set of input variables as an example, the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S of the energy supply station and the operation logic M are used as input variables, and the ideal output of each energy source is As a process variable, a calculation model is constructed to calculate the actual comprehensive output of the energy supply station

[0149] S6, calculates the optimal index of the energy supply station according to the configuration and actual comprehensive output, and then determines the optimal system configuration and scheduling method of the energy supply station according to the optimal index.

[0150] In this step, "configuration" specifically refers to several main parameters that affect the power generation and energy storage capacity of the energy supply station. In this embodiment, it refers to the total solar thermal collection area, heat storage capacity, power generation and photovoltaic installed capacity.

[0151] Specifically, according to the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S and P of the energy supply station * , calculate the optimal index OP. Among them, P * Refers to the actual comprehensive output of the corresponding energy supply station calculated based on a set of input variables.

[0152] For example:

[0153] Given the first set of v1, v2, v3 and S, calculate P1*, and then calculate OP1;

[0154] Given the second set v1, v2, v3 and S, calculate P2* and then calculate OP2.

[0155] Specifically, determine the appropriate selection principle and OP calculation method according to the needs; substitute v in,1 、v in,2 ,…,v in,n , S and P * , calculate the optimal index OP. The optimal optimal index corresponding to v in,1 、v in,2 ,…,v in,n , S and operation logic M, which is the optimal system configuration and scheduling method of the new energy integrated energy supply station with the solar thermal power station as the main body in this embodiment. It should be noted that the "optimal selection index" is determined according to the definition of the selection index OP. For example, if OP is defined as the rate of return, the maximum value should be taken; if OP is defined as the payback period, the minimum value should be taken.

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A new energy integrated energy supply system configuration and scheduling method, characterized in that: include: S1, collects meteorological resource data of a specified area according to a preset time resolution; S2, taking the installed capacity of each energy source in the energy supply station as the input variable, calculates the ideal output of each energy source in the energy supply station; S3, collect, analyze and process user load and power grid absorption information to form continuous load curve and absorption curve; S4, formulate the operation principles within the energy supply station, and formulate the operation and dispatching mode of the energy supply station with energy storage in combination with the energy storage system; S5, based on the operation principle and operation dispatch mode within the energy supply station, the energy storage capacity is combined to compile the energy supply station coupling operation logic and calculate the actual comprehensive output of the energy supply station; S6, calculates the optimal index of the energy supply station according to the configuration and actual comprehensive output, and then determines the optimal system configuration and scheduling method of the energy supply station according to the optimal index.

2. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S1, the meteorological resource data include: total radiation irradiance, normal direct radiation irradiance, wind speed, wind direction, temperature, humidity, and atmospheric pressure.

3. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S2, the input variables include: total installed capacity of photovoltaic modules, total installed capacity of wind turbines, and total area of ​​solar thermal power generation collector fields.

4. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1 or 3, characterized in that: Substitute the input variables into the annual typical meteorological data CD * , calculate the corresponding ideal output of each energy source with the same time resolution This group of data is recorded as Where j represents the jth group of input variables, and n represents the nth variable in each group of input variables.

5. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S3, the load curve and the consumption curve are normalized continuous data C with the same time span and time resolution as the meteorological data. * .

6. A new energy comprehensive energy supply system configuration and scheduling method according to claim 5, characterized in that: In S4, the design output curve Cd of the system under the specified energy supply station operation dispatch mode is calculated. * , where Cd * ≤C * .

7. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S5, the operation logic includes: Solar thermal priority output logic M0: Assume that the solar thermal system in the energy supply station operates independently, and does not consider the problem of absorption. The solar thermal heat collected is used for power generation or heating first, and the excess heat enters the heat storage system. When the energy is insufficient, the heat storage system releases heat to make up for it; Solar thermal recovery logic M1: When photovoltaic power and wind power are abandoned in the energy supply station using solar thermal recovery, the abandoned electricity should enter the heat storage system through the electric heater and then be released through the solar thermal system; Solar thermal output regulation logic M2: When the energy supply station is limited by its absorption capacity, the peak load of the energy station output can be reduced by adjusting the solar thermal output; Energy supply prediction logic M3: When the energy supply station operates in an isolated grid state and supplies energy to a specific object, the operation mode of the current period is determined by predicting the energy supply situation of the energy supply station in a short period of time in the future.

8. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S5, the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S of the energy supply station and the operation logic M are used as input variables, and the ideal output of each energy source is As a process variable, a calculation model is constructed to calculate the actual comprehensive output P of the energy supply station. j * .

9. A new energy comprehensive energy supply system configuration and scheduling method according to claim 1, characterized in that: In S6, according to the energy scale v in,1 、v in,2 ,…,v in,n , the total energy storage capacity S and P of the energy supply station * , calculate the optimal index OP, where P * Refers to the actual comprehensive output of the corresponding energy supply station calculated based on a set of input variables.

10. A new energy comprehensive energy supply system configuration and scheduling method according to claim 9, characterized in that: The optimal selection index corresponding to v in,1 、v in,2 ,…,v in,n , S and operation logic M, as the optimal system configuration and scheduling method for a new energy integrated energy supply station with a CSP power station as the main body.

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