A dispatching control method and system based on microgrid virtual power plant optimization

Abstract

The present invention relates to the field of power distribution in power plants, and specifically to a dispatching control method and system based on optimization of a microgrid virtual power plant. A microgrid access system and a new energy power generation system are set up to compensate for the power of a main power grid, and the power generation energy of the new energy power generation system can be stored and adjusted. A dispatching and scheduling system is set up to dispatch and integrate various new energy power generation systems. A simulation system is set up to simulate the future power consumption of the main power grid, and the power generation of the new energy power generation system is dispatched according to the simulation results. The power generation of the new energy power generation system is adjusted by comparing the prediction results and the simulation results under various environments. When the difference between the power consumption change and the simulation value is large, a traditional energy compensation system is connected to compensate for the defect that the power generation of the new energy power generation system reaches a peak slowly.

Description

Technical Field

[0001] The present invention relates to the field of power plant distribution, and in particular to a dispatching control method and system based on microgrid virtual power plant optimization. Background Art

[0002] The existing power grid generally uses renewable energy for power generation, and when adjusting the output peaks and troughs of the entire power grid, traditional thermal power plants are used to supplement the power generation, that is, cooperation is carried out between renewable energy power generation and traditional thermal power plant power generation. Renewable energy power generation generally has the characteristics of stable power generation and less pollution, while traditional thermal power plant power generation has the characteristics of large output power and fast peak value during power grid peak regulation. Existing microgrid power generation mostly uses renewable energy (such as solar energy, wind energy, etc.) and distributed energy systems to reduce dependence on traditional energy. The characteristics of microgrids also enable the main power grid to supplement electric energy from microgrids when the load needs to increase. The invention patent with publication number CN118172123A discloses a collaborative optimization method and system for multi-microgrid operation and transaction in a virtual power plant, so that the microgrid can optimize the internal unit and energy storage operation considering the market transaction situation; in the trading mechanism In terms of control, a bilateral auction mechanism that comprehensively considers quotations and transaction volumes is proposed, which can reduce the impact of quotations and limit malicious bidding behavior; the invention patent with publication number CN118229454A discloses a highway microgrid virtual power plant optimization scheduling method considering carbon emissions, by establishing a virtual power plant system architecture, an energy supply unit model, and a virtual power plant operation optimization scheduling model considering carbon emission costs, and using an optimization model based on a multi-objective particle swarm algorithm to solve it; that is, the microgrid virtual technology in the prior art is still based on pure renewable energy power generation to optimize the scheduling of power plants. With the increase in electricity consumption and the increase in the peak power consumption of the main power grid, the requirements for peak and frequency regulation of the entire main power grid are also getting higher and higher. As an auxiliary energy storage device, the existing microgrid can no longer meet the needs of the main power grid when the power demand is high by only using new energy for power generation and energy storage. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above technical problems, the present invention provides a dispatching control method and system based on microgrid virtual power plant optimization.

[0005] (II) Technical solution

[0006] A dispatching and control system based on microgrid virtual power plant optimization includes a microgrid access system, a new energy power generation system, a detection system, a simulation system, a dispatching and dispatching system, an energy storage system, a connection system, and a traditional energy compensation system; the microgrid access system is connected to the new energy power generation system, and the new energy power generation system includes a photovoltaic power generation system, a wind power generation system, and a biomass power generation system; the photovoltaic power generation system, the wind power generation system, and the biomass power generation system are all connected to the microgrid access system through transmission lines.

[0007] Furthermore, the microgrid access system is connected to the main grid to compensate the main grid for power, and the detection system detects the power demand of the main grid. The detection time is △T 0 During the time period, △T 0 The power demand detection situation of the main grid within the time period is input into the simulation system, and the simulation system simulates the future △T of the main grid according to the demand situation. 1 The electricity demand during the time period.

[0008] Furthermore, the simulation system inputs the simulation values ​​into the dispatching and scheduling system. The dispatching and scheduling system connects the photovoltaic power generation system, the wind power generation system, and the biomass power generation system through the connection system, and calculates the power generation peaks of the three new energy power generation systems and the time to reach the peak.

[0009] Furthermore, the power generation dispatch of the new energy power generation system of the microgrid and the power compensation value of the microgrid to the main grid are performed according to the simulation value.

[0010] Furthermore, the energy storage system is arranged outside the microgrid access system, and the energy storage system is connected to the microgrid access system through a bidirectional transmission line.

[0011] Furthermore, the traditional energy compensation system is connected to the microgrid access system. The traditional energy compensation system includes a high-power generator, a medium-power generator and a low-power generator. The high-power generator, the medium-power generator and the low-power generator are all connected to the microgrid access system through transmission lines. The high-power generator is connected to the coal furnace steam chamber I through connecting line I, the medium-power generator is connected to the coal furnace steam chamber II through connecting line II, and the low-power generator is connected to the coal furnace steam chamber III through connecting line III.

[0012] Furthermore, the detection system will △T 0 The change value of the main power grid power demand within the time period is input into the simulation system for simulation, and the simulation 0-△T is set. 1 The change trend of the main grid power demand during the time is f(dx), where the function f(dx) is determined by the detection results, simulating 0-△T 1 The power demand of the main power grid during the time period is , the simulated peak demand value occurs at time t 1The simulated peak demand at this time is P, and the specific compensation value of the microgrid access system is calculated based on the simulation results.

[0013] Furthermore, the dispatching system determines the specific access method of the new energy power generation system according to the simulated power consumption and the actual power generation peak and power generation of the three new energy power generation systems. If a single photovoltaic power generation system, wind power generation system, and biomass power generation system can meet the simulated power demand and simulated peak, a single new energy power generation system will be selected. If it cannot be met, the dispatching system will be used to combine the various new energy power generation systems to generate electricity for the microgrid access system and compensate for the main power grid.

[0014] Furthermore, when electricity is officially used, the detection system is used to detect the conditions of electricity use, and the actual total electricity consumption and peak electricity consumption are predicted. If the specific temperature change of the detected electricity environment is large and extreme temperature conditions occur, the prediction is between 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the temperature change weight parameter, is the calculation constant for power consumption, It is the calculation constant of peak power consumption.

[0015] Furthermore, if the detected specific power consumption environment weather changes greatly and extreme weather occurs, the prediction is made within 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weather change weight parameter.

[0016] Furthermore, if the detected specific power consumption environment changes greatly, it is predicted that the power consumption in the region of 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when , When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weight parameter of regional change.

[0017] Furthermore, when the simulation system simulates the power demand of the main power grid, the weight of weather changes is B, the weight of temperature changes is A, and the weight of regional changes is C, and the weights A>B>C are set.

[0018] Furthermore, if the detection system detects that the amount of electricity required to be compensated by the microgrid access system is less than the simulated compensation amount, the bidirectional transmission line will be opened to store the excess electricity in the energy storage system.

[0019] Furthermore, if the detection system detects that the power consumption change of the main grid deviates greatly from f(dx), that is, when the peak power consumption arrives faster, the dispatching system connects the traditional energy compensation system to the microgrid access system to compensate for the traditional energy.

[0020] Furthermore, the specific high, medium and low power generators connected to the traditional energy compensation system are determined according to the variation of power consumption and the deviation scale between the peak value and the simulated f(dx).

[0021] (III) Beneficial effects

[0022] The present invention compensates the main power grid for electricity by setting up a microgrid access system and a new energy power generation system, and can store and adjust the power generation energy of the new energy power generation system, and dispatch and integrate various new energy power generation systems by setting up a dispatching and scheduling system, and simulates the future power consumption of the main power grid by setting up a simulation system, and dispatches the power generation of the new energy power generation system according to the simulation result, and adjusts the power generation of the new energy power generation system by comparing the prediction results and simulation results under various environments, and accesses the traditional energy compensation system when the difference between the power consumption change and the simulation value is large to make up for the defect that the new energy power generation system reaches the peak power slowly. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 Schematic diagram of the control system.

[0024] 1- Microgrid access system; 2- Photovoltaic power generation system; 3- Wind power generation system; 4- Biomass power generation system; 5- Energy storage system; 6- High power generator; 7- Medium power generator; 8- Low power generator; 9- Coal furnace steam room I; 10- Coal furnace steam room II; 11- Coal furnace steam room III. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] A dispatching and control system based on microgrid virtual power plant optimization includes a microgrid access system 1, a new energy power generation system, a detection system, a simulation system, a dispatching and dispatching system, an energy storage system, a connection system, and a traditional energy compensation system; the microgrid access system 1 is connected to the new energy power generation system, and the new energy power generation system includes a photovoltaic power generation system 2, a wind power generation system 3, and a biomass power generation system 4; the photovoltaic power generation system 2, the wind power generation system 3, and the biomass power generation system 4 are all connected to the microgrid access system through transmission lines, the microgrid access system 1 is connected to the main power grid, and the main power grid is compensated for electricity, and the detection system detects the power demand of the main power grid and converts △T 0 The power demand detection situation of the main grid within the time period is input into the simulation system, and the simulation system simulates the future △T of the main grid according to the demand situation. 1 The power demand situation within a certain period of time. When the simulation system simulates the power demand situation of the main power grid, the weight of weather changes is B, the weight of temperature changes is A, and the weight of regional changes is C. The weights A>B>C are set. The simulation system inputs the simulated values ​​into the dispatching system. The dispatching system connects the photovoltaic power generation system 2, the wind power generation system 3, and the biomass power generation system 4 through the connection system, and calculates the power generation peaks of the three new energy power generation systems and the time to reach the peak. According to the simulation values, the microgrid is dispatched for the power generation of the new energy power generation system and the power compensation value of the microgrid to the main power grid is carried out. The energy storage system 5 is arranged outside the microgrid access system 1, the energy storage system 5 is connected to the microgrid access system through a bidirectional transmission line, the traditional energy compensation system is connected to the microgrid access system, the traditional energy compensation system includes a high-power generator 6, a medium-power generator 7 and a low-power generator 8; the high-power generator 6, the medium-power generator 7 and the low-power generator 8 are all connected to the microgrid access system through a transmission line, the high-power generator is connected to the coal furnace steam chamber I9 through a connecting line I, the medium-power generator is connected to the coal furnace steam chamber II10 through a connecting line II, and the low-power generator is connected to the coal furnace steam chamber III11 through a connecting line III.

[0027] The detection system will △T 0 The change value of the main power grid power demand within the time period is input into the simulation system for simulation, and the simulation 0-△T is set. 1 The change trend of the main grid power demand during the time is f(dx), where the function f(dx) is determined by the detection results, simulating 0-△T 1The power demand of the main power grid during the time period is , the simulated peak demand value occurs at time t 1 The simulated peak demand at this time is P, and the specific compensation value of the microgrid access system is calculated based on the simulation results.

[0028] The dispatching system determines the specific access method of the new energy power generation system according to the simulated power consumption and the actual power generation peak and power generation of the three new energy power generation systems. If a single photovoltaic power generation system, wind power generation system, or biomass power generation system can meet the simulated power demand and simulated peak, a single new energy power generation system will be selected. If it cannot be met, the dispatching system will be used to combine the various new energy power generation systems to generate electricity for the microgrid access system and compensate for the main power grid.

[0029] When electricity is officially used, the detection system detects the conditions of electricity use and predicts the actual total electricity consumption and peak electricity consumption. If the detected specific electricity environment temperature changes greatly and extreme temperature conditions occur, the prediction is between 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the temperature change weight parameter, is the calculation constant for power consumption, It is the calculation constant of peak power consumption.

[0030] If the detected specific power consumption environment weather changes greatly, when extreme weather occurs, the forecast is 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weather change weight parameter.

[0031] If the detected specific power consumption environment changes greatly, the prediction is 0-△T 1 The specific power consumption during the time is The specific peak power consumption is , then when , When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weight parameter of regional change.

[0032] If the detection system detects that the amount of electricity required to be compensated by the microgrid access system is less than the simulated compensation amount, the bidirectional transmission line will be opened to store the excess electricity in the energy storage system.

[0033] If the detection system detects that the power consumption change of the main grid deviates greatly from f(dx), that is, the peak power consumption arrives faster, the dispatching system will connect the traditional energy compensation system to the microgrid access system to compensate for the traditional energy.

[0034] The specific high, medium and low power generators connected to the traditional energy compensation system are determined according to the change in electricity consumption and the deviation scale compared with the peak value and the simulated f(dx).

Claims

1. A dispatching control method based on microgrid virtual power plant optimization, characterized by: Including microgrid access system, new energy power generation system, detection system, simulation system, dispatching system, energy storage system, connection system, traditional energy compensation system; The detection system inputs the change value of the power demand of the main grid within the time of △T0 into the simulation system for simulation, and sets the change trend of the power demand of the main grid within the time of 0-△T1 to be f(dx), where the function f(dx) is determined by the detection result, and the power demand of the main grid within the time of 0-△T1 is , the simulated peak demand value appears at time t1, and the simulated peak demand is P, and the specific compensation value of the microgrid access system is calculated according to the simulation results; the specific access method of the new energy power generation system is determined by the dispatching system according to the simulated power consumption and the actual power generation peak and power generation of the three new energy power generation systems. If a single photovoltaic power generation system, wind power generation system, and biomass power generation system can meet the simulated power demand and simulated peak, a single new energy power generation system is selected. If it cannot be met, the dispatching system is used to combine the various new energy power generation systems to generate power for the microgrid access system and compensate for the main power grid; when the power is officially used, the detection system is used to detect the power conditions, and the actual total power consumption and peak power consumption are predicted. If the specific power consumption environment temperature detected changes greatly and extreme temperature conditions occur, the specific power consumption within the time of 0-△T1 is predicted to be The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the temperature change weight parameter, is the calculation constant for power consumption, It is the calculation constant of peak power consumption.

2. The dispatching control method based on microgrid virtual power plant optimization according to claim 1 is characterized in that: If the detected specific power consumption environment and weather changes greatly, and extreme weather occurs, the specific power consumption within the time of 0-△T1 is predicted to be The specific peak power consumption is , then when ; When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weather change weight parameter. If the detected specific power consumption environment changes greatly, the specific power consumption within the time of 0-△T1 is predicted to be The specific peak power consumption is , then when , When the number of renewable energy power generation systems is increased, it is necessary to adjust the combination of the renewable energy power generation systems through the dispatching system, increase the number of renewable energy power generation systems integrated into the microgrid access system, is the weight parameter of regional change.

3. The dispatching control method based on microgrid virtual power plant optimization according to claim 2 is characterized in that: When the simulation system simulates the power demand of the main power grid, the weight of weather changes is B, the weight of temperature changes is A, and the weight of regional changes is C, and the weights are set to A>B>C.

4. The dispatching control method based on microgrid virtual power plant optimization according to claim 3 is characterized in that: If the detection system detects that the amount of electricity required to be compensated by the microgrid access system is less than the simulated compensation amount, the bidirectional transmission line will be opened to store the excess electricity in the energy storage system. If the detection system detects that the change in power consumption of the main grid deviates greatly from f(dx), that is, the peak power consumption arrives faster, the dispatching system will connect the traditional energy compensation system to the microgrid access system to compensate for traditional energy. The specific high, medium and low power generators of the connected traditional energy compensation system are determined based on the change in power consumption and the deviation scale between the peak and the simulated f(dx).

5. A system for scheduling based on the scheduling control method for optimizing a microgrid virtual power plant according to any one of claims 1 to 4, characterized in that: The microgrid access system is connected to the new energy power generation system, which includes photovoltaic power generation system, wind power generation system and biomass power generation system. The photovoltaic power generation system, wind power generation system and biomass power generation system are all connected to the microgrid access system through transmission lines. The microgrid access system is connected to the main power grid to compensate the main power grid for electricity. The detection system detects the power demand of the main power grid within the △T0 time period, and inputs the main power grid power demand detection situation within the △T0 time period into the simulation system. The simulation system simulates the power demand situation of the main power grid within the future △T1 time period according to the demand situation, where T1 is the future time.

6. The system according to claim 5, characterized in that: The simulation system inputs the simulation values ​​into the dispatching and scheduling system. The dispatching and scheduling system connects the photovoltaic power generation system, wind power generation system and biomass power generation system through the connection system, and calculates the power generation peak values ​​of the three new energy power generation systems and the time to reach the peak value.

7. The system according to claim 6, characterized in that: According to the simulation value, the microgrid performs power generation dispatch of the new energy power generation system and the power compensation value of the microgrid to the main grid. The energy storage system is set outside the microgrid access system, and the energy storage system is connected to the microgrid access system through a bidirectional transmission line.

8. The system according to claim 7, characterized in that: The traditional energy compensation system is connected to the microgrid access system. The traditional energy compensation system includes a high-power generator, a medium-power generator and a low-power generator. The high-power generator, the medium-power generator and the low-power generator are all connected to the microgrid access system through transmission lines. The high-power generator is connected to the coal furnace steam chamber I through connecting line I, the medium-power generator is connected to the coal furnace steam chamber II through connecting line II, and the low-power generator is connected to the coal furnace steam chamber III through connecting line III.

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