A method and system for controlling power generation by a plurality of pvt solar panels

Abstract

The application discloses a kind of method and system for controlling the power generation of multiple PVT solar panels, belong to PVT solar panel technical field, comprising the following steps: S1: obtaining total cost of system use;S2: inquires and obtains electricity price;S3: calculate the total power consumption that can be purchased;S4: calculate the number of days that can support enterprise power consumption;S5: determine the power generation control period;S6: calculate the expected daily power generation;S7: control photovoltaic power generation and photo-thermal power generation;S8: revise control power generation parameters, control power generation based on new parameters;The application not only can realize the control power generation of photovoltaic power generation and photo-thermal power generation, but also can ensure that enterprise is always in a profitable state, can improve the market use competitiveness of system.

Description

Technical Field

[0001] This invention belongs to the field of PVT solar panel technology, specifically relating to a method and system for controlling the power generation of multiple PVT solar panels. Background Technology

[0002] Solar panels are devices that can utilize solar photon energy to convert light energy into electrical energy through the photovoltaic effect, and they have been widely used in various industries.

[0003] Chinese Patent No. 201611101456.2 discloses a method and system for controlling the power generation of multiple solar panels. It is designed for multiple solar panels connected in parallel to a battery. It adopts the principle of integral input to process the power, eliminating the DC-DC converter and the large inductor in the entire charging circuit. This reduces the size and inductor heating and switching losses, effectively solving the problem of power point interference caused by different facades at the same time. The addition coupling is used to achieve maximum charging efficiency to the battery pack.

[0004] The inventors of this application have discovered that the existing methods for controlling the power generation of multiple solar panels only apply to photovoltaic power generation and are not suitable for controlling the power generation of PVT solar panels. Therefore, a method and system for controlling the power generation of multiple PVT solar panels are designed to solve the above problems. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a method and system for controlling the power generation of multiple PVT solar panels. This system not only enables controlled photovoltaic and solar thermal power generation but also ensures the enterprise remains profitable, thereby enhancing the system's market competitiveness.

[0006] Another object of the present invention is to provide a system for controlling the power generation of multiple PVT solar panels.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for controlling the power generation of multiple PVT solar panels, comprising the following steps: S1: Obtain cost ICs for configuring photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and IC CSP Acquire the cost AC of maintaining photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and AC CSP ; S2: Obtain the industrial electricity price (EP) for the enterprise's location through online inquiry. CSP ; S3: Calculate the total electricity consumption Q that can be purchased with the total configuration cost of the photovoltaic power generation system and the solar thermal power generation system; S4: Obtain the enterprise's electricity consumption characteristics C, and calculate the total electricity consumption Q that can be purchased to support the number of days D of the enterprise's electricity consumption E ; S5: Compare the above-mentioned number of days D to support the enterprise's electricity consumption E with the rated service life D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem PVT , if D E < D PVT , then take D E as the power generation control period D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem C , otherwise take D PVT as the power generation control period D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem C ; S6: Calculate the expected daily average power generation RPG1 within the power generation control period D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem C ; S7: The photovoltaic power generation subsystem generates electricity, and obtain the daily total output power P of the photovoltaic power generation subsystem dCPV , compare the daily total output power P dCPV with the expected daily average power generation RPG1. If P dCPV > RPG1, then do not control the solar thermal power generation subsystem to generate electricity. If P dCPV < RPG1, then control the solar thermal power generation subsystem to generate electricity until the daily total output power reaches RPG1 and stop charging; S8: During the power generation process, obtain the daily total output power P dCPV1 and P dCPV2 of two days with the same environmental data of the photovoltaic power generation subsystem, calculate the power generation attenuation rate d CPV of the photovoltaic power generation subsystem, and calculate the total power generation RPG2 of the remaining control days D CPV through this power generation attenuation rate d C , then calculate the expected daily average power generation RPG2 within the remaining power generation control period D through the total power generation RPG2, compare RPG1 and RPG2. If RPG2 is greater than RPG1, then the expected daily average power generation RPG1 is not adjusted. Otherwise, adjust the expected daily average power generation RPG1 upward to RPG3 according to a preset ratio until the expected daily average power generation RPG2 is greater than the expected daily average power generation RPG3 and stop. After that, compare the daily total output power P C with the expected daily average power generation RPG3. If P dCPV > RPG3, then do not control the solar thermal power generation subsystem to generate electricity. If P dCPV < RPG3, then control the solar thermal power generation subsystem to generate electricity until the daily total output power reaches RPG3 and stop charging.

[0008] ​​Furthermore, in step S1, the photovoltaic power generation system includes multiple PVT solar panels, an inverter with maximum power point tracking function, and a battery, with the PVT solar panels electrically connected to the inverter and the inverter to the battery.

[0009] Furthermore, in step S1, the solar thermal power generation system includes multiple collectors, a steam turbine, a generator, a battery, and a thermal storage system, with the steam turbine and generator, as well as the generator and battery, being electrically connected.

[0010] Furthermore, in step S3, the formula for calculating the total electricity consumption Q that can be purchased is: .

[0011] Furthermore, in step S4, the number of days of electricity consumption for the enterprise can be supported (D). E The calculation formula is: .

[0012] Furthermore, in step S6, the formula for calculating the estimated daily average power generation RPG1 is as follows: .

[0013] Furthermore, in step S7, the total daily output power P of the photovoltaic power generation system... dCPV The calculation formula is: In the formula: The number of PVT solar panels in the photovoltaic subsystem. The area of ​​the PVT solar panels in the photovoltaic subsystem. Solar irradiance, For inverter efficiency, This is due to pollution and wiring losses in PVT solar panels.

[0014] Furthermore, in step S8, the power generation attenuation rate d of the photovoltaic power generation system CPV The calculation formula is: .

[0015] Furthermore, in step S8, the remaining control days D C The formula for calculating the total power generation RPG2 is: .

[0016] A system for controlling the power generation of multiple PVT solar panels, comprising: The cost calculation module calculates the configuration, maintenance, and operating costs of photovoltaic power generation systems and solar thermal power generation systems for enterprises. The available power calculation module calculates the amount of electricity originally used for purchasing electricity based on the configuration, maintenance and operation costs of the photovoltaic power generation system and the solar thermal power generation system and the local electricity price of the enterprise; The power generation control period calculation module calculates the number of days that the available electricity consumption can be provided to the enterprise based on the available electricity consumption and the enterprise's electricity consumption characteristics, and compares it with the rated service life of the photovoltaic power generation system and the solar thermal power generation system to determine the power generation control period of the photovoltaic power generation system and the solar thermal power generation system. The daily power generation calculation module calculates the daily power generation of the enterprise's photovoltaic power generation system and solar thermal power generation system based on the available electricity consumption and the power generation control period. The power generation control module compares the daily power generation with the total daily output power of the photovoltaic power generation system. It controls the power generation of the photovoltaic power generation system on a daily basis, and controls the solar thermal power generation system to generate the missing power when the power generation of the photovoltaic power generation system is insufficient. The power generation control correction module calculates the amount of electricity that can be generated within the remaining control period in real time based on the power generation decay rate, and calculates the expected daily power generation. If the expected daily power generation is less than the current expected daily power generation, it makes adjustments until the expected daily power generation is greater than the current expected daily power generation.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention calculates the original available electricity volume based on the purchase cost and maintenance and operation cost of the power generation system, then calculates the number of days the enterprise can use the electricity based on the available electricity volume, then calculates the control period based on comparison, and then calculates the expected average daily power generation based on the available electricity volume and the control period. Finally, it controls the allocation of photovoltaic power generation and solar thermal power to supplement or surplus electricity based on the expected average daily power generation, and at the same time corrects the expected average daily power generation in real time based on the power generation decay rate. This not only enables controlled power generation of photovoltaic and solar thermal power generation, but also ensures that the enterprise is always in a profitable state, and improves the market competitiveness of the system. Attached Figure Description

[0018] Figure 1 This is a system framework diagram of the present invention; In the diagram: 1. Cost calculation module; 2. Available power calculation module; 3. Power generation control period calculation module; 4. Daily power generation calculation module; 5. Power generation control module; 6. Power generation control correction module. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 The present invention provides the following technical solution: a method for controlling the power generation of multiple PVT solar panels, comprising the following steps: S1: Obtain cost ICs for configuring photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and IC CSP Acquire the cost AC of maintaining photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and AC CSP If a company has its own profit target P A Then P needs to be A Added together with the above costs; S2: Obtain the industrial electricity price (EP) for the enterprise's location through online inquiry. CSP ; S3: Calculate the total electricity consumption that can be purchased with the total configuration cost of the photovoltaic power generation system and the solar thermal power generation system. Q: If the company has its own profit target P A Then the total electricity available for purchase is Q. A : ; S4: Obtain the enterprise's electricity consumption characteristics C, and calculate the number of days the total purchasable electricity Q can support the enterprise's electricity consumption D. E : If the company has its own profit target P A Then it supports the number of days of electricity consumption for enterprises, D. EA : ; S5: Compare the above-mentioned support enterprises' electricity usage days D E Or D EA The rated service life D of photovoltaic power generation systems and solar thermal power generation systems PVT If D E Or D EA <D PVT Then D E Or D EA The power generation control period D for photovoltaic power generation systems and solar thermal power generation systems C, otherwise, D PVT is used as the power generation control period D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem C ; S6: Calculate the power generation control period D of the photovoltaic power generation subsystem and the solar thermal power generation subsystem C The estimated daily average power generation RPG1 within: If the enterprise has its own profit target P A , then the estimated daily average power generation RPG C within the power generation control period D 1A : S7: The photovoltaic power generation subsystem generates power, and the daily total output power P of the photovoltaic power generation subsystem is obtained dCPV , compare the daily total output power P dCPV with the estimated daily average power generation RPG1 or RPG 1A , if P dCPV > RPG1 or RPG 1A , then do not control the solar thermal power generation subsystem to generate power, and the excess power generation is incorporated into the power grid for profit. If P dCPV < RPG1 or RPG 1A , then control the solar thermal power generation subsystem to generate power until the daily total output power reaches RPG1 or RPG 1A Stop charging. Among them, the calculation formula of the daily total output power P dCPV is: is the number of PVT solar panels in the photovoltaic subsystem, is the area of the PVT solar panels in the photovoltaic subsystem, is the solar irradiance intensity, is the inverter efficiency, is the loss caused by pollution and wiring of the PVT solar panels; S8: During the power generation process, obtain the daily total output power P of two days with the same environmental data of the photovoltaic power generation subsystem dCPV1 and P dCPV2 , calculate the power generation attenuation rate d of the photovoltaic power generation subsystem CPV , and calculate the total power generation RPG2 of the remaining control days D CPV through this power generation attenuation rate d C , and then calculate the estimated daily average power generation RPG2 within the remaining power generation control period D C by the total power generation RPG2, and compare RPG1 or RPG 1A and RPG2. If RPG2 is greater than RPG1 or RPG 1A, then the expected daily power generation RPG1 or RPG 1A remains unchanged. Otherwise, the expected daily power generation RPG1 or RPG 1A is adjusted upward to RPG3 according to a preset ratio until the expected daily power generation RPG2 is greater than the expected daily power generation RPG3 and then stops. After that, compare the daily total output power P dCPV with the expected daily power generation RPG3. If P dCPV > RPG3, then do not control the power generation of the solar thermal power generation subsystem. If P dCPV < RPG3, then control the power generation of the solar thermal power generation subsystem until the daily total output power reaches RPG3 and stops charging. Among them: The power generation attenuation rate d CPV is calculated as follows: The formula for the total power generation RPG2 is: .

[0021] Specifically, in step S1, the photovoltaic power generation subsystem includes multiple PVT solar panels, an inverter with a maximum power point tracking function, and a storage battery. The PVT solar panels are electrically connected to the inverter, and the inverter is electrically connected to the storage battery.

[0022] Specifically, in step S1, the solar thermal power generation subsystem includes multiple collectors, a steam turbine, a generator, a storage battery, and a heat storage system. The steam turbine is electrically connected to the generator, and the generator is electrically connected to the storage battery.

[0023] Specifically, a system for controlling the power generation of multiple PVT solar panels includes: Cost calculation module 1, which calculates the configuration, maintenance, and operation costs of the enterprise for the photovoltaic power generation subsystem and the solar thermal power generation subsystem; Available power calculation module 2, which calculates the amount of electricity that could be purchased with the above costs for the configuration, maintenance, and operation of the photovoltaic power generation subsystem and the solar thermal power generation subsystem and the local electricity price of the enterprise; Power generation control period calculation module 3, which calculates the number of days that the available electricity can provide for the enterprise based on the available electricity and the electricity consumption characteristics of the enterprise, and compares it with the rated service life of the photovoltaic power generation subsystem and the solar thermal power generation subsystem to determine the power generation control period of the photovoltaic power generation subsystem and the solar thermal power generation subsystem; Daily power generation calculation module 4, which calculates the daily power generation of the enterprise's photovoltaic power generation subsystem and solar thermal power generation subsystem based on the available electricity and the power generation control period; The power generation control module 5 compares the daily power generation with the total daily output power of the photovoltaic power generation system, controls the power generation of the photovoltaic power generation system on a daily basis, and controls the solar thermal power generation system to generate the missing power when the power generation of the photovoltaic power generation system is insufficient. The power generation control correction module 6 calculates the amount of electricity that can be generated within the remaining control period in real time based on the power generation decay rate, and calculates the expected daily power generation. If the expected daily power generation is less than the current expected daily power generation, it makes adjustments until the expected daily power generation is greater than the current expected daily power generation.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for controlling the power generation of multiple PVT solar panels, characterized in that, Includes the following steps: S1: Obtain cost ICs for configuring photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and IC CSP Acquire the cost AC of maintaining photovoltaic power generation systems and solar thermal power generation systems for enterprises. CPV and AC CSP ; S2: Obtain the industrial electricity price (EP) for the enterprise's location through online inquiry. CSP ; S3: Calculate the total electricity consumption Q that can be purchased with the total configuration cost of the photovoltaic power generation system and the solar thermal power generation system; S4: Obtain the enterprise's electricity consumption characteristics C, and calculate the number of days the total purchasable electricity Q can support the enterprise's electricity consumption D. E ; S5: Compare the above-mentioned support enterprises' electricity usage days D E The rated service life D of photovoltaic power generation systems and solar thermal power generation systems PVT If D E <D PVT Then D E The power generation control period D for photovoltaic power generation systems and solar thermal power generation systems C Conversely, D will be PVT The power generation control period D for photovoltaic power generation systems and solar thermal power generation systems C ; S6: Calculate the power generation control period D for photovoltaic power generation systems and solar thermal power generation systems. C The estimated average daily power generation within the area is RPG1; S7: The photovoltaic power generation subsystem generates electricity and obtains the daily total output power P of the photovoltaic power generation subsystem dCPV , compare the daily total output power P dCPV with the predicted average daily power generation RPG1. If P dCPV > RPG1, then do not control the solar thermal power generation subsystem to generate electricity. If P dCPV < RPG1, then control the solar thermal power generation subsystem to generate electricity until the daily total output power reaches RPG1 and stops charging; S8: During the power generation process, obtain the total daily output power P of two days with the same environmental data of the PV power generation subsystem dCPV1 and P dCPV2 , calculate the power generation attenuation rate d of the PV power generation subsystem CPV . Through this power generation attenuation rate d CPV calculate the remaining control days D C of the total power generation RPG2, and then calculate the remaining power generation control period D through the total power generation RPG2 C The predicted daily average power generation RPG2 within, compare RPG1 and RPG2. If RPG2 is greater than RPG1, the predicted daily average power generation RPG1 remains unchanged. Otherwise, the predicted daily average power generation RPG1 is adjusted upward to RPG3 according to a preset ratio until the predicted daily average power generation RPG2 is greater than the predicted daily average power generation RPG3 and stops. After that, compare the total daily output power P dCPV with the predicted daily average power generation RPG3. If P dCPV >RPG3, do not control the power generation of the CSP power generation subsystem. If P dCPV <RPG3, control the power generation of the CSP power generation subsystem until the total daily output power reaches RPG3 and stops charging.

2. The method for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S1, the photovoltaic power generation system includes multiple PVT solar panels, an inverter with maximum power point tracking function, and a battery. The PVT solar panels are electrically connected to the inverter and the battery.

3. The method for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S1, the solar thermal power generation system includes multiple collectors, a steam turbine, a generator, a battery, and a thermal storage system. The steam turbine and the generator, as well as the generator and the battery, are electrically connected.

4. The method for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S3, the formula for calculating the total electricity consumption Q that can be purchased is: 。 5. The method for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S4, the number of days of electricity consumption for the enterprise can be supported (D). E The calculation formula is: 。 6. The method for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S6, the formula for calculating the estimated daily average power generation RPG1 is as follows: 。 7. The method and system for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S7, the total daily output power P of the photovoltaic power generation system dCPV The calculation formula is: In the formula: The number of PVT solar panels in the photovoltaic subsystem. The area of ​​the PVT solar panels in the photovoltaic subsystem. Solar irradiance, For inverter efficiency, This is due to pollution and wiring losses in PVT solar panels.

8. The method and system for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S8, the power generation attenuation rate d of the photovoltaic power generation system CPV The calculation formula is: 。 9. The method and system for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that: In step S8, the remaining control days D C The formula for calculating the total power generation RPG2 is: 。 10. A system for controlling the power generation of multiple PVT solar panels according to claim 1, characterized in that, include: The cost calculation module (1) calculates the configuration, maintenance and operation costs of the photovoltaic power generation system and the solar thermal power generation system for the enterprise; The available power calculation module (2) calculates the amount of electricity originally used for purchasing power based on the configuration and maintenance operating costs of the photovoltaic power generation system and the solar thermal power generation system and the local electricity price of the enterprise; The power generation control period calculation module (3) calculates the number of days that the available electricity consumption can be provided to the enterprise based on the available electricity consumption and the enterprise's electricity consumption characteristics, and compares it with the rated service life of the photovoltaic power generation system and the solar thermal power generation system to determine the power generation control period of the photovoltaic power generation system and the solar thermal power generation system. The daily power generation calculation module (4) calculates the daily power generation of the enterprise's photovoltaic power generation system and solar thermal power generation system based on the available electricity consumption and the power generation control period; The power generation control module (5) controls the power generation of the photovoltaic power generation system on a daily basis by comparing the daily power generation with the total daily output power of the photovoltaic power generation system. When the power generation of the photovoltaic power generation system is insufficient, it controls the power generation of the solar thermal power generation system to reduce the power generation of the solar thermal power generation system. The power generation control correction module (6) calculates the amount of electricity that can be generated within the remaining control period based on the power generation decay rate in real time, and calculates the expected daily power generation. If the expected daily power generation is less than the current expected daily power generation, it makes adjustments until the expected daily power generation is greater than the current expected daily power generation.

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