CN-115693767-B - Active power adjusting method, device, equipment and medium for photovoltaic power station

CN115693767BCN 115693767 BCN115693767 BCN 115693767BCN-115693767-B

Abstract

The invention discloses a method, a device, equipment and a medium for regulating active power of a photovoltaic power station, which belong to the technical field of photovoltaic power generation, and firstly, the power to be distributed is determined according to the regulating target power of the active power of the photovoltaic power station and the current active power of a preset full power unit; then, determining the actual regulating power of each power generation unit in the photovoltaic power station according to the power to be distributed and the weight coefficient of each power generation unit in the photovoltaic power station; and finally, regulating the current active power of each power generation unit to the actual regulated power. Therefore, when the generated power of the photovoltaic power station is regulated, the distribution correction times are reduced (the distribution times are reduced to one time), the generated power of each generation unit in the photovoltaic power station is accurately, quickly and reasonably distributed, the regulated target power of the photovoltaic power station is tracked, the generation loss caused by the average distribution scheme when the regulation is required for a plurality of times is obviously reduced, and the generation income of the photovoltaic power station is improved.

Inventors

CAI HAO
CHEN PENG
MENG PENGFEI

Assignees

阳光电源股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221028

Claims (10)

1. The active power adjustment method of the photovoltaic power station is characterized by comprising the following steps of: Determining a weight coefficient of each power generation unit in the photovoltaic power station; determining power to be distributed according to the adjustment target power of the active power of the photovoltaic power station and the current active power of a preset full-power unit; Determining the actual regulating power of each power generation unit in the photovoltaic power station according to the power to be distributed and the weight coefficient, and regulating the current active power of each power generation unit to the actual regulating power; the step of determining the weight coefficient of each power generation unit in the photovoltaic power station comprises the following steps: Determining a current regulation scene corresponding to the regulation target power, and determining a history similar day similar to the current regulation scene; determining the weight coefficient of each power generation unit in the photovoltaic power station according to the similar daily power of each power generation unit in the historical similar solar photovoltaic power station; The step of determining the weight coefficient of each power generation unit in the photovoltaic power station according to the similar daily power of each power generation unit in the historical similar solar photovoltaic power station comprises the following steps: Determining a power ratio between the similar daily power of the preset full power unit and the similar daily power of all the power generation units except the preset full power unit in the photovoltaic power station by taking the similar daily power of the preset full power unit as a reference, and taking the power ratio as the weight coefficient of all the power generation units except the preset full power unit; the weight coefficient of the preset full-hair unit is 1.
2. The method of active power conditioning of a photovoltaic power plant of claim 1, wherein the step of determining a historical similarity day that is similar to the current conditioning scenario comprises: Acquiring current electrical parameters and current environmental parameters in the current regulation scene; And determining a historical similar day similar to the current adjustment scene according to the current electrical parameter and the current environment parameter.
3. The method for regulating active power of a photovoltaic power plant according to claim 1, wherein said step of determining the actual regulated power of each power generation unit in the photovoltaic power plant based on said power to be distributed and said weight coefficient comprises: And if the power generation unit is a preset full power unit, determining that the actual regulating power of the preset full power unit is the current active power of the preset full power unit.
4. The method for regulating active power of a photovoltaic power plant according to claim 1, wherein said step of determining the actual regulated power of each power generation unit in the photovoltaic power plant based on said power to be distributed and said weight coefficient comprises: if the power generation units are non-preset full power generation units, determining a weight ratio between the weight coefficient of the non-preset full power generation units and the sum of the weight coefficients of all the non-preset full power generation units, and determining the actual regulating power of each power generation unit in the photovoltaic power station according to the power to be distributed and the weight ratio corresponding to each power generation unit.
5. The method of active power conditioning of a photovoltaic power plant of claim 1, wherein prior to the step of conditioning the current active power of each power generation unit to the actual conditioned power, further comprising: determining the current adjustable maximum active power of each power generation unit in the photovoltaic power station; And if the actual regulated power of each power generation unit is not greater than the corresponding maximum active power, executing the step of regulating the current active power of each power generation unit to the actual regulated power.
6. The method of active power conditioning of a photovoltaic power plant of claim 5, wherein the step of determining the maximum active power currently adjustable for each power generation unit within the photovoltaic power plant comprises: and determining the current adjustable maximum active power of each power generation unit in the photovoltaic power station according to the current active power of the preset full power generation unit and the weight coefficient of each power generation unit.
7. The method of claim 1, wherein prior to the step of determining the weight coefficients for each power generation unit in the photovoltaic power plant, further comprising: And if the power adjustment instruction corresponding to the adjustment target power of the active power of the photovoltaic power station is an instruction for lifting the active power of the photovoltaic power station, executing the step of determining the weight coefficient of each power generation unit in the photovoltaic power station.
8. A photovoltaic power plant active power adjustment device, characterized in that the photovoltaic power plant active power adjustment device comprises: the weight coefficient determining module is used for determining weight coefficients of all power generation units in the photovoltaic power station; The power to be distributed determining module is used for determining the power to be distributed according to the adjustment target power of the active power of the photovoltaic power station and the current active power of the preset full power unit; the actual adjusting power determining module is used for determining the actual adjusting power of each power generation unit in the photovoltaic power station according to the power to be distributed and the weight coefficient, and adjusting the current active power of each power generation unit to the actual adjusting power; the weight coefficient determining module is also used for determining a current adjusting scene corresponding to the adjusting target power, and determining a history similar day similar to the current adjusting scene; The weight coefficient determining module is further configured to determine a power ratio between the similar daily power of the preset full power unit and the similar daily power of all the power generation units except the preset full power unit in the photovoltaic power station based on the similar daily power of the preset full power unit, and use the power ratio as the weight coefficient of all the power generation units except the preset full power unit, where the weight coefficient of the preset full power unit is 1.
9. A photovoltaic plant active power conditioning apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the photovoltaic plant active power conditioning method of any of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, implements the steps of the photovoltaic power plant active power adjustment method of any of claims 1 to 7.

Description

Active power adjusting method, device, equipment and medium for photovoltaic power station Technical Field The invention relates to the technical field of photovoltaic power generation, in particular to a photovoltaic power station active power adjusting method, a photovoltaic power station active power adjusting device and a computer readable storage medium. Background As more photovoltaic power stations are connected to power generation, acceptance criteria for joint debugging of AGC (Automatic Generation Control, automatic power generation control) of the photovoltaic power stations are also higher. At present, the AGC joint debugging tests are standard, the closed loop of active multiple regulation must be completed within 25 seconds, the actual active curve is consistent with the target value curve, and the error is within 1% of the rated value range. For a flat-ground photovoltaic power station without shielding and other influences, the output level difference of each power generation unit (an inverter or a photovoltaic subarray) is small, and the AGC joint debugging requirement can be rapidly achieved only by using an open-loop control mode of average distribution. However, for a photovoltaic power station with a large difference in output of power generation units, such as a mountain photovoltaic power station, the power generation amount of each power generation unit at the same time is different, the target is difficult to achieve by one-time adjustment, and the adjustment times are too large and time is too long. Since the power generation capacity of each power generation unit is different and the average distribution regulation scheme cannot know the power generation capacity of each power generation unit at the time of power regulation, a plurality of corrections are required within the allowable regulation period. On the one hand, waveform jitter is caused, resonance is easy to generate to interfere with a power grid, and on the other hand, when power is lifted, a target value is tracked after multiple corrections, so that non-negligible power generation loss is caused. Disclosure of Invention The invention mainly aims to provide a photovoltaic power station active power adjusting method, a photovoltaic power station active power adjusting device, photovoltaic power station active power adjusting equipment and a computer readable storage medium, and aims to solve the technical problem that in the prior art, when the generated power of a photovoltaic power station is adjusted, the generated power of each power generation unit in the photovoltaic power station is difficult to accurately and rapidly distribute. In order to achieve the above purpose, the invention provides a method for regulating active power of a photovoltaic power station, comprising the following steps: Determining a weight coefficient of each power generation unit in the photovoltaic power station; determining power to be distributed according to the adjustment target power of the active power of the photovoltaic power station and the current active power of a preset full-power unit; And determining the actual regulating power of each power generation unit in the photovoltaic power station according to the power to be distributed and the weight coefficient, and regulating the current active power of each power generation unit to the actual regulating power. Optionally, the step of determining the weight coefficient of each power generation unit in the photovoltaic power station includes: Determining a current regulation scene corresponding to the regulation target power, and determining a history similar day similar to the current regulation scene; and determining the weight coefficient of each power generation unit in the photovoltaic power station according to the similar daily power of each power generation unit in the historical similar solar photovoltaic power station. Optionally, the step of determining a history of similar days to the current adjustment scenario includes: Acquiring current electrical parameters and current environmental parameters in the current regulation scene; And determining a historical similar day similar to the current adjustment scene according to the current electrical parameter and the current environment parameter. Optionally, the step of determining the weight coefficient of each power generation unit in the photovoltaic power station according to the similar daily power of each power generation unit in the historical similar solar photovoltaic power station includes: Determining a power ratio between the similar daily power of the preset full power unit and the similar daily power of all the power generation units except the preset full power unit in the photovoltaic power station by taking the similar daily power of the preset full power unit as a reference, and taking the power ratio as the weight coefficient of all the power generation units except the preset full power unit; the weigh