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Control method for stabilizing output fluctuation of photovoltaic power station, photovoltaic power station and storage medium

A photovoltaic power station and control method technology, which is applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve the problems of out-of-limit operation conditions of the energy storage control system and the impact of battery life, so as to reduce operation and maintenance costs and smooth output fluctuations. , the effect of extending battery life

Active Publication Date: 2021-03-12
STATE GRID E COMMERCE CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0005] Photovoltaic power stations and storage media are used to solve the technical problems that unreasonable energy storage control will lead to system operating conditions exceeding the limits, and battery overcharge or overdischarge will affect battery life.

Method used

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  • Control method for stabilizing output fluctuation of photovoltaic power station, photovoltaic power station and storage medium
  • Control method for stabilizing output fluctuation of photovoltaic power station, photovoltaic power station and storage medium
  • Control method for stabilizing output fluctuation of photovoltaic power station, photovoltaic power station and storage medium

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] In the first aspect, an embodiment of the present invention provides a control method for stabilizing output fluctuations of photovoltaic power plants, such as figure 1 As shown, the method includes:

[0027] S101. Obtain the output power value of the photovoltaic power station at the first moment and the state of charge of the battery pack at the first moment;

[0028] S102. Calculate a smoothed grid-connected reference va...

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Abstract

The embodiment of the invention discloses a control method for stabilizing output fluctuation of a photovoltaic power station, a photovoltaic power station and a storage medium. The method comprises the following steps: obtaining a photovoltaic power station output power value at a first moment and a state of charge of a storage battery pack at the first moment; according to the photovoltaic powerstation output power value obtained at the first moment, calculating a smoothed photovoltaic power station grid connection reference value; comparing the photovoltaic power station output power valueat the first moment with the smoothed photovoltaic power station grid connection reference value; determining an instruction of controlling an energy storage system to charge and discharge accordingto a comparison result; setting a volatility correction coefficient and a correction coefficient of the state of charge of the storage battery pack; and calculating the output power value of the energy storage system at the first moment according to the volatility correction coefficient and the correction coefficient of the state of charge of the storage battery pack. The embodiment of the invention can realize coordinated control of the charging and discharging output of the energy storage system, smooth the output power of the photovoltaic power station, reduce the influence of power fluctuation of the photovoltaic power station on the power grid, prolong the battery life and reduce the operation and maintenance cost of the system.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of new energy power generation, and in particular to a control method for smoothing output fluctuations of a photovoltaic power station, a photovoltaic power station and a storage medium. Background technique [0002] With the continuous development of new energy and the large-scale grid connection of photovoltaic power plants, the problem of output fluctuations has become increasingly serious. Since photovoltaics are renewable energy, its output is affected by factors such as climate, terrain, and light, resulting in uncertainty in its output. Strong intermittency, randomness and other characteristics, with the continuous increase of photovoltaic penetration, have brought great challenges to the safe and reliable operation of the power grid. With the increasing proportion of grid-connected photovoltaic power plants in the grid, the smooth control of the output power of photovoltaic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/383H02J3/32Y02E10/56Y02E70/30
Inventor 沈子奇谢祥颖李洋骆欣薛晓迪孟凡滕葛乐矣杜骏王少婷单雨
Owner STATE GRID E COMMERCE CO LTD
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