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Photovoltaic power station reactive voltage control method

A voltage control method and technology for photovoltaic power plants, which are applied in photovoltaic power generation, reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the problem of not taking full advantage of the reactive power of photovoltaic inverters and dynamic reactive power compensation. Problems such as the rapidity of device adjustment

Active Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +5
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for controlling the reactive voltage of a photovoltaic power station in view of the problem that the prior art does not take into account the problem of fully utilizing the reactive power of the photovoltaic inverter and the rapidity of the adjustment of the dynamic reactive power compensation device

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  • Photovoltaic power station reactive voltage control method
  • Photovoltaic power station reactive voltage control method
  • Photovoltaic power station reactive voltage control method

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Embodiment Construction

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0037] figure 1 The control idea of ​​the method of the present invention is shown. According to the reactive power setting value of the photovoltaic power station and the bus voltage of the grid-connected point of the photovoltaic power station, the present invention provides a reactive power distribution method for the photovoltaic power station, specifically including: figure 2 The following steps are shown.

[0038] Step A: The photovoltaic power station receives the reactive power set value Q of the photovoltaic power station issued by the dispatching center target and photovoltaic power station grid-connected point voltage reference value U target , or you can set the reactive power setting value Q of the photovoltaic power station by yourself in the photovoltaic power station target and photovoltaic power station grid-connected point vo...

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Abstract

The invention discloses a photovoltaic power station reactive voltage control method, and belongs to the technical field of electric power system control. According to the photovoltaic power station reactive voltage control method, a reactive distribution method of a photovoltaic power station is provided according to a photovoltaic power station reactive set value and photovoltaic power station grid connection point bus voltage. Reactive capability of a photovoltaic inverter and rapidity of adjustment of a dynamic reactive power compensation device can be both fully utilized so that rapid and continuous reactive coordinated control of the photovoltaic inverter and the dynamic reactive power compensation device can be actually realized, and thus the reactive voltage requirement of a power grid for the photovoltaic power station can be met.

Description

technical field [0001] The invention belongs to the technical field of electric power system control, and more precisely, the invention relates to a reactive power voltage control method of a photovoltaic power station. Background technique [0002] Solar energy is random and uncontrollable. Solar energy resources themselves have the characteristics of randomness, intermittent, periodicity and volatility. The output of photovoltaic power plants using solar energy as energy also has the above characteristics. As the proportion of photovoltaic power generation in the power supply continues to increase, the grid-connected photovoltaic power supply has a non-negligible impact on the voltage quality of the distribution network and the high-voltage transmission network. In order to adapt to the grid-connected operation of large-scale photovoltaic power generation, it is necessary to pay attention to the research on the control of reactive power and voltage of photovoltaic power pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E10/56Y02E40/30
Inventor 许士光张海宁孟可风马勇飞李春来杨立滨孙伟伟
Owner STATE GRID CORP OF CHINA
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