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Voltage reactive power control method and device for photovoltaic power station

A voltage reactive power control, photovoltaic power station technology, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve the problems of frequent and inflexible reactive power source operation, maintain voltage stability, avoid frequent operation, and quickly adjust Effect

Inactive Publication Date: 2018-12-21
NR ELECTRIC CO LTD +1
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  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the embodiment of the present invention is to overcome the inflexibility of the traditional voltage automatic control scheme and the defects of frequent reactive power source operation, and provide a photovoltaic power station voltage and reactive power control method and device

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  • Voltage reactive power control method and device for photovoltaic power station

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Embodiment Construction

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific implementation manners of the technical solutions of the present invention will be described in more detail and clearly below in conjunction with the drawings and embodiments. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention. It only contains a part of the embodiments of the present invention, but not all of them. Other embodiments obtained by those skilled in the art through various changes of the present invention all belong to the protection scope of the present invention.

[0045] figure 1 It is a schematic flowchart of a method for controlling voltage and reactive power of a photovoltaic power station provided by an embodiment of the present invention, including the following steps.

[0046] In step S110, the reactive power control dev...

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Abstract

The invention provides a voltage reactive power control method and device of a photovoltaic power station. The method comprises the following steps: a reactive power control device dynamically calculates a sensitivity coefficient; dynamic calculating the next reactive power compensation value based on a sensitivity coefficient; and controlling the reactive power source to compensate the reactive power compensation value into the photovoltaic power station system. The invention can adjust the reactive power compensation value of the next control regulation in real time according to the voltagechange after each regulation. And with the continuous regulation, the number and frequency of reactive power source equipment control is less and less, avoiding the frequent operation of reactive power source equipment, to achieve rapid voltage regulation of photovoltaic power station, and effectively maintain the voltage stability of photovoltaic power station.

Description

technical field [0001] The invention relates to the field of automatic control of photovoltaic power plants, in particular to a method and device for controlling voltage and reactive power of photovoltaic power plants. Background technique [0002] At present, more and more photovoltaic power plants are being built. Automatic voltage control of photovoltaic power plants is an important link in photovoltaic power plants. [0003] The current automatic voltage control scheme commonly used in photovoltaic power plants is to pre-set the reactive power compensation value for each input, and each automatic voltage control system uses the pre-set reactive power compensation value for reactive power compensation. [0004] The inventors found that this scheme mainly has the following disadvantages: firstly, it lacks flexibility, and the voltage change caused after each reactive power compensation will directly affect the next reactive power compensation value, and the reactive power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 黄伟徐浩王小平冯传水陈丹瑜李忠安
Owner NR ELECTRIC CO LTD
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