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A method for regulating grid voltage

A grid voltage and regulator technology, applied in AC network voltage adjustment, reactive power compensation, etc., can solve problems such as inaccurate control results, reduce switching times, reduce large reactive current mutations, and improve power factor Effect

Active Publication Date: 2016-08-17
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is a coupling relationship between the grid-connected point voltage and the power factor, taking any parameter as the control object will affect the other parameter, resulting in inaccurate control results

Method used

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  • A method for regulating grid voltage
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  • A method for regulating grid voltage

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Embodiment Construction

[0047] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0048] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.

[0049] In addition, the steps shown in the flow dia...

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Abstract

The invention discloses a method for adjusting power grid voltage. The method includes the following steps that: a voltage control mode or and reactive power compensation mode are alternatively adopted according to the range of power grid voltage actual values, and the output reactive power reference value of a static var generator is obtained; the output reactive power current reference value of the static var generator is obtained according to the output reactive power reference value; and the output reactive power current actual value of the static var generator is obtained, and the output reactive power current of the static var generator is adjusted according to the output reactive power current actual value and the output reactive power reference value, and therefore, adjustment of the power grid voltage can be realized. With the method adopted, reactive power compensation and power grid voltage adjustment can be realized at the same time, and rapid and reliable adjustment of the power grid voltage can be realized.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a method for regulating grid voltage. Background technique [0002] In recent years, with the rapid development of wind power, photovoltaic and other new energy power generation industries, a large number of wind power and photovoltaic power stations have been integrated into the power grid, which has also brought many new problems to the power system. Among them, the problem of reactive power and voltage is the most prominent and One of the most concerned issues. [0003] For example, in a grid-connected wind power project, the step-up station is a key link in transmitting wind power to the grid. In the actual operation of wind farms, due to the intermittent and random nature of the wind, the wind turbines cannot generate electricity continuously and stably, and the unstable operation of the wind turbines will cause very large fluctuations in the voltage of the booste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 曹洋唐建宇仇乐兵林丽彭勃徐万良刘永丽周方圆吕顺凯杨磊陈孟君邱文俊蔡蔚秦灿华徐振初蕊王桂华李庆武
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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