Adaptive PI double-closed loop control method for static var generator

A double closed-loop control, static reactive power technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation and other directions, can solve the problems affecting the application of static var generators, fast control speed, less strict and so on

Active Publication Date: 2019-05-24
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two problems have affected the application of static var generators in distribution network sites
Among them, the P regulator is a proportional control, which cann

Method used

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  • Adaptive PI double-closed loop control method for static var generator
  • Adaptive PI double-closed loop control method for static var generator
  • Adaptive PI double-closed loop control method for static var generator

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Embodiment Construction

[0033] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" a...

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Abstract

The invention relates to an adaptive PI double-closed loop control method for a static var generator. The method includes the following steps that: a grid voltage is sampled, a grid angle is obtained,the upper bus-bar voltage and lower bus-bar voltage of a direct-current bus-bar are collected; a total bus voltage is calculated; an active axis voltage stabilized direct-current component is calculated; an alternating-current active current component required by three-phase voltage stabilization is calculated; a direct-current component is calculated; the total command of a current loop is calculated; an adaptive PI regulator is adopted to perform control, so that three-phase modulation waves can be obtained; modulation is performed, so that driving pulses are obtained; and an inverter is driven to obtain reactive current output. With the adaptive PI regulator used in a double-closed loop control system adopted, the defects of low response speed and poor following performance of a traditional regulator when the operation conditions of the system change can be eliminated; PI parameters are automatically adjusted according to the change of the operating conditions; and therefore, the whole control system is adjusted to operate in an optimal working state. Thus, the adaptive PI double-closed loop control method can effectively adapt to application scenes in which a plurality of working conditions change and has a broad application prospect.

Description

technical field [0001] This application relates to the field of power electronic control, in particular to an adaptive PI double-closed-loop control method for static var generators. Background technique [0002] There is a very large market space in the field of reactive power compensation. In the past, it was mostly the reactive power compensation demand of industrial sites. Because of the consideration of power factor in industrial sites, reactive power compensation has become a rigid demand, but most of them are three-phase three-phase. In the past few decades, passive compensation equipment such as capacitors was mostly used. Later, due to the performance advantages of active static var generators and the gradual reduction in prices, the application of static var generators is increasing. There is a tendency to gradually share the reactive power market with passive ones. With the guidance of the market, the static var generator has become a very hot research hotspot. ...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 莫文雄熊俊伍衡栾乐许中叶志峰马智远周凯郭倩雯崔屹平刘伟明李智宁王荣富陈硕周乐
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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