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Development of a large capacity static var compensator capable of high efficiency and quick response

高效率、快速响应的大容量静止无功补偿器的研制

基本信息

批准号：
05555082
负责人：
AKAGI Hirofumi
金额：
$ 3.58万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555082/
关键词：
Reactive power GTO thyristors Voltage-source inverters Switching losses Snubbing losses Power system stabilization 無効電力補償装置

项目摘要

In recent years, attention has been paid to advanced static var compensators (ASVC) of 50-300MVA consisting of voltage-source inverters using GTO thyristors not only for improving power factor but also for stabilizing transmission systems. The ASVCs can adjust the amplitude of output voltage of the inverters by means of PWM or non-PWM operation, thus producing either leading or lagging reactive power. In practical applications of large capacity ASVCs to power systems, high efficiency is the first priority as well as high reliability be.In this research, a dc voltage-controlled ASVC of 10kVA,consisting of quad-series voltage-source non-PWM inverters, was developed and tested by the authors. The following items are clarified by analysis and experiment.1.It was verified by experiment that quick control of reactive power with a time constant of 5ms, which had been considered to be impossible, was achieved by adding a feedback control loop. The experimental result agreed well with the analytical one.2.It was verified by experiment that a lossless snubbing circuit proposed by the authors works well, resulting in a reduction of switching losses and electromagnetic noises.3.It was pointed out by analysis and experiment that series or parallel resonance may occur between the dc capacitor and line inductance so that the capacity of the dc capacitor has to be designed to avoid the resonance.

近年来，由GTO晶闸管构成的50- 300 MVA电压源型逆变器构成的先进静止无功补偿器（ASVC）不仅可以提高功率因数，而且可以稳定输电系统，已引起人们的重视。ASVC可以通过PWM或非PWM操作来调节逆变器输出电压的幅度，从而产生超前或滞后的无功功率。在大容量ASVC的实际应用中，高效率和高可靠性是第一位的，在这项研究中，直流电压控制的ASVC的10 kVA，由四个串联的电压源非PWM逆变器，作者开发和测试。通过分析和实验，阐明了以下几点：1.通过实验验证，通过增加一个反馈控制环，实现了时间常数为5 ms的无功功率快速控制，这在过去被认为是不可能的。实验结果与理论分析结果吻合较好。2.通过实验验证了本文提出的无损耗缓冲电路的有效性。3.通过分析和实验指出，直流电容器与线路电感之间可能发生串联或并联谐振，因此必须设计直流电容器的容量，以避免直流电容器与线路电感之间发生串联或并联谐振。共振