Flexible Voltage Support and Control of Distributed Power Inverter at Grid Fault

SUN Shaojie

doi:10.14044/j.1674-1757.pcrpc.2016.06.016

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Flexible Voltage Support and Control of Distributed Power Inverter at Grid Fault

更新时间：2024-09-14

- Flexible Voltage Support and Control of Distributed Power Inverter at Grid Fault
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 37, Issue 6, Pages: 88-94(2016)
- 作者机构：
  
  塔里木大学机械电气化工程学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2016.06.016
  CLC： TM464
- Published：2016，
- 稿件说明：
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[1]孙少杰.分布式发电逆变器在电网故障下的柔性电压支持控制[J].电力电容器与无功补偿,2016,37(06):88-94.

SUN SHAOJIE. Flexible Voltage Support and Control of Distributed Power Inverter at Grid Fault. [J]. Power capacitor & reactive power compensation, 2016, 37(6): 88-94.
[1]孙少杰.分布式发电逆变器在电网故障下的柔性电压支持控制[J].电力电容器与无功补偿,2016,37(06):88-94. DOI： 10.14044/j.1674-1757.pcrpc.2016.06.016.

SUN SHAOJIE. Flexible Voltage Support and Control of Distributed Power Inverter at Grid Fault. [J]. Power capacitor & reactive power compensation, 2016, 37(6): 88-94. DOI： 10.14044/j.1674-1757.pcrpc.2016.06.016.

摘要

分布式发电系统随着规模扩张

其并网后的电网适应性已成为一个核心技术问题

尤其是不同电网故障后如何对电网进行有效的电压支持。针对这个问题

本文提出一种分布式发电逆变器在电网故障时的柔性电压支持控制策略

该控制策略不同于传统的电网支持控制方案

其灵活性体现在若出现三相电压平衡跌落

则注入无功功率提高每相电压

若出现单相或者两相不对称故障

则尽量控制电压平衡

消除电压负序分量

减小相位突变。搭建了试验平台

对2种不同电网故障下的电压支持控制开展了试验研究

试验结果表明在新型柔性电压支持控制策略下

故障后的电网电压得到了有效的支持

控制策略得到了验证。

Abstract

With the expansion of the scale of the distributed power generation system

its adaptability to the grid after grid connection has become a key technical problem

especially on how to perform effective voltage support to the grid after the fault in different grids. As for this issue

the flexible voltage support and control strategy of a kind of distributed power inverter at grid fault is proposed in this paper. The flexibility of the control strategy

unlike the traditional power grid support and control scheme

is reflected in the voltage improvement per phase by way of injecting reactive power in case of three-phase voltage balance sag

control of voltage balance

elimination of negative sequence component of voltage and reduction of phase mutation in case of one phase or two-phase asymmetrical fault. The test platform is set up

and test research of voltage support and control at two types of power fault is developed. It is shown by the test result that at the support and control strategy of new type of flexible voltage the grid voltage is effectively supported after the fault and the control strategy is verified.

关键词

分布式发电逆变器无功功率控制电压穿越电压跌落电压支持

Keywords

distributed generationinverterreactive power controlvoltage ride throughvoltage sagvoltage support

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