Overvoltage Mechanism and Suppression Strategy for Inverters in Weak Grids

GE Luming; TANG Yong; ZHU Lingzhi; CHEN Ning; TAO Yibin; {{custom_author.name_en}}

doi:10.13334/j.0258-8013.pcsee.242978

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Overvoltage Mechanism and Suppression Strategy for Inverters in Weak Grids

更新时间：2026-10-12

- Overvoltage Mechanism and Suppression Strategy for Inverters in Weak Grids
- Vol. 46, Issue 6, Pages: 2289-2302(2026)
- 作者机构：
  
  1. 可再生能源并网全国重点实验室(中国电力科学研究院有限公司)，北京市海淀区,100192
  2. 中国电力科学研究院有限公司，北京市海淀区,100192
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.242978
  CLC：
- Received：20 March 2026，
  
  Published：2026
- 稿件说明：
移动端阅览
GE Luming, TANG Yong, ZHU Lingzhi, et al. Overvoltage Mechanism and Suppression Strategy for Inverters in Weak Grids[J]. 2026, 46(6): 2289-2302.
DOI：

GE Luming, TANG Yong, ZHU Lingzhi, et al. Overvoltage Mechanism and Suppression Strategy for Inverters in Weak Grids[J]. 2026, 46(6): 2289-2302. DOI： 10.13334/j.0258-8013.pcsee.242978.

摘要

国内外多次发生由过电压引发的新能源脱网事故，过电压问题已成为制约新能源发展的突出矛盾，尤其是在容易发生电压波动的弱电网中。文中根据时间尺度的长短，对短时间尺度的瞬态过电压和长时间尺度的工频过电压问题分别开展机理和抑制策略研究。首先，基于受控电压源模型分析瞬态过电压的产生机理；其次，基于受控电流源模型分析工频过电压的产生机理；然后，提出一种面向不同时间尺度的自适应过电压抑制策略，通过引入自适应可变调压系数，抑制瞬态过电压，通过吸收附加无功电流，抑制工频过电压；最后，进行实验验证。结果表明，所提策略对两种过电压问题均具有较好的抑制效果。

Abstract

There have been many renewable energy tripping accidents caused by overvoltage all over the world

and the overvoltage has become a prominent issue restricting the development of renewable energy

especially in weak grids prone to voltage fluctuations. According to the span of the time scale

the mechanism analysis and suppression strategy of transient overvoltage in the short time scale and power frequency overvoltage in the long time scale are studied in this paper. Firstly

the mechanism of transient overvoltage is analyzed based on the controlled voltage source model. Secondly

the mechanism of power frequency overvoltage is analyzed based on the controlled current source model. Then

an adaptive overvoltage suppression strategy for different time scales is proposed. Transient overvoltage is suppressed by introducing the adaptive variable voltage regulation coefficient

and power frequency overvoltage is suppressed by absorbing additional reactive current. Finally

experiments are carried out. The experimental results show that the proposed strategy in this paper has a good suppression effect on both types of overvoltage issues.

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