Fault Transient Voltage Support Control for Large-scale Renewable Power Plant Connecting to Weak Grid

Yang ZHANG; Ke JIA; Tianshu BI; Xinying JIANG; Yun LIU

doi:10.13334/j.0258-8013.pcsee.232695

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Fault Transient Voltage Support Control for Large-scale Renewable Power Plant Connecting to Weak Grid

Power Systems | 更新时间：2026-02-05

- Fault Transient Voltage Support Control for Large-scale Renewable Power Plant Connecting to Weak Grid
- Proceedings of the CSEE Vol. 45, Issue 13, Pages: 4956-4966(2025)
- 作者机构：
  
  新能源电力系统国家重点实验室(华北电力大学), 北京市昌平区 102206
- 作者简介：
- 基金信息：
  
  National Key R&D Program of China(2022YFB4202302)
- DOI：10.13334/j.0258-8013.pcsee.232695
  CLC： TM73
- Received：07 December 2023，
  
  Online First：23 April 2024，
  
  Published：05 July 2025
- 稿件说明：
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Yang ZHANG, Ke JIA, Tianshu BI, et al. Fault Transient Voltage Support Control for Large-scale Renewable Power Plant Connecting to Weak Grid[J]. Proceedings of the CSEE, 2025, 45(13): 4956-4966.
DOI：

Yang ZHANG, Ke JIA, Tianshu BI, et al. Fault Transient Voltage Support Control for Large-scale Renewable Power Plant Connecting to Weak Grid[J]. Proceedings of the CSEE, 2025, 45(13): 4956-4966. DOI： 10.13334/j.0258-8013.pcsee.232695.

摘要

在规模化新能源场站接入弱电网的场景中，网侧难以在故障期间提供电压支撑，可能导致新能源大面积脱网，并引发系统性安全问题。因此，亟需研究新能源场站的故障暂态电压支撑控制技术。然而，现有的新能源低穿控制策略仅能确保自身的安全穿越，对系统侧的安全性考虑不足。针对该问题，提出一种基于扩展可控边界的新能源场站故障暂态电压支撑控制策略；计及系统故障扰动传播影响，构建新能源场站的扩展可控边界，并提出一种基于分群离散映射矩阵的控制指令计算方法；参考我国南疆“新能源接入极弱电网示范运行基地”的典型场景，在PSCAD搭建相应的仿真算例。验证结果表明，在所提方法下，新能源场站能够为系统提供安全、尽限、快速、灵活的故障暂态电压支撑能力。相比现行国标，在场站并网点电压跌落不低于0.4 pu情况下，新能源场站的故障暂态电压支撑能力至少提高40% 以上。

Abstract

In the scenario of large-scale renewable power plant(RPP) connecting to weak grid

the opposite weak grid has difficulties in providing voltage support capacity during faults

leading to off-grid of RPP and causing safety problems of the whole system. Therefore

large-scale RPP must possess fault transient voltage support capability. However

existing methods ensure only the self-protection of RPP

without guaranteeing power grid security. To address this limitation

a novel fault transient voltage support control strategy based on extended controllable boundary is proposed. The fault disturbance propagation is considered to build the extended controllable boundary

and the current command values are calculated through the grouping discrete mapping matrix. Referring to a typical scenario in Xinjiang

China

a simulation example is constructed in PSCAD. The validation results show that the RPP can safely

exhaustively

rapidly and flexibly provide transient voltage support capacity. When the voltage at point of common coupling (PCC) sags is higher than 0.4 pu

the system achieves at least 40% greater improvement compared to the current national standard.

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references

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