Research on Overvoltage and Insulation Coordination of Flexible DC System for Offshore Wind Farm Integration

CHEN Qing; XUE Yuan; WANG Ke; ZHANG Zheren; XU Zheng; YANG Linchao; XU Yuzhe

doi:10.13296/j.1001-1609.hva.2019.04.025

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Research on Overvoltage and Insulation Coordination of Flexible DC System for Offshore Wind Farm Integration

更新时间：2025-04-26

- Research on Overvoltage and Insulation Coordination of Flexible DC System for Offshore Wind Farm Integration
- High VoltageApparatus Vol. 55, Issue 4, Pages: 178-184(2019)
- 作者机构：
  
  1. 中国电建集团华东勘测设计研究院有限公司
  2. 浙江大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.04.025
  CLC： TM721.1
- Published：2019
- 稿件说明：
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[1]陈晴,薛源,王克,张哲任,徐政,杨林超,徐雨哲.用于海上风电并网的柔性直流系统过电压和绝缘配合研究[J].高压电器,2019,55(04):178-184.

CHEN Qing, XUE Yuan, WANG Ke, et al. Research on Overvoltage and Insulation Coordination of Flexible DC System for Offshore Wind Farm Integration[J]. High voltageapparatus, 2019, 55(4): 178-184.
[1]陈晴,薛源,王克,张哲任,徐政,杨林超,徐雨哲.用于海上风电并网的柔性直流系统过电压和绝缘配合研究[J].高压电器,2019,55(04):178-184. DOI： 10.13296/j.1001-1609.hva.2019.04.025.

CHEN Qing, XUE Yuan, WANG Ke, et al. Research on Overvoltage and Insulation Coordination of Flexible DC System for Offshore Wind Farm Integration[J]. High voltageapparatus, 2019, 55(4): 178-184. DOI： 10.13296/j.1001-1609.hva.2019.04.025.

摘要

柔性直流系统凭借其独特的技术优势

正逐渐成为大规模远距离海上风电并网的主流方案。鉴于国内外相关研究较为匮乏

文中针对用于海上风电并网的柔性直流系统

详细研究了其中的过电压和绝缘配合问题。首先介绍了用于海上风电并网的柔性直流系统的基本情况

包括拓扑结构、站内主要设备和接地方式。然后根据实际情况详细介绍了过电压和绝缘配合的基本原则

包括典型故障选取、电压观测点选取、避雷器的配置方案和参数选择方法。再基于电磁暂态仿真平台PSCAD/EMTDC

搭建了国内某规划海上风电场的±320 kV/1 100 MW柔性直流送出系统仿真模型;基于时域仿真

研究了柔性直流系统的过电压特性

并且基于提出的避雷器的配置方案

给出了柔性直流换流站的主设备绝缘水平。研究成果填补相关领域研究的空白

可为未来国内类似工程提供重要的参考依据。

Abstract

With its unique technical advantages

flexible DC system is gradually becoming the mainstream scheme for large-scale offshore wind farm integration. Considering the lack of related research at home and abroad

this paper analyzes the overvoltage protection and insulation coordination of flexible DC system on this occasion. First

the basic layout of the flexible DC system is introduced

including the topology

the main electrical equipment in converter station and the grounding schemes. Second

basic principles for studying the overvoltage protection and insulation coordination are discussed

which mainly involves the selection of the typical fault

the voltage observation point

and the configuration scheme of arresters. Last

based on a planning ±320 kV/1 100 MW flexible DC system for wind farm integration

the simulation is carried out on PSCAD/EMTDC

and the overvoltage characteristics are studied. The paper also determined the insulation levels of the main electrical equipment. The research conclusions fill the gap in this field

which could serve as an important reference for similar practical projects in the future.

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