电网技术2017，Vol.41Issue(6)：1703-1709,7.DOI:10.13335/j.1000-3673.pst.2016.3042
海上风电直流输电系统断线故障保护及恢复策略
A Fault Protection Strategy and Restorative Strategy for DC System Incorporating Offshore Wind Farm Under Open DC Line Fault
摘要
Abstract
Based on a simplified bipolar DC system topology for offshore wind power transmission, corresponding key components and control strategies are discussed in detail. Firstly, this paper analyses fault characteristics of the DC system under permanent open DC line fault. A fault protection strategy combining DC switch action and voltage source converter (VSC) blocking is proposed to restrain post-fault overvoltage and protect the devices near fault position so that the fault can be isolated from the system quickly and safely. The system needs to restore after fault clearance. This paper proposes a parallel restorative control strategy to restart outage devices of the system quickly and smoothly. Simulation model of the system is built under PSCAD/EMTDCTM environment. Simulation results demonstrate feasibility and validity of the proposed fault protection strategy and restorative control strategy.关键词
海上风电/直流输电系统/直流断线故障/故障保护策略/并行恢复策略Key words
offshore wind power/DC system/open DC line fault/fault protection strategy/parallel restorative control strategy分类
信息技术与安全科学引用本文复制引用
赵越,石立宝,姚良忠,徐政..海上风电直流输电系统断线故障保护及恢复策略[J].电网技术,2017,41(6):1703-1709,7.基金项目
国家电网公司专项资助项目(国家电网科研(2013)304号). Project Supported by State Grid Corporation of China under the Contract State Grid Research 304 (2013). （国家电网科研(2013）
