柔性直流交流连接区故障分析

Power System Protection and Control(2020)

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Abstract
描述常规特高压直流输电工程现状,展望柔性直流输电前景,介绍基于VSC模块化多电平换流器(modular multi-level converter)技术直流输电的基本原理.根据渝鄂背靠背直流输电工程柔性直流一次拓扑结构,搭建实时数字仿真器(RTDS)仿真模型.结合仿真验证结果,分析交流连接线区充电软启电阻切除前、解锁软启电阻切除后故障时的故障暂态及稳态特性.通过对柔性直流阀侧故障特性及阀侧故障时阀控本体过压过流现象的研究,设计针对于柔性直流的保护配合策略.
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