摘要
本文结合深圳多端柔性直流配电示范工程,研究了柔性直流配电网的保护方案及故障定位方法。根据实际工程的电路拓扑结构,明确了保护区域的划分方法。同时结合MMC换流器及直流配网的故障特性,提出了各保护区域的保护配置方案。着重介绍了直流线路单极故障、双极故障的保护配置方法,并通过PSCAD/EMTDC仿真验证了保护配置策略的正确性和直流线路故障定位的可行性。最后介绍了保护装置的实现形式,并通过保护与控制之间的相互配合,形成了自适应的柔直配网保护系统。
With the lauching of Shenzhen pilot project on MMC based DC distribution network, the protection scheme and fault loca-ting method are studied in this paper. Firstly, based on the topology structure of the actual project, the division method for the protec-tion area of DC distribution network is defined. Then, an overall protection configuration strategy is presented considering MMC andthe system＇s fault characteristic. Further protection for different DC line faults, including pole to ground fault, pole to pole fault andline disconnection fault, is described in detail. The correctness of the protection configuration strategy and the feasibility of the fault lo-cation method are validated through PSCAD/EMTDC simulation. Finally, the implementation of protection device is introduced, to-gether with coordination between protection and control, thus an adaptive protection system for MMC based DC distribution network isestablished.
出处
《南方电网技术》
北大核心
2015年第9期11-16,共6页
Southern Power System Technology
基金
国家高技术研究发展计划(863计划)(2013AA050104)~~
关键词
直流配电网
MMC换流器
保护配置
故障定位
DC distribution network
MMC based converter
protection configuration
fault locating
