Study on Control Technology of Protective Relays in Multi-terminal Flexible DC Distribution Networks
In order to ensure stable and safe operation of flexible DC distribution networks,this paper studies the protective relay control technology for multi-terminal flexible DC distribution networks.A mathematical model of a multi-terminal flexible DC distribution network is established and divided into several control sections according to the distribution system structure.Each section includes corresponding converters,DC transformers,and DC lines.Then fault recorders are used to quickly locate and isolate DC line faults,thereby realizing protective control.The designed method is verified by experiment capable of achieving rapid identification and control of operational faults in distribution networks and ensuring normal operation of multi-terminal flexible DC distribution networks and stability in power supply services.
DC distribution networkmulti-terminal flexibilityprotective relayfault locationisolation control
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