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LAN-Based Protective Relaying for Interconnect Protection of Dispersed Generators  

Jyung, Tae-Young (국립 경북대 공대 전기공학과)
Baek, Young-Sik (국립 경북대 공대 전기학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.3, 2007 , pp. 491-497 More about this Journal
Abstract
As dispersed generators was driven in condition interconnecting with utility, it could cause a variety of new effects to the original distribution system that was running as considered only the one-way power flow. Therefore, the protection devices that is builted in distribution system should be designed to be able to operate with disposing of not only a fault of the generator, but also utility condition. Especially, the fault of the feeder interconnected with Dispersed Generator can cause the islanding phenomenon of open DG(Dispersed Generators). This phenomenon has many problems such as a machinery damage, electricity qualify degradation and a difficulty of the system recovery. In the fault therefore, we must separate Dispersed Generator from the system quickly. In this paper, for the fault classification of the interconnected DG and the outside feeder we judge the fault of the interconnected DG and the outside feeder in HMI through data provided by IED(Intelligent Electronic Device) on the network and decide whether it operates or not by sending the result to each relay.
Keywords
DG; IED; Protective; HMI; LAN;
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