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Different from traditional utility grid, a microgrid contains a lot of VSC (voltage source converter) interfaced distributed generators which has more controlled variables than the common used synchronous generator. VSC can be operated in active power - reactive power (PQ) mode, active power - voltage (PV) mode, voltage - frequency mode (Vf), etc. The control strategy selection has large impact on...
An effective introduction of distributed generation (DG) into existing distribution networks (DNs) calls for a review of traditional power system protection concepts and strategies. New issues such as activeness of DNs and bidirectional power flow require new protection solutions. This paper discusses protection issues and challenges arising from the integration of DG into the grid. It presents and...
The paper analyses the existed protection of microgrid. And in order to meet the requirements of microgrid protection, a novel protection is presented in this paper. The protection based on local information without the need of communication, uses current traveling waves to identify faulted feeder, and the bus bar voltages to determine a event caused by fault or switch operation. In the protection...
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