Relay protection setting calculation system in distribution networks

With continuous development of distribution power network, the higher reliability of distribution system is required. Fault and its impact must be reduced to ensure reliable power supply in the operation of distribution network, so the relay protection is paid more and more attention. The existing relay allocation and settings systems are mostly suitable for high voltage power network and can´t adapt to distribution network very well, because the distribution network is quite different from high-voltage network in topology, component properties and operation mode.