Architecture of centralised protection suiting future development trend of distribution network

With the deepening of China's urbanisation and the trend of multi-source distribution network is more and more obvious, traditional local protection cannot solve the new emerging fault recognition problems. Urban land tension makes the construction and reconstruction of substation particularly difficult; furthermore, long recovery time of secondary equipment becomes the bottleneck restriction of power system restoration after catastrophe. This study proposes an integration secondary equipment-based new architecture of distribution network named Protection Intelligent Centre. The centre takes over most functions of the former substation protection and automation. On one hand, the centre can optimise protection principle. On the other hand, the centre also alleviates the pressure of substation area in the city by concentrating the substation's secondary equipment and simplifies the rebuilding process after the disaster of regional grid. Then explain the function concept, overall architecture, configuration and rapid disaster recovery of protection Intelligent Centre. This architecture provides a reference for the construction of urban intelligent power distribution substation.