Research On The Coordination Between Splitting And Protection Relay Of Foshan Power Grid

Black Start is the procedure to recover from a total or partial shutdown of the transmission system which has caused an extensive loss of supplies. This entails isolated power stations being started individually and gradually being reconnected to each other in order to form an interconnected system again. Foshan Power Grid will lose black start resources along with more and more plants are shut down. Based on the situation, this paper focuses on how to form an island by splitting when fatal faults happen to the grid. Then this island is regarded as a black start resource to help the power grid restoration. Besides, how to coordinate the automatic devices and protection relay is also discussed in this paper. The purpose is to explore the ability to cope with great faults and to speed up the restoration process.Based on systemic analysis of the datas of Foshan Power Grid, the paper focuses on studying an enterprise owned plant, which uses the form of central heating, and half of the power is supplied to its own load. All these characteristics will help with the programme of islanding operation. Before power grid collapses and when the grid loses its connection with outer resoureces, it can split the plant and its related substation and load by the help of coordination between automatic devices and protection relay. Then the restoration could be relized by use the island as a black start resource.According to the actual situation of Foshan Power Grid, a proper black start project together with the object power network is designed. Then the detail process of power grid restoratioin is form to guide the whole black start. Besides, the paper provides a detail emergency response plan for Jiangnan and Changhai plants for their important role in black start when black out happens.It is of great sense to study the Coordination between Splitting and Protection Relay of Foshan Power Grid. The datas and plant are derived from an actual grid. The results are similar to the real power grid, which can provide significant guiedance and ensure the stable operation of Foshan Power Grid.