Analysis of Self-healing Mode in 10 kV Distribution Network
The core content of self-healing technology of distribution network automation is to achieve automatic switching,fault isolation and restoration of grid power supply through the self-healing control terminal device,with the goal of improving the anti-interference ability and reliability of the power grid.The demand for self-healing technology in the face of scale expansion and new energy access is discussed,and various self-healing mode strategies and their advantages and disadvantages are analyzed.Taking the starting point of emphasizing the fast isolation and power restoration capability when fault occurs,the strategies of master station centralized type,master station and differential protection synergy type,voltage-time type and differential and voltage-time hybrid typeare analyzed in detail.The analysis results show that the master station centralized strategy has the advantages of high flexibility and strong adaptability,but has high requirements for communication and module quality;the differential protection can quickly realize fault isolation,but needs to work together with the master station;the voltage time type is suitable for simple grid structure;and the hybrid type combines many advantages has a wider applicability.Finally,combining with the engineering practice and considering to guarantee the reliability and efficient operation of the distribution network,it is proposed that the selection of feeder automation should be differentiated according to the characteristics of the power supply area and the actual demand.
distribution networkself-healing control strategyfeeder automation selectionmaster centralized strategydifferential protection
NETL
NSTL
万方数据
