| In recent years,the wide application of distributed generation(DG),big data,artificial intelligence and other technologies has put forward higher requirements for the stable operation of the power grid and the improvement of power efficiency.By realizing the self-healing control of the distribution network,the comprehensive quality of power energy of the grid can be fully guaranteed,which plays a great role in improving the management of the grid and the operation and maintenance of equipment.Firstly,the paper combs the operation characteristics of the distribution network with DG,and puts forward the fault location analysis method,fault recovery operation method and specific operation process of the distribution network with DG in combination with the basic principles of traditional power network fault recovery,which provides theoretical support for fault recovery and network reconfiguration.The paper then analyzes the application of different voltage criteria for permanent and transient faults in the traditional power grid.Based on the effect of DG on the local feeder automatic intelligence,the reclosing action mode and protection coordination mode of the distribution network with DG are redesigned.Through the power flow simulation of the distribution network,optimization suggestions for reclosing protection coordination are proposed.The paper also analyzes the characteristics of the self-healing control system in combination with the requirements of the new power system,and systematically summarizes the characteristics,functional structure diagram,application modules and operation flow of the self-healing control system of the centralized and distributed coordinated intelligent self-healing control system.Focusing on the switch refused to operate,the protection configuration is optimized and analyzed.Finally,taking the electrical layout design of a regional power grid as an example,the specific configuration of the distributed feeder automation self-healing method is introduced in detail,and the typical application analysis of the rapid self-healing protection of the distribution network is completed.Through the research on the fault self-healing control of distribution network,we can further deepen the systematic understanding of the new power grid fault resolution and recovery.Under the background of rapid changes in various grid technologies,only by strengthening interdisciplinary integration and research,Respond to different conditions in practical application,and ensure the safety,reliability,economy and greenness of power supply.Only by constantly advancing,continuously optimizing the available resources of the power grid,making the power grid bigger and stronger,and promoting the deep integration of disciplines. |
