To improve the effectiveness of relay protection rectification calculation and the accuracy of relay protection device action,the calculation method of microgrid relay protection rectification under new energy access is researched.A tree node search method is adopted to search for new energy that provide fault current for the relay protection to calculate the relay protection action current by rectification.The objective function is to minimize the action time of relay protection rectification calculation,and the model of relay protection action time rectification calculation is established.The concepts of local extreme value and particle discretization are introduced,and an improved particle swarm optimization algorithm is designed.The calculation model of relay protection action time is solved rectification to get the calculation result of minimum relay protection action time rectification.The experimental results prove that the method can effectively rectificate calibrate the microgrid relay protection action current and action time and improve the accuracy of the relay protection action;the method is still able to carry out effective calculations in different fault current direction angles.The research can better guarantee the stability of power supply to users and provide reference for the flexible scheduling of subsequent power systems.
关键词
新能源/微电网/继电保护/整定计算/树形节点/粒子群优化算法/本地极值/故障电流
Key words
New energy/Microgrid/Relay protection/Rectification calculation/Tree node/Particle swarm optimization algorithm/Local extreme value/Fault current
维普
万方数据