Research on Calculation Method of Microgrid Relay Protection Rectification under New Energy Access
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.
New energyMicrogridRelay protectionRectification calculationTree nodeParticle swarm optimization algorithmLocal extreme valueFault current
万方数据
维普
