Residual Current Protection Method for Medium and Low Voltage DC Distribution Network Based on Improved Random Forest Algorithm
In order to solve the problem of electric shock and electrical fire caused by residual current,a protection method based on im-proved random forest algorithm for medium and low voltage DC distribution network is proposed.Real-time residual current amplitude data of nodes are collected by the intelligent monitoring terminals and transmitted to the workstation backend.The improved random for-est algorithm is used to detect the residual current and control the circuit breaker to eliminate the fault.A research object model is con-structed by using MATLAB software,and the results show that the accuracy and recall of fault detection results can be maintained at over 97%.The protection of low-voltage DC residual current is realized by means of shunt release and micro-break,and a hybrid circuit breaker suitable for medium voltage is designed.The test shows a good discrimination of different types of residual current faults.
random forest algorithmDC distribution networkresidual current protectioncurrent amplitude informationcircuit breaker
万方数据
维普
