Correlation pilot protection of high wind and photovoltaic power penetration distribution network based on 5G
In the high wind and photovoltaic power penetration distribution network,under the influence of the control strategy for inverter,the fault current weak-feed characteristic is obvious,the traditional power frequency protection's operation performance is declining,and even cause unwanted operation or refuse operation.In this paper,the fault current characteristics of synchronous generator and inverter interfaced distributed generation power supply are analyzed,and it is found that there is an obvious difference between the fault current vectors on both sides of the distribution network during internal and external faults,and then the correlation coefficient is used to measure the vector correlation and construct the action criteria.Based on 5G communication technology,a new scheme of correlation pilot protection for high wind and photovoltaic power penetration distribution network is proposed.The simulation results show that the proposed protection scheme can identify the short circuit fault of high wind and photovoltaic power penetration distribution network quickly and stably,has a strong ability to withstand noise,and solves the influence of 5G time delay fluctuation on pilot protection.
pilot protectioncorrelation coefficienthigh permeability5G
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