Research And Analysis On Reliability Of Regional Distribution Network Automation

Distribution automation can realize fault location,fault isolation and automatic transfer of distribution lines,which plays an important role in improving the reliability of distribution power supply.However,in recent years,the development of distribution automation often ignores the reliability of distribution automation.Distribution automation often acts incorrectly and fails to achieve the expected results.The existing research on the reliability of distribution network automation often does not go deep into the action principle of various feeder automation,and oversimplifies the failure mode and consequences of feeder automation,which can not reflect the actual production situation.This paper takes Zhongshan distribution automation as the research object,according to the current technical specifications of Zhongshan distribution automation,analyzes the action logic of distribution automation,establishes the reliability model of automation equipment such as voltage feeder automation,and analyzes its failure mode and failure consequences.The reliability index of distribution network considering feeder automation is used as the quantitative index to evaluate the reliability of distribution network automation,and the reliability algorithm of distribution network automation is designed.The simulation method is adopted to take into account the multiple failures of automatic equipment components for sampling,analyze the action of automatic switches,calculate the outage time in non fault areas,and iterate repeatedly to convergence.Finally,the reliability of distribution network automation is evaluated by the reliability index of distribution network power supply.According to the analysis of the reliability of distribution automation,this paper puts forward an optimization scheme to improve the reliability of Zhongshan distribution automation,and verifies the optimization effect by calculating the reliability of the optimized distribution automation system through the distribution automation reliability algorithm.This paper mainly puts forward the following optimization suggestions:(1)The reliability of voltage feeder automation is improved through the coordination of overcurrent protection reclosing function and voltage feeder automation.(2)Optimize the self-healing action logic of Zhongshan centralized master station,improve the success rate of power transfer,and reduce the risk of tripping of the opposite line caused by the failure of power transfer.(3)Optimize the action logic when the intelligent distributed communication is interrupted to ensure the input of intelligent distributed functions as much as possible.(4)Main station automation professional patrol inspection.Considering the large number and wide distribution of distribution network equipment and the shortage of automation operation and maintenance personnel,the master station is used to remotely monitor the failure of the automation terminal in real time,and timely arrange defect elimination,so as to improve the availability of automation equipment.