Study On The Influence Of Neutral Grounding Mode On Power Supply Reliability Of Distribution Network

With the large-scale development of power grid enterprises,the drawbacks of the traditional arc suppression coil grounding mode are gradually revealed ? It is urgent to improve the existing neutral grounding mode through the linkage of the main distribution network ? At present,improving the reliability of distribution network is an important measure,The high quality development of power grid enterprises to achieve stable and safe operation of power grid,Orderly and reliable power supply? At present,with the continuous improvement of distribution network structure and the increasing reliability of distribution network equipment,The use of more suitable neutral grounding mode in urban or mountainous areas,Can significantly improve the reliability of power supply?How to use operation to collect basic data,establish database,and systematically analyze multi-elements and reliability indexes such as zero-sequence tripping,self-healing and protection action,so as to improve the fault quick removal of single-phase grounding fault and maximize the fault self-healing of distribution network,Establish a better neutral grounding operation system of distribution network,So to change the unchanged grounding mode is the current distribution network,The problems that need to be solved urgently?This paper mainly combines the current grid structure and the operation status of the small current grounding mode,aiming at the transformation mode of the neutral point grounding mode of the mountain power grid in recent years,from the analysis of the operation principle of the three 10 kV grounding modes of arc suppression coil grounding,arc suppression coil grounding with small resistance and small resistance,the advantages and disadvantages of different grounding modes are analyzed?According to the management requirement and calculation method ofreliability,the main reasons of the influence of current grounding mode on power supply reliability are identified,and the evaluation model of the influence of grounding mode on power supply reliability in mountainous area is established?Through three grounding modes of arc suppression coil grounding,arc suppression coil grounding with small resistance and small resistance,and taking the influence reliability factor analysis of overhead line distribution network and cable line distribution network conditions,the data before and after the transformation of actual operation stations with different connection modes of two years as a cycle are compared,and the detailed analysis is made that the power supply area is urban area,mountain area and transmission line are cable and overhead line ? The difference between the main power supply system and the transformation scheme of neutral grounding mode of distribution network in different power supply areas are formulated ? This paper probes into the development trend of distribution network automation,the coordinated application of different grounding modes and distribution network automation,how to quickly isolate single-phase grounding faults and how to quickly self-heal the distribution network,and puts forward an improvement scheme suitable for the influence of the neutral grounding mode on the reliability of the Heyuan power grid,so as to effectively improve the reliability of the regional power grid,ensure the safety of the power grid and the orderly supply of power?...