Abstract：With the economic development, adopting 20kV distribution network has more and more advantages compared with 10kV voltage distribution, such as improving the stability of power system, power quality and economy of operation, and reducing the investment of power grid. However, In the 20kV distribution network to build, boost, transformation, the neutral point grounding has become one of the key technical issues, the equipment selection, system operation and relay protection has a significant impact. In this paper, firstly, the advantages of using 20kV voltage level are compared with 10kV and 35kV. Then, analyzed and discussed the neutral point of 20kV distribution network is not grounded, grounding through peterson coil; grounding through small resistance; flexible grounding. Finally, the status quo and development trend of neutral point grounding of 20kV distribution network both at home and abroad are summarized, providing a technical reference for the widespread use of 20kV distribution network in the future.
尹文琴. 20kV配电网应用及中性点接地方式研究[J]. 电气技术, 2018, 19(10): 65-69.
Yin Wenqin. Application of 20kV distribution network and study on the selection of neutral point grounding modes. Electrical Engineering, 2018, 19(10): 65-69.
2018, Vol. 19 
