journal1 ›› 2015, Vol. 48 ›› Issue (1): 115-120.DOI: 10.11930/j.issn.10.11930.2015.1.115

• Power System • Previous Articles     Next Articles

Improvement Measures and Economy Analysis on 10 kV Direct Power Supply Load from 220 kV Substations

ZHANG Qiaoxia1, CHANG Gang2, XIAO Zheng1, CAO Xiaoqing1   

  1. 1. Wuhan Electric Power Design Institute, Wuhan 430032, China;
    2. State Grid Wuhan Power Supply Company, Wuhan 430014, China
  • Received:2014-09-10 Online:2015-11-24 Published:2015-11-25

Abstract: In order to coordinate the locations of 220 kV and 110 kV substations, a statistic analysis is made of the 220 kV substations based on the direct power supply situation from the 10 kV side of the 220 kV three-volume transformers in a province. The existing problems of direct power supply are studied and corresponding solutions are proposed from both technical and economic aspects. The solutions include: combining the distribution network planning with the 10 kV direct supply loads, optimizing the structure of the distribution system, reasonably utilizing the capacity of 220 kV substations, direct supplying power to the nearby 10 kV load system from the 220 kV substations, and controlling the delivery distance to ensure the system reliability. The above-said solutions can exploit the potential of the existing power network, decrease the line power loss, and make the distribution of the power grid more reasonable.

Key words: power system, distribution network planning, 220 kV substation, 10 kV low voltage side, direct supply load, power quality, techno-economic analysis, technical improvement measures

CLC Number: