LOW VOLTAGE APPARATUS ›› 2022, Vol. 0 ›› Issue (11): 81-86.doi: 10.16628/j.cnki.2095-8188.2022.11.014

• Application • Previous Articles    

Treatment of Power Grid Voltage Imbalance Along Geku Railway

WANG Lichao1,2, YU Yongjun1,2, QI Xiaoxiao1,2, LI Decun1,2, XIAO Shiwu3, LI Xiaopei1, MA hong1   

  1. 1. State Grid Xinjiang Electric Power Co.,Ltd.Research Institute, Urumqi 830011, China
    2. Xinjiang Key laboratory of Whole Process Simulation for Power System, Urumqi 830011, China
    3. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China
  • Received:2022-03-04 Online:2022-11-30 Published:2023-01-04

Abstract:

After the operation of Geku Railway was opened to traffic,due to its nonlinear and asymmetric impact load nature,the three-phase voltage of the power grid along the line is seriously unbalanced,and the nearby enterprises can not operate normally.Based on the fluctuation characteristics of unbalanced power,the calculation method of equivalent compensation at low voltage triangular side of transformer is derived,and its feasibility is verified by the single machine infinite bus model.For the first time,the scheme of centralized treatment of the negative sequence unbalanced power of multiple lines and different voltage levels in the substation is adopted to build the PSCAD simulation model of power grid along Geku Railway,and the treatment suggestions are given in combination with the actual operating conditions and power grid characteristics of Geku Railway,which can guide the practical engineering.

Key words: asymmetric load, negative sequence current, voltage imbalance, centralized compensation, decentralized compensation

CLC Number: