• GAO Yajing ¹

  GAO Yajing

  State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China
  在知网中查找
  在百度中查找
  在本站中查找
  
• MIAO Hongjia ^1,2,3

  MIAO Hongjia

  State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China
  在知网中查找
  在百度中查找
  在本站中查找
  
• WU Wenchuan ^2,3,1,4,2,3

  WU Wenchuan

  China;Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China
  在知网中查找
  在百度中查找
  在本站中查找
  
• LI Fei ⁴

  LI Fei

  Guizhou Power Grid Corporation, Guiyang 550002, China
  在知网中查找
  在百度中查找
  在本站中查找
  

(1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Baoding 071003, China; 2. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; 3. State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China; 4. Guizhou Power Grid Corporation, Guiyang 550002, China)

Convergence problems in forward/backward sweep power flow algorithms may arise because of neutral grounding resistance in multi-grounded three-phase four-wire distribution networks. The causes of the convergence problem are analyzed and an impedance compensation method of addressing this problem is described. The proposed method is able to guarantee the convergence and keep the power flow solution unchanged. By adding two serial impedances with opposite value between the grounding resistance and the neutral point, the spectral radius of the Jacobian matrix in fixed-point iteration is reduced to below 1, which satisfies the requirement of contraction mapping. Finally, the results of numerical tests have demonstrated the correctness of the method and its practical values. This work is supported by National Key Technologies R&D Program of China (No. 2013BAA01B01) and Important Guizhou Science & Technology Specific Projects (No. (2012)6022).

distribution networks; power flow calculation; forward/backward sweep algorithm; compensation impedances