Journal of Modern Power Systems and Clean Energy

ISSN 2196-5625 CN 32-1884/TK

Coordinated optimization for controlling short circuit current and multi-infeed DC interaction
Author:
Affiliation:

1. State Grid Shandong Electric Power Research Institute, Jinan, 250002, China 2. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, 250061, China

Fund Project:

State Grid Corpo-ration of China, Major Projects on Planning and Operation Control of Large Scale Grid under Grant SGCC-MPLG020-2012.

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    Abstract:

    Due to increased penetration of renewable energies, DC links and other emerging technologies, power system operation and planning have to cope with various uncertainties and risks. In order to solve the problems of exceeding short circuit current and multi-infeed DC inter-action, a coordinated optimization method is presented in this paper. Firstly, a branch selection strategy is proposedby analyzing the sensitivity relationship between current limiting measures and the impedance matrix. Secondly, theimpact of network structure changes on the multi-infeed DC system is derived. Then the coordinated optimization model is established, which considers the cost and effect ofcurrent limiting measures, the tightness of network structure and the voltage support capability of AC system to multiple DCs. Finally, the non-dominated sorting geneticalgorithm II combining with the branch selection strategy,is used to find the Pareto optimal schemes. Case studies ona planning power system demonstrated the feasibility and speediness of this method.

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History
  • Received:
  • Revised:
  • Adopted:
  • Online: May 22,2015
  • Published: