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High Voltage Engineering. 2014, (05) Core

Application of Static Var Compensator in Qinghai-Tibet HVDC ProjectChinese Full Text

ZHOU Jing;ZHOU Jin;YIN Weiyang;State Power Economic Research Institute;Southwest University for Nationalities;

Abstract: The weak ac system connection of Tibet Power Grid leads to small capacity and more installed number of reactive power compensation apparatus, which will cause increasing investment, thus we established a simulation model of Qinghai-Tibet ac and dc systems with static var compensator（SVC） by PSACD to calculate voltage fluctuation caused by switching reactive power compensation apparatus of different capacity under different operation modes and in different years, so as to figure out suitable reactive power compensation arrangement. Meanwhile, we determined the reactive power capacity of sub-bank for the near term and the future term by plenty of simulation. It is concluded that, the capacity of sub-bank increases from the original 25 MVA to 45 MVA and the temporary steady-state voltage fluctuation of commutation bus can meet the requirements of reactive power guide, indicating that the strategy improves stability and safety of the project. The actual operation situation proves validity and feasibility of the proposed strategy, which provides a reference for future HVDC project design.
Keywords：

weak AC system; HVDC transmission; short current ratio; SVC; reactive compensation; voltage fluctuation;

  • DOI：

    10.13336/j.1003-6520.hve.2014.05.036

  • Series：

  • Subject：

  • Classification Code：

    TM761.12

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