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特高压直流输电换流变系统运行特点及备用最优切换研究

East China Electric Power(2011)

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Abstract
超高压直流输电系统中,换流变系统是影响直流输电系统能量可用率和可靠性的重要因素。详细阐述了特高压直流输电换流变系统的元件组停运模型、换流站单侧整体备用模式及换流变压器的两种故障模式等运行特点;研究了换流变系统备用最优切换模型,给出了停运换流单元备用启用最优组合的求解方法,算例结果表明按照备用启用最优组合对停运换流单元启用备用,系统缺供电量最少,为换流站运行人员提供了有益的参考。
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Key words
optimal spare switching,failure mode,spare mode,optimal combination for enabling spare CTs,converter transformer system,UHVDC transmission system
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