| 特高压直流完全闭锁后的暂态压升计算方法 |
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| 引用本文： | 辛超山,尹纯亚,李凤婷,刘新刚.特高压直流完全闭锁后的暂态压升计算方法[J].电力电容器与无功补偿,2020(1):184-190. |
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| 作者姓名： | 辛超山 尹纯亚 李凤婷 刘新刚 |
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| 作者单位： | ;1.国网新疆电力有限公司经济技术研究院;2.新疆大学电气工程学院;3.中国能源建设集团新疆电力设计院 |
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| 基金项目： | 国家自然科学基金项目(51877185);国家电网科技项目(SGXJJY00GHJS1800065)。 |
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| 摘 要： | 针对特高压直流完全闭锁引起的交流系统暂态过电压问题,得出无功盈余量、短路容量是引起暂态压升的主要因素,计及无功补偿的容升效应与交直流系统间的无功交换,得出无功盈余量的计算公式并推导出换流母线暂态压升的计算方法。根据暂态压升表达式提出两个新指标用来衡量直流完全闭锁后的暂态过电压程度,并定量分析了闭锁容量与暂态压升的关系。最后基于DIgSILENT仿真平台,分别搭建CIGRE直流输电标准测试系统与新疆天中直流送端系统,仿真验证了暂态压升计算方法的有效性与正确性。
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| 关 键 词： | 特高压直流 直流闭锁 暂态过电压 无功功率 短路容量 |
Calculation Method of Transient Voltage Rise after UHVDC Complete Blocking |
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| XIN Chaoshan,YIN Chunya,LI Fengting,LIU Xingang.Calculation Method of Transient Voltage Rise after UHVDC Complete Blocking[J].Power Capacitor $ Reactive Power Compensation,2020(1):184-190. |
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| Authors: | XIN Chaoshan YIN Chunya LI Fengting LIU Xingang |
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| Affiliation: | (Economic Research Institute,State Grid Xinjiang Electric power Co.,Ltd.,Urumqi 830011,China;School of Electrical Engineering,Xinjiang University,Urumqi 830047,China;Xinjiang Electric Power Institute Co.,Ltd.,China Engineering Group,Urumqi 830001,China) |
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| Abstract: | In view of transient overvoltage problem of alternating current(AC)system due to complete blocking of after ultra?high voltage direct current(UHVDC)system,it is concluded that surplus reactive power and short circuit capacity are the main factors that cause transient voltage rise.Considering reactive power compensation capacity gain effect and reactive power exchange between AC and DC systems,the calculation formula of reactive power allowance is obtained and the calculation method of transient bus rise is derived.According to the calculation method of transient voltage,two new indexes are proposed to measure the degree of transient overvoltage after the complete blocking of DC,and the relationship between the blocking capacity and the transient voltage rise is quantitative analyzed.Finally,the CIGRE DC transmission standard test system and Xinjiang Tianzhong DC transmission system are setup respectively on the basis of DIgSILENT simulation platform so to verify the validity and correctness of the calculation method of transient voltage rise. |
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| Keywords: | UHVDC DCblocking transientovervoltage reactivepower shortcircuitcapacity |
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