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统一潮流控制器近端母线的短路电流计算方法
Short-circuit Current Calculation Method for Near-end Bus of Unified Power Flow Controller
- 电力系统自动化-方正平台 2020年44卷第15期 页码：95-102
- 作者机构：
1. 浙江大学电气工程学院,浙江省 杭州市 310027
2. 国网河北省电力有限公司经济技术研究院,河北省 石家庄市 050011
- 作者简介：
周宁（1996—），男，硕士研究生，主要研究方向：电力 系统稳定与控制。E-mail：ningzhou@zju.edu.cn
张章（1984—），男，硕士，高级工程师，主要研究方向： 电力系统稳定与控制。E-mail：zhzh019@163.com
梁涛（1994—），男，硕士研究生，主要研究方向：电力 系统负荷特性分析与建模。E-mail：liang_tao@zju.edu.cn
吴浩（1973—），男，通信作者，博士，副教授，主要研究 方向：电力系统负荷建模、稳定性分析、连锁故障、多项式逼近方法应用。E-mail：vuhao@zju.edu.cn。
- 基金信息：Abstract:
In view of the existing unified power flow controller (UPFC) in actual
DOI：10.7500/AEPS20200316007
中图分类号：收稿日期：2020-03-16，
修回日期：2020-04-22，
网络出版日期：2020-06-06，
纸质出版日期：2020-08-10
- 稿件说明：
移动端阅览
周宁,张章,梁涛等.统一潮流控制器近端母线的短路电流计算方法[J].电力系统自动化,2020,44(15):95-102.
ZHOU Ning,ZHANG Zhang,LIANG Tao,et al.Short-circuit Current Calculation Method for Near-end Bus of Unified Power Flow Controller[J].Automation of Electric Power Systems,2020,44(15):95-102.
周宁,张章,梁涛等.统一潮流控制器近端母线的短路电流计算方法[J].电力系统自动化,2020,44(15):95-102. DOI： 10.7500/AEPS20200316007.
ZHOU Ning,ZHANG Zhang,LIANG Tao,et al.Short-circuit Current Calculation Method for Near-end Bus of Unified Power Flow Controller[J].Automation of Electric Power Systems,2020,44(15):95-102. DOI： 10.7500/AEPS20200316007.
摘要
针对目前实际投运的统一潮流控制器（UPFC)及其采用的故障控制策略，基于电网络理论推导了UPFC近端母线短路电流的计算方法。使用UPFC串联线路对故障母线的转移导纳描述了UPFC的近端母线，由于UPFC串联侧在近端母线故障时立即被旁路保护，导致故障母线的戴维南等值电势发生突变，进而对短路电流的计算结果产生影响，计算结果的相对变化与UPFC故障前运行电压和电流分布系数有关。在IEEE 9节点系统中，研究了运行条件变化以及UPFC参数变化对短路电流的影响，并使用PSCAD对计算结果进行了仿真验证；在IEEE 118节点系统中，分析了UPFC对大规模电网短路电流的影响。结果表明，UPFC对其两侧母线短路电流的影响相反，且对近端母线短路电流的影响随着电气距离增大而减小。
Abstract
In view of the existing unified power flow controller (UPFC) in actual operation and its fault control strategy
a short-circuit current (SCC) calculation method for near-end bus of UPFC is derived based on the electric network theory. The near-end bus of UPFC is described by transfer admittance of UPFC series line to faulty bus. Since the series side of UPFC is immediately protected through bypass after the near-end bus fault
the Thevenin equivalent potential of the faulty bus changes suddenly
which affects the calculation result of SCC. The relative change of the calculation result is related to both the operation voltage of UPFC before the fault and the current distribution coefficient. The effects of operation condition change and UPFC parameter change on the SCC are studied in the IEEE 9-bus system and verified by PSCAD. The influence of UPFC on the SCC in large-scale power grid is analyzed in the IEEE 118-bus system. The results show that UPFC has the opposite effect on the SCC of bus on two sides
and the effect on the SCC of the near-end bus decreases with the increase of electrical distance.
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Keywords
references
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