直流多馈入电网生存性评估方法

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英文篇名：Survivability evaluation method of multi-infeed DC system considering DC control characteristics 作者：黄景慧 ; 郭紫昱 ; 李甜甜 ; 林涛 ; 刘永民 ; 司瑞华 ; 杨明臻 ; 张彦琪 英文作者：HUANG Jing-hui;GUO Zi-yu;LI Tian-tian;LIN Tao;LIU Yong-min;SI Rui-hua;YANG Ming-zhen;ZHANG Yan-qi;Henan Economic and Technological Research Institute,State Grid;School of Electrical Engineering,Wuhan University; 关键词：多馈入直流 ; 状态生存性 ; 临界阻抗 ; 低压限电流 ; 交直流连续潮流 英文关键词：multi-infeed direct current(MIDC);;state survivability;;critical impedance;;voltage-dependent current limit(VDCOL);;AC/DC continuous power flow 中文刊名：CSDL 英文刊名：Journal of Electric Power Science and Technology 机构：国家电网河南经济技术研究院;武汉大学电气工程学院; 出版日期：2017-12-28 出版单位：电力科学与技术学报 年：2017 期：v.32;No.119 基金：国家重点研发计划(“863计划”)(2017YFB0902600) 语种：中文; 页：CSDL201704002 页数：7 CN：04 ISSN：43-1475/TM 分类号：12-18

摘要

换流站作为大容量无功负荷,对直流落点地区电网电压支撑能力带来了压力,需要对换流母线在低电压下的生存性进行评估。以直流系统的额定传输功率、换流母线额定电压与系统可以容忍的最小三相接地阻抗(临界阻抗)来衡量多馈入直流系统状态生存性指标。在评估多馈入系统换流母线状态生存性时,设计考虑低压限电流的交直流连续潮流算法。运用PSCAD/EMTDC仿真软件构建基于benchmark模型的双馈入直流系统模型,验证了该文方法的可行性。
        As a large capacity reactive load,the converter station brings some problems to the voltage support capability of the multi DC terminal location.The survivability of the commutation buses at low voltage needs to be evaluated.The state survivability index(SSI) of the multi-infeed direct current(MIDC) system was measured by the rated transmission power of DC system,the rated voltage of commutated bus and the minimum three-phase grounding impedance(critical impedance).In assessing the survivability of the converter bus in multi-infeed systems,an AC/DC continuous power flow algorithm considering the voltage-dependent current limit(VDCOL) was designed.Finally,a double-fed DC system based on benchmark model was built by using PSCAD/EMTDC,results verified the feasibility of the proposed method.

引文

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