计及新能源幅相特性的新型多馈入短路比指标  

A New Multi-infeed Short Circuit Ratio Index Taking Into Account the Amplitude and Phase Characteristics of New Energy

作　　者：黄启元 曹善康 吴宇奇 林湘宁[1] 魏繁荣[1] 杨丹 崔挺 HUANG Qiyuan;CAO Shankang;WU Yuqi;LIN Xiangning;WEI Fanrong;YANG Dan;CUI Ting(State Key Laboratory of Advanced Electromagnetic Engineering and Technology(Huazhong University of Science and Technology),Wuhan 430074,Hubei Province,China;Research Institute of Electric Power Science,State Grid Hunan Electric Power Company Limited,Changsha 410007,Hunan Province,China)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074 [2]国网湖南省电力有限公司电力科学研究院,湖南省长沙市410007

出　　处：《中国电机工程学报》2024年第15期5960-5972,I0010,共14页Proceedings of the CSEE

基　　金：国家自然科学基金企业创新发展联合基金项目(U22B20106);国网湖南省电力有限公司科技项目(5216A021002U)。

摘　　要：为了合理评估高比例新能源并网的多馈入高压直流输电(multi-infeed HVDC,MIDC)系统电压支撑能力,该文首先分析MIDC系统结构特点,随后基于多馈入短路比(multi-infeed short circuit ratio,MISCR)指标,并结合新能源短路电流幅值和相位随机端电压变化的特性(以下简称“幅相特性”),提出多馈入暂态短路比(multi-infeed transient short circuit ratio,MITSCR)指标;其次,根据国家标准的要求分析以双馈风机(doubly-fed induction generator,DFIG)为代表的新能源在不同控制模式下的幅相特性,并通过MITSCR指标分析DFIG接入对MIDC系统节点电压支撑能力影响;最后,利用PSACD/EMTDC软件进行时域仿真分析,结果表明,MITSCR指标能有效表征节点的电压支撑能力,验证了该指标的有效性与优越性。In order to properly evaluate the voltage support capability of the multi-infeed HVDC(MIDC)system with high proportion of new energy access,this paper first analyzes the structural characteristics of the MIDC system,and based on the multi-infeed short circuit ratio(MISCR)index and the characteristics of the amplitude and phase variation of the short-circuit current(hereinafter referred to as"amplitude and phase characteristics")caused by new energy,a new index called multi-infeed transient short circuit ratio(MITSCR)is proposed.Then,adhering to the requirements stipulated in the National Standard of the People's Republic of China,the amplitude and phase characteristics of new energy represented by doubly-fed induction generators(DFIG)under different control modes are analyzed,and the impact of DFIG access on the node's voltage support capability of the MIDC system is also analyzed through the MITSCR index.Finally,time-domain simulation analysis is carried out using the PSACD/EMTDC software,and the results show that the MITSCR index can effectively characterize the node's voltage support capability,verifying the effectiveness and superiority of the index.

关 键 词：多馈入直流输电 新能源 幅相特性 电压支撑能力 多馈入暂态短路比 

分 类 号：TM71[电气工程—电力系统及自动化]