基于换流母线视角的交直流系统交互无功功率动态特性分析  

Analysis of dynamic characteristics for reactive power feeding into AC/DC system based on the converter bus perspective

作　　者：苏海林[1] 朱林[1] 高琴[1] 杨欢欢[1] 蔡泽祥[1] 陈达[1] 

机构地区：[1]华南理工大学电力学院,广东广州510641

出　　处：《电力科学与技术学报》2017年第2期126-133,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51407079)

摘　　要：多馈入交直流电网受扰后,其严峻的无功环境给电网安全运行带来潜在威胁。首先,基于功率视角,分析准稳态运行下交直流系统交互无功功率的组成,系统全面地揭示了其复杂的动态特性;然后,基于换流母线视角,深入探讨影响该动态特性的因素;最后,通过PSCAD平台搭建等值系统模型,仿真分析在受端系统强度、综合负荷特性、故障类型及其位置等因素影响下,交直流系统交互无功功率的动态响应特性。该研究成果对于全面把握交直流互联电网的动态特性具有重要参考价值。After the multi-infeed AC/DC system disturbed, the severe reactive environment will threaten the operation of power grid potentially. Thus, based on quasi-steady state, this paper analyzed the components of reactive power feeding into AC/DC system. Then, the dynamic characteristics as well as influence factors were revealed from the converter bus perspective. Finally, according to a equivalent system model in PSCAD/EMTDC, this paper analyzed dynamic characteristics of reactive power with the effects of four factors, including the strength of receiving-end power system, the synthetic load characteristics, the fault type and its location. The simulation results verify the theory presented in the paper which could be an important guidance to comprehend the dynamic process of AC/DC hybrid power system.

关 键 词：换流母线视角 无功动态特性 短路比 综合负荷 故障类型及其位置 

分 类 号：TM721[电气工程—电力系统及自动化]