电力系统中压电网谐振关键元器件评估  

Key Resonance Component Evaluation of Medium-Voltage Power Systems

作　　者：周子康 陶顺 薛超凡 袁威 徐永海 ZHOU Zikang;TAO Shun;XUE Chaofan;YUAN Wei;XU Yonghai(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《中国电力》2024年第2期127-137,共11页Electric Power

基　　金：国家自然科学基金资助项目(52377101)。

摘　　要：模态分析法可以获得最丰富的谐振信息,现有灵敏度分析方法可以得到每种元器件对谐振影响程度的排序,但无法明确辨别谐振关键元件和谐振电路。首先,通过推导对各参与因子的物理意义进行了解释,归纳了现有的2种灵敏度分析方法;然后,考虑不同属性元器件取值范围的差异性及逆变器外特性的影响,提出了一种适用于配电网谐振关键元件和电路的识别方法;最后,通过算例分析和PSCAD仿真结果,验证了所得谐振关键元器件的准确性。该方法可以较为准确地识别出系统固有谐振的关键元器件,为研究谐波谐振问题及其抑制、事故调查分析等提供参考。Modal analysis techniques can capture the most comprehensive harmonic resonance data.Although current sensitivity analysis methodologies can rank the impact that each electronic component has on resonance,they fall short in precisely pinpointing the key resonant components and circuits.Initially,an explanation of the physical significance of the contributing factors is offered following the derivation,and two existing sensitivity analysis methods are summarized.Subsequently,taking into account the diversity in the value ranges of components with different attributes,as well as the effects of the external characteristics of inverters,a novel identification method is introduced.This method is tailored for pinpointing critical resonant elements and circuits within power distribution networks.The method's precision in identifying vital resonant components is corroborated through analytical examples and PSCAD simulation outcomes.This technique provides an accurate means to discern the critical components that drive systemic inherent resonance,serving as a valuable resource for the study and mitigation of harmonic resonance issues,as well as for post-incident analyses.

关 键 词：模态分析法 灵敏度分析 谐波谐振 谐振关键元件 谐振关键电路 

分 类 号：TM73[电气工程—电力系统及自动化]