摘要
电力系统中因电磁式电压互感器(potential transformer,PT)饱和引起的铁磁谐振故障频繁发生。为了准确表征电磁式PT本体参数对铁磁谐振的作用情况,亟需对PT各因素的影响程度进行量化分析。文中首先介绍了电磁式PT铁磁谐振的产生机理和主要影响因素,并对PT等效模型和参数进行分析;其次,在ATP⁃EMTP中构建铁磁谐振仿真模型,并借助真型试验验证模型的可行性;最后分别对各参数的作用情况进行仿真,并通过试验设计法(design of experiment,DOE)量化分析电磁式PT本体参数对铁磁谐振过电压的影响程度,确定关键影响因素。结果表明,在分频和基频谐振情况下,PT励磁特性和绕组漏感对谐振过电压的影响程度最大,而当系统发生高频谐振时,杂散电容占据主要影响作用。该分析结果将为预防和治理配电网铁磁谐振提供重要的参考依据。
The ferromagnetic resonance due to saturation of electromagnetic potential transformer(PT)occurs fre-quently in power systems.For accurately characterizing the effect of the parameters of electromagnetic PT on the fer-romagnetic resonance,it is urgent to quantitatively analyze the influence degree of each parameter of the PT.In this paper,the generation mechanism and main influencing factors of ferromagnetic resonance of the electromagnetic PT were introduced firstly,and the equivalent model and parameters of the PT were analyzed.Then,the ferromagnetic resonance simulation model was constructed in ATP-EMTP and the feasibility of the model was verified by full-scale test.Finally,the effects of each parameter were simulated respectivel,and the influece extent of electromagnetic PT noumenal parameters on ferromagnetic resonance overvoltage was quantitatively analyzed through the design of ex-periment(DOE)so to determine the key influencing factors.The result shows that the PT excitation characteristics and winding leakage inductance have the greatest influence on the resonance overvoltage in the case of frequency di-vision and fundamental frequency resonance.While,in the case of high frequency resonance in the system,the stray capacitance plays dominant role in exerting its influence.The analysis results will provide an important reference for the prevention and treatment of ferromagnetic resonance in distribution network.
作者
陈曦
陈丽安
CHEN Xi;CHEN Li’an(School of Electrical Engineering and Automation,Xiamen University of Technology,Fujian Xiamen 361024,China;Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control,Fujian Xiamen 361024,China)
出处
《高压电器》
北大核心
2025年第8期128-138,共11页
High Voltage Apparatus
基金
福建省自然科学基金(2023J011443)。
关键词
电磁式电压互感器
铁磁谐振
本体参数
影响因素
试验设计法
electromagnetic potential transformer
ferroresonance
noumenal parameters
influencing factor
design of experiment
