考虑电气化铁路影响的西藏电网谐振研究  

Resonance Research of Tibet Power Network Considering the Influence of Electrified Railway

作　　者：曾毅 孙晓佳 潘玲 潘爱强[2] 张鹏[2] ZENG Yi1 , SUN Xiaojia1 , PAN Ling2 , PAN Aiqiang2 , ZHANG Peng2(1. State grid Tibet Electric Power Research Institute,Lhasa 850000, China; 2. East China Electric Power Test Research Institute Co. ,Ltd. ,Shanghai 200437, China)

机构地区：[1]国网西藏电力有限公司电力科学研究院,拉萨850000 [2]华东电力试验研究院有限公司,上海200437

出　　处：《电力与能源》2018年第5期593-598,共6页Power & Energy

摘　　要：谐波污染是电气化铁路给电网带来的主要电能质量问题之一。电力机车在不同牵引站间运行会改变电网阻抗特性,可能引发谐波放大与谐振。以西藏电网为例,采用模态分析法研究谐振问题。首先建立电网的节点导纳矩阵,并对其进行特征值分解;其次采用参与因子分析各母线对谐振的观测性与激励性;采用模态灵敏度分析电网中各元件对谐振的影响程度,论证了谐振与各站之间的线路长度密切相关,并进一步分析了不同线路长度下的谐振情况。以西藏电网中康莎索引站为例,对该站及其周边电网进行谐振研究,并验证了分析的正确性。通过所提方法,对含电气化铁路的电网规划具有指导意义,同时也能缓减、治理谐波谐振问题。Harmonic pollution is one of the main power quality problems caused by electrified railway to the power grid. Operation of the electric locomotives among different traction stations will change the impedance characteristics of the electric network and may further causes harmonic amplification and resonance. Thus, based on the modal analysis method, Tibet power grid is set as an example to study the resonance problem. Firstly, the node admittance matrix is established and eigenvalue decomposition is applied. Then, participation factors are used to analyze the excitability and the observability of the critical mode for each bus. Eigenvalue sensitivity is used to analyze the influence of each component in the power grid on the resonance. It is demon- strated that the resonance is closely related to the length of the lines between stations. By changing the length of the transmission line, the resonance under different conditions is further analyzed. Taking Kang Sa Station in the Tibet Power Grid as an example, the resonance of this station and its surrounding power grid is studied, and the correctness of the analysis is verified. The proposed method is of guiding significance to power grid planning with electrified railways, and can also mitigate harmonic resonance problems.

关 键 词：电气化铁路 西藏电网 谐振 模态分析法 参与因子 灵敏度 

分 类 号：TM933[电气工程—电力电子与电力传动]