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基于ETAP的沪宁城际铁路谐波分析
郑爱霞1, 袁晓冬2, 李 群2
1.江苏省电力公司,江苏 南京 210024;2.江苏省电力试验研究院,江苏 南京 210036
摘要:
针对高速电气化铁路的特点,简要介绍了其产生的谐波对电网的影响。以V/v型牵引变压器的接线原理为基础,推导了电气化铁路接入系统的等值方法。将谐波电流从低压侧的两相转换到高压侧的三相,建立谐波负荷模型。在ETAP软件中进行仿真分析,研究沪宁城际铁路对江苏电网的影响,包括公共连接点的谐波电流和谐波电压。通过与实测值的比较,验证了所采用的电气化铁路建模和仿真方法的正确性。对江苏电网部分容易引起谐振的站点进行了频率扫描,并提出了一些谐波补偿和抑制的有益建议。
关键词:  电气化铁路  牵引  变压器  谐波分析  频率扫描  ETAP
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Harmonic analysis based on ETAP for Shanghai-Nanjing Intercity Railroad
ZHENG Aixia1, YUAN Xiaodong2, LI Qun2
1.Jiangsu Province Electric Power Company,Nanjing 210024,China;2.Jiangsu Province Electric Power Test and Research Institute,Nanjing 210036,China
Abstract:
The influence of harmonics produced by high-speed electric railroads on grid is introduced. Based on the wiring principle of V/v type traction transformer,the equivalent method of electric railroads connecting to grid is derived. Harmonic load model is established by transforming the harmonic currents from two-phase at LV side to three-phase at HV side. The influence of harmonics produced by Shanghai-Nanjing Intercity Railroad on Jiangsu Power Grid is studied with ETAP,including the harmonic current and voltage of PCC. The comparison with the measured values verifies the validity of the proposed method for the modeling and simulation of electric railroads. Frequency scan is carried out for some sites of Jiangsu Power Grid,which are easy to be resonated. Suggestions are put forward for harmonic compensation and suppression.
Key words:  electric railroads  electric traction  electric transformers  harmonic analysis  frequency scan  ETAP

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