Abstract：High-speed train adopts four quadrant converters (4QC) as the energy conversion unit, and its mismatch in frequency-domain impedance characteristic with traction power supply network will lead to low-frequency oscillation, harmonic amplification, and other phenomena, which will affect the safe and stable operation of the electric railway. Impedance measurement technology can effectively obtain the impedance characteristics of the actual engineering system, which has a wide application prospect. Existing studies have shown that the frequency couplings caused by the asymmetric 4QC controller will interfere with the accuracy of the impedance measurement results under the wideband-based method. To avoid this interference, the frequency-sweeping-based method can be selected. However, this paper indicates that the frequency couplings will also deteriorate the accuracy of the measurement results when the frequency-sweeping-based method is used for 4QC dq impedance measurement, and the interference mechanism is analyzed in detail. Accordingly, a convenient and effective suppression strategy is proposed. Finally, the detailed impedance measurement models of 4QC are built in Matlab/Simulink and hardware- in-the-loop test platform. The results verify the correctness and effectiveness of the presented interference mechanism and suppression strategy.
潘鹏宇, 胡海涛, 肖冬华, 宋依桐, 何正友. 高速列车变流器“扫频式”dq阻抗测量中的频率耦合干扰机理及抑制策略[J]. 电工技术学报, 2022, 37(4): 990-999.
Pan Pengyu, Hu Haitao, Xiao Donghua, Song Yitong, He Zhengyou. Frequency Coupling Interference Mechanism and Suppression Strategy for Frequency-Sweeping-Based dq Impedance Measurement of High-Speed Train Converter. Transactions of China Electrotechnical Society, 2022, 37(4): 990-999.
[1] 袁佳歆, 曲锴, 郑先锋, 等. 高速铁路混合储能系统容量优化研究[J]. 电工技术学报, 2021, 36(19): 4161-4169. Yuan Jiaxin, Qu Kai, Zheng Xianfeng, et al.Optimizing research on hybrid energy storage system of high speed railway[J]. Transactions of China Electrotechnical Society, 2021, 36(19): 4161-4169. [2] 肖非然, 倪周, 闵永智, 等. 一种基于多智能体的多站协同高速铁路不平衡补偿方法[J]. 电工技术学报, 2020, 35(16): 3518-3528. Xiao Feiran, Ni Zhou, Min Yongzhi, et al.Unbalanced compensation method of multi-station cooperative for high-speed railway based on multi-agent[J]. Transa- ctions of China Electrotechnical Society, 2020, 35(16): 3518-3528. [3] 母秀清, 王英, 陈思彤, 等. 基于改进sum-范数判据的高速铁路车网电气耦合系统稳定性研究[J]. 电工技术学报, 2019, 34(15): 3253-3264. Mu Xiuqing, Wang Ying, Chen Sitong, et al.Stability research on high-speed railway vehicle network electric coupling system based on improved sum- norm criterion[J]. Transactions of China Electro- technical Society, 2019, 34(15): 3253-3264. [4] 魏文婧, 胡海涛, 王科, 等. 基于铁路功率调节器的高速铁路牵引供电系统储能方案及控制策略[J]. 电工技术学报, 2019, 34(6): 1290-1299. Wei Wenjing, Hu Haitao, Wang Ke, et al.Energy storage scheme and control strategies of high-speed railway based on railway power conditioner[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1290-1299. [5] 魏波, 胡海涛, 王科, 等. 基于实测数据和行车运行图的高铁牵引变电站负荷预测方法[J]. 电工技术学报, 2020, 35(1): 179-188. Wei Bo, Hu Haitao, Wang Ke, et al.Research on taction load forecasting method for high-speed railway traction substation based on measured data and train timetable[J]. Transactions of China Electro- technical Society, 2020, 35(1): 179-188. [6] Shuai Zhikang, Cheng Huijie, Xu Jiazhu, et al.A notch filter-based active damping control method for low-frequency oscillation suppression in train- network interaction systems[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2019, 7(4): 2417-2427. [7] 陶海东, 胡海涛, 朱晓娟, 等. 车网耦合下的牵引供电系统谐振不稳定机理分析[J]. 中国电机工程学报, 2019, 39(8): 2315-2324. Tao Haidong, Hu Haitao, Zhu Xiaojuan, et al.Mechanism on resonance instability of traction power supply system considering interaction between trains and networks[J]. Proceedings of the CSEE, 2019, 39(8): 2315-2324. [8] 陶海东, 胡海涛, 姜晓锋, 等. 牵引供电低频网压振荡影响规律研究[J]. 电网技术, 2016, 40(6): 1830-1838. Tao Haidong, Hu Haitao, Jiang Xiaofeng, et al.Research on low frequency voltage oscillation in traction power supply system and its affecting factors[J]. Power System Technology, 2016, 40(6): 1830-1838. [9] Hu Haitao, Zhou Yi, Li Xin, et al.Low-frequency oscillation in electric railway depot: a comprehensive review[J]. IEEE Transactions on Power Electronics, 2021, 36(1): 295-314. [10] Zhou Yi, Hu Haitao, Yang Jie, et al.A novel forbidden-region-based stability criterion in modified sequence-domain for AC grid-converter system[J]. IEEE Transactions on Power Electronics, 2019, 34(4): 2988-2995. [11] Hu Haitao, Tao Haidong, Wang Xiongfei, et al.Train-network interactions and stability evaluation in high-speed railways-part II: influential factors and verifications[J]. IEEE Transactions on Power Elec- tronics, 2018, 33(6): 4643-4659. [12] Wang Hui, Wu Mingli, Sun Juanjuan.Analysis of low-frequency oscillation in electric railways based on small-signal modeling of vehicle-grid system in dq frame[J]. IEEE Transactions on Power Electronics, 2015, 30(9): 5318-5330. [13] Liao Yicheng, Liu Zhigang, Zhang Han, et al.Low- frequency stability analysis of single-phase system with dq-frame impedance approach-part I: impedance modeling and verification[J]. IEEE Transactions on Industry Applications, 2018, 54(5): 4999-5011. [14] Liao Yicheng, Liu Zhigang, Zhang Han, et al.Low- frequency stability analysis of single-phase system with dq-frame impedance approach-part II: stability and frequency analysis[J]. IEEE Transactions on Industry Applications, 2018, 54(5): 5012-5024. [15] Zhou Yi, Hu Haitao, Yang Xiaowei, et al.Low frequency oscillation traceability and suppression in railway electrification systems[J]. IEEE Transactions on Industry Applications, 2019, 55(6): 7699-7711. [16] Pan Pengyu, Hu Haitao, Yang Xiaowei, et al.Impedance measurement of traction network and electric train for stability analysis in high-speed railways[J]. IEEE Transactions on Power Electronics, 2018, 33(12): 10086-10100. [17] Hu Haitao, Pan Pengyu, Song Yitong, et al.A novel controlled frequency band impedance measurement approach for single-phase railway traction power system[J]. IEEE Transactions on Industrial Electro- nics, 2020, 67(1): 244-253. [18] Pan Pengyu, Hu Haitao, Xiao Donghua, et al.An improved controlled-frequency-band impedance mea- surement scheme for railway traction power system[J]. IEEE Transactions on Industrial Electronics, 2021, 68(3): 2184-2195. [19] Gong Hong, Yang Dongsheng, Wang Xiongfei.Impact of nonlinear dynamics on converter dq impedance measurement[C]//IEEE Workshop on Control and Modeling for Power Electronics (COMPEL), Toronto, Canada, 2019: 1-6. [20] Liao Yicheng, Liu Zhigang, Hu Xinxuan, et al.A dq-frame impedance measurement method based on Hilbert transform for single-phase vehicle-grid system[C]//IEEE Transportation Electrification Con- ference and Expo, Asia-Pacific (ITEC Asia-Pacific), Harbin, China, 2017: 1-6. [21] 肖冬华, 胡海涛, 潘鹏宇, 等. 高速列车dq阻抗测量方法及其装置设计[J]. 中国电机工程学报, 2020, 40(22): 7230-7240. Xiao Donghua, Hu Haitao, Pan Pengyu, et al.dq impedance measurement method and its device design of high-speed train[J]. Proceedings of the CSEE, 2020, 40(22): 7230-7240. [22] 周毅, 胡海涛, 雷科, 等. 电气化铁路低频等幅振荡机理分析[J]. 中国电机工程学报, 2021, 41(9): 3024-3036. Zhou Yi, Hu Haitao, Lei Ke, et al.Mechanism analysis of the sustained low-frequency oscillation in the electric railway system[J]. Proceedings of the CSEE, 2021, 41(9): 3024-3036.
2022, Vol. 37 
