牵引变电所电力信号特征及暂态电能质量评价方法

2019 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm) Pub Date : 2019-10-01 DOI:10.1109/SmartGridComm.2019.8909782

Wenli Chen, Kaitao Peng, C. Yang, Yao Wang, Zhihong Fu

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引用次数: 1

摘要

电力机车运行导致牵引变电所电力信号具有复杂的非线性动态特性，使得基于稳态信号处理技术的电能质量指标计算存在较大误差。因此，基于电力系统计算机辅助设计/包括直流在内的电磁暂态(PSCAD/EMTDC)，建立了普通电力机车变换器的仿真模型。分析了牵引变电所电力信号的特点，并与实测电力信号进行了比较。分析了动车组线路阻抗变化与电网信号波动之间的内在关系。最后，提出了几种暂态电能质量评价方法，并采用瞬时归一化失真能量指数(INDEI)来评价实测电能信号的暂态电能质量。该指标能准确识别信号跳变类型，有助于提高动态负载电能质量分析的可靠性。

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Traction substation power signal characteristics and transient power quality evaluation method

The electric locomotive operation leads to complex nonlinear dynamic characteristics of the power signal of the traction substation, which makes the calculation of the power quality index based on the steady state signal processing technology have large errors. Therefore, based on power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC), the simulation model of common electric locomotive converter is built. The characteristics of traction substation power signal are analyzed and compared with the measured power signal. The internal relationship between the line impedance change of traction electric multiple units (EMU) and grid signal fluctuation is analyzed. Finally, some transient power quality evaluation methods are proposed, and the instantaneous normalized distortion energy index (INDEI) is used to evaluate the transient power quality of the measured power signals. This index can accurately identify the signal jumping type and help to improve the reliability of dynamic load power quality analysis.

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来源期刊

2019 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids (SmartGridComm)

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