抑制电网背景谐波的地铁双向变流器控制策略
周湘杰1,2刘晓桂1,2钱娜1,2李松林3张大川1,2
Control Strategy of Subway Bidirectional Converter for Suppressing Grid Background Harmonics
ZHOU Xiangjie1,2LIU Xiaogui1,2QIAN Na1,2LI Songlin3ZHANG Dachuan1,2
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作者信息:1.湖南省高铁运行安全保障工程技术研究中心， 412006， 株洲
2.湖南铁路科技职业技术学院铁道供电与电气学院，412006， 株洲
3.湖南创一机电工程技术有限公司， 412006， 株洲
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Affiliation:1.Hunan High Speed Railway Operation Safety Assurance Engineering Technology Research Center, 412006, Zhuzhou, China
2.College of Railway Power Supply and Electrical Engineering, Hunan Vocational College of Railway Technology, 412006, Zhuzhou, China
3.Hunan Chuang Yi Electromechanical Engineering Technology Co., Ltd., 412006, Zhuzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007－869x.20241404
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中图分类号/CLCN:U231.8
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栏目/Col:车辆制造与列车控制
摘要:
［目的］地铁牵引供电系统中的非线性电力设备在运行中会使电网电压产生畸变，造成电网背景谐波较大，从而给地铁双向变流器的并网电流质量带来影响。因此，有必要对抑制电网背景谐波的地铁双向变流器控制策略进行研究。［方法］为了有效抑制电网背景谐波，以电网中最常见的5、7、11和13次谐波抑制为研究目标，建立了α、β轴下的功率电流环和谐波电流环的统一传递函数；针对谐波抑制的PR（比例谐振）控制器相位裕度小而导致系统不稳定问题，采用零极点对消法将PR控制器改造为VR（矢量谐振），提高了系统的相位裕度；并提出了功率电流环的PI（比例积分）控制器参数和VR控制器参数的整定方法。［结果及结论］通过RTDS（实时数字仿真）试验平台验证了该控制策略和参数整定方法的正确性和有效性，达到了有效抑制电网背景谐波的目的。
Abstracts:
［Objective］ The nonlinear power equipment in subway traction power supply systems causes distortions in grid voltage during operation, leading to large grid background harmonics, which will affect the grid-connected current quality of subway bidirectional converter. Therefore, it is necessary to study the control strategy of subway bidirectional converter to suppress the grid background harmonics. ［Method］ To effectively suppress the grid background harmonics, the suppression of the most common 5th, 7th, 11th and 13th harmonics in the grid is taken as the research target, and the unified transfer functions of power current and harmonic current loops under the α and β axes are established; in view of the problem of system instability caused by the small phase margin of PR (proportional resonance) controller for harmonic suppression, a zero-pole cancellation method is used to transform the PR controller into VR (vector resonance), improving the system phase margin; and the tuning method of PI (proportional integral) controller and VR controller parameters for the power current loop is proposed. ［Result & Conclusion］ The correctness and effectiveness of the control strategy and parameter setting method are verified through the RTDS (real-time digital simulation) test platform, achieving the purpose of effectively suppressing the grid background harmonics.
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