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南京理工大学能源与动力工程学院,江苏省南京市 210094
孙超(1995—),男,硕士,主要研究方向:功率变流器开路故障诊断、容错控制。E-mail:sunchao190325@163.com
邱颖宁(1977—),女,通信作者,博士,副教授,主要研究方向:风力发电机故障诊断与可靠性。E-mail:yingning.qiu@njust.edu.cn
冯延晖(1977—),男,博士,副教授,主要研究方向:新能源发电及装备技术、电力电子变流器故障诊断与容错技术。E-mail:yanhui.feng@njust.edu.cn
收稿:2021-05-18,
修回:2021-09-14,
网络出版:2021-12-16,
纸质出版:2022-03-10
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孙超,邱颖宁,冯延晖等.基于空间矢量相位偏移的三相变流器容错优化控制[J].电力系统自动化,2022,46(5):96-104.
SUN Chao,QIU Yingning,FENG Yanhui,et al.Fault-tolerant Optimal Control of Three-phase Converter Based on Space Vector Phase Offset[J].Automation of Electric Power Systems,2022,46(5):96-104.
孙超,邱颖宁,冯延晖等.基于空间矢量相位偏移的三相变流器容错优化控制[J].电力系统自动化,2022,46(5):96-104. DOI: 10.7500/AEPS20210518006.
SUN Chao,QIU Yingning,FENG Yanhui,et al.Fault-tolerant Optimal Control of Three-phase Converter Based on Space Vector Phase Offset[J].Automation of Electric Power Systems,2022,46(5):96-104. DOI: 10.7500/AEPS20210518006.
三相变流器开路故障会导致风电系统停机,造成巨大的经济损失,因此对三相变流器容错运行能力的研究十分必要。以风力发电系统中三相AC/DC变流器为研究对象,建立了参考电压空间矢量和电流矢量相位差的数学模型,分析了两者之间相位差在开路故障后增大的原因。在此基础上,提出了基于空间矢量相位偏移的三相变流器容错优化控制方法,并通过仿真和实验验证了其可行性和有效性。结果表明,所提出的容错优化控制方法能够使参考电压空间矢量和电流矢量之间的相位差接近于0,提升三相变流器容错运行能力,降低系统容错控制时三相电流总谐波畸变率。
The open-circuit fault of three-phase converter will lead to shutdown of wind power systems
resulting in huge economic losses. Therefore
it is necessary to study the fault-tolerant operation ability of three-phase converters. This paper takes three-phase AC/DC converters in wind power systems as the research object
establishes the mathematical model of phase difference between reference voltage space vectors and current vectors
and analyzes the reasons for the increase of phase difference after open circuit faults. A fault-tolerant optimization control method of three-phase converters based on space vector phase offset is proposed
and its feasibility and effectiveness are verified by simulation and experiment. The results show that the proposed fault-tolerant optimization control method can narrow the phase difference between the reference voltage space vector and the current vector close to zero
improve the fault-tolerant operation capability of the three-phase converter
and reduce the total harmonic distortion (THD) of the three-phase current during fault-tolerant control.
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