基于LCL的风电并网逆变器无传感器控制

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摘要基于LCL滤波器的风电并网逆变器（LCL-GCI）需要增加传感器去检测电容电压或者电容电流来抑制LCL滤波器存在的固有谐振问题, 提高了系统的控制成本, 降低了系统的运行可靠性。鉴于此, 在分析虚拟磁链观测思想和LCL-GCI数学模型的基础上, 提出了LCL-GCI的无电网和无电容电压传感器控制技术, 只检测变换器侧电流和直流母线电压, 通过状态重构的方法设计电网电压观测器和LCL电容电压和电流观测器。利用观测器输出的电容电流进行前馈控制, 从而实现了LCL-GCI的有源阻尼控制。采用低通滤波器来代替纯积分器来设计观测器, 使得系统具有较强的抗干扰、抗负载扰动能力。实验结果表明, LCL-GCI的无传感器控制技术能够减少传感器数量, 降低系统的控制成本, 具有一定的应用价值。

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	王晗
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关键词 ： LCL滤波器, 风电并网逆变器, 无电压传感器控制, 虚拟磁链观测

Abstract：For the resonance problem of LCL filter, it is needed to increase the number of sensors to detect capacitor voltage or the capacitor current signals, which enhances the control costs and reduces the reliability of the system. In view of this, the core ideal of the virtual flux observing and the mathematical model of LCL-GCI are analyzed and then the sensor-less control technology without grid and capacitor voltage sensors for LCL-GCI is presented. The active damping control of LCL-GCI is realized using the capacitor current feed-forward which is fetched by the LCL capacitor observer in the case of only detecting the converter current and DC-link voltage. In the design of observer, the low-pass filter is used to replace the pure integrator to obtain strong ability of anti-load disturbances. Experimental results show that the voltage sensor-less control technology can observer the grid voltage and capacitor voltage precisely, make the system working steadily and has good anti-disturbance ability, and decrease the numbers of used sensors, reduce the system control cost and has great application values.

Key words： LCL filter wind grid connection inverter(GCI) voltage sensor-less control virtual flux observing

收稿日期: 2011-06-08 出版日期: 2013-11-27

PACS:

TM461

基金资助:上海市科学基金资助项目 (08DZ1200504)。

作者简介: 王晗男,1982年生,博士研究生,主要研究方向为大功率风力发电功率变换与并网技术。窦真兰女,1980年生,博士研究生,主要研究方向为风力发电。

引用本文:

王晗, 窦真兰, 张建文, 蔡旭. 基于LCL的风电并网逆变器无传感器控制[J]. 电工技术学报, 2013, 28(1): 188-194. Wang Han, Dou Zhenlan, Zhang Jianwen, Cai Xu. Study on Voltage Sensor-less Control for Wind Grid Connection Inverter with LCL Filter. Transactions of China Electrotechnical Society, 2013, 28(1): 188-194.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I1/188

[1] Blaabjerg F, Teodorescu R, Liserre M, et al. Overview of control and grid synchronization for distributed power generation systems[J]. IEEE Transactions on Industry Applications, 2006, 53(5): 1398-1409.
[2] Singh B, Singh B N, Chandra A, et al. A review of three-phase improved power quality AC-DC converters[J]. IEEE Transactions on Industrial Electronics, 2004, 51(3): 641-660.
[3] Agriman I, Blasko V. A novel control method of a VSC without AC line voltage sensors[J]. IEEE Transactions on Industry Applications, 2003, 39(2): 519-524.
[4] 赵仁德, 贺益康. PWM整流器虚拟电网磁链定向矢量控制仿真研究[J]. 电力系统及其自动化学报, 2005, 17(5): 94-98.
[5] 赵仁德, 贺益康. 无电网电压传感器三相PWM整流器虚拟电网磁链定向矢量控制研究[J]. 中国电机工程学报, 2005, 25(20): 56-61.
Zhao Rende, He Yikang. Virutal line-flux-linkage oriented vector control of three-phase voltage source PWM rectifier without line voltage sensors[J]. Proceedings of the CSEE, 2005, 25(20): 56-61.
[6] 吴凤江, 汪之文, 孙立. PWM整流器的改进虚拟磁链定向矢量控制[J]. 电机与控制学报, 2008, 12(5): 504-508.
Wu Fengjiang, Wang Zhiwen, Sun Li. Improved virtual flux oriented vector control of PWM rectifier[J]. Electric Machines and Control, 2008, 12(5): 504-508.
[7] 杨勇, 阮毅, 汤燕燕, 等. 不连续空间PWM的无电网电压传感器的三相并网逆变器[J]. 电力自动化设备, 2009, 29(11): 92-97.
Yang Yong, Ruan Yi, Tang Yanyan, et al. Three- phase grid-connected inverter based on DSVPWM without grid voltage sensor[J]. Electric Power Automation Equipment, 2009, 29(11): 92-97.
[8] Blasko V, Kaura V. A novel control to actively damp resonance in input LC filter of a three-phase voltage source converter[J]. IEEE Transactions on Industry Applications, 1997, 33(2): 542-550.
[9] 黄宇淇, 姜新建, 邱阿瑞. LCL滤波的三相整流器主动阻尼控制方法[J]. 电力自动化设备, 2009, 29(2): 26-29.
Huang Yuqi, Jiang Xinjian, Qiu Arui. Active damping control of three-phase rectifier with LCL-filter[J]. Electric Power Automation Equipment, 2009, 29(2): 26-29.
[10] 孙蔚, 伍小杰, 戴鹏, 等. 基于LCL滤波器的电压源型PWM整流器控制策略综述[J]. 电工技术学报, 2008, 23(1): 90-96.
Sun Wei, Wu Xiaojie, Dai Peng, et al. An overview of current control strategy for three-phase voltage- source rectifier with LCL-filter[J]. Transactions of China Electrotechnical Society, 2008, 23(1): 90-96.
[11] 王要强, 吴凤江, 孙力, 等. 带LCL输出滤波器的并网逆变器控制策略研究[J]. 中国电机工程学报, 2011, 31(1): 34-39.
Wang Yaoqiang, Wu Fengjiang, Sun Li, et al. Control strategy for grid-connected inverter with an LCL output filter[J]. Proceedings of the CSEE, 2011, 31(1): 34-39.
[12] 陈瑶, 金新民, 童亦斌. 三相电压型PWM整流器网侧LCL滤波器[J]. 电工技术学报, 2007, 22(9): 124-129.
ChenYao, JinXinmin, Tong Yibin. Grid-side LCL-filter of three-phase voltage source PWM rectifier[J]. Transactions of China Electrotechnical Socienty, 2007, 22(9): 124-129.
[13] 李欣然, 郭希铮, 王德伟, 等. 基于LCL滤波的大功率三相电压型PWM整流器[J]. 电工技术学报, 2011, 26(8): 79-84.
Li Xinran, Guo Xizheng, Wang Dewei, et al. Research and development of high-power three-phase voltage source PWM rectifier with LCL filter[J]. Transactions of China Electrotechnical Society, 2011, 26(8): 79-84.
[14] 孙大南, 刁利军, 刘志刚. 交流传动矢量控制系统时延补偿[J]. 电工技术学报, 2011, 26(5): 138-145.
Sun Danan, Diao Lijun, Liu Zhigang. Time-delay compensation about AC drive vector control system[J]. Transactions of China Electrotechnical Society, 2011, 26(5): 138-145.
[15] Simone Buso, Paolo Mattavelli. Digital control in power electronics[M]. USA: Morgan & Claypool Publishers, 2006.