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| Current Controller Optimum Design for Three-Phase Photovoltaic Grid-Connected Inverter |
| Dou Wei, Xu Zhengguo, Peng Yanchang, Li Jing, Xu Honghua |
| Institute of Electrical Engineering , Chinese Academic of Science Beijing 100080 China |
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Abstract Three-phase grid-connected voltage source inverter(VSI) is often used to feed high quality current into grid in photovoltaic(PV) power generation system. But many factors, such as switching dead-time effects and disturbance of grids etc, will deteriorate the current waveform, and a large number of harmonic will be fed into grid too. Owing to the conflict between stability and fast response, proportional-integral (PI) controller has limited capabilities to restrain harmonic disturbances and can not guarantee the output performance of grid-connected inverter, so a new control algorithm using compound controller constituted by repetitive controller(RC) and PI controller is proposed in this paper to overcome the shortcomings of PI controller in harmonic control. A dynamic model of grid-connected inverter in synchronous rotating frame(SRF) is derived and the compound current controller design is presented too. Theoretic analysis and experimental results on a 20kW prototype verify that the proposed current controller offers a high performance of current control.
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Received: 20 June 2008
Published: 04 March 2014
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| About author:: Dou Wei male, born in 1977, PhD degree, his research interests are in power electronics and control technique in PV power generation systems.Xu Zhengguo male, born in 1974, PhD degree, his research interests are in power electronics and control technique in PV power generation systems. |
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[1] Beck Y, Bishara B, Medini D. Connecting an alternative energy source to the power grid by a DSP controlled DC/AC inverter [C]. Power Engineering Society Inaugural Conference and Exposition in Africa, 2005: 120-124.
[2] Victor M, Cardenas G, Sergio Horta M, et al. Elimination of dead-time effects in three phase inverters [C]. IEEE CIEP Conf. Rec., 1996:258-262.
[3] Garcia Cerrada A, Roncero Sanchez P, et al. Detailed analysis of closed-loop control of output-voltage harmonics in voltage-source inverters [J]. IEE Proc. Electr. Power Appl., 2004, 151(6): 734-743.
[4] Duan Shanxu, Sun Zhaohui, et al. A compensation strategy for dead-time effect of SPWM inverters based on repetitive control[J]. Transactions of China Electrotechnical Society, 2004, 19(2): 52-57.
[5] Kong Xuejun, Wang Jingjiang, et al. The control scheme of three-phase voltage-source inverter output waveform based on internal model theory [J]. Proceedings of the CSEE, 2003, 23(7): 67-70.
[6] Wei Xueliang, Dai Ke, et al. Performance analysis and improvement of output current controller for three-phase shunt active power filter [C]. IEEE Industrial Electronics, IECON, 2006: 1757-1762.
[7] George Ellis. Control system design guide: using your computer to develop and diagnose feedback controllers [M]. San Diego: Academic Press, 1991.
[8] Burup U, Prasad P N, et al.A new space-vector-based control method for UPS systems powering nonlinear and unbalanced loads [J]. IEEE Transactions on Industry Applications, 2001, 37(6): 1864-1870.
[9] Zeng Qingrong, Chang Liuchen. Development of an SVPWM-based predictive current controller for three-phase grid-connected VSI [C]. IEEE IAS Conf., 2005: 2395-2400.
[10] Li M, Xing Y. Digital voltage regulation with flux balance control for sine wave inverters[C]. IEEE APEC Conf. Rec., 2004:1311-1314.
[11] Zhang K, Kang Y. Direct repetitive control of SPWM inverter for UPS purpose [J]. IEEE Transactions on Power Electronics, 2003, 1(3): 784-792.
[12] Harold L Broberg, Richard G Molyet. A new approach to phase cancellation in repetitive control[C]. IEEE IAS Conf. Rec., 1994: 1766-1770.
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2010, Vol. 25 
