光伏并网逆变器非线性离散最速误差反馈控制策略

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Abstract The output current control with LC filter of PV grid-connected inverter (PVGCI) usually adopts linear control strategies in dq or αβ frame. It is difficult to resist adverse effects of uncertain factors produced by internal and external disturbances. As a result, the system has poor robustness. According to the rebuilding of nonlinear mathematical model of PVGCI, a new control method based on nonlinear time-optimal function combined with error feedback is proposed, to realize the rapid tracking of output current without steady state error and enhance the capability of disturbance-rejecting of the whole system. A prototype of three-phase grid-connected PV inverter is designed based on DSP2812. Experiments on this prototype verify the proposed method.

Key words： PV grid-connected inverter LC filter nonlinear control non-linear control discrete time-optimal function error feedback

Received: 05 January 2015 Published: 13 October 2016

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TM46

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	Articles by authors
	Zhang Guoyue
	Qi Donglian
	Zhang Jianliang
	Wu Yue

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Zhang Guoyue,Qi Donglian,Zhang Jianliang等. Control Strategy of Non-Linear Discrete Time-Optimal Error Feedback in PV Grid-Connected Inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(18): 116-123.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I18/116

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