Abstract：The paper proposes a novel deadbeat decoupling control strategy based on discontinuous PWM (DPWM) according to the characteristics of three-phase grid-connected inverters. The new deadbeat controller can reduce the ripple and distortion of output currents at the same sampling frequency compared with traditional deadbeat controller without control time delay compensation, which will improve the performance of the three-phase grid-connected inverter. Different discontinuous PWM are analyzed and the mode of discontinuous pulse width modulation 1 (DPWM1) is adopted in view of the characteristics of three-phase grid-connected inverters. It is realized the decoupling control of d-axis current and q-axis current under using grid voltage orientation vector control and deadbeat control, which makes the active power and the reactive power be independently controlled by d-axis current and q-axis current. The deadbeat controller with control time delay compensation has a fast dynamic response, which really realizes getting the given values in one step. The experimental results show that the proposed deadbeat decoupling control strategy provides a high performance solution for three-phase grid-connected inverters, which verifies the feasibility and correctness of the control strategy at the same time.
杨勇, 阮毅, 吴国祥, 赵景波. 基于DPWM1的无差拍解耦控制的三相并网逆变器[J]. 电工技术学报, 2010, 25(10): 101-107.
Yang Yong, Ruan Yi, Wu Guoxiang, Zhao Jingbo. Deadbeat Decoupling Control of Three-Phase Grid-Connected Inverters Based on DPWM1. Transactions of China Electrotechnical Society, 2010, 25(10): 101-107.
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