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Stationary Frame Current Regulation of PWM Rectifiers Based on Predictive Control |
Song Zhanfeng1, Xia Changliang1, 2, Gu Xin2 |
1. Tianjin University Tianjin 300072 China 2. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tianjin Polytechnic University Tianjin 300387 China |
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Abstract The finite control set model predictive control strategy can regulate α-and β-currents of pulse-width modulation (PWM) rectifiers. However, the main advantages are non-constant switching frequency and current ripples. This paper proposed a novel current regulation strategy of PWM rectifiers based on optimum time sequence in stationary frame. The proposed strategy selected active voltage vectors based on the location information of grid voltage vector. A cost function based on the current error was then constructed. The action time of each active vector was calculated by minimizing the cost function. The experimental results indicate that the proposed current control scheme achieves flexible current regulation in stationary frame, inheriting the merit of finite-state predictive control and realize the rapid dynamic response, but also ensure the constant switching frequency and improve the steady-state control effect.
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Received: 12 November 2012
Published: 25 March 2014
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