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| Double-Loop Digital Control Strategy Based on Proportional-Resonant Controller |
| Huang Ruhai, Xie Shaojun |
| Nanjing University of Aeronautics and Astronautics Nanjing 210016 China |
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Abstract Output voltage of the inverter can be obtained without steady state error using proportional-resonant (PR) control. The characteristics of digital resonant controller under two discrete forms are analyzed and compared, and it finally comes to be used with impulse invariant method. Double-loop control strategy based on PR control is designed detailedly in the discrete region. In order to reduce the influence of nonlinear load on output voltage, several harmonic resonant controllers are adopted. Both theory analysis and experimental result show that the inverter based on PR control has superior output characteristic using this method.
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Received: 02 November 2010
Published: 19 March 2014
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2012, Vol. 27 
