Under the condition of high frequency operation and low control carrier ratio,the inverter has resonance spike suppression.An active damping adaptive control technology for inverter under high speed and low carrier frequency ratio sensing signal is proposed.Under the condition of high speed and low carrier frequency ratio sensing signal,the mathematical model of inverter is built.The active damping of the inverter is equivalent to a control voltage loop by the transfer function from output current to capacitor voltage and stator current.The parameters of the active damping adaptive control loop are adjusted,and the active damping adaptive control strategy of the inverter is formulated.The experimental results show that the stability margin of the technology decreases from 2.46 dB to 1.18 dB,which can ensure the stable operation of the inverter;Under different sampling frequencies,the inverter can be controlled to output the grid connected cur-rent with the same phase and frequency as the grid voltage.When the sampling frequency is 5.9f,the output grid connected current and voltage are sinusoidal,and the fluctuation range is[35 A,58 A]and[185 V,225 V]respectively,with good control effect.
关键词
传感信号/高速低载频比/有源阻尼控制/数学模型/逆变器
Key words
sensing signal/high speed and low carrier-frequency ratio/active damping control/mathematical model/inverter
维普
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