Zero-sequence Circulation Suppression Algorithm Based on SVPWM
Aiming at the problem of zero-sequence circulation in the inverter parallel system,a zero-sequence circulation suppression algorithm based on space vector pulse width modulation(SVPWM)was proposed.After the virtual impedance is introduced,the action time of the zero vector in the SVPWM is dynamically adjusted to achieve the purpose of circulation suppression.A Simulink simulation model of the inverter parallel system was built to verify the zero-sequence circulation suppression algorithm based on SVPWM.The results show that the peak value of zero-sequence circulation gradually decreases from±4 A to about 0 under the condition of different output filter inductances.
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