A review on modulation techniques of Z-source network

Impedance source converters, are very fast growing technology for electrical energy conversion and particularly appropriate for distributed energy generation. These network avoid limitation associated with traditional voltage and current source converter by adding additional state, called as shoot-through state. These shoot-through states can be controlled by various control methods and pulse width modulation (PWM) techniques to control output voltage and current at required level. This paper provides broad review on various modulation techniques used in Z-source network for ac-dc and dc-dc power conversion. This paper also provides comparison between various parameter related to PWM techniques.