Dynamic Analysis of the Proposed Bi-directional Converter for Charging and Discharging Operation

Abstract

Abstract

This paper proposes a fifth order bi-directional converter configuration with low current ripple on either side as well as good voltage conversion range having only three switches. This converter is implemented for load power levelling between a DC grid and secondary batteries. A comparative study of proposed topology with widely used bi-directional converter configurations is made and relative merits and demerits are pointed out. With state-space and discrete-time modelling techniques, the converter is modelled for charging and discharging operations. Converter components are designed with the help of time-domain analysis. To analyse system behaviour around the operating point, small-signal transfer functions are obtained. The methodology in controller design is presented and with direct digital design method, digital compensators are designed for charger and discharger operations using SISO design tool. Due to external disturbances and parameter variations, the operating point might shift, even under these conditions to ensure the controller stability; robustness analysis of the controller is carried out.

Keyword: Bi-directional converter, state space modelling, dynamic analysis

Cite this Article

Mukesh Kumar Gupta, Rameshwar Singh, Ashish Kumar Singhal. Dynamic Analysis of the Proposed Bi-directional Converter for Charging and Discharging Operation. Journal of Semiconductor Devices and Circuits. 2017; 4(2):      41–51p.