%0 Electronic Article %A Shweta Gautam %+ Department of Electrical Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, Uttar Pradesh, India %A Rajesh Gupta %+ Department of Electrical Engineering, Motilal Nehru National Institute of Technology, Allahabad 211004, Uttar Pradesh, India %K minimum switching frequencies %K FPGA-based implementation %K AC current %K boost rectifier %K hysteresis current controlled AC-DC grid connected converters %K average switching frequencies %K PSCAD-EMTDC software %K phase relation %K switching frequency unified time-domain formulation %K maximum switching frequencies %K grid voltage %K static synchronous compensator %K wind-turbine system %K single-phase systems %K hysteresis current controlled DC-AC grid connected converters %K grid interface %X This study presents a unified time-domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters. It is shown that the generalised expression of switching frequency obtained can be used for any mode of operation of the converter based on phase relation between the reference AC current and grid voltage. The presented analysis provides information of maximum, minimum and average switching frequencies for all modes of the converter operation. The analytical results derived under different configurations are verified through the experimental results obtained using FPGA-based implementation of the controller for the converter. The applications of the results are shown on the three different single-phase systems operating in current control mode: (i) static synchronous compensator, (ii) boost rectifier and (iii) grid interface of wind-turbine system. The results of switching operations in these applications are verified using simulation studies performed in power systems CAD/electromagnetic transients including DC (PSCAD/EMTDC) software. %@ 1755-4535 %T Unified time-domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters %B IET Power Electronics %D April 2013 %V 6 %N 4 %P 683-692 %I Institution of Engineering and Technology %U https://digital-library.theiet.org/;jsessionid=113w323uwq6ss.x-iet-live-01content/journals/10.1049/iet-pel.2012.0484 %G EN