LCC Resonant Power Electronic Converter for Photovoltaic System with Battery Energy Storage

Abstract

AbstractPower electronic converters are an integral elementof power generation systems based on renewable energy sourceswhich is photovoltaic array. Converters enable the control andcorrection measures of current and voltage characteristics on theoutput of the power plant, as well as proper operation of energystorage device. Moreover, such converters facilitate and controlpower load of the power electronic system. Particular interestshould be paid to the parameters of the converter responsible forthe operation of the energy storage device. It should becharacterized by: easiness of control, low costs and especiallyhigh efficiency. The authors suggestion for this application is toimplement a resonant LCC converter in a three-phase convertersystem. Research of the device has been conducted in a onedimensionalenergy flow version. Tests for resonant system andhard switching have also been done. Conducted tests provideevidence of the converters high efficiency at the voltage level ofthe rated voltage. The results prove that the mentioned converteris appropriate for application in cooperation with a batteryenergy storage device. What is more, the dynamic and staticcharacteristics of the investigated converter are also satisfactory.Still, in order to facilitate the formation of new convertersprototypes, the authors designed a universal bridge system with adriver. Suggested model enables formation of devices with thepower range from hundreds of watts to several dozens ofkilowatts4 Halama