Development of a Control Algorithm of the Power Converter for Solar Photovoltaic

The power converter for solar photovoltaic is considered, which contains one input choke, two transistors, two diodes and two output capacitors. The phase shift of the switching transistors of such a converter provides a doubling of the ripple frequency of the input choke current. This is due to the relatively small mass and cost of the converter. The use of a solar battery as a primary source of electricity and a three-level output DC/AC converter together with a rechargeable battery as a load determine the tasks of control this power converter. It is necessary that the control system is capable of both stabilizing the output voltage and limiting the output current, and working in the mode of searching for the peak power point of the solar battery. In order to create a control algorithm, a mathematical model of power converter for solar photovoltaic has been developed. The obtained mathematical model allowed to develop a control algorithm for the power converter concerned. A prototype of a power converter with a switching frequency of transistors equals 25 kHz and with an output power of 20 kW has been tested. The results obtained during the development of the control algorithm and testing of the prototype of the PC will be useful both for engineers developing converter equipment and for software engineers developing control for pulse converters.