Experimental research of a prototype multi-level inverter rated at 6 kW, when powered by 12 batteries

This article discusses a multilevel inverter transistor 6 kW, powered by 12 batteries to convert solar energy into electricity. A voltage can be received from the output of multi-leveled transistor inverter that is close to sinusoidal form.
The main purpose of the inverter is to convert solar energy into electric power of commercial frequency. Analysis of the received data of curved output voltage tot he sinusoidal was held.
The articles ets out developed scheme of multi-leveled transistor inverter (DC-AC converter) that all ows to obtain the voltage in the output close to the sinusoidal voltage and regulation level of out put voltage.
Its hould be noted be that the value of voltage a teach level maybe the same or different and there for the commutation time of each level will be correspondingly different. With regards to abovementioned statement, the calculation method is determined for each voltage level as well as for angle (time) commutation of solar batteries. This is base don’t he condition that the multi-level inverter voltage in the output describes very close for sinusoid.
Further more, calculation of commuting angles for eight, twelve, and twenty-six levels has been done according tot his method. In order to find the optimal option, calculations were modeled and analyzed.
In the paper, results of computer simulation and experimental research are presented.
The results and experimental research analysis lead to the following conclusions:
- The proposed scheme of solar panels connection to the inverter
through the commutator allows to save solar elements amount, to decrease solar elements cost and to increase efficiency coefficient of the whole system;
- The worked out system “solar panels-commutator-inverter
load” allows to get sine wave form of voltage curve with 8 and more levels of voltage at the input of inverter;
- Operation principle of the system “solar panels-commutator
inverter-load” is experimentally confirmed as well as the results of computer modeling and the results of calculation of voltage level and commutation angle.

Author: Kyrmyzy Taissariyeva
Conference: Title