| Development of Current Controlled Grid-connected Microinverter for PV applications |
| Paper ID : 1069-IUGRC6 (R1) |
| Authors |
|
Alaa Ahmed Ismail *1, Mohamed Mahmoud Eldodor2, Amgad El Deib3 1Renewable Energy Engineering, Zewail City, Al Giza, Egypt 2University of science and technology at Zewail city 3Associate professor, Renewable energy engineering program director University of Science and Technology at Zewail city, Egypt, aeldeib@zewailcity.edu.eg |
| Abstract |
| Modern grid connected PV systems are becoming an integral part of zero net energy PV building integrated systems. Grid connected PV system topologies play a great role in harvesting the maximum available energy and determine the overall system efficiency. This work presents the development of a two-stage PV grid connected microinverter. The microinverter topology is based on using a low frequency transformer with a boost converter for the maximum power point tracking stage. The implementation phases included SIMULINK simulations and hardware development. Simulations of low frequency transformer-based topology achieved a system efficiency of 95 % with total harmonic distortion (THD) of 3%. The topology has proven an efficient tracking of the PV maximum power and DC link voltage set point. The hardware boards, DC-DC converter, DC-AC inverter, and control boards were all assembled and connected to the grid through a low-frequency transformer. The hardware achieved a conversion efficiency of the input energy of 94%. |
| Keywords |
| Microinverter, PV applications, two- stage DC/AC conversion. |
| Status: Accepted |