Development of 125kW grid-tied PV inverter and research on efficiency vs. transformer turn ratio

This paper reviewed the development of a 3-phase 125 kW grid connected PV inverter and changes in the conversion performance of the inverter based on the gain of the low frequency isolation transformer for isolation between solar and the grid. The 125 kW PV inverter consists of a transformer with th...

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Bibliographic Details
Published inINTELEC 2009 - 31st International Telecommunications Energy Conference pp. 1 - 3
Main Authors Bong-Joo Choi, Yong-Seung Oh, Kang-Soon Ahn, Hee-Jun Kim
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2009
Subjects
Computer science
Frequency conversion
Inductors
Insulated gate bipolar transistors
Performance gain
Power generation
Power transformer insulation
Pulse width modulation inverters
Reactive power
Voltage control
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Summary:This paper reviewed the development of a 3-phase 125 kW grid connected PV inverter and changes in the conversion performance of the inverter based on the gain of the low frequency isolation transformer for isolation between solar and the grid. The 125 kW PV inverter consists of a transformer with the grid frequency for isolation between input and output (galvanic isolation) and it has the output power of 60 Hz, 3P 3 W 380 Vac. P&O technique was used for MPPT (Maximum Power Point Tracking) and Active Phase Shift technique was used through changes in reactive power to prevent a islanding operation. Inverter control was achieved based on 16-bit DSP. This paper discussed about the conversion performance of the 125 kW inverter in relation to the system and the result of development of THD, MPPT etc and mentioned about the result of comparison of the conversion performance of the inverter based on the efficiency of the low frequency transformer.
ISBN:1424424909
9781424424900
ISSN:0275-0473
2158-5210
DOI:10.1109/INTLEC.2009.5351932