Outline

  • Abstract
  • Keywords
  • 1. Introduction
  • 2. Methodology
  • 2.1 Weather Station and Pv Array
  • 2.2 High Power Inverter
  • 2.3 Proposed Topology of High Power Tpvi
  • 4. Result and Discussion
  • Conclusion
  • References

رئوس مطالب

  • چکیده
  • کلیدواژه ها
  • 1. مقدمه
  • 2. روش شناسی
  • 2.1. ایستگاه هواشناسی و آرایه PV
  • 2.2. اینورتر یا متناوب ساز با قدرت بالا
  • 2.3. توپولوژی پیشنهادی TPVI قدرت بالا
  • 3. شرایط راه اندازی آزمایشی
  • 4. نتایج و بحث
  • نتیجه گیری

Abstract

This paper presents a new topology of high power three-level transformerless photovoltaic inverter (TPVI). It consists of three main circuits; they are a pulse driver circuit, a full bridge inverter (FBI) circuit and a power factor correction (PFC) circuit that have functions as production of pulse waves, to develop alternating current (AC) waveform and to stable voltage of PV array, respectively. To obtain the high power of the TPVI, five FBI circuits are connected in parallel. Each FBI circuit uses MOSFET IRFP460 which has rating current of 20 A, therefore the total FBI circuit has applicable maximum current of 100 A. The high power TPVI is installed in front of Centre of Excellence for Renewable Energy (CERE), Universiti Malaysia Perlis, Northern Malaysia. Its main energy source is a PV array that consists of three unit PV modules are connected in series, each unit has 81 V, 60 W. Some three unit PV modules are connected in parallel to fulfill the demand of high AC power. In this research, an AC three-level waveform of the TPVI is developed and created by a microcontroller PIC16F627A-I/P.

Keywords: - - - -

Conclusions

According to result shown, the proposed topology can be applied to the high power three-level single phase TPVI, from the result can be summarized as below :

  1. The Solar irradiance and temperature affect the PV array voltage. The PV array voltage directly is converted become AC voltage using FBI circuit.
  2. Some FBI circuits can be connected in parallel to obtain high AC power. Using MOSFET IRFP460 of the FBI circuit which has rating current of 20 A, therefore the total five FBI circuits have applicable maximum current of 100 A. If it is applied into 240 V AC system, therefore each FBI has applicable maximum power of 4.8 kW. For fiveFBI connected in parallel equals 5 x 4.8 kW.
  3. AC three-level voltage waveform has maximum voltage angle, D of 1340 with AC current waveform depends on type of AC loads which affect current harmonic spectrum and current total harmonic distortion.
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