Title :
A new panel-integratable inverter concept for grid-connected photovoltaic systems
Author :
Lohner, A. ; Meyer, T. ; Nagel, A.
Author_Institution :
Dept. for Power Electron. & Electr. Drives, Tech. Hochschule Aachen, Germany
Abstract :
This paper describes the problems of conventional inverter concepts for photovoltaic power systems and presents a new, panel-integratable inverter concept as a solution. This concept is advantageous regarding safety (no DC-lines), flexibility (modular concept), converted energy per year (no mismatch losses due to individual MPP tracking of each panel) and costs (no reinforced isolation due to AC distribution). Furthermore a 250 W DC to AC inverter is developed, which consists of a series resonant DC-DC power converter and a line inverter. The inverter has a high efficiency and consumes little power itself. Meeting international standards, sinusoidal line current with low distortion is achieved. The inverter has a built-in controller to operate the panel in the maximum power point. Above this, the concept allows the flexible use with many different combinations of solar panels. To realize an inexpensive system, the controller is built up using standard low-cost components
Keywords :
DC-AC power convertors; DC-DC power convertors; field effect transistor switches; invertors; photovoltaic power systems; power MOSFET; power field effect transistors; power semiconductor switches; resonant power convertors; solar cell arrays; solar cells; 250 W; AC distribution; DC to AC inverter; efficiency; flexibility; grid-connected PV power systems; international standards; line inverter; maximum power point; panel-integratable inverter concept; safety; series resonant DC-DC power converter; sinusoidal line current; solar panels; Analog-digital conversion; Costs; Inverters; Joining processes; Paper technology; Photovoltaic cells; Photovoltaic systems; Power electronics; Resonance; Safety;
Conference_Titel :
Industrial Electronics, 1996. ISIE '96., Proceedings of the IEEE International Symposium on
Conference_Location :
Warsaw
Print_ISBN :
0-7803-3334-9
DOI :
10.1109/ISIE.1996.551050