Title :
Compensation Loop Design of a Photovoltaic System Based on Constant Voltage MPPT
Author :
Ye ZhiHao ; Wu Xiaobo
Author_Institution :
Inst. of VLSI Design, Zhejiang Univ., Hangzhou
Abstract :
This paper presents an approach to design a high performance compensation loop for a photovoltaic system based on constant voltage (CV) maximum power point tracking (MPPT) method, which is quite different from that of common DC/DC converter. The dynamic model of the power module, which is implemented by a Buck converter, is established using switch average model. Based on the analysis of the dynamic model, a PID controller is designed to compensate the loop. Wide phase margin, amplitude margin and bandwidth are achieved by introducing the compensation stage. Finally, the performance of the photovoltaic system with and without compensation is simulated and compared using Cadence Spectre.
Keywords :
DC-DC power convertors; photovoltaic power systems; power generation control; three-term control; Buck converter; Cadence Spectre; DC-DC converter; PID controller; compensation loop design; constant voltage maximum power point tracking method; photovoltaic system; switch average model; Bandwidth; Buck converters; DC-DC power converters; Multichip modules; Photovoltaic systems; Power system modeling; Switches; Three-term control; Tracking loops; Voltage;
Conference_Titel :
Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-2486-3
Electronic_ISBN :
978-1-4244-2487-0
DOI :
10.1109/APPEEC.2009.4918231
