A MAXIMUM POWER POINT TRACKING TECHNIQUE FOR SINGLE-PHASE PHOTOVOLTAIC SYSTEMS WITH REDUCED DC-LINK CAPACITOR

Electrolytic capacitors used in photovoltaic (PV) power conditioning units (PCU) for power decoupling purposes are less reliable in nature. Film capacitors can be adopted instead of electrolytic capacitors if the energy storage requirement of the PCU is reduced, since they offer better reliability and have a longer lifetime. The energy storage capacitor size reduction is facilitated by allowing DC-link voltage to have a specified amount of ripple. However, a high DC-link voltage ripple imposes a double-line frequency ripple in the PV panel voltage and current. This leads to oscillations in the extracted panel power and thereby results in power loss. In view of this, this thesis develops a locus line based maximum power point tracking (MPPT) control algorithm to mitigate this power loss. The proposed digital control algorithm was simulated in MATLAB Simulink and implemented in a laboratory prototype using the Digital Signal Processing (DSP)-based microcontroller, TMS320F28035.

Name thesis:degree_name

Master of Science in Electrical Engineering

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Houston

Year dc:date.issued

2012

Author dc:creator

• Yarlagadda, Sindhu Krishna 1987-

Advisor dc:contributor.advisor

• Shireen, Wajiha

Committee members dc:contributor.committeemember

• Chen, Yuhua
• Provence, Robert S.

• Maximum power point (MPP) tracking
• Photovoltaics
• Inverters
• DC-link capacitors

Statement dc:rights

• The author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/10657/819

OAI identifier oai:identifier

oai:uh-ir.tdl.org:10657/819