Case 14725

Per Panel Photovoltaic Energy Extraction with Multilevel Output DC-DC Switched Capacitor Converters

Keywords:

Switched capacitor, module integrated converters, photovoltaic, ripple port inverter

Applications:

Widespread grid generation of PV

Problem:

Electrolytic capacitors and per panel magnetics have limited lifetime and are expensive.

Technology:

This invention proposes per-panel Maximum Power Point Tracking (MPPT) for widespread solar arrays. A full system approach is presented, utilizing switched capacitor multi-level DC-DC and a central ripple-port inverter to replace the multiple inductors used in current PV technology.

Advantages:
  • Substantial cost reduction and prolonged lifetime
  • Average total efficiencies of tracking and conversion greater than 93% for a 510 W, 3 panel, DC-DC system.

Inventors:
  • Professor Steven B. Leeb (Department of Electrical Engineering and Computer Sciences)
  • John J. Cooley (Department of Electrical Engineering and Computer Sciences)

Intellectual Property:

US Patent Application Number 13/039382, filed on March 3, 2011

PCT Patent Application Number PCT/US2012/026015, February 22, 2012

Publications:

Applied Power Electronics Conference Proceedings 2011

Last revised: April 30, 2013

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