Back to Search
Start Over
A MPPT Circuit With 25 \mu\textW Power Consumption and 99.7% Tracking Efficiency for PV Systems.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Feb2017, Vol. 64 Issue 2, p272-282. 11p. - Publication Year :
- 2017
-
Abstract
- A Maximum Power Point Tracking (MPPT) circuit for a 0.7-W photovoltaic (PV) system is proposed. The circuit employs a modified hill-climbing algorithm based on a 3-points comparison instead of the traditional 2-points comparison. The adopted algorithm simplifies the detection of the Maximum Power Point (MPP) and enables the implementation of a periodic sleep-mode to reduce the overall power consumption without compromising effective tracking of irradiance variations. Moreover, to achieve high MPP tracking efficiency, a low-power linear analog multiplier is implemented to accurately compute the instantaneous power of the PV source from its sensed voltage and current levels. This power-metering function is realized in the analog domain to eliminate the need for data converters and to minimize the MPPT circuit's power consumption. A complete design of the proposed circuit is implemented in 0.18- \mu\textm BiCMOS process in less than 1.55 mm 2 and consumes less than 25 \mu\textW with the digital core running at 500 kHz and a measured peak MPP tracking efficiency of 99.7%. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *MAXIMUM power point trackers
*DC-to-DC converters
*PHOTOVOLTAIC power generation
Subjects
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 64
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 121057035
- Full Text :
- https://doi.org/10.1109/TCSI.2016.2604224