Energy Harvesting and Energy Efficiency pp 143-176 | Cite as
Energy Harvesting from the Photovoltaic Hybrid Power Source Based on Extremum Seeking Control Schemes
Abstract
The energy harvesting is known as the conversion process of ambient energy into usable electrical energy. The energy of the renewable and green Energy Sources (ES) is free and available without territorial restrictions. In this chapter the possibility to use the Extremum Seeking Control schemes for harvesting the solar energy via a Photovoltaic Hybrid Power Source is presented. The new ESC schemes based on a band-pass filter instead of the series combination of high-pass and low-pass filters are analyzed in order to evaluate their performance. The performance indicators used are the search speed and the tracking accuracy. The simulations performed highlight the advantages of the Extremum Seeking Control schemes based on a band-pass filter in comparison with the classical Extremum Seeking Control schemes. A Maximum Power Point tracking technique based on a modified Extremum Seeking Control slightly improves the energy efficiency of the Photovoltaic Hybrid Power Source. The advanced Extremum Seeking Control scheme reduces the power ripple, so the energy efficiency of the Photovoltaic Hybrid Power Source increases as well. The analysis of the dither persistence in the Extremum Seeking Control loop scheme shows the relations between the search speed and the derivatives of the Photovoltaic power. The ratio of these search speeds is also used as the performance indicator. Finally, the dynamical operation of the Photovoltaic Hybrid Power Source under variable irradiance profile is shown.
Keywords
Photovoltaic Hybrid Power Source (PVHPS) Extremum Seeking Control (ESC) Maximum Power Point (MPP) Search speed Tracking accuracy Energy harvesting Harmonics analysisAbbreviations and Acronyms
- aESC
Advanced ESC
- BPF
Band-pass filter
- CS
Charge-sustaining
- CI
Charge-increasing
- CD
Charge-depletion
- DG
Distributed generation
- EMS
Energy management strategy
- ESC
Extremum seeking control
- ESS
Energy storage system
- ES
Energy source
- EQ
Equivalence
- FW
Freewheeling diode
- FC
Fuel cell
- GMPP
Global MPP
- HPS
Hybrid power source
- HT
Hydro-turbines
- HF
High frequency
- hoESC
High-order ESC
- HPF
High-pass filter
- IC
Incremental conductance
- IGBT
Insulated-gate bipolar transistor
- LF
Low frequency
- LPF
Low-pass filter
- MEP
Maximum efficiency point
- MPP
Maximum power point
- MPPT
MPP tracking
- mESC
Modified ESC
- P&O
Perturb & observe
- PV
Photovoltaic
- PVHPS
Photovoltaic hybrid power source
- WT
Wind turbine
Notes
Acknowledgements
The research that led to the results shown here has received funding from the project “Cost-Efficient Data Collection for Smart Grid and Revenue Assurance (CERA-SG)”, ID: 77594, 2016-19, ERA-Net Smart Grids Plus. Some figures, tables and text are reproduced from [21, 22, 26] here with kind permission from Elsevier Limited, UK, WCST, UK, and APPEL, CZ [September 13, 2016].
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