Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
An Adaptive Zone Based MPPT Scheme for Exploiting the Maximum Power from The Solar PV Array
Categories for this Invention
Category – Energy Energy Storage and Renewable Technology
Applications –Solar energy converters, clean energy systems
Industry – Energy / Infrastructure
Market -Photovoltaic Market Size was valued at USD 93.15 Billion in 2022 and is expected to reach USD 243.81 Billion by 2032, at a CAGR of 10.1%
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Problem Statement
- Solar photovoltaic (PV) systems are widely accepted in recent times but are heavily dependent on the irradiance level, which fluctuates throughout the day; hence to overcome this a power electronic converter is essential
- Maximum Power Point Tracking (MPPT) is employed but are subjected to increased steady-state error, selection of parameters, such as the step-size and frequency of perturbation, impacting the performance of MPP tracking
Technology
The present invention discloses a method for Maximum Power Point Tracking (MPPT) in a solar photovoltaic (PV) system, which includes:
Operating Zone Identification:
- The solar PV system identifies an operating zone based on zone boundaries.
- Zone boundaries are defined according to the present operating solar PV current.
Direction Adjustment of Perturbation Step-Size:
- The solar PV system automatically adjusts the direction of a perturbation step-size based on the identified operating zone.
- The direction adjustment is performed to optimize MPPT.
Optimal MPPT Identification:
- The solar PV system identifies an optimal MPPT based on the adjusted direction of the perturbation step-size
The invention further includes a solar photo-voltaic (PV) system comprising:
- The said MPPT controller comprising Identification of operating zone based on defined boundaries, Automatic adjustment of perturbation step-size direction based on the operating zone and Identification of MPP tracking based on adjusted perturbation
- The perturbation step-size for each zone is different and wherein the perturbation step-size varies adaptively for non-MPP zones and transitions zones.
- Automatic Direction Adjustment involves determination in MPP zone available and non-available areas
Key Features / Value Proposition
Technical Perspective:
- The present invention discloses solar photovoltaic (PV) Maximum Power Point Tracking (MPPT) technique and the adaptive zone based perturbs and observes (P&O) MPPT technique that is used to exploit maximum power from the solar PV array.
- The buck-boost converter helps in implementation due to high DC voltage gain, continuous input and output current and better transformer utilization.
- The said technique improves both the steady-state and dynamic performance under changing climatic conditions with natural drift-free tracking
User Perspective:
- Used to improve a steady-state MPPT efficiency and tracking speed under constant/slow/fast varying irradiance conditions.
- No additional sampling and sensors apart from voltage and current sensors required.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. LAKSHMINARASAMMA N
Department of Electrical Engineering
Intellectual Property
- IITM IDF Ref. 1778
- IN471082- Granted
Technology Readiness Level
TRL – 4
Technology validated in lab scale.