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Perturb and Observe with Momentum Term applied to Current Referenced Boost Converter for PV Interface

Raiker, Gautam A and Umanand, L and Reddy, Subba B (2018) Perturb and Observe with Momentum Term applied to Current Referenced Boost Converter for PV Interface. In: 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 18-21 Dec. 2018, Chennai.


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Official URL: https://doi.org/10.1109/PEDES.2018.8707630


The Photovoltaic (PV) current follows the same direction as the perturbed duty cycle for a DC-DC converter interfaced PV system. Hence current referenced control is well suited for Maximum Power Point Tracking (MPPT). A small signal model for a Boost converter with PV is developed, which gives the input current to duty cycle control signal transfer function in order to design the controller. In addition to the inner current control loop, an MPPT control loop is added to track the Maximum Power Point (MPP). The standard Perturb and Observe (P&O) Algorithm has an inherent trade-off between dynamic performance during rapidly changing irradiation conditions and oscillations about the MPP. To overcome this problem a Momentum term is introduced in the perturbation of the reference control signal in order to accelerate tracking and to reduce oscillations. The Momentum term which is a scaled version of the previous perturbation can be easily implemented in the existing P&O algorithms, with only slight modification and almost no change in computational effort.

Item Type: Conference Proceedings
Publisher: IEEE
Additional Information: The copyright for this article belongs IEEE
Keywords: Boost Converter; Photovoltaics (PV); Maximum Power Point Tracking (MPPT); Perturb and Observe (P&O); Small Signal Analysis; Momentum Term; Current Controller
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering > Electrical Communication Engineering - Technical Reports
Date Deposited: 20 Jun 2019 16:56
Last Modified: 21 Jun 2019 19:17
URI: http://eprints.iisc.ac.in/id/eprint/62993

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