Banes and Boons of Perturb & Observe, Incremental Conductance and Modified Regula Falsi Methods for Sustainable PV Energy Generation

YATINDRA GOPAL, Krishan Kumar, Dinesh Birla, Mahendra Lalwani


Maximum power point tracking (MPPT) optimizes overall power generation in photovoltaic (PV) applications. The voltagepower
characteristics of PV array operating under variable irradiance and temperature conditions exhibit numerous local
maximum power points (MPP). This paper presents the optimization method of MPP tracking, based on the modified Regula
Falsi method (MRFM). Results of this method are compared with the conventional perturb & observe (P&O) method and the
incremental conductance (IC) method. The modified Regula Falsi method has better convergence, lower oscillation time, less
power loss and enhanced output power than the other two methods. To obtain a stable voltage from a solar array, a DC-DC
Cuk converter is used. It can step-up and step-down the voltage level according to load requirement. Results have been
verified on the MATLAB platform in variable environmental conditions.


Photovoltaic, Maximum power point tracking, Perturb & observe, Incremental conductance, Modified Regula Falsi method, Cuk converter

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