A new modified MPPT controller for improved performance of an asynchronous motor drive under variable irradiance and variable temperature

Abstract

Solar energy is an important alternative out of the various renewable energy sources. On an average, the sunshine hour in India is about 6 h per day also the sun shines in India about nine months in a year. To generate electricity from the sun, solar photovoltaic (SPV) modules are used. The SPV comes in various power outputs to meet the load requirement. Maximization of power from a solar photovoltaic module is a special case to increase the efficiency of the SPV system. The maximum power point tracking (MPPT) controller is used to track the maximum power. DC–DC boost converter and space vector modulation-based inverter are used to provide the required supply to the load. Existed MPPT controller methods work with either constant irradiance with variable temperature or vice versa. But the proposed MPPT works with the variable irradiance and variable temperature. Here, a lot of improvement in torque and current ripple contents is obtained with the help of proposed MPPT. Also the better performance of an asynchronous motor drive is analyzed with the comparison of conventional and proposed MPPT controller using MATLAB-simulation results. Theoretical and practical validations are also carried, out and the comparison is made.

Keywords:

• Solar photovoltaic (SPV) system
• maximum power point tracking (MPPT) controller
• DC–DC boost converter
• space vector modulation (SVM)
• variable irradiance
• variable temperature
• asynchronous motor drive
• torque and ripple