Existing Water Pumping System For Induction Motor Drive With Reduced Sensors Using Solar Power

EXISTING WATER PUMPING SYSTEM FOR INDUCTION MOTOR DRIVE WITH REDUCED SENSORS USING SOLAR POWER

PRESENTED BY B. MADHAN PRASATH

Abstract • A simple and efficient solar photovoltaic (PV) water pumping system utilizing an induction motor drive (IMD) is presented in this paper. This solar PV water pumping system comprises of two stages of power conversion. The first stage extracts the maximum power from a solar PV array by controlling the duty ratio of a DC-DC boost converter. The DC bus voltage is maintained by the controlling the motor speed. This regulation helps in reduction of motor losses because of reduction in motor currents at higher voltage for same power injection. To control the duty ratio, an incremental conductance (INC) based maximum power point tracking (MPPT) control technique is utilized. A scalar controlled voltage source inverter (VSI) serves the purpose of operating an IMD. The stator frequency reference of IMD is generated by the proposed control scheme. The proposed system is modeled and its performance is simulated in detail. The scalar control eliminates the requirement of speed sensor/encoder. Precisely, the need of motor current sensor is also eliminated. Moreover, the dynamics are improved by an additional speed feed forward term in the control scheme.

• EXISTING SYSTEM • Fuzzy-logic-based V/f control of the induction motor is proposed for the speed sensor less power-leveling system. Only two sensors, including one dc voltage sensor and one dc current sensor, are utilized. The flywheel is composed of two modes, namely, the speed picking-up control mode and the power control mode. According to the dc-link average current of an inverter, the rotating speed of the flywheel in the speed picking-up control mode is detected by regulating the output frequency and the output voltage based on fuzzy logic control. The power control mode consists of the outer voltage loop and the inner current loop.

DISADVANTAGE: • sensors are required • current stress is present • effectiveness is less due to speed reference

• PROPOSED SYSTEM • VSI is used to provide pulse width Modulated voltage input to the motor and pump assembly. The power from a PV array is regulated using an incremental conductance method to attain its maximum value with available radiation. The V/f control is used to give reference speed to IMD.

ADVANTAGE: • No sensors are required • Reduce stress • More efficient

Software Requirements: • Matlab 2015b Hardware requirements: • PIC controller • Switches • Pv panel with battery • Induction motor

Ideas: When solar panel are exposed to sunlight they generate electrical energy(DC).This generated electricity can be readily used or can be pumped into main utility grid(after inversion).We use drive circuits in this solar system.

solutions: This system directly uses the generated energy and it is effectively used . The drive circuit used to control the other electrical circuits. The batteries are not used in this so the cost is reduced. Brief Description: Existing pumps in the farms land are not available to deliever at potential because of discontinuity of electric supply presently available solar water pumps usually run with DC and are different from common sub mercible pump this proposal is to make pump with solar energy without use of batteries

prototype:

Technology stack

1. 2. 4. 5.

Pv panel Drive Dc-Dc converter Single phase inverter Ac motor

Usercase diagram:

How to execute: The sun rays directly falls on the solar panel and it generates a light energy. The light energy is converted into electrical energy by the circuit. The dc-dc converter is used to maintain a constant dc voltage. The drive circuit is used to control the entire circuit and the inverter is used to convert the dc to ac. The pump is run by the ac power.

Dependencies:  Pv panel  Drive circuits

Shows stopper: In recent days we use battery for the storage but in this proposed system the batteries are not used. This is used for the irrigation purpose , the low rating motors are used

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