The aim of this study is to calculate the size of the stand-alone solar photovoltaic generator and water pumping system for irrigation. In addition solar photovoltaic generator connects voltage source inverter to vector controlled induction motor-pump system. Perturb and observe method is used for harvesting maximum power of photovoltaic generator. The smooth-starting of motor pump drive is achieved through the maximum power point tracking method. The operational performance of the solar-water-pump system is kept at 60 m head and supply daily average 35,000 L/day. In this paper result is validated by the comparison fuzzy logic controller and proportional integral controller, driven by solar-motor-pump system. The results confirmed that fuzzy logic controller based pumping system gives more accurate results as compared to proportional integral controller based motor-pump system. The fuzzy logic controller increases the accuracy and efficiency of the solar-water-pump system.
- Fuzzy logic control
- Induction motor
- Maximum power point tracking
- Photovoltaic water pumping system
- Perturb and observe
- Variable frequency drives
Figure 1. Schematic diagram of FLC.
EXPECTED SIMULATION RESULTS:
Figure 2. PV generator parameters at various insolations.
Figure 3. Motor-pump set parameters at various speed.
Figure 4. Motor-pump set parameters at various isolations.
Figure 5. Flow rate and pump efficiency in PI controller at various insolations.
Figure 6. Motor-pump speed variation in each controller.
Figure 7. Flow rate and pump efficiency in FLC controller at various insolations.
The pumping scheme was mounted on a bore in nursery and orchard at Indore at solar intensity of 5.63kWh/m3/day, to provide irrigation and drinking water. The solar water supply scheme is experimented under various climatic conditions. The overall performance of the system is presented at 60 m head and daily average supply of 35,000 L/day. Figures 8 to 10 show the starting and steady-state performance of motor side parameters like motor speed, electromagnetic torque and stator current at various speeds. Results show the smooth and stable starting performance of solar water pumping system is achieved at various motor speeds. It is clear from the graph that the water flow rate and pump efficiency increase when the solar intensity increases. Figure 12 shows comparison between FLC and conventional PI controller at different reference speeds. While starting, PI controller overshoot and settle time are higher than as compared to FLC. After analysis of different speed, it was clearly indicated that PI controller based drive system overshoot and settled time are more than as compared to the FLC based drive system. During the variation of speed, FLC based drive reaches operating point earlier as compared to PI based drive. The FLC increases the accuracy and efficiency of the solar-water-pump system as compared to PI controller based drive. In this present paper, it is studied that the solar water pumping system is improving the living standard in remote areas and also improving the environmental conditions. The design solar-water-pump system is more reliable, supplies electricity and more efficiently with automatic control.
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