LAB REORT2.docx

Ii connected the 24v ac power supply to the power

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ii. Connected the 24V AC power supply to the Power Input of Data Acquisition and Control Interface. iii. Connected the USB port of Data Acquisition and Control Interface to USB ports of the computer and turned on the 24V AC power supply for Data Acquisition and Control Interface unit. iv. Turned on the computer and started the data acquisition software LVDAC_EMS and selected the 240V and 50Hz as operating voltage and frequency. v. Set the main switch of the Four-Quadrant to the 0ff position, then connect the power input to an ac power outlet. IV. PROCEDURE: i. Connected the circuit as shown in the Figure Figure 12. Connection of Diode rectifier output to the load ii. Made the wind turbine generator operates as the wind speed is 4m/s. iii. Recorded the parameters of the wind turbine at a wind speed of 4m/s and tabulated in Table8. Table8. Parameters of wind turbine for different load at 4m/s Load (Ω) Speed (rpm) Torque (Nm) Mechanica l Power Current (A) Voltage (V) Electrica l Power 25
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(W) (W) 683 -0.086 -6.138 0.008 46.74 -0.153 1200 656 -0.113 -7.781 0.035 44.26 1.514 2400 654 -0.103 -7.073 0.017 44.32 0.672 3600 630 -0.123 -8.125 0.05 42.38 2.109 4800 665 -0.097 -6.763 0.009 45.09 0.284 6000 635 -0.119 -7.946 0.042 42.8 1.786 7200 649 -0.111 -7.441 0.025 43.85 1.069 8400 625 -0.128 -8.363 0.058 41.98 2.434 iv. Repeated the step iv for the wind speed of 7m/sand tabulated in Table9 Table9. Parameters of wind turbine for different load at 7m/s Load (Ω) Speed (rpm) Torque (Nm) Mechanica l Power (W) Current (A) Voltage (V) Electrica l Power (W) 1377 -0.015 -2.234 0.007 94.43 -0.09 1200 1343 -0.066 -9.252 0.076 91.49 6.929 2400 1360 -0.042 -5.945 0.038 92.88 3.504 3600 1327 -0.092 -12.74 0.112 90.06 10.06 4800 1368 -0.028 -4.057 0.02 93.63 1.782 6000 1334 -0.08 -11.17 0.094 90.65 8.514 7200 1350 -0.056 -7.914 0.057 91.95 5.18 8400 1316 -0.104 -14.39 0.129 89.21 11.52 v. Repeated the step iv for the wind speed of 10m/sand tabulated in Table10 Table10. Parameters of wind turbine for different load at 10m/s Load (Ω) Speed (rpm) Torque (Nm) Mechanica l Power (W) Current (A) Voltage (V) Electrica l Power (W) 2045 0.146 31.29 0.007 140.4 -0.0198 1200 2012 0.07 14.75 0.114 137 15.57 2400 2021 0.092 19.54 0.056 138.1 7.736 3600 1994 0.031 6.573 0.169 135.5 22.82 4800 2030 0.112 23.74 0.029 139.1 3.891 6000 2001 0.049 10.19 0.142 136.1 19.29 7200 2018 0.084 17.85 0.084 137.6 11.56 8400 1991 0.022 4.569 0.196 135 26.41 26
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vi. Plotted the torque Vs speed graph for different wind speeds 4m/s, 7m/s and 10m/s in Graph 10, Graph11 and Graph12 respectively. 620 630 640 650 660 670 680 690 -0.14 -0.12 -0.1 -0.08 -0.06 -0.04 -0.02 0 Torque Vs speed at 4m/s Speed Torque Graph 10. Torque Vs speed at 4m/s 1300 1320 1340 1360 1380 1400 -0.12 -0.1 -0.08 -0.06 -0.04 -0.02 0 Torque Vs speed at 7m/s Speed Torque Graph 11.Torque Vs speed at 7m/s 27
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19801990200020102020203020402050 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 Torque Vs speed at 10m/s Speed Torque Graph 12. Torque Vs speed at 10m/s vii. Close LVDAC-EMS, and then turn off the equipment. Remove all the connected cables and leads V. CONCLUSION: It was observed that maximum electrical power is lower than maximum mechanical power at the wind speed of 10m/s, because as the wind speed increases, the current flows through the winding increases, which increases the power loss of the generator. So, the efficiency and electrical power decreases as the wind speed increases. The mechanical power is approximately proportional to the cube of the wind speed. Due to increase in power loss, the maximum electrical is not proportional to the cube of the wind speed.
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