Lab Report 1.pdf

Ital outputs of each data acquisition g control

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ital outputs of each Data Acquisition g control inputs of the power thyristor mo 1 Figure1. Circuit Diagram of SVC 1 ition and S2 to 3 in series with n and Control odule, using the
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, 8. In LVDAC-EMS software, open the SVC Control window and make the following settings: a. Function parameter to Static Var Compensator b. Control Type parameter to Manual Control c. Firing Angle Control parameter of Bridge 1 to Knob. d. Firing Angle parameter of TCR to 0° e. TSC1 parameter to Switched Out 9. Started the Static Var Compensator by clicking the start/stop button 10.In LVDAC-EMS software, opened the metering window and open the Acquisition Settings and set the sampling window to 8 cycles. 11.In the metering window, set three meters to measure the rms of the fundamental and harmonic component in the current I svc (I1). Set a meter to measure the three phase reactive power Q svc (PQS1 [E, I1]3~). 4. PROCEDURE: TCR Operation: 12.Turn on the power supply 13.In the SVC control window, set the TCR firing angle to 0°, so that rms value of the fundamental component of the current is maximal Current = 0.313A Reactive power = 45.5var TCR reactive power rating (each reactor) = 31var Line Voltage E1 (V) Line Current I1(A) Reactive Power PQS1(Var) Firing angle of Thyristor 228.4 0.313 45.5 0 289 0.371 42.2 45 228.8 0.159 28.02 90 266 0.233 0.593 180 Data 1. Varying the firing angle of thyristor
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, 14.Set the firing angle of TCR to 90° and opened the oscilloscope and observed the waveform of the current flowing in the TCR. Increase the firing angle of the thyristor slowly to 180° and displayed the current flowing in the thyristor. 15. From the below waveform oscilloscope 1 and 2, it was observed that the firing angle of the thyristor from 0° to 90°, the thyristor current was constant and maximum and lags the voltage ,which was due to inductance of the load. From 90° to 180°, current flowing in the thyristor got chopped. Oscilloscope 1. The Firing angle of thyristor at 90°
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, Oscilloscope 2. Firing angle of thyristor at 180° 16.Opened the harmonic analyser and displayed the harmonic component of the current I svc (I1) flowing in the Static Var Compensator (SVC). Harmonic Analyzer 1. For the firing angle 0°
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, 17. Increased the firing angle of the thyristor to 180° and observed the magnitude of the harmonic component in the current flowing in the thyristor. The magnitude of the harmonic component was low for the firing angle to 90°, which was due to the current flowing in the thyristor, was sine wave and maximum . Whereas firing angle from 90° to 180° , magnitude of the harmonic component was high, which was due to the current flowing in the thyristor, was chopped as firing angle increases. Harmonic component varies to the firing angle of the thyristor. 18.Opened the Data Table window and recorded the fundamental, 5 th harmonic component and 7 th harmonic component of the current flowing in the thyristor, firing angle and reactive power for the firing angle 0° to 180° in steps of 5°.
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