MGVCL Exam Paper (30-07-2021 Shift 1)
A grid interactive solar system:

supplies power to as well as receives power from the grid as required
works only when the grid fails
always supplies power to the grid
always receives power from the grid

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MGVCL Exam Paper (30-07-2021 Shift 1)
The expression for voltage regulation of a short transmission line for lagging power factor is given by: ___, where, 'I' is the line current, 'V_r' is the receiving end voltage, 'R' is the line resistance and 'X' is the line reactance.

(IR cosφ_r - IX sinφ_r)/V_r
(IX cosφ_r + IR sinφ_r)/V_r
(IX cosφ_r - IR sinφ_r)/V_r
(IR cosφ_r + IX sinφ_r)/V_r

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MGVCL Exam Paper (30-07-2021 Shift 1)
___ is the short time reduction in the rms voltage between 0.1 to 0.9 p.u for a duration of ___

Voltage swell, 0.5 cycle to 1 minute.
Voltage swell, greater than 1 minute
Voltage sag, greater than 1 minute
Voltage sag, 0.5 cycle to 1 minute.

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