Power Systems Frequencies must be same in which of the following line to exchange the power from one place to other place ? both 1 and 2 Synchronous line Asynchronous line No need of same frequency for exchange of power both 1 and 2 Synchronous line Asynchronous line No need of same frequency for exchange of power ANSWER DOWNLOAD EXAMIANS APP
Power Systems A lossless power system has to serve a load of 250 MW. There are two generators(G1 and G2) in the system with cost curves C1 and C2 respectively defined as follows: C1 = PG1+0.055P²G1 C2 = 3 PG2 + 0.03 P²G2 Where PG1 and PG2 are the MW injections from generators G1 and G2 respectively. Thus, the minimum cost dispatch will be PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW PG1 = 100 MW and PG2 = 150 MW PG1 = 0 MW and PG2 = 250 MW PG1 = 250 MW and PG2 = 0 MW PG1 = 150 MW and PG2 = 100 MW ANSWER DOWNLOAD EXAMIANS APP
Power Systems Power system network has a total power of 5000 MW at 50 Hz supplying to the different consumers. Frequency is varying at 1.5% per change of 2% load. Assume R =0.004 Hz/MW. Find the steady state frequency deviation if a sudden loss of 200 MW occur due to tripping of one of the transmission line? 0.52 Hz 0.48 Hz 50 Hz -0.52 Hz 0.52 Hz 0.48 Hz 50 Hz -0.52 Hz ANSWER DOWNLOAD EXAMIANS APP
Power Systems The ground capacitance existing between transmission line and ground is 4µF. Find the inductive reactance of the peterson coil for compensation of arcing grounds? 625.35 Ω 0.844 Ω 855.26 Ω 265.25 Ω 625.35 Ω 0.844 Ω 855.26 Ω 265.25 Ω ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following methods is/are used for reactive or voltage compensation All of these series capacitor shunt capacitor generation excitation control All of these series capacitor shunt capacitor generation excitation control ANSWER DOWNLOAD EXAMIANS APP
Power Systems Which of the following statements is/are true? Corona is reduced by increasing the distance between the conductor decreasing the supply frequency All of these increasing the radius of the conductor increasing the distance between the conductor decreasing the supply frequency All of these increasing the radius of the conductor ANSWER DOWNLOAD EXAMIANS APP
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