1. ∂P/∂IVI
2. ∂P/∂δ
3. ∂P/∂f
4. ∂P/∂Q 6
∂P/∂δ
1. reactive power limit
2. short-circuit current limit
3. steady-state stability hunt
4. transient stability limit
transient stability limit
1. 400 MG
2. 420 MG
3. 444 MJ
4. 500MJ
444 MJ
1. 7.21
2. 8.48
3. 9.10
4. 4.39
8.48
1. 27.87 kV
2. 82.27 kV
3. 78.28 kV
4. none of these
27.87 kV
1. excitation control
2. phase shifting transformer
3. single pole switching of circuit breakers
4. increasing the turbine valve opening
single pole switching of circuit breakers
1. low cost of HVDC terminals
2. no harmonic problems
3. minimum line power losses
4. simple protection
no harmonic problems
1. increase efficiency of transmission
2. reduce power losses
3. increase power transfer capability
4. both (a) and (b)
increase power transfer capability
1. lagging reactive power and the inverter supplies leading, reactive power
2. leading reactive power, and the inverter supplies lagging reactive power
3. lagging reactive power and the inverter supplies lagging reactive power
4. leading reactive power and the inverter supplies leading reactive power
lagging reactive power and the inverter supplies leading, reactive power
1. 0.16
2. 0.01
3. 4.0
4. 0.25
4.0