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3. Power station A delivers 640 MVA to its consumers at a power factor of 0.766 lagging. Power station B delivers 560 MVA to its consumers at a power factor of 0.7071 lagging. Two three-phase generating power stations A and B work at (86.077+j18.296) kV and (131.277+j13.798) kV respectively. The two power stations are inter- connected via a transmission line with an impedance of (6.59+j16.672) O/phase. The phase-regulator at power station A is adjusted such as to reduce the loading at power station A by 82 MW. Take machine A as leading machine. Use standard formulae to the following calculations • Determine the total active power delivered or received by Power station A (P:) in MW • Determine the total reactive power delivered or received by Power station A (Q.) in MVAR • Determine the total active power delivered or received by Power station B (Pi) in MW. • Determine the total reactive power delivered or received by Power station B (Qi) in MVAR • Determine the interconnector current (la) in kA in polar form • Use complex power to determine the final active power loadings on Power station A (Pa) in MW. • Use complex power to determine the final reactive power loadings (Qa) on Power station A in MVar Use complex power to determine the final active power loadings on Power station B (Pb) in MW. Use complex power to determine the final reactive power loadings (Qn) on Power station B in MVAr

3. Power station A delivers 640 MVA to its consumers at a power factor of 0.766 lagging. Power station B delivers 560 MVA to its consumers at a power factor of 0.7071 lagging. Two three-phase generating power stations A and B work at (86.077+j18.296) kV and (131.277+j13.798) kV respectively. The two power stations are inter- connected via a transmission line with an impedance of (6.59+j16.672) O/phase. The phase-regulator at power station A is adjusted such as to reduce the loading at power station A by 82 MW. Take machine A as leading machine. Use standard formulae to the following calculations • Determine the total active power delivered or received by Power station A (P:) in MW • Determine the total reactive power delivered or received by Power station A (Q.) in MVAR • Determine the total active power delivered or received by Power station B (Pi) in MW. • Determine the total reactive power delivered or received by Power station B (Qi) in MVAR • Determine the interconnector current (la) in kA in polar form • Use complex power to determine the final active power loadings on Power station A (Pa) in MW. • Use complex power to determine the final reactive power loadings (Qa) on Power station A in MVar Use complex power to determine the final active power loadings on Power station B (Pb) in MW. Use complex power to determine the final reactive power loadings (Qn) on Power station B in MVAr

Power System Analysis and Design (MindTap Course List)
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.43P: Three single-phase transformers, each rated 10MVA,66.4/12.5kV,60Hz, with an equivalent series...
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3. Power station A delivers 640 MVA to its consumers at a power factor of 0.766 lagging. Power station B delivers 560 MVA to its consumers at a power factor of 0.7071 lagging. Two three-phase generating power stations A and B work at (86.077+j18.296) kV and (131.277+j13.798) KV respectivelv The two power stations are inter- connected via a transmission line with an impedance of (6.59+j16.672) Olphase. The phase-regulator at_power station A is adjusted such as to reduce the loading at power station A by 82 MW. Take machine A as leading machine. Use standard formulae to the following calculations Determine the total active power delivered or received by Power station A (P:) in MW • Determine the total reactive power delivered or received by Power station A (Qi) in MVAR • Determine the total active power delivered or received by Power station B (Pi) in MW. • Determine the total reactive power delivered or received by Power station B (Q) in MVAR Determine the interconnector current (lj) in kA in polar form • Use complex power to determine the final active power loadings on Power station A (Pa) in MW. • Use complex power to determine the final reactive power loadings (Qa) on Power station A in MVar, • Use complex power to determine the final active power loadings on Power station B (Pb) in MW. Use complex power to determine the final reactive power loadings (Qh) on Power station B in MVA..
Transcribed Image Text:3. Power station A delivers 640 MVA to its consumers at a power factor of 0.766 lagging. Power station B delivers 560 MVA to its consumers at a power factor of 0.7071 lagging. Two three-phase generating power stations A and B work at (86.077+j18.296) kV and (131.277+j13.798) KV respectivelv The two power stations are inter- connected via a transmission line with an impedance of (6.59+j16.672) Olphase. The phase-regulator at_power station A is adjusted such as to reduce the loading at power station A by 82 MW. Take machine A as leading machine. Use standard formulae to the following calculations Determine the total active power delivered or received by Power station A (P:) in MW • Determine the total reactive power delivered or received by Power station A (Qi) in MVAR • Determine the total active power delivered or received by Power station B (Pi) in MW. • Determine the total reactive power delivered or received by Power station B (Q) in MVAR Determine the interconnector current (lj) in kA in polar form • Use complex power to determine the final active power loadings on Power station A (Pa) in MW. • Use complex power to determine the final reactive power loadings (Qa) on Power station A in MVar, • Use complex power to determine the final active power loadings on Power station B (Pb) in MW. Use complex power to determine the final reactive power loadings (Qh) on Power station B in MVA..
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