2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per phase. The voltage of power station A is advanced with an angle of 10.5 degrees with respect to the voltage of power station B. The loading of power station B has a real power of 200 MW. The respective loads of the two power stations are as follows: Power station A: 165 MVA at a power factor of 0.819 lagging. Power station B: The reactive power consumed by the load is 155 Mvar. *Round off to two decimal places to every question 18.The final loading of power station B (MVA) and it's angle 19.The reactive power received by power station A if the reactive power loading from power station A is to be reduced by 30% (MVar). 20.The required advancement angle at power station A to achieve the 30% reduction in reactive power loading of power station A (degrees).
Load flow analysis
Load flow analysis is a study or numerical calculation of the power flow of power in steady-state conditions in any electrical system. It is used to determine the flow of power (real and reactive), voltage, or current in a system under any load conditions.
Nodal Matrix
The nodal matrix or simply known as admittance matrix, generally in engineering term it is called Y Matrix or Y bus, since it involve matrices so it is also referred as a n into n order matrix that represents a power system with n number of buses. It shows the buses' nodal admittance in a power system. The Y matrix is rather sparse in actual systems with thousands of buses. In the power system the transmission cables connect each bus to only a few other buses. Also the important data that one needs for have a power flow study is the Y Matrix.
Types of Buses
A bus is a type of system of communication that transfers data between the components inside a computer or between two or more computers. With multiple hardware connections, the earlier buses were parallel electrical wires but the term "bus" is now used for any type of physical arrangement which provides the same type of logical functions similar to the parallel electrical bus. Both parallel and bit connections are used by modern buses. They can be wired either electrical parallel or daisy chain topology or are connected by hubs which are switched same as in the case of Universal Serial Bus or USB.
2.1 Two power stations, A and B, are synchronized at 66 kV. They are inter-connected
by a transmission line with an inductive reactance of 6.7-Ω and resistance of 3.5-Ω per
phase. The voltage of power station A is advanced with an angle of 10.5 degrees with
respect to the voltage of power station B. The loading of power station B has a real
power of 200 MW. The respective loads of the two power stations are as follows:
Power station A: 165 MVA at a power factor of 0.819 lagging.
Power station B: The reactive power consumed by the load is 155 Mvar.
*Round off to two decimal places to every question
18.The final loading of power station B (MVA) and it's angle
19.The reactive power received by power station A if the reactive power loading
from power station A is to be reduced by 30% (MVar).
20.The required advancement angle at power station A to achieve the 30%
reduction in reactive power loading of power station A (degrees).
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