The one-line diagram of a three-phase system is shown in Figure 1. By selecting a common based of 100 MVA and 32.75 kV on the generator bus, Motor 90 MVA 90 MVA 33/275 kV Xrp12% 55 MVA 10.95 kv 275/11kV Xry=12% Generator 95 MVA (G 32.75 kV 2x OH Line 138 km Load R=0.01 ohm/km 35 MVA X = 0 05 chm/km 10.95 kV 0.88 pf lagging Figure 1 (b) If the motor operates at full load 0.9 power factor lagging at a terminal voltage 10.95 kV, determine the voltage at the generator bus bar. Please enter your answer in the blank's: Voltage at load bus, VLoad= Motor apparent power, SM= Current drawn by the motor, Im= Current drawn by the load, ILoad= Total current drawn by load bus, IT= Equivalent series impedance, ZT = Voltage at generator busbar V, =
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.
Step by step
Solved in 3 steps with 3 images