4. The de shunt generator is connected to a load that draws 28,800 watts, given the armature and shunt field resistance of 0.04 ohm and 48 ohms respectively. If the power delivered in the armature is 106.3% of the power delivered to the load. Calculate the generated e.m.f. of the generator. TRO has 25 M sexis street lighting
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.
Answer number 4
Make solution neatly and accurate
![1. A 500 V, 250 kW, long shunt compound generator induces an e.m.f. of 480 V when
running at 1000 r.p.m. no load. On full load the spped of the machine drops to 975
r.p.m. the flux increases by 15% and the terminal voltage rises to 500 V. If the
series and shunt field resistances are 0.02 ohm and 100 ohms respectively,
calculate the armature resistance. Assume a voltage drop of 1V per brush.
2. A 250 V shunt generator has a full load armature current of 40 A, under these
conditions the losses are: FW = 200 watts, shunt field = 100 watts, core = 260
watts, brush contact = 120 watts, armature copper = 400 watts. For operation at
maximum efficiency, when the constant losses are equal to those losses that vary
as the square of the load, calculate the maximum efficiency.
3. A series generator having a combined armature and field resistance of 0.4 ohm us
running at 1000 rpm and delivering 5.5 kW at a terminal voltage of 110 V. If the
speed is raised to 1500 rpm and load adjusted to 10 kW, find the new terminal
voltage. Assume the machine is working on straight line portion of magnetization
characteristics.
4. The dc shunt generator is connected to a load that draws 28,800 watts, given
the armature and shunt field resistance of 0.04 ohm and 48 ohms respectively.
If the power delivered in the armature is 106.3% of the power delivered to the
load. Calculate the generated e.m.f. of the generator.
5. URS Electrician has a 25 kW series generator used in street lighting has an
efficiency of 85 8 when operating at rated load. If the stray power loss is 20 %
of the full load loss, calculate the efficiency of the generator when delivering a
load of 15 kW, assuming that the stray power loss is substantially constant and
the other losses vary as the square of the load.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9c0d039d-edd9-453b-b7e3-db8354654c44%2F0633d241-623e-43b7-837f-bde53444b1af%2F1a0huv_processed.jpeg&w=3840&q=75)
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