QUESTION THREE Asmall part of a power systems is shown in the single-line diagram in Figure 1. Grid Transformer 1 ⒸHot 180 MVA 330/132 kV X=8% 330 kV X =100 Overhead transmission line 100 km long x = 0.05 02/km Transformer 2 tot 150 MVA 132/11 kV X=5% Figure 1 Part of a power system Load (112+j84) MVA (a) Briefly explain why over-head transmission lines are used for long distance transmission of electricity instead of underground cables. (b) What type of support would you recommend for the overhead transmission line in Figure 1? Briefly describe this type of support, clearly stating why you think it is the most suitable support for the overhead line in Figure 1. (e) Calculate the load voltage if the grid voltage is 330 kV. (c) Calculate all the impedances in the power system in per-unit using a common base power of 200 MVA. (d) Sketch an impedance diagram of the power system and calculate the total impedance between the source and the load in per-unit
Short Transmission Line
A short transmission line is a transmission line that has a length less than 80 kilometers, an operating voltage level of less than 20 kV, and zero capacitance effect.
Power Flow Analysis
Power flow analysis is a topic in power engineering. It is the flow of electric power in a system. The power flow analysis is preliminary used for the various components of Alternating Current (AC) power, such as the voltage, current, real power, reactive power, and voltage angles under given load conditions and is often known as a load flow study or load flow analysis.
Complex Form
A power system is defined as the connection or network of the various components that convert the non-electrical energy into the electric form and supply the electric form of energy from the source to the load. The power system is an important parameter in power engineering and the electrical engineering profession. The powers in the power system are primarily categorized into two types- active power and reactive power.
Please answer part b,c ,d and e
Step by step
Solved in 6 steps with 3 images
