Vol: 1 Issue: 1
MODELING AND EVALUATION OF CALABAR TRANSMISSION LINE NETWORK FOR LOAD FLOW AND TRANSIENT STABILITY ANALYSIS FOR FUTURE GRID EXPANSION
Asuquo Eke Gertrude Fischer, Akpama E.J
1. INTRODUCTION
The power system is divided into three stages: generation, transmission, and distribution. In terms of generation, synchronous generators are used more frequently. The voltage level is then changed by transformers before transmission to decrease currents in the line and thus power losses. Transformers step down voltages for distribution purposes. [1,2,7,9]. Because the system is designed to deliver a constant and consistent power source. However, inevitable events like as lightning and human/animal accidents do occur, resulting in faults of varying magnitude. Generator disturbance produces system in-balance in both generation and distribution due to network problems. However, if these flaws are not corrected within a short period of time, they cause equipment deterioration, which leads to instability. This can be avoided by installing protective equipment in the network for the perfect scheme, which will prevent the spread of fault energy to the rest of the network. Some protective mechanism installations are required for an effective protection system. It is necessary to implement a mechanism. These can be avoided by installing protective equipment in the network for the perfect scheme, which will prevent the spread of fault energy to the rest of the network. Some protective mechanism installations are required for an effective protection system. [3, 4, 5,10] The occurrence of a failure can generates network instability, which can cause a computer to lose synchronism. A load flow analysis is required to assess the power system's transient stability. If the system cannot be sustained until the fault is resolved. The fault then destabilizes the entire system. Demonstrate how transient and load flow can affect the network and how they can be cleared by limiting their impact on the network. Because stability aids in the system's continual generation and transfer. Direct approaches determine stability without having to solve the system differential equations in detail. [3, 11, 14] The early work of Magnusson and Aylett, who employed the energy function to reach stability, sparked substantial interest in this method. The transient energy technique was then represented using a ball rolling on the inner surface of a cylinder formed by the equation describing the system's transient energy, as shown in. The region of stability is represented by the area inside the bowl, while the region of instability is represented by the area outside. The bowl rim symbolizes the highest elevation and thus the most potential energy for the transverse projection induced by the fault energy. A well-established method for evaluating synchronous machine transient performance and control techniques is mathematical modelling of synchronous machines. [12, 13, 18].