-
The Economic and Social Determinance of Electrification Rate; Empirical Evidence from Sudan
Arwa Ibrahim
The objective of this study is to investigate the relationship between electrification rate as the dependent variable and natural resources rent, general government final consumption expenditure, GDP, GDP per capita, population growth, and power consumption in Sudan for the period between 1990-2014. The aim of the study is to explore factors that are impacting Sudan’s total electricity access. A quantitative method using the Ordinary Least Square (OLS) Regression analysis testing approach was applied to study the significance of the relationship between the dependent and independent variables. The results revealed that there is an insignificant relationship between the variables in the study. The study is indicating that variables outside the scope of the study are probably impacting the electrification rate in Sudan.
-
Study of Transient Stability of the Grid System under a Fault Condition with Utility-Scale Solar Photovoltaic (PV) Interconnection using Switched Capacitor Banks for Voltage Recovery
Shaibu Ibrahim
Transient stability is the capability of the electric grid to return to normal operating or equilibrium conditions after a fault is cleared. Voltage collapses at the fault location and fluctuates (dips) at other points in the event of a disturbance in an electric system. The system must recover the voltages at all buses in the shortest possible time to remain in synchronism with the entire grid. Integrating solar photovoltaic (PV) generation into the electric grid comes with interoperability challenges such as maintaining bus voltages, angles, and frequency stabilities within their nominal operating range. A balanced and stable electric grid is essential to reliably integrate large solar PV power plants into an electric network. In this study, a proposed 85 MW solar PV plant is modeled to replace the generator at bus 3 of the IEEE-9 bus system for the investigation of the transient stability of the grid. Two cases were established after a power flow study was completed to set as the base of this investigation. In case 1, a three-phase fault was simulated at 1.0 seconds on a high-voltage bus 9 while capacitor banks located on load buses (5, 6, and 8) remained unswitched after the disturbance was cleared 0.7 seconds later. The system failed to achieve stability for the entire simulated period of 60 seconds. Six scenarios performed under test case 2 considering different capacitor bank sizes and installation configurations. Switched capacitor banks among the six scenarios investigated recovered the point of interconnection (POI) bus voltage, angle, and frequency for approximately 70.5% of stability duration for the simulated period. The results obtained demonstrate that switched capacitor bank(s) at a suitable location(s) in an electric grid is capable of supporting voltage recovery after a system disturbance.
This page collects non-thesis Sustainability Program student papers.
Printing is not supported at the primary Gallery Thumbnail page. Please first navigate to a specific Image before printing.