Browsing by Subject "Network"
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Item Improving the energy efficiency of a Power Distribution Network by Loss Reduction: A case study in rural 11 kV Feeder(I.O.E. Pulchowk Campus, 2023-11) Khatiwada, RoshanInherent losses occur when electrical energy travels from power generation facilities to end-users. Several utility companies do not recognize the benefits of modernizing their distribution systems or conducting assessments like load flow analysis to identify technical losses and performance indicators like voltage levels at customer service points. Consequently, these companies persist in running their networks without conducting any technical evaluations regarding energy losses or the quality of supply. The research objective is to improve the energy efficiency of a Power Distribution Network by Loss Reduction in a rural 11 kV Feeder of Nepal. Various reinforcement techniques for efficiency improvement such as: Conductor upgradation, Capacitor placement, Integration with Solar PV are studied. Combined methods of Conductor upgradation with Capacitor placement and Solar PV with Capacitor placement are also considered. Finally, a financial analysis is done.Item Optimal Network Reconfiguration and Distributed Generation Integration for Power Loss Minimization and Voltage Profile Enhancement in Radial Distribution System(I.O.E. Pulchowk Campus, 2022-09) Manandhar, NareshNetwork Reconfiguration with Distributed Generation (DG) integration can significantly reduce power loss and improve the system voltage. This thesis explores the approach for reduction in power loss and improvement in system voltage through a combination of network reconfiguration and DG installation in radial distribution systems. Initially, the approach was verified in a typical 33 and 69 Test Bus system in MATLAB using the Backward/Forward Propagation Load Flow approach. Voltage Stability Index (VSI) technique has been applied to determine the most sensitive bus to locate for DG integration. Artificial Bee Colony (ABC) algorithm was used to determine the optimal solution. Six scenarios for different combinations of system reconfiguration and DG installation were analyzed by using NEA 63-Bus real distribution network of the Nepal Electricity Authority (NEA), Kirtipur Distribution Center. The simulated results were compared with the base case scenario and were validated with results from the previous studies for DGs injecting active power only. Among them, Scenario VI (simultaneous network reconfiguration and DG integration) gave the best result for power loss reduction and voltage profile improvement. The results obtained in this study show that, for DGs generating active power only, the percentage reduction in active or real power has been improved by 72.19%, 83.52%, and 57.69% for the IEEE 33, IEEE 69, and NEA 63-Bus system respectively. Similarly, for DGs generating both real and reactive power, the power loss has been reduced by 91.61%, 96.53%, and 90.54% for the IEEE 33,Item Optimization of Firefighting capacity using Network Analysis: Case Study of Kathmandu Valley(I.O.E. Pulchowk Campus, 2022-09) Amatya, SiddarthaDespite the fact that fire is the most common and economically costly disaster, fire response and preparedness appear to be significantly limited, particularly in the Kathmandu valley. Only four operational fire stations, excluding army and aviation authorities, are presently responding to fire disasters in the valley. Due to this, it is impossible for these firefighters and fire brigades to arrive at the accident scene on time. As a result, people suffer bigger losses, including the danger of losing their lives, which not only stresses them out but also diminishes confidence of firefighting units due to the public's unwelcoming conduct upon their delayed arrival. This thesis studies about the current response time capacity of the fire station inside Kathmandu valley using service area of network analysis in QGIS software. Furthermore, the optimal number of locations for fire station is calculated using Allagash method using python programming. It is found that at least 56 number of fire station or fire truck at stand by position at several locations is required to serve population optimally inside Kathmandu Valley. However, more numbers of fire stations are required if international standard of 240 seconds of response time is followed. The number of stations required can be decreased if the speed of truck can be increased by improving condition of roads and road appurtenances.