http://localhost:8080/xmlui/handle/123456789/7189 Sun, 12 Apr 2026 03:42:21 GMT 2026-04-12T03:42:21Z http://localhost:8080/xmlui/handle/123456789/7237 Comparative analysis of Protection scheme for HVDC converter against DC side fault PATEL, ATISH J. In this project, a protection scheme for HVDC converters (classical VSCs as well as MMCs) against dc-side faults is contemplated. The contemplated scheme provides complete segregation between the ac side and the HVDC converters during dc faults which allow the dc-link current to freely decay to zero (the grid current contribution into the dc fault is eliminated). This posses combining and connecting the double thyristor switches a cross the ac output terminals of the HVDC converter. The contemplated protection scheme provides advantages, such as lower dv/dt stresses and lower voltage rating of thyristor switches in accumulation to providing full segregation between the converter semiconductor devices and ac grid during dc-side faults. A simulation case study has been carried out to reveals the effectiveness of the contemplated scheme. For Full Thesis Kindly Contact to Respective Library Sat, 01 Oct 2016 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/7237 2016-10-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/7191 Influence Of Transformer Tap Changer On Voltage Stability GOHIL, SNEHALBA BHARATSINH Electricity market activities and a growing demand for electricity have led to heavily stressed power system. This requires operation of the network closer to their stability limits .Power system operation of the network closer to stability related problems, leading to unpredictable system behavior. Voltage stability refers to the ability of the system to sustain appropriate voltage levels through large and small disturbances. Steady state voltage stability is concerned with limits on the existence of steady state operating points for network. Facts devices can be utilized to increase the transmission capacity, the stability margin and dynamic behavior or serve to ensure improved power quality. The main capabilities are reactive power compensation, voltage control and power flow control. The proposed work is done with on load tap changer, as tap changer is one of the devices used to control the voltage. The algorithm is developed for voltage level control with on load tap changer operation. Normally the tap changer operation is done manually nowadays but the main purpose of this work is to show the effect of tap changing on voltage stability. For Full Thesis Kindly contact to respective Library Thu, 01 Dec 2016 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/7191 2016-12-01T00:00:00Z