Design, Analysis and Implementation of Laboratory Scale VSC based HVDC System

Abstract

n alternative method of power transmission from one location to the other location is High Voltage Direct Current (HVDC) which is facilitated with inherent advancement over AC transmission. Effective power transmission is highly dependent on the converter used in transforming the current from one end to another i.e., AC to DC and vice versa. Matured design of converters can reduce harmonics, increase power transfer capabilities and reliability in that it offers high tolerance to a fault. With advancements in semiconductors and controllers, Voltage Source Converter (VSC) based HVDC has become an area of research. The number of advantages is highlighted with uses of VSC HVDC and Pulse Width Modulation (PWM), such as independent control of active and reactive power, VSC HVDC have inherent immunity against DC side current fault, such system can have ability to deliver passive load and possess black start capability etc. Moreover, converters and associate control strategies play a vital role in converting and power transmitting of HVDC system. The main contribution of this work is to carry out the appropriate type of VSC HVDC based on the specific application. This work highlights the number of factors, challenges, issues linked with VSC HVDC followed by possible solutions. This project work described the behaviour and analysis of VSC HVDC. Different scenarios were chosen, and the responses to each of the situations were analysed in detail. System simulation model analysis is performed on MATLAB/Simulink software. The grid voltages currents are in phase and the THD is under limit as per IEEE Standard 519-2014.