Operation and Dynamics of VSC- HVDC transmission system

Indian Power System is growing with a rapid pace. In recent years, there has been huge planning for development and deployment of renewable energy resources to meet the ever increasing electric power demand and to limit the use of fossil fuels. Wind generation poses grid integration challenge such as long distance under sea transmission and managing the variability of wind power variation on in the power grid. These challenges can be properly met by the use of VSC HVDC Transmission. VSC HVDC is rapidly growing due to selective advantages versus the conventional HVDC; independent control of active & reactive power and reliable operation with a weak (or) even passive system, including black start. This work deals with the modelling of Voltage Source Converter High Voltage Direct Current (VSC HVDC) systems for power system analysis. Proposed VSC HVDC model can be used for power flow and dynamic analysis. Control systems, DC circuit and converter transformers are part of the dynamic model. For demonstrating the ability of VSC HVDC in regulating and improving stability of power grid, simulation of Indian power system with VSC based HVDC is envisaged. From simulation, list of controls are discussed in detail for easy understanding.