With increasing population and economic activity, the demand for electricity is bound to increase. Generally, the points of power consumption tend to be cities and adjoining industrial areas, but, the generation resources are located in remote areas, with long distances separating them. In order to haul large amounts of power over such long distances requires use of high voltage dc systems. Though, power distribution in its early days was using direct current technology, eventually, it got relegated to a niche. In this talk, we present about some developments pertaining to HVDC grids and wind farms. An overlay of HVDC grid on the existing power infrastructure and its benefits are discussed. A proposal of DC wind turbine for application to offshore wind farms is also presented. Some of the operational challenges and a proposal to overcome these is presented.
Himanshu Bahirat is an Assistant Professor in the Department of Electrical Engineering at IIT Bombay. His primary research interests are HVDC transmission, switching transients in power systems, circuit breakers and wind farms.