High-voltage direct current (HVDC) is being contemplated for power transmission globally as it can be used to transmit power across oceans by using underwater cables with minimal loses unlike alternating current (AC). It also enables power transmission between unsynchronized AC transmission grids effectively. However, high cost and complexity hinder its adoption. At present the US, European Union, India, and China have developed and deployed HVDC links, and China is even preparing to deploy a UHVDC link. New developments in cable materials and manufacturing, synchronizing, filtering and component manufacturing are helping to bring the costs down.
Low-voltage direct current (LVDC) has received significant focus and attention of the global research community as it provides ample scope for generation and distribution of electricity through extensive usage of renewable energy resources. Moreover, developing countries have turned toward LVDC for providing additional electrical access to remote locations. This need for electricity access is driving establishment of a systems approach to standardization that can take LVDC well beyond individual devices.
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Keywords: HVDC, high voltage, direct current, HVDC links, inter-connector, power, transmission, China, UHVDC, low voltage direct current, LVDC, ultra high voltage direct current, cables, DC motor, Shade Motor, low voltage power