Hvdc Light Technology

Topics: High-voltage direct current, Electric power transmission, Alternating current Pages: 8 (2226 words) Published: January 17, 2013
HVDC Light Technology

R.Dinesh Babu

EEE Department,
Adhiparasakthi Engineering College
Melmaruvathur, Tamilnadu, India


Abstract---This document reveals theHVDC Light DC transmission technology.It is used in underground transmission and moreover provides point to point transmission.HVDC Light requires only two elements namely a converter station and a pair of ground cables. The new HVDC Light cable is an extruded, single-pole cable. It is ideally suited for feeding power into growing metropolitan areas from a suburban substation. HVDC Light is inherent environmentally friendly cables instead of OH transmission lines. Virtually no magnetic field. The environmental gains would be substantial, since the power supplied via the DC cables will be transmitted from efficient power plants in the main AC grid.


A hundred years ago, the transformer and a new transmission and distributionbe controlled precisely and independentlycan replace overhead lines at no costcontrol capabilities that are not present oreconomically feasible to connect smallscale,Equally important, HVDC Light hasfor inefficient, polluting local generationfrequency, active and reactive power canislands, mining districts and drillingloads from a main AC-gridof each other. This technology also relieson a new type of underground cable which penalty platforms can be supplied with power frompossible even in the most sophisticated ACrenewable power generation. Renewable power generation plantssuch as diesel units. The voltage, .

Connect small scale
Feeding remote isolated
Flexible transmission

System technology, HVDC Light, makes it the main grid,thereby eliminating the needto the main AC grid. Vice versa,using thevery same technology, remote locations asthe three phase system made it possible totransmit AC power efficiently and economically over vast distances and todistributethe power toamultitude ofusers.Since then all aspects of transmission anddistribution have developed by means oftechnical improvement and evolution. This AC transmission and distributiontechnology has made it possible to locategeneratingplants in optimum locations, andtoutilize them efficiently. This has alsoresulted in great environmental gains.Thermal plants have been located wherethey can be supplied with fuel through anefficient transportation system, therebyreducing waste and pollution. Hydro plantshave been located where the hydroresources can be used at the greatestadvantage. And large generating plantshave meant fewer overhead lines than amultitude of smaller generating plantswould have required.However, today’s AC transmission anddistribution systems are, at least inprinciple, based on ideas that haven’tchanged much since a hundred years ago. To transmit power, step up the voltage withtransformers, transmit power, step downthe voltage and distribute power. Despitetheir proven advantages, it is difficult andexpensive to adapt AC transmission anddistribution systems to the numerous smallscalegenerating plants that are being built,or to the increasingly complex and variableproduction and load demands.Environmental concerns and regulationsalso put heavy restrictions on building right-of-ways and on small-scale, fossilfuelledgenerating plants, such as dieselgenerating plants.These new trends require networks that areflexible. The networks must be able to copewith large variations in load and frequentchanges in productions patterns with tougher environmental regulations.Also, in such flexible networks, the powerflow and the voltages require precisecontrol in order to make the grids stable and economic.


As its name implies, HVDC Light is a DCtransmission technology. However, it isdifferent from the classic HVDCtechnology used in a large number oftransmission schemes. Classic HVDCtechnology is mostly used for large point-to-point transmissions, often over vastdistances across land or under water. It requires...
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