Abstract
The ever increasing development and availability of power electronic systems is the underpinning technology that enables large scale integration of wind generation plants with the electricity grid. As the size and power capacity of the wind turbine continues to increase, so is the need to place these significantly large structures at off-shore locations. DC grids and associated power transmission technologies provide opportunities for cost reduction and electricity grid impact minimization as the bulk power is concentrated at single point of entry. As a result, planning, optimization and impact can be studied and carefully controlled minimizing the risk of the investment as well as power system stability issues. This paper discusses the key technologies associated with DC grids for offshore wind farm applications.
Highlights
Over the last twenty years, wind energy has become the fastest developing renewable energy technology [1]
With the development of wind turbine and power electronics technologies, large scale wind farms of hundreds of MWs of power are being developed in many countries around the world
Subsea power cables and DC circuit breakers (CBs) are a critical component of an high voltage direct current (HVDC) transmission system used in any offshore electrical power scheme [3,4]
Summary
Over the last twenty years, wind energy has become the fastest developing renewable energy technology [1]. New power electronic technologies must meet the technical requirements so that the large amounts of electricity generated by the wind can be injected into the grid at varying power level and from a range of wind farm locations [1]. DC technologies offer a number of advantages such as low power losses, no connection distance limitation, no resonance etc They have major disadvantages concerning control and switching actions. Subsea power cables and DC circuit breakers (CBs) are a critical component of an HVDC transmission system used in any offshore electrical power scheme [3,4]. The. Section discusses in detail the operation and control methods of large wind farms in case of electricity grid disturbances and faults.
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