EPE Association: EPE 2007 - Subtopic 14-1

EPE 2007 - Subtopic 14-1 - LS: HVDC
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 14: 'Transmission and distribution of electrical energy' > EPE 2007 - Subtopic 14-1 - LS: HVDC

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   A New FACTS Component - Distributed Power Flow Controller (DPFC)
By DE HAAN Sjoerd W.H.; YUAN Zhihui; FERREIRA Braham [View]
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Abstract: This paper presents a new concept for power flow control by distributed UPFC. The system, called distributed power flow controller (DPFC), consists of several low-power series converters and one shunt large-power converter without common dc link. Also new is that the power exchange between the shunt and series parts is through the existing transmission line at a harmonic frequency. This solution enables the DPFC to fully control all power system parameters, and it reduces the cost and increases the reliability of device at the same time.

   Grid Frequency Control Design for Offshore Wind Farms with Naturally Commutated HVDC Link Connection
By RISHENG Li; SERGEY Bozhko [View]
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Abstract: This paper considers the formal design for the grid frequency control in an offshore wind farm connected with LCC HVDC link. The control paradigm is based on using the grid frequency control to regulate the HVDC rectifier firing angle or DC-link current and hence control the power flow in the system. The dynamic behaviors of the system are verified by comparing the response from derived transfer functions and PSCAD simulations; hence the grid frequency controllers are designed. Good modeling agreement is obtained for both open and closed loop systems and the work provides a good basis for wider research investigation into wind farm operation including fault behavior.

   WINDFACT Â®, a solution for the grid code compliance of the windfarms in operation
By GONZALEZ Fernando; MOLINA S.; CONTRERAS Angel; MENDOZA Javier; BUNEZ Julian; VISIERS Manuel; AGUDO Andres; AMARIS Hortensia [View]
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Abstract: When a voltage dip takes place on the grid, many of the windturbines installed in old windfarms switch of, thus jeopardizing the stability of the system. In order to comply with new grid code regulations which demand, amongst other things, the uninterrupted functioning of wind turbines when a grid failure occurs, thousands of wind turbines should be retrofitted or replaced in Spain. With a view to solving this problem, GAMESA has developed a specific power electronic based solution, making unnecessary both wind turbine retrofit or replacement. This paper presents the WINDFACT Â® solution, and testing results from a full scale prototype built for a 25 MW windfarm.

EPE 2007 - Subtopic 14-1 - LS: HVDC
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 14: 'Transmission and distribution of electrical energy' > EPE 2007 - Subtopic 14-1 - LS: HVDC
	[return to parent folder]

	A New FACTS Component - Distributed Power Flow Controller (DPFC) By DE HAAN Sjoerd W.H.; YUAN Zhihui; FERREIRA Braham	[View] [Download]
Abstract: This paper presents a new concept for power flow control by distributed UPFC. The system, called distributed power flow controller (DPFC), consists of several low-power series converters and one shunt large-power converter without common dc link. Also new is that the power exchange between the shunt and series parts is through the existing transmission line at a harmonic frequency. This solution enables the DPFC to fully control all power system parameters, and it reduces the cost and increases the reliability of device at the same time.

	Grid Frequency Control Design for Offshore Wind Farms with Naturally Commutated HVDC Link Connection By RISHENG Li; SERGEY Bozhko	[View] [Download]
Abstract: This paper considers the formal design for the grid frequency control in an offshore wind farm connected with LCC HVDC link. The control paradigm is based on using the grid frequency control to regulate the HVDC rectifier firing angle or DC-link current and hence control the power flow in the system. The dynamic behaviors of the system are verified by comparing the response from derived transfer functions and PSCAD simulations; hence the grid frequency controllers are designed. Good modeling agreement is obtained for both open and closed loop systems and the work provides a good basis for wider research investigation into wind farm operation including fault behavior.

	WINDFACT Â®, a solution for the grid code compliance of the windfarms in operation By GONZALEZ Fernando; MOLINA S.; CONTRERAS Angel; MENDOZA Javier; BUNEZ Julian; VISIERS Manuel; AGUDO Andres; AMARIS Hortensia	[View] [Download]
Abstract: When a voltage dip takes place on the grid, many of the windturbines installed in old windfarms switch of, thus jeopardizing the stability of the system. In order to comply with new grid code regulations which demand, amongst other things, the uninterrupted functioning of wind turbines when a grid failure occurs, thousands of wind turbines should be retrofitted or replaced in Spain. With a view to solving this problem, GAMESA has developed a specific power electronic based solution, making unnecessary both wind turbine retrofit or replacement. This paper presents the WINDFACT Â® solution, and testing results from a full scale prototype built for a 25 MW windfarm.