EPE Association: EPE 2011 - LS3b: Topic 16: HVDC Transmission

EPE 2011 - LS3b: Topic 16: HVDC Transmission
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 16: Power electronics in transmission and distribution > EPE 2011 - LS3b: Topic 16: HVDC Transmission

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   Comparison of Direct Voltage Control Methods of Multi-Terminal DC (MTDC) Networks through Modular Dynamic Models
By Rodrigo TEIXEIRA PINTO, Silvio FRAGOSO RODRIGUES, Pavol BAUER, Jan PIERIK [View]
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Abstract: Estimates are that circa 40GW of offshore wind power capacity is going to be installed throughoutEurope by the end of this decade. In this scenario, a pan-European offshore grid network is needed inorder to efficiently integrate large amounts of offshore wind into the different European countries’transmission networks. In this paper, the dynamic model of multi-terminal HVDC (MTDC)transmission system composed of voltage-source converters is presented. Afterwards, the dynamicmodels are used to compare four different methods for controlling the DC voltage inside MTDCnetworks, viz.: droop control, ratio control, priority control and voltage margin control. Lastly, a casestudy is performed in a four-node MTDC network and the different control strategies are compared.

   Operation and control of VSC-HVDC multiterminal grids for offshore wind
By Agusti EGEA-ALVAREZ, Adria JUNYENT-FERRE, Oriol GOMIS-BELLMUNT, Jun LIANG, Janaka EKANAYAKE, Nicholas JENKINS [View]
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Abstract: The control and operation of a multiterminal VSC-HVDC grid for offshore wind power under normaland fault conditions are described. The paper addresses maintaining the DC voltage during electricalfaults and power reduction methods using fixed speed induction generators.

   Prospects and Challenges of Future HVDC SuperGrids with Modular Multilevel Converters
By Noman AHMED, Arif HAIDER, Dirk VAN HERTEM, Lidong ZHANG, Hans-Peter NEE [View]
[Download]

Abstract: In order to transmit massive amounts of power generated by remotely located power plants, especially offshore wind farms, and to balance the intermittent nature of renewable energy sources, the need for a stronger high voltage transmission grid is anticipated. Due to limitations in AC power transmission the most likable choice for such a grid is a high voltage DC (HVDC) grid. However, the concept of the HVDC grid is still under active development as different technical challenges exist, and it is not yet possible to construct such a DC grid. This paper deals with prospects and technical challenges for the future HVDC SuperGrids. Different topologies for a SuperGrid and the possibility to use modular multilevel converters (M2Cs) are presented. A comprehensive overview of different sub-module implementations of M2C is given. An overview of short circuit behaviour of the M2C is also given, as well as a discussion on the choice between cables or overhead lines and DC-side resonance issues.

EPE 2011 - LS3b: Topic 16: HVDC Transmission
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 16: Power electronics in transmission and distribution > EPE 2011 - LS3b: Topic 16: HVDC Transmission
	[return to parent folder]

	Comparison of Direct Voltage Control Methods of Multi-Terminal DC (MTDC) Networks through Modular Dynamic Models By Rodrigo TEIXEIRA PINTO, Silvio FRAGOSO RODRIGUES, Pavol BAUER, Jan PIERIK	[View] [Download]
Abstract: Estimates are that circa 40GW of offshore wind power capacity is going to be installed throughoutEurope by the end of this decade. In this scenario, a pan-European offshore grid network is needed inorder to efficiently integrate large amounts of offshore wind into the different European countries’transmission networks. In this paper, the dynamic model of multi-terminal HVDC (MTDC)transmission system composed of voltage-source converters is presented. Afterwards, the dynamicmodels are used to compare four different methods for controlling the DC voltage inside MTDCnetworks, viz.: droop control, ratio control, priority control and voltage margin control. Lastly, a casestudy is performed in a four-node MTDC network and the different control strategies are compared.

	Operation and control of VSC-HVDC multiterminal grids for offshore wind By Agusti EGEA-ALVAREZ, Adria JUNYENT-FERRE, Oriol GOMIS-BELLMUNT, Jun LIANG, Janaka EKANAYAKE, Nicholas JENKINS	[View] [Download]
Abstract: The control and operation of a multiterminal VSC-HVDC grid for offshore wind power under normaland fault conditions are described. The paper addresses maintaining the DC voltage during electricalfaults and power reduction methods using fixed speed induction generators.

	Prospects and Challenges of Future HVDC SuperGrids with Modular Multilevel Converters By Noman AHMED, Arif HAIDER, Dirk VAN HERTEM, Lidong ZHANG, Hans-Peter NEE	[View] [Download]
Abstract: In order to transmit massive amounts of power generated by remotely located power plants, especially offshore wind farms, and to balance the intermittent nature of renewable energy sources, the need for a stronger high voltage transmission grid is anticipated. Due to limitations in AC power transmission the most likable choice for such a grid is a high voltage DC (HVDC) grid. However, the concept of the HVDC grid is still under active development as different technical challenges exist, and it is not yet possible to construct such a DC grid. This paper deals with prospects and technical challenges for the future HVDC SuperGrids. Different topologies for a SuperGrid and the possibility to use modular multilevel converters (M2Cs) are presented. A comprehensive overview of different sub-module implementations of M2C is given. An overview of short circuit behaviour of the M2C is also given, as well as a discussion on the choice between cables or overhead lines and DC-side resonance issues.