Overview of short-circuit contribution of various Distributed Generators on the distribution network

Karaliolios, P.; Ishchenko, A.; Coster, EJ Edward; Myrzik, J.M.A.; Kling, W.L.

doi:10.1109/upec.2008.4651553

Cited by 19 publications

(14 citation statements)

References 7 publications

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“…Generator selection is critical here as certain generator types will contribute less fault current than others. In [22] fault currents for synchronous and asynchronous generators are given as 15 p.u. and 8 p.u.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Wave Farm Electrical Network Configurations

Sharkey¹,

Conlon²,

Gaughan³

2011

Linköping Electronic Conference Proceedings

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Wave Energy Converters (WECs) have been in development for a number of decades and some devices are now close to becoming a commercial reality. As such, pilot projects are being developed, particularly in the UK and Ireland, to deploy WECs on a pre-commercial array scale. There is little experience in the wave energy or utility industry of designing and installing electrical networks for WEC arrays with the closest comparison being offshore wind farms. There are some key features of WECs which will ultimately dictate that the electrical configuration differs from that of offshore wind farms. This paper investigates the potential representative electrical network configurations for small (10MW), medium (40MW) and large scale (150MW) 'wave farms' in order to establish a development path for such projects. The configurations are evaluated for efficiency (power loss), redundancy and short circuit levels. Key interfaces in the electrical infrastructure are identified and discussed. This paper also identifies the key differences between offshore wind farm electrical networks.

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Section: Methodsmentioning

confidence: 99%

Investigation of Wave Farm Electrical Network Configurations

Sharkey¹,

Conlon²,

Gaughan³

2011

Linköping Electronic Conference Proceedings

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“…According to analyses in various studies [9][10][11][12], it was assumed that the fault current contribution of the DFIG-WT is dictated only by its electrical parameters. Yet, this would be true if only the crowbar protection circuit was engaged directly…”

Section: Fault Current Contribution Analysismentioning

confidence: 99%

Standard Calculation of Fault Current Contribution of Doubly Fed Induction Generator-Based Wind Turbine

El-Naggar¹

2016

Wind Turbines - Design, Control and Applications

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The fault current contribution of the doubly fed induction generator-based wind turbines (DFIG-WTs) is dictated by a combination of factors, including the electrical parameters of the machine and the controller configuration of the converters. A detailed manufacturerbased simulation model for DFIG-WT was used for detailed analysis of the controller influences on short-circuit parameters. Based on the analysis, new approximate expressions of the short-circuit parameters were introduced and a new mathematical model of the short-circuit current were developed. The mathematical models and the expressions were later validated using nonlinear optimization for parameter extraction. Subsequently, a new method was introduced for fault current contribution calculation in a simple and reliable way similar to IEC-60909. The method is based on linearization and a newly introduced correction factor that takes the influence of the controller into account. Finally, the new introduced method was tested on a small wind farm and the results show better accuracy in comparison with IEC-60909.

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“…The effect of crowbar protection in the enhancement of the stability as well as the fault ride-through capability of the generator has been discussed extensively in [7]. In [8] it is also shown that it affects the S/C contribution of the generator; therefore, it is also incorporated in the model used for the simulations presented in this paper.…”

Section: Dfig Modelmentioning

confidence: 99%

The effect of Fault Ride-Through requirements on voltage dips and post-fault voltage recovery in a Dutch Distribution Network

Karaliolios¹,

Coster²,

Slootweg³

et al. 2010

REPQJ

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Abstract. In this paper the possibility to use Decentralized Generation (DG) units for voltage support in Distribution Networks during and after a Short Circuit (S/C) event is discussed. Two types of DG units will be examined, Combined Heat-Power (CHP) plants and Doubly-Fed Induction Generators (DFIG). Earlier approaches would oblige the disconnection of these units during grid disturbances, in order to avoid unwanted conditions such as interference with the protection system and islanding [1]. Newer grid codes for Transmission Networks like [2], taking into consideration the increased share of these units in energy production have set specific Fault Ride-Through (FRT) criteria which oblige them to stay connected during SC events when they are combined to large plants directly connected to the transmission grid, such as (off shore) wind farms.. If ever more DG is connected directly to distribution grids, the same reasoning leading to applying rault ride through criteria to DG connected in large groups to transmission grids, may be applied to DG connected to distribution grids, as a loss of a a large amount of DG connected to distribution grids has the same adverse effect as using DG connected directly to the transmission grid.In order to examine the effects of applying FRT criteria to DG connected to the distribution grid, simulations with a detailed modeled network for different types of outages were carried out. In the simulations, the application of FRT criteria currently only used for DG connected to the transmission grid is discussed. From the specific test case, which corresponds to a strong network with extended cable connections and locally high penetration level of DG in distribution system it was shown that application of strict fault ride-through criteria combined with active voltage support is not necessary in case of DG connected to distribution networks.

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Overview of short-circuit contribution of various Distributed Generators on the distribution network

Cited by 19 publications

References 7 publications

Investigation of Wave Farm Electrical Network Configurations

Investigation of Wave Farm Electrical Network Configurations

Standard Calculation of Fault Current Contribution of Doubly Fed Induction Generator-Based Wind Turbine

The effect of Fault Ride-Through requirements on voltage dips and post-fault voltage recovery in a Dutch Distribution Network

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