Inverter modelling techniques for protection studies

Wijnhoven, Thomas; Tant, Jeroen

doi:10.1109/pedg.2012.6253999

Cited by 10 publications

(10 citation statements)

References 25 publications

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“…In this mode the harmonics are considered to be totally eliminated; consequently, calculation complexity is dramatically reduced. From the perspective of power system dynamic study, the average model is sufficient to appropriately mimic the realistic VSC's AC fault response [10]. Therefore, in this paper, the time average model is selected to analyse of the VSC fault performance.…”

Section: ) Time Average Modelmentioning

confidence: 99%

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Development of models to study VSC response to AC system faults and the potential impact on network protection

Booth

Roscoe

et al. 2014

2014 49th International Universities Power Engineering Conference (UPEC)

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As the utilization of renewable energy sources (RES) and HVDC links is growing rapidly, many characteristics of the resulting power system can be seriously changed. HVDC links, as well as RES using converters as an interface with the main grid, can be all treated as non-synchronous sources. These sources are different from the traditional synchronous generators in many ways and bring significant challenges to the existing protection systems. Therefore, the aim of this paper is to explore power system protection performance issues under the context of the main characteristics of future power networks. In this paper the operating principles of converters is investigated. Initial equivalent models of Voltage Source Converters (VSC) in response to both symmetrical and unsymmetrical faults in the AC power systems are introduced and developed. Such models explain the characteristics of the future power networks with focuses on protection system performance. The VSC models will investigate system performance under fault conditions taking into account of European HVDC Grid Code requirements proposed by the European Network of Transmission System Operators for Electricity (ENTSO-E)[1]

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Section: ) Time Average Modelmentioning

confidence: 99%

“…Reference value of can be determined by the desired reference value of AC real power: (10) Or by the desired reference value of DC voltage: (11) The reference value of can be determined by the desired reference value of AC reactive power:…”

Section: Outer Control Loopmentioning

confidence: 99%

Development of models to study VSC response to AC system faults and the potential impact on network protection

Booth

Roscoe

et al. 2014

2014 49th International Universities Power Engineering Conference (UPEC)

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“…These techniques range from using full time domain modelling that is very accurate but computationally heavy to more simple methods that sacrifice some accuracy for speed [5]. Focus in this paper is put on the latter type.…”

Section: Introductionmentioning

confidence: 99%

Short circuit calculation in networks with a high share of inverter based distributed generation

Margossian

Sachau

2014

2014 IEEE 5th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

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Abstract-Conventional short circuit calculation programs do not consider the actual behavior of inverter based distributed generation (DG). Several techniques to consider them have been suggested in literature and are briefly described in this paper. A tool is developed with the combination of these techniques. The approach uses standard short circuit calculation tools and accommodates inverter based DG with different fault responses. The approach is evaluated and compared against other techniques using a realistic test distribution network model.

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“…Authors [1], [2], [3], [4], [5] all present different control diagrams with the common goal of simulating a constant power grid-connected IIDG. An accurate representation of the control scheme of an IIDG NOTICE: this is the authors' version of a work that was accepted for publication.…”

Section: Introductionmentioning

confidence: 99%

“…A single unified representation of the fault response for the short term transient of an IIDG unit is difficult as the thermal dynamics of the inverter must be accurately modelled in addition to the control and power dynamics of the IIDG and grid. The variety of fault current data gathered by [8] and the range of control schemes presented by authors [1], [2], [3], [4], [5] is testament to the impracticality of deriving a unified detailed model of short term transients. The FAT provides a means of approximating the fault response of IIDG for use in analysing DN line protection schemes without requiring an in-depth understanding of an IIDG unit's control structure.…”

Section: Introductionmentioning

confidence: 99%

Fault approximation tool for grid-connected inverter-interfaced distributed generators

Kennedy

Ciufo

Agalgaonkar

2014

2014 Australasian Universities Power Engineering Conference (AUPEC)

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A novel fault approximation tool (FAT) is presented for use in distribution networks with a high penetration of inverter-interfaced distributed generation. The FAT does not rely on balanced operation nor an absolute reference point for voltage calculations, both of which are required for Newton-Raphson load flow calculations. Simulations show that the FAT provides an accurate representation of the transient and steadystate fault response for unbalanced faults when juxtaposed with a detailed small-signal model. The `subtransient' response of the inverter-interfaced distributed generation is omitted to remove data considered extraneous from the perspective of distribution line protection analysis. The FAT is not appropriate for analysing the efficacy of distributed generation local protection and is inappropriate for islanded applications. The FAT is designed explicitly for the purpose of utility line protection design and analysis. Abstract-A novel fault approximation tool (FAT) is presented for use in distribution networks with a high penetration of inverter-interfaced distributed generation. The FAT does not rely on balanced operation nor an absolute reference point for voltage calculations, both of which are required for NewtonRaphson load flow calculations. Simulations show that the FAT provides an accurate representation of the transient and steadystate fault response for unbalanced faults when juxtaposed with a detailed small-signal model. The 'sub-transient' response of the inverter-interfaced distributed generation is omitted to remove data considered extraneous from the perspective of distribution line protection analysis. The FAT is not appropriate for analysing the efficacy of distributed generation local protection and is inappropriate for islanded applications. The FAT is designed explicitly for the purpose of utility line protection design and analysis.

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Inverter modelling techniques for protection studies

Cited by 10 publications

References 25 publications

Development of models to study VSC response to AC system faults and the potential impact on network protection

Development of models to study VSC response to AC system faults and the potential impact on network protection

Short circuit calculation in networks with a high share of inverter based distributed generation

Fault approximation tool for grid-connected inverter-interfaced distributed generators

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