Dynamic REI equivalents for short circuit and transient stability analyses

Milano, Federico; Srivastava, K. N.

doi:10.1016/j.epsr.2008.11.007

Cited by 68 publications

(32 citation statements)

References 40 publications

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“…Steady state model synthesis of power system has been investigated in the past [5][6][7][8], mainly focusing on transmission systems where distribution networks represented by pure loads. The synthesized models, including only positive sequence networks, may not be used to represent unbalanced systems such as distribution networks.…”

Section: B Literature Reviewmentioning

confidence: 99%

Real-time reduced steady state model synthesis of active distribution networks using PMU measurements

Mahmood

Hooshyar

Lavenius

et al. 2017

2017 IEEE Manchester PowerTech

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Real-time reduced steady state model synthesis of active distribution networks using PMU measurements. IEEE Transactions on Power DeliveryAccess to the published version may require subscription. N.B. When citing this work, cite the original published paper. Permanent link to this version:http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192943 1  Abstract--Due to the increase of generation sources in distribution networks, it is becoming more and more complex to develop and maintain models of these networks. Network operators need to determine reduced models of distribution networks to be used in grid management functions. This paper presents a novel method that synthesizes steady state models of unbalanced active distribution networks by the use of dynamic measurements (time series) from PMUs. As PMU measurements may contain errors and bad data, the paper presents the application of a Kalman Filter technique for real-time data processing. In addition, PMU data captures the power system's response at different time-scales, which are generated by different types of power system events; the presented Kalman Filter has been improved to extract the steady state component of the PMU measurements to be fed to the steady state model synthesis application. Performance of the proposed methods has been assessed by real-time hardware-in-the-loop simulations on a sample distribution network.Index Terms-active distribution network, Kalman Filter (KF), model synthesis, PMU.

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Section: B Literature Reviewmentioning

confidence: 99%

Real-time reduced steady state model synthesis of active distribution networks using PMU measurements

Mahmood

Hooshyar

Lavenius

et al. 2017

2017 IEEE Manchester PowerTech

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“…Research on power system model reduction is extensive, and several methodologies focusing on DSA have been implemented in software for automated model reduction [7], [6], [8]. Power system dynamic model reduction, typically known as Power System Dynamic Equivalencing [9], has the main aim of providing an equivalent system model able to reproduce the aggregated steady-state [10] and dynamic characteristics of the full-order network [11], while at the same time being compatible with the available computation tools for power system analysis [8]. In this equivalent model, the study area is a portion of the network which is preserved with full detail, i.e.…”

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confidence: 99%

Structured power system model reduction of non-coherent areas

Sturk

Vanfretti

Chompoobutrgool

2012

2012 IEEE Power and Energy Society General Meeting

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Abstract-This paper demonstrates how structured model reduction can be used to reduce the order of power systems without the need to identify coherent groups of generators. To this end the Klein-Rogers-Kundur 2-area system is studied in detail. It is shown how different modes of the system are captured as the model order is varied, which is of interest in e.g. distributed controller design, where the objective is to damp these oscillations. The power system is divided into a study area and an external area and the proposed algorithm is used to reduce the external area to a low order linear system, while retaining the nonlinear description of the study area. It is shown that this approach permits greater deviations from the steady-state than if a reduced system that is entirely linear is used, while still yielding accurate simulation results.Index Terms-Model reduction of power systems, internal systems, structured model reduction, dynamic equivalents

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“…Subsequently, the generators and loads of the external system are merged at the new buses and the external nodes are eliminated. A dynamic REI equivalent suitable for transient stability studies was presented in [10]. The authors propose to determine REI equivalents at the boundary buses of the study system.…”

Section: Introductionmentioning

confidence: 99%

Equivalent to represent inertial and primary frequency control effects of an external system

Weckesser¹,

Cutsem

2017

IET Generation, Transmission & Distribution

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This paper presents a novel equivalent, which is suitable for simulation of inertial and primary frequency control effects. In the model reduction procedure, dynamic power injectors are used to replace the external system and to mimic its dynamic behavior. The parameters of the equivalents are tuned with a simple approach presented in this paper. The effectiveness of the proposed method is demonstrated on a modified version of the ENTSO-E Dynamic Study Model. The results show that the system frequency response of the unreduced system is retained and a speedup of the simulations of around 4.0 is achieved.

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Dynamic REI equivalents for short circuit and transient stability analyses

Cited by 68 publications

References 40 publications

Real-time reduced steady state model synthesis of active distribution networks using PMU measurements

Real-time reduced steady state model synthesis of active distribution networks using PMU measurements

Structured power system model reduction of non-coherent areas

Equivalent to represent inertial and primary frequency control effects of an external system

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