Dynamic Load Models for Industrial Facilities

Liang, Xiaodong; Xu, Wilsun; Chung, C.Y.; Freitas, Walmir; Xiong, Kun

doi:10.1109/tpwrs.2011.2161781

Cited by 29 publications

(23 citation statements)

References 22 publications

(20 reference statements)

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“…After the measurements of the current and voltage, load impedance was calculated by using (8) and given in Figure 16. As seen in the Figure 16, magnitude of the load impedance varies between 0.172 Ω and 1.25 Ω with time.…”

Section: Results Of the Proposed Methods With Field Measurementsmentioning

confidence: 99%

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Harmonic Contributions of Utility and Customer Based on Load Model Using Field Measurements

Gül¹,

Gündoğdu²

2015

JPEE

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In recent years, sinusoidal waveform of the current and voltage disturbs in the electrical distribution system because of the due to the increasing number of non-linear loads. Many standards of IEC and IEEE standards have been published in order to limit the voltage and current waveform distortion. The operators of the electricity distribution network widely use the power quality monitoring systems at the point of common connection (PCC). It has been identified that there are substantial number of harmonic currents excess of the standards transferred to the grid according to the data obtained from power quality monitoring systems. In case of exceeding the limits specified in the standards, there is a need to determine the network and customer responsibilities for the implementation of required sanctions. In this study, using recorded data at the PCC of a medium voltage electrical distribution system, voltage and current harmonic distortion responsibilities of the network and customer are determined by the improved harmonic current vector method. Up-to-date load model based on field measurement which provides more accurate results has been used instead of the constant load impedance in the proposed method.

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Section: Results Of the Proposed Methods With Field Measurementsmentioning

confidence: 99%

“…The harmonic analysis studies of three-phase power distribution networks, modeling of loads [2]- [8], and the identification of customer contributions [9] are still up-to-date. Efforts to seek solutions for harmonics injected by the nonlinear load and under the condition of the load is not fully specified have begun a few decades ago [10].…”

mentioning

confidence: 99%

Harmonic Contributions of Utility and Customer Based on Load Model Using Field Measurements

Gül¹,

Gündoğdu²

2015

JPEE

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“…This is generally because of the difficulty in obtaining accurate data but sometimes it has simply been treated as insignificant [1][2][3][4]. However, because of system stability events which involve load response dynamics, load modelling has been gaining more interest from both the research and industry sectors [1][2][3][4][5][6][7]. As industrial loads are normally large in size and complex in nature, their dynamic behaviours play an important part in terms of system stability [1,3].…”

Section: Introductionmentioning

confidence: 99%

Dynamic load modelling of a paper mill for small signal stability studies

Wong¹,

Haque²

2014

IET Generation, Transmission & Distribution

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This study considers a power system with half the demand comprises of industrial loads with large rotating machines. The dynamic behaviour of these loads during disturbance is crucial to system stability. This study describes a practical approach to develop Laplace transfer function (TF) model of a mill load connected to this power system. A PSCAD/EMTDC™ simulation model of the mill ('the detailed model') is built from information on the types of load within the mill and verified in a piece-wise manner, i.e., against individual motor starts. Instead of using generic load models, system identification theory is applied to evaluate the TF load model from simulated disturbance responses for both voltage and frequency changes. The main objective is to accurately represent the load behaviour particularly during small signal disturbances. It is recognised that large signal requirements of a load model for transient stability studies are important but the inevitable non-linearity of such a model would tend to saturate the loads' behaviour during smaller disturbances. The developed small signal load model is then tested using practical disturbance profiles from this power system. This modelling approach allows development work to commence before real-life disturbance measurements are available since such data are currently scant.

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“…Load modeling is the process of defining load characteristics via mathematical formulas that describe the characteristics of load changes in response to voltage and frequency variations. Load modeling techniques can be classified as either component based [7][8][9][10][11] or measurement based [12][13][14][15][16][17][18][19][20][21][22][23][24], depending on the modeling procedure. In component-based load modeling, measuring devices need not be installed in the field.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, most current research on load modeling is focused on measurement-based methods, even though these methods require installation of an additional measuring device for every load in the power system. Measurement-based load modeling can be sub-classified into static load modeling [12][13][14] and dynamic load modeling [15][16][17][18][19][20][21][22][23][24]. Although dynamic load modeling can reflect the transient characteristics of loads, it requires high-density data samples on the time axis.…”

Section: Introductionmentioning

confidence: 99%

EMS-Data-Based Load Modeling to Evaluate the Effect of Conservation Voltage Reduction at a National Level

Nam

Kang

Lee³

et al. 2013

Energies

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This paper proposes a linearized load model to evaluate the effect of conservation voltage reduction at a national level. In this model, the respective active and reactive linearizing parameters for active and reactive loads in a power system are estimated using energy management system (EMS) data resulting from conservation voltage reductions. To verify the validity of the linearized load model, PSS/E simulations were conducted for a test power system. Given that conservation voltage reductions are usually executed in the range of 2.0%-5.0%, the proposed model was found to be sufficient to accurately evaluate the effect of conservation voltage reduction. Additionally, Korean EMS data were used to estimate the linearizing parameters for aggregated loads in an actual power system.

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Dynamic Load Models for Industrial Facilities

Cited by 29 publications

References 22 publications

Harmonic Contributions of Utility and Customer Based on Load Model Using Field Measurements

Harmonic Contributions of Utility and Customer Based on Load Model Using Field Measurements

Dynamic load modelling of a paper mill for small signal stability studies

EMS-Data-Based Load Modeling to Evaluate the Effect of Conservation Voltage Reduction at a National Level

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