An interim dynamic induction motor model for stability studies in the WSCC

Pereira, L.; Kosterev, Dmitry; Mackin, P.; Davies, Donald W.; Undrill, John; Zhu, W.

doi:10.1109/tpwrs.2002.804960

Cited by 160 publications

(54 citation statements)

References 8 publications

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“…The above process leads to a decrease in terminal voltage magnitude Ut, and the slip frequency ω holds constant. Moreover, the terminal voltage rotating vector ωs is invariable according to (9), thus leading the terminal voltage phase relative to With the concepts of multi-timescale coupling and coupled power balancing introduced, we next discuss in detail the dynamic performance of grid-connected IM loads under short and long timescale disturbances from the aspect of voltage magnitude-phase dynamics.…”

Section: Dynamic Performance Of Grid-connected Im Loads Under a Shortmentioning

confidence: 99%

“…The result of static and dynamic power balancing in the IM is that the terminal voltage rotating vector slows down according to (9) due to the decelerated rotor speed ωr. As a result, −θut increases.…”

Section: Dynamic Performance Of Grid-connected Im Loads Under a Long mentioning

confidence: 99%

“…Since the static power between the IM demand and network supply is balanced before and after the disturbance, the air-gap power Pe * obtained from the terminal voltage can be derived from the infinite voltage by The result of static and dynamic power balancing in the IM is that the terminal voltage rotating vector slows down according to (9) due to the decelerated rotor speed ω r . As a result, −θ ut increases.…”

Section: Abnormally Low Voltage Analysismentioning

confidence: 99%

“…For the operation of utility grid, blackout accident will cause serious economic damages [6,7], while the characteristics of IM is one of the important factors in such issue studies. Thus, it is understandable that the voltage collapses experienced by the Western Systems Coordinating Council (WSCC) system on both 10 August 1996 and 4 August 2000 cannot be properly reproduced by simulations that do not contain dynamic IM loads [8,9]. In addition to the utility grid, IMs also impact the operation of microgrids.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Power-Balancing Based Induction Machine Model for Power System Dynamic Analysis in Electromechanical Timescale

Wang¹,

Yuan²,

Zhang³

2018

Energies

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Power balance, including active and reactive power, between the system supply and the demand from induction motor loads is a potentially necessary condition for system stable operation. Motion of system states depends on the balancing of active and reactive powers. Therefore, this paper proposes an induction machine model in electromechanical timescale from a power balancing viewpoint, in which the induction motor load is modeled as a voltage vector driven by power balancing between the system supply and the demand from induction motor load, so as to describe the dynamic characteristics of induction motor loads in a physical way for power system dynamic analysis. Then a voltage magnitude-phase dynamic analysis with the proposed induction machine model is constructed. Based on the voltage magnitude-phase dynamic analysis, the characteristics of grid-connected induction motor loads are explored, and the instability mechanisms of grid-connected induction motor loads induced by a large disturbance are discussed. It is shown that the dynamic behavior of grid-connected induction motor loads can be described as the dynamic process of the terminal voltage vector driven by coupled active and reactive power balancing in different timescales. In this way, the dynamic behavior of induction motor loads in terms of voltage magnitude-phase dynamics and its physical characteristics are clearly illustrated. Time-domain simulation results are presented to validate the above analyses.

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Section: Dynamic Performance Of Grid-connected Im Loads Under a Shortmentioning

confidence: 99%

Section: Dynamic Performance Of Grid-connected Im Loads Under a Long mentioning

confidence: 99%

Section: Abnormally Low Voltage Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Power-Balancing Based Induction Machine Model for Power System Dynamic Analysis in Electromechanical Timescale

Wang¹,

Yuan²,

Zhang³

2018

Energies

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“…The results from WSCC load modeling workgroup in USA show that pure static load model over estimates the damping characteristics. Only the hybrid model with 25% motor model can achieve fairly accurate dynamic stability characteristics [8][9]. For transit power system angle stability analysis, the plant electric consumption has significant impact on stability characteristics of generators, since the percentage of plant electric consumption in most thermal power stations can reach 4%~ 6% [10].…”

Section: Introductionmentioning

confidence: 99%

In-Depth Study on Synthesis Load Modeling

Wang¹,

Tang²,

Zhao³

2013

EPE

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Detailed procedures for the modeling of synthesis load models (SLM) of actual power network are presented, then the classification indices based on 1oad characteristics and the principle of load classification are expounded. Based on the results of general investigation of 220 kV and 330 kV substations in China's power grid, the load characteristics are classified, and detailed load characteristic investigation of selected different kinds of typical substations are carried out. By use of statistical synthesis, the SLM for typical substations, in which the distribution networks are taken into account, are built; and the modeling results are disseminated and applied to whole Chinese power grid. Besides, the load model parameters are evaluated and verified via post-disturbance simulation method. The effectiveness of the built SLM is validated by the fitting of some disturbance incidents.

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Application of unknown input observers to locate forced oscillation source

Luan

Gan

Wang

et al. 2019

Int Trans Electr Energ Syst

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Summary In this paper, the problem of locating forced oscillation source at device level is addressed, using unknown input observer (UIO)‐based method to realize oscillation source isolation. Firstly, a linear power system model suitable for oscillation source detection and isolation is derived. Typical oscillation sources, namely, oscillation sources from prime movers and speed governors, excitation systems, are included in the model as unknown inputs. Then, a systematic method using UIOs and fault isolation scheme to locate oscillation source is proposed. Using the disparities between the model responses generated by UIOs and the recorded responses, the proposed method establishes a one‐to‐one relationship between a residual and an oscillation source. The location of oscillation source at device level is accomplished on the basis of the different sensitivities of residuals to oscillation sources from different devices. The detectability of oscillation source and the numerical check are also discussed. The effectiveness of the proposed location method is verified by several simulation examples. The results show that the location of oscillation source by the proposed method is effective and is accurate to control the device that the oscillation source originates from.

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An interim dynamic induction motor model for stability studies in the WSCC

Cited by 160 publications

References 8 publications

Power-Balancing Based Induction Machine Model for Power System Dynamic Analysis in Electromechanical Timescale

Power-Balancing Based Induction Machine Model for Power System Dynamic Analysis in Electromechanical Timescale

In-Depth Study on Synthesis Load Modeling

Application of unknown input observers to locate forced oscillation source

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