Assessment of Capacitance for Self-Excited Induction Generator in Sustaining Constant Air-Gap Voltage under Variable Speed and Load

Sharma, Ashish; Kaur, Gagandeep

doi:10.3390/en11102509

Cited by 25 publications

(4 citation statements)

References 38 publications

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“…The parallel branch can be modified into a series equivalent magnetizing inductance (𝐿 𝑚 ) and iron core resistance ( 𝑅 𝑖𝑐𝑠 ). These series components of the parallel branch are calculated as (18) and (19).…”

Section: Modified Equivalent Circuits Of Seigmentioning

confidence: 99%

An accurate dynamical model of induction generator utilized in wind energy systems

Nasir

2022

IJEECS

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Due to the advantages of a self-excited induction generator (SEIG), it plays a main role in sources of renewable energy, such as wind turbines (WT). The regulation of terminal voltage and frequency is poor under variable rotor speed and load conditions at stand-alone operation mode. The generator terminal voltage depends on the excitation capacitance which can be controlled by a capacitor bank and static voltage compensator. The dynamical model of the machine is described by differential equations in D-Q axes transformations of the synchronously rotating frame. Many models of analysis are proposed in the literature. In those models, several approximations are used to simplify the process of calculations, such as neglecting the iron core resistance, stray load resistance, stator and rotor leakage reactance, and magnetic saturation. In this work, a comprehensive dynamic model of the SEIG-WT is performed to analyze the system performance under transient and steady-state conditions. This dynamic model considers the effect of all machine parameters variation. New analytical formulas are used for to accurate calculation of minimum and maximum values of excitation capacitance and generator rotor cut-off and maximum speed. The dynamic model results are partially compared with experimental results, and accurate agreement is shown.

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Section: Modified Equivalent Circuits Of Seigmentioning

confidence: 99%

An accurate dynamical model of induction generator utilized in wind energy systems

Nasir

2022

IJEECS

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“…Such reactive power issues are governing as an important ancillary service for the system operations along with balancing the electric power supply and demand. In most of the available studies technical issues are discussed in which fast acting dynamic compensation is used to control the system voltage response in minimum time [8][9][10][11]. It has been investigated that the use of dynamic compensators alone makes the system compensation costly and static compensators alone cannot be used for voltage control.…”

Section: Introductionmentioning

confidence: 99%

Reactive Power Cost Optimization Acquiring the Combined Properties of Static and Aggregate Dynamic Load as Composite Load Model

Saxena,

Kumar,

Gebreyohans

2020

IJEAT

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In electrical systems especially isolated wind and diesel based hybrid systems, voltage control has been achieved in several works from adequate supply of reactive power using STATCOM/SVC as dynamic compensators. However, in most of the existing works, studies are performed only with static loads which do not have any influence of previous system conditions. In such available studies, the two major concerns were (i) cost based studies, and (ii) control techniques of dynamic compensation. The electrical systems are always influenced by the unrealistic load modelling in such systems which is almost untouched in available works and therefore motivate the authors to work on it. Realistic loads are of composite nature that composes the blend of characteristics that acquire static as well as dynamic nature of the load. In present work, the authors are interested to investigate the lower cost of reactive power with composite load for best proportion of dynamic and static compensations. The study is done in MATLAB software with 10% step increment in reactive power demand and input wind power to analyse compensation effect for extreme voltage deviation of pu at load end as recommended by several energy policies and standard IEC 60038.

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“…The regulation of voltage and the stability in the voltage build-up process of SEIG are sensitively affected by excitation capacitance, rotor speed, and the variation of motor parameters and load [21], [22]. It is essential to ensure, the appropriate value of capacitor is basic essential for the SEIGbased system to self excitation [23], [24], which provided the lagging magnetizing reactive power to maintain the air gap flux linkage of induction machine between the stator and rotor [25].…”

Section: Introductionmentioning

confidence: 99%

Voltage Build-Up Analysis of Self-Excited Induction Generator With Multi-Timescale Reduced-Order Model

Teng

Long

et al. 2019

IEEE Access

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Self-excited induction generator (SEIG) has received a lot of attentions for its increasing application in distributed generation systems with the essential feature of low cost. To analysis, the dynamic and transient performance of SEIG, several modifications of the mathematical models have been developed for improving the regulation of voltage and frequency. But these models are still complicated to be used in practice. Based on the transient equivalent circuit, a reduced-order model of SEIG with complex transformation in the two-phase stationary reference frame is realized for the transient analysis of voltage build-up. In this simplified model, the coefficients of the characteristic polynomial with multi-timescale time constants are proposed. Moreover, the physical interpretation of system transient behavior with the reconstructed time constants is established and visualized. Particularly, the upper and lower limits of the capacitance and speed for the SEIG with different parameters variation are simulated and analyzed respectively. The validation and the accuracy of the SEIG model are verified for the transient analysis of the voltage build-up. It is proved that the reduced-order model can be effectively used to insight the dynamic stability of SEIG voltage build-up with the multi-timescale. INDEX TERMS Autonomous system, characteristic polynomial equations, complex coefficients, multi-timescale, self-excited induction generator, voltage build-up analysis.

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Assessment of Capacitance for Self-Excited Induction Generator in Sustaining Constant Air-Gap Voltage under Variable Speed and Load

Cited by 25 publications

References 38 publications

An accurate dynamical model of induction generator utilized in wind energy systems

An accurate dynamical model of induction generator utilized in wind energy systems

Reactive Power Cost Optimization Acquiring the Combined Properties of Static and Aggregate Dynamic Load as Composite Load Model

Voltage Build-Up Analysis of Self-Excited Induction Generator With Multi-Timescale Reduced-Order Model

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