Aggregated models and transient performances of a mixed wind farm with different wind turbine generator systems

Li, H.; Yang, Chao; Zhao, Bin; Wang, H.S.; Chen, Zhe

doi:10.1016/j.epsr.2012.04.019

Cited by 70 publications

(31 citation statements)

References 12 publications

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“…In fact, a 2 MW wind turbine is scaled up to represent a 100 MW wind farm. The assumption of wind farms is supported by several studies [22,23] suggesting that dynamic behaviour of an aggregated wind farm is sufficient for power system dynamics studies. In this system, the complete dynamics of the power system includes wind turbine aerodynamics, shaft system, induction generator, RSC and GSC converter controllers, DC-link model and series compensated transmission line dynamics.…”

Section: Studied Power Systemmentioning

confidence: 99%

Analysis of sub‐synchronous resonance in doubly‐fed induction generator‐based wind farms interfaced with gate – controlled series capacitor

Mohammadpour¹,

Ghaderi²,

Santi³

2014

IET Generation, Transmission & Distribution

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This paper first presents a step-by-step tutorial on modal analysis of a doubly-fed induction generator (DFIG)-based series compensated wind farm. The model of the system includes a wind turbine aerodynamics, a sixth-order order induction generator, a second-order two-mass shaft system, a fourth-order order series compensated transmission line, an eighth-order rotor-side converter (RSC) and grid-side converter (GSC) controllers, and a first-order DC-link model. Then, using modal analysis and time-domain simulations, it is shown that a fixed-series compensated DFIG is highly unstable due to the subsynchronous resonance (SSR) mode. In order to damp the SSR mode, the wind farm is interfaced with the gate-controlled series capacitor (GCSC) -which is a new series flexible AC transmission system (FACTS) device. A SSR damping controller (SSRDC) is designed for the GCSC using residue-based analysis and root locus diagrams, and an effective input control signal (ICS) to the SSRDC is identified in order to simultaneously increase damping of both the SSR and super-synchronous (SupSR) modes. The IEEE first benchmark model on SSR is adapted with an integrated DFIG-based wind farm to perform studies. Matlab/Simulink is used as a tool for designing process, and PSCAD/EMTDC is used for time-domain simulations.Nomenclature R line transmission line resistance (pu) X line transmission line reactance (pu) X T transformer reactance (pu) X S system reactance (pu) X C fixed series capacitor (pu) X tg transformer reactance in grid-side converter (GSC) (pu) i lq , i ld transmission line qd-axis currents (pu) i qg , i dg GSC qd-axis currents (pu) i qs , i ds stator qd-axis currents (pu) i qr , i dr rotor qd-axis currents (pu) v qs , v ds generator's terminal qd-axis voltages (pu) v qc , v dc qd-axis voltages across the fixed series capacitor (pu) v qr , v dr generator's rotor qd-axis voltages (pu) v qg , v dg GSC terminal qd-axis voltages (pu) E Bq , E Bd infinite bus qd-axis voltages (pu) Q s 0.5(v qs i ds −v ds i qs ), stator reactive power (pu) P s 0.5(v qs i qs + v ds i ds ), stator active power (pu) Q r 0.5(v qr i dr −v dr i qr ), rotor reactive power (pu) P r 0.5(v qr i qr + v dr i dr ), rotor active power (pu) Q g 0.5(v qg i dg −v dg i qg ), GSC reactive power (pu) P g 0.5(v qg i qg + v dg i dg ), GSC active power (pu) Q line 0.5(v ql i dl −v dl i ql ), transmission line reactive power (pu) P line 0.5(v ql i ql + v dl i dl ), transmission line active power (pu)T e 0.5X M (i qs i dr −i ds i qr ), electric torque (pu) i 0s , v 0s stator zero sequence components (pu) i 0r , v 0r rotor zero sequence components (pu) T tg mechanical torque between two masses (pu) P w , T w wind power and wind torque (pu) D g , D t damping coefficient of generator and turbine (pu) D tg damping coefficient between two masses (pu) K tg inertia constant of turbine and generator (pu) H t , H g inertia constants of turbine and generator (s) C DC-link capacitor (F) I DC DC-link current (A) v DC DC-link voltage (V) V w wind speed (m/s) R rotor radius of the wind...

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Section: Studied Power Systemmentioning

confidence: 99%

Analysis of sub‐synchronous resonance in doubly‐fed induction generator‐based wind farms interfaced with gate – controlled series capacitor

Mohammadpour¹,

Ghaderi²,

Santi³

2014

IET Generation, Transmission & Distribution

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“…Despite its exponential growth over the last decade, wind power still has great potential for future development based on ever increasing reliability and ever reducing costs in wind power generation. With the development of power electronics and control technology, the cost per kW of a power converter has lowered and a squirrel-cage induction generator (SCIG) with a full-scale power converter has become an attractive solution in variablespeed wind energy conversion systems (WECSs) [1,2]. Robustness, affordable price and low maintenance requirements as well as costs make the SCIG a prospective choice for wind generation.…”

Section: Introductionmentioning

confidence: 99%

“…An outstanding overview of the researched methods for induction machines is given in [6][7][8][9][10]. Although different solutions for the sensorless control of induction machines have been proposed in research studies [6][7][8][9][10][11][12][13][14][15][16][17][18][19], the magnetization at non-zero speeds of SCIGs has still remained a research challenge.…”

Section: Introductionmentioning

confidence: 99%

Magnetization of speed sensorless squirrel-cage induction generator for wind power application using a phase-locked loop

Kutija

Sumina

Čolović³

2015

Electric Power Systems Research

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“…In summary, the methods in [3][4][5][6][7][8][9] suggest an aggregated model of similar type with identical rating. Also the equivalent generator parameter just used the re-scaled value of WTGs in the WF.…”

Section: Introductionmentioning

confidence: 99%

“…However, all turbines are assumed to be operating in the same point. An aggregated model was developed for the mixed WF with SCIG and doubly fed induction generator (DFIG) as reported in [9]. However, the method for obtaining the equivalent model generator parameters is not straightforward.…”

Section: Introductionmentioning

confidence: 99%

Dynamic equivalent of wind farm model for power system stability studies

2017

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A new dynamic equivalencing method for stability assessment of a grid-integrated wind farm is proposed in this article. The accuracy of the method is validated for a 34-bus system with 28-unit wind farm connected to Indian utility system. This wind farm consists of several wind turbines of two different ratings. The electrical parameters of the equivalent generator are derived from the mathematical model of the squirrel-cage induction generator. The parameters of the equivalent wind-turbine generator are optimized to yield minimum deviation from the detailed system response using genetic algorithm. The small-signal and transient stability responses of the study system with detail wind farm and equivalent model are simulated using MATLAB. Equivalent model eigenvalues are compared to the centre of inertia based detailed system eigenvalue. In addition, the computed eigenvalues and time-domain responses of the proposed equivalent model, detailed wind farm are compared against weighted model proposed earlier. In most of the investigated cases, the average error of dynamic responses between the proposed equivalent and detailed models are less when compared to weighted model. Thus, the large-signal responses of the proposed equivalent model show superior agreement with detailed system response.

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Aggregated models and transient performances of a mixed wind farm with different wind turbine generator systems

Cited by 70 publications

References 12 publications

Analysis of sub‐synchronous resonance in doubly‐fed induction generator‐based wind farms interfaced with gate – controlled series capacitor

Analysis of sub‐synchronous resonance in doubly‐fed induction generator‐based wind farms interfaced with gate – controlled series capacitor

Magnetization of speed sensorless squirrel-cage induction generator for wind power application using a phase-locked loop

Dynamic equivalent of wind farm model for power system stability studies

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