Robust damping controller design in power systems with superconducting magnetic energy storage devices

Pal, Bikash C.; Coonick, A.H.; Macdonald, D. C.

doi:10.1109/59.852139

Cited by 59 publications

(10 citation statements)

References 16 publications

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“…Effective feedback signals for the controller can be found by the methods of residues [27], where residues are the product of modal controllability and modal observability. The selection of the best feedback signals was made by comparison of the residues for different signals.…”

Section: Test System and Control Taskmentioning

confidence: 99%

Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines

Hossain

Pota

Ugrinovskii

et al. 2010

IEEE Trans. Sustain. Energy

110

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A robust multivariable controller with the objective of enhancing the low-voltage ride-through (LVRT) capability of wind farms with fixed-speed induction generators is presented in this paper. The nonlinear dynamics of the wind generator is represented as a linear system and a norm-bounded nonlinear uncertain term, derived from the Cauchy remainder of the Taylor series. The designed robust controller provides acceptable post-fault performance for both small and large perturbations. Large disturbance simulations demonstrate that the designed controller enhances voltage stability as well as transient stability of the system during lowvoltage ride-through transients and thus enhances the LVRT capability of fixed-speed wind generators.

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Section: Test System and Control Taskmentioning

confidence: 99%

Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines

Hossain

Pota

Ugrinovskii

et al. 2010

IEEE Trans. Sustain. Energy

110

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show abstract

“…If no stabilising controller with a specified order is found, the order can be increased before repeating the entire procedure. The application of this numerical approach for robust loworder controller design has been demonstrated on sample power system models [13] but the application so far has been restricted to a SISO design. In view of the prospect of enhancing the damping of multiple swing modes through a single device employing multiple remote/global signals, the problem has been reformulated in the multivariable framework for TCPAR control design with three feedback signals, as described earlier.…”

Section: Simultaneous Stabilisation: Eigenvalue-distance Minimisationmentioning

confidence: 99%

“…The concept of robust and low-order controller design by weighted and normalised eigenvalue-distance minimisation (WNEDM) technique is demonstrated in [13] for a power system model through superconducting magnetic energy storage (SMES) device to damp out oscillations due to inter-area modes. The idea was to place the closed-loop poles at desired locations in the left half of the eigen-plane.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous stabilisation approach for power system damping control design through TCPAR employing global signals

Pal

Chaudhuri

Zolotas

et al. 2004

IEE Proc., Gener. Transm. Distrib.

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A robust damping control design methodology for a thyristor controlled phase angle regulator using global signals is proposed based on the simultaneous stabilisation approach. The numerical design algorithm determines the controller parameters in order to guarantee closed-loop poles in the left half plane with preferential treatment to those corresponding to the inter-area modes. Plant models under different operating conditions are incorporated in the design formulation to achieve the desired performance robustness. A three-input/single-output controller is designed for the TCPAR to provide adequate damping to the critical inter-area modes of a study system model. Based on the observability of the inter-area modes, real power flows from remote locations are used as feedback stabilising signals. The damping performance of the controller is examined in the frequency and time domains and is found to be robust against varying power-flow patterns, nature of loads, tie-line strengths and system non-linearities, including saturation

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“…The application of STATCOM for improved performance during transients for grid connected DFIG are given in [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. All these methods are summarized briefly as: 1) initially, using some external resistors called crowbars are used on the DFIG rotor side during the grid fault; and 2) superior techniques that inject series voltage to sustain the pre-fault voltages across the DFIG stator terminals with the help of external voltage-source converter.…”

Section: Introductionmentioning

confidence: 99%

Design of DFIG Converters to Overcome Grid Faults Using Improved Stator Flux Based Field Oriented Control and STATCOM Controller

Ananth¹,

Kumar

2018

Technol Econ Smart Grids Sustain Energy

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The doublyfed induction generator based wind energy conversion system is attracting the energy production market for the last decade. It is due to the facts like large rating single unit, withstand to grid disturbances, independent real and reactive power flow control and mainly low power converter ratings. However, under severe short circuit faults, the doubly fed induction generator (DFIG) is constrained to be in synchronism with the grid as is posed by the modern grid codes. For this, dynamic and transient response of DFIG converter unit control needs to be modified for sustainability and reliability. The article will show that DFIG will follow better grid code requirements using proposed improved stator flux based field oriented control scheme in Rotor Side Converter. Further, a three levels STATCOM controller is externally placed near the grid point to further increase its capability under transients. This can be achieved by minimizing DC offset currents to zero by controlling stator flux decay during transients. The stator d and q axis flux wave is circular during steady state and also deviate its shape and characteristics during transients. This feature is restored using proposed FOC technique and helps in maintaining a minimum voltage and current in rotor and stator circuit. This technique not only improves LVRT but also ensures a longer lifetime of the machine during major disturbances.

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Robust damping controller design in power systems with superconducting magnetic energy storage devices

Cited by 59 publications

References 16 publications

Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines

Simultaneous STATCOM and Pitch Angle Control for Improved LVRT Capability of Fixed-Speed Wind Turbines

Simultaneous stabilisation approach for power system damping control design through TCPAR employing global signals

Design of DFIG Converters to Overcome Grid Faults Using Improved Stator Flux Based Field Oriented Control and STATCOM Controller

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