A robust control strategy for shunt and series reactive compensators to damp electromechanical oscillations

Noroozian, M.; Ghandhari, Mehrdad; Andersson, Göran; Gronquist, J.; Hiskens, Ian A.

doi:10.1109/61.956774

Cited by 121 publications

(66 citation statements)

References 14 publications

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“…The individual elements of G SG (s ) can be found in the supplementary file accompanying this paper. Considering the traditional channel pairing as in (6) , the MSF for system (17) reduces to…”

Section: Analysis With No Compensationmentioning

confidence: 99%

“…However, the application of these concepts is done for the TCSC only. The approach taken in this paper to address the damping capabilities of both the SVC and TCSC differs from the aforementioned methodologies since: (a) as opposed to [16,17] , the FACTS devices are analysed using frequency domain tools and, as opposed to [18] , the SG representation considers the electrical dynamics and is not restricted to the swing equation only; (b) contrary to [16][17][18] , the analysis is fully multivariable, where the nature of the plant is encapsulated in transfer functions; (c) the system dynamic structure (i.e. both poles/eigenvalues and zeros) is comprehensively analysed, which is something not considered by [16,17] and is restricted to an eigenvalue analysis in [18] ; and (d) the control system performance is made explicitly available with its robustness assessment, which is only carried out in [17] .…”

Section: Introductionmentioning

confidence: 99%

“…For instance, in [16] a time-domain approach is followed, with the main emphasis being on the control of reactive power to provide damping. In [17] , a robust control method in the time-domain is used to design control laws for the SVC and TCSC based on the definition of energy functions. However, both devices are installed in the same test system, so it is not possible to examine the damping contribution of each component individually.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of the damping characteristics of two power electronics-based devices using ‘individual channel analysis and design’

Ugalde‐Loo

Acha

Licéaga‐Castro

2018

Applied Mathematical Modelling

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a b s t r a c tA comparison of the capabilities of two quite distinct power electronics-based 'flexible AC transmission systems' devices is presented. In particular, the damping of low frequency electromechanical oscillations is investigated aiming at improving the performance of power systems. The comparison is made using frequency domain methods under the 'individual channel analysis and design' framework. A synchronous generator feeding into a system with large inertia is used for such a purpose. Two system configurations including compensation are analysed: (a) in series in the form of a thyristor-controlled series compensator, and (b) in shunt through a static VAr compensator featuring a damping controller. Analyses are carried out to elucidate the dynamic behaviour of the synchronous generator in the presence of the power electronics-based controllers and for the case when no controller is present. Performance and robustness assessments are given particular emphasis. The crux of the matter is the comparison between the abilities of the static VAr compensator and the thyristor-controlled series compensator to eliminate the problematic switch-back characteristic intrinsic to synchronous generator operation by using the physical insight afforded by 'individual channel analysis and design'.

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Section: Analysis With No Compensationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the damping characteristics of two power electronics-based devices using ‘individual channel analysis and design’

Ugalde‐Loo

Acha

Licéaga‐Castro

2018

Applied Mathematical Modelling

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“…There are three modes of operation of TCSC depending upon the firing angle of the pulses fed to the thyristor [8].  Thyristor blocked mode  Thyristor by passed mode  Vernier operating mode…”

Section: Modes Of Operation Of Tcscmentioning

confidence: 99%

“…The firing angle is possible from 0 o to 90 o for each half cycle when it is generated from the zero crossing of the line current hence divided into two parts [8] [10]; Capacitive Boost mode: In capacitive boost mode a trigger pulse is supplied to the thyristor having forward voltage just before the capacitor voltage crosses the zero line, so a capacitor discharge current pulse will circulate through the parallel inductive branch. The discharge current pulse adds to the line current through the capacitor and causes a capacitor voltage that adds to the voltage caused by the line current.…”

Section: Vernier Operating Modementioning

confidence: 99%

Simulation Aspects of Thyristor Controlled Series Compensator in Power System

Arora¹

2013

IOSRJEN

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:The Thyristor controlled series compensator (TCSC) is one of the important members of FACTS family that is increasingly applied with long transmission lines by the utilities in modern power systems. It can have various roles in the operation and control of power systems, such as scheduling power flow; decreasing unsymmetrical components; reducing net loss; providing voltage support; limiting short-circuit currents; mitigating sub synchronous resonance; damping the power oscillation and enhancing transient stability control of power systems, systems and procedures are used to compensate dynamically the detrimental effect of nonlinear loads. The compensation process should be carried out without important alteration of the signal quality along with some benefits like reduction of losses in distribution lines, harmonic content minimization and power factor improvement. The dynamic behavior of industrial load requires the use of that compensator which can be adapted to the load changes. Thyristor Controlled Series Capacitor (TCSC) is an important FACTS device which has been used in power system transmission networks; these few aspects of the TCSC operation which we are simulating in ORCAD and MATLAB (i) To calculate the various resonance points in the impedance characteristics of the TCSC w.r.t. various firing angle. (ii) Contribution of the TCSC to power system operation and control system and study by implementing the TCSC in small power model of power system using ORCAD and MATLAB.

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A frequency domain model-based design of PSS and TCSC controller for damping the small signal oscillations in the power system

Salgotra

Pan

2018

Int Trans Electr Energ Syst

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Summary For improvement of the operation and control of the power system, the flexible AC transmission system devices are significantly used. This paper proposes a model‐based frequency response matching technique for designing a lead‐lag power system stabilizer and a thyristor controlled series capacitor controller to improve the small signal stability. The method relies on development of an appropriate reference model, based on the desired specifications that can be attainable by the system dynamics. The unknown controller parameters are obtained by the frequency response matching between the closed‐loop control system and the reference model. The efficacy of the proposed controllers is examined on an unstable test power system taken from the literature. Improvement of the damping factor and the other performance indices shows robustness and effectiveness of the proposed controllers for stabilizing the power system oscillations in comparison with some design methods prevalent in the literature. It is illustrated through rigorous simulation that the proposed controller works successfully for stabilizing the power system over a wide unstable operating conditions and perturbed system models.

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A robust control strategy for shunt and series reactive compensators to damp electromechanical oscillations

Cited by 121 publications

References 14 publications

Analysis of the damping characteristics of two power electronics-based devices using ‘individual channel analysis and design’

Analysis of the damping characteristics of two power electronics-based devices using ‘individual channel analysis and design’

Simulation Aspects of Thyristor Controlled Series Compensator in Power System

A frequency domain model-based design of PSS and TCSC controller for damping the small signal oscillations in the power system

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