Identification of Electromechanical Modes and Placement of PSSs Using Relative Gain Array

Milanović, Jovica V.; Duque, Andres

doi:10.1109/tpwrs.2003.821454

Cited by 44 publications

(35 citation statements)

References 13 publications

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“…The concept of induced torque is introduced in [2] to study the interactions between power system stabilizers and FACTS stabilizers. Furthermore, the relative gain array (RGA) [5] method has been shown in [3,6] to be suited to quantify the interactions in power system steady state and dynamic studies.…”

Section: Introductionmentioning

confidence: 99%

Potential interactions between VSC HVDC and STATCOM

Shen

Barnes

Milanović

et al. 2014

2014 Power Systems Computation Conference

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This paper analyses the dynamic behaviour of a power system with both FACTS and VSC HVDC, in particular, possible potential interactions between a STATCOM and a VSC in a point-to-point HVDC link. The investigation considers different STATCOM locations and VSC control strategies. A generic linearized mathematic model is firstly developed, where a combined method involving relative gain array (RGA) and modal analysis is applied to identify the interactions within the plant model and the outer controllers. The interactions identified are further analysed by creating a set of scenarios integrating both the STATCOM and VSC HVDC into a dynamic equivalent realistic AC system. Results show a collaborative operation between the STATCOM and the closely located VSC with reasonably tuned controllers.

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Section: Introductionmentioning

confidence: 99%

Potential interactions between VSC HVDC and STATCOM

Shen

Barnes

Milanović

et al. 2014

2014 Power Systems Computation Conference

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“…RGA can be an addition to the residue analysis for a systematic application in large power system studies. It measures two-way interactions between a determined input and output [34].…”

Section: Residue Analysismentioning

confidence: 99%

System stability improvement through optimal control allocation in voltage source converter-based high-voltage direct current links

Pipelzadeh

Chaudhuri

et al. 2012

IET Gener. Transm. Distrib.

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Control of both active and reactive power in voltage source converter (VSC) based HighVoltage Direct Current (HVDC) links could be very effective for system stability improvement. The challenge, however, is to properly allocate the overall control duty among the available control variables in order to minimize the total control effort and hence allow use of less expensive converters (actuators). Here relative gain array (RGA) and residue analysis are used to identify the most appropriate control loops avoiding possible interactions.Optimal allocation of the secondary control duty between the two ends of the VSC HVDC link is demonstrated. Active and reactive power modulation at the rectifier end, in a certain proportion, turns out to be the most effective. Two scenarios, with normal and heavy loading conditions, are considered to justify the generality of the conclusions. Subspace-based multi-input-multi-output (MIMO) system identification is used to estimate and validate linearized state-space models through pseudo random binary sequence (PRBS) probing.Linear analysis is substantiated with non-linear simulations in DIgSILENT PowerFactory with detailed representation of HVDC links.

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“…It was first introduced as a steady measure of interactions [26] and then extended to the frequency domain [27]. This method is also considered as an analysis tool, which is efficient in the identification of electromechanical modes and placement of the PSS [28] and also for selecting the supplementary control signals for FACTS controllers to damp inter-area oscillations in power systems [29]. The RGA matrix is calculated on the basis of transfer functions between selected outputs and inputs [30].…”

Section: Definition Of the Rgamentioning

confidence: 99%

Coordinating Control of Static VAR Compensators and Synchronous Generators Based on Selected Remote Measurements

Zabaiou

Dessaint

Okou

et al. 2011

Electric Power Components and Systems

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The wide-area coordinating control concept has gained rapid interest in power system control. It now offers substantial potential and great challenge to the power industry. This article proposes a new control design method based on widearea measurements to coordinate generator excitations and static VAR compensator auxiliary controls. A state space model of a multi-machine power system that includes a static VAR compensator is derived first. This model clearly shows the interactions between a static VAR compensator and generator variables. Next, remote measurements are used to generate coordinating signals for the static VAR compensator controller and the generator excitations. Two different control strategies are proposed. The first controller decouples the system dynamics by compensating the interaction terms between the static VAR compensator and generator variables. The second controller utilizes the relative gain array concept to evaluate the interactions. Only signals that contribute to the strongest interactions are used by the controller to reduce the interactions between the system components considerably. The second controller with a reduced set of measurements is compared to the first controller with full measurements. Results show that performances of both controllers are very similar. They provide significant additional damping for both local and inter-area oscillations. Communication time-delay effects are also considered in this study.

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Identification of Electromechanical Modes and Placement of PSSs Using Relative Gain Array

Cited by 44 publications

References 13 publications

Potential interactions between VSC HVDC and STATCOM

Potential interactions between VSC HVDC and STATCOM

System stability improvement through optimal control allocation in voltage source converter-based high-voltage direct current links

Coordinating Control of Static VAR Compensators and Synchronous Generators Based on Selected Remote Measurements

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