Calculation of parameter ranges for robust gain tuning of power system controllers


Autoria(s): Oliveira, Ricardo Vasques de; Ramos, Rodrigo Andrade; Bretas, Newton Geraldo
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

04/11/2013

04/11/2013

2012

Resumo

This work proposes a computational tool to assist power system engineers in the field tuning of power system stabilizers (PSSs) and Automatic Voltage Regulators (AVRs). The outcome of this tool is a range of gain values for theses controllers within which there is a theoretical guarantee of stability for the closed-loop system. This range is given as a set of limit values for the static gains of the controllers of interest, in such a way that the engineer responsible for the field tuning of PSSs and/or AVRs can be confident with respect to system stability when adjusting the corresponding static gains within this range. This feature of the proposed tool is highly desirable from a practical viewpoint, since the PSS and AVR commissioning stage always involve some readjustment of the controller gains to account for the differences between the nominal model and the actual behavior of the system. By capturing these differences as uncertainties in the model, this computational tool is able to guarantee stability for the whole uncertain model using an approach based on linear matrix inequalities. It is also important to remark that the tool proposed in this paper can also be applied to other types of parameters of either PSSs or Power Oscillation Dampers, as well as other types of controllers (such as speed governors, for example). To show its effectiveness, applications of the proposed tool to two benchmarks for small signal stability studies are presented at the end of this paper.

Identificador

Sba Controle & Automação,v.23,n.3,p.331-345,2012

0103-1759

http://www.producao.usp.br/handle/BDPI/39095

10.1590/S0103-17592012000300007

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-17592012000300007&lng=en&nrm=iso&tlng=en

http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0103-17592012000300007&lng=en&nrm=iso&tlng=en

http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0103-17592012000300007&lng=en&nrm=iso&tlng=en

Idioma(s)

eng

Publicador

Sociedade Brasileira de Automática

Relação

Sba: Controle & Automação Sociedade Brasileira de Automatica

Direitos

openAccess

Palavras-Chave #Power system dynamics and control #small signal stability #power system stabilizer #automatic voltage regulator #robust control #linear matrix inequality #Dinâmica e controle de sistemas de potência #estabilidade a pequenas perturbações #estabilizador de sistemas de potência #regulador automático de tensão #controle robusto #desigualdade matricial linear
Tipo

article

original article