VOLTAGE STABILITY PHENOMENON ANALYSIS: TRANSIENT AND LONG TERM TIME DOMAIN SIMULATION / ANÁLISE DO FENÔMENO DA ESTABILIDADE DE TENSÃO NO DOMÍNIO DO TEMPO: SIMULAÇÃO DOS PERÍODOS TRANSITÓRIO E DE LONGO-TERMO

AUTOR(ES)
DATA DE PUBLICAÇÃO

1997

RESUMO

This work is concerned with voltage stability analysis in time domain including transient and long-term time frames. Different power system stability forms are defined and classified according to the variable of interest and with the disturbance magnitude. Using a simple power system model, it is shown through dynamics formulations important aspects of the voltage stability phenomenon. Important aspects of load characteristics of constant power type and mixed (constant power/constant impedance) type on voltage stability are investigated. A static compensator model is included in the analysis and it is verified that under specific operation conditions the control actions are not efficient. Scenarios show the adverse effects of long-term control devices such as overexcitation limiters and under load tap changers on voltage stability. One version of the transient stability program TRANSTAB is modified in order to simulate transient and long-term voltage phenomena. The resulting modified computer program is called VOLTDYN. Two versions of the VOLTDYN progran are available. The first version uses a variable step-size algorithm based on the trapezoidal method. The other includes a variable step-size algorithm based on the Adams- Bashforth-Moulton method.

ASSUNTO(S)

time domain estabilidade de tensao transient stability voltage stability estabilidade transitoria dominio do tempo

ACESSO AO ARTIGO

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