Improvement of precise P/V curve considering effects of voltage-dependent load models and transmission losses for voltage stability analysis

Author

Shin, J.R. ; Kim, B.S. ; Chae, M.S. ; Sebo, S.A.

Author_Institution

Dept. of Electr. Eng., Kon-Kuk Univ., Seoul, South Korea

Volume

149

Issue

4

fYear

2002

fDate

7/1/2002 12:00:00 AM

Firstpage

384

Lastpage

388

Abstract

The P/V (power/voltage) curve of a power system has been often used for the analysis of voltage stability. If the P/V curve is evaluated with improved precision, then it can have an important role in the analysis of voltage stability. An approach is presented to improve the precision of the P/V curve of a power system, considering the effect of voltage dependency of electric loads and power transmission losses. For electric loads, the use of the voltage-dependent load model, expressed in quadratic form of the bus voltage, has been adopted. For the losses, the re-allocation of transmission losses to each generation bus has been used in the process of power flow calculation for obtaining the P/V curve. Case studies demonstrate the performance of the approach

Keywords

load (electric); losses; power system dynamic stability; power transmission; bus voltage; electric loads; power flow calculation; power transmission losses; power/voltage curve; precise P/V curve; quadratic form; transmission losses re-allocation; voltage dependency effect; voltage stability analysis; voltage-dependent load models;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings-

Publisher

iet

ISSN

1350-2360

Type

jour

DOI

10.1049/ip-gtd:20020258

Filename

1024182