A study on efficient calculation of effective reactive power reserves using sensitivity analysis

Moonsung Bae, Byong Jun Lee

Research output: Contribution to journalArticle

Abstract

In recent academic and industrial circles of the Republic of Korea, the securement of available reactive power reserve against the line faults is at issue. Thus, simulations have been performed for the securing of effective reactive power reserve (effective Q) to prepare for the line faults and improve reactive power monitoring and control methods. That is, a research has been conducted for the fast-decoupled Newton-Raphson method. In this study, a method that distinguishes source and sink regions to carry out faster provision of information in the event of line fault has been proposed. This method can perform quantification with the formula that calculates voltage variations in the line flow. The line flow and voltage changes can be easily induced by the power flow calculation performed every second in the operation system. It is expected that the proposed method will be able to contribute to securement of power system stability by securing efficient reactive power. Also, the proposed method will be able to contribute to prepare against contingencies effectively. It is not easy to prepare quickly for the situation where voltage drops rapidly due to the exhaustion of reactive power source by observing voltage information only. This paper’s simulation was performed on the large scale Korean power system in steady state.

Original languageEnglish
Pages (from-to)1689-1696
Number of pages8
JournalJournal of Electrical Engineering and Technology
Volume12
Issue number5
DOIs
Publication statusPublished - 2017 Sep 1

Keywords

  • Line flow sensitivity
  • Power system monitoring
  • Reactive power reserve
  • Reactive power sensitivity
  • Voltage collapse

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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