On-line voltage stability monitoring of large power systems

Abstract

An on-line tool developed for voltage stability analysis and enhancement (VSA&E) of largescale power systems is presented in this paper. The tool has several major functions related to voltage security assessment, load margin calculations, contingency analysis, fast identification of insecure contingencies and critical contingencies, development of preventive control against insecure contingencies and development of enhancement control for increasing load margins for critical contingencies. The parallel version of this tool currently handles on-line models of 20-000 buses with the contingency list in the order of thousand. Some analytical results behind this tool are described.

Integrating voltage stability assessment and enhancement into wide-area situational awareness based on international standards

“…We demonstrate the proposed framework for WASA communications through VSA&E application integrated into the WASA evaluation system. We select a VSE&E [6][7][8][9][10][11], which is one of the most powerful tools, from the crowd of other contenders.…”

“…Now, as power systems become more stressed and the penetration of renewable energies increases, system operators need to analyze voltage security of the systems based on actual online system operating conditions. Voltage stability assessment and enhancement (VSA&E) [6][7][8][9][10][11] is a key application for maintaining and enhancing voltage security of bulk power systems. Chiang [10,11] presented an online application for VSA&E of actual large-scale power systems.…”

“…Voltage stability assessment and enhancement (VSA&E) [6][7][8][9][10][11] is a key application for maintaining and enhancing voltage security of bulk power systems. Chiang [10,11] presented an online application for VSA&E of actual large-scale power systems. If the VSA&E is well integrated into WASA, it can provide operators with rapid, effective, and economically sound recommendations for control actions.…”

“…In addition, we present a WASA evaluation system including the concept of WASA brain in Section 3. Finally, in Section 4, the effectiveness and practicability of the VSA&E [6][7][8][9][10][11] integrated into WASA are demonstrated on the WASA evaluation system to verify the performance of the international standard-based WASA.…”

On-line voltage security assessment and control

“…Voltage Stability Assessment and Enhancement (VSA&E) [1][2][3][4][5][6][7][8][9][10] is a key application for maintaining and enhancing voltage security of bulk power systems. In today's control center, as power systems become more stressed and the penetration of renewable energies increases, system operators need to analyze voltage security of the systems based on actual operating conditions, contingency and stressing of the system.…”