Fast contingency screening for voltage stability analysis considering both SNBs and SIBs

Author(s)

Neves, Lucas Sales ; Costa Alberto, Luis Fernando ; Chiang, Hsiao-Dong

• Document type: Journal article
• Source: Electric Power Systems Research; v. 213, p. 6-pg., 2022-08-13.

Abstract

Polynomial extrapolation usually leads to crude approximations of the so-called nose curves due to the nonlinear nature of power system operational limits. In particular, these polynomial approximations fail to obtain estimates of the voltage stability margin when the system is subject to structure-induced bifurcations. This paper proposes smoothing out power flow equations to deal with structure-induced bifurcations and verifies the validity of a quadratic approximation of a smooth nose curve in estimating load margin for contingency screening and ranking in voltage stability analysis. Tests of the proposed method in large power systems revealed that an appropriate smooth power flow model can indeed result in better estimates of the exact contingency ranking as compared to the estimates obtained with the original power flow equations. (AU)

• FAPESP's process: 14/50851-0 - INCT 2014: National Institute of Science and Technology for Cooperative Autonomous Systems Applied in Security and Environment
• Grantee: Marco Henrique Terra
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/20104-9 - Wide-area monitoring, dynamic security analysis and control of modern power system networks
• Grantee: Luís Fernando Costa Alberto
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 18/24815-7 - Fast methods for selection of preventive and corrective controls in electric power systems considering load uncertainties
• Grantee: Lucas Sales Neves
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)