Corrective rescheduling for static voltage stability control

• Published in: International journal of electrical power & energy systems Vol. 27; no. 1; pp. 3 - 12
• Main Authors: Arya, L.D., Sakravdia, D.K., Kothari, D.P.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2005; Elsevier
• Subjects: Applied sciences; Disturbances. Regulation. Protection; Eigen sensitivities; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; Load flow Jacobian; Optimization; Power networks and lines; Voltage stability; Voltage stability; Load flow Jacobian; Optimization; Eigen sensitivities; Methodology; Optimization method; Eigenvalue; Scheduling; Closed form equation; Power system security; Voltage control; Implementation; Load flow; Bus system; Jacobian matrices; Reactive power control; Experimental result; Static conditions; Algorithm performance; Electrical network; Objective function; Lagrangian method
• ISSN: 0142-0615; 1879-3517
• DOI: 10.1016/j.ijepes.2004.07.005

This paper describes a technique for improving static voltage stability by rescheduling reactive power control variables. The algorithm is based on sensitivities of minimum eigen value with respect to reactive power control variables. Objective function selected is minimization of deviation of squares of reactive power control variables subject to desired increase in minimum eigen value of load flow Jacobian. Since minimum eigen value is system wise voltage stability index increase in load bus voltages as desired is also simultaneously observed. Using Lagrangian optimization technique closed form relations for corrections in reactive power control variables have been obtained. Developed methodology has been implemented on a 6-bus and 25 bus test systems.