Performance indexes for predicting voltage collapse: Final report

Technical Report · Sat Jul 01 04:00:00 EDT 1989

OSTI ID:5917553

Fischl, R

This report gives a methodology for evaluating the accuracy of voltage collapse criteria (such as, Voltage Collapse Proximity Indicator, Load Flow Feasibility Index, Steady State Stability Index, etc.) for predicting impending voltage collapse in power systems. The evaluation is done in the framework of the decision the operator makes and thus evaluates the risk of making the wrong decision. It is shown that for each voltage collapse criterion, one can quantify the error in the decision and determine the tradeoffs made between the probability of missing and false alarm of voltage collapse. To achieve this a set theoretic framework is established for the analysis of voltage collapse. This framework, called Voltage Security region, integrates both the steady-state and dynamic voltage collapse phenomena in a unified structure. The voltage security region framework is used to review various proposed voltage collapse criteria in a unified manner and evaluate their effectiveness (i.e., probability of miss and false alarm) in predicting voltage collapse. It is shown that at least two voltage collapse criteria are needed to predict impending voltage collapse: one for the steady-state phenomena and the other for the dynamic phenomena of voltage collapse. Finally, numerous examples are given to illustrate the concepts and the methodology. Most of the results are presented graphically to give a pictorial insight into the construction of the Voltage Security regions and the evaluation of the voltage collapse criteria. 43 refs., 64 figs., 10 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA); Drexel Univ., Philadelphia, PA (USA). Dept. of Electrical and Computer Engineering
• OSTI ID: 5917553
• Report Number(s): EPRI-EL-6461
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
CONTROL SYSTEMS
DECISION MAKING
DOCUMENT TYPES
ELECTRIC POWER INDUSTRY
INDUSTRY
MATHEMATICS
PERFORMANCE
POWER DISTRIBUTION SYSTEMS
PROGRESS REPORT
RELIABILITY
STATISTICS
STEADY-STATE CONDITIONS
VAR CONTROL SYSTEMS