Multiple Contingency Selection for Transmission Reliability and Transfer Capability Studies

• Published in: Electric machines and power systems 1992-05, Vol.20 (3), p.223-237
• Main Authors: Schlueter, R. A., Costi, A., Sekerke, J., Burnett, K.
• Format: Article
• Language: English
• Subjects: 240100 - Power Systems- (1990-); 240200 - Power System Networks, Transmission & Distribution- (1990-); 990200 - Mathematics & Computers; Applied sciences; B CODES; COMPUTER CODES; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; Operation. Load control. Reliability; PERFORMANCE TESTING; Power networks and lines; POWER SYSTEMS; POWER TRANSMISSION; POWER TRANSMISSION AND DISTRIBUTION; RELIABILITY; STRESSES; TESTING; THERMAL STRESSES
• ISSN: 0731-356X; 1521-0502
• DOI: 10.1080/07313569208909587

This paper develops a multiple contingency selection procedure that can identify the single contingencies that cause thermal stress on the same branch or branches and, thereby, produce critical multiple contingencies. This multiple contingency selection procedure is required if enumerative transmission reliability [4] is to be successfully applied since all critical single and multiple contingencies can be identified without excessive computation or false alarm or misclassification problems. The multiple contingency selection is accomplished by determining a list of contingencies for each branch that have: (a) apparent power flows that exceed αxl00% of the thermal limit and (b) apparent power flow changes that exceed βxl00% of the thermal limit. A branch contingency measure is used to rank these single contingencies. Combination of the single contingencies taken from any branch's list of contingencies would produce multiple critical contingencies with thermal overloads on that branch assuming superposition holds. The BOUNSM computer program that provides the information for the enumerati ve transmission reliability program [4] also provides the information required to perform a transfer capability study [3]. A monitored branch measure, which is the sum of the branch contingency measures for a particular branch, would identify the branches, paths, and interfaces that are most insecure for an anticipated transfer and must be specified to run a transfer capability study. The combination of branch's list of contingencies for each of these branches, paths, and interfaces would be the list of contingencies that needs to be specified to perform a transfer capability study. The monitored branch and branch contingency measures are computed using a BOUNSM program for the contingencies simulated using a matrix compensation method by a Multiple Contingency Load Fow. The combination of the BOUNSM and Multiple Contingency Load Flow is very efficient. The programs are tested on a 1689 bus, 3127 branch system.