Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1989-10-19
1990-11-27
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 78, 323234, 307 31, 364492, 364495, H02J 300
Patent
active
049741403
ABSTRACT:
A voltage stability discriminating system for a power system is disclosed for calculating a multiple load flow solution relating to a voltage stability discrimination for a power system in which the voltage stability can be discriminated fast and accurately due to the fact that the voltage stability discrimination system of the power system is constructed such that the multiple load flow solution is estimated in advance during a calculation process of the load flow calculating means. For example, the load flow calculation is made through the N-R method of a rectangular coordinates system, and after the first solution is converged and the first load flow solution (an output value of the load flow calculation means) is determined, the estimated value of the above-mentioned multiple load flow solution is examined by the load flow solution determining means so as to determine the first load flow solution as the load flow solution, or the estimated value of the above-mentioned multiple load flow solution is applied and the load flow solution is determined by performing the load flow calculation.
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Tamura et al., "A Method for Finding Multiple Load-Flow Solutions for General Power Systems", IEEE paper No. A80 043-0, Presented at IEEE PES Winter Meeting, New York, N.Y., Feb. 3-8, 1980, pp. 1-9.
Iwamoto et al., "A Load Flow Calculation Method for Ill-Conditioned Power Systems", IEEE Transactions on Power Apparatus and Systems, vol. PAS-100, No. 4, Apr. 1981, pp. 1736-1741.
Iba Kenji
Suzuki Hiroshi
Mitsubishi Denki & Kabushiki Kaisha
Wong Peter S.
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