Reduced model determining apparatus, contracted model determining method and reduced model determining program

摘要

PROBLEM TO BE SOLVED: To provide a contraction model determination device capable of determining a contraction model that can generate a fluctuation waveform at different accidents with accuracy.SOLUTION: A short circuit capacity parameter setting part 111 and a phase angle parameter setting part 113 sequentially set a parameter for determining a short circuit capacity and a phase angle of a power system model, for each power system model having a different parameter. A difference calculation part 112, for each accident case, calculates a pseudo interconnection line fluctuation waveform that is a fluctuation waveform in an interconnection line connecting between the power system model and a first power system, by using the set parameter, and calculates a difference between an interconnection line fluctuation waveform that is a fluctuation waveform in the interconnection line connecting between the first power system and the second power system, and the pseudo interconnection line fluctuation waveform, and adds the calculated differences for the respective accident cases. A selection part 114 and a contraction model determination part 130 determines the power system model having such a parameter that the addition result becomes the minimum as a contraction model for the second power system.