| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for evaluating stability of a system voltage taking into consideration the transitional dynamic characteristics of a load, without having to execute numerical analysis simulation that require convergence calculation, and to provide a stability evaluation program. <P>SOLUTION: A power system voltage stability evaluation method is constituted so that the power system having a plurality of the loads is contracted to one load system, having a load in which one simulated induction motor and one simulated constant impedance are connected in parallel, and voltage stability of the one load system is considered as the voltage stability of the system before the contraction. The power system voltage stability evaluation method is constituted of a data input process, in which a data input means receives input of numerical data of elements constituting the one load system, an electrical input calculation process, in which an electrical input calculation means reads in a calculation formula stored in a storage device so as to calculate the electrical input of the induction motor, by substituting the numerical data into the calculation formula; a mechanical output calculation process, in which a mechanical output calculation means reads a calculation formula stored in the storage device so as to calculate the mechanical output of the induction motor by substituting the numerical data into the calculation formula; a stability evaluation process, in which a stability evaluation means evaluates the voltage stability by comparing the electrical input of the induction motor with the mechanical output of the induction motor on a torque-speed plane; and a result output process in which a result output means outputs the result of the stability evaluation. <P>COPYRIGHT: (C)2007,JPO&INPIT |
