| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a contraction program, by which a subsystem of electric power in which a motor and load are intermingled is contracted by a single-unit/single-load/three-branch method, the impedance of three-branches after contraction is computed by a computer, and input errors at such time are reduced. <P>SOLUTION: The contraction program for making a computer execute following steps wherein the computer calculates the impedance of the three-branches for the purpose of contracting the subsystem to a single-unit/single-load/three-branch form, which branches the branches into a Y type when viewed from a contracting point; of indicating an input form, computing a tidal current of each branch, computing complex phases by node, calculating the weighted averages of the complex phases at the nodes of each generator and the nodes of each load, computing the short-circuiting impedance at the contracting point node, and computing each impedance of the three-branches after contraction; a step of indicating the input form is provided with a column in which node numbers of an upper side and a lower side, the impedance, effective power of the generator, load electric power consumption, rated capacity of the generator and direct-axis transient reactance for each branch are input after relating these, as a state of the subsystem before contraction. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
