| 摘要 |
PURPOSE:To simply analyze at a high speed fluctuation without deterioration of accuracy by utilizing a new synchronous machine model. CONSTITUTION:A synchronous machine model is expressed with a symmetrical positive phase equivalent circuit, an opposite phase equivalent circuit and a zero-phase equivalent circuit, an inductance of the positive phase equivalent circuit is expressed with a time parameter, an inductance of opposite phase, zero-phase equivalent circuit is expressed by an inverse phase, zero-phase inductance and a symmetrical fault current is obtained by an equivalent circuit structure for fault analysis in the normal condition for the symmetrical equivalent circuit. This symmetrical fault current is converted into 2-axis current with a coordinate converting means, a 2-axis magnetic flux is calculated from this 2-axis current and apparatus constant, internal phase angle and voltage before generation of fault of the synchronous apparatus, an electrical momentary output torque is obtained from the 2-axis current and 2-axis magnetic flux and fluctuation analysis is performed from the fluctuation equation by utilizing such torque. |
