초록 ▼

There is disclosed a protecting apparatus for a secondary excitation type variable speed AC generator/motor having a primary winding connected to an electric power system and a secondary winding each phase of which is AC excited by an independent power converter unit. The protecting apparatus is arr

There is disclosed a protecting apparatus for a secondary excitation type variable speed AC generator/motor having a primary winding connected to an electric power system and a secondary winding each phase of which is AC excited by an independent power converter unit. The protecting apparatus is arranged to detect an electrical event which includes at least one of an overvoltage and overcurrent appearing at each phase of the secondary winding of the AC generator/motor, to decide whether the detected electrical event meets a predetermined condition and to close, when the electrical event detected in respect to any of phases of the secondary winding is decided as meeting the predetermined condition, a switch circuit connected in the corresponding phase of the secondary winding.

대표청구항 ▼

A protecting apparatus for a secondary excitation type variable speed AC generator/motor having a primary winding connected to an electric power system and a secondary winding each phase of which is AC excited by an independent power converter unit, said protecting apparatus comprising: means for de

A protecting apparatus for a secondary excitation type variable speed AC generator/motor having a primary winding connected to an electric power system and a secondary winding each phase of which is AC excited by an independent power converter unit, said protecting apparatus comprising: means for detecting an electrical event which includes at least one of overvoltge and overcurrent appearing at any phase of the secondary winding of said AC generator/motor; a switch circuit connected in each phase of the secondary winding of said AC generator/motor; means for deciding whether said detected electrical event meets a predetermined condition; and means for closing, when said electrical event detected in any phase of the secondary winding is decided as meeting said predetermined condition, said switch circuit connected in the corresponding phase of the secondary winding.