公开(公告)号：US4812729A

公开(公告)日：1989-03-14

申请号：US84805

申请日：1987-08-13

申请人： Akio Ito ,  Hidenori Sawa ,  Hiroshi Sugisaka ,  Shigeaki Hayashi ,  Hiroto Nakagawa ,  Yasuteru Oono ,  Eiji Haraguchi

发明人： Akio Ito ,  Hidenori Sawa ,  Hiroshi Sugisaka ,  Shigeaki Hayashi ,  Hiroto Nakagawa ,  Yasuteru Oono ,  Eiji Haraguchi

IPC分类号： H02H7/12 ,  H02H7/125 ,  H02P9/42 ,  H02P5/40

CPC分类号： H02H7/1216 ,  H02P9/007 ,  H02P9/10 ,  H02H7/1255

摘要： 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.

摘要翻译： 公开了一种用于次级励磁型变速交流发电机/电动机的保护装置，其具有连接到电力系统的初级绕组和每个相位由独立的功率转换器单元交流激励的次级绕组。 保护装置被设置为检测包括在AC发电机/电动机的次级绕组的每个相出现的过电压和过电流中的至少一个的电气事件，以确定检测到的电气事件是否满足预定条件并关闭， 当检测到相对于次级绕组中的任一阶段的电气事件被确定为满足预定条件时，连接在次级绕组的相应相位上的开关电路。

公开(公告)号：US4742288A

公开(公告)日：1988-05-03

申请号：US915392

申请日：1986-10-06

申请人： Osamu Sugimoto ,  Tadaatsu Kato ,  Hidenori Sawa ,  Akio Ito ,  Hiroshi Sugisaka ,  Haruo Nohara ,  Masuo Goto

发明人： Osamu Sugimoto ,  Tadaatsu Kato ,  Hidenori Sawa ,  Akio Ito ,  Hiroshi Sugisaka ,  Haruo Nohara ,  Masuo Goto

IPC分类号： H02J3/40 ,  H02P9/10 ,  H02P1/26

CPC分类号： H02J3/40 ,  H02P9/10 ,  H02P2101/10

摘要： A control system for controlling the load of an AC motor/generator of secondary AC excitation type connected to a power system in parallel to at least a synchronous machine. The AC motor/generator has the secondary excitation winding thereof controlled in the amount of excitation so as to generate an output in accordance with an external output command. In the case of variation of power flow between the power system and the synchronous machine, the output command is corrected in accordance with the variation, and the amount of the secondary excitation is controlled by the corrected output command, whereby the variation of power flow between the power system and the synchronous machine is absorbed by the AC motor/generator thereby to prevent the synchronous machine from stepping out.

摘要翻译： 一种用于控制与至少同步电机并行连接到电力系统的二次交流励磁型交流电动机/发电机的负载的控制系统。 交流电动机/发电机的次级励磁绕组被控制在励磁量中，以便根据外部输出指令产生输出。 在电力系统和同步电机之间的功率流的变化的情况下，根据变化来校正输出命令，并且通过校正的输出命令控制次级激励的量，由此， 电力系统和同步电机被交流电动机/发电机吸收，从而防止同步电机走出。