公开(公告)号：US5945813A

公开(公告)日：1999-08-31

申请号：US62731

申请日：1998-04-20

申请人： Kouji Kondou ,  Jun Motohashi ,  Chikashi Nakazawa

发明人： Kouji Kondou ,  Jun Motohashi ,  Chikashi Nakazawa

IPC分类号： H02J3/24 ,  H02J3/38 ,  G05F1/70

CPC分类号： H02J3/24 ,  H02J3/38

摘要： The invention is directed to an apparatus for detecting if a distributed power supply is switched from cooperation with another power system to isolated or single operation. The distributed power supply includes a synchronous generator and possibly also another power source such as an induction generator. The single operation detecting apparatus includes a frequency detector connected to a line system of a customer, reactive power regulating equipment connected to the distributed power supply, a fluctuation signal generator for providing periodic small fluctuations to a reactive power setter of the reactive power regulating equipment, and a single operation signal generator for monitoring the output of the frequency detector to output a single operation signal when the monitored output deviates from a range between allowable upper and lower limits around a reference frequency. It is possible to detect the isolated or single operation mode by actively disturbing the balance between the energy generated by the distributed power supply and the power consumed by the distributed power supply, when the distributed power supply disconnected from the cooperation with power system.

摘要翻译： 本发明涉及一种用于检测分布式电源是否从与另一电力系统的协作切换到隔离或单独操作的装置。 分布式电源包括同步发电机，还可能包括诸如感应发电机的另一电源。 单个操作检测装置包括连接到客户的线路系统的频率检测器，连接到分布式电源的无功功率调节设备，用于向无功功率调节设备的无功功率设定器提供周期性小的波动的波动信号发生器， 以及单个操作信号发生器，用于当所监视的输出偏离围绕参考频率的允许上限和下限之间的范围时，监视频率检测器的输出以输出单个操作信号。 通过主动干扰分布式电源产生的能量与分布式电源消耗的能量之间的平衡，当分布式电源与电力系统的配合断开时，可以检测到隔离或单一运行模式。