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实用新型
CN202522638U 一种电网故障智能识别设备 失效 - 权利终止

一种电网故障智能识别设备
摘要：
本实用新型公开了一种电网故障智能识别设备，包括微处理器、与该微处理器分别连接的显示屏、键盘、第一滤波放大电路、第二滤波放大电路和过零检测电路、连接第一滤波放大电路的电流互感器、连接第二滤波放大电路的电压互感器以及一电压基准电路，其中：所述过零检测电路还分别与所述第一滤波放大电路以及第二滤波放大电路分别连接；所述第一滤波放大电路、第二滤波放大电路和过零检测电路分别连接所述电压基准电路。本实用新型能够自动记录故障前后的电量有效值，运行人员可以随时调出故障时段各电量信息，然后通过专家系统的比对、分析，就可以确定故障区域和故障的严重程度。
摘要（英）：

The utility model discloses a grid failure intelligent identification device, which comprises a microprocessor; a display screen, a keyboard, a first filter amplifying circuit, a second filter amplifying circuit and a zero-crossing detection circuit respectively connected with the microprocessor; a current transformer connected with the first filter amplifying circuit; a voltage transformer connected with the second filter amplifying circuit; and a voltage reference circuit. The zero-crossing detection circuit is respectively connected with the first filter amplifying circuit and the second filter amplifying circuit. The first filter amplifying circuit, the second filter amplifying circuit and the zero-crossing detection circuit are respectively connected with the voltage reference circuit. With the grid failure intelligent identification device, valid values of the electric quantity before and after the failure can be automatically recorded, the electric quantity information in the failure period can be called out at any time by an operator, and through systematic comparison and analysis of an expert, the failure area and the severity degree of the failure can be identified.

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