一种交流线路高阻接地与过载故障模拟装置

Abstract

本实用新型提供了一种交流线路高阻接地与过载故障模拟装置，包括220V交流源、开关、接地故障发生器、过载故障发生器、电压传感器、电流传感器、信号采集器、数据发送模块、数据接收模块和上位机所述交流220V源的输出端与所述开关的输入端通过零线N1、火线L1及地线G1电连接；所述开关的输出端分别与所述接地故障发生器、过载故障发生器的输入端通过零线N2、火线L2及地线G2电连接；所述电压传感器与所述零线N2、火线L2并联，所述电流传感器被所述电线L2穿过。本实用新型的装置可操作性强，可随时进行故障模拟且操作便捷，可以大大提高线路高阻接地故障模拟以及过载故障模拟的真实性与采集的故障数据的可信度。

Claims

1. An alternating current line high resistance ground and overload fault simulation apparatus, characterized by: The device comprises a 220V AC source, a switch, a ground fault generator, an overload fault generator, a voltage sensor, a current sensor, a signal collector, a data sending module, a data receiving module and a host computer. The output end of the AC 220V source is electrically connected with the input end of the switch through a zero line N1, a live line L1 and a ground line G1. The output end of the switch is electrically connected with the input end of the ground fault generator and the overload fault generator through a zero line N2, a live line L2 and a ground line G2. The voltage sensor is connected in parallel with the zero line N2 and the live line L2, and the current sensor is penetrated by the live line L2. The voltage sensor and the current sensor are electrically connected with the signal collector. The ground fault generator and the overload fault generator are electrically connected with the signal collector. The signal collector is electrically connected with the data sending module. The data receiving module is electrically connected with the host computer. The host computer is electrically connected with the ground fault generator and the overload fault generator, and is used for controlling the ground fault generator and the overload fault generator to work.

2. An AC line high resistance ground and overload fault simulation device according to claim 1, characterized in that: The switch is a 3P switch.

3. An AC line high resistance ground and overload fault simulation device according to claim 1, characterized in that: The ground fault generator comprises a first shielding cover, a first temperature collecting module, a controller, a contactor and first resistors. The first resistors and the contactors are at least two, and the number of the first resistors is the same as that of the contactors, and the first resistors and the contactors are in one-to-one correspondence. The first temperature collecting module, the controller, the contactor and the first resistors are arranged in the first shielding cover. The first end of the first resistor is electrically connected with the ground line G2, the second end of the first resistor is electrically connected with the first end of the contactor, and the second end of the contactor is electrically connected with the live line L2. The controller is electrically connected with the host computer, receives a control instruction sent by the host computer, and controls the contactor to close and break according to the control instruction. The first temperature collecting module is fixed to the upper inner wall of the first shielding cover, and is used for collecting the temperature of the first resistor at the moment of ground fault.

4. An AC line high resistance ground and overload fault simulation apparatus as recited in claim 1, wherein: The overload fault generator comprises a second shielding cover, an AC constant current source, a second temperature collecting module, second resistors, experimental wires, experimental wire fixing clamps, a first support and a second support. The AC constant current source, the second temperature collecting module, the second resistors, the experimental wires, the first support and the second support are arranged in the second shielding cover. The zero line N2, the live line L2 and the host computer are connected with the input end of the AC constant current source, and the output end of the AC constant current source is further connected with the second resistors and the experimental wires. The second temperature collecting module is in contact connection with the experimental wires, and is used for collecting the temperature of the experimental wires under overload condition. The second resistors are variable resistors, and are used as variable loads of the constant current source.

5. An AC line high resistance ground and overload fault simulation apparatus as recited in claim 1, wherein: The signal collector comprises a battery, a power supply circuit, a filter circuit, a level conversion circuit, an interface and a charging circuit. The interface comprises an interface A and an interface B. The charging circuit is electrically connected with the battery, and charges the battery. The battery is electrically connected with the input end of the power supply circuit. The output end of the power supply circuit is electrically connected with the filter circuit and the level conversion circuit respectively, and supplies power for the filter circuit and the level conversion circuit; The output end of the filter circuit is electrically connected with the level conversion circuit; The interface A is electrically connected with the voltage sensor, the current sensor and the temperature acquisition module, the interface A is electrically connected with the filter circuit, and the interface A is used for connecting the sensor signal into the signal collector; The interface B is electrically connected with the level conversion circuit, and the interface B is electrically connected with the data sending module, and is used for outputting the processed sensor signal into the data sending module.

6. An AC line high resistance ground and overload fault simulation apparatus as recited in claim 1, wherein: The data sending module and the data receiving module are wireless modules, and the data sending module and the data receiving module complete data transmission through a wireless communication mode.

7. An AC line high resistance ground and overload fault simulation apparatus as recited in claim 1, wherein: The temperature measurement mode of the first temperature acquisition module is a wireless temperature measurement mode.

8. An AC line high resistance ground and overload fault simulation apparatus as recited in claim 3, wherein: The materials of the first shielding cover and the second shielding cover are insulating and explosion-proof materials.

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