Substation DC system mobile insulation monitor
An insulation monitor and DC system technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problems of loss of insulation monitoring device of DC power supply, hidden dangers of safe operation of DC power supply, etc., to save power loss and high degree of equipment automation , easy to move
Active Publication Date: 2017-07-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0002] At present, the domestic DC power insulation monitoring devices are all fixed, and can only be installed in a certain substation to work. If the insulation monitoring device fails, during the troubleshooting of the monitoring device, the DC power supply of the substation loses the insulation monitoring device at this time. The safe operation of DC power supply brings hidden dangers
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Embodiment 1
[0025] A mobile insulation monitor of a substation DC system includes a monitoring host, a data acquisition device and a mobile sensor, wherein the monitoring host includes a bridge circuit, a protection circuit, an ultra-low frequency signal generator, an analog-to-digital conversion circuit, a micro Processor, alarm device, display device, communication module, photoelectric isolation device, the protection circuit realizes bus monitoring. After the bridge circuit detects that the bus is grounded, the protection circuit controls the operation of the ultra-low frequency signal generator and synchronously outputs the synchronization signal to the data The acquisition device, the bridge circuit includes a balanced bridge detection circuit and an unbalanced bridge detection circuit; the protection circuit is connected with the microprocessor by triggering and controlling the ultra-low frequency signal generator, and the bridge circuit is connected with the microprocessor through a...
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The invention discloses a mobile insulation monitoring instrument for substation DC system, which includes a monitoring host, a data acquisition device and a mobile sensor. The monitoring host includes a bridge circuit, a protection circuit, an ultra-low frequency signal generator, a modulus Conversion circuit, microprocessor, alarm device, display device, communication module, photoelectric isolation device. The data acquisition device includes more than one group of connected analog selection switches, amplifiers, band-pass filters, phase comparators, filters, analog-to-digital conversion circuits and microprocessors. The mobile insulation monitoring instrument of the DC system of the substation of the present invention has the characteristics of being mobile, and can detect multiple circuits at the same time, and the automation program is highly adaptable, and can perform supervisory inspection on the original DC system bridge of the substation, but Detect the impedance of the original bridge, and set the original circuit through the setting menu.
Description
technical field [0001] The invention relates to an insulation monitor, in particular to a mobile insulation monitor of a direct current system of a substation. Background technique [0002] At present, the domestic DC power insulation monitoring devices are all fixed and can only be installed in a certain substation to work. If the insulation monitoring device fails, during the troubleshooting of the monitoring device, the DC power supply of the substation loses the insulation monitoring device. The safe operation of the DC power supply brings hidden dangers. In order to ensure the safe operation of the power system, a set of general DC insulation monitoring equipment must be replaced in time to monitor the DC system insulation. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a mobile insulation monitoring system for the DC system of the substation, which is suitable for various DC sys...
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IPC IPC(8): G01R31/12G01R31/02G01R19/25
Inventor 陈雅云林建勤郭建钊苏祖礼李祖选许灵通关少锋
Owner STATE GRID CORP OF CHINA