Insulation monitoring device with self-inspection and ground connection location functions

A technology of insulation monitoring device and function, applied in the direction of measuring device, fault location, measuring electricity, etc., can solve the problems of inability to locate the fault point, many components, poor on-site operating conditions, etc., to reduce the scope of manual troubleshooting, convenient Quickly find and filter out effects

Inactive Publication Date: 2019-09-06
STATE GRID LIAONING ELECTRIC POWER RES INST +3
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Problems solved by technology

Among the factors affecting the stability and reliability of the DC power system, the grounding fault is one of the main faults, and the DC load generally adopts the design principle of radiation power supply, the DC loop cables are widely distributed, there are many components, and the field operating conditions are poor. When two or more points of the system are grounded, it may cause the relay protection device and switch of the power trans

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  • Insulation monitoring device with self-inspection and ground connection location functions
  • Insulation monitoring device with self-inspection and ground connection location functions
  • Insulation monitoring device with self-inspection and ground connection location functions

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Embodiment Construction

[0030] In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0031] Such as figure 1 As shown, an insulation monitoring device capable of self-inspection with grounding location function includes a host, several detection modules, and several current transformers; the host is used to output characteristic signals to the on-site DC system to detect whether there is a ground fault in the on-site DC system, And output the self-test signal to the current transformer to detect whether the current transformer is working normally; the detection module is used to collect the characteristic signal or self-test signal induced by the current transformer to upload to the host for processing;

[0032] The current transformer is installed on the feeder line of the on-site DC system, and multiple current transformers are installed at different positions of each branch in t...

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Abstract

The invention relates to the technical field of electric power detection, in particular to an insulation monitoring device with self-inspection and ground connection location functions. According to the insulation monitoring device, a host is connected with multiple detection modules and each detection module is connected with 16 current transformers, so that the need of long haul communication due to different protection chambers in the field is met; meanwhile, current transformers can be additionally arranged at different positions of the same feeder line, the host judges ground fault pointpositions of a field direct current system according to a signal situation that whether the current transformers at different positions are detected or not, so that an automatic precise location function when a ground fault occurs is realized, a manual troubleshooting range is shortened, and a fault point can be conveniently and quickly found; besides, the device performs self-inspection on all the current transformers regularly everyday, whether the current transformers are normal or not is monitored, and abnormal current transformers are displayed by virtue of an LCD display unit.

Description

technical field [0001] The invention relates to the technical field of electric power detection, in particular to an insulation monitoring device capable of self-inspection with a grounding and positioning function. Background technique [0002] In the power system, the DC power system is used in hydropower, thermal power plants, and various substations. The DC system is mainly composed of battery packs, charging devices, DC feeder panels, DC power distribution cabinets, DC power monitoring devices, and DC branch feeders. The DC power system is a system that provides power for protection, and its stability and reliability directly affect the working conditions. Among the factors affecting the stability and reliability of the DC power supply system, the ground fault is one of the main faults, and the DC load generally adopts the design principle of radiation power supply, the DC loop cables are widely distributed, there are many components, and the on-site operating condition...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/08G01R31/00G01R35/02
CPCG01R31/085G01R31/00G01R35/02G01R31/50
Inventor 朱钰王飞徐玉凤李永祥柴若愚刘爱民吴蒙田丰源张武洋蔡玉朋
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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