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Direct-current power supply system standby instantaneous ground fault insulation monitoring system and method

A technology for DC power system and insulation monitoring, applied in power supply testing, electrical measurement, short-circuit testing, etc., can solve problems such as unreliable grounding faults in DC power systems, shorten the fault existence time, ensure safe and reliable operation, and improve safety Effect

Pending Publication Date: 2021-10-19
AKSU POWER SUPPLY COMPANY STATE GRID XINJIANG ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides an insulation monitoring system and monitoring method for an instantaneous ground fault in a DC power supply system, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the fault monitoring of the existing DC power supply system cannot detect unreliable ground faults due to ground faults. Faults, i.e. transient faults are monitored for the problem

Method used

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  • Direct-current power supply system standby instantaneous ground fault insulation monitoring system and method
  • Direct-current power supply system standby instantaneous ground fault insulation monitoring system and method
  • Direct-current power supply system standby instantaneous ground fault insulation monitoring system and method

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Embodiment 1

[0039] Embodiment 1, as attached figure 1 As shown, this embodiment discloses an insulation monitoring system for instantaneous ground faults in a DC power supply system, including a back-end control device, a back-end transmission device, multiple insulation monitoring hosts, multiple monitoring auxiliary machines, multiple line selection modules and A plurality of current sensing modules; the back-end transmission device includes a switch, a long-distance transmission module or a short-distance transmission module; the back-end control device is connected to the switch, and the switch is connected to each insulation monitoring host through a long-distance transmission module or a short-distance transmission module connection, the insulation monitoring host and monitoring auxiliary machines are connected in one-to-one correspondence, each monitoring auxiliary machine is connected to multiple line selection modules, and each line selection module is connected to multiple curren...

Embodiment 2

[0043] Embodiment 2, as attached figure 2 As shown, this embodiment discloses an insulation monitoring system for instantaneous ground faults in a DC power supply system, wherein the insulation monitoring host further includes a host master control unit, a voltage acquisition unit, a bus resistance adjustment unit, a host communication display unit, an alarm unit, and a host A power supply unit, the main control unit of the main engine is respectively connected with the voltage acquisition unit, the bus resistance adjustment unit, the alarm unit and the communication display unit of the main engine, and the power supply unit of the main engine supplies power for the insulation monitoring main engine.

[0044] In the above technical solution, the host power supply unit supplies power to the insulation monitoring host; in the present invention, the host power supply unit may include a first power conversion output module, an isolated power supply module and a second power conver...

Embodiment 3

[0056] Embodiment 3, as attached Figure 10 As shown, this embodiment discloses a DC power supply system standby instantaneous ground fault insulation monitoring system, wherein the monitoring auxiliary machine further includes the main control unit of the auxiliary machine, the communication display unit of the auxiliary machine, the storage unit of the auxiliary machine and the power supply unit of the auxiliary machine, and the auxiliary machine The main control unit of the machine is respectively connected with the storage unit of the auxiliary machine and the communication display unit of the auxiliary machine, and the power supply unit of the auxiliary machine supplies power for monitoring the auxiliary machine.

[0057] In the above technical solution, the monitoring auxiliary machine includes the main control unit of the auxiliary machine, the communication display unit of the auxiliary machine, the storage unit of the auxiliary machine and the power supply unit of the ...

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Abstract

The invention relates to the technical field of direct-current power supply system monitoring, and in particular relates to a direct-current power supply system standby instantaneous ground fault insulation monitoring system and method. The system comprises a rear-end control device, a rear-end transmission device, insulation monitoring hosts, monitoring auxiliary machines, and line selection modules. The rear-end control device is connected with a switch, the switch is connected with each insulation monitoring host through a long-distance transmission module or a short-distance transmission module, the insulation monitoring hosts and the monitoring auxiliary machines are connected in a one-to-one correspondence manner, each monitoring auxiliary machine is connected with the plurality of line selection modules, and each line selection module is connected with a plurality of current sensing modules. According to the invention, real-time monitoring, judgment and positioning of the insulation fault of a direct-current power supply system are realized, an instantaneous grounding fault (namely an unreliable grounding fault) can be effectively judged and positioned, a basis is provided for troubleshooting of all insulation fault points of the direct-current system, the fault existence time is shortened, the safety of the direct-current power supply system is improved, and safe and reliable operation of a power system is ensured.

Description

technical field [0001] The invention relates to the technical field of DC power system monitoring, and relates to an insulation monitoring system and a monitoring method for an instantaneous ground fault in a DC power system. Background technique [0002] The DC system is the power supply system for the secondary equipment of the substation. The DC system network of the substation is huge. The DC power supply system is designed as an ungrounded system to avoid ground faults forming a wrong circuit and causing protection malfunctions or refusal accidents. The existing DC power system insulation monitoring device and grounding finder are all aimed at permanent grounding faults. Unreliable grounding faults exist for a short time due to grounding faults. Existing equipment cannot effectively monitor and search, which brings extreme difficulties to power production and maintenance personnel. Big trouble. Contents of the invention [0003] The present invention provides an insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/40G01R31/52G01R31/14G01R31/12
CPCG01R31/40G01R31/52G01R31/14G01R31/1227
Inventor 杨浩杜占科李伟杨正戴晓非吴治勇杨计强张大宝艾则孜·巴克王洪新杨乐
Owner AKSU POWER SUPPLY COMPANY STATE GRID XINJIANG ELECTRIC POWER