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Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof

A technology of power distribution switch and monitoring device, applied in the direction of measuring device, instrument, measuring electricity, etc., can solve the problems of untimely monitoring, degradation of insulation characteristics, inaccurate judgment of the working state of arrester, etc., to achieve efficient online monitoring and ensure safe operation. Effect

Inactive Publication Date: 2016-03-02
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research has found that the total leakage current value of the oxide arrester cannot fully reflect the insulation condition of the zinc oxide arrester; for example, when the peak value of the resistive current increases from 50uA to 250uA, the increase of the full current may only be a few percent , and the peak value of the resistive leakage current is an important indicator that causes the heat of the arrester to reduce its insulation characteristics, and the resistive current cannot be obtained directly, so there are defects such as untimely monitoring and inappropriate judgment of the working status of the arrester.

Method used

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  • Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof
  • Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0033] like figure 1 As shown, an online monitoring device for arrester performance in power distribution switchgear, including a microprocessor circuit, a temperature signal conditioning circuit, a current signal conditioning circuit, and a cabinet temperature signal conditioning circuit connected to the microprocessor circuit in one-way communication , a display circuit, a keyboard circuit and a power supply circuit, a communication interface circuit connected to the microprocessor circuit in two-way communication, and a temperature sensor, a current sensor and a temperature sensor in the cabinet.

[0034] The temperature sensor is connected to the microprocessor circuit by one-way communication through the temperature signal conditioning circuit, the current sensor is connected to the microprocessor circuit by one-way communication on the current signal c...

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Abstract

The invention discloses a performance on-line monitoring device for a power distribution switch cabinet lightning arrester and a monitoring method thereof. The monitoring device comprises a microprocessor circuit, temperature signal conditioning circuits, current signal conditioning circuits, an in-cabinet temperature signal conditioning circuit, a display circuit, a keyboard circuit, a power supply circuit, a communication interface circuit in bidirectional communication connection with the microprocessor circuit, temperature sensors, current sensors and an in-cabinet temperature sensor; the temperature signal conditioning circuits, the current signal conditioning circuits, the in-cabinet temperature signal conditioning circuit, the display circuit, the keyboard circuit and the power supply circuit are in one-way communication connection with the microprocessor circuit; the temperature sensors and the current sensors are arranged on a lightning arrester in a power distribution switch cabinet, and the in-cabinet temperature sensor is arranged in the power distribution switch cabinet; and the microprocessor circuit performs on-line monitoring and a performance judgment of the lightning arrester according to acquired monitoring data. Accurate, timely and efficient on-line monitoring of performance of the lightning arrester of the power distribution switch cabinet is achieved, and, through utilization of a total leakage current of the lightning arrester and a combination with temperature data of a body of the lightning arrester, whether a fault occurs in the lightning arrester is comprehensively determined, so safe operation of switch equipment is ensured.

Description

technical field [0001] The invention relates to a monitoring device and a monitoring method, in particular to an on-line monitoring device for arrester performance of a power distribution switch cabinet and a monitoring method thereof, belonging to the technical field of safe operation monitoring of switchgear. Background technique [0002] Power generation (substation) substations and transmission lines are high-incidence areas of lightning disasters, and whether it is direct lightning or induction lightning, it may not only cause damage to the facilities in the area, but also bring impact to external equipment connected to it (or even similar) . Therefore, before the high-voltage lines of the power system are sent to the user's own transformer, a complete set of lightning protection devices should be installed. [0003] At present, the oxide arrester is widely implemented in our country, which obviously improves the safety of the power system and produces huge economic be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 宋佳佳张金波王军王恒鲁帅吴纵
Owner HOHAI UNIV CHANGZHOU
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