CN215340134U

CN215340134U - Passive wireless zinc oxide arrester monitor

Info

Publication number: CN215340134U
Application number: CN202121775790.2U
Authority: CN
Inventors: 黎文安
Original assignee: Wuhan Landsky Intelligence Technology Co ltd
Current assignee: Wuhan Landsky Intelligence Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-12-28
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a passive wireless zinc oxide arrester monitor, wherein two ends of the monitor are respectively used for connecting a zinc oxide arrester and a grounding wire, and the monitor comprises a power module, an analog circuit power supply control module, a leakage current induction module, a lightning stroke induction module, an ADC (analog to digital converter) data acquisition and conversion module, a wireless communication module and a CPU (central processing unit) module, wherein the power module comprises an electric field induction electricity-taking sub module and a CT electricity-taking sub module which are arranged in parallel and used for supplying power to the ADC data acquisition and conversion module, the wireless communication module and the CPU module after voltage detection, the analog circuit power supply control module is used for controlling the on-off of the power module and outputting specified voltage, and the leakage current induction module, the lightning stroke induction module, the ADC data acquisition and conversion module and the wireless communication module are all connected with the CPU module. The zinc oxide arrester does not need an external power supply, overcomes the defects of the traditional monitor, and has the advantages of wide application range, high safety performance and strong practicability.

Description

Passive wireless zinc oxide arrester monitor

Technical Field

The utility model relates to the technical field of zinc oxide arresters, in particular to a passive wireless zinc oxide arrester monitor.

Background

The zinc oxide arrester is a main device for limiting lightning overvoltage and operating over-voltage of a power system and protecting power equipment from overvoltage damage, is widely applied to overvoltage protection devices of the power system, and has important influence on the safety and reliability of a power grid due to the technical level. Although the manufacturing process and detection technology of the zinc oxide arrester have been greatly improved and improved, many faults and accidents still occur in the actual operation process.

Once the zinc oxide arrester fails and does not timely quit operation, explosion accidents can occur, electric power system accidents are caused, and serious threats are brought to the safe operation of the electric power system.

The traditional detection method of the power system for the zinc oxide arrester usually adopts a preventive test mode, and generally takes an annual period as a period to take the arrester out of operation and perform power failure detection. From the economic point of view analysis, because the quantity of arrester is numerous, all need to invest in a large amount of manpower and materials every time detecting, and still need the power failure, can cause very big direct or indirect economic loss. From the technical point of view, since the preventive test is greatly different from the conditions, environments and influence factors of the actual operation of the equipment, and the preventive test needs to be regularly performed, it is difficult to accurately find and judge the defect or failure of the lightning arrester in time. As an important component for ensuring the safe operation of the power system, the zinc oxide arrester urgently needs an online monitoring technology and device capable of timely and accurately reflecting the working condition of the zinc oxide arrester.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems, the utility model provides a passive wireless zinc oxide arrester monitor, the zinc oxide arrester does not need an external power supply, electric field energy is converted into electric energy to supply power for internal equipment in two modes of an electric field induction power-taking electronic module and a CT power-taking electronic module, the defects of the traditional monitor are overcome, multiple monitoring of high-voltage line leakage current, lightning stroke frequency and the like can be realized, the application range is wide, the safety performance is high, and the practicability is high.

A passive wireless zinc oxide arrester monitor, two ends of the monitor are respectively used for connecting a zinc oxide arrester and a grounding wire, comprises a power module, an analog circuit power control module, a leakage current induction module, a lightning stroke induction module, an ADC data acquisition and conversion module, a wireless communication module and a CPU module, the power supply module comprises an electric field induction electricity getting sub-module and a CT electricity getting sub-module which are arranged in parallel and used for supplying power to the ADC data acquisition and conversion module, the wireless communication module and the CPU module after voltage detection, the analog circuit power supply control module is used for controlling the on-off of the power supply module and outputting specified voltage, the leakage current sensing module, the lightning stroke sensing module, the ADC data acquisition and conversion module and the wireless communication module are all connected with the CPU module, and the CPU module is further connected with a watchdog module and a data storage module.

Preferably, the leakage current sensing module includes a leakage current measuring coil, and the leakage current measuring coil receives the leakage current signal and then transfers the analog signal to the ADC data acquisition and conversion module after current-voltage conversion, low-pass filtering and multi-stage amplification.

Preferably, the lightning stroke induction module comprises a lightning stroke pulse measuring coil, and the lightning stroke pulse measuring coil directly transmits a signal to the CPU module after receiving a lightning stroke trigger signal and then performing pulse shaping, pulse threshold comparison, and pulse trigger output.

Preferably, the monitor is a high voltage resistant insulating housing.

The utility model has the beneficial effects that:

this zinc oxide arrester need not external power supply, gets electric module, CT through electric field induction and gets electric module two kinds of modes and convert electric field energy into the electric energy and supply power for interior equipment, has overcome the shortcoming of traditional monitor, can realize that high-voltage line reveals multiple monitoring such as electric current, the number of times of suffering from thunderbolt, and the range of application is wide, and the security performance is high, and the practicality is strong.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a circuit diagram of the CPU module, the watchdog module, and the data storage module.

Fig. 3 is a circuit diagram of the ADC data acquisition conversion module.

Fig. 4 is a circuit diagram of a wireless communication module.

Fig. 5 is a circuit diagram of a leakage current sensing module.

FIG. 6 is a circuit diagram of a lightning strike sensing module.

Fig. 7 is a circuit diagram of a power module.

Fig. 8 is an analog circuit power control module.

Detailed Description

The technical scheme of the utility model is clearly and completely described below by combining the attached drawings of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1 to 8, two ends of the monitor are respectively used for connecting a zinc oxide arrester and a ground wire, and the monitor comprises a power module, an analog circuit power control module, a leakage current sensing module, a lightning stroke sensing module, an ADC data acquisition and conversion module, a wireless communication module and a CPU module, wherein the power module comprises an electric field induction electricity-taking module and a CT electricity-taking module, the electric field induction electricity-taking module and the CT electricity-taking module are arranged in parallel and used for supplying power to the ADC data acquisition and conversion module, the wireless communication module and the CPU module after voltage detection, the analog circuit power control module is used for controlling the power module to be switched on and off and outputting specified voltage, and the leakage current sensing module, the lightning stroke sensing module, the ADC data acquisition and conversion module and the wireless communication module are all connected with the CPU module, the CPU module is also connected with a watchdog module and a data storage module.

In this embodiment, the leakage current sensing module includes a leakage current measuring coil, and the leakage current measuring coil transmits the analog signal to the ADC data acquisition and conversion module after receiving the leakage current signal and performing current-voltage conversion, low-pass filtering, and multi-stage amplification.

In this embodiment, the lightning stroke induction module includes a lightning stroke pulse measurement coil, and the lightning stroke pulse measurement coil directly transmits a signal to the CPU module after receiving a lightning stroke trigger signal and after pulse shaping, pulse threshold comparison, and pulse trigger output.

In this embodiment, the monitor employs a high voltage resistant insulating housing.

This zinc oxide arrester need not external power supply, get the electric module through electric field induction, CT gets electric module piece dual mode and converts the electric energy into for the internal plant power supply with the electric energy, can store certain electric energy through electric capacity simultaneously, because ADC data acquisition conversion module, wireless communication module and CPU module power consumption are extremely low, the long-term operation requirement of its equipment can be satisfied to the electric quantity of electric capacity storage, can effectively avoid leading to data can not in time transmit for external data winding and unwinding devices scheduling problem because of the electric energy supply is not enough, guarantee that the monitor is in operating condition constantly, the shortcoming of traditional monitor has been overcome to this zinc oxide arrester, can realize the high-voltage line and reveal the electric current, suffer multiple monitoring such as thunderbolt number of times, the range of application is wide, the security performance is high, therefore, the clothes hanger is strong in practicability.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a passive wireless zinc oxide arrester monitor, the both ends of monitor are used for connecting zinc oxide arrester and earth connection respectively, its characterized in that: including power module, analog circuit power control module, leakage current induction module, thunderbolt induction module, ADC data acquisition conversion module, wireless communication module and CPU module, power module includes that electric field induction gets electric submodule piece, CT and gets electric submodule piece, electric field induction gets electric submodule piece and CT and gets the parallelly connected setting of electric submodule piece, is used for ADC data acquisition conversion module, wireless communication module and CPU module power supply after voltage detection, analog circuit power control module is used for controlling power module's break-make and output specified voltage, leakage current induction module, thunderbolt induction module, ADC data acquisition conversion module and wireless communication module all are connected with the CPU module, still be connected with watchdog module and data storage module on the CPU module.

2. The zinc oxide arrester monitor of claim 1 wherein: the leakage current induction module comprises a leakage current measuring coil, and the leakage current measuring coil receives a leakage current signal and then transmits an analog signal to the ADC data acquisition and conversion module after current-voltage conversion, low-pass filtering and multi-stage amplification.

3. The zinc oxide arrester monitor of claim 1 wherein: the lightning stroke induction module comprises a lightning stroke pulse measuring coil, and the lightning stroke pulse measuring coil directly transmits signals to the CPU module after receiving a lightning stroke trigger signal and then performing pulse shaping, pulse threshold comparison and pulse trigger output.

4. The zinc oxide arrester monitor of claim 1 wherein: the monitor adopts a high-voltage resistant insulating shell.