CN201780328U

CN201780328U - On-line monitoring device for wireless transmission lightning arrester

Info

Publication number: CN201780328U
Application number: CN2010205071693U
Authority: CN
Inventors: 万征
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-03-30
Anticipated expiration: 2020-08-20

Abstract

The utility model discloses an on-line monitoring device for an wireless transmission lightning arrester, which comprises a plurality of leakage current and counter detection nodes, a leakage current sampling circuit, a counter sampling circuit and a wireless RF transceiver are arranged in each leakage current and counter detection node, the leakage current and counter detection nodes are in wireless communication with a Zigbee wireless sensor network module through the wireless RF transceivers, and the Zigbee wireless sensor network module is communicated with a collecting terminal which is communicated with a host computer.

Description

Wireless transmission lightning arrester on-Line Monitor Device

Technical field

The utility model relates to the on-line monitoring system field, is specially wireless transmission lightning arrester on-Line Monitor Device.

Background technology

The lightning arrester status monitoring is the important component part that the state to lightning arrester overhauls, and lightning arrester is comparatively expensive equipment, if because of lightning arrester breaks down, its influence that electric substation is caused is very serious.Yet at present the lightning arrester on-line monitoring by instrument in the restriction that is subjected to electric substation's hyperbaric environment, do not possess signal transfer functions, can only field observation, and audit function is single, the detected leakage current of equipment, mode with meter reading offers the user, because equipment is installed in the below of the outdoor lightning arrester of electric substation, certain height is arranged, the user is difficult for reading of data, even can read data, also can only carry out hand-kept, can't monitor in real time and record.Great inconvenience is all brought in the aspects such as analysis in slave unit management, data recording and later stage.

The utility model content

The purpose of this utility model provides wireless transmission lightning arrester on-Line Monitor Device, can only field observation, problems of monitoring in real time with the lightning arrester monitoring that solves prior art.

In order to achieve the above object, the technical scheme that the utility model adopted is:

Wireless transmission lightning arrester on-Line Monitor Device, include a plurality of leakage current sum counter detection node that are installed on the lightning arrester, be provided with the leakage current sample circuit that is electrically connected with lightning arrester in the described leakage current sum counter detection node, the counter sample circuit, it is characterized in that: also be provided with rf receiver and transmitter on the described leakage current sum counter detection node, described leakage current sample circuit, the output line of counter sample circuit inserts rf receiver and transmitter respectively, also include Zigbee wireless sensor network module, compile terminal by what microcontroller constituted, a plurality of leakage current sum counter detection node are connected with the wireless telecommunications of described Zigbee wireless sensor network module by rf receiver and transmitter respectively, described Zigbee wireless sensor network module is connected with the microcontroller wireless telecommunications that compile terminal, and the described microcontroller that compiles terminal is connected by the data line communication with host computer.

Described wireless transmission lightning arrester on-Line Monitor Device is characterized in that: the described terminal of compiling also comprises outer display screen, the hummer that is connected on the microcontroller.

Described wireless transmission lightning arrester on-Line Monitor Device, it is characterized in that: described leakage current sample circuit comprises the potentiometer that is connected between the lightning arrester discharge tip gap, potentiometer movable end and a stiff end are drawn lead respectively as leakage current sampled signal output lead, are electrically connected with milliammeter by diode rectifier bridge, the mu balanced circuit that is made of voltage stabilizing diode between the lightning arrester discharge tip gap; Described counter sample circuit comprises counter, and described counter is connected on the auxiliary lightning arrester by LC filtering circuit, diode rectifier bridge, is connected to sampling resistor on the discharge tip of described lightning arrester discharge tip gap one side; Described counter, milliammeter are connected with described rf receiver and transmitter communication respectively.

Described wireless transmission lightning arrester on-Line Monitor Device, it is characterized in that: draw lead inserts operational amplifier respectively by resistance inverting input on the movable end of described potentiometer, the stiff end, the in-phase input end ground connection of described operational amplifier, output terminal inserts described rf receiver and transmitter by lead.

Compared with the prior art, the utility model beneficial effect is embodied in:

1, the utility model has been realized the lightning arrester real time on-line monitoring in the electric substation, and carries out remote transmission, the security that greatly improves system.Be the unmanned of electric substation, and the intelligent grid engineering provides necessary condition.

2, this device adopts novel Zigbee wireless sensor technology, Zigbee is a kind of industrialization name of wireless connect technology, and this wireless connect technology mainly solves low cost, low-power consumption, low complex degree, low transmission rate, in-plant equipment networking application controls center and realizes effective control and management to the scene by the relevant information that collects.

3, the utility model adopts advanced ZigBee wireless sensor network technology, MANET function and self-healing function are arranged, that is to say, within a transformer station area under one's jurisdiction, whole detection node of being installed can be formed a network automatically, the data that each institute's detection node collects can be transmitted in this net automatically, compile terminal until being transferred to one, and increase or delete a detection node, certain detection node breaks down or the like, network can both self-regeneration, need not manual intervention, guarantee that total system still can operate as normal, thereby realize that image data is reliable, the remote transmission of safety, and carry out remote data management.

4, network capacity is big, and a ZigBee network can be divided into ten hundreds of subnets, and each subnet can hold maximum 254 slave units and a main equipment, can have more than 200 ZigBee sub-network simultaneously like that in an electric substation; Satisfy monitoring to all lightning arresters of electric substation.

5, the lightning arrester leakance and the counter detecting device sampling node that have radio-frequency (RF) transceiver, need not AC power, only need one joint 1# battery, and Zigbee technology has adopted the mode of operation of multiple economize on electricity, can guarantee that a joint 1# battery support reaches the service time that is not less than about 2 years.

6, the sampling period fast, the accuracy height.

Description of drawings

Fig. 1 is the utility model structured flowchart.

Fig. 2 is leakage current and counter sample circuit figure.

Fig. 3 is signal conditioning circuit figure.

Embodiment

As shown in Figure 1.Wireless transmission lightning arrester on-Line Monitor Device, include a plurality of leakage current sum counter detection node 2 that are installed on the lightning arrester, be provided with the leakage current sample circuit that is electrically connected with lightning arrester in the leakage current sum counter detection node 2, the counter sample circuit, also be provided with rf receiver and transmitter 1 on the leakage current sum counter detection node 2, the leakage current sample circuit, the output line of counter sample circuit inserts rf receiver and transmitter 1 respectively, also include Zigbee wireless sensor network module 4, compile terminal 3 by what microcontroller constituted, a plurality of leakage current sum counter detection node 2 are connected with 4 wireless telecommunications of Zigbee wireless sensor network module by rf receiver and transmitter 1 respectively, Zigbee wireless sensor network module 4 is connected with the microcontroller wireless telecommunications that compile terminal 3, and the microcontroller that compiles terminal 3 is connected by the data line communication with host computer 5.Compile terminal 3 and also comprise outer display screen 6, the hummer 7 that is connected on the microcontroller.

The leakage current sum counter detection node 2 that has radio-frequency (RF) transceiver 1, be responsible for to the perception of image data and processing and by Zigbee wireless sensor network module 4 to compiling terminal 3, compile between terminal 3 and the on-the-spot a plurality of electric current sum counter detection node 2 and realize being wirelessly transmitted to compiling terminal 3 by the Zigbee technology, compiling terminal 3 can be placed in the electric substation pulpit, the data that can observe leakage current and lightning arrester discharge time from the display screen 6 that compiles terminal 3, and alarming value can be set on the spot.When leakage current surpassed setting value, hummer 7 sent continuous chimes of doom.It is continuous by data line and computing machine 5 to compile terminal 3.On computing machine 5, install data management software like this.Just can be on computing machine 5 configuration picture long-range leakage current and the lightning arrester discharge counts that reads each monitoring point.

As shown in Figure 2.The leakage current sample circuit comprises the potentiometer RW that is connected between the lightning arrester discharge tip gap, potentiometer RW movable end and a stiff end are drawn lead respectively as leakage current sampled signal output lead, are electrically connected with milliammeter A by diode rectifier bridge, the mu balanced circuit that is made of voltage stabilizing diode between the lightning arrester discharge tip gap X; The counter sample circuit comprises counter N, and counter N is connected on the auxiliary lightning arrester P by LC filtering circuit, diode rectifier bridge, is connected to sampling resistor R on the discharge tip of lightning arrester discharge tip gap X one side; Counter N, milliammeter A are connected with rf receiver and transmitter 1 communication respectively.

Sample circuit is effective to the leakage current of 0.1-1mA, can adjust the potentiometer RW among the figure, and when leakage current was 1mA, the sample circuit output amplitude was 4V, and promptly the effective value output amplitude scope of sample circuit is 0.4-4V.Ui is the dividing potential drop output of potentiometer among Fig. 2 among Fig. 3, as thinks the amplifier ideal, Uo=5-1.25Ui then, and the Ui amplitude is 4V to the maximum, so Uo is output as the sampling request that 0-10V (Uo=0 during Ui=4V, Uo=10V during Ui=-4V) satisfies VFC.

As shown in Figure 3.The lead of drawing on the movable end of potentiometer RW, the stiff end inserts the signal conditioning circuit that operational amplifier G constitutes by resistance respectively, draw lead inserts operational amplifier G respectively by resistance inverting input on the movable end of potentiometer RW, the stiff end, the in-phase input end ground connection of operational amplifier G, output terminal inserts rf receiver and transmitter 1 by lead.

During the lightning arrester discharge, discharge current is very big, on the sampling resistor R of 1 milliohm power, can produce a constant pressure drop, utilize this voltage can write down the discharge time of lightning arrester, obviously, sampling resistor R can not have any impact to the measurement of leakage current, it should be noted that, sampling resistor can not have perception, and this quasi-resistance is arranged in the market.

Claims

1. wireless transmission lightning arrester on-Line Monitor Device, include a plurality of leakage current sum counter detection node that are installed on the lightning arrester, be provided with the leakage current sample circuit that is electrically connected with lightning arrester in the described leakage current sum counter detection node, the counter sample circuit, it is characterized in that: also be provided with rf receiver and transmitter on the described leakage current sum counter detection node, described leakage current sample circuit, the output line of counter sample circuit inserts rf receiver and transmitter respectively, also include Zigbee wireless sensor network module, compile terminal by what microcontroller constituted, a plurality of leakage current sum counter detection node are connected with the wireless telecommunications of described Zigbee wireless sensor network module by rf receiver and transmitter respectively, described Zigbee wireless sensor network module is connected with the microcontroller wireless telecommunications that compile terminal, and the described microcontroller that compiles terminal is connected by the data line communication with host computer.

2. wireless transmission lightning arrester on-Line Monitor Device according to claim 1 is characterized in that: the described terminal of compiling also comprises outer display screen, the hummer that is connected on the microcontroller.

3. wireless transmission lightning arrester on-Line Monitor Device according to claim 1, it is characterized in that: described leakage current sample circuit comprises the potentiometer that is connected between the lightning arrester discharge tip gap, potentiometer movable end and a stiff end are drawn lead respectively as leakage current sampled signal output lead, are electrically connected with milliammeter by diode rectifier bridge, the mu balanced circuit that is made of voltage stabilizing diode between the lightning arrester discharge tip gap; Described counter sample circuit comprises counter, and described counter is connected on the auxiliary lightning arrester by LC filtering circuit, diode rectifier bridge, is connected to sampling resistor on the discharge tip of described lightning arrester discharge tip gap one side; Described counter, milliammeter are connected with described rf receiver and transmitter communication respectively.

4. wireless transmission lightning arrester on-Line Monitor Device according to claim 3, it is characterized in that: the lead of drawing on the movable end of described potentiometer, the stiff end inserts the signal conditioning circuit that operational amplifier constitutes by resistance respectively, draw lead inserts operational amplifier respectively by resistance inverting input on the movable end of described potentiometer, the stiff end, the in-phase input end ground connection of described operational amplifier, output terminal inserts described rf receiver and transmitter by lead.