CN103592580A - Insulator haze and pollution flashover online monitoring system and method - Google Patents

Abstract

The invention discloses an on-line monitoring system and method for haze and pollution flashover of insulators, which includes a monitoring terminal and a monitoring device. After the calculation of the formula, a fog flash value reflecting the insulator flashover is obtained, compare the fog flash value with the established threshold value, and decide whether to issue a two-level fog flash alarm of "Caution, Danger" according to the comparison result, and then the monitoring host The program displays real-time monitoring results and historical data curves on the man-machine interface. It can not only realize the degree of smog and pollution in the duty room, but also adopts the wireless communication method of GSM SMS module, eliminating the trouble of long-distance communication and wiring wiring; solar and battery power supply, high-voltage pulse generation mode and low power consumption Designed to ensure that the equipment operates around the clock.

Description

An on-line monitoring system and method for insulator haze and pollution flashover

technical field

The invention relates to the field of power grid operation safety, in particular to an insulator haze and pollution flashover online monitoring system and method for preventing insulator haze and pollution flashover from insufficient external insulation caused by haze and pollution factors to cause surface flashover or air ionization breakdown discharge accidents.

Background technique

Due to the steady and rapid development of my country's economy, on the one hand, the demand for electricity is increasing day by day, the voltage level of power system transmission lines is constantly increasing, the scale of the power grid is constantly expanding, and the number of AC and DC interconnections is increasing. On the other hand, pollution sources in various regions are constantly increasing. Pollution intensified. Pollution will be deposited on the surface of insulators exposed to polluted conditions. When encountering adverse weather such as heavy fog, drizzle, freezing rain, condensation, rime, snow rime, melting ice, and melting snow, it is easy to cause grid pollution flashover accidents. According to statistics, in the power grid faults, insulator faults account for the first place among all faults on transmission lines, and the tripping rate caused by insulator flashover caused by lightning strikes accounts for more than 60% of the total tripping rate of the line, and the power loss caused by external insulation pollution flashover is lightning damage When the dirt deposited on the surface of high-voltage insulators interacts with fog, haze and other climates, it is easy to cause pollution flashover of insulators, which affects the safe operation of power lines.

In addition to tripping caused by insulator flashover, according to statistics in recent years, air insulation breakdown of 220kV and 500kV high-voltage transmission lines due to smog (rather than surface flashover along the surface of insulator strings) and accidents resulting in line tripping are also common. occur, seriously threatening the safe operation of the power system.

At present, there are mainly two types of haze monitoring and pollution flashover devices at home and abroad:

1. PM2.5 detection: monitor the amount of PM2.5 particles in the air as a quantification of the degree of atmospheric smog. This method and results are inconsistent with the mechanism and law of insulator flashover in the power grid, and the detection results of PM2.5 cannot be used as The basis for judging whether insulator flashover or air ionization breakdown will occur.

2. Insulator pollution flashover monitoring device: By measuring the insulator leakage current, the basis for judging whether the insulator has pollution flashover discharge. The device can only judge a single factor of pollution, without taking the smog factor into consideration.

However, there are some problems in the above-mentioned alarm devices, and the judgment basis for insulator flashover and air ionization breakdown caused by comprehensive factors of smog and pollution cannot be realized.

Contents of the invention

In order to solve the technical problems in the background technology, the present invention proposes a method that can realize the degree of smog and pollution in the duty room, and can know whether there is pollution flashover or air ionization breakdown tripping of insulators without inspection of substations and lines. Dangerous insulator haze and pollution flashover online monitoring system and method.

The first aspect of the present invention provides an on-line monitoring system for insulator smog and pollution flashover, including a monitoring terminal and a monitoring device, and the monitoring terminal includes a signal-connected solar power supply module, a capacitor dielectric current collection device, an insulator leakage current collection device, and a single-chip microcomputer With GSM SMS module.

The monitoring terminal is connected to the monitoring device through a wireless network signal.

The solar power supply module supplies power to the monitoring terminal.

The capacitive medium current acquisition device is used for measuring the current of the capacitive medium.

The insulator leakage current acquisition device is used to measure the leakage current of the insulator.

After the single-chip microcomputer is used to collect the current signal of the capacitor medium and the leakage current signal of the insulator, after calculating the formula solidified by the program, the fog flash value reflecting the flashover of the insulator is obtained, and the fog flash value is compared with the predetermined threshold value, and according to the comparison The results determine whether to make a two-level fog flash alarm of "Caution, Danger".

The GSM short message module is used to receive the measurement of the current signal of the capacitive medium and the leakage current signal of the insulator and send it to the monitoring device.

Described monitoring device comprises GSM short message terminal equipment and monitoring mainframe, wherein, described GSM short message terminal equipment is used for receiving from the fog flash value after single-chip computer calculation by GSM short message module; Described monitoring mainframe is used for displaying GSM short message at man-machine interface Real-time monitoring results and historical data curves received by terminal equipment.

Further, the capacitive dielectric current acquisition device includes a capacitive dielectric current sensor, a relay, a fan, and a high-voltage pulse power supply for providing working power, the capacitive dielectric current sensor is connected to the high-voltage pulse power supply, and the relay controls the fan to blow the air The current signal of the capacitive medium is obtained by pumping it into the capacitive device.

Further, the high-voltage pulse power supply includes a signal-connected reference voltage unit, an ADC conversion unit, a single-chip processing unit, an AD9851 unit, a broadband amplifier unit, and an output unit.

Further, the insulator leakage current acquisition device includes an insulator leakage current sensor and a slip ring installed on the insulator string.

Further, the solar power supply module includes a solar controller and a solar panel connected to the input of the solar controller, and the output of the solar controller includes a 12V direct output and a 12V to 5V DC-DC conversion stabilized voltage 5V output after the converter.

Further, the solar power supply module also includes a storage battery in bidirectional communication with the solar controller, which is used to supply power to the monitoring terminal when the electric capacity collected by the solar panel is not enough, and when the electric capacity of the battery is not enough, the solar controller will The electricity collected by the solar panel is charged into the battery.

Preferably, the fog flash alarm uses a monitoring host to buzz.

The second aspect of the present invention provides an on-line monitoring method for insulator haze and pollution flashover, including an online monitoring system for insulator haze and pollution flashover as described above, specifically including the following steps:

S1: Connect the capacitive medium current sensor to the high-voltage pulse power supply, and the relay controls the fan to draw air into the capacitive device, and measure the current of the capacitive medium; at the same time:

S2: Isolate the collector ring optocoupler installed on the insulator string, and measure the leakage current of the insulator by the insulator leakage current sensor;

S3: Use a single-chip microcomputer to collect the current signal of the capacitor medium and the leakage current signal of the insulator. After calculating the formula solidified by the program, a fog flash value reflecting the flashover of the insulator is obtained, and the fog flash value is compared with the established threshold value. Based on the comparison The result determines whether to make a two-level fog flash alarm of "Caution, Danger";

S4: Send the measurement data of the current signal of the capacitor medium and the leakage current signal of the insulator to the GSM SMS terminal equipment of the monitoring device through the GSM SMS module, and the program of the monitoring host will display the real-time monitoring results and historical data curves on the man-machine interface.

Further, in the step S4, if the fog flash value is greater than the threshold value, a "dangerous" fog flash alarm is issued; if the fog flash value is equal to the threshold value, a "caution" fog flash alarm is issued.

Based on the disclosure of the above-mentioned technical solution, the present invention can know the degree of smog and pollution in the duty room, and can know whether the insulator has the risk of pollution flashover or air ionization breakdown tripping without inspection of substations and lines; realize attention and danger The two-level fog flash alarm is used as a reference for the equipment operation and management unit to take measures such as step-down operation or arrange insulator cleaning plans; the wireless communication mode of the GSM SMS module eliminates the trouble of long-distance communication and wiring wiring; solar and battery power supply, The high-voltage pulse generation method and low power consumption design can ensure that the equipment runs around the clock.

Description of drawings

Fig. 1 is the working principle diagram of the insulator smog and pollution flashover online monitoring system proposed by the present invention;

2 is a schematic diagram of the external structure of the monitoring terminal of the insulator haze and pollution flashover online monitoring system provided by the present invention;

Fig. 3 is the structural block diagram of the monitoring terminal of the insulator haze and pollution flashover online monitoring system provided by the present invention;

Fig. 4 is the working principle diagram of the solar power supply module of the insulator smog and pollution flashover online monitoring system provided by the present invention;

Fig. 5 is a working principle diagram of the high-voltage pulse power supply of the insulator haze and pollution flashover online monitoring system provided by the present invention;

Fig. 6 is a working flow chart of the insulator haze and pollution flashover online monitoring method provided by the present invention;

Fig. 7 is a flow chart of the monitoring host program of the on-line monitoring method for insulator haze and pollution flashover provided by the present invention.

Explanation of reference numbers

1-monitoring terminal, 11-solar power supply module, 111-solar controller, 112-solar panel, 113-overhead wire, 114-iron tower, 115-DC-DC conversion regulator, 116-battery, 12-capacitance medium Current acquisition device, 121-high voltage pulse power supply, 211-reference voltage unit, 212-ADC conversion unit, 213-single chip processing unit, 214-AD9851 unit, 215-broadband amplifier unit, 216-output unit, 13-insulator leakage current acquisition Device, 14-single-chip microcomputer, 15-GSM short message module, 2-monitoring device, 21-GSM short message terminal equipment, 22-monitoring host.

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, an on-line monitoring system for insulator smog and pollution flashover, including a monitoring terminal 1 and a monitoring device 2, and the monitoring terminal 1 and the monitoring device 2 are connected through a wireless network 3 signal.

Please refer to FIG. 1 to FIG. 3 , the monitoring terminal 1 includes a solar power supply module 11 with signal connection, a capacitive dielectric current collection device 12 , an insulator leakage current collection device 13 , a single-chip microcomputer 14 and a GSM short message module 15 .

Please refer to Fig. 1, Fig. 3 and Fig. 4, the solar power supply module 11 supplies power for the monitoring terminal 1, and it includes a solar controller 111 and a solar panel 112 connected to the input of the solar controller and its auxiliary devices. The overhead wire 113 and the iron tower 114 of the solar panel mobile phone sunlight, and the solar power supply module 11 also includes a battery 116 bidirectionally connected with the solar controller 111, which is used for when the electric capacity collected by the solar panel 112 is not enough. The monitoring terminal 1 supplies power and when the storage battery 116 is not full, the solar controller charges the electric capacity collected by the solar panel 112 into the storage battery 116. The output of the solar controller 111 includes 12V direct output and 12V to The 5V output of the 5V DC-DC conversion regulator 115 .

Please refer to FIG. 3 and FIG. 5, the capacitive medium current acquisition device 12 is used to measure the current of the capacitive medium, which includes a capacitive medium current sensor (not shown), a relay (not shown), a fan (not shown) and The high-voltage pulse power supply 121 is used to provide working power. The capacitive medium current sensor is connected to the high-voltage pulse power supply, and the relay controls the fan to draw air into the capacitive device to obtain the current signal of the capacitive medium.

Please refer to Fig. 5, described high-voltage pulse power supply 121 comprises the reference voltage unit 211 of signal connection, ADC conversion unit 212, single-chip microcomputer processing unit 213, AD9851 unit 214, broadband amplifier unit 215 and output unit 216; Wherein, described single-chip microcomputer processing unit What 213 uses is Atmel mega48 one-chip computer.

Please refer to FIG. 3 , the insulator leakage current acquisition device 13 is used to measure the leakage current of the insulator, which includes an insulator leakage current sensor (not shown) and a slip ring (not shown) installed on the insulator string.

Please refer to Fig. 3, after described single-chip microcomputer 14 is used for collecting the current signal of the capacitive medium measured by described capacitive medium current acquisition device 12 and the leakage current signal of the insulator measured by said insulator leakage current acquisition device 13, after After calculating the formula solidified by the program, the fog flash value reflecting the insulator flashover is obtained, compare the fog flash value with the established threshold value, and decide whether to issue a two-level fog flash alarm of "Caution, Danger" according to the comparison result; among them, Described single-chip microcomputer 14 is Atmel mega48 single-chip microcomputer, and the fog flash alarm adopts monitoring host to buzz.

Please refer to FIG. 1 and FIG. 3 , the GSM short message module 15 is used to receive the measurement of the current signal of the capacitive medium and the leakage current signal of the insulator and send it to the monitoring device 2 .

Please refer to Fig. 1 and Fig. 3, described monitoring device 2 comprises GSM short message terminal equipment 21 and monitoring main frame 22, wherein, described GSM short message terminal equipment 21 is used for receiving the fog flash value after calculating from single-chip 14 by GSM short message module 15 The monitoring host 22 is used to display the real-time monitoring results and historical data curves received by the GSM short message terminal device 21 on the man-machine interface. the

Please refer to Figure 6, the online monitoring method based on the above insulator haze and pollution flashover online monitoring system, specifically includes the following steps:

S1: Connect the capacitive medium current sensor to the high-voltage pulse power supply, and the relay controls the fan to draw air into the capacitive device, and measure the current of the capacitive medium; at the same time:

S2: Isolate the collector ring optocoupler installed on the insulator string, and measure the leakage current of the insulator by the insulator leakage current sensor;

S3: Use a single-chip microcomputer to collect the current signal of the capacitor medium and the leakage current signal of the insulator. After calculating the formula solidified by the program, a fog flash value reflecting the flashover of the insulator is obtained, and the fog flash value is compared with the established threshold value. Based on the comparison The result determines whether to make a two-level fog flash alarm of "Caution, Danger";

S4: Send the measurement data of the current signal of the capacitor medium and the leakage current signal of the insulator to the GSM SMS terminal equipment of the monitoring device through the GSM SMS module, and the program of the monitoring host will display the real-time monitoring results and historical data curves on the man-machine interface.

Please refer to Fig. 7, described monitoring main frame 22 comprises three kinds of modes, is respectively manual mode, timing mode and automatic mode, and wherein, automatic mode is to start processing storage automatically after receiving the fog flash value data that GSM short message terminal equipment 21 uploads automatically Display the obtained data, and then compare the fog flash value with the established threshold value. If the fog flash value is greater than the threshold value, the danger alarm signal will be activated, the danger warning map will be displayed and the computer will beep. If the fog flash value is equal to the threshold value, the attention alarm signal will be activated. If the fog flash value is less than the threshold value, it will send a shutdown signal and then turn off the display and storage status; in manual mode, it is also necessary to start the startup signal and then start the storage and display startup.

To sum up, the present invention can know the degree of smog and pollution in the duty room, and can know whether the insulators have the risk of pollution flashover or air ionization breakdown tripping without inspection of substations and lines; realize two-level fog flashover of attention and danger Alarm, for the equipment operation and management unit to take measures such as step-down operation or arrange insulator cleaning plan as a reference; the wireless communication mode of the GSM SMS module eliminates the trouble of long-distance communication and wiring wiring; solar and battery power supply, high-voltage pulse generation mode And low power consumption design, which can ensure the equipment to run around the clock.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (10)

1. an insulator haze and pollution flashover on-line monitoring system, it is characterized in that, comprise monitoring terminal and supervising device, described monitoring terminal comprises solar powered module, capacitor dielectric current collecting device, insulator leakage current harvester, single-chip microcomputer and the GSM SMS module that signal connects, wherein:

Solar powered module is described monitoring terminal power supply;

Capacitor dielectric current collecting device, for measuring the electric current of capacitor dielectric;

Insulator leakage current harvester, for measuring the leakage current of insulator;

Single-chip microcomputer, for gathering after the current signal of capacitor dielectric and the leakage current signal of insulator, after the formula calculating of program Solidification, draw the mist sudden strain of a muscle value of reflection insulator arc-over, relatively mist sudden strain of a muscle value and set threshold value, and dodge warning according to the two-stage mist that result relatively determines whether to make " note, danger ";

GSM SMS module, for the measure and transmit that receives the current signal of capacitor dielectric and the leakage current signal of insulator to supervising device;

Described supervising device comprises GSM short message terminal equipment and monitoring host computer, wherein:

GSM short message terminal equipment, is worth for the mist sudden strain of a muscle receiving by GSM SMS module after calculating from single-chip microcomputer;

Monitoring host computer, for showing in man-machine interface Real-Time Monitoring result and the historical data curve that GSM short message terminal equipment receives.

2. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, is characterized in that, described monitoring terminal is connected by wireless network signal with supervising device.

3. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, it is characterized in that, described capacitor dielectric current collecting device comprises capacitor dielectric current sensor, relay, fan and in order to the high-voltage pulse power source of working power to be provided, described capacitor dielectric current sensor is connected with described high-voltage pulse power source, by Control fan, air is drawn into the current signal that obtains capacitor dielectric in capacitive means.

4. a kind of insulator haze according to claim 3 and pollution flashover on-line monitoring system, it is characterized in that, described high-voltage pulse power source comprises reference voltage unit, ADC converting unit, single-chip microcomputer processing unit, AD9851 unit, broad band amplifier unit and the output unit that signal connects.

5. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, is characterized in that, described insulator leakage current harvester comprises insulator leakage current sensor and is arranged on the collector ring on insulator chain.

6. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, it is characterized in that, described solar powered module comprises controller for solar and the solar panel being connected with the input of described controller for solar, and the output of described controller for solar comprises the 5V output after the DC-DC conversion voltage stabilizer that 12V directly exports and arrive 5V through 12V.

7. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, it is characterized in that, described solar powered module also comprises and the diconnected accumulator of controller for solar, is that described monitoring terminal power supply and the electric capacity by controller for solar, solar panel collected when capacity of the accumulator is discontented with are filled with in accumulator when not enough for the electric capacity collected when solar panel.

8. a kind of insulator haze according to claim 1 and pollution flashover on-line monitoring system, is characterized in that, mist dodges to report to the police and adopts monitoring host computer to carry out buzzing.

9. insulator haze and a pollution flashover on-line monitoring method, is characterized in that, comprises if the claims 1 are to a kind of insulator haze claimed in claim 8 and pollution flashover on-line monitoring system, comprises the following steps:

S1: capacitor dielectric current sensor is connected to high-voltage pulse power source, by Control fan, air is drawn in capacitive means, measure the electric current of capacitor dielectric; Simultaneously:

S2: by the collector ring light-coupled isolation being installed on insulator chain, measured the leakage current of insulator by insulator leakage current sensor;

S3: adopt single-chip microcomputer to gather the current signal of capacitor dielectric and the leakage current signal of insulator, after the formula calculating of program Solidification, draw the mist sudden strain of a muscle value of a reflection insulator arc-over, relatively mist sudden strain of a muscle value and set threshold value, and dodge warning according to the two-stage mist that result relatively determines whether to make " note, danger ";

S4: by GSM SMS module, the measurement data of the leakage current signal of the current signal of capacitor dielectric and insulator is sent to the GSM short message terminal equipment of supervising device, shows Real-Time Monitoring result and historical data curve by the program of monitoring host computer in man-machine interface.

10. a kind of insulator haze according to claim 9 and pollution flashover on-line monitoring method, is characterized in that, in described step S4, if mist sudden strain of a muscle value is greater than threshold value, sends " danger " mist and dodge warning; If mist sudden strain of a muscle value equals threshold value, send " attention " mist and dodge warning.

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