CN109084673A - A kind of power transmission line sag monitoring system and its monitoring method based on arc sag extreme lower position electric field intensity measuremenrt - Google Patents
A kind of power transmission line sag monitoring system and its monitoring method based on arc sag extreme lower position electric field intensity measuremenrt Download PDFInfo
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- CN109084673A CN109084673A CN201810962221.5A CN201810962221A CN109084673A CN 109084673 A CN109084673 A CN 109084673A CN 201810962221 A CN201810962221 A CN 201810962221A CN 109084673 A CN109084673 A CN 109084673A
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- 230000005684 electric field Effects 0.000 title claims abstract description 40
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 44
- 230000005611 electricity Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 13
- 230000008054 signal transmission Effects 0.000 claims abstract description 10
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/185—Electrical failure alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt that the present invention provides a kind of monitors system, and the arc sag monitoring system includes signal acquisition unit, signal transmission unit, data processing unit, central control unit, storage unit, display unit, key-press input unit, alarm unit and communication unit；The variation for the electric field strength that the arc sag monitoring system is measured according to the arc sag extreme lower position calculates arc sag size, judge whether the power transmission line sag is normal in conjunction with the working condition and real-time weather conditions of the transmission line of electricity, if abnormal, issue alarm in time by alarm unit, it is shown by the display unit, monitoring center is uploaded to by the communication unit.The present invention provides a kind of power transmission line sag monitoring system and method based on arc sag extreme lower position electric field intensity measuremenrt, calculates real-time arc sag according to the variation of arc sag extreme lower position ground electric field intensity, improves the accuracy of arc sag monitoring.
Description
Technical field
It is the invention belongs to technical field of electric power detection, in particular to a kind of based on arc sag extreme lower position electric field intensity measuremenrt
Power transmission line sag monitors system and its monitoring method.
Background technique
With the fast development of China's power industry, people require also increasingly the safety and reliability of electric system
It is high.Important component one of of the transmission line of electricity as electric system needs for the safety and reliability for guaranteeing electric system
Effective monitoring in real time is carried out to transmission line of electricity.Arc sag monitoring is one of the important content of transmission line of electricity monitoring, if arc sag is too small,
It will increase tower load, and then broken string, tower may occur and fall the accidents such as string；If arc sag is too big, conducting wire and ground can be made
Trees, building etc. are in contact and discharge, so as to cause line tripping power-off.Since transmission line of electricity is subjected to nature for a long time
Environment influences, and arc sag can change a lot, and then need to be monitored arc sag, to ensure the safe operation of transmission line of electricity.
Currently, manual inspection method, image monitoring method, radar sensor mensuration etc., but these are mainly taken in arc sag monitoring
Method is influenced vulnerable to extraneous and weather, and accuracy is less high, and the present invention proposes a kind of based on the survey of arc sag extreme lower position electric field strength
The power transmission line sag of amount monitors system, calculates real-time arc sag according to the variation of arc sag extreme lower position ground electric field intensity, and
Carry out analyzing and determining whether arc sag is normal in conjunction with real-time weather conditions, improves the accuracy of arc sag monitoring, and then guarantee power transmission line
The safe and reliable operation in road.
Summary of the invention
The present invention provides a kind of power transmission line sag monitoring system and side based on arc sag extreme lower position electric field intensity measuremenrt
Method calculates real-time arc sag according to the variation of arc sag extreme lower position ground electric field intensity, and is divided in conjunction with real-time weather conditions
Analysis judges whether arc sag is normal, improves the accuracy of arc sag monitoring.
The present invention is specially a kind of power transmission line sag monitoring system based on arc sag extreme lower position electric field intensity measuremenrt, institute
Stating arc sag monitoring system includes signal acquisition unit, signal transmission unit, data processing unit, central control unit, storage list
Member, display unit, key-press input unit, alarm unit and communication unit, the signal acquisition unit and signal transmission are single
First, the described data processing unit, the central control unit be linked in sequence, the central control unit also respectively with the storage
Unit, the display unit, the key-press input unit, the alarm unit, the communication unit are connected, the arc sag prison
The variation for the electric field strength that examining system is measured according to the arc sag extreme lower position calculates arc sag size, in conjunction with the transmission line of electricity
Working condition and real-time weather conditions judge whether the power transmission line sag normal, if abnormal, by alarm unit and
When issue alarm, shown by the display unit, monitoring center be uploaded to by the communication unit.
The signal acquisition unit uses MEMS electric field strength transducer[sensor, has the characteristics that small in size, light-weight, low energy consumption,
Output voltage signal, and the signal transmission unit is transmitted to using ZigBee mechanics of communication；The MEMS electric field strength sensing
Device is mounted on the corresponding ground of power transmission line sag extreme lower position between two transmission of electricity tower bars, and the arc sag extreme lower position is corresponding
Ground is determined using detections of radar equipment.
The data transmission unit includes the first communication station and the second communication station, and first communication station is mounted on the tower
On bar, the data of acquisition are transported to first communication station by wireless network by the signal acquisition unit, then pass through OPGW light
Cable transports to second communication station, realizes the transmission of field data.
The data processing unit includes amplification module, filter module and A/D conversion module, and the amplification module is by second level
Amplifier is connected in series: circuit prime includes the first amplifier and the second amplifier, is put from first amplifier, described second
Big device non-inverting input terminal input signal；Circuit rear class uses difference amplifier, can offset common mode interference；The filter module is adopted
With RC low-pass filter.
The key-press input unit carries out parameter, alarming value setting in conjunction with the storage unit, the display unit, described
Alarming value includes arc sag size and arc sag change rate, is carried out according to the different working condition of different weather conditions, power circuit
It is respectively set.
The power transmission line sag monitoring system based on arc sag extreme lower position electric field intensity measuremenrt that the present invention also provides a kind of
Monitoring method, the monitoring method include the following steps:
Step (1): measuring the corresponding ground electric field intensity of the arc sag extreme lower position by the electric field strength transducer[sensor,
And pass through wireless network transmissions to first communication station；
Step (2): the signal of acquisition is transported to second communication station by OPGW optical cable by first communication station, is realized
The upload of field data；
Step (3): processing is amplified to signal by the amplification module, while offsetting common mode interference；
Step (4): high frequency harmonic signals are filtered out by the low-pass filter；
Step (5): A/D conversion is carried out by the A/D conversion module, and the signal of acquisition is stored in the storage list
Member；
Step (6): the central control unit according to the electric field strength of in-site measurement and the electric power line voltage value,
Current value calculates the arc sag size, and carries out storage and show；
Step (7): the central control unit transfers the real-time weather conditions by the communication unit, according to difference
Weather conditions select corresponding alarming value, and be compared judgement with the arc sag size, if within the scope of the alarming value,
Then continue to test；If being less than the alarming value range, the too small alarm of arc sag is issued；If more than the alarming value range, arc is issued
Vertical too big alarm, is uploaded to the monitoring center for warning message by the communication unit；
Step (8): the central control unit calculates the arc sag change rate according to the arc sag size, and with the report
Alert value is compared, and if more than the alarming value, issues the alarm of arc sag variation abnormality by the alarm unit.
Detailed description of the invention
Fig. 1 is the knot that a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt of the present invention monitors system
Structure schematic diagram.
Specific embodiment
The power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt a kind of to the present invention is supervised with reference to the accompanying drawing
The specific embodiment of examining system elaborates.
As shown in Figure 1, arc sag monitoring system of the invention includes signal acquisition unit, signal transmission unit, data processing
Unit, central control unit, storage unit, display unit, key-press input unit, alarm unit and communication unit, the signal
Acquisition unit and the signal transmission unit, the data processing unit, the central control unit are linked in sequence, the center
Control unit also respectively with the storage unit, display unit, the key-press input unit, the alarm unit, described
Communication unit is connected, and the variation for the electric field strength that the arc sag monitoring system is measured according to the arc sag extreme lower position calculates
Just whether arc sag size judge the power transmission line sag in conjunction with the working condition and real-time weather conditions of the transmission line of electricity
Often, alarm is issued by alarm unit if abnormal, in time, is shown by the display unit, passes through the communication unit
Member is uploaded to monitoring center.
The signal acquisition unit uses MEMS electric field strength transducer[sensor, has the characteristics that small in size, light-weight, low energy consumption,
Output voltage signal, and the signal transmission unit is transmitted to using ZigBee mechanics of communication；The MEMS electric field strength sensing
Device is mounted on the corresponding ground of power transmission line sag extreme lower position between two transmission of electricity tower bars, and the arc sag extreme lower position is corresponding
Ground is determined using detections of radar equipment.
The data transmission unit includes the first communication station and the second communication station, and first communication station is mounted on the tower
On bar, the data of acquisition are transported to first communication station by wireless network by the signal acquisition unit, then pass through OPGW light
Cable transports to second communication station, realizes the transmission of field data.
The data processing unit includes amplification module, filter module and A/D conversion module, and the amplification module is by second level
Amplifier is connected in series: circuit prime includes the first amplifier and the second amplifier, is put from first amplifier, described second
Big device non-inverting input terminal input signal；Circuit rear class uses difference amplifier, can offset common mode interference；The filter module is adopted
With RC low-pass filter.
The key-press input unit carries out parameter, alarming value setting in conjunction with the storage unit, the display unit, described
Alarming value includes arc sag size and arc sag change rate, is carried out according to the different working condition of different weather conditions, power circuit
It is respectively set.
The power transmission line sag monitoring system based on arc sag extreme lower position electric field intensity measuremenrt that the present invention also provides a kind of
Monitoring method, the monitoring method include the following steps:
Step (1): measuring the corresponding ground electric field intensity of the arc sag extreme lower position by the electric field strength transducer[sensor,
And pass through wireless network transmissions to first communication station；
Step (2): the signal of acquisition is transported to second communication station by OPGW optical cable by first communication station, is realized
The upload of field data；
Step (3): processing is amplified to signal by the amplification module, while offsetting common mode interference；
Step (4): high frequency harmonic signals are filtered out by the low-pass filter；
Step (5): A/D conversion is carried out by the A/D conversion module, and the signal of acquisition is stored in the storage list
Member；
Step (6): the central control unit according to the electric field strength of in-site measurement and the electric power line voltage value,
Current value calculates the arc sag size, and carries out storage and show；
Step (7): the central control unit transfers the real-time weather conditions by the communication unit, according to difference
Weather conditions select corresponding alarming value, and be compared judgement with the arc sag size, if within the scope of the alarming value,
Then continue to test；If being less than the alarming value range, the too small alarm of arc sag is issued；If more than the alarming value range, arc is issued
Vertical too big alarm, is uploaded to the monitoring center for warning message by the communication unit；
Step (8): the central control unit calculates the arc sag change rate according to the arc sag size, and with the report
Alert value is compared, and if more than the alarming value, issues the alarm of arc sag variation abnormality by the alarm unit.
Finally it should be noted that only illustrating technical solution of the present invention rather than its limitations in conjunction with above-described embodiment.Institute
The those of ordinary skill in category field is it is to be understood that those skilled in the art can repair a specific embodiment of the invention
Change or equivalent replacement, but these modifications or change are being applied among pending claims.
Claims (6)
1. a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt monitors system, which is characterized in that described
Arc sag monitoring system include signal acquisition unit, signal transmission unit, data processing unit, central control unit, storage unit,
Display unit, key-press input unit, alarm unit and communication unit, the signal acquisition unit and the signal transmission unit,
The data processing unit, the central control unit are linked in sequence, and the central control unit is also single with the storage respectively
First, the described display unit, the key-press input unit, the alarm unit, the communication unit are connected, the arc sag monitoring
The variation for the electric field strength that system is measured according to the arc sag extreme lower position calculates arc sag size, in conjunction with the transmission line of electricity
Working condition and real-time weather conditions judge whether the power transmission line sag is normal, timely by alarm unit if abnormal,
Alarm is issued, is shown by the display unit, monitoring center is uploaded to by the communication unit.
2. a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt according to claim 1 monitors system
System, which is characterized in that the signal acquisition unit uses MEMS electric field strength transducer[sensor, with small in size, light-weight, low energy consumption
Feature, output voltage signal, and the signal transmission unit is transmitted to using ZigBee mechanics of communication；The MEMS electric field strength
Sensor is mounted on the corresponding ground of power transmission line sag extreme lower position between two transmission of electricity tower bars, the arc sag extreme lower position pair
The ground answered is determined using detections of radar equipment.
3. a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt according to claim 2 monitors system
System, which is characterized in that the data transmission unit includes the first communication station and the second communication station, and first communication station is mounted on
In the tower bar, the data of acquisition are transported to first communication station by wireless network by the signal acquisition unit, then are passed through
OPGW optical cable transports to second communication station, realizes the transmission of field data.
4. a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt according to claim 3 monitors system
System, which is characterized in that the data processing unit includes amplification module, filter module and A/D conversion module, the amplification module
Be connected in series by two-stage amplifier: circuit prime includes the first amplifier and the second amplifier, from first amplifier, described
Second amplifier non-inverting input terminal input signal；Circuit rear class uses difference amplifier, can offset common mode interference；The filtering
Module uses RC low-pass filter.
5. a kind of power transmission line sag based on arc sag extreme lower position electric field intensity measuremenrt according to claim 4 monitors system
System, which is characterized in that the key-press input unit carries out parameter in conjunction with the storage unit, the display unit, alarming value is set
It sets, the alarming value includes arc sag size and arc sag change rate, according to the different work shape of different weather conditions, power circuit
State is respectively set.
6. the transmission line of electricity arc based on arc sag extreme lower position electric field intensity measuremenrt described in any one of -5 according to claim 1
The monitoring method for monitoring system of hanging down, which is characterized in that the monitoring method includes the following steps:
Step (1): the corresponding ground electric field intensity of the arc sag extreme lower position is measured by the electric field strength transducer[sensor, and is led to
Wireless network transmissions are crossed to first communication station；
Step (2): the signal of acquisition is transported to second communication station by OPGW optical cable by first communication station, realizes scene
The upload of data；
Step (3): processing is amplified to signal by the amplification module, while offsetting common mode interference；
Step (4): high frequency harmonic signals are filtered out by the low-pass filter；
Step (5): A/D conversion is carried out by the A/D conversion module, and the signal of acquisition is stored in the storage unit；
Step (6): the central control unit is according to the electric field strength and the electric power line voltage value, electric current of in-site measurement
Value calculates the arc sag size, and carries out storage and show；
Step (7): the central control unit transfers the real-time weather conditions by the communication unit, according to different days
Vaporous condition selects corresponding alarming value, and is compared judgement with the arc sag size, if within the scope of the alarming value, after
Continuous detection；If being less than the alarming value range, the too small alarm of arc sag is issued；If more than the alarming value range, arc sag is issued too
Big alarm, is uploaded to the monitoring center for warning message by the communication unit；
Step (8): the central control unit calculates the arc sag change rate according to the arc sag size, and with the alarming value
It is compared, if more than the alarming value, the alarm of arc sag variation abnormality is issued by the alarm unit.
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Cited By (4)
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| CN110595340A (en) * | 2019-07-09 | 2019-12-20 | 国网江苏省电力有限公司徐州供电分公司 | High-voltage overhead transmission line sag detection system based on field intensity change and detection method thereof |
| CN111666705A (en) * | 2020-06-30 | 2020-09-15 | 上海工程技术大学 | Finite element analysis-based lead sag detection method and system |
| CN112797881A (en) * | 2020-12-04 | 2021-05-14 | 国网江苏省电力有限公司盐城供电分公司 | Overhead line sag detection and early warning method based on unmanned aerial vehicle magnetic field measurement |
| CN113945807A (en) * | 2021-11-17 | 2022-01-18 | 国网江苏省电力有限公司盐城供电分公司 | Lightning stroke detection and positioning method for power transmission line |
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