CN104483561A - Method and equipment for detecting insulator - Google Patents
Method and equipment for detecting insulator Download PDFInfo
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- CN104483561A CN104483561A CN201410705956.1A CN201410705956A CN104483561A CN 104483561 A CN104483561 A CN 104483561A CN 201410705956 A CN201410705956 A CN 201410705956A CN 104483561 A CN104483561 A CN 104483561A
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Abstract
The invention discloses a method and equipment for detecting an insulator. The method is characterized in that a sensor is carried on an aircraft, and comprises the following steps of enabling the aircraft to receive a control signaling about azimuth information, so as to fly according to the azimuth information; enabling the aircraft to obtain the current value sensed by a corresponding electromagnetic field of the insulator, and send the current value to an analysis device in real time; enabling the analysis device to determine whether the insulator has fault or not according to a current value change curve. By adopting the scheme, the method has the advantage that the insulation is detected by a noncontact method, so the detection efficiency is improved, and the workload is reduced.
Description
Technical field
The present invention relates to Performance Detection technology, particularly relate to the method and apparatus that insulator is detected.
Background technology
Insulator is a kind of special insulator arrangement, can play an important role in overhead transmission line.In one's early years, insulator is used for electric pole, and slowly develop and hung the insulator of a lot of plate-like in one end of high type high-tension bus-bar connection tower, it is in order to increase creepage distance, is usually made up of pottery or glass, is just insulator.Insulator should not to change the inefficacy of the insulation resistance caused due to environment and electric load condition, otherwise insulator will lose insulating effect, causes the generation of transmission line insulator fault.
Insulator is used to support and fixing cord and energized conductor and makes between energized conductor or have enough Distance geometry to insulate between conductor and the earth.Insulator should have enough electrical insulation strength and moisture-resistance.
Insulator in use, there will be fault.Insulator breakdown is mainly caused by insulation resistance deterioration and surface filth.Faulty insulator is divided into again low resistance insulator (to cause deterioration due to mechanical load and high-tension long-term synergy, this all will make insulator breakdown voltage constantly decline, low resistance insulator is called when dropping to and being less than the dry lightning pressure along face) and zero resistance insulator (limit of low resistance insulator is called zero resistance insulator when namely internal breakdown voltage is zero).And so-called contaminated insulator is exactly the insulator because severe environmental pollution causes surperficial Leakage Current to increase.
The spread voltage of normal insulation depends primarily on insulator selfcapacity and the stray capacitance over the ground, to wire thereof.Have nothing to do with insulating resistance value, and present the distribution of the asymmetric shape of a saddle, therefore, when putting into operation, the temperature rise of insulator chain also shows as the distribution of the asymmetric shape of a saddle, and namely at the two ends temperature drift of insulator chain, centre reduces gradually, temperature continuous distribution.
After the performance degradation of insulator, insulation resistance reduces, and its spread voltage and the degree of heat reduce with resistance and respective change occurs.Research shows, normal insulator dielectric resistance >=300M Ω, and at this moment insulator spread voltage is constant, and has nothing to do, so surface is relative to ambient atmosphere temperature rise also approximately constant with resistance; When beginning deterioration, when resistance reduces to 10 ~ 300M Ω, its heating power is greater than the heating power of normal insulation, and temperature rise ratio normal insulation wants high; When resistance reduces to below 5M Ω, on it, spread voltage is very low, and heating power is less than the sub-heating power of normal insulation, and temperature rise ratio normal insulation is low.
When pollution severity appears in insulator surface, because porcelain vase surface filth layer makes surface resistance reduce, obviously increased by the creepage Leakage Current on porcelain dish surface, thus cause porcelain dish surface temperature rise to increase.Therefore, filthy serious insulator thermal imagery feature is that porcelain dish temperature rise is higher than the thermal imagery without the temperature rise of contaminated insulator porcelain dish.Under normal circumstances, because faulty insulator temperature rise is very small, traditional thermal imaging system is difficult to accurate identification, and the methods such as high sensitivity thermal imaging system and image enhaucament must be adopted to carry out fault detect.
Because insulator there will be fault, thus need to detect insulator, to know its current performance.The detection mode adopting directly contact at present more.What adopt is spark fork method, sound equipment fork, charged insulating resistance measuring instrument, and these detection methods all need to carry out contact measurement with insulator chain, need to step on bar and just can detect; But the working strength of testing staff and danger are also very large, and the efficiency of testing is very low.So domestic a lot of circuit all adopts the mode of sampling observation to carry out the detection of low value and zero resistance insulator, this is 6 ‰ for annual deterioration rate, and its quantity detected is far from being enough.
Be specifically described with sound equipment fork method: operating personnel stand on shaft tower, a hand-held radicle is equipped with the insulating bar of fork-shaped electrode and discharging gap audio alerting unit, with the potential change metallic member at fork-shaped Electrode connection insulator two ends, according to the electric discharge sound, audible alarm sound, insulating resistance value etc., judge the quality of tested insulator.
To sum up, the existing scheme detected insulator, needs direct contact measurement, and danger is large, workload is large, inefficiency.
Summary of the invention
The invention provides a kind of method and apparatus detected insulator, the method can realize adopting cordless to detect insulator, improves detection efficiency, saves workload.
The invention provides a kind of method and apparatus detected insulator, this device can realize adopting cordless to detect insulator, improves detection efficiency, saves workload.
To the method that insulator detects, the method comprises:
Aircraft receives the control signal about azimuth information, flies according to azimuth information;
Aircraft obtains the current value of insulator position electromagnetic field inducing, and current value is real-time transmitted to analytical equipment;
Analytical equipment is by current value change curve determination insulator whether fault.
To the equipment that insulator detects, this equipment comprises aircraft and analytical equipment, carry sensors in described aircraft;
Described aircraft, receives the control signal about azimuth information, flies according to azimuth information; Obtain the current value of insulator position electromagnetic field inducing, current value is real-time transmitted to described analytical equipment;
Described analytical equipment, by current value change curve determination insulator whether fault.
As can be seen from such scheme, the present invention is carry sensors on board the aircraft, and aircraft receives the control signal about azimuth information, flies according to azimuth information; Obtain the current value of insulator position electromagnetic field inducing, current value is real-time transmitted to analytical equipment; Analytical equipment is by current value change curve determination insulator whether fault.The current value of the sensor that the present invention adopts aircraft to carry to insulator position electromagnetic field inducing is measured, and analytical equipment is again according to current value determination insulator whether fault.Adopt noncontact scheme of the present invention, climb on shaft tower without the need to staff and direct contact measurement is carried out to insulator; Thus, improve detection efficiency, reduce security risk, save workload.
Accompanying drawing explanation
Fig. 1 is the method indicative flowchart that the present invention detects insulator;
Fig. 2 is the device structure schematic diagram that the present invention detects insulator;
Fig. 3 is the faradic structural representation example of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention has combined the detection to insulator by aircraft and analytical equipment, particularly: adopt the current value of sensor to insulator position electromagnetic field inducing that carry of aircraft to measure, analytical equipment is again according to current value determination insulator whether fault.Adopt noncontact scheme of the present invention, climb on shaft tower without the need to staff and direct contact measurement is carried out to insulator.
See Fig. 1, be the method indicative flowchart that the present invention detects insulator, the method is carry sensors on board the aircraft, and this aircraft flies under the control of telepilot, and current existing flight equipment can be adopted to realize, as micro helicopter.Can generate an electromagnetic field around insulator under normal condition, the present invention is sensor installation in aircraft, and sensor, near insulator, is responded to insulator position electromagnetic field, obtained induction current.
The flow process of Fig. 1 comprises the following steps:
Step 101, aircraft receives the control signal about azimuth information, flies according to azimuth information.
Telepilot carries out orientation control to aircraft.
Step 102, aircraft obtains the current value of insulator position electromagnetic field inducing, and current value is real-time transmitted to analytical equipment.
Carry-on sensor carries out electric current induction in real time, to obtain the current value of its position; When aircraft arrives insulator position, the current value produced by insulator electromagnetic field inducing, is the current value of corresponding insulator.
The electric current of a certain position electromagnetic field inducing is measured, can realize by various ways, such as, with the sensor circuit measuring current value.
Step 103, analytical equipment is by current value change curve determination insulator whether fault.
The implementation of this step has multiple, is illustrated below.
Know along insulator flight after the current value that records, according to current value change, just can determine insulator whether fault.Current value reflects corresponding potential value, and potential value reflects insulator resistance situation.If insulator is normal, current value becomes regular change, as it is changed to smooth curve.Thus, if current value change changes inconsistent with the rule under normal condition, then insulator breakdown can be determined; Such as: if current value change does not become smooth curve, have depression, then can determine insulator breakdown.
Determine insulator whether fault, can set as required, such as, if curent change and normal condition are not attached, just be defined as fault.For another example:
If current value is in normal variation scope, then determine that insulator is normal;
If curent change is greater than 0 and not in normal range, then determine that insulator is low resistance insulator;
If curent change equals 0, then determine that insulator is zero resistance insulator.
If insulator is normal, the current value recorded within the scope of normal variation, if not within the scope of normal variation, then should break down.
When determining insulator breakdown (comprising low resistance insulator or zero resistance insulator), the method also can comprise further:
Generate the warning information about low value or null value;
Carry out alarm prompt.
Based on alarm, just follow-up maintenance can be carried out.
The present invention is carry sensors on board the aircraft, and aircraft receives the control signal about azimuth information, flies according to azimuth information; Obtain the current value of insulator position electromagnetic field inducing, current value is real-time transmitted to analytical equipment; Analytical equipment is by current value change curve determination insulator whether fault.The current value of the sensor that the present invention adopts aircraft to carry to insulator position electromagnetic field inducing is measured, and analytical equipment is again according to current value determination insulator whether fault.Adopt noncontact scheme of the present invention, climb on shaft tower without the need to staff and direct contact measurement is carried out to insulator; Thus, improve detection efficiency, reduce security risk, save workload.
See Fig. 2, be the equipment that the present invention detects insulator, this equipment comprises aircraft and analytical equipment, carry sensors in described aircraft;
Described aircraft, receives the control signal about azimuth information, flies according to azimuth information; Obtain the current value of insulator position electromagnetic field inducing, current value is real-time transmitted to described analytical equipment;
Described analytical equipment, by current value change curve determination insulator whether fault.
Preferably, described aircraft comprises flight module, induction module, first set wireless transport module and the second cover wireless transport module; Described telepilot comprises the 3rd cover wireless transport module, and described analytical equipment comprises the 4th cover and analyzes transport module and analysis module;
Described first set wireless transport module, receives the control signal about azimuth information from described 3rd cover wireless transport module, sends to described flight module;
Described flight module, receives the control signal from described first set wireless transport module, flies according to azimuth information;
Described induction module, obtains the current value of insulator position electromagnetic field inducing, sends to described analysis module by the second cover wireless transport module;
Described second cover wireless transport module, by the current value from described induction module, sends to described 4th cover wireless transport module;
Described 4th cover wireless transport module, receives the current value from described second cover wireless transport module, sends to described analysis module;
Described analysis module, by current value change curve determination insulator whether fault.
This analytical equipment can adopt PC to realize, and it is overlapped wireless transport module carried out wireless connections by two of two cover wireless transport modules and aircraft, such as, set up short-distance wireless WIFI and connect, and carries out the mutual of steering order and image data between the two by WIFI.
Preferably, described induction module comprises sensor, and the sensor circuit on sensor is responded to current location electromagnetic field, produces induction current, obtains current value; Described sensor circuit is made up of emitter, collector and current acquisition unit, and the potential change of emitter, collector induction pick-up point, the electric current between the two poles of the earth is measured by current acquisition unit.
The electric current of a certain position electromagnetic field inducing is measured, can realize by various ways, such as, with the sensor circuit measuring current value.As shown in Figure 3, be an instantiation of sensor circuit, the sensor circuit on sensor is responded to current location electromagnetic field, produces induction current, obtains current value; Described sensor circuit is made up of emitter, collector and current acquisition unit.
During specific implementation Fig. 3 circuit, can in the glass of a vacuum or quartzy closed container, device metal emitter and collector, the potential change of two electrode induction pick-up points, measures the electric current between two electrodes with electric current collecting unit (A namely shown in figure).Suppose without any light beam irradiation in emitter, then owing to being open circuit situation between emitter and collector, the electric current that current acquisition unit is measured is zero.Suppose there is light beam in irradiation emitter, give suitable light frequency, voltage conditions, then current acquisition unit can measure electric current.When the light of fixed frequency is irradiated on emitter by light mouth, emitter overflows photoelectron, and during change along with applying electrical potential, the quantity that photoelectron overflows can change, thus the electric current detected changes; The size of place electromagnetic field electromotive force instead can be released by the size of curent change.Utilize this principle the change of sensor place electric field, electromotive force just can be detected.The potential change of low value, zero resistance insulator both sides much smaller than the change of normal insulation two ends electromotive force, so low value, zero resistance insulator can be judged.
Preferably, described analysis module comprises electromotive force determination submodule and fault determination submodule;
Described analysis module comprises fault determination submodule;
Described fault determination submodule, by curent change determination insulator whether fault, particularly: if curent change is in normal range, then determines that insulator is normal; If curent change is greater than 0 and not in normal range, then determine that insulator is low resistance insulator; If curent change equals 0, then determine that insulator is zero resistance insulator.
Preferably, described analytical equipment also comprises alarm module;
Described fault determination submodule, determine insulator be low resistance insulator or zero resistance insulator time, send alarm command to described alarm module;
Described alarm module, generates the warning information about low value or null value; Carry out alarm prompt.
Aircraft is with telepilot.During specific implementation, on ground, testing staff controls acting on one's own of aircraft by telepilot, and keeps the detecting distance with insulator chain 20cm.The climb of aircraft can be controlled in 5 meter per seconds, and the duration of ascent of such aircraft can control within 20 seconds, and speeds control during detection, at 0.2 meter per second, controls within one minute the detection time of every phase insulator.In order to improve Detection results, aircraft is isolation material, can be up to 750kV by withstand high pressures, and aircraft can use on the height of height above sea level 5000m, and aircraft adopts aviation gasoline as power.Using in transformer station to adopt lithium battery as power.Research and development are applicable to on-the-spot low value, zero resistance insulator detection management system, and making to detect data can by comparing, analyzing for line data-logging provides more data supporting.
In practice, aircraft comprises power system, flight instruments, and flight instruments can be made up of in one plane equidistant arrangement 4 rotary fans; Power system is made by central processing unit (comprising sensor), target homing system, gyroscope, Position Fixing Navigation System.
Aircraft is by transmission of wireless signals information, and by the operation of testing staff, monitored insulator chain found by the aircraft controlling carry sensors, checks one by one the every a slice insulator in insulator chain, simple to operate, detect accurately.
The present invention utilizes aircraft carry sensors to detect, and just can carry out the detection of low value, zero resistance insulator to multi-form insulator chain, can be used for the insulator chain low value zero value detection of monitoring substation.Aircraft can carry out multi-group data collection, improves transformer station's low value, zero resistance insulator accuracy of detection, reduces the danger of staff, improve work efficiency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. to the method that insulator detects, it is characterized in that, on board the aircraft carry sensors, the method comprises:
Aircraft receives the control signal about azimuth information, flies according to azimuth information;
Aircraft obtains the current value of insulator position electromagnetic field inducing, and current value is real-time transmitted to analytical equipment;
Analytical equipment is by current value change curve determination insulator whether fault.
2. the method for claim 1, is characterized in that, the current value that described aircraft obtains insulator position electromagnetic field inducing comprises:
Sensor circuit on sensor is responded to current location electromagnetic field, produces induction current, obtains current value; Described sensor circuit is made up of emitter, collector and current acquisition unit, and the potential change of emitter, collector induction pick-up point, the electric current between the two poles of the earth is measured by current acquisition unit.
3. the method for claim 1, is characterized in that, by current value change curve determination insulator, whether fault comprises described analytical equipment:
If curent change is in normal range, then determine that insulator is normal;
If curent change is greater than 0 and not in normal range, then determine that insulator is low resistance insulator;
If curent change equals 0, then determine that insulator is zero resistance insulator.
4. the method as described in claim 1,2 or 3, is characterized in that, when determining insulator breakdown, the method also comprises:
Generate the warning information about low value or null value;
Carry out alarm prompt.
5. to the equipment that insulator detects, it is characterized in that, this equipment comprises aircraft and analytical equipment, carry sensors in described aircraft;
Described aircraft, receives the control signal about azimuth information, flies according to azimuth information; Obtain the current value of insulator position electromagnetic field inducing, current value is real-time transmitted to described analytical equipment;
Described analytical equipment, by current value change curve determination insulator whether fault.
6. equipment as claimed in claim 5, is characterized in that, described aircraft comprises flight module, induction module, first set wireless transport module and the second cover wireless transport module; Described telepilot comprises the 3rd cover wireless transport module, and described analytical equipment comprises the 4th cover and analyzes transport module and analysis module;
Described first set wireless transport module, receives the control signal about azimuth information from described 3rd cover wireless transport module, sends to described flight module;
Described flight module, receives the control signal from described first set wireless transport module, flies according to azimuth information;
Described induction module, obtains the current value of insulator position electromagnetic field inducing, sends to described analysis module by the second cover wireless transport module;
Described second cover wireless transport module, by the current value from described induction module, sends to described 4th cover wireless transport module;
Described 4th cover wireless transport module, receives the current value from described second cover wireless transport module, sends to described analysis module;
Described analysis module, by current value change curve determination insulator whether fault.
7. equipment as claimed in claim 6, it is characterized in that, described induction module comprises sensor, and the sensor circuit on sensor is responded to current location electromagnetic field, produces induction current, obtains current value; Described sensor circuit is made up of emitter, collector and current acquisition unit, and the potential change of emitter, collector induction pick-up point, the electric current between the two poles of the earth is measured by current acquisition unit.
8. the equipment as described in claim 5,6 or 7, is characterized in that, described analysis module comprises fault determination submodule;
Described fault determination submodule, by curent change determination insulator whether fault, particularly:
If curent change is in normal range, then determine that insulator is normal;
If curent change is greater than 0 and not in normal range, then determine that insulator is low resistance insulator;
If curent change equals 0, then determine that insulator is zero resistance insulator.
9. equipment as claimed in claim 8, it is characterized in that, described analytical equipment also comprises alarm module;
Described fault determination submodule, determine insulator be low resistance insulator or zero resistance insulator time, send alarm command to described alarm module;
Described alarm module, generates the warning information about low value or null value; Carry out alarm prompt.
10. equipment as claimed in claim 8, is characterized in that, described aircraft is insulation aircraft.
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| CN201410705956.1A CN104483561A (en) | 2014-11-28 | 2014-11-28 | Method and equipment for detecting insulator |
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| CN201410705956.1A CN104483561A (en) | 2014-11-28 | 2014-11-28 | Method and equipment for detecting insulator |
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| CN106707105A (en) * | 2016-12-29 | 2017-05-24 | 山东鲁能智能技术有限公司 | Movable flying electric power acquisition terminal and acquisition method |
| CN106932694A (en) * | 2017-03-16 | 2017-07-07 | 广州供电局有限公司 | Insulator deterioration detecting device |
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Application publication date: 20150401 |