CN104950179A - Insulation resistance measuring device for insulator string detection robot - Google Patents

Insulation resistance measuring device for insulator string detection robot Download PDF

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Publication number
CN104950179A
CN104950179A CN201510268210.3A CN201510268210A CN104950179A CN 104950179 A CN104950179 A CN 104950179A CN 201510268210 A CN201510268210 A CN 201510268210A CN 104950179 A CN104950179 A CN 104950179A
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CN
China
Prior art keywords
insulator
circuit
insulation resistance
processing unit
central processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510268210.3A
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Chinese (zh)
Inventor
李学刚
周文涛
李东利
陈建民
王朝阳
杜慧斌
李马骁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, State Grid Tianjin Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510268210.3A priority Critical patent/CN104950179A/en
Publication of CN104950179A publication Critical patent/CN104950179A/en
Pending legal-status Critical Current

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Abstract

An insulation resistance measuring device for an insulator string detection robot comprises a central processing unit, an acquisition circuit, a trigger circuit, a booster circuit, a bypass capacitor, two detection probes and an output power supply, wherein the central processing unit is respectively connected with the acquisition circuit and the trigger circuit, the acquisition circuit is connected with the detection probes, the trigger circuit is connected with the booster circuit, the booster circuit is connected with the bypass capacitor, the bypass capacitor is connected with the detection probes, the two detection probes are arranged on steel caps on two sides of an insulator to be measured respectively, and the output power supply is respectively connected with the central processing unit and the booster circuit. The insulation resistance measuring device for the insulator string detection robot has the advantages that the resistance value of the insulator to be measured can be accurately detected, the performance state of the insulator can be judged according to the resistance value, the state of an insulator string is conveniently maintained, workload can be decreased, and measuring accuracy and safety are improved.

Description

A kind of insulation resistance measuring device for insulator chain measuring robots
Technical field
The invention belongs to technical field of insulation detection, particularly relate to a kind of insulation resistance measuring device for insulator chain measuring robots.
Background technology
Insulator is a kind of special insulation control, and it can play an important role in overhead transmission line.Many years, front insulator was used for electric pole, and slowly develop the one end connecting tower in high type high-tension bus-bar and hung the insulator of a lot of plate-like, it is made up of glass or pottery usually in order to increase creepage distance, is just insulator.Insulator should not to change the various dynamo-electric stress that causes and losing efficacy due to environment and electric load condition, otherwise insulator would not produce great effect, will damage use and the operation life of whole piece circuit.
Insulator is made up of insulator and metal-ware, can be divided into line insulator, transformer station's support insulator and sleeve pipe, can be divided into porcelain, glass and organic composite insulator by material by purposes.
(1) there is deteriorated problem in porcelain insulator, and it is large that deterioration detects workload, once not detect in time, just likely causes disconnected string when thunderbolt or pollution flashover.
(2) glass insulator due to manufacturing defect or filthy leakage current excessive, there is " from sudden and violent " phenomenon.Glass insulator should be changed in time after broken, makes the disconnected string of insulator chain to prevent from causing residual vertical electric insulator steel foot to blow in thunderbolt and pollution flashover.
(3) puncture the possibility with core brittle fracture in composite insulator Presence of an interface, and all there is very large uncertainty in the long-term reliability of the serviceable life of organic material and bonding pad, end.
Overhead transmission line refers to be set up on ground, utilizes insulator and air-insulated power circuit, is made up of parts such as wire, aerial earth wire, insulator chain, shaft tower, earthing device.Compared with underground transmission line, overhead construction cost is low, and short construction period is easy to repair and maintenance.Therefore, the main power transmission mode adopted since overhead transmission line transmission of electricity is electric power industry development.Usually alleged transmission line of electricity just refers to overhead transmission line.The power house of different regions, transformer station, load point are coupled together by overhead transmission line, conveying or exchange electric energy, form electric power networks or the power distribution network of various electric pressure.
The singularity of overhead transmission line porcelain insulating substring because of its installation site and the popularity of distributed areas, it is a difficult point of isolator detecting always, finding effective detection method both at home and abroad always, so far existing with ultrasonic Detection Method, laser-Doppler vibratory drilling method and the infra-red thermal imaging instrument method Non-Electricity Measurement method that is representative and the electrical measurement method that is representative with voltage's distribiuting detection method, insulation resistance method and pulse current method, by trial for solving isolator detecting problem.These methods have detected the state of insulator operation at different aspect, but in actual motion, have tittle to be difficult to detect, and checkout equipment are quite expensive; Depend merely on certain tittle and be difficult to objective judgement insulator running status.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of insulation resistance measuring device for insulator chain measuring robots.
In order to achieve the above object, the insulation resistance measuring device for insulator chain measuring robots provided by the invention comprises: CPU (central processing unit), Acquisition Circuit, trigger circuit, booster circuit, shunt capacitance, two detector probe and out-put supply; Wherein: CPU (central processing unit) is connected with trigger circuit with Acquisition Circuit respectively, Acquisition Circuit is connected with detector probe, trigger circuit are connected with booster circuit, booster circuit is connected with bypass circuit, shunt capacitance is connected with detector probe, two detector probe are separately positioned on the both sides steel cap of insulator to be measured, and out-put supply is connected with booster circuit with CPU (central processing unit) respectively.
The model of described CPU (central processing unit) is C8051F330, and it take microprocessor chip as the controller circuitry of core.
Described out-put supply is direct current 5V power supply.
The result of use of the insulation resistance measuring device for insulator chain measuring robots provided by the invention: the resistance value that can detect insulator to be measured exactly, and the performance state of insulator can be judged according to this resistance value, be convenient to the repair based on condition of component carrying out insulator chain, can workload be reduced, improve accuracy of measurement and security.
Accompanying drawing explanation
Fig. 1 is insulator chain measuring robots structural representation.
Fig. 2 is the insulation resistance measuring device composition frame chart for insulator chain measuring robots provided by the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the insulation resistance measuring device for insulator chain measuring robots provided by the invention is described in detail.
Fig. 1 is insulator chain measuring robots structural representation.As shown in Figure 1, the general structure of insulator chain measuring robots comprises: mobile body 20, hold-fast body 21, driving mechanism 22, cross travel mechanism 23, testing agency 24 and battery control box 25.In order to weight reduction, on it, parts major part adopts hard aluminium alloy material.When robot is used for the detection of level insulation substring, the basis of Fig. 1 adds auxiliary support mechanism 26.
Described mobile body 20 adopts the mode of encircling insulator, side is left opening and is convenient to robot to be inserted in insulator chain, mobile body 20 is fixed with some sled shape guide poles, play the guiding role in traveling process, because considering insulation and anti-scratch problem, guide pole adopts insulating material.Hold-fast body 21 provides the enclasping force being adjacent to insulator for robot, and the source of power is divided into two parts, and one is the torsion of each hinged place, and two is coupling mechanism forces of opening part.Torsion is provided by torsion spring.Coupling mechanism force is provided by extension spring temporarily, because extension spring can carry out follow-up adjustment by the stressing conditions of random device people in motion process, and has buffer action, can meet again the robot moment to hold the requirement on insulator chain tightly.
Cross travel mechanism 23 has two identical cross brackets, can synchronously be swayed by gear transmission, and the end of cross bracket is provided with large trundle, and consider that roller contacts with insulator closely, therefore roller material selects insulating material.Driving mechanism 22 adopts motor output torque, the cross travel mechanism 23 at homonymy engagement gear wheel place is passed to by motor pinion, then the pinion wheel that gear wheel is engaged with by below drives transmission shaft moment of torsion to be passed to the cross travel mechanism 23 of opposite side gears meshing, completes the transmission of power and ensure both sides cross travel mechanism 23 synchronous axial system with this.
What insulator chain measuring robots may be used for porcelain insulating substring on overhead transmission line stops (band) electro-detection, is applicable to the porcelain insulating substring that level and pendency are arranged, possesses insulation measurement function, and judge Faulty insulator with this.The insulation resistance of insulator refers to the resistance of the insulator at separately insulator the two poles of the earth, and after the performance degradation of insulator, its insulation resistance reduces, when insulation resistance reduces to 10-300 megaohm, be called " low resistance insulator ", when insulation resistance is reduced to below 5 megaohms, be called " zero resistance insulator ".High voltage direct current is applied directly on the both sides steel cap of insulator to be measured by metal probe by this insulation resistance measuring device, and by the power frequency ac voltage that originally acted on the insulator by shunt capacitance filtering, utilize Acquisition Circuit Bian collection from the electric current of insulator, calculated the resistance value of insulator by CPU (central processing unit) according to Ohm law.Because transmission line of electricity electromagnetic environment is complicated, also there is various Leakage Current in insulator, so the filtering process of being correlated with must be carried out.
This insulator chain measuring robots adopts insulation resistance measuring device provided by the invention when carrying out insulation measurement.
As shown in Figure 2, the insulation resistance measuring device for insulator chain measuring robots provided by the invention comprises:
CPU (central processing unit) 1, Acquisition Circuit 2, trigger circuit 3, booster circuit 4, shunt capacitance 5, two detector probe 6 and out-put supply 8; Wherein: CPU (central processing unit) 1 is connected with trigger circuit 3 with Acquisition Circuit 2 respectively, Acquisition Circuit 2 is connected with detector probe 6, trigger circuit 3 are connected with booster circuit 4, booster circuit 4 is connected with bypass circuit 5, shunt capacitance 5 is connected with detector probe 6, two detector probe 6 are separately positioned on the both sides steel cap 7 of insulator to be measured, and out-put supply 8 is connected with booster circuit 4 with CPU (central processing unit) 1 respectively.
The model of described CPU (central processing unit) 1 is C8051F330, it take microprocessor chip as the controller circuitry of core, for the control core of this device, C8051F320 is because of itself low-power consumption, the feature such as volume is little, the method for operation is flexible and being used widely, and owing to being fully-integrated mixed signal SOC (system on a chip) type MCU, therefore use also easier; Acquisition Circuit 2 is current sampling circuit, for gathering the electric current of insulator; Trigger circuit 3 are used for triggering high voltage direct current, and are applied on insulator to be measured; Booster circuit 4 obtains high voltage direct current for the electric current provided by out-put supply 8 carries out boosting; Shunt capacitance 5 is the electric capacity radio-frequency component bypass in the AC signal containing high-frequency current and low-frequency current filtered, and can originally act on the power frequency ac voltage filtering on insulator to be measured; Detector probe 6 is metal current probe, is used for detecting the electric current on insulator, and the big current probe shank on it adopts on thermal treatment beryllium copper nickel and plates thick gold, and product has wear-resisting, and resistance is low, easily contacts, and not easily produces electric spark, by advantages such as electric current are larger; Out-put supply 8 is direct current 5V power supply, and it both can be used as the startup power supply of CPU (central processing unit) 1, also can obtain high voltage direct current for booster circuit 4.
Now the course of work of the insulation resistance measuring device for insulator chain measuring robots provided by the invention is described below: when needing the resistance detecting insulator, first by staff, two detector probe 6 are set directly on the both sides steel cap 7 of insulator to be measured, then this device is started, by booster circuit 4, the electric current that out-put supply 8 exports is boosted, the output of above-mentioned high voltage direct current controls at 30KV by trigger circuit 3 by CPU (central processing unit) 1 simultaneously, and filter out original effect power frequency ac voltage on the insulator by shunt capacitance 5, the two ends of insulator to be measured are applied to finally by detector probe 6.Then gathered through Acquisition Circuit 2 by detector probe 6 by the electric current of insulator to be measured, then send CPU (central processing unit) 1 to.CPU (central processing unit) 1 calculates the resistance value of this insulator according to Ohm law according to the voltage swing at insulator two ends to be measured and the size of current that collects, and judge the performance state of this insulator according to this resistance value.

Claims (3)

1. for an insulation resistance measuring device for insulator chain measuring robots, it is characterized in that: it comprises: CPU (central processing unit) (1), Acquisition Circuit (2), trigger circuit (3), booster circuit (4), shunt capacitance (5), two detector probe (6) and out-put supply (8); Wherein: CPU (central processing unit) (1) is connected with trigger circuit (3) with Acquisition Circuit (2) respectively, Acquisition Circuit (2) is connected with detector probe (6), trigger circuit (3) are connected with booster circuit (4), booster circuit (4) is connected with bypass circuit (5), shunt capacitance (5) is connected with detector probe (6), two detector probe (6) are separately positioned on both sides steel cap (7) of insulator to be measured, and out-put supply (8) is connected with booster circuit (4) with CPU (central processing unit) (1) respectively.
2. the insulation resistance measuring device for insulator chain measuring robots according to claim 1, it is characterized in that: the model of described CPU (central processing unit) (1) is C8051F330, it take microprocessor chip as the controller circuitry of core.
3. the insulation resistance measuring device for insulator chain measuring robots according to claim 1, is characterized in that: described out-put supply (8) is direct current 5V power supply.
CN201510268210.3A 2015-05-25 2015-05-25 Insulation resistance measuring device for insulator string detection robot Pending CN104950179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510268210.3A CN104950179A (en) 2015-05-25 2015-05-25 Insulation resistance measuring device for insulator string detection robot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510268210.3A CN104950179A (en) 2015-05-25 2015-05-25 Insulation resistance measuring device for insulator string detection robot

Publications (1)

Publication Number Publication Date
CN104950179A true CN104950179A (en) 2015-09-30

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1657962A (en) * 2004-07-02 2005-08-24 武汉奋进电力技术有限公司 AC-DC high-voltage insulator passive tester
CN102621430A (en) * 2012-03-31 2012-08-01 山东电力研究院 Intelligent detection robot system for horizontal insulator strings
CN102621429A (en) * 2012-04-01 2012-08-01 山东鲁能智能技术有限公司 Horizontal duplex insulator string on-line detection robot
CN203287436U (en) * 2013-04-27 2013-11-13 国家电网公司 Insulator detection robot based on WIFI network communications

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1657962A (en) * 2004-07-02 2005-08-24 武汉奋进电力技术有限公司 AC-DC high-voltage insulator passive tester
CN102621430A (en) * 2012-03-31 2012-08-01 山东电力研究院 Intelligent detection robot system for horizontal insulator strings
CN102621429A (en) * 2012-04-01 2012-08-01 山东鲁能智能技术有限公司 Horizontal duplex insulator string on-line detection robot
CN203287436U (en) * 2013-04-27 2013-11-13 国家电网公司 Insulator detection robot based on WIFI network communications

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郭锐等: "绝缘子串检测机器人的研制", 《第四届全国架空输电线路技术交流研讨会论文集》 *

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