CN103529303A - Manual zero-value detection device for double-string tension insulators of 750 kV circuit - Google Patents
Manual zero-value detection device for double-string tension insulators of 750 kV circuit Download PDFInfo
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- CN103529303A CN103529303A CN201310512778.6A CN201310512778A CN103529303A CN 103529303 A CN103529303 A CN 103529303A CN 201310512778 A CN201310512778 A CN 201310512778A CN 103529303 A CN103529303 A CN 103529303A
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Abstract
The invention discloses a manual zero-value detection device for double-string tension insulators of a 750 kV circuit. The manual zero-value detection device comprises a framework (4), a controller (7) and a detection mechanism (6), wherein the middle part of the framework (4) is located in a middle-lower position between two strings of the insulators, and belt travelling mechanisms are located at upper parts of two sides of the framework (4) respectively; an insulation rod connection lug (5) is arranged at the upper part of the middle of the framework (4); under the drag of the belt travelling mechanisms, the framework (4) advances in an axis direction of the insulators (1) and stops temporarily when reaching a measurement position of each insulator (1); and two detection arms of the detection mechanism extend into positions of connection steel shafts of adjacent insulators (1), measure the resistance values of the insulators (1) and find and replace degraded low-value or zero-value insulators in time. The manual zero-value detection device has the advantages as follows: the device is simple, the operation is convenient, the working efficiency of detection is high, and the labor intensity is low.
Description
Technical field
The present invention relates to a kind of for 750kV extra high voltage network hot line job insulator pick-up unit, particularly a kind of device that two strings of strain insulators is carried out to charged manual zero value detection.
Background technology
Insulator is the critical elements of overhead transmission line, and its effect is that live wire and ground are kept apart effectively, makes them keep current potential separately.In service at circuit, insulator bears the impact of the effect of high voltage, mechanical load and the variation of physical environment for a long time, makes it aging or damaged, causes insulator dielectric level to decline, and threatens the safe operation of circuit.
According to the requirement in DL/T596-1996 " power equipment preventive trial rules ", the insulation resistance of every suspended insulator lower than prescribed level, is generally just thought low value or zero resistance insulator.For guaranteeing the normal operation of insulator, detecting in time low value or zero resistance insulator becomes frequent and important task in transmission line of electricity operation maintenance work, is also the difficult problem that in producing at present, urgent need will solve.
Transmission line of electricity band electro-detection anchor support zero resistance insulator, the general sparking distance method that adopts detects, the features such as the difficult observation of existence and accuracy of measurement are poor, particularly 750kV strain tower of transmission line insulator sheet number is more, general single string is between 35-53 sheet, testing tool is long and heavy, and operation is not only wasted time and energy, and is also not easy to long-distance transport.
Summary of the invention
Order of the present utility model is two charged insulator null value or the low value detection devices of manually carrying out of insulator string of a kind of 750kV of being applicable to power line tension of design, this device can be in charged situation, and manual, quick and easy carries out low value or zero value detection to two insulator strings; Can measure quantitatively the resistance value of every a slice insulator, thereby the accurate and effective insulator that completes detects and evaluation work.
The technical scheme that the present invention proposes is:
The two manual zero value detection devices of insulator string of 750kV line tension, is characterized in that, it comprises:
Framework: the center section of described framework is arranged between two insulator string strings position on the lower side, synchronous belt and synchronous pulley form belt travel mechanism, belt travel mechanism lays respectively at framework two upper lateral parts, and the synchronous belt of synchronous walking mechanism is fitted in the top of insulator chain; Center section top at framework is provided with insulating bar connecting lug, drags stepping on insulator chain walk by insulating bar; The rigid structure that framework is connected and composed by section bar; Across at least plural insulator;
Testing agency: consist of gage beam, connecting rod, spring and electromagnetic switch valve, the distance between two sounding rods that gage beam stretches out equals the length of an insulator, gage beam passes through connecting rod, spring and electromagnetic switch valve active link on framework; Electromagnetic switch valve is electrically connected to executive component driving circuit; The rear end of two sounding rods of testing agency's gage beam is connected with the signal acquisition circuit of controller inside, and the steel of front end and adjacent two insulators is coupling and touches the electric leakage information that gathers;
Controller: comprise intelligent control unit CPU, DC power-supply circuit, high-voltage inverter circuit, rectification circuit, high tension protection circuit, signal sample circuit, storer, switching value output and latch cicuit, digital output and latch cicuit, executive component driving circuit, communication interface circuit; This field controller shell is that the iron sheet part that magnetic conduction is good is made, the interference of shielding strong-electromagnetic field; This controller is fixed on framework;
Power supply: give respectively testing agency and controller power supply;
Computing machine: be placed on ground, built-in wireless communication module, and between the communication interface modules of the field controller on insulator, carry out radio communication, controller is sent to operational order, receive in real time, record measurement data, and measurement result is processed, shows and recorded to these data analysis;
Described framework selects that density is little, the section bar of good rigidly, material that insulating property are good;
Further, framework is selected glass epoxy silk extubation tube P850 material;
This insulation detection device can be used for detecting two charged low value or the zero value detection of carrying out of insulator string of 35-750kV power line tension, has following characteristics: can realize real-time online and detect; Testing result quantification, detects the resistance value of every a slice insulator quantitatively; To low value or zero resistance insulator automatic alarm; Detect data energy real time record, demonstration and storage; The broad scope of application, is applicable to detect various electric pressures, various types of line insulator; Apparatus is simple, easy to operate, testing efficiency is high, labour intensity is low.
Accompanying drawing explanation
Fig. 1 is principle of the invention block diagram;
Fig. 2 is controller principle block diagram.
Fig. 3 embodiment of the present invention structural front view;
The attached view of Fig. 4 embodiment of the present invention structure;
Fig. 5 embodiment of the present invention structure left view;
In figure, 1-insulator, 2-synchronous pulley, 3-synchronous belt, 4-framework, 5-insulating bar connecting lug ，6-testing agency, 7-controller, 8-power supply, 9-wireless communication module, 10-computing machine.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Be illustrated in figure 1 principle of the invention block diagram, the two manual zero value detection devices of insulator string of 750kV line tension, comprise mechanical part and electric control system, mechanical part comprises testing agency 6, framework 4, testing agency 6 is fixed on framework 4, and electric part is mainly by controller 7 and computing machine 10, controller 7 is encapsulated in can, and can is fixed on framework 4, power supply 8 is also fixed on framework 4 Shang，Wei testing agencies 6 and controller 7 power supplies, and 7 pairs of testing agencies 6 of controller send operation and work order, computing machine 10 is positioned at ground, the built-in wireless communication module 9 of computing machine 10, between controller 7 and computing machine 8, can realize radio communication, during work, framework 4 rides on the double insulator string consisting of insulator 1, aerial operation personnel pull framework 4 with insulating bar, framework 4 is walked on two insulator strings by belt travel mechanism, when the detection arm of testing agency 6 arrives between adjacent insulator, controller 7 is according to 6 work of default driven by program testing agency, the detection arm of testing agency 6 is overlapped on the steel axle of two adjacent insulators 1, test leakage current and voltage, and the electrical leakage voltage of insulator 1 is detected and is transported to controller 7 storages obtaining result, controller 7 sends to computing machine 10 data wireless in real time, 10 pairs of measured data analysis of computing machine calculate, draw in real time the resistance value of every a slice insulator 1.According to default safe Resistance index, the quality of judgement insulator 1.
Be illustrated in figure 2 the theory diagram of controller, the core component of controller 7 is intelligent cell CPU; Configuring direct current feed circuit, high-voltage inverter circuit, rectification circuit, high tension protection circuit, signal sample circuit, switching value output and latch cicuit, digital output and latch cicuit, executive component driving circuit, communication interface circuit;
Circuit functions is as follows:
DC circuit: be the working power of native system, provided by accumulator, due in work high above the ground, consider volume and weight, this accumulator is selected 20Ah12V lead-acid accumulator.Then adopt DC-DC translation circuit, be transformed to that control circuit needs+3V ,+5V ,-5V ,-12V, together with accumulator itself+12V totally 5 kinds of power supplys, for controller 7, work power supply be provided.
High voltage generation circuit: be mainly to produce to detect the high-voltage pulse needing, the alternating current that need to be 50Hz by direct current 12V power inverter, by transformer, boost to 3000V again, rectification is direct current again, then the alternating current by 10 pairs of circuits of computing machine carries out zero passage detection, determine the load time of high-voltage pulse, voltage on insulator 1 is lower than the time interval of 3000V, by the break-make to thyristor (controllable silicon), control, produce high-voltage pulse, be loaded into and detect loop, thereby in testing agency 6, obtain corresponding pulse current and pulse signal voltage.
High tension protection circuit: have two cover high tension protection circuits, a set of (the highest from the voltage of sharing on the nearest insulator of power transmission line for the high pressure on isolated insulation 1, can reach more than 30,000 volts), make it be unlikely to scurry into control testing circuit, with protection controller 7; Another set of for the protection of controllable silicon.
Signal sample circuit: high frequency pulse AC signal, is converted to direct current signal, so that proofread and correct and demarcate.Designing requirement to circuit is that input impedance is high, exports Low ESR low.And reduce as far as possible the response time of circuit, so that subsequent conditioning circuit Quick Measurement.Consider effective value and average, the relation of first-harmonic and harmonic wave, the most possibly interference of reduced harmonic simultaneously.
Signal correction and modulate circuit: the signal of rectification circuit output, by correcting circuit, again to be processed, object is further to improve accuracy and the interference rejection ability of signal.And for changing, A/D provides suitable input voltage.
Output driving circuit: output driving circuit is mainly the break-make in turn by a plurality of MOSFAT pipes, and control step motor is advanced and suspended, to accurately detect.Mainly comprise switching value output and latch cicuit, digital output and latch cicuit, executive component driving circuit.
Telecommunication circuit: adopt infrared communication, adopt V/L electrooptical technology in electro-optical conversion circuit, before and after guaranteeing, strict insulation, has good security, simultaneously transmission of signal exactly again.It has, and antijamming capability is strong, price is low, debug the features such as easy.
Anti-interference Design: because this device works in high voltage, strong electric field environment, therefore Anti-interference Design is most important, if there is no good interference protection measure, circuit cannot be worked, even if or work reluctantly, the data of its collection also deviation are very large, therefore the design payes attention to Anti-interference Design especially, field controller shell 7 is that the iron sheet part that magnetic conduction is good is made, circuit core part and signal processing all adopt double-deck magnetic conduction iron sheet encapsulation, to shield to greatest extent the interference of strong-electromagnetic field, assurance circuit is worked reliably.
As Fig. 3 is respectively specific embodiment of the invention structural front view, vertical view and left view to Fig. 5, due to the Special use environment of the two manual zero value detection devices of insulator string of 750kV line tension and overall weight requirement, the material that each mechanical part must select that density is little, good rigidly, insulating property are good is as the section bar of this measurement mechanism.Framework 4 selects the section combination of light-high-strength to become basic framework, and testing agency 6, controller 7 and power supply 8 are fixedly mounted on framework 4, forms the essential part of the two manual zero value detection devices of insulator string of 750kV line tension of the present invention; Through comparing, select glass epoxy silk extubation tube P850 as framework (4) structural shape of this device, this material has good insulating property, higher physical strength and machining property, there are the features such as more stable size and good chemical resistance, be widely used in the aspects such as motor, the defeated modified line of transformer high-voltage road, oil, chemical industry, communication, playing insulation and support booster action, is the regeneration product of 3240 expoxy glass laminated products.
Described computing machine 10 comprises wireless communication module 9, between the wireless communication module 9 of computing machine 10 and the communication interface circuit module of controller 7, realizes radio communication, and radio communication adopts infrared transmission.
Synchronous belt 3 and synchronous pulley 2 form belt travel mechanism, framework 4 drags stepping on insulator chain by belt travel mechanism and walks, detect topworks under the control of controller 7, two detection arm of testing agency 6 stretch into respectively the connection steel cap place of adjacent two insulators 1, under spring action, be close to steel cap, pulse high-voltage in detection arm (15000V) acts on insulator 1, can produce the pulse current of microampere order, the size of this electric current depends on the resistance value of insulator 1, to this current sample, carry out A/D conversion and numerical analysis, can obtain the resistance value of insulator 1.
If Fig. 3 is to as shown in Fig. 5, the center section of described framework 4 is arranged between the string of two strings of strain insulators position on the lower side, gap, for 750kV transmission line of electricity, two strings of strain insulators string spacing is generally 500 millimeters, and the intermediate host structure of framework 4 can be arranged on this space; Synchronous belt 3 and synchronous pulley 2 form belt travel mechanism, belt travel mechanism lays respectively at two upper lateral parts of framework 4, the synchronous walking mechanism of every side comprises a synchronous belt 3 and two synchronous pulleys 2, the wheel shaft of synchronous pulley 2 is fixed on two upper lateral parts of framework 4, and the synchronous belt 3 of synchronous walking mechanism is fitted in the upper end of insulator 1; This structure of framework 4 and with being connected of two strings of strain insulators, the stepping on two strings of strain insulators of whole pick-up unit is moved more steady, testing process is safe and reliable.
Center section top at framework 4 is provided with insulating bar connecting lug 5, insulating bar and insulating bar connecting lug 5 adaptations, operating personnel pull by insulating bar or promote whole pick-up unit in the stepping of two strings of strain insulators axis direction, while arriving the best assigned position that each insulator 1 measures, suspend, detection arm is positioned at insulator steel cap middle part for optimum detection position, at this position probing arm, contact the most reliable with steel cap, two detection arm stretch into the connection steel cap place of adjacent insulator 1, resistance to insulator 1 is measured, thereby determine low value or zero resistance insulator.
Claims (3)
- The two manual zero value detection devices of insulator string of 1.750kV line tension, is characterized in that, it comprises:Framework (4): the center section of described framework (4) is arranged between two insulator string strings position on the lower side, synchronous belt (3) and synchronous pulley (2) form belt travel mechanism, belt travel mechanism lays respectively at framework (4) two upper lateral parts, and the synchronous belt of synchronous walking mechanism (3) is fitted in the top of insulator chain; On the center section top of framework (4), be provided with insulating bar connecting lug (5), by insulating bar, drag stepping on insulator chain and walk; The rigid structure that framework (4) is connected and composed by section bar; Across at least plural insulator (1);Testing agency (6): formed by gage beam, connecting rod, spring and electromagnetic switch valve, distance between two sounding rods that gage beam stretches out equals the length of an insulator (1), and gage beam passes through connecting rod, spring and electromagnetic switch valve active link on framework (4); Electromagnetic switch valve is electrically connected to executive component driving circuit; The rear end of two sounding rods of testing agency (6) the gage beam signal acquisition circuit inner with controller (7) is connected, and the steel of front end and adjacent two insulators (1) is coupling and touches the electric leakage information that gathers;Controller (7): comprise intelligent control unit CPU, DC power-supply circuit, high-voltage inverter circuit, rectification circuit, high tension protection circuit, signal sample circuit, storer, switching value output and latch cicuit, digital output and latch cicuit, executive component driving circuit, communication interface circuit; This controller (7) shell is that the iron sheet part that magnetic conduction is good is made, the interference of shielding strong-electromagnetic field; This controller (7) is fixed on framework;Power supply (8): give respectively testing agency (6) and controller (7) power supply;Computing machine (10): be placed on ground, built-in wireless communication module (9), and carry out radio communication between the communication interface modules of controller (7), controller (7) is sent to operational order, receive in real time, record measurement data, and measurement result is processed, shows and recorded to these data analysis.
- 2. two manual zero value detection devices of insulator string of 750kV line tension according to claim 1, is characterized in that: described framework (4) selects that density is little, good rigidly, section bar that insulating property are good are made.
- 3. the two manual zero value detection devices of insulator string of 750kV line tension according to claim 1, is characterized in that: the material of described framework (4) is glass epoxy silk extubation tube P850.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310512778.6A CN103529303A (en) | 2013-10-25 | 2013-10-25 | Manual zero-value detection device for double-string tension insulators of 750 kV circuit |
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| CN201310512778.6A CN103529303A (en) | 2013-10-25 | 2013-10-25 | Manual zero-value detection device for double-string tension insulators of 750 kV circuit |
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Cited By (5)
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| CN104931790A (en) * | 2015-07-07 | 2015-09-23 | 国网山西省电力公司电力科学研究院 | A remote control stepping detection apparatus for a ceramic insulator insulation resistor and a detection method thereof |
| CN107765096A (en) * | 2017-11-15 | 2018-03-06 | 国网辽宁省电力有限公司检修分公司 | A kind of insulator zero value detection unmanned plane |
| CN108107330A (en) * | 2017-12-14 | 2018-06-01 | 国网重庆市电力公司电力科学研究院 | A kind of insulator leakage current and zero-value detection device |
| CN113252984A (en) * | 2021-07-06 | 2021-08-13 | 国网湖北省电力有限公司检修公司 | Measurement data processing method and system based on Bluetooth insulator measuring instrument |
| CN116106704A (en) * | 2023-04-04 | 2023-05-12 | 国网山东省电力公司潍坊供电公司 | Intelligent live detection device for zero-value porcelain insulator of alternating-current transmission line |
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| CN104931790A (en) * | 2015-07-07 | 2015-09-23 | 国网山西省电力公司电力科学研究院 | A remote control stepping detection apparatus for a ceramic insulator insulation resistor and a detection method thereof |
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| CN113252984A (en) * | 2021-07-06 | 2021-08-13 | 国网湖北省电力有限公司检修公司 | Measurement data processing method and system based on Bluetooth insulator measuring instrument |
| CN113252984B (en) * | 2021-07-06 | 2021-11-09 | 国网湖北省电力有限公司检修公司 | Measurement data processing method and system based on Bluetooth insulator measuring instrument |
| CN116106704A (en) * | 2023-04-04 | 2023-05-12 | 国网山东省电力公司潍坊供电公司 | Intelligent live detection device for zero-value porcelain insulator of alternating-current transmission line |
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Application publication date: 20140122 |