CN104101815A - High tension transmission line comprehensive tester and testing method - Google Patents
High tension transmission line comprehensive tester and testing method Download PDFInfo
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- CN104101815A CN104101815A CN201410355291.6A CN201410355291A CN104101815A CN 104101815 A CN104101815 A CN 104101815A CN 201410355291 A CN201410355291 A CN 201410355291A CN 104101815 A CN104101815 A CN 104101815A
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Abstract
The invention relates to a high tension transmission line comprehensive tester which is structurally characterized in that a data testing calculation unit is connected with a power supply module, a pulse width modulation (PWM) control unit, a direct current constant voltage constant current source, an impedance matching unit, a standard resistor, a measured line resistor, a relay control unit, a storage and printing unit, a display unit and a keyboard. The PWM control unit, the direct current constant voltage constant current source, a power supply filtering unit, the impedance matching unit, the measured line resistor and a standard resistor are sequentially connected. The relay control unit is connected with an interference voltage detection unit and the impedance matching unit. The resistance-capacitance voltage dividing principle is utilized to measure the static induction voltage under 20kV, a disperse Fourier development technology is adopted to test line loop resistance, digital filtering is utilized to remove alternating current components, only direct current components are measured, and direct current voltage of the line can be still measured accurately after alternating current is overlapped. The tester provides accurate data for fixed value setting of a line automatic device and ensures that a power system runs safely and reliably.
Description
Technical field
The present invention relates to a kind of power system device field adjustable, relate in particular to a kind of ultra-high-tension power transmission line comprehensive tester and method of testing, be mainly used in the test of ultra-high-tension power transmission line induced voltage, induction current and loop resistance, belong to electric power application.
Background technology
Each department are newly-built in recent years, transformation circuit is more, due to circuit top with end transformer station adjacent spaces is charged and 66kV Above Transmission Lines is joint used and the impact of scissors crossing, cause transmission line of electricity to produce each other very high induced voltage, induction current, current testing tool often, owing to being subject to induced voltage, faradic impact to damage instrument and the serious deviation of test data, cannot provide authentic and valid test result.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art; a kind of ultra-high-tension power transmission line comprehensive tester is provided; solved newly-built, transformation circuit be subject to the impact of induced voltage, electric current cannot safety and precise the problem of test; for line-automation device fixed value adjusting provides accurate data, protection ensures power system security reliability service.
Another object of the present invention is to provide a kind of method of testing of ultra-high-tension power transmission line comprehensive tester.
Technical scheme of the present invention is as follows:
Data test computing unit is set in instrument, and data test computing unit connects supply module, PWM control module, DC constant voltage constant current source, impedance matching unit, measuring resistance, test line resistance, relay control unit, storage and print unit, display unit and keyboard; PWM control module, DC constant voltage constant current source, power filter unit, impedance matching unit, test line resistance and measuring resistance connect successively; Relay control unit connects interference voltage detecting unit and impedance matching unit; Interference voltage detecting unit and measuring resistance ground connection; The two ends of test line resistance connect Overvoltage protecting unit.
Described data test computing unit adopts 32 high speed processors.
Described Overvoltage protecting unit is low voltage surge arrester.
In described instrument, be provided with interchange noise killer.
Described supply module working power adopts analog-and digital-two groups of Switching Power Supplies of separating.
The housing of described instrument adopts hard plastic seal box.
Method of testing of the present invention comprises the steps:
Utilize capacitance-resistance voltage division principle measurement of electrostatic induced voltage 0.6-20kV, measuring accuracy 5%, measuring circuit access high precision current transformer measuring circuit capacitance current (0-1000mA), measuring accuracy 0.5%; Measure electromagnetic induction voltage 0-600V, measuring circuit access high precision current transformer measuring circuit em induced current (0-50A), measuring accuracy 0.5%; Utilize 20kV high pressure vacuum relay high-voltage contact to be connected on dividing potential drop electric capacity two ends, contact off-state measurement of electrostatic induced voltage, while measuring when electromagnetic induction voltage according to the voltage detecting when voltage measurement module lower than 1V, control relay closes, by dividing potential drop electric capacity short circuit, use voltage measurement module to measure electromagnetic induction voltage.
Method of testing of the present invention comprises the steps:
Adopt and disperse Fourier expansion technology to realize the parameter measurement of high-tension line direct current resistance, remove alternating component by digital filtering, only measure DC component, after having alternating voltage to superpose, still can accurately measure the DC voltage on circuit; According to the interchange interference voltage amplitude size detecting, select the matching value of different resistances to adopt series system access test loop, for effectively reducing interference voltage, direct current signal is affected; Measurement circuit resistance range: 2m Ω-80 Ω; Resolution 1 μ Ω; Test accuracy: ± 0.5% ± 5 words.
Advantageous effect of the present invention is as follows:
1, according to the interchange interference voltage amplitude size detecting, select the matching value of different resistances to adopt series system access test loop, for effectively reducing interference voltage, direct current signal is affected.
2, the working power of tester adopts analog-and digital-two groups of Switching Power Supplies of separating, can avoid like this interfering with each other, the safety that can ensure again the staff of operating instrument, need not touch strong power part when personnel test, and is analog-and digital-ly kept apart completely by high speed photo coupling.
3, the built-in interchange noise killer of instrument, has high antijamming capability, can resist more than power transmission line power frequency interference current reaches 30A, more than inter-phase electromagnetic induced voltage reaches 100V.
4, test has manual, automatic two kinds of patterns and can select, after having tested, line resistance can be calculated to every phase resistance automatically, and average resistance is converted under rated temperature (20 DEG C), be convenient to compare to check circuit symmetry with standard value, search accurate data is provided for circuit distance fault, for the accuracy of checking circuit power frequency parameter provides evidence.
5, built-in 32 high speed processors of instrument host, have powerful data-handling capacity, full simplified Chinese character liquid crystal display, and built-in high speed thermal printing function prints all measurement data immediately.
6, instrument internal is installed lightning protection and holding circuit, possesses the perfect measure such as anti-lightning strike, anti-interference.
7, Instrument shell adopts high strength, high insulation, wear-resisting hard plastic seal box, has good looking appearance, and sturdy and durable, shockproof properties is good, and the class of insulation is high, facilitates the features such as onsite moving.
Brief description of the drawings
Fig. 1 is structural representation block diagram of the present invention.
Fig. 2 is induced voltage measuring principle figure of the present invention.
Fig. 3 is loop resistance measurement schematic diagram of the present invention.
Fig. 4 is loop resistance measurement wiring schematic diagram of the present invention.
Embodiment
Referring to accompanying drawing, in conjunction with specific embodiments, describe the present invention in detail
.
Embodiment
As shown in Figure 1, data test computing unit is set in instrument, and data test computing unit connects supply module, PWM control module, DC constant voltage constant current source, impedance matching unit, measuring resistance, test line resistance, relay control unit, storage and print unit, display unit and keyboard; PWM control module, DC constant voltage constant current source, power filter unit, impedance matching unit, test line resistance and measuring resistance connect successively; Relay control unit connects interference voltage detecting unit and impedance matching unit; Interference voltage detecting unit and measuring resistance ground connection; The two ends of test line resistance connect Overvoltage protecting unit.
Described data test computing unit adopts 32 high speed processors; Described Overvoltage protecting unit is low voltage surge arrester; In described instrument, be provided with interchange noise killer; Described supply module working power adopts analog-and digital-two groups of Switching Power Supplies of separating; The housing of described instrument adopts hard plastic seal box.
As shown in Figure 2, method of testing of the present invention comprises the steps:
Utilize capacitance-resistance voltage division principle measurement of electrostatic induced voltage 0.6-20kV, measuring accuracy 5%, measuring circuit access high precision current transformer measuring circuit capacitance current (0-1000mA), measuring accuracy 0.5%; Measure electromagnetic induction voltage 0-600V, measuring circuit access high precision current transformer measuring circuit em induced current (0-50A), measuring accuracy 0.5%; Utilize 20kV high pressure vacuum relay high-voltage contact to be connected on dividing potential drop electric capacity two ends, contact off-state measurement of electrostatic induced voltage, while measuring when electromagnetic induction voltage according to the voltage detecting when voltage measurement module lower than 1V, control relay closes, by dividing potential drop electric capacity short circuit, use voltage measurement module to measure electromagnetic induction voltage.
As shown in Figure 3-4, method of testing of the present invention comprises the steps:
Adopt and disperse Fourier expansion technology to realize the parameter measurement of high-tension line direct current resistance, remove alternating component by digital filtering, only measure DC component, after having alternating voltage to superpose, still can accurately measure the DC voltage on circuit; According to the interchange interference voltage amplitude size detecting, select the matching value of different resistances to adopt series system access test loop, for effectively reducing interference voltage, direct current signal is affected; Measurement circuit resistance range: 2m Ω-80 Ω; Resolution 1 μ Ω; Test accuracy: ± 0.5% ± 5 words.
Claims (8)
1. ultra-high-tension power transmission line comprehensive tester, it is characterized in that, in instrument, data test computing unit is set, data test computing unit connects supply module, PWM control module, DC constant voltage constant current source, impedance matching unit, measuring resistance, test line resistance, relay control unit, storage and print unit, display unit and keyboard; PWM control module, DC constant voltage constant current source, power filter unit, impedance matching unit, test line resistance and measuring resistance connect successively; Relay control unit connects interference voltage detecting unit and impedance matching unit; Interference voltage detecting unit and measuring resistance ground connection; The two ends of test line resistance connect Overvoltage protecting unit.
2. ultra-high-tension power transmission line comprehensive tester according to claim 1, is characterized in that described data test computing unit adopts 32 high speed processors.
3. ultra-high-tension power transmission line comprehensive tester according to claim 1, is characterized in that described Overvoltage protecting unit is low voltage surge arrester.
4. ultra-high-tension power transmission line comprehensive tester according to claim 1, is characterized in that being provided with interchange noise killer in described instrument.
5. ultra-high-tension power transmission line comprehensive tester according to claim 1, is characterized in that described supply module working power adopts analog-and digital-two groups of Switching Power Supplies of separating.
6. ultra-high-tension power transmission line comprehensive tester according to claim 1, is characterized in that the housing of described instrument adopts hard plastic seal box.
7. the method for testing of ultra-high-tension power transmission line comprehensive tester according to claim 1, it is characterized in that comprising the steps: to utilize capacitance-resistance voltage division principle measurement of electrostatic induced voltage 0.6-20kV, measuring accuracy 5%, measuring circuit access high precision current transformer measuring circuit capacitance current (0-1000mA), measuring accuracy 0.5%; Measure electromagnetic induction voltage 0-600V, measuring circuit access high precision current transformer measuring circuit em induced current (0-50A), measuring accuracy 0.5%; Utilize 20kV high pressure vacuum relay high-voltage contact to be connected on dividing potential drop electric capacity two ends, contact off-state measurement of electrostatic induced voltage, while measuring when electromagnetic induction voltage according to the voltage detecting when voltage measurement module lower than 1V, control relay closes, by dividing potential drop electric capacity short circuit, use voltage measurement module to measure electromagnetic induction voltage.
8. the method for testing of ultra-high-tension power transmission line comprehensive tester according to claim 1, it is characterized in that comprising the steps: adopting and disperse Fourier expansion technology to realize the parameter measurement of high-tension line direct current resistance, remove alternating component by digital filtering, only measure DC component, after having alternating voltage to superpose, still can accurately measure the DC voltage on circuit; According to the interchange interference voltage amplitude size detecting, select the matching value of different resistances to adopt series system access test loop, for effectively reducing interference voltage, direct current signal is affected; Measurement circuit resistance range: 2m Ω-80 Ω; Resolution 1 μ Ω; Test accuracy: ± 0.5% ± 5 words.
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| CN201410355291.6A CN104101815B (en) | 2014-07-24 | 2014-07-24 | High tension transmission line comprehensive tester and testing method |
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| CN104101815B CN104101815B (en) | 2017-02-15 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777366A (en) * | 2015-04-14 | 2015-07-15 | 国网辽宁省电力有限公司抚顺供电公司 | High-voltage insulation resistance testing device for anti-interference power transmission line |
| CN104914579A (en) * | 2015-04-23 | 2015-09-16 | 北京小鸟看看科技有限公司 | Head-mounted display and dustproof method applied to head-mounted display |
| CN105929284A (en) * | 2016-06-24 | 2016-09-07 | 国网辽宁省电力有限公司抚顺供电公司 | Wireless tester and testing method for live-line measuring zinc oxide arrester |
| CN106383259A (en) * | 2016-09-06 | 2017-02-08 | 广东电网有限责任公司江门供电局 | Induced current and inducted voltage measurement method of multi-circuit transmission lines on same tower |
| CN107884624A (en) * | 2017-12-28 | 2018-04-06 | 国家电网公司 | Transmission line of electricity anti-interference direct current resistance test device |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
| CN110221180A (en) * | 2019-07-01 | 2019-09-10 | 国网四川省电力公司电力科学研究院 | A kind of identification of 10kV distribution line lightning fault and localization method |
| CN112332289A (en) * | 2020-11-13 | 2021-02-05 | 广东电网有限责任公司 | Cable maintenance device |
| CN112578185A (en) * | 2020-11-13 | 2021-03-30 | 国网江苏省电力有限公司电力科学研究院 | Device and method for testing direct current resistance of conductor bearing electromagnetic coupling induced potential |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777366A (en) * | 2015-04-14 | 2015-07-15 | 国网辽宁省电力有限公司抚顺供电公司 | High-voltage insulation resistance testing device for anti-interference power transmission line |
| CN104914579A (en) * | 2015-04-23 | 2015-09-16 | 北京小鸟看看科技有限公司 | Head-mounted display and dustproof method applied to head-mounted display |
| CN105929284A (en) * | 2016-06-24 | 2016-09-07 | 国网辽宁省电力有限公司抚顺供电公司 | Wireless tester and testing method for live-line measuring zinc oxide arrester |
| CN106383259A (en) * | 2016-09-06 | 2017-02-08 | 广东电网有限责任公司江门供电局 | Induced current and inducted voltage measurement method of multi-circuit transmission lines on same tower |
| CN107884624A (en) * | 2017-12-28 | 2018-04-06 | 国家电网公司 | Transmission line of electricity anti-interference direct current resistance test device |
| CN109813990A (en) * | 2019-03-21 | 2019-05-28 | 山西晋电电力科技有限公司电网技术分公司 | Transmission line parameter tests security protection platform |
| CN110221180A (en) * | 2019-07-01 | 2019-09-10 | 国网四川省电力公司电力科学研究院 | A kind of identification of 10kV distribution line lightning fault and localization method |
| CN110221180B (en) * | 2019-07-01 | 2021-07-06 | 国网四川省电力公司电力科学研究院 | 10kV distribution line lightning stroke fault recognition and positioning method |
| CN112332289A (en) * | 2020-11-13 | 2021-02-05 | 广东电网有限责任公司 | Cable maintenance device |
| CN112578185A (en) * | 2020-11-13 | 2021-03-30 | 国网江苏省电力有限公司电力科学研究院 | Device and method for testing direct current resistance of conductor bearing electromagnetic coupling induced potential |
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