CN105445583A - Transformer station lightning arrester test method - Google Patents
Transformer station lightning arrester test method Download PDFInfo
- Publication number
- CN105445583A CN105445583A CN201510846982.0A CN201510846982A CN105445583A CN 105445583 A CN105445583 A CN 105445583A CN 201510846982 A CN201510846982 A CN 201510846982A CN 105445583 A CN105445583 A CN 105445583A
- Authority
- CN
- China
- Prior art keywords
- lightning arrester
- voltage
- conduction current
- arrester
- temperature
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Thermistors And Varistors (AREA)
Abstract
The invention relates to the lightning arrester test technology and particularly relates to a transformer station lightning arrester test method. The transformer station lightning arrester test method comprises steps of cleaning the surface of the lightning arrester and detecting whether damages exist and whether two end heads are loosen or corroded, detecting the lightning arrester conditions of internal damping and porcelain sleeve cracking, detecting whether the contact of the parallel connection resistor is sound or whether the parallel connection resistor is aged and spoiled or broken, detecting insulation resistance, detecting conduction current, converting the temperature of the conduction current, and measuring the power frequency discharge. The transformer station lightning arrester test method is applicable to the FZ series valve type lightning arrester and eliminates the safety hidden danger of the lightning arrester.
Description
Technical field
The present invention relates to test of lightning arrester technology, be specifically related to a kind of transformer substation arrester test method.
Background technology
Lightning arrester has tube type arrester, valve-type arrester and Zinc-Oxide Arrester.Lightning arrester is connected between wire and ground usually, in parallel with protected equipment.When protected equipment runs under normal working voltage, Analyse of Reject-acting Arrester, is namely considered as open circuit over the ground.Once there is superpotential, and jeopardize protected apparatus insulated time, lightning arrester is action immediately, by high-voltage impact conduct current the earth, thus deboost amplitude, protection insulation of electrical installation.After having served as loss of voltage, lightning arrester restores to the original state rapidly, enables system normal power supply.
Most test of lightning arrester all carries out before annual thunderstorm season and after overhaul or if desired, about the unprecedented specification description always of the test method of lightning arrester in prior art, there is different test methods in different transformer stations, and the regulation that current most transformer station is not concrete, for test specification and constraining force poor, and the test findings of lightning arrester directly has influence on the quality of lightning arrester, the inaccurate Electrical Safety that even can have influence on whole transformer station of result.
Summary of the invention
The invention provides a kind of transformer substation arrester test method, solve the nonstandard problem of test of lightning arrester in prior art, concrete technical scheme is as follows:
A kind of transformer substation arrester test method, comprises the steps:
S1 is clean by lightning arrester surface cleaning, and check with or without wound, two ends has non-loosening and corrosion;
Whether S2 checks lightning arrester internal wetted, insulator cracks, and checks that whether the contact of parallel resistance is good, aged deterioration and fracture;
S3 megger test: measure with 5000V insulation resistance meter when measuring insulation, for the lightning arrester of multicomponent composition, tackles its insulating resistance value over the ground of each element independent measurement;
S4 measures conduction current: adopt half-wave rectification method, ac high-voltage is obtained by the boosting of pressure regulator adjustable transformer, become high direct voltage by rectifier cell again and be added in lightning arrester side to be measured, utilize milliammeter near the high-pressure side of lightning arrester to measure conduction current, in high-voltage rectifying loop, add the filter capacitor of electric capacity at more than 0.1nF, adopt the DC experiment voltage in electrostatic voltmeter measurement commutating circuit;
The temperature conversion of S5 conduction current: conduction current is relevant with temperature, should record room temperature during test.The numerical value that the standard of conduction current is temperature when being 20 DEG C, when temperature and standard temperature differ by more than 5 DEG C when tested, numerical value when should be scaled to 20 DEG C, its temperature conversion formula is
I
20＝IT[I+K(20-T)/10]＝ITK
t
, I in formula
20conduction current during for being converted to 20 DEG C; Actual measurement room temperature when T is measurement; K is the percentage of temperature conduction current change when often changing 10 DEG C, generally gets K=0.05; K
tfor the temperature conversion factor of conduction current;
S6: power-frequency sparkover voltage is measured: adjustment single-phase self-coupling pressure regulator AV even boosted voltage; it is 4 ~ 5s that the rate of rise controls when boosting to lightning arrester discharge contactor and thread off from just; the waveform of trial voltage adopts sinusoidal wave; each lightning arrester repeats 3 power-frequency discharge tests; each intertrial interval must not be less than one minute; power-frequency sparkover voltage gets the mean value of three tests; 0.5s internal cutting off power supply after gap discharge; install instantaneous over-current protective device in the loop, and made to be limited within 0.2 ~ 0.7A scope by the power current of lightning arrester.
Preferably, shielded conductor is adopted to be connected in described step S4 between microampere meter with lightning arrester.
Preferably, in described step S4, electric capacity can replace with phase-shift capacitor at the filter capacitor of more than 0.1nF.
Preferably, in described S6, the method for single-phase self-coupling pressure regulator boosting has two kinds: one to be manual operation, is furnished with time-controlling arrangement, namely on single-phase self-coupling pressure regulator handle, an insulation rod is fixed, when voltage rises to close to extinguishing voltage, rotate rapidly, until lightning arrester discharge tripping operation; Two is electric operatings, is namely boosted by actuator operation pressure regulator with a motor, after lightning arrester discharge, and overcurrent trip.
Beneficial effect:
The invention provides a kind of transformer substation arrester test method, be applicable to FZ series valve-type arrester, step gets rid of the potential safety hazard of lightning arrester by experiment, improves the check accuracy test of lightning arrester.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is for surveying conduction current wiring schematic diagram;
Fig. 2 is for surveying power-frequency sparkover voltage wiring schematic diagram.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, be clearly and completely described below to the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
As shown in Figure 1 and Figure 2, a kind of transformer substation arrester test method, comprises the steps:
S1 is clean by lightning arrester surface cleaning, and check with or without wound, two ends has non-loosening and corrosion;
Whether S2 mainly checks the sealing situation of lightning arrester, checks lightning arrester internal wetted, insulator cracks, and checks that whether the contact of parallel resistance is good, aged deterioration and fracture;
S3 megger test: when after lightning arrester internal wetted, insulation resistance obviously declines, standard >=2000M Ω, insulation resistance is refined does not have clear stipulaties, can only compare with last sub-value, measure with 5000V insulation resistance meter when measuring insulation, for the lightning arrester of multicomponent composition, tackle its insulating resistance value over the ground of each element independent measurement;
S4 measures conduction current: main inspection parallel resistance is aging, if loose contact, conduction current obviously declines, if fracture, conduction current drops to zero, if make moist, conduction current sharply increases and reaches 1000 more than μ A, adopt half-wave rectification method, ac high-voltage is obtained by the boosting of pressure regulator adjustable transformer, become high direct voltage by rectifier cell again and be added in lightning arrester side to be measured, utilize milliammeter near the high-pressure side of lightning arrester to measure conduction current, the filter capacitor of electric capacity at more than 0.1nF is added in high-voltage rectifying loop, adopt the DC experiment voltage in electrostatic voltmeter measurement commutating circuit, as shown in Figure 2, PA1, PA2, PA3: reometer, AV: pressure regulator, T: testing transformer, V: high voltage silicon rectifier stack, R1: protective resistance, PV1: low-pressure side voltage table, PV2: the electrostatic voltmeter directly measuring trial voltage, C: filter capacitor, F: lightning arrester, non-linear due to parallel resistance, the pulsation of the high-voltage rectifying voltage applied is comparatively large on measurement result impact, and General Requirements mains ripple is no more than ± and 1.5%, therefore, in high-voltage rectifying loop, the filter capacitor of electric capacity at more than 0.1nF should be added.If do not have suitable capacitor, available phase-shift capacitor replaces, and now capacitor can by 3 of its ac rated voltage times in high direct voltage loop.Directly trial voltage should be measured, with the reliability of warranty test result in high-pressure side.DC experiment voltage directly measured by normal employing electrostatic voltmeter, also can measure with high resistant device string reometer (or connecing voltage table with resitstance voltage divider), should note the verification to measuring system, make measuring error be not more than 2%.The measurement of conduction current, should avoid the corona current of the equipment such as wire and the impact of other stray currents as far as possible.If arrester ground end can disconnect, then reometer is at the earth terminal of lightning arrester, namely in Fig. 12 position; If arrester ground end can not disconnect, then reometer connects the position of in FIG 1, and need add shielding from reometer to the lead-in wire of lightning arrester, and should take care during reading, reometer accuracy should be greater than 1.5 grades.
The temperature conversion of S5 conduction current: conduction current is relevant with temperature, should record room temperature during test.The numerical value that the standard of conduction current is temperature when being 20 DEG C, when temperature and standard temperature differ by more than 5 DEG C when tested, numerical value when should be scaled to 20 DEG C, its temperature conversion formula is
I
20＝IT[I+K(20-T)/10]＝ITK
t
, I in formula
20conduction current during for being converted to 20 DEG C; Actual measurement room temperature when T is measurement; K is the percentage of temperature conduction current change when often changing 10 DEG C, generally gets K=0.05; K
tfor the temperature conversion factor of conduction current, under the trial voltage of regulation, there is the conduction current numerical value of the valve-type arrester of parallel resistance should within the specific limits, if conduction current obviously increases, illustrate that inside makes moist phenomenon; If conduction current obviously declines, be then that parallel resistance fracture occurs or snaps;
S6: power-frequency sparkover voltage is measured: adjustment single-phase self-coupling pressure regulator AV even boosted voltage, it is 4 ~ 5s that the rate of rise controls when boosting to lightning arrester discharge contactor and thread off from just, the waveform of trial voltage adopts sinusoidal wave, each lightning arrester repeats 3 power-frequency discharge tests, each intertrial interval must not be less than one minute, power-frequency sparkover voltage gets the mean value of three tests, 0.5s internal cutting off power supply after gap discharge, install instantaneous over-current protective device in the loop, and make to be limited within 0.2 ~ 0.7A scope by the power current of lightning arrester, by measuring the power-frequency sparkover voltage of valve-type arrester, can reflect its sparking distance structure and characteristic whether normal, check its protective value whether normal.Power-frequency sparkover voltage can not be too high, otherwise mean the surge voltage of lightning arrester too high (because the coefficient of impact of lightning arrester is certain).Like this, when atmospheric over-voltage attacks, lightning arrester can not action message, affects the protective value of lightning arrester.So all define the higher limit of power-frequency sparkover voltage in testing regulations, require that power-frequency sparkover voltage value can not exceed higher limit.Meanwhile, power-frequency sparkover voltage can not be too low, otherwise extinguishing voltage also decreases, so that can not cut off power frequency continued flow in some cases, even causes Explosion of on Arrester.In addition, malfunction (through-current capability of common valve-type arrester is little, does not generally allow action under internal overvoltage) may also be there is under internal overvoltage.So define the lower limit of power-frequency sparkover voltage in testing regulations, require that power-frequency sparkover voltage value must not lower than lower limit.
Adopt shielded conductor to be connected in described step S4 between microampere meter with lightning arrester, between microampere meter and lightning arrester, adopt shielded conductor, make measurement result be subject to the impact of stray current very little, improve accuracy; In described step S4, electric capacity can replace with phase-shift capacitor at the filter capacitor of more than 0.1nF, in described S6, the method for single-phase self-coupling pressure regulator boosting has two kinds: one to be manual operation, is furnished with time-controlling arrangement, namely on single-phase self-coupling pressure regulator handle, an insulation rod is fixed, when voltage rises to close to extinguishing voltage, rapid rotation, until lightning arrester discharge tripping operation; Two is electric operatings, is namely boosted by actuator operation pressure regulator with a motor, after lightning arrester discharge, and overcurrent trip.
The invention provides a kind of transformer substation arrester test method, be applicable to FZ series valve-type arrester, step gets rid of the potential safety hazard of lightning arrester by experiment, improves the check accuracy test of lightning arrester.
Above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a transformer substation arrester test method, is characterized in that, comprises the steps:
S1 is clean by lightning arrester surface cleaning, and check with or without wound, two ends has non-loosening and corrosion;
Whether S2 checks lightning arrester internal wetted, insulator cracks, and checks that whether the contact of parallel resistance is good, aged deterioration and fracture;
S3 megger test: measure with 5000V insulation resistance meter when measuring insulation, for the lightning arrester of multicomponent composition, tackles its insulating resistance value over the ground of each element independent measurement;
S4 measures conduction current: adopt half-wave rectification method, ac high-voltage is obtained by the boosting of pressure regulator adjustable transformer, become high direct voltage by rectifier cell again and be added in lightning arrester side to be measured, utilize milliammeter near the high-pressure side of lightning arrester to measure conduction current, in high-voltage rectifying loop, add the filter capacitor of electric capacity at more than 0.1nF, adopt the DC experiment voltage in electrostatic voltmeter measurement commutating circuit;
The temperature conversion of S5 conduction current: conduction current is relevant with temperature, should record room temperature during test.The numerical value that the standard of conduction current is temperature when being 20 DEG C, when temperature and standard temperature differ by more than 5 DEG C when tested, numerical value when should be scaled to 20 DEG C, its temperature conversion formula is
I
20＝IT[I+K(20-T)/10]＝ITK
t，
I in formula
20conduction current during for being converted to 20 DEG C; Actual measurement room temperature when T is measurement; K is the percentage of temperature conduction current change when often changing 10 DEG C, generally gets K=0.05; K
tfor the temperature conversion factor of conduction current;
S6: power-frequency sparkover voltage is measured: adjustment single-phase self-coupling pressure regulator AV even boosted voltage; it is 4 ~ 5s that the rate of rise controls when boosting to lightning arrester discharge contactor and thread off from just; the waveform of trial voltage adopts sinusoidal wave; each lightning arrester repeats 3 power-frequency discharge tests; each intertrial interval must not be less than one minute; power-frequency sparkover voltage gets the mean value of three tests; 0.5s internal cutting off power supply after gap discharge; install instantaneous over-current protective device in the loop, and made to be limited within 0.2 ~ 0.7A scope by the power current of lightning arrester.
2. transformer substation arrester test method as claimed in claim 1, is characterized in that, adopt shielded conductor to be connected in described step S4 between microampere meter with lightning arrester.
3. transformer substation arrester test method as claimed in claim 1, it is characterized in that, in described step S4, electric capacity can replace with phase-shift capacitor at the filter capacitor of more than 0.1nF.
4. transformer substation arrester test method as claimed in claim 1, it is characterized in that, in described S6, the method for single-phase self-coupling pressure regulator boosting has two kinds: one to be manual operation, is furnished with time-controlling arrangement, namely on single-phase self-coupling pressure regulator handle, an insulation rod is fixed, when voltage rises to close to extinguishing voltage, rotate rapidly, until lightning arrester discharge tripping operation; Two is electric operatings, is namely boosted by actuator operation pressure regulator with a motor, after lightning arrester discharge, and overcurrent trip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846982.0A CN105445583A (en) | 2015-11-27 | 2015-11-27 | Transformer station lightning arrester test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510846982.0A CN105445583A (en) | 2015-11-27 | 2015-11-27 | Transformer station lightning arrester test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105445583A true CN105445583A (en) | 2016-03-30 |
Family
ID=55556012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510846982.0A Pending CN105445583A (en) | 2015-11-27 | 2015-11-27 | Transformer station lightning arrester test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105445583A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526356A (en) * | 2016-10-14 | 2017-03-22 | 国网上海市电力公司 | Metal oxide lightning arrester live-line detection validity test system |
| CN108663591A (en) * | 2018-05-18 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of device and method for verifying the control logic and control sequential of controllable arrester |
| CN109239505A (en) * | 2016-08-18 | 2019-01-18 | 赵万云 | A kind of test of lightning arrester device |
| CN111077400A (en) * | 2020-01-08 | 2020-04-28 | 国网福建省电力有限公司 | 10KV zinc oxide arrester fault monitoring device and control method thereof |
| CN114062810A (en) * | 2021-11-11 | 2022-02-18 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line arrester |
-
2015
- 2015-11-27 CN CN201510846982.0A patent/CN105445583A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 中华人名共和国电子工业部: "《中华人名共和国电子行业标准SJ/T31399-94》", 1 June 1994 * |
| 中华人民共和国国家发展和改革委员会: "《中华人民共和国电力行业标准DL/T474.5-2006》", 6 May 2006 * |
| 艾特贸易网: "阀型避雷器试验及其结果分析判断", 《HTTP：//WWW.AITMY.COM/NEWS/201412/11/NEWS_74738.HTML》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239505A (en) * | 2016-08-18 | 2019-01-18 | 赵万云 | A kind of test of lightning arrester device |
| CN106526356A (en) * | 2016-10-14 | 2017-03-22 | 国网上海市电力公司 | Metal oxide lightning arrester live-line detection validity test system |
| CN108663591A (en) * | 2018-05-18 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of device and method for verifying the control logic and control sequential of controllable arrester |
| CN111077400A (en) * | 2020-01-08 | 2020-04-28 | 国网福建省电力有限公司 | 10KV zinc oxide arrester fault monitoring device and control method thereof |
| CN114062810A (en) * | 2021-11-11 | 2022-02-18 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line arrester |
| CN114062810B (en) * | 2021-11-11 | 2023-07-25 | 国网湖南省电力有限公司 | Fracture prediction method for zinc oxide line lightning arrester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Metwally et al. | Online condition monitoring of surge arresters based on third-harmonic analysis of leakage current | |
| CN105445583A (en) | Transformer station lightning arrester test method | |
| Christodoulou et al. | Measurement of the resistive leakage current in surge arresters under artificial rain test and impulse voltage subjection | |
| CN106526383B (en) | Lightning arrester state monitoring system and monitoring method | |
| CN108919026B (en) | Live detection method for leakage current of lightning arrester | |
| JP2019032315A (en) | Grounding factor determination method | |
| CN105548821A (en) | Lightning arrester live detection method | |
| CN110957875B (en) | Process method for preventing bar from mistakenly breaking down during alternating current voltage withstanding of stator winding of large motor | |
| CN207882327U (en) | A kind of network voltage full frequency-domain monitoring device based on wideband wide range CT | |
| Cristaldi et al. | Monitoring of power transformer bushings in high voltage substations | |
| Banjanin et al. | Experimental registration and numerical simulation of the transient overvoltages caused by single phase intermittent arc earth fault in 35 kV network with isolated neutral | |
| CN104833841B (en) | A kind of transformer station invades Zenith tracking method | |
| Jacob et al. | Online partial discharge measurement of a high-voltage direct current converter wall-bushing | |
| CN112305348A (en) | Method for quickly testing resistive current of reconstructed MOA (metal oxide arrester) by considering in-phase capacitive equipment | |
| CN115201630A (en) | Insulator fault detection method, system and equipment | |
| Achouri et al. | Protection of 25Kv electrified railway system | |
| CN102565510A (en) | Method for lively testing resistive current of lightning arrester of power transmission line | |
| CN104901168A (en) | Lightning arrester with counting function | |
| CN203799779U (en) | Neutral point and shell double-grounding system for transformer | |
| CN206818820U (en) | Test circuit of metal oxide arrester | |
| CN103839657B (en) | A kind of neutral point for transformer and the two grounding system of shell | |
| Li et al. | Development and Application of Leakage Current Monitoring Device of MOV in UHV/EHV Series Capacitors | |
| Horchue et al. | Impulse Impedance Measurements of Lightning Protection Earthings | |
| Jaya et al. | Adapting frequency domain spectroscopy as an online monitoring tool for the insulation of power transformers | |
| McDermid | Reliability of station class surge arresters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160330 |