CN105353278A - Crown block high-voltage power supply system electrical equipment whole alternating-current withstand voltage testing method - Google Patents
Crown block high-voltage power supply system electrical equipment whole alternating-current withstand voltage testing method Download PDFInfo
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- CN105353278A CN105353278A CN201510700403.1A CN201510700403A CN105353278A CN 105353278 A CN105353278 A CN 105353278A CN 201510700403 A CN201510700403 A CN 201510700403A CN 105353278 A CN105353278 A CN 105353278A
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- voltage
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- supply system
- traveling crane
- overhead traveling
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- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
The invention discloses a crown block high-voltage power supply system electrical equipment whole alternating-current withstand voltage testing method. The method comprises the steps of: preparing before testing; determining specifications, models and lengths of a crown block power supply system incoming power supply cable and a connection cable; preparing high-voltage switches such as a load switch, a current transformer, a voltage transformer and a post insulator; and preparing a high-voltage sliding contact line and the post insulator. The crown block high-voltage power supply system electrical equipment whole alternating-current withstand voltage testing method has the advantages that the problem that the safety distance of a testing space is insufficient is solved, and the safety of construction personnel is ensured; in addition, a flexible series-parallel combination mode is adopted for reactors used for the testing, and the requirement of a testing frequency is met.
Description
Technical field
The present invention relates to a kind of high voltage electric equipment alternating current withstand voltage test method, in particular, relate to a kind of overhead traveling crane high voltage supply system electrical equipment whole group of alternating current withstand voltage test method.
Background technology
At present, the electrical equipment of metallurgy industry overhead traveling crane high voltage supply system is generally all installed on overhead crane orbit beam, high-tension switch cabinet is arranged in the walkway of track girder, the unsettled side being arranged on track girder of high pressure trolley, connected by high-tension cable between high-tension switch cabinet and high pressure trolley, the high voltage supply system of composition overhead traveling crane.
Whole electric power system, is arranged on the high-altitude of distance ground 30--40 rice.Track girder walkway width only has about 1 meter, and trolley is arranged on the side of track girder, and whole electric equipment test environment space is narrow and small, is in high-altitude again.Be unfavorable for having bad luck of testing equipment, and the safe distance of high-potting is inadequate, the easy crisis person and device security.And due to the isolation material of each electrical equipment different, insulation characterisitic is also not quite similar, and as high-tension cable electric capacity is comparatively large, in capacitive characteristics, generally adopts DC break down voltage; Trolley and high-tension switch cabinet electric capacity very little, in resistive characteristic, the general AC power frequency that adopts is withstand voltage, needs the different testing equipment of two covers to test respectively on track girder walkway.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, and provide a kind of high-tension cable that utilizes to carry out for medium changes the withstand voltage test originally carried out in high-altitude into ground, improve operating efficiency, reduce a kind of overhead traveling crane high voltage supply system electrical equipment whole group of alternating current withstand voltage test method of construction cost.
A kind of overhead traveling crane high voltage supply system electrical equipment of the present invention whole group of alternating current withstand voltage test method, comprises following construction procedure:
Prepare before step one, test; Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length;
Prepare high-voltage switch gear mainly to comprise: on-load switch, current transformer, voltage transformer (VT) and support insulator; Prepare high pressure trolley and support insulator;
The configuration of step 2, testing equipment and the selection of the mode of connection; The testing equipment suitable according to the electric capacity size configure of test specimen and the mode of connection; Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable electric capacity is comparatively large, in capacitive characteristics; Trolley and high-tension switch cabinet electric capacity very little, in resistive characteristic; When carrying out whole group of ac voltage withstanding, by size configure AC frequency conversion series resonant testing equipment and the mode of connection of electric cable capacitance amount;
Step 3, when not considering the electric capacity of high-voltage switch gear and high pressure trolley, calculate overhead traveling crane high voltage supply system total capacitance, computing method are: C=0.284uF × (0.2+0.1)=0.0852uF; Need before the test to pass through computing formula
reasonable disposition reactor;
Step 4, inlet wire cable AC voltage withstand test; AC frequency conversion series resonant testing equipment is placed on higher level electric substation, carries out inlet wire cable AC voltage withstand test; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, and testing equipment will be automatically found tuning-points, start test;
Step 5, high voltage supply system whole group of AC voltage withstand test; Testing equipment placement location is constant, close high-voltage switch gear, whole electric power system is communicated with, carry out overhead traveling crane high voltage supply system electrical equipment whole group of AC voltage withstand test, the selection of the mode of connection is by calculating gained, routine tests at need, can connect together and test, and testing standard should adopt the minimum standard in the various equipment of connection; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, presses test button, testing equipment will be automatically found tuning-points, start test; In process of the test, when tested thing breaks down, different high-voltage switch gear routine tests can be disconnected respectively, reduce malfunction elimination scope, until find trouble spot;
Further: described overhead traveling crane electric power system incoming power cable selects that model is YJV-8.7/10KV, sectional area is 3 × 150mm2, length 200m.
Further: model, the sectional area of described link cable are identical with overhead traveling crane electric power system incoming power cable, joint length 20m.
Further: the resistive loads such as described high-voltage switch gear require that frequency is at 30-100HZ.
The invention has the beneficial effects as follows: (1) ingenious high-tension cable that utilizes carries out for medium changes the withstand voltage test originally carried out in high-altitude into ground; (2) reduce testing equipment and have bad luck expense; (3) difficult problem that test space safe distance is inadequate and workmen is safe is solved; (4) adopt connection in series-parallel array mode flexibly for test reactor, meet the requirement of test frequency.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
A kind of overhead traveling crane high voltage supply system electrical equipment of the present invention whole group of alternating current withstand voltage test method, comprises following construction procedure:
A kind of overhead traveling crane high voltage supply system electrical equipment whole group of alternating current withstand voltage test method, comprises following construction procedure:
Prepare before step one, test; Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length;
Prepare high-voltage switch gear mainly to comprise: on-load switch, current transformer, voltage transformer (VT) and support insulator; Prepare high pressure trolley and support insulator;
The configuration of step 2, testing equipment and the selection of the mode of connection; The testing equipment suitable according to the electric capacity size configure of test specimen and the mode of connection; Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable electric capacity is comparatively large, in capacitive characteristics; Trolley and high-tension switch cabinet electric capacity very little, in resistive characteristic; When carrying out whole group of ac voltage withstanding, by size configure AC frequency conversion series resonant testing equipment and the mode of connection of electric cable capacitance amount;
Step 3, when not considering the electric capacity of high-voltage switch gear and high pressure trolley, calculate overhead traveling crane high voltage supply system total capacitance, computing method are: C=0.284uF × (0.2+0.1)=0.0852uF; Need before the test to pass through computing formula
reasonable disposition reactor, adopts 3 inductance values to be that the reactor of 3.33H is in parallel, obtains test frequency
Step 4, inlet wire cable AC voltage withstand test; AC frequency conversion series resonant testing equipment is placed on higher level electric substation, carries out inlet wire cable AC voltage withstand test; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, and testing equipment will be automatically found tuning-points, start test; Because the withstand voltage standard-required frequency of the AC frequency conversion series resonance of national standard to cable is between 20-300HZ.Therefore be the martingale of the reactor parallel connection of 3.33H by 3 inductance values, can testing requirements be met; Trial voltage is by national standard U
examination=2.5U
0=2.5 × 8.7=21.75KV.
Step 5, high voltage supply system whole group of AC voltage withstand test; Testing equipment placement location is constant, close high-voltage switch gear, and whole electric power system is communicated with, and carries out overhead traveling crane high voltage supply system electrical equipment whole group of AC voltage withstand test, the selection of the mode of connection, by calculating gained, adopts 3 inductance values to be the martingale of the reactor parallel connection of 3.33H; Trial voltage is by national standard: 3KV on-load switch U
examination=25KV, 3KV voltage transformer (VT) U
examination=20KV, 3KV current transformer U
examination=20KV, 3KV support insulator U
examination=22KV, YJV-8.7/10KV high-tension cable U
examination=2.5U
0=2.5 × 8.7=21.75KV, routine tests at need, can connect together and test, and testing standard should adopt the minimum standard in the various equipment of connection; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, presses test button, testing equipment will be automatically found tuning-points, start test; In process of the test, when tested thing breaks down, different high-voltage switch gear routine tests can be disconnected respectively, reduce malfunction elimination scope, until find trouble spot;
Preferred: described overhead traveling crane electric power system incoming power cable selects that model is YJV-8.7/10KV, sectional area is 3 × 150mm2, length 200m.
Preferred: model, the sectional area of described link cable are identical with overhead traveling crane electric power system incoming power cable, joint length 20m.
Preferred: the resistive loads such as described high-voltage switch gear require that frequency is at 50HZ.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. overhead traveling crane high voltage supply system electrical equipment whole group of alternating current withstand voltage test method, is characterized in that, comprise following construction procedure:
Prepare before step one, test; Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length;
Prepare high-voltage switch gear mainly to comprise: on-load switch, current transformer, voltage transformer (VT) and support insulator; Prepare high pressure trolley and support insulator;
The configuration of step 2, testing equipment and the selection of the mode of connection; The testing equipment suitable according to the electric capacity size configure of test specimen and the mode of connection; Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable electric capacity is comparatively large, in capacitive characteristics; Trolley and high-tension switch cabinet electric capacity very little, in resistive characteristic; When carrying out whole group of ac voltage withstanding, by size configure AC frequency conversion series resonant testing equipment and the mode of connection of electric cable capacitance amount;
Step 3, when not considering the electric capacity of high-voltage switch gear and high pressure trolley, calculate overhead traveling crane high voltage supply system total capacitance, computing method are: C=0.284uF × (0.2+0.1)=0.0852uF; Need before the test to pass through computing formula
reasonable disposition reactor;
Step 4, inlet wire cable AC voltage withstand test; AC frequency conversion series resonant testing equipment is placed on higher level electric substation, carries out inlet wire cable AC voltage withstand test; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, and testing equipment will be automatically found tuning-points, start test;
Step 5, high voltage supply system whole group of AC voltage withstand test; Testing equipment placement location is constant, close high-voltage switch gear, whole electric power system is communicated with, carry out overhead traveling crane high voltage supply system electrical equipment whole group of AC voltage withstand test, the selection of the mode of connection is by calculating gained, routine tests at need, can connect together and test, and testing standard should adopt the minimum standard in the various equipment of connection; During test, testing equipment guidance panel sets trial voltage, test period, selection automatic mode, presses test button, testing equipment will be automatically found tuning-points, start test; In process of the test, when tested thing breaks down, different high-voltage switch gear routine tests can be disconnected respectively, reduce malfunction elimination scope, until find trouble spot.
2. a kind of overhead traveling crane high voltage supply system electrical equipment according to claim 1 whole group of alternating current withstand voltage test method, it is characterized in that, described overhead traveling crane electric power system incoming power cable selects that model is YJV-8.7/10KV, sectional area is 3 × 150mm2, length 200m.
3. a kind of overhead traveling crane high voltage supply system electrical equipment according to claim 1 whole group of alternating current withstand voltage test method, is characterized in that, model, the sectional area of described link cable are identical with overhead traveling crane electric power system incoming power cable, joint length 20m.
4. the resistive loads such as a kind of overhead traveling crane high voltage supply system electrical equipment according to claim 1 whole group of alternating current withstand voltage test method, is characterized in that, described high-voltage switch gear require that frequency is at 30-100HZ.
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| CN201510700403.1A CN105353278B (en) | 2015-10-26 | 2015-10-26 | A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method |
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| CN201510700403.1A CN105353278B (en) | 2015-10-26 | 2015-10-26 | A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method |
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Citations (7)
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2015
- 2015-10-26 CN CN201510700403.1A patent/CN105353278B/en active Active
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| US5514967A (en) * | 1994-08-16 | 1996-05-07 | Zelm; Richard J. | Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level |
| JPH08136609A (en) * | 1994-11-11 | 1996-05-31 | I K D:Kk | Withstand voltage testing device |
| CN201697996U (en) * | 2010-02-04 | 2011-01-05 | 厦门中唐电气有限公司 | Withstand voltage and leakage testing device for insulated safety device |
| JP2012230089A (en) * | 2011-04-27 | 2012-11-22 | Sharp Corp | High voltage inspection device |
| CN102368089A (en) * | 2011-11-17 | 2012-03-07 | 江苏省电力公司南京供电公司 | Test method of carrying out partial discharge measurement based on high-voltage cable voltage withstand test |
| CN103207358A (en) * | 2013-04-15 | 2013-07-17 | 广东电网公司佛山供电局 | High-voltage power cable nondestructive detection device |
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| 吴云飞: "XLPE电缆主绝缘状态检测方法的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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