CN105182193A - owts testing method for short-time power failure of distribution power cable - Google Patents
owts testing method for short-time power failure of distribution power cable Download PDFInfo
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- CN105182193A CN105182193A CN201510523902.8A CN201510523902A CN105182193A CN 105182193 A CN105182193 A CN 105182193A CN 201510523902 A CN201510523902 A CN 201510523902A CN 105182193 A CN105182193 A CN 105182193A
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Abstract
The invention relates to an owts testing method for a short-time power failure of a distribution power cable, and the method comprises the steps: (1) confirming that a load current is less than a rated current of rubber insulating cable replacement equipment; (2) cutting off switches at two sides of a cable circuit to be tested (owts testing), and removing a cable terminal connected with the switches; (3) confirming that switches at two sides are cut off; (4) enabling terminals at two ends of a rubber insulating cable replacement part to be connected to the switches at two sides of the cable circuit to be tested (owts testing); (5) confirming that the rubber insulating cable replacement part is consistent with an original phase sequence; (6) switching on the power-supply side switch; (7) switching on the power-receiving side switch, and enabling the rubber insulating cable replacement part to be put in operation; (8) monitoring the current of a rubber insulating cable; (9) carrying out implementation and completing the owts testing of the cable.
Description
Technical field
The invention belongs to cable machinery detection technique field, the owts method of testing that especially a kind of distribution power cable has a power failure in short-term.
Background technology
At present, distribution power cable is except carrying out routine withstand voltage test, after Condition Based Maintenance Putting in Practice, more effective off-line test method is exactly owts test, the partial discharge quantity of cable and waveform are tested, thus carry out the equipment general level of the health grasping cable, this method has been applied to have in the external good areas of operation level such as Singapore and has been tested effect preferably.But this method is a kind of off-line testing method, cannot live detection be carried out when testing, cable first must be had a power failure.Along with the raising that power supply reliability requires, a lot of user can only accept the power failure in short-term within 10 minutes, and will carry out owts test job like this cannot carry out.This patent is exactly the owts of the power failure in short-term method of testing will inventing a kind of distribution cable, under the reliable prerequisite of guarantee user power utilization, is grasped the general level of the health of cable machinery by owts.
Summary of the invention
The object of the invention is to overcome prior art deficiency, the owts method of testing that a kind of distribution power cable has a power failure in short-term is provided.
The technical solution used in the present invention is:
The owts method of testing that distribution power cable has a power failure in short-term, the steps include:
(1) confirm that load current is less than India-rubber cable alternate device rated current;
(2) disconnect the switch treating owts test cable circuit both sides, remove the cable termination that switch therewith connects;
(3) confirm that both sides switch disconnects;
(4) the terminal at India-rubber cable Substitute For Partial two ends is connected to the switch treating owts test cable circuit both sides;
(5) confirm that India-rubber cable Substitute For Partial is consistent with original system phase sequence;
(6) power transmission side of closing switch;
(7) power side of closing switch, makes India-rubber cable Substitute For Partial put into operation;
(8) monitor India-rubber cable electric current;
(9) implement and complete cable owts to test.
And, with reference to step (2) ~ sequence of operation (7), exit bypath system, recover to have overhauled cable line and run.
Advantage of the present invention and good effect are:
After the owts method of testing that distribution power cable provided by the invention has a power failure in short-term only need complete with test before owts test starts, carry out power failure operation in short-term, be generally less than 10 minutes, test period (4-5 hours) uses India-rubber cable to substitute former twisted polyethylene cable and powers, ensure that responsible consumer, large charge circuit, protect the power supply reliability of the circuits such as electric line, the state-detection of cable can be completed simultaneously, find out the cable that problem is put in existence office.India-rubber cable has good flexible and returnability, can reuse, and discharges conveniently on the one hand, can reuse on the other hand, can not cause investment waste.
Embodiment:
Below by embodiment, the invention will be further described, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
The owts method of testing that distribution power cable has a power failure in short-term, the steps include:
(1) confirm that load current is less than India-rubber cable alternate device rated current;
(2) disconnect the switch treating owts test cable circuit both sides, remove the cable termination that switch therewith connects;
(3) confirm that both sides switch disconnects;
(4) the terminal at India-rubber cable Substitute For Partial two ends is connected to the switch treating owts test cable circuit both sides;
(5) confirm that India-rubber cable Substitute For Partial is consistent with original system phase sequence;
(6) power transmission side of closing switch;
(7) power side of closing switch, makes India-rubber cable Substitute For Partial put into operation;
(8) monitor India-rubber cable electric current;
(9) implement and complete cable owts to test;
With reference to step (2) ~ sequence of operation (7), exit bypath system, recover to have overhauled cable line and run.
In the present embodiment, India-rubber cable substitute-in short-term power failure owts test cable circuit instrument be equipped with see the following form
Job step
1. Work tool accumulating and detection
Use India-rubber cable and relevant device must check it, it is qualified to detect.Receive insulating tool, safety appliance and auxiliary implement, use electric pressure and the test period of Work tool should be checked.Receive insulating tool, should check that well-tended appearance can't harm.Insulating tool and safety appliance, 2500V insulation meter or insulation tester must be used to carry out Insulation monitoring, and resistance must not lower than 700MW.Before Work tool transport, various Work tool should leave in tool bag or tool box, and metal tools and insulating tool should separately load and transport, and causes appearance to damage to prevent mutual grazing.
2. the preparation before execute-in-place
Checking apparatus title and numbering.Convene staff to hand over work to one's successor task, carry out dangerous point and inform, explain safety practice and technical measures, confirm that each shift member knows to shift member, check that whether the shift member state of mind is good, whether personnel are suitable.
3. operation steps
(1) staff enters operation field, and work car enters scene, is parked in correct position, carries out every preliminary work, measures and treats owts test cable load current, confirms that load current is less than bypath system rated current; Lay India-rubber cable and relevant device and carry out insulation resistance detection;
(2) owts test cable power side switch and power transmission side switch are treated in disconnection successively; Take the connection of maintenance cable termination and both sides switch apart, will cable be overhauled out of service; Bypass cable terminal is connected with both sides switch, checks and confirm that phase sequence is errorless.Close power transmission side, power side switch successively, bypath system put into operation, and monitors bypass cable electric current;
(3) treat owts test cable and carry out owts test.
Necessary safety practice should be taked in tested cable two ends, if special messenger is guard, prevents personnel to be strayed into test site;
Should examine the state of tested cable before on-test, whether cable two ends completely disconnect with other equipment of electrical network, and three-phase is unsettled, separates safe distance, except tested mutually except, other two corresponding ground connection, lightning arrester and PT need dismounting;
After the license obtaining on-the-spot responsible official, carry out applied voltage test;
When changing wiring or off-test, first should disconnect high-voltage power supply, equipment and cable are fully discharged, then carry out other operations;
(4) bypass cable power side, power transmission side switch is disconnected successively; Take apart bypass cable terminal and the connection of both sides switch, bypass cable is out of service; Maintenance cable termination is connected with both sides switch, checks and confirm that phase sequence is errorless; Close power transmission side, power side switch successively, and recovery system runs.
(5) India-rubber cable and relevant device is regained.
4 safety notices
Cable must not contact with ground or other hard object in the process of discharging, and must not be stressed.Strengthen site safety, red leukorrhea and warning mark have been enclosed in perform region.Tighten traffic management, personnel special messenger should be increased if desired and assist to safeguard traffic order.Must not be carried out this when safe distance specifies and cannot take safety measures and work joint using circuit to work to be less than with upper layer circuit.Upper and lower tool for transmitting, material all should use insulating cord, forbid to throw, throw away.
Although disclose embodiments of the invention for the purpose of illustration, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the present invention and claims, various replacement, change and amendment are all possible, therefore, scope of the present invention is not limited to the content disclosed in embodiment.
Claims (2)
1. the owts method of testing that has a power failure in short-term of distribution power cable, is characterized in that: the steps include:
(1) confirm that load current is less than India-rubber cable alternate device rated current;
(2) disconnect the switch treating owts test cable circuit both sides, remove the cable termination that switch therewith connects;
(3) confirm that both sides switch disconnects;
(4) the terminal at India-rubber cable Substitute For Partial two ends is connected to the switch treating owts test cable circuit both sides;
(5) confirm that India-rubber cable Substitute For Partial is consistent with original system phase sequence;
(6) power transmission side of closing switch;
(7) power side of closing switch, makes India-rubber cable Substitute For Partial put into operation;
(8) monitor India-rubber cable electric current;
(9) implement and complete cable owts to test.
2. the owts method of testing that has a power failure in short-term of distribution power cable according to claim 1, is characterized in that: with reference to step (2) ~ sequence of operation (7), exit bypath system, recover to have overhauled cable line and run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523902.8A CN105182193A (en) | 2015-08-24 | 2015-08-24 | owts testing method for short-time power failure of distribution power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510523902.8A CN105182193A (en) | 2015-08-24 | 2015-08-24 | owts testing method for short-time power failure of distribution power cable |
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| Publication Number | Publication Date |
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| CN105182193A true CN105182193A (en) | 2015-12-23 |
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| CN201510523902.8A Pending CN105182193A (en) | 2015-08-24 | 2015-08-24 | owts testing method for short-time power failure of distribution power cable |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305901A (en) * | 2011-06-03 | 2012-01-04 | 西安福润德电子科技有限公司 | Method for detecting cable fault point by impact oscillating wave principle |
| CN103499778A (en) * | 2013-09-26 | 2014-01-08 | 国家电网公司 | Method for evaluating insulation performance of power cable in stage with voltage being 35kV or below 35kV |
| CN104502825A (en) * | 2014-12-02 | 2015-04-08 | 西安交通大学 | OWTS power cable oscillation wave test equipment and test method |
-
2015
- 2015-08-24 CN CN201510523902.8A patent/CN105182193A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305901A (en) * | 2011-06-03 | 2012-01-04 | 西安福润德电子科技有限公司 | Method for detecting cable fault point by impact oscillating wave principle |
| CN103499778A (en) * | 2013-09-26 | 2014-01-08 | 国家电网公司 | Method for evaluating insulation performance of power cable in stage with voltage being 35kV or below 35kV |
| CN104502825A (en) * | 2014-12-02 | 2015-04-08 | 西安交通大学 | OWTS power cable oscillation wave test equipment and test method |
Non-Patent Citations (3)
| Title |
|---|
| 牛捷: "10kV电缆线路不停电作业旁路系统研究", 《中国电业（技术版）》 * |
| 罗俊华 等: "15kV柔性旁路电缆的不停电抢修作业技术", 《高电压技术》 * |
| 肖辉 等: "10kV电缆线路不停电作业旁路系统", 《大众用电》 * |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151223 |
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| RJ01 | Rejection of invention patent application after publication |