CN105098648A - Short-time power-cut operation method for cable line between two ring main units - Google Patents

Abstract

The invention relates to a short-time power-cut operation method for a cable line between two ring main units, comprising the following steps: (1) laying flexible cables, connecting the flexible cables by a middle joint, and connecting a corresponding high-voltage adapter cable with the flexible cables; (2) ensuring that spaced standby circuit breakers of ring main units at the two ends of a bypass system are switched off; (3) inserting the terminal heads of the high-voltage adapter cable into the ring main units in an uncharged state; (4) switching on the circuit breakers at the two ends of the bypass system to put the bypass system into operation; (5) after ensuring that the bypass system works normally, switching off circuit breakers at the two ends of a faulty cable to make the faulty cable exit; (6) discharging the faulty cable, and repairing the faulty cable; (7) connecting the terminal heads at the two ends of the cable line after repair to the ring main units; (8) switching on the circuit breakers at the two ends of the cable line after repair, and ensuring that the circuit breakers work normally; and (9) switching off circuit breakers at the two ends of a bypass cable, discharging the bypass cable, pulling the high-voltage adapter cable out of the ring main units, and making the bypass system exit.

Description

A kind of cable line power failure operation method in short-term between two ring main units

Technical field

The invention belongs to cable machinery detection technique field, cable line power failure operation method in short-term between especially a kind of two ring main units.

Background technology

Bypass uninterrupted operation technology is one and improves the novel charged operation technique of distribution network reliability, and it in a short period of time, can build a set of inicdental bypath electric power system, under power supply state incessantly, completes the scheduled overhaul work of circuit; In addition, for more unmanageable overhead transmission line breakdown repair and cable line fault repairing, this technology can be applied and carry out temporary power, reduce power failure range to greatest extent, reduce power failure to customer impact.

Summary of the invention

The object of the invention is to overcome prior art deficiency, a kind of cable line power failure operation method in short-term between two ring main units is provided.

The technical solution used in the present invention is:

A kind of cable line power failure operation method in short-term between two ring main units, the steps include:

(1) lay flexible cable, utilize transition joint flexible cable to couple together, and the high pressure transit cable of correspondence is connected with flexible cable;

(2) guarantee that the circuit breaker of bypath system two ends ring main unit standby spacing is in open position;

(3) in uncharged situation, high pressure transit cable terminals are inserted ring main unit;

(4) the circuit breaker at bypath system of closing two ends, makes bypath system put into operation;

(5), after confirmation bypath system is working properly, the circuit breaker at open failure cable two ends, makes failure cable out of service;

(6) failure cable is discharged, trouble shooting cable;

(7) the terminals at the cable line two ends of having fixed are connected on ring main unit;

(8) close the circuit breaker at the cable line two ends of having fixed, and confirm that it is working properly;

(9) disconnect the circuit breaker at bypass cable two ends, bypass cable is discharged, high pressure transit cable is extracted from ring main unit, make bypath system out of service.

Advantage of the present invention and good effect are:

Between two ring main units provided by the invention, power failure operation method is compared with prior art in short-term for cable line, the present invention has filled up the blank of the power failure operation in short-term of cable line between two ring main units, use the bypass damage repair technology that do not have a power failure can meet distribution user service without power-off, the job requirements such as equipment replacement, be applied to the reliable power supply in the important great place of temporary power of responsible consumer, significantly promote power supply reliability index, reduce the interruption duration of scheduled overhaul and troubleshooting, launched by bypass flexible cable system, realize 30min emergent restoring in 3km to power, interruption duration more than 80% can be reduced for 8 hours interruption maintenances, many sales of electricity more than 20000kwh.

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.

A kind of cable line power failure operation method in short-term between two ring main units, the steps include:

1) personnel lines up to read out work ticket, work director assign a work task, explain safety measure, specifically divide the work.

2) lay flexible cable, utilize transition joint flexible cable to couple together, and the high pressure transit cable of correspondence is connected with flexible cable.

3) guarantee that the circuit breaker of bypath system two ends ring main unit standby spacing is in open position, 4) in uncharged situation, high pressure transit cable terminals are inserted ring main unit.

5) circuit breaker at bypath system of closing two ends, makes bypath system put into operation.

6) after confirmation bypath system is working properly, the circuit breaker at open failure cable two ends, makes failure cable out of service.

7) failure cable is discharged, trouble shooting cable.

8) terminals at the cable line two ends of having fixed are connected on ring main unit.

9) close the circuit breaker at the cable line two ends of having fixed, and confirm that it is working properly.

10) disconnect the circuit breaker at bypass cable two ends, bypass cable is discharged, high pressure transit cable is extracted from ring main unit, make bypath system out of service.

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 (1)

1. a cable line power failure operation method in short-term between two ring main units, is characterized in that: the steps include:

(1) lay flexible cable, utilize transition joint flexible cable to couple together, and the high pressure transit cable of correspondence is connected with flexible cable;

(2) guarantee that the circuit breaker of bypath system two ends ring main unit standby spacing is in open position;

(3) in uncharged situation, high pressure transit cable terminals are inserted ring main unit;

(4) the circuit breaker at bypath system of closing two ends, makes bypath system put into operation;

(5), after confirmation bypath system is working properly, the circuit breaker at open failure cable two ends, makes failure cable out of service;

(6) failure cable is discharged, trouble shooting cable;

(7) the terminals at the cable line two ends of having fixed are connected on ring main unit;

(8) close the circuit breaker at the cable line two ends of having fixed, and confirm that it is working properly;

(9) disconnect the circuit breaker at bypass cable two ends, bypass cable is discharged, high pressure transit cable is extracted from ring main unit, make bypath system out of service.