CN106410674A - Hot-line work method for 10-kV distribution line and equipment - Google Patents

Abstract

The invention relates to a live working method applied to 10kV power distribution lines and equipment with narrow working space, and belongs to the technical field of power distribution live work. It includes the following steps: the operator uses the insulation operating rod to place the insulation shielding appliance on the left live conductor and the grounding body, and installs the insulation shielding appliance for the right live conductor and the grounding body in the same way; after that, the operator returns to the ground and moves the insulation The ladder to the working position corresponds to the ground; the operator steps on the insulated ladder again, approaches the working position, and uses the insulating operating rod to carry out live work; during the operation process, the operator and the electrified body maintain a minimum safe distance of at least 0.6 meters , Keep a minimum safety distance of at least 0.4 meters from the ground; the whole process of operation needs special supervision. The present invention can be applied to live operation of 10kV power distribution lines and equipment in a narrow space, and can implement high-efficiency operation under the premise of ensuring the safety of operators and without power failure of 10kV power distribution lines and equipment.

Description

A 10kV power distribution line and live working method for equipment

technical field

The invention relates to a live working method applied to 10kV power distribution lines and equipment with narrow working space, and belongs to the technical field of power distribution live work.

Background technique

10kV distribution lines and equipment are an important part of my country's power grid. Live work on 10kV distribution lines is one of the important means to reduce the power outage time of the distribution network and improve the reliability of power supply and high-quality service levels of the distribution network. At present, the live work of power distribution has been widely carried out in China, and the live work is mainly carried out by insulated bucket trucks. When the 10kV insulated bucket arm truck performs live work, its working height shall not be lower than 3.5 meters; in the actual working environment, the height of some 10kV power distribution lines and equipment maintenance operations is only 3 meters or even lower, and due to the narrow working space, resulting in The 10kV insulated arm truck cannot perform operations.

In view of the above problems that 10kV insulated bucket trucks cannot effectively carry out live work due to the limitation of working height and space, it is necessary to provide a live working method for 10kV power distribution lines and equipment with narrow working space to ensure safe and effective implementation of the work.

Contents of the invention

The purpose of the present invention is to provide a 10kV power distribution line and equipment live working method, which can be applied to 10kV power distribution lines and equipment live work in a narrow space, and can be used on 10kV power distribution lines and equipment under the premise of ensuring the safety of operators. Implement efficient operation without power failure of equipment.

In order to achieve the above object, the technical solution adopted by the present invention is: a 10kV power distribution line and equipment live working method, which is characterized in that it includes the following steps:

Step 1: Formulate a construction operation plan, which includes the name of the operation line, pole number, the number of insulating and shielding appliances, the installation position of the insulating ladder, and the fixed position of the insulating rope;

Step 2: Prepare before the start of work. After obtaining the work permit, conduct a pre-start meeting, division of labor, and layout of on-site safety measures according to the operation plan;

Step 3: Install the insulating ladder and fasten the insulating rope, fix the insulating rope on a firm component, make the insulating ladder stable, and send someone to support the insulating ladder;

Step 4: The operator wears personal insulating protective equipment, and after being approved by the person in charge of the work, steps on the insulating ladder, fastens the seat belt, and approaches the working position;

Step 5: The operator uses the insulating operating rod to place the insulating shielding device on the live conductor and the grounding body on the left to ensure effective insulation shielding and ensure that the phases of the charged body will not be short-circuited by the insulating operating rod; then the operator returns On the ground, move the insulating ladder to the position of the phase charged body on the right corresponding to the ground, and install the insulation and shielding equipment for the live conductor and the grounding body on the right side in the same way;

Step 6: After that, the operator returns to the ground, and moves the insulating ladder to the corresponding ground at the working position; after the permission of the person in charge of the work, the operator steps on the insulating ladder again, fastens the safety belt, approaches the working position, and uses the insulating operating rod Carry out live work; during the operation process, the operator shall maintain a minimum safe distance of at least 0.6 meters from the live body, and a minimum safe distance of at least 0.4 meters from the ground; the whole process of the operation shall be supervised by a special person;

Step 7: After the operation is completed, the operator checks whether there are factors affecting safety in the operation area and whether there are any leftovers at high altitude; remove all insulating and shielding appliances, and return to the ground;

Step 8: Count the number of people and clean up the scene.

The 10kV power distribution line and equipment include one or more of needle-type ceramic bottles, cross-arms, screws, clamps, wires (busbars) and the like of the 10kV power distribution line.

The effective insulation length of the insulating ladder should not be less than 1 meter, and the whole ladder length can be 1-3 meters.

The effective insulating length of the insulating rope shall not be less than 0.4 meters, and its total length may be 1-5 meters.

The minimum effective insulation length of the insulating operating rod is maintained at not less than 0.7m, the total length of the operating rod can reach 2 meters, and the insulation resistance of the insulating operating rod is not less than 700MΩ.

The personal insulating protective equipment includes: 10kV insulating cap, insulating clothing, insulating gloves, and insulating shoes.

As for the insulating shielding appliance, when multiple insulating shielding appliances are used together and the insulating shielding areas overlap, the overlapping portion shall not be less than 0.15m.

The charged body refers to a charged wire (bus bar) and wire clamp.

The live work in the step 6 is that after the operator puts on the personal insulating protective equipment, he uses the insulating rod to carry out the live work on the target.

The invention has the effect that: it can solve the technical problem of carrying out live work on 10kV power distribution lines and equipment with a narrow working space (referring to height less than 3.5 meters), and can realize 10kV power distribution lines under the condition of ensuring the safety of operators And equipment live work, to avoid power outages in the power distribution system caused by the work, and reduce the adverse impact of the work on the normal power consumption of users.

Description of drawings

Fig. 1 is a schematic diagram of the implementation of the method for implementing live work using an insulated operating rod for 10kV distribution lines and equipment involved in the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

The 10kV power distribution line and equipment of the present invention include needle-type porcelain vases, cross arms, screws, wire clips, wires (busbars) and the like of the 10kV power distribution line.

As shown in Figure 1, a live working method for 10kV power distribution lines and equipment includes the following steps:

Step 1: Formulate an optimized construction operation plan, which includes the name of the operation line, pole number, the number of insulating and shielding appliances 2, the installation position of the insulating ladder 1, the fixed position of the insulating rope 7, etc.; Prepare operation instructions and cards according to the requirements of the operation procedures;

Step 2: Prepare before starting work. After obtaining the work permit, according to the operation plan (operation instruction book), carry out the pre-shift meeting, carry out personnel division, on-site safety measures arrangement, etc.; check whether all tools and materials meet the safety requirements, and insulate the operating rod 6 The insulation resistance value shall not be lower than 700MΩ.

Step 3: Choose an appropriate location to install the insulating ladder 1 and fasten the insulating rope 7, fix the insulating rope 7 on a firm member (firm member), make the insulating ladder 1 stable, and send someone to support it; The effective insulation length of ladder 1 must not be less than 1 meter, and its whole ladder length can be 1-3 meters, and the insulating herringbone ladder should have load-bearing capacity), the effective insulation length of insulating rope 7 must not be less than 0.4 meters, and its total length can be 1 -5 meters;

Step 4: The operator 4 wears personal insulating protective equipment, and after being approved by the person in charge of the work, steps on the insulating ladder 1, fastens the seat belt, and approaches the working position;

Step 5: The operator 4 uses the insulating operating rod 6 to place the insulating shielding tool 2 on the left live conductor 3 and the grounding body to ensure effective insulating shielding and ensure that the phases of the charged body will not be short-circuited by the insulating operating rod 6 Afterwards, the operator 4 returns to the ground, moves the insulating ladder 1 to the corresponding ground of the phase charged body position on the right side, and installs the insulating shielding appliance 2 of the live conductor 3 and the grounding body on the right side according to the same method; the effect of the shielding appliance 2 is to Keep the human body, the insulating operating rod, the live conductor and the grounding body in a good insulation relationship to ensure that the human body does not suffer from electric shock accidents;

Charged body 3 refers to: charged wires, wire clips {both charged conductors (parts)}; the left phase refers to the left phase, which can be understood as the left side when the middle phase is used as a reference;

Step 6: Afterwards, the operator 4 returns to the ground, moves the insulating ladder 1 to the corresponding ground at the working position; after being approved by the person in charge of the work, the operator 4 steps on the insulating ladder again, fastens the safety belt, approaches the working position, and uses The insulated operating rod 6 is used for live work; during the operation process, the operator shall keep a minimum safe distance 5 of at least 0.6 meters from the electrified body, and a minimum safe distance of at least 0.4 meters from the ground; the whole process of the operation shall be supervised by a special person;

Live work means that after the operator wears personal insulating protective equipment, he uses an insulating rod to perform live work on the target. The target can be a needle type porcelain bottle, a cross arm, a screw, a clamp, a wire (bus bar), etc. voltage transformer);

Step 7: After the operation is completed, the operator 4 checks whether there are factors affecting safety in the operation area and whether there are any leftovers at high altitude; after the consent of the person in charge of the work, remove all insulating and shielding appliances 2 (remove in the reverse order of the installation steps), return to the ground;

Step 8: Count the number of people, clean up the site, hold a meeting after the start of work, conduct civilized construction, and complete the work termination procedures.

The minimum effective insulation length of the insulating operating rod 6 is kept at not less than 0.7m, the total length of the operating rod can reach 2 meters, and its insulation resistance is not less than 700MΩ. The maximum operating voltage amplitude of the 10kV distribution line is 11.5kV, and the maximum operating overvoltage amplitude that may be generated by the line is considered as 44kV. In order to ensure the safety of the operators 4, under the action of the maximum operating voltage and the maximum operating overvoltage of the system, the insulating operating rod 6 should be able to withstand the voltage to ensure the safety of the operators, and its performance should meet the "State Grid Corporation Regulations Electricity Safety Work Regulations" (Line part)" stipulates that the power frequency withstand voltage test voltage level of the 10kV insulating operating rod is 45kV/1min.

Personal insulating protective equipment, including: 10kV insulating cap, insulating clothing, insulating gloves, insulating shoes. Operator 4 must wear 10kV insulating caps, insulating shoes, insulating clothing, and insulating gloves; personnel supporting insulating ladders must wear 10kV insulating caps, insulating shoes, insulating clothing, and insulating gloves and stand on insulating mats. Other personnel are not allowed to touch the escalator personnel and the operators on the insulated ladder 1.

For insulating shielding appliances, when multiple insulating shielding appliances 2 are used together and the insulating shielding areas overlap, the overlapping part shall not be less than 0.15m.

In high-altitude areas, the relative air pressure correction method should be used to correct the safety distance according to the actual situation of the 10kV distribution line live working gap and the insulation tools and safety protection equipment to ensure the safety of the workers. The invention can carry out live work in the 10kV power distribution area where live work vehicles cannot enter due to the narrow working space, or where it is inconvenient to park.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (8)

1. a kind of 10kV distribution line and equipment live operational method are it is characterised in that comprise the steps：

Step 1：Formulate construction operation scheme, described scheme includes the title of service line, bar number, the number of insulation masking apparatus Amount, the installation site of insulation double ladder, the fixed position of insulation ropes；

Step 2：Prepare before going into operation, after obtaining work permit, open pre-shift meeting, enter administrative staff's division of labor, scene peace according to operation scheme Full measure arrangement；

Step 3：Insulation double ladder is installed and fastens insulation ropes, insulation ropes is fixed on firm component, makes insulation people Word ladder is firm, and sends someone to help insulation double ladder；

Step 4：Operating personnel dresses good individual's insulating protection apparatus, after work director's license, pedals insulation double ladder, is Good seat belt, near job position；

Step 5：Operating personnel using insulating bar, the masking apparatus that insulate is placed on left side energized conductor and grounding body, really Protect effectively insulation masking it is ensured that will not be by insulating bar short circuit between each phase of electrical body；Operating personnel returns to ground afterwards, Mobile insulation double ladder, to the mutually powered body position in right side corresponding ground, installs right side energized conductor and ground connection after the same method The insulation masking apparatus of body；

Step 6：Operating personnel returns to ground afterwards, and mobile insulation double ladder is to job position corresponding ground；Through the director that works After license, operating personnel pedals insulation double ladder again, fastens seat belts, and near job position, is carried out using insulating bar Livewire work；In described operation process, operating personnel keeps at least 0.6 meter of minimum safe distance with electrical body, keeps over the ground At least 0.4 meter of minimum safe distance；The overall process of operation needs special messenger to guard；

Step 7：After the completion of operation, had or not the factor of impact safety by operating personnel's Inspection region, high-altitude has or not legacy； Remove all insulation masking apparatus, return to ground；

Step 8：Check the number of people, site clearing.

2. a kind of 10kV distribution line according to claim 1 and equipment live operational method it is characterised in that described absolutely Effective insulated lengths of edge double ladder cannot be less than 1 meter.

3. a kind of 10kV distribution line according to claim 1 and equipment live operational method it is characterised in that described absolutely Effective insulated lengths of edge rope cannot be less than 0.4 meter.

4. a kind of 10kV distribution line according to claim 1 and equipment live operational method it is characterised in that described absolutely The minimum effectively insulated lengths of edge action bars remain not less than 0.7m, and the insulation resistance of insulating bar cannot be less than 700M Ω.

5. a kind of 10kV distribution line according to claim 1 and equipment live operational method are it is characterised in that described People's insulating protection apparatus includes：10kV insulator cap, insulation clothing, insulating glove, insulated shoes.

6. a kind of 10kV distribution line according to claim 1 and equipment live operational method it is characterised in that described absolutely Edge covers apparatus, and when multiple insulation masking apparatus are used in conjunction with and the shaded areas that insulate overlap, lap is not less than 0.15m.

7. a kind of 10kV distribution line according to claim 1 and equipment live operational method are it is characterised in that described band Electric body refers to powered wire, wire clamp.

8. a kind of 10kV distribution line according to claim 1 and equipment live operational method are it is characterised in that described step In rapid 6, livewire work is exactly, after operating personnel dresses good individual's insulating protection apparatus, to carry out powered work using insulating bar to target Industry, target can be needle porcelain bottle, cross-arm, screw, wire clamp.