CN111817203A - Distribution network high voltage emergency interface and its working method - Google Patents

Abstract

The present invention provides a distribution network high-voltage emergency interface and a working method thereof, which are characterized in that: insulation is fixed on the pole, and includes: a lead-out part which is electrically connected to each overhead wire through an insulated wire; The interface part of a number of insulated wires, and the switch part connecting the lead-out part and the interface part; each insulated wire of the lead-out part and the interface part forms a one-to-one corresponding disconnected electrical connection through the switch part; The other end of the insulated wire is provided with a bare end as an interface end, and is electrically connected with a grounding ring. The high-voltage emergency interface replaces the original live disconnection and fire process, optimizes the process, reduces the cost of maintaining electricity, solves the problem that live work is restricted by weather and terrain, and increases the application of medium-voltage vehicles in maintenance and faults. It can meet the needs of quick connection with 10kV medium voltage generator vehicles, bypass cables and other equipment.

Description

Distribution network high voltage emergency interface and its working method

technical field

The invention belongs to the technical field of distribution network operation, maintenance and repair, in particular to a distribution network high-voltage emergency interface and a working method thereof.

Background technique

With the improvement of power supply reliability requirements, the use of generator vehicles to ensure power supply in distribution network maintenance and faults is becoming more and more frequent. Among them, the technical solution for 10kV medium voltage generator vehicles to ensure power supply is: one 10kV medium voltage generator vehicle, one insulation The bucket arm truck is used to connect the high voltage cable of the medium voltage generator car to the line through the insulated bucket arm truck to generate electricity.

The existing medium-voltage generator car and the insulated bucket arm car have problems to maintain power supply: First, it takes up a lot of space and it is difficult to select a site. The existing medium-voltage generators need to be connected to the overhead line, which requires a large space that can accommodate the insulated boom trucks and the medium-voltage generators, and it is often difficult to find a suitable location. The second is the need to cooperate with live work, which is restricted by the weather. The existing access line of medium-voltage generators needs to be connected to and withdrawn from the high-voltage cable with live co-ordination. The operation cost is high, and live work requires good weather, which is greatly affected by the weather. At the same time, this kind of operation method has high cost of maintaining electricity. Every time the medium-voltage generator vehicle ensures the power supply task, in which the operation of connecting and exiting the line with tight electricity requires tens of thousands of construction costs.

SUMMARY OF THE INVENTION

Aiming at the defects and deficiencies of the existing solutions, the present invention provides a high-voltage emergency interface for a distribution network and a working method thereof. The pre-built emergency structure directly replaces the role of the insulating bucket truck, so that the work of the generator vehicle to ensure electricity only needs to be The medium voltage generator car can be completed independently, which greatly saves the occupied production area and the complexity and cost of operation.

Specifically, the following technical solutions are adopted:

A high-voltage emergency interface for distribution network is characterized in that: insulation is fixed on the pole, including: a lead-out part which is electrically connected to each overhead wire through insulated wires, and an interface part with the same number of insulated wires as the lead-out part. , and a switch part connecting the lead-out part and the interface part; each insulated wire of the lead-out part and the interface part forms a one-to-one corresponding disconnected electrical connection through the switch part; the other end of the insulated wire of the interface part is provided with The exposed end serves as the interface end, and is electrically connected with a grounding ring.

Preferably, the insulated wire of the lead-out portion is fixed to the overhead wire through a parallel groove wire clip to form an electrical connection.

Preferably, the switch part is an isolation knife switch or a fully enclosed drop switch, and is fixed on the pole through a cross arm.

Preferably, the interface end is fixed on the pole through a cross arm and a column-type porcelain bottle.

Preferably, the bare end is fixedly connected with a metal fitting as the interface end.

Preferably, the lead-out portion, the switch portion and the interface portion are arranged in sequence from top to bottom.

Preferably, one is configured every 2000kVA.

And according to the working method of the above distribution network high-voltage emergency interface, it is characterized in that it comprises the following steps:

Step S1: Move the medium-voltage generator car to below the high-voltage emergency interface of the distribution network;

Step S2: connecting the power output line of the medium-voltage generator car with the interface terminal and the grounding ring;

Step S3: closing and turning on the switch part;

Step S4: the medium-voltage generator set of the medium-voltage generator vehicle starts and transmits electricity;

Step S5: After the power transmission is completed, the switch part is first turned off and disconnected, and then the power output wire of the medium-voltage generator car is removed from the interface terminal and the grounding ring.

The present invention and its preferred solution replace the original live disassembly and connection fire process through the high-voltage emergency interface, optimize the process, reduce the cost of maintaining electricity, solve the problem that live work is restricted by weather and terrain, and increase the application of medium voltage vehicles in maintenance and faults. It can meet the needs of quick connection with 10kV medium voltage generator vehicles, bypass cables and other equipment. When the line needs to be re-energized urgently due to maintenance, fault, etc., under the protection of the grounding wire, the crew of the generator car and the local construction personnel will quickly lock the high-voltage cable into the exposed part of the quick access point, reduce the live coordination link, reduce staff and increase efficiency , not subject to weather restrictions.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments:

1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is a schematic diagram of a method of use according to an embodiment of the present invention;

Fig. 3 is the three-dimensional schematic diagram of the embodiment of the present invention;

In the picture: 1- Parallel groove clamp; 2- Insulated wire; 3- Isolation knife gate; 4- Grounding ring; 5- Hardware;

Detailed ways

In order to make the features and advantages of this patent more obvious and easy to understand, the following specific examples are given and described in detail as follows:

As shown in Figures 1 and 3, the solution of this embodiment is reconstructed around the pole nodes of the existing 10kv line, and a reliable high-voltage emergency interface of the distribution network is formed in a low-cost way.

First, the insulated wire 2 is electrically connected with each overhead wire (usually three) through the parallel groove wire clamp 1, and the fixing is completed. The other side of the isolation switch 3 is connected to the insulated wire 2 on the interface side. The lower end of the insulated wire 2 on the interface side is fixed on the pole through the cylindrical porcelain bottle 6, and is provided with a grounding ring 4. At the same time, the end is provided with a bare end connected to a fitting 5, which is used as an interface.

As shown in Figure 2, when the power grid is working normally, the isolation switch 3 is disconnected to isolate the interface end from the circuit. Since the interface end is located relatively low, accidental electric shock can be prevented. When the transmission line cannot guarantee the normal power supply, the generator car needs to be connected to realize the external power supply. When the generator car quickly connects the circuit through the interface, the isolation switch 3 is closed to connect the standby power supply circuit.

The fittings 5 fixedly connected at the interface end play a role in facilitating the connection and disconnection of the generator car, which further improves the efficiency.

As shown in FIG. 3 , in this embodiment, each fixing member is fixed by a plurality of cross arms vertically arranged and fixed on the pole, and at the same time, each group of insulated wires 2 is relatively separated in space, so as not to cross. Happening.

In the implementation of the solution of this embodiment, it is installed on the overhead line in the load-intensive area and can accommodate the location of medium-voltage generators, and one set per 2000kVA is configured to meet the fast connection with 10kV medium-voltage generators, bypass cables and other equipment. need. When the line needs to be re-energized urgently due to maintenance, failure, etc., under the protection of the grounding wire, the crew of the generator car and the local construction personnel will quickly lock the high-voltage cable into the exposed part of the quick access point, reduce the live coordination link, reduce staff and increase efficiency , not subject to weather restrictions.

Based on the structural design provided by this embodiment, its working method may include the following steps:

Step S1: Move the medium-voltage generator car to below the high-voltage emergency interface of the distribution network;

Step S2: connect the power output line of the medium-voltage generator car to the interface terminal and the grounding ring 4;

Step S3: turn on the switch part;

Step S4: the medium-voltage generator set of the medium-voltage generator vehicle starts and transmits electricity;

Step S5 : after the power transmission is completed, the switch part is turned off first, and then the power output wire of the medium-voltage generator car is removed from the interface terminal and the grounding ring 4 .

This patent is not limited to the above-mentioned best embodiment, anyone can come up with other various forms of distribution network high-voltage emergency interface and its working method under the inspiration of this patent. and modifications, shall fall within the scope of this patent.

Claims (8)

1. The utility model provides a join in marriage net high pressure emergency interface which characterized in that: insulating the fixing on the pole includes: the switch part is connected with the leading-out part and the interface part; each insulated wire of the leading-out part and the interface part forms one-to-one corresponding on-off electrical connection through the switch part; the other end of the insulated wire of the interface part is provided with an exposed end as an interface end and is electrically connected with a grounding ring.

2. The distribution network high-voltage emergency interface of claim 1, wherein: and the insulated conductor of the leading-out part is fixed with the overhead wire through a parallel groove clamp and electrically connected.

3. The distribution network high-voltage emergency interface of claim 1, wherein: the switch part is an isolation switch or a fully-closed drop switch and is fixed on the electric pole through a cross arm.

4. The distribution network high-voltage emergency interface of claim 1, wherein: the interface end is fixed on the electric pole through a cross arm and a column type porcelain bottle.

5. The distribution network high-voltage emergency interface of claim 1, wherein: and the exposed end is fixedly connected with a hardware fitting as an interface end.

6. The distribution network high-voltage emergency interface of claim 1, wherein: the leading-out part, the switch part and the interface part are sequentially arranged from top to bottom.

7. The distribution network high-voltage emergency interface of claim 1, wherein: one for every 2000kVA configuration.

8. The working method of the high-voltage emergency interface of the distribution network according to any one of claims 1 to 7, characterized by comprising the following steps:

step S1: moving the medium-voltage generator car to the position below a high-voltage emergency interface of a distribution network;

step S2: connecting a power output line of the medium-voltage generator car with the interface end and the grounding ring;

step S3: switching on the switching part;

step S4: starting a medium-voltage generator set of the medium-voltage generator car and transmitting power;

step S5: after the power transmission is finished, the switch part is turned off, and then the power output line of the medium-voltage power generation vehicle is detached from the interface end and the grounding ring.

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