CN113410791A - Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network - Google Patents
Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network Download PDFInfo
- Publication number
- CN113410791A CN113410791A CN202110738892.5A CN202110738892A CN113410791A CN 113410791 A CN113410791 A CN 113410791A CN 202110738892 A CN202110738892 A CN 202110738892A CN 113410791 A CN113410791 A CN 113410791A
- Authority
- CN
- China
- Prior art keywords
- voltage
- cable
- power supply
- low
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000017525 heat dissipation Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/52—Mobile units, e.g. for work sites
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a non-power-off operation method for connecting a power supply vehicle to a medium-voltage power distribution network, which comprises a 10KV cable and a low-voltage power supply vehicle, wherein a movable box transformer vehicle is arranged between the 10KV cable and the low-voltage power supply vehicle, the movable box transformer vehicle and the low-voltage power supply vehicle are both provided with low-voltage connectors, the movable box transformer vehicle and the low-voltage power supply vehicle are connected through a low-voltage output cable, the movable box transformer vehicle is provided with a high-voltage connector, the movable box transformer vehicle is connected with a high-voltage lead-in cable, and the high-voltage cable is connected to the 10KV cable through a high-voltage cable coupler. According to the invention, the mobile box transformer substation vehicle is additionally arranged between the low-voltage power supply vehicle and the 10KV cable, and the voltage is boosted and reduced through the boosting/reducing transformer in the mobile box transformer substation vehicle, so that the low-voltage power supply vehicle is butted with the medium-voltage power grid. And a ring main unit and a low-voltage switch cabinet are arranged in the mobile box transformer substation, and can be used as a temporary power supply emergency power supply to realize uninterrupted power supply for users.
Description
Technical Field
The invention relates to the technical field of power vehicles, in particular to a non-power-outage operation method for connecting a power vehicle to a medium-voltage power distribution network.
Background
With the improvement of comprehensive national power and the increasing enhancement of international influence in China, the opportunity of carrying out international important political and economic communication activities is more and more. The important movable power supply guarantee has the characteristics of various temporary loads, large guarantee range scale, high security protection level, multiple uncertain factors and the like, and power failure is basically not allowed. The mobile emergency power supply vehicle and the UPS become emergency vehicles which provide emergency standby power supplies and emergency equipment for places such as electric power, communication, emergency and military and the like, and can provide stable electric energy for the field.
The low-voltage power supply vehicle mainly supplies power at a low-voltage side of 0.4kV, and when the power supply vehicle needs to adopt a 10kV medium-voltage line for power supply, the low-voltage power supply vehicle cannot provide the required voltage level. When a 10kV medium-voltage power grid breaks down, a low-voltage power supply vehicle cannot be adopted nearby to conduct uninterrupted maintenance operation on the medium-voltage power grid in the prior art, and the medium-voltage power supply vehicle needs to be allocated to conduct maintenance, so that maintenance time is delayed.
Disclosure of Invention
The invention aims to provide a non-power-outage operation method for accessing a power supply vehicle to a medium-voltage distribution network, aiming at solving the problem that the conventional low-voltage power supply vehicle cannot be accessed to the medium-voltage distribution network.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a non-power-outage operation method for a power supply vehicle to be connected to a medium-voltage power distribution network comprises a 10KV cable and a low-voltage power supply vehicle, wherein a mobile box transformer vehicle is arranged between the 10KV cable and the low-voltage power supply vehicle, low-voltage connectors are arranged on the mobile box transformer vehicle and the low-voltage power supply vehicle, the mobile box transformer vehicle is connected with the low-voltage power supply vehicle through a low-voltage output cable, a high-voltage connector is arranged on the mobile box transformer vehicle, the high-voltage connector is connected with a high-voltage lead-in cable, and the high-voltage cable is connected to the 10KV cable through a high-voltage cable coupler;
the low-voltage power supply vehicle provides 0.4 kV-level voltage to the mobile box transformer substation vehicle through a low-voltage output cable, the mobile box transformer substation vehicle boosts the 0.4kV voltage into 10kV, and the voltage is transmitted to the 10kV cable through the high-voltage lead-in cable.
Preferably, the low-pressure joint and the high-pressure joint are arranged below two sides of the mobile box type transformer substation.
Preferably, the mobile box type transformer substation vehicle is provided with four functional areas, namely a cab, an operation monitoring room, a step-up/step-down transformer room and a high-low voltage switch cabinet room; and partition walls are arranged between the step-up/step-down transformer chamber and other equipment rooms in the carriage, and a 0.4KV/10KV step-up/step-down transformer is arranged in the step-up/step-down transformer chamber.
Preferably, the transformer is a three-phase dry-type transformer, and the capacity is 250-1000 kVA.
Preferably, an air exhaust shutter is arranged above the step-up/step-down transformer chamber for ventilation and heat dissipation; the over-temperature alarm and over-temperature tripping device has the over-temperature alarm and over-temperature tripping functions.
Preferably, a 10KV ring main unit and a low-voltage switch cabinet are arranged in the high-low voltage switch cabinet chamber.
Preferably, the 10KV ring main unit adopts an ABB Safe series SF6 gas insulated switchgear, the structure of the switchgear is three units with two inlets and one outlet, the low-voltage switchgear adopts an outlet cabinet unit of an ABB high-sectionalization capacity circuit breaker, an auxiliary contact and a no-voltage protection switch are arranged in the low-voltage switchgear, and an electric operating mechanism is configured.
Preferably, still include the bypass cable car, the bypass cable car has the cable and receive and releases the function.
Preferably, a low-voltage cable connection coupler is arranged on the low-voltage output cable.
Preferably, a cable fixing frame is arranged on the high-voltage leading-in cable, and the cable fixing frame is detachably mounted on the tension rod of the 10KV cable.
According to the invention, the mobile box transformer substation vehicle is additionally arranged between the low-voltage power supply vehicle and the 10KV cable, and the voltage is boosted and reduced through the boosting/reducing transformer in the mobile box transformer substation vehicle, so that the low-voltage power supply vehicle is butted with the medium-voltage power grid. And a ring main unit and a low-voltage switch cabinet are arranged in the mobile box transformer substation, and can be used as a temporary power supply emergency power supply to realize uninterrupted power supply for users.
Drawings
Fig. 1 is a schematic diagram of a low-voltage power supply vehicle of the present invention connected to a medium-voltage power grid.
Fig. 2 is a schematic diagram of the connection between the mobile box-type substation vehicle and a 10KV cable.
Fig. 3 is a schematic view of an interior portion of the mobile box-to-substation vehicle.
In the figure, a 10KV cable 1, a low voltage power supply vehicle 2, a mobile box transformer vehicle 3, a low voltage output cable 4, a high voltage lead-in cable 5, a tension rod 11, a low voltage connector 31, a high voltage connector 32, a cab 33, a step-up/step-down transformer chamber 34, a high and low voltage switch cabinet chamber 35, a transformer 36, an exhaust shutter 37, a 10KV ring main unit 38, a low voltage cable connection coupler 41, a high voltage cable coupler 51, and a cable fixing frame 52.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
Fig. 1 to 3 show a preferred embodiment of the present invention, which includes a 10KV cable 1 and a low-voltage power supply vehicle 2, a mobile box transformer vehicle 3 is disposed between the 10KV cable 1 and the low-voltage power supply vehicle 2, both the mobile box transformer vehicle 3 and the low-voltage power supply vehicle 2 are provided with low-voltage connectors 31, which are connected to the low-voltage power supply vehicle 2 through a low-voltage output cable 4, and the low-voltage output cable 4 is provided with a low-voltage cable connection coupler 41.
The mobile box type transformer substation 3 is provided with a high-voltage connector 32, the high-voltage connector 32 is connected with a high-voltage leading-in cable 5 and is connected to the 10KV cable 1 through a high-voltage cable coupler 51, in order to guarantee the stability of connection, a cable fixing frame 52 is additionally arranged on the high-voltage leading-in cable 5, and the cable fixing frame 52 is detachably arranged on a tension rod 11 of the 10KV cable 1.
When the 10kV cable 1 needs to be powered, the low-voltage power supply vehicle 2 provides 0.4 kV-level voltage to the mobile box transformer substation vehicle 3 through the low-voltage output cable 4, the mobile box transformer substation vehicle 3 boosts the 0.4kV to 10kV, the voltage is transmitted to the 10kV cable 1 through the high-voltage lead-in cable 5, and power supply to the 10kV medium-voltage line is achieved.
For convenience of wiring, in the present embodiment, the low-pressure connector 31 and the high-pressure connector 32 are isolated from the equipment inside the cabin below both sides of the mobile box-type substation 3.
The mobile box type transformer car 3 is modified from a second type chassis and is provided with four functional areas, namely a cab 33, an operation monitoring room (not shown in the figure), an up/down transformer room 34 and a high/low voltage switch cabinet room 35. A partition wall is arranged between the step-up/down transformer chamber 34 and other equipment in the carriage, a 0.4KV/10KV step-up/down transformer 36 is arranged in the step-up/down transformer chamber, the transformer 36 is a three-phase dry type transformer, the capacity is 250-1000 kVA, and the 0.4KV electric energy generated by the low-voltage power supply vehicle 2 can be boosted to 10KV to supply power to the 10KV cable 1, as shown in fig. 1. An air exhaust shutter 37 is arranged above the step-up/step-down transformer chamber 34 for ventilation and heat dissipation. Step-up/step-down transformer 36 has the functions of over-temperature alarm and over-temperature tripping: when the temperature of the transformer reaches the overtemperature alarm set value, the alarm device of the mobile box type transformer substation vehicle 3 can give an alarm; when the temperature of the transformer reaches the over-temperature trip set value, the low-voltage output switch should automatically trip.
The high-low voltage switch cabinet chamber 35 is internally provided with a 10KV ring main unit 38 and a low-voltage switch cabinet (not shown in the figure), and is reserved with enough space for operation and maintenance. The 10KV ring main unit adopts an ABB Safe series SF6 gas insulated switch cabinet, and the structure of the switch cabinet is three units with two inlets and one outlet. The low-voltage switch cabinet adopts an outlet cabinet unit of an ABB high-sectionalization capacity circuit breaker, an auxiliary contact and a voltage loss protection switch are arranged in the outlet cabinet unit, and an electric operating mechanism is configured.
When the distribution transformer fails or is overhauled, the transformer load can be changed by adopting a bypass operation mode, a flexible cable is applied, electricity is taken from a 10KV cable 1 or a ring main unit or a switch cabinet (not shown in the figure), and the flexible cable is used as a temporary power supply emergency power supply to realize uninterrupted power supply for users, as shown in fig. 2.
When the length of the bypass cable of the mobile box type transformer substation 3 is limited, the bypass cable of the bypass cable car can be adopted to extend the cable line. The bypass cable car comprises a chassis, a carriage, a fixed cable winding and unwinding device, a control system and the like, and has a cable winding and unwinding function.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.
Claims (10)
1. A power supply vehicle access medium voltage distribution network uninterrupted operation method is characterized in that: the system comprises a 10KV cable and a low-voltage power supply vehicle, wherein a mobile box transformer substation vehicle is arranged between the 10KV cable and the low-voltage power supply vehicle, low-voltage connectors are arranged on the mobile box transformer substation vehicle and the low-voltage power supply vehicle, the mobile box transformer substation vehicle is connected with the low-voltage power supply vehicle through a low-voltage output cable, a high-voltage connector is arranged on the mobile box transformer substation vehicle, the high-voltage connector is connected with a high-voltage lead-in cable, and the high-voltage lead-in cable is connected with the 10KV cable through a high-voltage cable coupler;
the low-voltage power supply vehicle provides 0.4 kV-level voltage to the mobile box transformer substation vehicle through a low-voltage output cable, the mobile box transformer substation vehicle boosts the 0.4kV voltage into 10kV, and the voltage is transmitted to the 10kV cable through the high-voltage lead-in cable.
2. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 1, characterized in that: the low-pressure joint and the high-pressure joint are arranged below two sides of the movable box type transformer substation vehicle.
3. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 1, characterized in that: the mobile box transformer substation vehicle is provided with four functional areas, namely a cab, an operation monitoring room, a step-up/step-down transformer room and a high-low voltage switch cabinet room; and partition walls are arranged between the step-up/step-down transformer chamber and other equipment rooms in the carriage, and a 0.4KV/10KV step-up/step-down transformer is arranged in the step-up/step-down transformer chamber.
4. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 3, characterized in that: the transformer is a three-phase dry-type transformer, and the capacity of the transformer is 250-1000 kVA.
5. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 3, characterized in that: an air exhaust shutter is arranged above the step-up/step-down transformer chamber for ventilation and heat dissipation; the over-temperature alarm and over-temperature tripping device has the over-temperature alarm and over-temperature tripping functions.
6. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 3, characterized in that: and a 10KV ring main unit and a low-voltage switch cabinet are arranged in the high-low voltage switch cabinet chamber.
7. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 6, characterized in that: the 10KV ring main unit adopts an ABB Safe series SF6 gas insulated switch cabinet, the structure of the switch cabinet is three units with two inlets and one outlet, the low-voltage switch cabinet adopts an outlet cabinet unit of an ABB high-sectionalization capacity circuit breaker, auxiliary contacts and a voltage-loss protection switch are arranged in the outlet cabinet unit, and an electric operating mechanism is configured.
8. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 1, characterized in that: still include the bypass cable car, the bypass cable car has the cable and receive and releases the function.
9. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 1, characterized in that: and a low-voltage cable connection coupler is arranged on the low-voltage output cable.
10. The uninterrupted power operation method for the power supply vehicle to be connected to the medium-voltage distribution network according to claim 1, characterized in that: and a cable fixing frame is arranged on the high-voltage leading-in cable, and the cable fixing frame is detachably arranged on the tension rod of the 10KV cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738892.5A CN113410791A (en) | 2021-06-30 | 2021-06-30 | Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110738892.5A CN113410791A (en) | 2021-06-30 | 2021-06-30 | Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113410791A true CN113410791A (en) | 2021-09-17 |
Family
ID=77680763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110738892.5A Pending CN113410791A (en) | 2021-06-30 | 2021-06-30 | Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113410791A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684087A (en) * | 2012-05-30 | 2012-09-19 | 广州供电局有限公司 | Bypass operation vehicle capable of enabling users to change distribution transformer without power cutting |
| CN104210412A (en) * | 2014-09-19 | 2014-12-17 | 龙岩市海德馨汽车有限公司 | Intelligent power transformation truck |
| CN204258420U (en) * | 2014-12-02 | 2015-04-08 | 国家电网公司 | Moving lifting voltage source car |
| CN206595760U (en) * | 2017-03-08 | 2017-10-27 | 广西电网有限责任公司南宁供电局 | A kind of middle pressure electric car group of emergency power shutoff repairing |
-
2021
- 2021-06-30 CN CN202110738892.5A patent/CN113410791A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684087A (en) * | 2012-05-30 | 2012-09-19 | 广州供电局有限公司 | Bypass operation vehicle capable of enabling users to change distribution transformer without power cutting |
| CN104210412A (en) * | 2014-09-19 | 2014-12-17 | 龙岩市海德馨汽车有限公司 | Intelligent power transformation truck |
| CN204258420U (en) * | 2014-12-02 | 2015-04-08 | 国家电网公司 | Moving lifting voltage source car |
| CN206595760U (en) * | 2017-03-08 | 2017-10-27 | 广西电网有限责任公司南宁供电局 | A kind of middle pressure electric car group of emergency power shutoff repairing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112864817A (en) | Power distribution device, power distribution trailer, electric drive system and method for operating an electric drive system | |
| CN104377585A (en) | Modular intelligent box type fixed inflatable high-voltage AC metal enclosure switching equipment | |
| RU52276U1 (en) | SECTION POINT FOR SWITCHING AND PROTECTION OF ELECTRIC TRANSMISSION AIRLINES | |
| CN103311833A (en) | Small-size intelligent prefabricated substation | |
| CN204216476U (en) | A kind of modularization intelligent box fixes gas-filled type high-voltage alternating metal enclosed switchgear | |
| CN203553686U (en) | Small-size intelligent prefabricated substation | |
| CN219086659U (en) | Gas-insulated switchgear | |
| CN101931180A (en) | Gas insulation metal sealing switch device of double-bus | |
| CN111682404A (en) | 10kV power system neutral point movable small resistor complete grounding device | |
| CN113410791A (en) | Uninterrupted power operation method for power supply vehicle connected to medium-voltage power distribution network | |
| CN207518086U (en) | A kind of knockdown change power distribution equipment | |
| CN212849578U (en) | Movable high-pressure chamber | |
| CN214899349U (en) | Distribution device, distribution trailer and electric drive system | |
| CN103840380A (en) | PT2 type power distribution station | |
| CN208489574U (en) | A kind of low-voltage comprehensive distribution box with emergency power supply plug | |
| CN114883966A (en) | Integrated medium-voltage cabinet and vertical box transformer substation | |
| CN202434942U (en) | Mining flame-proof and pressurized high-voltage power distribution device | |
| CN112152132B (en) | Movable high-pressure chamber | |
| CN217281685U (en) | 50MW 110kV new forms of energy booster station system | |
| CN221226884U (en) | Grid-connected contactor cabinet | |
| CN215185450U (en) | Energy storage container | |
| CN215528423U (en) | Movable transformer substation | |
| CN110364956B (en) | High-voltage switch device | |
| CN216564158U (en) | Mobile box transformer substation vehicle used under nuclear power SBO working condition | |
| CN202872226U (en) | Compact box-type substation for wind power plant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |