CN114142356A - Direct current system switching cabinet - Google Patents

Direct current system switching cabinet Download PDF

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Publication number
CN114142356A
CN114142356A CN202111201443.3A CN202111201443A CN114142356A CN 114142356 A CN114142356 A CN 114142356A CN 202111201443 A CN202111201443 A CN 202111201443A CN 114142356 A CN114142356 A CN 114142356A
Authority
CN
China
Prior art keywords
direct current
power supply
breaker
alternating current
positive
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
Application number
CN202111201443.3A
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Chinese (zh)
Inventor
边光瀛
陈东然
吴佳阳
范秀菊
王璇
赵一鸣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Jinghai Power Supply Co of State Grid Tianjin Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Jinghai Power Supply Co of State Grid Tianjin Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Jinghai Power Supply Co of State Grid Tianjin Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202111201443.3A priority Critical patent/CN114142356A/en
Publication of CN114142356A publication Critical patent/CN114142356A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/30Cabinet-type casings; Parts thereof or accessories therefor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/30Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/32Mounting of devices therein
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/52Mobile units, e.g. for work sites
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/54Anti-seismic devices or installations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention relates to a direct current system switching cabinet, which is characterized in that: the power supply circuit comprises a power supply part, a power utilization part and a direct current insulation monitoring part, wherein the power supply part is used for outputting direct current, the power utilization part converts the input direct current into a power supply used by a user, and the direct current insulation monitoring part is used for monitoring the insulation condition of the output direct current. This direct current system switching cabinet combines the actual conditions of team and team's production, will provide safe and stable direct current power supply, improves direct current system transformation efficiency, shortens transformation project time limit for a project as the target. The box body for installing the power circuit is installed on the moving trolley, so that the power circuit is convenient to move and use.

Description

Direct current system switching cabinet
Technical Field
The invention belongs to the field of operation maintenance service of an electric power direct current system, relates to a switch cabinet, and particularly relates to a direct current system switch cabinet.
Background
With the development of social economy, the requirements of people on safe power supply are higher and higher, and the guarantee of the power supply reliability becomes a basic condition for establishing a 'strong three excellences' modern enterprise by a national power grid company. And the scale of the power grid is continuously enlarged, and the number of transformer substations and power equipment is continuously increased, so that the maintenance task is increasingly heavy, and how to effectively improve the production efficiency becomes a problem to be solved urgently by the basic department.
In the process of transforming the direct current system, the time for overlapping, using and dismantling the temporary power supply accounts for more than 70% of the project period, and if the time consumption in the aspects can be reduced, the project period can be greatly shortened, so that the aim of improving the working efficiency is fulfilled.
The direct current system transformation will appear 2-5 times of unequal potential safety hazards each time, which not only greatly affects the stable operation of the substation equipment, but also threatens the personal safety and fails to meet the related requirements of safety production. According to the conditions reflected by the members in the work class, the potential safety hazards appear in the overlapping and the use of the temporary power supply, so that the reliability of the temporary power supply determines the quality of engineering.
Therefore, a safe and convenient novel temporary power supply is urgently needed to solve the problems of low efficiency, multiple potential safety hazards and disordered field management of direct-current system reconstruction engineering.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the direct current system switching cabinet which can improve the efficiency of direct current system transformation engineering, shorten the construction period, reduce potential safety hazards, facilitate field management and is easy to realize.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the utility model provides a direct current system switching cabinet which characterized in that: the power supply circuit comprises a power supply part, a power utilization part and a direct current insulation monitoring part, wherein the power supply part is used for outputting direct current, the power utilization part converts the input direct current into a power supply used by a user, and the direct current insulation monitoring part is used for monitoring the insulation condition of the output direct current.
The power circuit comprises a high-frequency switch power supply, a storage battery, a circuit breaker QF1, a first circuit breaker QF2, a second circuit breaker QF2, a diode V1, a diode V2, a negative input line-M of alternating current and a positive input line + M of the alternating current; the 380V three-phase power supply is connected with a high-frequency switching power supply through a breaker QF1, the positive output of the high-frequency switching power supply is connected with the positive electrode of a diode V1, the negative electrode of a diode V1 is respectively connected with one end of a first breaker QF2 and the positive electrode of a diode V2, the other end of the first breaker QF2 is connected with the positive electrode of a storage battery, the negative electrode of the storage battery is connected with one end of a first breaker QF2, the other end of the first breaker QF2 is respectively connected with the negative output of the high-frequency switching power supply and a negative input line-M of alternating current, and the negative electrode of the diode V2 is connected with a positive input line + M of the alternating current;
the power utilization part comprises a circuit breaker 1QFn and a lamp 1 HLn; one end of the circuit breaker 1QFn is connected with the lamp 1HLn in parallel, and the other end is connected with the positive and negative input wires of the alternating current in parallel, wherein n is 1 … … 20;
the direct current insulation monitoring part comprises an insulation monitor, a fuse FU1, a fuse FU2, a switch ZJJ and a buzzer FM; the insulation monitor is grounded, one end of the insulation monitor is connected with the fuse FU1 and the positive input line + M of the alternating current in series, one end of the insulation monitor is connected with the fuse FU2 and the positive input line + M of the alternating current in series, and the switch ZJJ is connected with the buzzer FM in series and then connected with two ends of the insulation monitor in parallel.
And, travelling car include vehicle bottom board, wheel and push away the handle universal pivoted wheel is installed to the bottom four corners department of vehicle bottom board, installs the handle that pushes away that extends to the back top in upper end one side of vehicle bottom board, has a plurality of first mounting holes at the equal interval equipartition of four corners department of vehicle bottom board the both sides front and back end of box leans on the lower position all to be provided with the second mounting hole of one row of interval equipartition, still includes an angle bar connecting piece, all is provided with one row of connecting hole on two right-angle faces of this angle bar connecting piece, and connecting hole on the vertical right-angle face passes through the cooperation of screw and nut to be connected on the box, and connecting hole on the horizontal right-angle face passes through the cooperation of screw and nut to be connected on the vehicle bottom board.
And a rubber non-slip mat is arranged on the bottom surface of the box body.
The invention has the advantages and positive effects that:
1. this direct current system switching cabinet combines the actual conditions of team and team's production, will provide safe and stable direct current power supply, improves direct current system transformation efficiency, shortens transformation project time limit for a project as the target. The box body for installing the power circuit is installed on the moving trolley, so that the power circuit is convenient to move and use.
2. This direct current system switching cabinet through being split type structure with travelling car and box design, the normal clear of construction is guaranteed in the maintenance when convenient each part breaks down.
3. This direct current system switching cabinet sets up the rubber slipmat through the bottom surface at the box, and this slipmat can increase its and travelling car's frictional force on the one hand, increases its stability of installing on the travelling car, and on the other hand can play absorbing effect, the reliability of protection power supply circuit work.
4. The direct current system switching cabinet has the advantages of being scientific and reasonable in design, capable of improving the efficiency of direct current system transformation engineering, shortening the construction period, reducing potential safety hazards, convenient to manage on site and easy to achieve, and is high in innovation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a circuit diagram of a power circuit of the present invention.
Description of the reference numerals
1-moving trolley, 2-box body, 3-pushing handle, 4-angle iron connecting piece, 5-vehicle bottom plate and 6-wheel.
Detailed Description
The embodiments of the invention are described in further detail below with reference to the following figures:
a direct current system switching cabinet is innovative in that: the power supply device comprises a movable trolley 1, a box body 2 and a power supply circuit, wherein the box body is installed on the movable trolley, the power supply circuit is arranged in the box body and comprises a power supply part, a power utilization part and a direct current insulation monitoring part, the power supply part is used for outputting direct current, the power utilization part converts the input direct current into a power supply used by a user, and the direct current insulation monitoring part is used for monitoring the insulation condition of the output direct current.
The power supply circuit comprises a high-frequency switch power supply, a storage battery, a circuit breaker QF1, a first circuit breaker QF2, a second circuit breaker QF2, a diode V1, a diode V2, a negative input line-M of alternating current and a positive input line + M of the alternating current; the 380V three-phase power supply is connected with a high-frequency switching power supply through a breaker QF1, the positive output of the high-frequency switching power supply is connected with the positive electrode of a diode V1, the negative electrode of a diode V1 is respectively connected with one end of a first breaker QF2 and the positive electrode of a diode V2, the other end of the first breaker QF2 is connected with the positive electrode of a storage battery, the negative electrode of the storage battery is connected with one end of a first breaker QF2, the other end of the first breaker QF2 is respectively connected with the negative output of the high-frequency switching power supply and a negative input line-M of alternating current, and the negative electrode of the diode V2 is connected with a positive input line + M of the alternating current;
the power utilization part comprises a circuit breaker 1QFn and a lamp 1 HLn; one end of the circuit breaker 1QFn is connected with the lamp 1HLn in parallel, and the other end is connected with the positive and negative input wires of the alternating current in parallel, wherein n is 1 … … 20;
one end of the breaker 1QF2 is connected with the lamp 1HL2 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF3 is connected with the lamp 1HL3 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF4 is connected with the lamp 1HL4 in parallel, one end of the breaker 1QF5 is connected with the lamp 1HL5 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF6 is connected with the lamp 1HL6 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF7 is connected with the lamp 1HL7 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF8 is connected with the lamp 1HL8 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF9 is connected with the lamp 1HL9 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF10 is connected with the lamp 1HL10 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF11 is connected with the lamp 1HL11 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF12 is connected with the lamp 1HL12 in parallel, one end of the breaker 1QF13 is connected with the lamp 1HL13 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF14 is connected with the lamp 1HL14 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF15 is connected with the lamp 1HL15 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF16 is connected with the lamp 1HL16 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF17 is connected with the lamp 1HL17 in parallel, the other end is connected with the positive and negative input lines of the alternating current in parallel, one end of the breaker 1QF18 is connected with the lamp 1HL18 in parallel, the other end is connected with the positive and negative input wires of the alternating current in parallel, one end of the breaker 1QF19 is connected with the lamp 1HL19 in parallel, the other end is connected with the positive and negative input wires of the alternating current in parallel, one end of the breaker 1QF20 is connected with the lamp 1HL20 in parallel, and the other end is connected with the positive and negative input wires of the alternating current in parallel.
The direct current insulation monitoring part comprises an insulation monitor, a fuse FU1, a fuse FU2, a switch ZJJ and a buzzer FM; the insulation monitor is grounded, one end of the insulation monitor is connected with the fuse FU1 and the positive input line + M of the alternating current in series, one end of the insulation monitor is connected with the fuse FU2 and the positive input line + M of the alternating current in series, and the switch ZJJ is connected with the buzzer FM in series and then connected with two ends of the insulation monitor in parallel.
Travelling car include vehicle bottom board 5, wheel 6 and push away 3 universal pivoted wheel is installed to the bottom four corners department of vehicle bottom board, installs the pushing away handle that extends to the back top in upper end one side of vehicle bottom board, has a plurality of first mounting holes at the equal interval equipartition in the four corners department of vehicle bottom board the both sides front and back end of box leans on the lower position all to be provided with the second mounting hole of one row of interval equipartition, still includes an angle bar connecting piece 4, all is provided with one row of connecting hole on two right angle faces of this angle bar connecting piece, connecting hole on the vertical right angle face passes through the cooperation of screw and nut to be connected on the box, connecting hole on the horizontal right angle face passes through the cooperation of screw and nut to be connected on the vehicle bottom board.
And a rubber non-slip mat is arranged on the bottom surface of the box body. Through setting up the rubber slipmat in the bottom surface of box, this slipmat can increase its and travelling car's frictional force on the one hand, increases its stability of installing on the travelling car, and on the other hand can play absorbing effect, the reliability of protection power supply circuit work.
As shown in fig. 1 and 2, around the goals of portability, portability and strong operability, the invention installs a box body provided with a power supply circuit on a movable trolley:
1. the method has the advantages that the old transformer substations or the expanded transformer substations exist in the jurisdiction range, the space is narrow, the floor area and the volume of the designed direct current system switching cabinet are not too large, and the length, the width and the height are not more than 1 meter;
2. the direct current transformation project has large workload, the designed direct current system switch cabinet is not suitable to be too heavy and has strong mobility, the device is required to be not more than 25kg, and wheels are designed to be convenient to move;
3. the direct current load of some transformer substations is more, requires to distribute the sky to open in the front and back both sides of direct current system switching cabinet so that two shelves of people work simultaneously, improves work efficiency.
As shown in fig. 3, the design of the electrical loop of the dc system switch cabinet is an important link related to the safety and reliability of the device, and the invention sets the following three design requirements on the basis of the dc system principle:
1. the device adopts two paths of power supply of a high-frequency switch power supply and a storage battery, the high-frequency switch power supply is a main power supply, and the storage battery is a standby power supply;
2. a direct current insulation monitoring part is arranged to monitor the ground insulation condition of the whole direct current system;
3. the signal alarm function is designed, and if insulation reduction or direct current power loss occurs, an alarm signal can be sent out in time.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.

Claims (4)

1. The utility model provides a direct current system switching cabinet which characterized in that: the power supply circuit comprises a power supply part, a power utilization part and a direct current insulation monitoring part, wherein the power supply part is used for outputting direct current, the power utilization part converts the input direct current into a power supply used by a user, and the direct current insulation monitoring part is used for monitoring the insulation condition of the output direct current.
2. The direct current system switch cabinet of claim 1, wherein: the power supply circuit comprises a high-frequency switch power supply, a storage battery, a circuit breaker QF1, a first circuit breaker QF2, a second circuit breaker QF2, a diode V1, a diode V2, a negative input line-M of alternating current and a positive input line + M of the alternating current; the 380V three-phase power supply is connected with a high-frequency switching power supply through a breaker QF1, the positive output of the high-frequency switching power supply is connected with the positive electrode of a diode V1, the negative electrode of a diode V1 is respectively connected with one end of a first breaker QF2 and the positive electrode of a diode V2, the other end of the first breaker QF2 is connected with the positive electrode of a storage battery, the negative electrode of the storage battery is connected with one end of a first breaker QF2, the other end of the first breaker QF2 is respectively connected with the negative output of the high-frequency switching power supply and a negative input line-M of alternating current, and the negative electrode of the diode V2 is connected with a positive input line + M of the alternating current;
the power utilization part comprises a circuit breaker 1QFn and a lamp 1 HLn; one end of the circuit breaker 1QFn is connected with the lamp 1HLn in parallel, and the other end is connected with the positive and negative input wires of the alternating current in parallel, wherein n is 1 … … 20;
the direct current insulation monitoring part comprises an insulation monitor, a fuse FU1, a fuse FU2, a switch ZJJ and a buzzer FM; the insulation monitor is grounded, one end of the insulation monitor is connected with the fuse FU1 and the positive input line + M of the alternating current in series, one end of the insulation monitor is connected with the fuse FU2 and the positive input line + M of the alternating current in series, and the switch ZJJ is connected with the buzzer FM in series and then connected with two ends of the insulation monitor in parallel.
3. The direct current system switch cabinet of claim 1, wherein: travelling car include vehicle bottom board, wheel and push away the handle universal pivoted wheel is installed to the bottom four corners department of vehicle bottom board, installs the handle that pushes away that extends to the back top in upper end one side of vehicle bottom board, has a plurality of first mounting holes at the equal interval equipartition in the four corners department of vehicle bottom board the both sides front and back end of box all is provided with the second mounting hole of one row of interval equipartition by lower position, still includes an angle bar connecting piece, all is provided with one row of connecting hole on two right angle faces of this angle bar connecting piece, connecting hole on the vertical right angle face passes through the cooperation of screw and nut to be connected on the box, connecting hole on the horizontal right angle face passes through the cooperation of screw and nut to be connected on the vehicle bottom board.
4. The direct current system switch cabinet of claim 1, wherein: and a rubber non-slip mat is arranged on the bottom surface of the box body.
CN202111201443.3A 2021-10-15 2021-10-15 Direct current system switching cabinet Pending CN114142356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111201443.3A CN114142356A (en) 2021-10-15 2021-10-15 Direct current system switching cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111201443.3A CN114142356A (en) 2021-10-15 2021-10-15 Direct current system switching cabinet

Publications (1)

Publication Number Publication Date
CN114142356A true CN114142356A (en) 2022-03-04

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Application Number Title Priority Date Filing Date
CN202111201443.3A Pending CN114142356A (en) 2021-10-15 2021-10-15 Direct current system switching cabinet

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02280638A (en) * 1989-04-20 1990-11-16 Nippon Telegr & Teleph Corp <Ntt> Dc uninterruptible power supply
CN205178636U (en) * 2015-11-20 2016-04-20 无锡斯达四方电气有限公司 Computer type high frequency switch DC power supply cabinet
CN206250640U (en) * 2016-10-12 2017-06-13 甘肃中电建港航船舶工程有限公司 A kind of movable outdoor electric power cabinet
CN109450080A (en) * 2018-12-29 2019-03-08 烟台东方威思顿电气有限公司 A kind of automatic redundancy zero propagation switching system of two dc power supply and method
CN210350521U (en) * 2019-06-17 2020-04-17 镇江市亚东通用电气有限公司 Machine room low-voltage distribution box moving mechanism
CN212412828U (en) * 2020-07-14 2021-01-26 武汉检安石化工程有限公司 Portable DC power supply emergency device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02280638A (en) * 1989-04-20 1990-11-16 Nippon Telegr & Teleph Corp <Ntt> Dc uninterruptible power supply
CN205178636U (en) * 2015-11-20 2016-04-20 无锡斯达四方电气有限公司 Computer type high frequency switch DC power supply cabinet
CN206250640U (en) * 2016-10-12 2017-06-13 甘肃中电建港航船舶工程有限公司 A kind of movable outdoor electric power cabinet
CN109450080A (en) * 2018-12-29 2019-03-08 烟台东方威思顿电气有限公司 A kind of automatic redundancy zero propagation switching system of two dc power supply and method
CN210350521U (en) * 2019-06-17 2020-04-17 镇江市亚东通用电气有限公司 Machine room low-voltage distribution box moving mechanism
CN212412828U (en) * 2020-07-14 2021-01-26 武汉检安石化工程有限公司 Portable DC power supply emergency device

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