CN114374264A - Uninterrupted replacement method for feed screen feed unit plug frame of direct-current system - Google Patents
Uninterrupted replacement method for feed screen feed unit plug frame of direct-current system Download PDFInfo
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- CN114374264A CN114374264A CN202111508351.XA CN202111508351A CN114374264A CN 114374264 A CN114374264 A CN 114374264A CN 202111508351 A CN202111508351 A CN 202111508351A CN 114374264 A CN114374264 A CN 114374264A
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- terminal
- feed unit
- current system
- feed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- 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
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
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- 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
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- 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
- H02B1/24—Circuit arrangements for boards or switchyards
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
A method for replacing a feed screen feed unit plug frame of a direct current system without power outage comprises the following steps of firstly, connecting an emergency power supply; secondly, using a bridge connection quick short circuit for the positive electrode and the negative electrode; thirdly, disassembling the insertion frame of the feed unit and connecting and mechanically connecting the direct current system; and step four, installing a new power feeding unit inserting frame. Through adopting the terminal row that can bridge to insert the frame with the feed unit and be connected, the combination of reserve terminal and bridging piece for the feed unit inserts the frame and uses external power source to supply power to the load when changing, and reaches the load end through bridging terminal and does not have a power failure, makes whole operation process operating personnel be the operation of not electrified through emergency power source circuit breaker, bridging piece and pulling out the terminal of inserting, and factor of safety improves greatly.
Description
Technical Field
The invention relates to the technical field of maintenance of a direct-current system of a transformer substation, in particular to a method for replacing a feed screen feed unit plug frame of a direct-current system without power outage.
Background
The direct current system usually provides power for monitoring and action parts such as signal equipment, protection, automatic devices and the like, and the normal production stable operation of the direct current system is important to the load of the power provided by the direct current system, therefore, when the direct current system is designed, two direct current buses are usually adopted for power supply (charging screens), the direct current bus power supply is connected through a bus tie switch (contact screen), one set of direct current bus power supply fails, the load can be connected with the other set of direct current bus by the bus tie switch to realize continuous power supply, the problem of power supply stability is well solved in the form, but power facilities need to be regularly checked, maintained and maintained, because the direct current buses are continuously electrified, the maintenance risk of the corresponding charging screens and the feeding screens is large, and therefore power failure is often needed to be maintained, and the loss of the load end of the power transformation system is large.
The feed unit plug-in frame is the unit with direct current load direct connection in the feed screen, be the feed screen of certain direct current system in fig. 11, wherein KK101-KK11110, KK111-KK120, KK121-KK130, KK1131-KK140 are the circuit breaker of being connected with the load on the 4 feed unit plug-in frames, feed unit plug-in frame and busbar are connected through the terminal disc, need change feed unit plug-in frame when maintaining direct current system, then need demolish power and line earlier, change the plug-in frame, load outage in this process, and direct current system's load is the equipment in the transformer substation, consequently more change will lead to the transformer substation to suspend the operation, it is huge to change the cost.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for replacing the insertion frame of the feed unit of the feed screen of the direct-current system without power outage, which can safely replace the insertion frame of the feed unit under the condition that the direct-current system does not have power outage.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for replacing a feed screen feed unit plug frame of a direct current system without power outage comprises the following steps that a power supply and a load are connected with the feed unit plug frame through a terminal strip, the terminal strip adopts a terminal strip capable of being bridged, a feed bus is arranged in the feed unit plug frame, power buses KM1+, KM1 are connected with the feed bus through the terminal strip, a plurality of single-phase load circuit breaker input ends in the feed unit plug frame are electrically connected with the feed bus, the single-phase load circuit breaker output ends are electrically connected with the terminal strip, the single-phase load circuit breaker output ends are arranged on the terminal strip in a positive electrode and a negative electrode in a segmented mode, at least one standby terminal is arranged at the tail end of the arrangement of the positive electrode and the negative electrode, and the method for replacing the feed unit plug frame without power outage comprises the following steps:
step one, wiring the spare terminals of the anode and the cathode on the terminal strip to maintenance emergency terminals FD1+ and FD1-, and connecting emergency power supplies at FD1+ and FD 1-;
step two, two bridging blocks are used for respectively arranging and bridging the positive standby terminal and each positive terminal on the terminal strip, and the negative standby terminal and each negative terminal on the terminal strip are arranged and bridged;
disconnecting the connection of the terminal strip and each single-phase load circuit breaker, disconnecting the connection of the terminal strip and the feed busbar, disconnecting the electrical connection of the original feed unit plug frame and the direct-current system, disassembling the mechanical connection of the original feed unit plug frame and the direct-current system, and extracting the original feed unit plug frame;
fourthly, mounting the feed unit insertion frame to be replaced to the position of the removed original feed unit insertion frame, and restoring the connection between each single-phase load circuit breaker and the feed bus bar and the terminal bar according to the original wiring mode;
and step five, detaching the two bridging blocks installed in the step two, and disconnecting the standby terminals of the positive electrode and the negative electrode on the terminal block in the step one from the maintenance emergency terminals FD1+ and FD 1-.
In a preferred embodiment, the maintenance emergency terminals FD1+ and FD1 "in the first step are electrically connected to the emergency power switch 11FQ, when the positive and negative backup terminals are connected to the maintenance emergency terminals FD1+ and FD 1", the emergency power switch 11FQ is turned off, and before the terminal strip is removed in the third step and connected to the original power feeding unit insertion frame, the emergency power switch 11FQ is turned on.
In a preferable scheme, the emergency power switch 11FQ adopts a discharging switch of a direct-current system 1# storage battery module BAT 1, the direct-current system is a two-charging multi-feed direct-current system, the 1# storage battery module BAT 1 is connected with the 1# charging screen CHC1 through a storage battery bus 1BAT +, 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct-current bus KM1+, KM1-, the 2# charging screen CHC2 is provided with a power supply direct-current bus KM2+, KM2-, and the 1# charging screen CHC1 is connected with the 2# charging screen CHC2 through an interconnection switch.
In a preferred scheme, in the first step, the spare terminals of the positive electrode and the negative electrode and the maintenance emergency terminals FD1+ and FD 1-are connected by adopting a pull-plug type terminal X1.
In a preferred embodiment, one end of the plug-in terminal X1 is connected to the emergency power switch 11FQ, the emergency power switch 11FQ is connected to the discharge module using the plug-in terminal X1 when the battery discharge switch is in use, and the other end of the plug-in terminal X1 is connected to the spare terminals of the positive and negative electrodes, and is used as a spare terminal at ordinary times, and is connected to the plug-in terminal at the other end when the feeding unit insertion frame needs to be replaced.
In the preferred scheme, the upper end of the bridging block is made of insulating plastic, short connection pieces are wrapped in the insulating plastic, the short connection pieces stretch out of the insulating plastic at intervals to form short connection plugs, and the insulating plastic is held by hands to insert the short connection plugs into bridging holes in the terminal row during bridging.
According to the uninterrupted replacement method for the feed unit plug frame of the feed screen of the direct-current system, the terminal row capable of being bridged is connected with the feed unit plug frame, and the standby terminal and the bridging block are combined, so that the feed unit plug frame uses an external power supply to supply power to a load when being replaced, the load end is uninterrupted through the bridging terminal, operators are in uncharged operation in the whole operation process through the emergency power supply breaker, the bridging block and the plug terminal, and the safety coefficient is greatly improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic connection diagram of a power feeding unit insertion frame according to the present invention;
FIG. 2 is a schematic wiring diagram of step one of the method;
FIG. 3 is a schematic diagram of the bridge in step two of the method;
FIG. 4 is a schematic illustration of the method in step three taken out of the way;
FIG. 5 is a schematic diagram of a preferred embodiment of a step-by-step emergency power switch 11 FQ;
fig. 6 is a schematic diagram of a second step of the preferred embodiment with an emergency power switch 11 FQ;
FIG. 7 is a schematic structural diagram of a bridge block in a preferred embodiment;
FIG. 8 is a schematic diagram of the DC system in a preferred embodiment;
fig. 9 is a schematic view of a preferred embodiment of a strip-and-plug terminal X1;
fig. 10 is a schematic structural view of a pluggable terminal X1;
fig. 11 is a layout diagram of the feeding panel.
Wherein: the power supply unit comprises a power supply unit inserting frame 1, a power supply bus bar 2, a single-phase load circuit breaker 3, a terminal bar 4, a bridging block 5, insulating plastic 51 and a short-circuit plug 52.
Detailed Description
As shown in fig. 1-4, a method for replacing a feeding unit insertion frame of a direct current system feeding panel without power outage, where a power supply and a load are connected to a feeding unit insertion frame 1 through a terminal strip 4, the terminal strip 4 employs a terminal strip that can be bridged, a feeding bus 2 is disposed in the feeding unit insertion frame 1, power buses KM1+, KM 1-are connected to the feeding bus 2 through the terminal strip 4, a plurality of single-phase load circuit breakers 3 input ends in the feeding unit insertion frame 1 are electrically connected to the feeding bus 2, single-phase load circuit breakers 3 output ends are electrically connected to the terminal strip 4, and single-phase load circuit breakers 3 output ends are arranged in the terminal strip 4 in segments of positive and negative poles, at least one spare terminal is disposed at an arrangement end of the positive and negative poles, and the method for replacing the feeding unit insertion frame 1 without power outage is as follows:
step one, wiring the spare terminals of the anode and the cathode on the terminal block 4 to maintenance emergency terminals FD1+ and FD1-, and connecting emergency power supplies at positions FD1+ and FD 1-;
step two, two bridging blocks 5 are used for respectively arranging and bridging the positive electrode standby terminal and each positive electrode terminal on the terminal strip 4, the negative electrode standby terminal and each negative electrode terminal on the terminal strip 4, and the emergency power supply can supply power to a load after bridging, so that the connection between the feed unit insertion frame 1 and the terminal strip 4 can be disconnected;
thirdly, disconnecting the connection of the terminal strip 4 and each single-phase load circuit breaker 3, disconnecting the connection of the terminal strip 4 and the feed busbar 2, disconnecting the electrical connection of the original feed unit plug frame 1 and the direct-current system, disassembling the mechanical connection of the original feed unit plug frame 1 and the direct-current system, and extracting the original feed unit plug frame 1;
fourthly, mounting the feed unit insertion frame 1 to be replaced to the position of the removed original feed unit insertion frame 1, and restoring the connection of each single-phase load circuit breaker 3, the feed bus bar 2 and the terminal bar 4 according to the original wiring mode;
step five, two bridging blocks 5 installed in the step two are disassembled, and the connection between the standby terminals of the anode and the cathode on the terminal block 4 in the step one and the maintenance emergency terminals FD1+ and FD 1-is disconnected;
by the operation, through the connection of the emergency power supply and the standby terminal and the bridging between the positive terminal and the negative terminal, the load power supply is firstly converted into the emergency power supply by the feed unit plug frame 1, then the wiring between the terminal strip and the feed unit plug frame is removed for replacement, the load is not cut off in the whole process, and the transformer substation cannot stop working.
Preferably, as shown in fig. 5 and 6, in the first step, the maintenance emergency terminals FD1+ and FD 1-are electrically connected to the emergency power switch 11FQ, when the standby terminals of the positive electrode and the negative electrode are connected to the maintenance emergency terminals FD1+ and FD1-, the emergency power switch 11FQ is disconnected, before the terminal strip 4 is removed in the third step and connected to the original power feeding unit insertion frame 1, the emergency power switch 11FQ is switched on, and the disconnection of the emergency power switch 11FQ can realize the non-charging operation of the connection wire, thereby ensuring the safety of the operator.
The preferred scheme is as shown in fig. 8, the emergency power switch 11FQ adopts a discharge switch of a direct current system 1# storage battery module BAT 1, the direct current system is a two-charging multi-feed direct current system, the 1# storage battery module BAT 1 is connected with a 1# charging screen CHC1 through a storage battery bus 1BAT +, 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct current bus KM1+, KM1-, and the 2# charging screen CHC2 is provided with a power supply direct current bus KM2+, KM2-, and the 1# charging screen CHC1 is connected with the 2# charging screen CHC2 through a contact switch.
Emergency power switch 11FQ adopts the discharge switch of direct current system 1# battery module bat 1, can fully guarantee the safety of power when changing, one of them is because battery discharge switch discharge current is greater than the whole load current of feed unit, can not lead to the accident because circuit breaker electric current break-make ability is not enough, its two discharge switch department powers are the safest power among the whole direct current system, there are battery power and 1# direct current system bus power supply, when 1# direct current system fault outage, still can put through 2# direct current system by the contact switch, supply power by 2# direct current system, there is sufficient safety guarantee.
In the preferred embodiment shown in fig. 9 and 10, the spare terminals of the positive and negative electrodes and the maintenance emergency terminals FD1+ and FD 1-are connected by using a pull-plug terminal X1 in the first step.
Preferably, as shown in fig. 9, one end of the plug-in terminal X1 is connected to the emergency power switch 11FQ, the emergency power switch 11FQ is connected to the discharging module by using the plug-in terminal X1 when the battery discharging switch is in use, and the other end of the plug-in terminal X1 is connected to the spare terminals of the positive and negative electrodes, and is used as a spare terminal at ordinary times, and is connected to the plug-in terminal at the other end when the feeding unit plug frame 1 needs to be replaced.
Adopt pull out and insert formula terminal X1, can be connected the terminal with anodal and negative pole spare terminal in advance, one end is connected with emergency power source switch 11FQ promptly battery discharge switch in advance in addition, battery switch can normally use at ordinary times, pull out and insert formula terminal X1 be connected with terminal row 4 at ordinary times uncharged, when the feed unit that needs to be changed inserts frame 1, insert terminal X1 both ends together, bridging block 5 is with positive negative pole short circuit on the terminal, can dismantle the feed unit and insert the line of frame 1 and terminal row 4, convenient and fast.
The preferred scheme is as shown in fig. 7, the upper end of the bridging block 5 is made of insulating plastic 51, short connection pieces are wrapped in the insulating plastic 51, the short connection pieces extend out of the insulating plastic 51 at intervals to form short connection plugs 52, the insulating plastic 51 is held by hands during bridging, the short connection plugs 52 are inserted into bridging holes in the terminal block 4, and the operation is a plugging operation, so that the operation is convenient, fast and safe.
Claims (6)
1. The uninterrupted replacement method for the feed unit plug frame of the feed screen of the direct current system is characterized in that a power supply and a load are connected with the feed unit plug frame (1) through a terminal strip (4), the terminal strip (4) adopts a terminal strip which can be bridged, a feed bus bar (2) is arranged in the feed unit plug frame (1), power supply buses KM1+ and KM 1-are connected with the feed bus bar (2) through the terminal strip (4), the input ends of a plurality of single-phase load circuit breakers (3) in the feed unit plug frame (1) are electrically connected with the feed bus bar (2), the output ends of the single-phase load circuit breakers (3) are electrically connected with the terminal strip (4), and the output end of the single-phase load circuit breaker (3) is arranged at the terminal strip (4) according to the positive pole and the negative pole in a segmented manner, at least one spare terminal is arranged at the tail end of the arrangement of the positive pole and the negative pole, and the method for replacing the feed unit plug frame (1) without power failure comprises the following steps:
step one, wiring the spare terminals of the anode and the cathode on the terminal block (4) to maintenance emergency terminals FD1+ and FD1-, and connecting emergency power supplies at FD1+ and FD 1-;
step two, two bridging blocks (5) are used for respectively arranging and bridging the positive standby terminal and each positive terminal on the terminal row (4), and the negative standby terminal and each negative terminal on the terminal row (4) are arranged and bridged;
thirdly, disconnecting the connection of the terminal strip (4) and each single-phase load circuit breaker (3), disconnecting the connection of the terminal strip (4) and the feed busbar (2), disconnecting the electrical connection of the original feed unit insertion frame (1) and the direct current system, disassembling the mechanical connection of the original feed unit insertion frame (1) and the direct current system, and drawing out the original feed unit insertion frame (1);
fourthly, mounting the feed unit insertion frame (1) to be replaced to the position of the removed original feed unit insertion frame (1), and restoring the connection between each single-phase load circuit breaker (3) and the feed busbar (2) and the terminal strip (4) according to the original wiring mode;
and step five, detaching the two bridging blocks (5) installed in the step two, and disconnecting the standby terminals of the positive electrode and the negative electrode on the terminal block (4) in the step one from the maintenance emergency terminals FD1+ and FD 1-.
2. The uninterrupted replacement method for the insertion frame of the feeding unit of the direct current system feeding panel as claimed in claim 1, wherein in the first step, the maintenance emergency terminals FD1+ and FD 1-are electrically connected with the emergency power switch 11FQ, when the spare terminals of the positive electrode and the negative electrode are connected with the maintenance emergency terminals FD1+ and FD1-, the emergency power switch 11FQ is disconnected, and before the connection of the terminal row (4) and the insertion frame (1) of the original feeding unit is removed in the third step, the emergency power switch 11FQ is switched on.
3. The uninterrupted replacement method for the insertion frame of the feeding screen feeding unit of the direct-current system as claimed in claim 2, wherein the emergency power switch 11FQ adopts a discharging switch of a direct-current system 1# storage battery module BATC1, the direct-current system is a two-charging multi-feeding direct-current system, the 1# storage battery module BATC1 is connected with a 1# charging screen CHC1 through a storage battery bus 1BAT +, 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct-current bus KM1+, KM1-, the 2# charging screen CHC2 is provided with a power supply direct-current bus KM2+, KM2-, and the 1# charging screen CHC1 is connected with the 2# charging screen CHC2 through a communication switch.
4. The method for replacing the plug frame of the feeding unit of the direct-current system feeding panel according to claim 3, wherein in the first step, the spare terminals of the positive pole and the negative pole and the maintenance emergency terminals FD1+ and FD 1-are connected by using a plug-in terminal X1.
5. The uninterrupted replacement method for the feed unit plug frame of the direct current system feed panel according to claim 3, wherein one end of the plug-in terminal X1 is connected with an emergency power switch 11FQ, the emergency power switch 11FQ is connected with a discharge module by using a plug-in terminal X1 when a battery discharge switch is used, and the other end of the plug-in terminal X1 is connected with a spare terminal of a positive electrode and a negative electrode, and is used as a spare terminal at ordinary times and is connected with the plug-in terminal at the other end when the feed unit plug frame (1) needs to be replaced.
6. The uninterrupted replacement method for the insertion frame of the feed unit of the direct-current system feed screen according to claim 1, wherein the upper end of the bridging block (5) is made of insulating plastic (51), short connection pieces are wrapped in the insulating plastic (51), the short connection pieces extend out of the insulating plastic (51) at intervals to form short connection plugs (52), and the insulating plastic (51) is held by hand to insert the short connection plugs (52) into bridging holes in the terminal row (4) during bridging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508351.XA CN114374264B (en) | 2021-12-10 | 2021-12-10 | Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen |
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| CN202111508351.XA CN114374264B (en) | 2021-12-10 | 2021-12-10 | Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen |
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| CN114374264B CN114374264B (en) | 2023-08-08 |
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| CN114374264B (en) | 2023-08-08 |
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