CN115441345A - Misoperation-preventing locking system and method for high-voltage power distribution cabinet of transformer substation - Google Patents
Misoperation-preventing locking system and method for high-voltage power distribution cabinet of transformer substation Download PDFInfo
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- CN115441345A CN115441345A CN202011463321.7A CN202011463321A CN115441345A CN 115441345 A CN115441345 A CN 115441345A CN 202011463321 A CN202011463321 A CN 202011463321A CN 115441345 A CN115441345 A CN 115441345A
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- 238000009826 distribution Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002265 prevention Effects 0.000 claims abstract description 20
- 238000012423 maintenance Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims description 39
- 230000005611 electricity Effects 0.000 claims description 14
- 238000012795 verification Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000003211 malignant effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 7
- 238000002955 isolation Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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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
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/167—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal truck type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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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
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/02—Details
- H02B11/04—Isolating-contacts, e.g. mountings or shieldings
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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
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/12—Switchgear having carriage withdrawable for isolation with isolation by horizontal withdrawal
- H02B11/127—Withdrawal mechanism
- H02B11/133—Withdrawal mechanism with interlock
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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
- H02B11/00—Switchgear having carriage withdrawable for isolation
- H02B11/28—Earthing arrangements
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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
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
- H01H2009/265—Interlocking, locking, or latching mechanisms for interlocking two or more switches with interlocking of more than two switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A transformer substation high-voltage power distribution cabinet misoperation prevention locking system and a method thereof are provided, wherein the transformer substation high-voltage power distribution cabinet comprises a main transformer switch cabinet, a main transformer knife switch cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus-branch knife switch cabinet, a bus voltage transformer cabinet and a line switch cabinet; high-voltage distribution cabinet prevent maloperation locking system include: five-prevention locks with the function of preventing misoperation and locking are respectively arranged on the front cabinet door, the rear cabinet door, the trolley rocking hole and the grounding knife switch of the line switch cabinet; five anti-misoperation locks with an anti-misoperation locking function are respectively arranged at the front cabinet door, the rear cabinet door and the trolley rocking hole of a main transformer switch cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus branch switch cabinet and a bus voltage transformer cabinet; the method comprises the following steps: and (4) an operator issues a bill according to the scheduling command, and after the proposed operation bill is checked by a positive value and a long value without error and is signed, switching operation of switching and line maintenance on the standby line of the high-voltage power distribution cabinet is changed from operation.
Description
Technical Field
The invention relates to a misoperation preventing locking system and method for a high-voltage power distribution cabinet of a transformer substation, and belongs to the field of power equipment tools.
Background
In modern society, electric power plays an important role in national economy, national security and people's daily life, and as important electrical equipment in an electric power system, a high-voltage power distribution cabinet is generally applied to 10-35 kV power transformation equipment for electric energy transmission and protection control, so as to provide high-quality electric energy for users. With the rapid development of the substation automation technology and the increasing requirement on the power supply reliability, the function of the switch cabinet in the substation is more prominent. Therefore, how to ensure the safe and reliable operation of the high-voltage power distribution cabinet in the substation becomes an important task for the operation and maintenance of the power transformation of the power system.
The installation of a misoperation prevention locking device on a high-voltage power distribution cabinet is a fundamental measure for ensuring personal, power grid and equipment safety in power production. According to the regulation of national grid company electric power safety work regulations: the high-voltage power distribution cabinet should install perfect anti-misoperation locking device, and have perfect reliable anti-misoperation locking function, do not have the additional mechanical lock of installing of anti-misoperation locking function. However, at present, some switch cabinets are not provided with perfect anti-misoperation locking devices, and only the anti-misoperation locking function of the switch cabinet is relied on, and even some switch cabinet doors only prevent workers from entering by mistake by using screws for fixing. The proportion of accidents caused by imperfect, unreliable or unauthorized unlocking of the misoperation-preventing locking device of the switch cabinet is up to 60 percent when the misoperation and the personal casualty accidents of the power enterprises in this year are checked.
In order to effectively prevent personal and major equipment accidents caused by misoperation of the high-voltage power distribution cabinet, national grid companies set a series of misoperation prevention management regulations and misoperation prevention device management methods, but in actual production and actual work, misoperation accidents of the switch cabinet still frequently occur.
Disclosure of Invention
The invention aims to overcome the defects of the anti-misoperation locking function of the existing high-voltage power distribution cabinet, and provides the anti-misoperation locking system and method for the high-voltage power distribution cabinet of the transformer substation, which are simple in structure, convenient to use and operate and capable of effectively reducing the probability of occurrence of misoperation accidents caused by the incomplete anti-misoperation locking function of the switch cabinet.
The invention aims to provide a misoperation prevention locking system and a method for a high-voltage power distribution cabinet of a transformer substation,
the anti-misoperation locking method comprises the following steps:
firstly, an operator makes an invoice according to a scheduling command, changes the standby circuit of the high-voltage power distribution cabinet from operation to an operation order for circuit maintenance, and specifically comprises the following procedures:
1) Pulling a switch of a standby line;
2) Checking the off position determined by the line switch to be used;
3) Shaking the line switch trolley to be used from the working position to the testing position, fixing and checking;
4) Taking down a female differential outlet pressing plate LPxx of a line switch to be used and checking;
5) Checking a standby line switch to determine cold standby;
6) Switching a bus differential protection switch QB of the high-voltage power distribution cabinet to a bus differential retreating position;
7) Checking that a BP-2B device interface on a bus differential protection screen of the high-voltage power distribution cabinet displays differential exit and differential locking exit;
8) 4 short-circuit screws are used for short-circuit grounding of the 3SD rheological side of the 648-wire switch bus differential CT terminal of the transformer substation;
9) Dismounting a 648 wire switch bus difference CT terminal 3SD of the transformer substation and connecting into 4 bus difference loop connecting screws;
10 Checking the busbar differential protection non-action and abnormal signals of the high-voltage power distribution cabinet;
11 A bus differential protection switch QB of the high-voltage power distribution cabinet is switched to a bus differential throw position;
12 Checking that a BP-2B device interface on a bus differential protection screen of the high-voltage power distribution cabinet displays differential input and differential locking input;
13 Take down the secondary plug-in of the line switch trolley to be used;
14 Pulling the line switch trolley to be used from the test position to the outside of the cabinet for fixing and checking;
15 The line electricity testing trolley is pushed out to a test position from the line switch cabinet to be used, then is shaken to a working position to be fixed and is checked;
16 Three-phase electricity testing is carried out on a fixed contact at the line side of the line electricity testing trolley, after no voltage is tested, the line electricity testing trolley is shaken from a working position to a testing position, then is pulled out of the cabinet to be fixed, and then is checked;
17 Closing a standby line grounding switch blade and checking;
18 Air switch 3DK2 for switching off the control power supply of the line switch to be used;
after the proposed operation order is checked by a positive value and a long value without error and signed, and after a scheduling and issuing order, switching operation of switching and line maintenance of the standby line of the high-voltage power distribution cabinet can be carried out instead of operation.
Preferably, the method comprises the following steps: before switching operation of the switch cabinet is executed, an operator makes a bill in a graph in a background five-prevention system according to operation steps, and the reasonability of the operation steps is verified;
when the local operation is executed, the computer key is transmitted after the drawing invoicing is finished, the operator executes the operation item by item according to the content of the operation order, and when the operation content violating the anti-misoperation locking logic is executed, the computer key realizes forced locking, and simultaneously sends out alarm and prompt information to guide the operator to correctly execute the operation, thereby achieving the purpose of preventing misoperation;
during remote control operation, an operator sends an allowing signal to the monitoring system through the host computer, remote control locking of the corresponding node is unlocked, and after the operation is completed, the host computer updates the equipment state to the current actual state.
Preferably, the method comprises the following steps: according to the requirement of the anti-misoperation specification of the high-voltage power distribution cabinet, a standby circuit of the high-voltage power distribution cabinet is changed into a switch and a circuit to be overhauled by operation, and the operation ticket needs to pass through one-time operation of five-prevention verification, and the method specifically comprises the following 4 steps:
1) Pulling a switch of a standby line;
2) Shaking the line switch trolley to be used from the working position to the testing position, fixing and checking;
3) Pulling the line switch trolley to be used from the test position to the outside of the cabinet for fixing, and checking;
4) Closing the line grounding knife switch to be used and checking;
in the operation of step 1), the five-prevention system verification can help operators to check the equipment name, and avoid the occurrence of malignant misoperation accidents of mistakenly dividing the operators into other interval switches at the background;
in the step 2), a five-prevention lock is arranged in a trolley rocking hole of a switch cabinet of a standby circuit of the high-voltage power distribution cabinet, so that the condition that a worker mistakenly enters a live interval can be effectively avoided, and the trolley is rocked from a working position to a test position to generate misoperation accidents under the condition that a switch is closed;
in the operation of the step 3), the five-prevention lock is arranged on the front cabinet door of the switch cabinet of the standby circuit of the high-voltage power distribution cabinet, so that the accidents that the front cabinet door of the switch cabinet is opened under the electrified condition or when the switch trolley is not at the test position due to high working pressure and inattention of workers can be effectively avoided;
in the operation of the step 4), the five-prevention lock is installed on the switch cabinet line grounding switch of the standby line of the high-voltage power distribution cabinet, so that the occurrence of serious misoperation accidents such as the fact that a worker closes the grounding switch in an electrified manner or closes the grounding switch when a switch trolley is not at a test position can be effectively avoided.
Compared with the prior art, the invention perfects the anti-misoperation locking function of the high-voltage power distribution cabinet, and has the advantages of greatly reducing the occurrence probability of misoperation accidents, effectively ensuring the operation, the work safety of maintainers, the safety and the reliability of power grid equipment and the like.
Detailed Description
The invention relates to a misoperation prevention locking system and method for a high-voltage power distribution cabinet of a transformer substation, wherein the high-voltage power distribution cabinet of the transformer substation comprises a main transformer switch cabinet, a main transformer switch blade cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus branch switch blade cabinet, a bus voltage transformer cabinet and a line switch cabinet; high-voltage distribution cabinet prevent maloperation locking system include: five anti-misoperation locks with anti-misoperation locking functions are respectively arranged on the front cabinet door, the rear cabinet door, the trolley rocking hole and the grounding knife switch of the circuit switch cabinet; five-prevention locks with the function of preventing misoperation and locking are respectively arranged at the positions of a front cabinet door, a rear cabinet door and a trolley rocking hole of a main transformer switch cabinet, a main transformer switch blade cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a main transformer switch blade cabinet and a bus transformer switch cabinet.
The high-voltage power distribution cabinet comprises a 10kV switch cabinet, a 20kV switch cabinet and a 35kV switch cabinet: the five-prevention lock of the high-voltage power distribution cabinet can be realized: (1) The switch has the functions of preventing mistaken separation and switch closing, (2) preventing the on-load pulling and switch closing, 3) preventing the electrified ground wire (grounding switch) from being hung (closed), (4) preventing the on-switch (isolating switch) with the grounding wire (grounding switch) from being closed, and (5) preventing the mistaken entering of the electrified interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps of additionally arranging five anti-lock locks with misoperation prevention functions on a front cabinet door, a trolley rocking hole, a circuit grounding knife switch, a rear upper cabinet door and a rear lower cabinet door of a 35kV circuit switch cabinet; the five-prevention lock comprises the following anti-misoperation functions: (1) preventing the switch from being mistakenly opened and closed; (2) preventing the isolation switch from being pulled and closed under load; (3) preventing the electrification of the earthing knife-switch; (4) preventing the disconnecting link with the grounding switch from closing the isolating switch; and (5) preventing the false entering of the charged interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps that five anti-locking locks with misoperation prevention functions are additionally arranged on a front cabinet door, a trolley rocking hole, a rear upper cabinet door and a rear lower cabinet door of a 35kV main transformer switch cabinet, a main transformer knife switch cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus branch knife switch cabinet and a bus voltage transformer cabinet; the five-prevention lock comprises the following anti-misoperation functions: (1) preventing the switch from being switched on and off by mistake; (2) preventing the isolation switch from being pulled and closed under load; 3) Preventing the charged hanging (closing) of a grounding wire (grounding knife switch); (4) Prevent the switch (isolating switch) with the grounding wire (earthing switch); and (5) preventing the false entering of the charging interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps of additionally arranging five prevention locks with misoperation prevention locking functions on a front middle cabinet door, a front lower cabinet door, a trolley rocking hole, a line grounding knife switch, a rear upper cabinet door and a rear lower cabinet door of a 20kV line switch cabinet; the corresponding anti-misoperation locking function of the five-prevention lock is as follows: (1) preventing the switch from being switched on and off by mistake; (2) preventing the isolation switch from being pulled and closed under load; (3) preventing the earthing knife-switch from being closed with electricity; (4) preventing the disconnecting switch with the grounding switch from closing the isolating switch; and (5) preventing the false entering of the charged interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps that five anti-locking locks with misoperation prevention functions are additionally arranged on a front middle cabinet door, a front lower cabinet door, a trolley rocking hole, a rear upper cabinet door and a rear lower cabinet door of a 20kV main transformer switch cabinet, a main transformer knife switch cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus branch knife switch cabinet and a bus voltage transformer cabinet; the five-prevention lock comprises the following anti-misoperation functions: (1) preventing the switch from being switched on and off by mistake; (2) preventing the isolation switch from being pulled and closed under load; 3) Preventing the charged hanging (closing) of a grounding wire (grounding knife switch); (4) The switch (isolating switch) with the grounding wire (grounding switch) is prevented from being switched on; and (5) preventing the false entering of the charged interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps of additionally arranging five anti-locking locks with misoperation prevention functions on a front cabinet door, a trolley rocking hole, a line grounding knife switch, a rear upper cabinet door and a rear lower cabinet door of a 10kV line switch cabinet; the five-prevention lock comprises the following anti-misoperation functions: (1) preventing the switch from being switched on and off by mistake; (2) preventing the isolation switch from being pulled and closed under load; (3) preventing the earthing knife-switch from being closed with electricity; (4) preventing the disconnecting switch with the grounding switch from closing the isolating switch; and (5) preventing the false entering of the charged interval.
The invention relates to a misoperation prevention locking method for a high-voltage power distribution cabinet of a transformer substation, which comprises the steps of additionally arranging five anti-locking locks with misoperation prevention functions on a front cabinet door, a trolley rocking hole, a rear upper cabinet door and a rear lower cabinet door of a 10kV main transformer switch cabinet, a main transformer switch blade cabinet, a capacitor switch cabinet, a grounding transformer switch cabinet, a bus branch switch blade cabinet and a bus voltage transformer cabinet; the five-prevention lock comprises the following anti-misoperation functions: (1) preventing the switch from being mistakenly opened and closed; (2) preventing the isolation switch from being pulled and closed under load; 3) Preventing the charged hanging (closing) of a grounding wire (grounding knife switch); (4) The switch (isolating switch) with the grounding wire (grounding switch) is prevented from being switched on; and (5) preventing the false entering of the charged interval.
Example (b):
according to the actual production needs, a 35kV standby 750 line of a certain substation is changed into a switch and line maintenance from operation according to the scheduling requirements. The method of the invention is adopted to change the operation of the 35kV standby 750 line into the switch and line maintenance under the condition that the five-prevention lock is additionally arranged on the switch cabinet.
A35 kV standby 750 switch cabinet additionally provided with five-prevention locks comprises a front cabinet door, a trolley rocking hole, a standby 750 line grounding knife switch, a rear upper cabinet door and a rear lower cabinet door of the 35kV standby 750 switch cabinet, wherein the five-prevention locks with anti-misoperation functions are additionally arranged on the front cabinet door, the trolley rocking hole, the standby 750 line grounding knife switch, the rear upper cabinet door and the rear lower cabinet door.
Firstly, an operator makes a bill according to a scheduling command, and an operation bill for changing the operation of a 35kV standby 750 line into line maintenance is as follows:
1) Pulling a standby 750-wire switch;
2) Checking that the standby 750-wire switch is indeed in the off position;
3) Shaking the trolley with the 750 wire switch to be used from the working position to the testing position, fixing and checking;
4) Taking down a master differential outlet pressing plate LPxx of a 750-line switch to be used, and checking;
5) Checking that the standby 750-wire switch is cold for standby;
6) Switching a 35kV bus differential protection switch QB to a bus differential retreat position;
7) Checking that the interface of a BP-2B device on a 35kV bus differential protection screen displays differential exit and differential locking exit;
8) The 3SD flow change side of the urban south 648 line switch bus difference CT terminal is grounded in a short circuit mode through 4 short-circuit screws;
9) Removing a south China 648 line switch bus difference CT terminal 3SD and connecting into 4 bus difference loop connecting screws;
10 Checking 35kV bus differential protection non-action and abnormal signals;
11 A 35kV bus differential protection switch QB is switched to a bus differential throw position;
12 Checking that the BP-2B device interface on the 35kV bus differential protection screen displays differential input and differential locking input;
13 Take off the 750 line switch trolley secondary plug-in unit to be used;
14 Pulling the trolley to be used with the 750-wire switch from the test position to the outside of the cabinet for fixing and checking;
15 Pushing a 35kV line electricity testing trolley out of a 750-wire switch cabinet to a test position at the position of a standby 750-wire switch cabinet, then shaking the trolley to a working position for fixing, and checking;
16 Three-phase electricity testing is carried out on a fixed contact at the line side of the 35kV line electricity testing trolley, after no voltage is tested, the 35kV line electricity testing trolley is shaken from a working position to a testing position, then is pulled out of the cabinet to be fixed, and then is checked;
17 Closing a grounding knife blade for 750 lines to be used and checking;
18 Switch off the standby 750-wire switch control power supply air switch 3DK2;
after the planned operation order is checked by a positive value and a long value without error and signed, and after a scheduling and a correction order are sent, the switching operation of changing the operation of the 35kV standby 750 line from the operation to the switching and line maintenance can be carried out.
Before the switching operation of the switch cabinet is executed, an operator issues a bill according to the operation steps in a graph in a background five-prevention system, and the rationality of the operation steps is verified. When the local operation is executed, the graph invoicing is finished and then the graph invoicing is transmitted into the computer key, the operator executes item by item according to the content of the operation order, and when the operation content violating the anti-misoperation locking logic is executed, the computer key realizes forced locking, and simultaneously sends out warning and prompt information to guide the operator to correctly execute the operation, thereby achieving the purpose of preventing the misoperation. During remote control operation, an operator sends an allowing signal to the monitoring system through the host computer, remote control locking of the corresponding node is unlocked, and after the operation is completed, the host computer updates the equipment state to the current actual state.
According to the requirement of high voltage distribution cabinet anti-misoperation specification, a 35kV standby 750 circuit is changed into a switch and a circuit to be overhauled by operation, and the operation ticket needs to pass the five-prevention verification one-time operation with the following 4 steps:
1) Pulling-off 750 line switch for stand-by
2) Shaking the trolley with 750 wire switches to be used from the working position to the testing position for fixing, and checking
3) Pulling the 750 wire switch trolley to be used from the test position to the outside of the cabinet for fixing, and checking
4) Closing the grounding knife to be used for 750-wire line and checking
In the operation of step 1), the five-prevention system verification can help operators to check the equipment name, and avoid the occurrence of malignant misoperation accidents of mistakenly dividing the operators into other interval switches at the background;
step 2), operating, namely installing a five-prevention lock on a 35kV standby 750 switch cabinet trolley rocking hole, so that the condition that a worker mistakenly enters a live interval can be effectively avoided, and the misoperation accident that the switch trolley is rocked to a test position from a working position under the condition that a switch is closed is caused;
step 3), operating, namely installing five-prevention locks on the front cabinet door of the 35kV standby 750 switch cabinet, so that accidents that workers open the front cabinet door of the switch cabinet under the electrified condition or when the switch trolley is not at the test position due to large working pressure and inattention can be effectively avoided;
and 4) operating, namely installing a five-prevention lock on a 35kV standby 750 switch cabinet line grounding switch, so that the occurrence of serious misoperation accidents of switching on the grounding switch when a worker is electrified or a switch trolley is not at a test position can be effectively avoided.
Among the above switching operation, through installing five locks that have the mistake locking function of preventing additional to 35kV 750 cubical switchboard for use's preceding cabinet door, dolly shake hole, circuit ground connection plug-in strip, but greatly reduced maloperation occurence of failure probability to the safety of guarantee operation personnel and grid equipment.
Meanwhile, five-prevention locks are installed on the upper rear cabinet door and the lower rear cabinet door of the 35kV standby 750 switch cabinet, so that the occurrence of personal electric shock accidents caused by the fact that a maintainer opens the rear cabinet door of the switch cabinet without authorization under the electrified condition of the 35kV standby 750 circuit can be effectively avoided.
Other embodiments of the invention may replace a 35kV standby 750 switchgear with a 10kV switchgear, a 20kV switchgear.
Claims (3)
1. An anti-misoperation locking system and method for a high-voltage power distribution cabinet of a transformer substation,
the method is characterized by comprising the following steps:
firstly, an operator makes an invoice according to a scheduling command, changes the standby circuit of the high-voltage power distribution cabinet from operation to an operation order for circuit maintenance, and specifically comprises the following procedures:
1) Opening a switch of a standby line;
2) Checking the off position determined by the line switch to be used;
3) Shaking the line switch trolley to be used from the working position to the testing position, fixing and checking;
4) Taking down a female differential outlet pressure plate LPxx of a circuit switch to be used, and checking;
5) Checking a standby line switch to determine cold standby;
6) Switching a bus differential protection switch QB of the high-voltage power distribution cabinet to a bus differential retreat position;
7) Checking that a BP-2B device interface on a bus differential protection screen of the high-voltage power distribution cabinet displays differential exit and differential locking exit;
8) 4 short-circuit screws are used for short-circuit grounding of the 3SD flow change side of the 648 line switch bus differential CT terminal of the transformer substation;
9) Dismounting a 648 wire switch bus difference CT terminal 3SD of the transformer substation and connecting into 4 bus difference loop connecting screws;
10 Checking a bus differential protection non-action and abnormal signal of the high-voltage power distribution cabinet;
11 Switching a bus differential protection switch QB of the high-voltage power distribution cabinet to a bus differential throw position;
12 Checking that a BP-2B device interface on a busbar differential protection screen of the high-voltage power distribution cabinet displays differential input and differential locking input;
13 Take off the secondary plug-in of the trolley of the line switch to be used;
14 Pulling the line switch trolley to be used from the test position to the outside of the cabinet for fixing and checking;
15 The line electricity testing trolley is pushed out to a test position from the line switch cabinet to be used, then is shaken to a working position to be fixed and is checked;
16 Three-phase electricity testing is carried out at a fixed contact at the line side of the line electricity testing trolley, after the fact that no voltage exists is verified, the line electricity testing trolley is shaken to a testing position from a working position, then is pulled to the outside of the cabinet for fixing, and then is checked;
17 Closing the line grounding knife switch to be used and checking;
18 Air switch 3DK2 to turn off the line switch control power supply to be used; after the proposed operation order is checked by a positive value and a long value without error and signed, and after a scheduling and issuing order, switching operation of switching and line maintenance of the standby line of the high-voltage power distribution cabinet can be carried out instead of operation.
2. The misoperation-preventive locking method for the high-voltage power distribution cabinet of the transformer substation according to claim 1, characterized by comprising the following steps: before switching operation of the switch cabinet is executed, an operator makes a bill in a graph in a background five-prevention system according to operation steps, and the reasonability of the operation steps is verified;
when the local operation is executed, the computer key is transmitted after the drawing invoicing is finished, the operator executes the operation item by item according to the content of the operation order, and when the operation content violating the anti-misoperation locking logic is executed, the computer key realizes forced locking, and simultaneously sends out alarm and prompt information to guide the operator to correctly execute the operation, thereby achieving the purpose of preventing misoperation;
during remote control operation, an operator sends an allowing signal to the monitoring system through the host computer, remote control locking of the corresponding node is unlocked, and after the operation is completed, the host computer updates the equipment state to the current actual state.
3. The misoperation prevention locking method for the high-voltage power distribution cabinet of the transformer substation according to claim 2, characterized in that:
according to high voltage distribution cabinet prevent mistake operation standard requirement, high voltage distribution cabinet's circuit for use changes the switch and the circuit maintenance into by the operation, need pass through five prevent the primary operation of verifying in the operation ticket, specifically include following 4 steps:
1) Opening a switch of a standby line;
2) Shaking the line switch trolley to be used from the working position to the testing position, fixing and checking;
3) Pulling the line switch trolley to be used from the test position to the outside of the cabinet for fixing, and checking;
4) Closing the line grounding knife switch to be used and checking;
in the operation of step 1), the five-prevention system verification can help operators to check the equipment name, and avoid the occurrence of malignant misoperation accidents that the operators mistakenly divide other interval switches in the background;
in the step 2), a five-prevention lock is arranged in a trolley rocking hole of a switch cabinet of a standby circuit of the high-voltage power distribution cabinet, so that the condition that a worker mistakenly enters a live interval can be effectively avoided, and the trolley is rocked from a working position to a test position to generate misoperation accidents under the condition that a switch is closed;
in the operation of the step 3), the five-prevention lock is arranged on the front cabinet door of the switch cabinet of the standby circuit of the high-voltage power distribution cabinet, so that the accidents that the front cabinet door of the switch cabinet is opened under the electrified condition or when the switch trolley is not at the test position due to high working pressure and inattention of workers can be effectively avoided;
in the operation of the step 4), the five-prevention lock is installed on the switch cabinet line grounding switch of the standby line of the high-voltage power distribution cabinet, so that the occurrence of serious misoperation accidents such as the fact that a worker closes the grounding switch in an electrified way or a switch trolley closes the grounding switch when the switch trolley is not at a test position can be effectively avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463321.7A CN115441345A (en) | 2020-12-09 | 2020-12-09 | Misoperation-preventing locking system and method for high-voltage power distribution cabinet of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463321.7A CN115441345A (en) | 2020-12-09 | 2020-12-09 | Misoperation-preventing locking system and method for high-voltage power distribution cabinet of transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115441345A true CN115441345A (en) | 2022-12-06 |
Family
ID=84272128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011463321.7A Withdrawn CN115441345A (en) | 2020-12-09 | 2020-12-09 | Misoperation-preventing locking system and method for high-voltage power distribution cabinet of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115441345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116880385A (en) * | 2023-07-06 | 2023-10-13 | 华能(广东)能源开发有限公司汕头电厂 | A control method and system for intelligent switch cabinet |
-
2020
- 2020-12-09 CN CN202011463321.7A patent/CN115441345A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116880385A (en) * | 2023-07-06 | 2023-10-13 | 华能(广东)能源开发有限公司汕头电厂 | A control method and system for intelligent switch cabinet |
| CN116880385B (en) * | 2023-07-06 | 2024-05-10 | 华能(广东)能源开发有限公司汕头电厂 | A control method and system for intelligent switch cabinet |
| US12237667B2 (en) | 2023-07-06 | 2025-02-25 | Shantou Power Plant Of Huaneng (Guangdong) Energy Development Co., Ltd. | Method and system for controlling intelligent switch cabinet |
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Legal Events
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221206 |
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| WW01 | Invention patent application withdrawn after publication |