CN109473871B - Microcomputer anti-misoperation locking device and method for grounding knife switch of high-voltage switch cabinet - Google Patents
Microcomputer anti-misoperation locking device and method for grounding knife switch of high-voltage switch cabinet Download PDFInfo
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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
- H02B1/16—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
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
The invention relates to the field of transformer substation safety tools, in particular to a microcomputer anti-misoperation locking device and a method for a high-voltage switch cabinet grounding switch blade, wherein the device consists of a high-voltage switch cabinet grounding switch blade, a live display device and a five-prevention lock, and the using method comprises the following steps: the operator issues a bill according to the dispatching command, after the proposed operation bill is checked to have no error and signed by a positive value and a long value, the operation of a certain line route can be changed into switching operation for switching and line maintenance, and before a line grounding switch blade is connected, the electrified display microcomputer anti-misoperation locking device of the grounding switch blade of the high-voltage switch cabinet is used for verifying that the line is free of electricity, so that the operation can be carried out. The invention has the beneficial effects that: the invention improves the anti-misoperation locking function of the grounding switch blade of the high-voltage switch cabinet, and has the advantages of greatly reducing the occurrence probability of misoperation accidents, effectively ensuring the personal safety of operation and maintainers and ensuring the safe operation of a power grid.
Description
Technical Field
The invention relates to the field of transformer substation safety tools, in particular to a microcomputer anti-misoperation locking device and method for a grounding knife switch of a high-voltage switch cabinet.
Background
With the rapid development of power systems and the increasing requirements on power supply reliability, the function of the switch cabinet in a transformer substation is increasingly prominent. The installation of a misoperation prevention locking device on a high-voltage switch cabinet is a fundamental measure for ensuring personal, power grid and equipment safety in power production. The high-voltage switch cabinet should install perfect anti-misoperation locking device, and have perfect reliable anti-misoperation locking function, do not have the additional mechanical lock of anti-misoperation locking function. Especially, electricity testing before closing a grounding switch or opening a cabinet door is very important.
Most of high-voltage electrified display devices installed on the existing equipment are prompting type, and even if a forced electrified display device is installed, the functions of the display device cannot be exerted because of lack of an actual forced locking means and matched locking equipment. In addition, the anti-misoperation locking mode on the existing market mostly belongs to the interval type and prevents mistake, and only from the angle of interval, as long as it is electroless to detect equipment under test, the cabinet door just can be opened, and the logic is too simple, does not consider other factors, as long as the cabinet door that satisfies this condition can all be opened in principle, just so probably causes the cabinet door of opening the mistake or some cabinet doors that need not open originally to be opened and opened, has certain safe risk. Therefore, an electrified display device which can be combined with a microcomputer anti-misoperation system and can judge whether a line is electrified or not by self is urgently needed to be developed, and personal and major equipment accidents caused by incomplete electricity testing or mistaken opening of a cabinet door are eliminated.
Chinese patent CN 102761101B, published as day 2012, month 10 and day 3, and having a high voltage live display system with an anti-misoperation interface, which comprises a microcomputer, a mushroom-shaped sensor capable of transmitting active signals, an electricity testing device capable of processing digital signals of information transmitted by the mushroom-shaped sensor, an anti-misoperation computer key interface and an electrical contact capable of being seamlessly integrated with the anti-misoperation system, and is combined with a microcomputer anti-misoperation system to realize forced locking interface devices of various complex applications and various target devices, an anti-misoperation device composed of an electromagnetic lock and an electrical intelligent lock capable of locking an operation bus or a line side ground switch, and an unlocking device capable of decoding the locking state of the anti-misoperation device, and combines a wireless communication technology and an induction technology to lay and install cables without power outage; the electrified display technology is combined with the locking technology, and the electrified display technology is integrated with a microcomputer anti-misoperation system and other anti-misoperation locks for use to carry out electrified locking on corresponding equipment; the power consumption management and energy storage display technology is adopted, and high-brightness indication and locking signal output are carried out under the condition of no external power supply; bringing information of high-voltage live display states of a connection line, a line of user power generation equipment and a bus into an operation flow, and performing forced electricity test and operation locking on relevant operation equipment; the system formed by the microcomputer and the anti-misoperation device controls the live display and locking of the primary equipment, and meanwhile, an equipment logic library is established on a platform of the microcomputer anti-misoperation system to control the operation process. Practice proves that the electromagnetic lock has high failure rate, is often jammed, cannot return to an unlocking button in time to cause the problem that a coil is electrified for a long time, and the like, and the electromagnetic lock is just unreliable.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device which is simple in structure, convenient and reliable to operate, attractive in appearance and capable of effectively locking a high-voltage switch cabinet and a using method.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a microcomputer anti-misoperation locking device of a high-voltage switch cabinet grounding knife switch comprises a high-voltage switch cabinet grounding knife switch, a live display device and a five-prevention lock, wherein the high-voltage switch cabinet grounding knife switch comprises a line grounding knife switch, a bus voltage change grounding knife switch and a bus grounding knife switch; the five-prevention lock is connected with the electrified display device through the logic unit; the live display device comprises a plurality of high-voltage sensor units, a shielding wire and a display unit, wherein the plurality of high-voltage sensor units are respectively connected with a high-voltage bus, the shielding wire connects the high-voltage sensor units with the display unit, and the display unit comprises a plurality of indicator light positions, an electronic circuit and a computer key interface matched with a five-prevention computer operation key. The display unit can show whether high-voltage bus is electrified to pass through the logical unit with five prevent locks and be connected, send the electrified condition of high-voltage bus to five prevent the lock, supply five to prevent that the lock prevents that live working from providing information.
Preferably, the electronic circuit comprises a plurality of booster circuits and a plurality of indicating circuits, the booster circuits are connected with the high-voltage sensor unit and the indicating circuits, the indicating circuits are respectively electrically connected with the indicating lamp, each indicating circuit comprises a voltage stabilizing diode, a current limiting resistor and a light emitting diode, one end of the input end of each booster circuit is connected with the output end of the high-voltage sensor unit through a shielding wire, the other end of each booster circuit is grounded through the current limiting resistor, the first end of the output end of each booster circuit is connected with the cathode of the voltage stabilizing diode and the anode of the light emitting diode, the anode of the voltage stabilizing diode and the cathode of the light emitting diode are connected with the second end of the output end of the booster circuit. The alternating voltage passing through the high-voltage sensing unit can be increased through the booster circuit, so that the brightness of the light-emitting diode is improved, the indicating effect is enhanced, and the judgment of an operator is facilitated.
Preferably, the electronic circuit comprises a plurality of booster circuits and a plurality of indicating loops, and the booster circuits are connected with the high-voltage sensor unit and the indicating loops; the boosting circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a zener diode D11, a zener diode D12, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3, a MOS tube Q4, a MOS tube Q5 and a MOS tube Q6, wherein the MOS tube Q6, the MOS tube Q6 and the MOS tube Q6 are depletion type P-channel MOS tubes, the MOS tube Q6 and the MOS tube Q6 are enhancement type N-channel MOS tubes, the capacitor C6 and the capacitor C6 are equivalent in parameters, a first end of the capacitor C6, a cathode of the zener diode D6, a drain of the MOS tube Q6 and a drain of the MOS tube Q6 are connected with a second end of the MOS tube P-channel MOS tube, a drain of the MOS tube Q6 and a drain of the MOS tube Q6 are connected with a drain of the high-diode C6, a drain of the high-voltage sensing unit, and a drain of, the cathode of the diode D1 is grounded, the source of the MOS transistor Q2 and the first end of the capacitor C2 are connected with the source of the MOS transistor Q3, and the grid of the MOS transistor Q1, the grid of the MOS transistor Q2, the grid of the MOS transistor Q3 and the first end of the capacitor C5 are connected with the anode of the voltage stabilizing diode D11; the base of the MOS transistor Q1, the base of the MOS transistor Q2, the base of the MOS transistor Q3, the base of the MOS transistor Q4, the base of the MOS transistor Q5, the base of the MOS transistor Q6, the second end of the capacitor C5 and the second end of the capacitor C6 are all grounded; the second end of the capacitor C3 and the source of the MOS transistor Q4 are connected with the drain of the MOS transistor Q5, the drain of the MOS transistor Q4 and the cathode of the diode D2 are connected with the second end of the capacitor C4, the anode of the diode D2 is grounded, the first end of the capacitor C4 and the source of the MOS transistor Q5 are connected with the source of the MOS transistor Q6, and the grid of the MOS transistor Q4, the grid of the MOS transistor Q5, the grid of the MOS transistor Q6 and the first end of the capacitor C6 are connected with the anode of the zener diode D12; the indicating loop comprises a voltage stabilizing diode D13, a light emitting diode D21 and a current limiting resistor R, wherein the cathode of the voltage stabilizing diode D13 is connected with the second end of a capacitor C4, the anode of the voltage stabilizing diode D13 is connected with the cathode of a light emitting diode D21, the first end of the current limiting resistor R is connected with the second end of a capacitor C2, the cathode of the voltage stabilizing diode D13 is connected with the anode of the light emitting diode D21, and the second end of the current limiting resistor R is grounded.
The boosting circuit completes the functions that when a point P1 is electrified and the potential is positive, a MOS tube Q1 and a MOS tube Q3 are switched on, the MOS tube Q2 is cut off, at the moment, capacitors C1 and C2 are connected in parallel, when capacitors C1 and C2 are charged, a MOS tube Q1 and a MOS tube Q3 are cut off, a MOS tube Q2 is switched on, at the moment, capacitors C1 and C2 are connected in series, and the switching-on or cutting-off change time of the MOS tube Q1, the MOS tube Q2 and the MOS tube Q3 can be adjusted by adjusting the parameters of zener diodes D11 and D12 so as to be matched with the charging process of the capacitors C1 and C2; similarly, when the potential at the point P1 is negative, the capacitors C3 and C4 are charged, and when the charging is completed, the capacitors C3 and C4 are changed from parallel connection to series connection, the capacitors C1, C2, C3 and C4 are selected as capacitors with larger capacity, and the capacitors C5 and C6 are selected as capacitors with smaller capacity, so that after the alternating voltage at the point P1 undergoes a plurality of cycles, the capacitors C1, C2, C3 and C4 can be charged until the voltage reaches the reverse breakdown voltage of the zener diodes D11 and D12, and thus a discharge source formed by connecting the capacitors C1, C2, C3 and C4 in series can be formed, so that the voltage is increased by 4 times, the brightness of the light emitting diode D21 is periodically and temporarily increased, and the indicating effect is enhanced.
Preferably, when the output result of the logic unit of the high-voltage switch cabinet electrified display device is true, the five-prevention locking lock is used.
A microcomputer anti-misoperation locking method for a high-voltage switch cabinet grounding switch blade is carried out by utilizing the microcomputer anti-misoperation locking device for the high-voltage switch cabinet grounding switch blade, and is suitable for the microcomputer anti-misoperation locking device for the high-voltage switch cabinet grounding switch blade, and comprises the following steps: A1) the operator makes a bill according to the scheduling command; A2) after the planned operation ticket is checked to have no error and signed by a positive value and a long value, switching operation of changing certain line route operation into switching and line maintenance is carried out; A3) before the line is connected with the grounding knife switch, if the grounding knife switch of the high-voltage switch cabinet is electrified, the microcomputer anti-misoperation locking device verifies that the line is not electrified, then the line grounding knife switch can be switched on.
Preferably, an operator issues a ticket according to a scheduling command, and changes the operation of a certain capacitor into an operation ticket for switch and capacitor maintenance, and the method specifically comprises the following steps:
B1) opening the capacitor switch;
B2) checking that the capacitor switch is indeed in the open position;
B3) switching the capacitor switch remote/local switch to a local location and checking;
B4) pulling the capacitor switch trolley from the working position to a test position for fixing and checking;
B5) pulling the capacitor knife switch open and checking;
B6) taking down the capacitor switch mother difference outlet pressure plate T L P3 and checking;
B7) checking that the capacitor switch is indeed cold for use;
B8) taking down the secondary plug-in of the capacitor switch trolley;
B9) pulling the capacitor switch trolley out of the cabinet from the test position, and checking;
B10) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
B11) the 3SD current flowing side of the capacitor switch bus difference CT terminal is short-circuited and grounded by using 4 connecting screws;
B12) removing the capacitor switch bus differential CT terminal 3SD and connecting into the bus differential loop connecting screw 4;
B13) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
B14) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
B15) checking that the capacitor switch is in a switch maintenance state;
B16) verifying the absence of a voltage on the capacitor side live display lockout device of the capacitor switch cabinet;
B17) on the electrified display locking device of the capacitor switch cabinet, a five-prevention computer operation key is used, and voltage verification is carried out by confirming;
B18) closing the capacitor grounding knife switch and checking;
B19) after the fact that no voltage exists between the capacitor cable head and the reactor is verified, hanging a # × grounding wire pair, and checking;
B20) the capacitor switch is turned off to control the power supply air switch 1 DK.
Preferably, an operator issues a ticket according to a scheduling command, and changes a hot standby mode of a certain line into an operation ticket for switching and line maintenance, and the method specifically comprises the following steps:
C1) checking that the line switch is indeed in the hot standby position;
C2) pulling the line switch trolley from the working position to a test position for fixing and checking;
C3) disconnect the line voltage variable secondary air switch ZKK;
C4) pulling the line voltage-variable trolley from the working position to the test position for fixing and checking;
C5) taking down the line switch female differential outlet pressure plate T L P15 and checking;
C6) checking that the line switch is cold for standby;
C7) taking down the secondary plug-in of the line switch trolley;
C8) pulling the line switch trolley out of the cabinet from the test position, and checking;
C9) taking down the secondary plug-in of the line voltage-variable trolley;
C10) pulling the line voltage-variable trolley out of the cabinet from the test position, and checking;
C11) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
C12) the current change side of the circuit switch bus differential CT terminal 15SD is short-circuited and grounded by using 4 connecting screws;
C13) the circuit switch bus differential CT terminal 15SD is removed and is connected into a bus differential loop connecting screw 4;
C14) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
C15) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
C16) three phases are verified to be without voltage between the line switch and the line wall bushing;
C17) verifying that no voltage exists on the live display locking device on the line side of the line switch cabinet;
C18) the five-prevention computer operation key is used on the line electrified display locking device to pass the verification of the determined voltage;
C19) closing the line grounding knife switch and checking;
C20) the line switch is turned off to control the power supply air switch 1 DK.
Preferably, the use method of the five-prevention computer operation key combined with the microcomputer anti-misoperation locking device of the grounding switch blade of the high-voltage switch cabinet comprises the following steps: D1) inputting a corresponding operation sequence in the microcomputer five-prevention system and transmitting the operation sequence to the five-prevention key; D2) the method comprises the steps of operating according to operation tickets item by item, and verifying the correctness of an operation sequence through a five-prevention key, wherein before a grounding switch blade is closed, the five-prevention key is inserted into the grounding switch blade of the high-voltage switch cabinet to display a microcomputer anti-misoperation locking device in an electrified mode, whether a line is electrified is verified, if no electricity exists, the operation is continued, if electricity exists, the operation is stopped, the reason is checked, after a fault is eliminated, the grounding switch blade of the high-voltage switch cabinet is electrified to display the microcomputer anti-misoperation locking device to display that the line is not electrified, and the operation is.
The substantial effects of the invention are as follows: the invention improves the anti-misoperation locking function of the grounding switch blade of the high-voltage switch cabinet, and has the advantages of greatly reducing the occurrence probability of misoperation accidents, effectively ensuring the personal safety of operation and maintainers and ensuring the safe operation of a power grid.
Drawings
Fig. 1 is a structure diagram of a microcomputer anti-misoperation locking device of a grounding knife switch of a high-voltage switch cabinet.
Fig. 2 is a structural view of the charged display device.
FIG. 3 is a schematic diagram of the electrical connection of the boost circuit and the indicator circuit.
FIG. 4 is a flow chart of a method for using the five-prevention computer-operated key.
Wherein: 1. the high-voltage bus comprises a high-voltage bus 2, a high-voltage sensing unit 3, a display unit 4, a shielding wire 5, an indicating lamp position 6 and a computer key interface.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
As shown in fig. 1, the structure diagram of the microcomputer error-proof locking device of the grounding knife switch of the high-voltage switch cabinet is shown in fig. 2, the structure diagram of the electrified display device is shown, the microcomputer error-proof locking device of the grounding knife switch of the high-voltage switch cabinet comprises a grounding knife switch of the high-voltage switch cabinet, an electrified display device and a five-prevention lock, the grounding knife switch of the high-voltage switch cabinet comprises a line grounding knife switch, a bus voltage-variable grounding knife switch and a bus grounding knife switch, and the five-prevention lock with the error-proof locking function is additionally arranged at the positions of the line grounding knife switch, the bus voltage-variable grounding knife switch and the bus; the five-prevention lock is connected with the electrified display device through the logic unit; electrified display device includes a plurality of high pressure sensor unit 2, shielded wire 4 and display element 3, and a plurality of high pressure sensor unit 2 is connected with a high voltage bus 1 respectively, and shielded wire 4 is connected high pressure sensor unit 2 and display element 3, and display element 3 includes a plurality of pilot lamp position 5, electronic circuit and with five computer operation key looks adaptations's computer key interface 6. The display unit 3 can show whether the high-voltage bus 1 is electrified to pass through the logical unit with five prevent locks and be connected, send the electrified condition of high-voltage bus 1 to five prevent locks, supply five to prevent that the electrified operation of lock from providing information.
As shown in fig. 3, which is a schematic diagram of electrical connection between a booster circuit and an indication circuit, the electronic circuit includes a plurality of booster circuits and a plurality of indication circuits, and the booster circuits are connected with the high-voltage sensor unit and the indication circuits; the boosting circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a zener diode D11, a zener diode D12, a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4, a MOS transistor Q5 and a MOS transistor Q6, wherein the MOS transistors Q6, the MOS transistor Q6 and the MOS transistor Q6 are depletion type P-channel MOS transistors, the MOS transistor Q6 and the MOS transistor Q6 are enhancement type N-channel MOS transistors, the capacitors C6 and the capacitors C6 are equivalent in parameters, a first end of the capacitor C6, a zener diode D6, a cathode of the MOS transistor Q6, a drain of the MOS transistor Q6 and a drain of the MOS transistor Q6 are connected with a second end of the high-voltage-drain of the MOS transistor P-source, and a drain of the MOS transistor Q6 are connected with, the cathode of the diode D1 is grounded, the source of the MOS transistor Q2 and the first end of the capacitor C2 are connected with the source of the MOS transistor Q3, and the grid of the MOS transistor Q1, the grid of the MOS transistor Q2, the grid of the MOS transistor Q3 and the first end of the capacitor C5 are connected with the anode of the voltage stabilizing diode D11; the base of the MOS transistor Q1, the base of the MOS transistor Q2, the base of the MOS transistor Q3, the base of the MOS transistor Q4, the base of the MOS transistor Q5, the base of the MOS transistor Q6, the second end of the capacitor C5 and the second end of the capacitor C6 are all grounded; the second end of the capacitor C3 and the source of the MOS transistor Q4 are connected with the drain of the MOS transistor Q5, the drain of the MOS transistor Q4 and the cathode of the diode D2 are connected with the second end of the capacitor C4, the anode of the diode D2 is grounded, the first end of the capacitor C4 and the source of the MOS transistor Q5 are connected with the source of the MOS transistor Q6, and the grid of the MOS transistor Q4, the grid of the MOS transistor Q5, the grid of the MOS transistor Q6 and the first end of the capacitor C6 are connected with the anode of the zener diode D12; the indicating loop comprises a voltage stabilizing diode D13, a light emitting diode D21 and a current limiting resistor R, wherein the cathode of the voltage stabilizing diode D13 is connected with the second end of a capacitor C4, the anode of the voltage stabilizing diode D13 is connected with the cathode of a light emitting diode D21, the first end of the current limiting resistor R is connected with the second end of a capacitor C2, the cathode of the voltage stabilizing diode D13 is connected with the anode of the light emitting diode D21, and the second end of the current limiting resistor R is grounded.
The functions completed by the booster circuit are as follows: when the point P1 is charged and the potential is positive, the MOS tube Q1 and the MOS tube Q3 are switched on, the MOS tube Q2 is cut off, the capacitors C1 and C2 are connected in parallel at the moment, when the capacitors C1 and C2 finish charging, the MOS tube Q1 and the MOS tube Q3 are cut off, the MOS tube Q2 is switched on, the capacitors C1 and C2 are connected in series at the moment, and the switching-on or switching-off change timings of the MOS tube Q1, the MOS tube Q2 and the MOS tube Q3 can be adjusted to be matched with the charging process of the capacitors C1 and C2 by adjusting the parameters of the zener diodes D11 and D12; similarly, when the potential at the point P1 is negative, the capacitors C3 and C4 are charged, and when the charging is completed, the capacitors C3 and C4 are changed from parallel connection to series connection, the capacitors C1, C2, C3 and C4 are selected as capacitors with larger capacity, and the capacitors C5 and C6 are selected as capacitors with smaller capacity, so that after the alternating voltage at the point P1 undergoes a plurality of cycles, the capacitors C1, C2, C3 and C4 can be charged until the voltage reaches the reverse breakdown voltage of the zener diodes D11 and D12, and thus a discharge source formed by connecting the capacitors C1, C2, C3 and C4 in series can be formed, so that the voltage is increased by 4 times, the brightness of the light emitting diode D21 is periodically and temporarily increased, and the indicating effect is enhanced.
The microcomputer anti-misoperation locking method of the high-voltage switch cabinet grounding knife switch comprises the following steps: A1) the operator makes a bill according to the scheduling command; A2) after the planned operation ticket is checked to have no error and signed by a positive value and a long value, switching operation of changing certain line route operation into switching and line maintenance is carried out; A3) before the line is connected with the grounding knife switch, if the grounding knife switch of the high-voltage switch cabinet is electrified, the microcomputer anti-misoperation locking device verifies that the line is not electrified, then the line grounding knife switch can be switched on.
An operator issues a bill according to a scheduling command, and changes the operation of a certain capacitor into an operation bill for switch and capacitor maintenance, and the method specifically comprises the following steps:
B1) opening the capacitor switch;
B2) checking that the capacitor switch is indeed in the open position;
B3) switching the capacitor switch remote/local switch to a local location and checking;
B4) pulling the capacitor switch trolley from the working position to a test position for fixing and checking;
B5) pulling the capacitor knife switch open and checking;
B6) taking down the capacitor switch mother difference outlet pressure plate T L P3 and checking;
B7) checking that the capacitor switch is indeed cold for use;
B8) taking down the secondary plug-in of the capacitor switch trolley;
B9) pulling the capacitor switch trolley out of the cabinet from the test position, and checking;
B10) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
B11) the 3SD current flowing side of the capacitor switch bus difference CT terminal is short-circuited and grounded by using 4 connecting screws;
B12) removing the capacitor switch bus differential CT terminal 3SD and connecting into the bus differential loop connecting screw 4;
B13) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
B14) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
B15) checking that the capacitor switch is in a switch maintenance state;
B16) verifying the absence of a voltage on the capacitor side live display lockout device of the capacitor switch cabinet;
B17) on the electrified display locking device of the capacitor switch cabinet, a five-prevention computer operation key is used, and voltage verification is carried out by confirming;
B18) closing the capacitor grounding knife switch and checking;
B19) after the fact that no voltage exists between the capacitor cable head and the reactor is verified, hanging a # × grounding wire pair, and checking;
B20) the capacitor switch is turned off to control the power supply air switch 1 DK.
An operator issues a bill according to a scheduling command, and changes a hot standby mode of a certain line into an operation bill for switching and line maintenance, and the method specifically comprises the following steps:
C1) checking that the line switch is indeed in the hot standby position;
C2) pulling the line switch trolley from the working position to a test position for fixing and checking;
C3) disconnect the line voltage variable secondary air switch ZKK;
C4) pulling the line voltage-variable trolley from the working position to the test position for fixing and checking;
C5) taking down the line switch female differential outlet pressure plate T L P15 and checking;
C6) checking that the line switch is cold for standby;
C7) taking down the secondary plug-in of the line switch trolley;
C8) pulling the line switch trolley out of the cabinet from the test position, and checking;
C9) taking down the secondary plug-in of the line voltage-variable trolley;
C10) pulling the line voltage-variable trolley out of the cabinet from the test position, and checking;
C11) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
C12) the current change side of the circuit switch bus differential CT terminal 15SD is short-circuited and grounded by using 4 connecting screws;
C13) the circuit switch bus differential CT terminal 15SD is removed and is connected into a bus differential loop connecting screw 4;
C14) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
C15) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
C16) three phases are verified to be without voltage between the line switch and the line wall bushing;
C17) verifying that no voltage exists on the live display locking device on the line side of the line switch cabinet;
C18) the five-prevention computer operation key is used on the line electrified display locking device to pass the verification of the determined voltage;
C19) closing the line grounding knife switch and checking;
C20) the line switch is turned off to control the power supply air switch 1 DK.
Fig. 4 shows a flow chart of a method for using a five-prevention computer-operated key. The use method of the microcomputer anti-misoperation locking device of the grounding switch blade of the high-voltage switch cabinet by combining the five-prevention computer operation key comprises the following steps: D1) inputting a corresponding operation sequence in the microcomputer five-prevention system and transmitting the operation sequence to the five-prevention key; D2) the method comprises the steps of operating according to operation tickets item by item, and verifying the correctness of an operation sequence through a five-prevention key, wherein before a grounding switch blade is closed, the five-prevention key is inserted into the grounding switch blade of the high-voltage switch cabinet to display a microcomputer anti-misoperation locking device in an electrified mode, whether a line is electrified is verified, if no electricity exists, the operation is continued, if electricity exists, the operation is stopped, the reason is checked, after a fault is eliminated, the grounding switch blade of the high-voltage switch cabinet is electrified to display the microcomputer anti-misoperation locking device to display that the line is not electrified, and the operation is.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (7)
1. A microcomputer anti-misoperation locking device of a grounding knife switch of a high-voltage switch cabinet is characterized in that,
comprises a high-voltage switch cabinet grounding knife switch, a live display device and a five-prevention lock,
the grounding knife switch of the high-voltage switch cabinet comprises a line grounding knife switch, a bus voltage-variable grounding knife switch and a bus grounding knife switch, and five-prevention locks with anti-misoperation locking functions are additionally arranged at the line grounding knife switch, the bus voltage-variable grounding knife switch and the bus grounding knife switch; the five-prevention lock is connected with the electrified display device through the logic unit; the live display device comprises a plurality of high-voltage sensor units, a shielding wire and a display unit, wherein the high-voltage sensor units are respectively connected with a high-voltage bus, the shielding wire connects the high-voltage sensor units with the display unit, the display unit comprises a plurality of indicating lamp positions, an electronic circuit and a computer key interface matched with a five-prevention computer operation key, and the electronic circuit comprises a plurality of booster circuits and a plurality of indicating loops;
the booster circuit is connected with the high-voltage sensor unit and the indicating loops, the indicating loops are electrically connected with the indicating lamps respectively, each indicating loop comprises a voltage stabilizing diode, a current limiting resistor and a light emitting diode, one end of the input end of the booster circuit is connected with the output end of the high-voltage sensing unit through a shielding wire, the other end of the input end of the booster circuit is grounded through the current limiting resistor, the first end of the output end of the booster circuit is connected with the cathode of the voltage stabilizing diode and the anode of the light emitting diode, the anode of the voltage stabilizing diode and the cathode of the light emitting diode are connected with the second end of the output end of;
the electronic circuit comprises a plurality of booster circuits and a plurality of indicating loops, and the booster circuits are connected with the high-voltage sensor units and the indicating loops;
the boosting circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a diode D1, a diode D2, a zener diode D11, a zener diode D12, a MOS tube Q1, a MOS tube Q2, a MOS tube Q3, a MOS tube Q4, a MOS tube Q5 and a MOS tube Q6, wherein the MOS tube Q6, the MOS tube Q6 and the MOS tube Q6 are depletion type P-channel MOS tubes, the MOS tube Q6 and the MOS tube Q6 are enhancement type N-channel MOS tubes, the capacitor C6 and the capacitor C6 are equivalent in parameters, a first end of the capacitor C6, a cathode of the zener diode D6, a drain of the MOS tube Q6 and a drain of the MOS tube Q6 are connected with a second end of the MOS tube P-channel MOS tube, a drain of the MOS tube Q6 and a drain of the MOS tube Q6 are connected with a drain of the high-diode C6, a drain of the high-voltage sensing unit, and a drain of, the cathode of the diode D1 is grounded, the source of the MOS transistor Q2 and the first end of the capacitor C2 are connected with the source of the MOS transistor Q3, and the grid of the MOS transistor Q1, the grid of the MOS transistor Q2, the grid of the MOS transistor Q3 and the first end of the capacitor C5 are connected with the anode of the voltage stabilizing diode D11;
the base of the MOS transistor Q1, the base of the MOS transistor Q2, the base of the MOS transistor Q3, the base of the MOS transistor Q4, the base of the MOS transistor Q5, the base of the MOS transistor Q6, the second end of the capacitor C5 and the second end of the capacitor C6 are all grounded;
the second end of the capacitor C3 and the source of the MOS transistor Q4 are connected with the drain of the MOS transistor Q5, the drain of the MOS transistor Q4 and the cathode of the diode D2 are connected with the second end of the capacitor C4, the anode of the diode D2 is grounded, the first end of the capacitor C4 and the source of the MOS transistor Q5 are connected with the source of the MOS transistor Q6, and the grid of the MOS transistor Q4, the grid of the MOS transistor Q5, the grid of the MOS transistor Q6 and the first end of the capacitor C6 are connected with the anode of the zener diode D12;
the indicating loop comprises a voltage stabilizing diode D13, a light emitting diode D21 and a current limiting resistor R, wherein the cathode of the voltage stabilizing diode D13 is connected with the second end of a capacitor C4, the anode of the voltage stabilizing diode D13 is connected with the cathode of a light emitting diode D21, the first end of the current limiting resistor R is connected with the second end of a capacitor C2, the cathode of the voltage stabilizing diode D13 is connected with the anode of the light emitting diode D21, and the second end of the current limiting resistor R is grounded;
the parameters of the voltage stabilizing diodes D11 and D12 are adjusted, so that the switching-on or switching-off change time of the MOS transistor Q1, the MOS transistor Q2 and the MOS transistor Q3 can be adjusted to be matched with the charging process of the capacitors C1 and C2; similarly, when the potential at point P1 is negative, capacitors C3 and C4 will be charged, and capacitors C3 and C4 will be switched from parallel to series when charging is completed, capacitors C1, C2, C3 and C4 are selected as capacitors with larger capacity, and capacitors C5 and C6 are selected as capacitors with smaller capacity.
2. The microcomputer anti-misoperation locking device for the grounding switch blade of the high-voltage switch cabinet according to claim 1,
and when the output result of the logic unit of the electrified display device of the high-voltage switch cabinet is true, the five-prevention locking lock is used.
3. A microcomputer anti-misoperation locking method of a high-voltage switch cabinet grounding switch blade by using the microcomputer anti-misoperation locking device of the high-voltage switch cabinet grounding switch blade is suitable for the microcomputer anti-misoperation locking device of the high-voltage switch cabinet grounding switch blade according to claim 2,
the method comprises the following steps:
A1) the operator makes a bill according to the scheduling command;
A2) after the planned operation ticket is checked to have no error and signed by a positive value and a long value, switching operation of changing certain line route operation into switching and line maintenance is carried out;
A3) before the line is connected with the grounding knife switch, if the grounding knife switch of the high-voltage switch cabinet is electrified, the microcomputer anti-misoperation locking device verifies that the line is not electrified, then the line grounding knife switch can be switched on.
4. The microcomputer anti-misoperation locking method for the grounding switch blade of the high-voltage switch cabinet according to claim 3,
an operator issues a bill according to a scheduling command, and changes the operation of a certain capacitor into an operation bill for switch and capacitor maintenance, and the method specifically comprises the following steps:
B1) opening the capacitor switch;
B2) checking that the capacitor switch is indeed in the open position;
B3) switching the capacitor switch remote/local switch to a local location and checking;
B4) pulling the capacitor switch trolley from the working position to a test position for fixing and checking;
B5) pulling the capacitor knife switch open and checking;
B6) taking down the capacitor switch mother difference outlet pressure plate T L P3 and checking;
B7) checking that the capacitor switch is indeed cold for use;
B8) taking down the secondary plug-in of the capacitor switch trolley;
B9) pulling the capacitor switch trolley out of the cabinet from the test position, and checking;
B10) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
B11) the 3SD current flowing side of the capacitor switch bus difference CT terminal is short-circuited and grounded by using 4 connecting screws;
B12) removing the capacitor switch bus differential CT terminal 3SD and connecting into the bus differential loop connecting screw 4;
B13) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
B14) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
B15) checking that the capacitor switch is in a switch maintenance state;
B16) verifying the absence of a voltage on the capacitor side live display lockout device of the capacitor switch cabinet;
B17) on the electrified display locking device of the capacitor switch cabinet, a five-prevention computer operation key is used, and voltage verification is carried out by confirming;
B18) closing the capacitor grounding knife switch and checking;
B19) after the fact that no voltage exists between the capacitor cable head and the reactor is verified, hanging a # × grounding wire pair, and checking;
B20) the capacitor switch is turned off to control the power supply air switch 1 DK.
5. The microcomputer anti-misoperation locking method for the grounding switch blade of the high-voltage switch cabinet according to claim 3 or 4,
an operator issues a bill according to a scheduling command, and changes a hot standby mode of a certain line into an operation bill for switching and line maintenance, and the method specifically comprises the following steps:
C1) checking that the line switch is indeed in the hot standby position;
C2) pulling the line switch trolley from the working position to a test position for fixing and checking;
C3) disconnect the line voltage variable secondary air switch ZKK;
C4) pulling the line voltage-variable trolley from the working position to the test position for fixing and checking;
C5) taking down the line switch female differential outlet pressure plate T L P15 and checking;
C6) checking that the line switch is cold for standby;
C7) taking down the secondary plug-in of the line switch trolley;
C8) pulling the line switch trolley out of the cabinet from the test position, and checking;
C9) taking down the secondary plug-in of the line voltage-variable trolley;
C10) pulling the line voltage-variable trolley out of the cabinet from the test position, and checking;
C11) taking down the 35kV bus differential protection input pressure plate 1L P1, and checking;
C12) the current change side of the circuit switch bus differential CT terminal 15SD is short-circuited and grounded by using 4 connecting screws;
C13) the circuit switch bus differential CT terminal 15SD is removed and is connected into a bus differential loop connecting screw 4;
C14) checking that an alarm lamp is turned off when the 35kV bus differential protection RCS-915 device is used, and no alarm signal is displayed on a display screen;
C15) putting a 35kV busbar differential protection input pressure plate 1L P1, and checking;
C16) three phases are verified to be without voltage between the line switch and the line wall bushing;
C17) verifying that no voltage exists on the live display locking device on the line side of the line switch cabinet;
C18) the five-prevention computer operation key is used on the line electrified display locking device to pass the verification of the determined voltage;
C19) closing the line grounding knife switch and checking;
C20) the line switch is turned off to control the power supply air switch 1 DK.
6. The microcomputer anti-misoperation locking method for the grounding switch blade of the high-voltage switch cabinet according to claim 3 or 4,
the use method of the microcomputer anti-misoperation locking device of the grounding switch blade of the high-voltage switch cabinet by combining the five-prevention computer operation key comprises the following steps:
D1) inputting a corresponding operation sequence in the microcomputer five-prevention system and transmitting the operation sequence to the five-prevention key;
D2) the method comprises the steps of operating according to operation tickets item by item, and verifying the correctness of an operation sequence through a five-prevention key, wherein before a grounding switch blade is closed, the five-prevention key is inserted into the grounding switch blade of the high-voltage switch cabinet to display a microcomputer anti-misoperation locking device in an electrified mode, whether a line is electrified is verified, if no electricity exists, the operation is continued, if electricity exists, the operation is stopped, the reason is checked, after a fault is eliminated, the grounding switch blade of the high-voltage switch cabinet is electrified to display the microcomputer anti-misoperation locking device to display that the line is not electrified, and the operation is.
7. The microcomputer anti-misoperation locking method for the grounding switch blade of the high-voltage switch cabinet according to claim 5,
the use method of the microcomputer anti-misoperation locking device of the grounding switch blade of the high-voltage switch cabinet by combining the five-prevention computer operation key comprises the following steps:
D1) inputting a corresponding operation sequence in the microcomputer five-prevention system and transmitting the operation sequence to the five-prevention key;
D2) the method comprises the steps of operating according to operation tickets item by item, and verifying the correctness of an operation sequence through a five-prevention key, wherein before a grounding switch blade is closed, the five-prevention key is inserted into the grounding switch blade of the high-voltage switch cabinet to display a microcomputer anti-misoperation locking device in an electrified mode, whether a line is electrified is verified, if no electricity exists, the operation is continued, if electricity exists, the operation is stopped, the reason is checked, after a fault is eliminated, the grounding switch blade of the high-voltage switch cabinet is electrified to display the microcomputer anti-misoperation locking device to display that the line is not electrified, and the operation is.
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| CN111864616B (en) * | 2020-06-22 | 2022-07-12 | 深圳供电局有限公司 | Display device control circuit and five-prevention locking system |
| CN112433118B (en) * | 2020-11-16 | 2022-07-01 | 国网山东省电力公司聊城供电公司 | Anti-misoperation simulation device and method for 10kV medium-voltage power generation vehicle |
| CN114122931B (en) * | 2021-11-25 | 2024-03-12 | 山东舜凯电气设备有限公司 | Safety control device for safety test of electrical switch cabinet |
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