CN114172035A - Intelligent automatic voltage-boosting transformer without power failure of high-voltage line and control method thereof - Google Patents
Intelligent automatic voltage-boosting transformer without power failure of high-voltage line and control method thereof 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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/22—Layouts for duplicate bus-bar selection
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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
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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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
- H02B15/00—Supervisory desks or panels for centralised control or display
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an intelligent high-voltage line uninterrupted automatic boosting transformer and a control method thereof, comprising an AH1 power supply side incoming switch cabinet, an AH2 power supply side outgoing switch cabinet, an AH3 power supply side outgoing switch cabinet, an AH4 load side incoming switch cabinet, an AH5 load side incoming switch cabinet, an AH6 load side outgoing switch cabinet, a box body, a transformer, a three-phase on-load tap-changer and an intelligent voltage-regulating controller, wherein the AH1 power supply side incoming switch cabinet, the AH2 power supply side outgoing switch cabinet, the AH3 power supply side outgoing switch cabinet, an AH4 load side incoming switch cabinet, the AH5 load side incoming switch cabinet and the AH6 load side outgoing switch cabinet are fixedly installed in the box body sequentially through bolts from left to right, the transformer is fixedly installed in the box body through the bolts, through the integral installation of the switch cabinet, the installation strength is reduced, the integral protection grade of the equipment is also improved, and the protection grade reaches 67, each electric operating mechanism of accessible local mode or remote mode control carries out separating brake and combined floodgate operation to switchgear respectively, simultaneously, carry out the pressure regulating action through intelligent voltage regulation controller drive three-phase on-load tap-changer, when having realized that the low voltage state appears in the load side of transmission and distribution lines, can realize the voltage regulation operation of not having a power failure through local mode or remote mode, not only satisfy the requirement of electric wire netting company to the power supply reliability, realized the maneuverability of long-range fortune dimension, the degree of difficulty and the cost of fortune dimension have also been reduced.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an intelligent automatic voltage boosting transformer without power failure of a high-voltage line and a control method thereof.
Background
The traditional power transmission and distribution line voltage regulation scheme generally adopts a voltage regulating transformer installed on a platform, and can complete switching operation only by power failure when the voltage regulating scheme is put into operation, so that the requirement of a power grid company on the power supply reliability of a distribution line is not met; simultaneously, not only traditional scheme's the change that steps up needs the operation of overall process area load once put into operation, can accelerate equipment's ageing undoubtedly, shortens equipment life, also because the circuit span is big, has increased the degree of difficulty of tour, maintenance.
Disclosure of Invention
The invention aims to provide an intelligent automatic voltage-boosting transformer without power outage for a high-voltage line and a control method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: comprises an AH1 power supply side incoming line switch cabinet, an AH2 power supply side outgoing line switch cabinet, an AH3 power supply side outgoing line switch cabinet, an AH4 load side incoming line switch cabinet, an AH5 load side incoming line switch cabinet, an AH6 load side outgoing line switch cabinet, a box body, a transformer, a three-phase on-load tap-changer and an intelligent voltage-regulating controller, wherein the AH1 power supply side incoming line switch cabinet, the AH2 power supply side outgoing line switch cabinet, the AH3 power supply side outgoing line switch cabinet, an AH4 load side incoming line switch cabinet, the AH5 load side incoming line switch cabinet and an AH6 load side outgoing line switch cabinet are fixedly installed in the box body sequentially through bolts from left to right, the box body improves the whole protection grade of the equipment, the protection grade reaches IP67, the transformer is fixedly installed in the box body through bolts, a primary side three-phase winding of the transformer is connected with the three-phase on-load tap-load switch, a switching control line of the three-phase on-load tap-regulating switch is connected with the intelligent voltage-regulating controller, the intelligent voltage regulation controller is fixedly installed on the transformer through bolts.
The invention is further improved as follows:
further, female four branch roads of parallelly connected output of three-phase inlet wire in AH1 power supply side inlet wire cubical switchboard, HL1 signal pilot lamp is connected all the way to first, and control transformer and QF7 control electric breaker are connected in proper order to the second way, and FU1 fuse and PV1 voltmeter are connected in proper order to the third way, and F1 lightning arrester is connected to the fourth way, F1 lightning arrester output ground connection, female the three-phase inlet wire is arranged and is passed in proper order AH2 power supply side outlet wire cubical switchboard and AH3 power supply side outlet wire cubical switchboard, QF7 control electric breaker parallel connection first switching power supply and second switching power supply, control system power consumption and the effective isolation of primary system have been guaranteed to control electric transformer, have promoted the stability of control system power consumption.
Furthermore, the three-phase incoming busbar in the AH2 power supply side outgoing switch cabinet is sequentially connected with a QF1 air circuit breaker and a QS1 isolating switch, the QS1 isolating switch is connected with three output branches in parallel, the first branch is connected with an HL2 power signal indicator lamp, the second branch passes through a TA1 current transformer and then is connected with the primary side of the transformer, the third branch is connected with an F2 lightning arrester, and the output of the F2 lightning arrester is grounded.
Furthermore, the three-phase incoming line busbar in the AH3 power supply side outgoing line switch cabinet is sequentially connected with a QF2 air circuit breaker and a QS2 isolating switch, the QS2 isolating switch outputs two branches in parallel, the first branch is connected with an HL3 power signal indicator lamp, and the second branch passes through a TA2 current transformer and is connected to the three-phase outgoing line busbar in the AH4 load side incoming line switch cabinet.
Furthermore, in the AH4 load side inlet wire switch cabinet the three-phase outlet busbar is connected in parallel with two paths, the first path is connected with an HL4 power signal indicator lamp, the second path is connected to an FU2 fuse and a PV2 voltmeter in sequence, and the three-phase outlet busbar sequentially passes through the AH5 load side inlet wire switch cabinet and an AH6 load side outlet wire switch cabinet.
Furthermore, the three-phase outgoing line busbar in the AH5 load side incoming line switch cabinet is connected with a QS3 isolating switch, the QS3 isolating switch outputs three branches in parallel, the first branch is connected with an HL5 power signal indicator lamp, the second branch is connected with the secondary side of the transformer, the third branch is connected with an F3 lightning arrester, and the output of the F3 lightning arrester is grounded.
Furthermore, a three-phase outgoing line busbar in the AH6 load side outgoing line switch cabinet is sequentially connected with a QF4 air circuit breaker and a QS4 isolating switch, the QS4 isolating switch is connected with three output branches in parallel, the first branch is connected with an HL6 power signal indicator lamp, the second branch passes through a TA3 current transformer and then is connected with a load end, the third branch is connected with an F4 lightning arrester, the output of the F4 lightning arrester is grounded, and an intelligent electric wireless gateway and a programmable PLC (programmable logic controller) are installed in the AH6 load side outgoing line switch cabinet.
Furthermore, a QF1-M electric operating mechanism and a QS1-M electric operating mechanism are additionally arranged on the QF1 air circuit breaker and the QS1 isolating switch, and control coils of the QF1-M electric operating mechanism and the QS1-M electric operating mechanism are connected with output ports COM1 and COM2 of the programmable PLC controller and used for remotely controlling the QF1 air circuit breaker and the QS1 isolating switch to perform opening and closing actions.
Furthermore, a QF2-M electric operating mechanism and a QS2-M electric operating mechanism are additionally arranged on the QF2 air circuit breaker and the QS2 isolating switch, and control coils of the QF2-M electric operating mechanism and the QS2-M electric operating mechanism are connected with output ports COM3 and COM4 of the programmable PLC controller and used for remotely controlling the QF2 air circuit breaker and the QS2 isolating switch to perform opening and closing actions.
Furthermore, a QS3-M electric operating mechanism is additionally arranged on the QS3 isolating switch, and a control coil of the QS3-M electric operating mechanism is connected with an output port COM5 of the programmable PLC controller and is used for remotely controlling the QS3 isolating switch to perform opening and closing actions.
Furthermore, a QF4-M electric operating mechanism and a QS4-M electric operating mechanism are additionally arranged on the QF4 air circuit breaker and the QS4 isolating switch, and control coils of the QF4-M electric operating mechanism and the QS4-M electric operating mechanism are connected with output ports COM6 and COM7 of the programmable PLC controller and used for remotely controlling the QF4 air circuit breaker and the QS4 isolating switch to perform opening and closing actions.
Further, the first switch power output is connected in parallel with the intelligent voltage-regulating controller and the power intelligent wireless gateway for power supply of the intelligent voltage-regulating controller and the power intelligent wireless gateway, the second switch power output is connected in parallel with the programmable PLC controller, the QF1-M electric operating mechanism, the QS1-M electric operating mechanism, the QF2-M electric operating mechanism, the QS2-M electric operating mechanism, the QS3-M electric operating mechanism, the QF4-M electric operating mechanism and the QS4-M electric operating mechanism for power supply of the main motor circuits in the programmable PLC controller, the QF1-M electric operating mechanism, the QS1-M electric operating mechanism, the QF2-M electric operating mechanism, the QS2-M electric operating mechanism, the QS3-M electric operating mechanism, the QF4-M electric operating mechanism and the QS4-M electric operating mechanism, the intelligent voltage regulation controller and the programmable PLC are connected with the electric power intelligent wireless gateway through an RS485 protocol, so that wireless remote control is realized.
Furthermore, the three-phase voltage signal of the PV2 voltmeter is connected with the intelligent voltage regulation controller and is used for detecting the three-phase voltage value of the load side. When the power transmission and distribution line is in normal electricity utilization (no low-voltage state), the AH1 power supply side incoming line switch cabinet, AH3 power supply side outgoing line switch cabinet, AH4 load side incoming line switch cabinet and AH6 load side outgoing line switch cabinet normally work, the AH2 power supply side outgoing line switch cabinet and AH5 load side incoming line switch cabinet are in the disconnected state, the working mode of the intelligent voltage-regulating controller is set to be the local mode and the remote mode mixed mode, the intelligent voltage-regulating controller sets the voltage-regulating start-stop condition (the voltage threshold is V)SThe three-phase voltage value of the load side is V, and the starting conditions are as follows: when V < VSAnd duration t > t1The stop condition is that V > VSAnd duration t > t2) Original gear 1(1 bit) of the three-phase on-load tap-changerRatio of primary winding to secondary winding) when V < VSAnd duration t > t1When the three-phase three-load-side power supply system happens, the electric operation and maintenance cloud platform remotely controls the programmable PLC controller to send out control signals through the electric intelligent wireless gateway to enable the QF1-M electric operating mechanism, the QS1-M electric operating mechanism and the QS3-M electric operating mechanism to sequentially switch on the QF1 air circuit breaker, the QS1 isolating switch and the QS3 isolating switch and then control the QS2-M electric operating mechanism and the QF2-M electric operating mechanism to sequentially switch off the QS2 isolating switch and the QF2 air circuit breaker, at the moment, the AH1 power supply side inlet wire switch cabinet, the AH2 power supply side outlet side inlet wire switch cabinet, the transformer, the AH4 load side inlet wire switch cabinet, the transformer, the AH5 load wire switch cabinet and the AH6 load side outlet wire switch cabinet are in working states, the AH3 power supply side outlet switch cabinet is in a disconnected state, and then the electric operation and maintenance cloud platform remotely controls the intelligent voltage regulation controller to send out driving output signals to drive the three-phase three-load-phase three-load-phase three-load-phase three-load-phase three-load-phase three-load-phase three-phase three-load-three-phase three-load-phase three-phase three-load-phase three-phase three-phase three-phase three-phase three-three The tapping switch performs tapping switching action, the voltage of the secondary side is improved by reducing the number of turns of the primary side winding of the transformer, and when V is larger than V, the three-phase voltage value of the load side is compared with a voltage threshold valueSAnd duration t > t2And the voltage regulation process is completed, so that uninterrupted voltage regulation operation control is realized, when the power transmission and distribution line is recovered to be normal, the electric power operation and maintenance cloud platform remotely controls the intelligent voltage regulation controller to send a driving output signal to drive the three-phase on-load tap-changer to recover to the original gear 1, controls the QF2-M electric operating mechanism and the QS2-M electric operating mechanism to sequentially switch on the QF2 air circuit breaker and the QS2 isolating switch, and controls the QS3-M electric operating mechanism, the QS1-M electric operating mechanism and the QF1-M electric operating mechanism to sequentially switch off the QS3 isolating switch, the QS1 isolating switch and the QF1 air circuit breaker, so that the normal work of the AH1 power supply side inlet switch cabinet, the AH3 power supply side outlet switch cabinet, the AH4 side inlet load switch cabinet and the AH6 outlet switch cabinet is recovered, the AH2 power supply side outgoing line switch cabinet and the AH5 load side incoming line switch cabinet are in an off state, so that the loss of equipment is reduced, and the service life of the equipment is prolonged.
In summary, the intelligent uninterrupted automatic voltage-boosting transformer for the high-voltage line and the control method thereof have the following advantages:
the beneficial effects are that: through to cubical switchboard integral erection, not only reduced installation intensity, also promoted the holistic protection level of equipment, the protection level reaches IP 67.
Beneficial effects 2: when the low voltage state appears in the load side of transmission and distribution lines, can realize the voltage regulation operation of not having a power failure through local mode or remote mode, satisfy the requirement of electric wire netting company to the power supply reliability, simultaneously, the pilot lamp through the cubical switchboard shows that the state makes things convenient for operation and maintenance personnel to know whether equipment is in the voltage regulation state.
Beneficial effect 3: through intelligent wireless gateway and wireless network agreement, realize that electric power fortune dimension cloud platform monitors equipment data information, can not only carry out remote control to switchgear, realized the maneuverability of long-range electric power fortune dimension, reduced the degree of difficulty and the cost of fortune dimension.
Drawings
FIG. 1 is a schematic front view of the present invention
FIG. 2 is a schematic top view of the present invention
FIG. 3 is a schematic diagram of a primary system of the present invention
FIG. 4 is a schematic diagram of the control communication of the secondary system of the present invention
In FIGS. 1-4: an AH1 power supply side incoming line switch cabinet 1, an AH2 power supply side outgoing line switch cabinet 2, an AH3 power supply side outgoing line switch cabinet 3, an AH4 load side incoming line switch cabinet 4, an AH5 load side incoming line switch cabinet 5, an AH6 load side outgoing line switch cabinet 6, a box 7, a transformer 8, a three-phase on-load tap-changer 9, an intelligent voltage-regulating controller 10, a three-phase incoming line busbar 11, an HL1 power signal indicator lamp 12, a control transformer 13, a QF7 control electric circuit breaker 14, an FU1 fuse 15, a PV1 voltmeter 16, an F1 lightning protector 17, a first switching power supply 18, a second switching power supply 19, an QF1 air circuit breaker 20, a QS1 isolating switch 21, an HL2 power signal indicator lamp 22, a TA1 current transformer 23, an F2 current transformer 24, an HL2 air isolating switch 26, an QS2 power signal indicator lamp 26, a TA3 and a TA 362 current transformer 28, 29 is a three-phase outlet busbar, 30 is an HL4 power signal indicator light, 31 is an FU2 fuse, 32 is a PV2 voltmeter, 33 is an QS3 disconnecting switch, 34 is an HL5 power signal indicator light, 35 is an F3 lightning arrester, 36 is an QF4 air circuit breaker, 37 is an QS4 disconnecting switch, 38 is an HL6 power signal indicator light, 39 is a TA3 current transformer, 40 is an F4 lightning arrester, 41 is an electric power intelligent wireless gateway, 42 is a programmable PLC controller, 43 is an QF1-M electric operating mechanism, 44 is an QS1-M electric operating mechanism, 45 is an QF2-M electric operating mechanism, 46 is an QS2-M electric operating mechanism, 47 is an QS3-M electric operating mechanism, 48 is an QF4-M electric operating mechanism and 49 is an QS4-M electric operating mechanism
Detailed Description
As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the uninterrupted automatic step-up transformer for intelligent high-voltage line and the control method thereof comprise an AH1 power supply side incoming switch cabinet 1, an AH2 power supply side outgoing switch cabinet 2, an AH3 power supply side outgoing switch cabinet 3, an AH4 load side incoming switch cabinet 4, an AH5 load side incoming switch cabinet 5, an AH6 load side outgoing switch cabinet 6, a box body 7, a transformer 8, a three-phase on-load tap-changer 9 and an intelligent voltage-regulating controller 10, wherein the AH1 power supply side incoming switch cabinet 1, the AH2 power supply side outgoing switch cabinet 2, the AH3 power supply side outgoing switch cabinet 3, the AH4 load side incoming switch cabinet 4, the AH5 load side incoming switch cabinet 5 and the AH6 load side outgoing switch cabinet 6 are fixedly installed in the box body 7 by bolts sequentially, the box body 7 raises the overall protection level of the equipment, the protection level reaches IP67, the transformer 8 is fixedly installed in the box body 7 by bolts, transformer 7 once inclines three-phase winding to connect three-phase on-load tap-changer 9, three-phase on-load tap-changer 9's switching control line connects intelligent voltage regulation controller 10, intelligent voltage regulation controller 10 passes through on bolt fixed mounting transformer 7, four branch circuits of female 11 parallel output of three-phase inlet wire are arranged in AH1 power supply side inlet wire cubical switchboard 1, connect HL1 power signal pilot lamp 12 for the first way, control transformer 13 and QF7 control circuit breaker 14 are connected gradually to the second way, FU1 fuse 15 and PV1 voltmeter 16 are connected gradually to the third way, F1 lightning arrester 17 is connected to the fourth way, F1 lightning arrester 17 output ground connection, female 11 of three-phase inlet wire passes in proper order AH2 power supply side goes outThe line switch cabinet 2 and the AH3 power supply side outgoing line switch cabinet 3, the QF7 control electric breaker 14 is connected with the first switch power supply 18 and the second switch power supply 19 in parallel, the control electric transformer 13 ensures the effective isolation of the control system power consumption and the primary system power consumption, and improves the stability of the control system power consumption, the three-phase incoming line busbar 11 in the AH2 power supply side outgoing line switch cabinet 2 is sequentially connected with the QF1 air breaker 20 and the QS1 isolating switch 21, the QS1 isolating switch 21 outputs three branches in parallel, the first branch is connected with the HL2 power signal indicator lamp 22, the second branch passes through the TA1 current transformer 23 and is connected with the primary side of the transformer 8, the third branch is connected with the F2 lightning arrester 24, the F2 outputs the ground, the three-phase incoming line busbar 11 in the AH3 power supply side outgoing line switch cabinet 3 is sequentially connected with the QF2 air breaker 25 and the QS2, the 2 isolating switch 26 outputs two branches in parallel, the first path is connected with an HL3 power signal indicator lamp 27, the second path passes through a TA2 current transformer 28 and is connected with a three-phase outgoing line busbar 29 in an AH4 load side incoming line switch cabinet 4, the AH4 load side incoming line switch cabinet 4 is internally connected with the three-phase outgoing line busbar 29 in parallel, the first path is connected with an HL4 power signal indicator lamp 30, the second path is sequentially connected with an FU2 fuse 21 and a PV2 voltmeter 32, the three-phase outgoing line busbar 29 sequentially passes through the AH5 load side incoming line switch cabinet 5 and an AH6 load side outgoing line switch cabinet 6, the three-phase outgoing line busbar 29 in the AH5 load side incoming line switch cabinet 5 is connected with a QS3 isolating switch 33, the QS3 isolating switch 33 is connected with three branches in parallel, the first path is connected with the HL5 power signal indicator lamp 34, the second path is connected with the secondary side of the transformer 8, the third path is connected with an F3 device 35, the F3 device 35 is grounded, the output of the three-phase outgoing line busbar 29 in the AH6 load side outgoing line switch cabinet 6 is sequentially connected with a QF4 air circuit breaker 36 and a 4 air circuit 4 circuit breaker 36 An isolating switch 37, wherein the QS4 isolating switch 37 outputs three branches in parallel, the first branch is connected with an HL6 power signal indicator light 38, the second branch passes through a TA3 current transformer 39 and then is connected with a load end, the third branch is connected with an F4 lightning arrester 40, the output of the F4 lightning arrester 40 is grounded, an intelligent wireless gateway 41 and a programmable PLC (programmable logic controller) 42 are installed in an AH6 load side outlet switch cabinet 6, and QF1 air circuit breaker 20 and a QS1 isolating switch 21 are additionally provided with a QF1-M electric operating mechanism 43 and a QS1-M electric operating mechanism 44, the control coils of the QF1-M electric operating mechanism 43 and the QS1-M electric operating mechanism 44 are connected with the output ports COM1 and COM2 of the programmable PLC controller 42 and are used for remotely controlling the QF1 air circuit breaker 20 and the QS1 disconnecting switch 21 to perform opening and closing actions, the QF2 air circuit breaker 25 and the QS2 disconnecting switch 26 are additionally provided with a QF2-M electric operating mechanism 45 and a QS2-M electric operating mechanism 46, the QF2-M electric operating mechanism 45 and a QS2-M electric operating mechanism 46 are connected with the control coils of the output ports COM3 and COM4 of the programmable PLC controller 42 and are used for remotely controlling the QF2 air circuit breaker 25 and the QS2 disconnecting switch 26 to perform opening and closing actions, the QS3 disconnecting switch 33 is additionally provided with a 3-M electric operating mechanism 47, the control coil of the QF 3-M electric operating mechanism 47 is connected with the output port COM5 of the programmable PLC controller 42, the QF4 air circuit breaker 36 and the QS4 isolating switch 37 are additionally provided with a QF4-M electric operating mechanism 48 and a QS4-M electric operating mechanism 49, control coils of the QF4-M electric operating mechanism 48 and the QS4-M electric operating mechanism 49 are connected with an output port COM6 and a COM7 of the programmable PLC 42 and are used for remotely controlling the QF4 air circuit breaker 36 and the QS4 isolating switch 37 to perform opening and closing actions, the output of the first switching power supply 18 is connected with the intelligent voltage regulating controller 10 and the intelligent power wireless gateway 41 in parallel and is used for supplying power to the intelligent voltage regulating controller 10 and the intelligent power wireless gateway 41, the output of the second switching power supply 19 is connected with the programmable PLC 42, the QF1-M electric operating mechanism 43, the QS1-M electric operating mechanism 44, the QS1-M electric operating mechanism 44 in parallel, QF2-M electric operating mechanism 45, QS2-M electric operating mechanism 4+, QS3-M electric operating mechanism 47, QF4-M electric operating mechanism 48 and QS4-M electric operating mechanism 49, which are used for supplying power to motor main circuits in the programmable PLC controller 42, the QF1-M electric operating mechanism 43, the QS1-M electric operating mechanism 44, the QF2-M electric operating mechanism 45, the QS2-M electric operating mechanism 46, the QS3-M electric operating mechanism 47, the QF4-M electric operating mechanism 48 and the QS4-M electric operating mechanism 49, the intelligent voltage regulating controller 10 and the programmable PLC controller 42 are connected with the power intelligent wireless gateway 41 through RS485 protocol so as to realize wireless remote control, and the three-phase voltage signal of the PV2 meter 32 is connected with the power intelligent wireless gateway 41 to realize wireless remote controlThe intelligent voltage regulating controller 10 is used for detecting three-phase voltage values of a load side. When the power transmission and distribution line is in normal electricity utilization (no low-voltage state), the AH1 power supply side incoming line switch cabinet 1, the AH3 power supply side outgoing line switch cabinet 3, the AH4 load side incoming line switch cabinet 4 and the AH6 load side outgoing line switch cabinet 6 work normally, the AH2 power supply side outgoing line switch cabinet 2 and the AH5 load side incoming line switch cabinet 5 are in a disconnected state, the working mode of the intelligent voltage-regulating controller 10 is set to be a local mode and a remote mode mixed mode, and the intelligent voltage-regulating controller 10 sets a voltage-regulating start-stop condition (the voltage threshold is V)SThe three-phase voltage value of the load side is V, and the starting conditions are as follows: when V < VSAnd duration t > t1The stop condition is that V > VSAnd duration t > t2) The three-phase on-load tap-changer 9 has the original gear 1 (the ratio of the primary side winding to the secondary side winding of 1 bit), when V is less than VSAnd duration t > t1When the power operation and maintenance cloud platform happens, the power operation and maintenance cloud platform remotely controls the programmable PLC controller 42 to send out control signals through the power intelligent wireless gateway 41 so that the QF1-M electric operating mechanism 43, the QS1-M electric operating mechanism 44 and the QS3-M electric operating mechanism 47 sequentially close the QF1 air circuit breaker 20, the QS1 and the QS3 disconnecting switch 33, and then controls the QS2-M electric operating mechanism 46 and the QF2-M electric operating mechanism 45 to sequentially open the QS2 disconnecting switch 26 and the QF2 air circuit breaker 25, wherein the AH1 power supply side inlet switch cabinet 1, the AH2 power supply side outlet switch cabinet 2, the AH4 load side inlet switch cabinet 4, the transformer 8, the AH5 load line switch cabinet 5 and the AH6 load side outlet switch cabinet 6 are in a working state, and the AH3 power supply side outlet switch cabinet 3 is in a disconnected state, the electric power operation and maintenance cloud platform remotely controls the intelligent voltage regulation controller 10 to send a driving output signal to drive the three-phase on-load tap-changer 9 to perform tap switching action, the number of turns of a primary side winding of the transformer 8 is reduced to improve the secondary side voltage, and when V is larger than V, the three-phase voltage value of the load side is compared with a voltage threshold valueSAnd duration t > t2And the voltage regulating process is completed, so that the uninterrupted voltage regulating operation control is realized, and when the power utilization of the power transmission and distribution line is recovered to be normal, the power transmission and distribution line is operatedThe electric operation and maintenance cloud platform remotely controls the intelligent voltage regulation controller 10 to send a driving output signal to drive the three-phase on-load tap-changer 9 to return to the original gear 1, controls the QF2-M electric operating mechanism 45 and the QS2-M electric operating mechanism 46 to sequentially switch on the QF2 air circuit breaker 25 and the QS2 disconnecting switch 26, and controls the QS3-M electric operating mechanism 47, the QS1-M electric operating mechanism 44 and the QF1-M electric operating mechanism 43 to sequentially switch off the QS3 disconnecting switch 33, the QS1 disconnecting switch 21 and the QF1 air circuit breaker 20 so as to return to the normally working state of the AH1 power supply side inlet switch cabinet 1, the AH3 power supply side outlet switch cabinet 3, the AH4 load side inlet switch cabinet 4 and the AH6 load side outlet switch cabinet 6, and returns to the AH2 power supply side outlet switch cabinet AH2 and AH5 load side inlet switch cabinet 5 in the disconnected state, the loss of equipment is reduced, and the service life of the equipment is prolonged.
Claims (13)
1. An intelligent high-voltage line uninterrupted automatic voltage-boosting transformer and a control method thereof are characterized by comprising an AH1 power supply side incoming switch cabinet, an AH2 power supply side outgoing switch cabinet, an AH3 power supply side outgoing switch cabinet, an AH4 load side incoming switch cabinet, an AH5 load side incoming switch cabinet, an AH6 load side outgoing switch cabinet, a box body, a transformer, a three-phase on-load tap-changer and an intelligent voltage-regulating controller, wherein the AH1 power supply side incoming switch cabinet, the AH2 power supply side outgoing switch cabinet, the AH3 power supply side outgoing switch cabinet, the AH4 load side incoming switch cabinet, the AH5 load side incoming switch cabinet and the AH6 load side outgoing switch cabinet are fixedly installed in the box body through bolts sequentially from left to right, the transformer is fixedly installed in the box body through the bolts, a primary side three-phase winding of the transformer is connected with the three-phase on-load tap-changer, a switching control line of the three-phase on-load tap-changer is connected with the intelligent voltage-regulating controller, the intelligent voltage regulation controller is fixedly installed on the transformer through bolts.
2. An intelligent uninterrupted automatic voltage boosting transformer for high-voltage line and its control method as claimed in claim 1, wherein said three-phase incoming busbar in said AH1 power-supply side incoming switch cabinet is connected in parallel to output four branches, the first branch is connected to HL1 power signal indicator lamp, the second branch is connected in turn to control transformer and QF7 control circuit breaker, the third branch is connected in turn to FU1 fuse and PV1 voltmeter, the fourth branch is connected to F1 lightning arrester, said F1 lightning arrester output is grounded, said three-phase incoming busbar passes through said AH2 power-supply side outgoing switch cabinet and AH3 power-supply side outgoing switch cabinet in turn, said QF7 control circuit breaker is connected in parallel to first switching power supply and second switching power supply.
3. The uninterrupted automatic voltage boosting transformer of an intelligent high-voltage line as claimed in claim 1, wherein said three-phase incoming busbar in said AH2 power-supply side outgoing switch cabinet is sequentially connected to QF1 air circuit breaker and QS1 isolating switch, said QS1 isolating switch outputs three branches in parallel, the first branch is connected to HL2 power signal indicator lamp, the second branch passes through TA1 current transformer and then is connected to the primary side of said transformer, the third branch is connected to F2 lightning protector, and the output of said F2 lightning protector is grounded.
4. The uninterrupted automatic boosting transformer of the intelligent high-voltage line as claimed in claim 1, wherein said three-phase incoming busbar in said AH3 power-supply side outgoing line switch cabinet is sequentially connected to QF2 air circuit breaker and QS2 isolating switch, said QS2 isolating switch outputs two branches in parallel, the first branch is connected to HL3 power signal indicator lamp, the second branch passes through TA2 current transformer and is connected to said three-phase outgoing busbar in AH4 load side incoming line switch cabinet.
5. An intelligent uninterrupted automatic voltage boosting transformer for high-voltage line as claimed in claim 1, wherein said three-phase outgoing line busbar in said AH4 load side incoming line switch cabinet is connected in parallel two ways, the first way is connected to HL4 power signal indicator lamp, the second way is connected to FU2 fuse and PV2 voltmeter in turn, said three-phase outgoing line busbar passes through said AH5 load side incoming line switch cabinet and AH6 load side outgoing line switch cabinet in turn.
6. An intelligent high-voltage line uninterrupted automatic voltage boosting transformer and a control method thereof as claimed in claim 1, characterized in that said three-phase outgoing line busbar in said AH5 load side incoming line switch cabinet is connected with QS3 isolating switch, said QS3 isolating switch is connected in parallel to output three branches, the first branch is connected with HL5 power signal indicator, the second branch is connected with the secondary side of transformer, the third branch is connected with F3 lightning protector, and said F3 lightning protector outputs ground.
7. The uninterrupted automatic voltage boosting transformer of the intelligent high-voltage line as claimed in claim 1, characterized in that said three-phase outgoing busbar in said AH6 load side outgoing switch cabinet is connected in turn with QF4 air circuit breaker and QS4 isolating switch, said QS4 isolating switch outputs three branches in parallel, the first branch is connected with HL6 power signal indicator, the second branch passes through TA3 current transformer and then is connected with load end, the third branch is connected with F4 lightning arrester, said F4 lightning arrester outputs ground, said AH6 load side outgoing switch cabinet installs electric intelligent wireless gateway and programmable PLC controller.
8. An intelligent uninterrupted automatic voltage boosting transformer of a high-voltage line and a control method thereof as claimed in claim 3, wherein the QF1 air circuit breaker and the QS1 isolating switch are additionally provided with a QF1-M electric operating mechanism and a QS1-M electric operating mechanism, and control coils of the QF1-M electric operating mechanism and the QS1-M electric operating mechanism are connected with output ports COM1 and COM2 of the programmable PLC controller.
9. An intelligent uninterrupted automatic voltage boosting transformer of a high-voltage line and a control method thereof as claimed in claim 4, wherein the QF2 air circuit breaker and QS2 isolating switch are additionally provided with a QF2-M electric operating mechanism and a QS2-M electric operating mechanism, and control coils of the QF2-M electric operating mechanism and the QS2-M electric operating mechanism are connected with output ports COM3 and COM4 of the programmable PLC controller.
10. The uninterrupted automatic voltage boosting transformer of the intelligent high-voltage line and the control method thereof as claimed in claim 6, wherein the QS3 isolating switch is additionally provided with a QS3-M electric operating mechanism, and a control coil of the QS3-M electric operating mechanism is connected with the output port COM5 of the programmable PLC controller.
11. An intelligent uninterrupted automatic voltage boosting transformer of a high-voltage line and a control method thereof as claimed in claim 7, wherein the QF4 air circuit breaker and the QS4 isolating switch are additionally provided with a QF4-M electric operating mechanism and a QS4-M electric operating mechanism, and control coils of the QF4-M electric operating mechanism and the QS4-M electric operating mechanism are connected with output ports COM6 and COM7 of the programmable PLC controller.
12. The uninterrupted automatic voltage-boosting transformer of the intelligent high-voltage line and the control method thereof as claimed in claim 2, wherein the first switching power output is connected in parallel with the intelligent voltage-regulating controller and the intelligent wireless gateway of the electric power, the second switching power output is connected in parallel with the programmable PLC controller, the QF1-M electric operating mechanism, the QS1-M electric operating mechanism, the QF2-M electric operating mechanism, the QS2-M electric operating mechanism, the QS3-M electric operating mechanism, the QF4-M electric operating mechanism and the QS4-M electric operating mechanism, and the intelligent voltage-regulating controller and the programmable PLC controller are connected with the intelligent wireless gateway of the electric power through RS485 protocol.
13. The intelligent uninterrupted automatic step-up transformer for the high-voltage line and the control method thereof as claimed in claim 5, wherein the three-phase voltage signal of the PV2 voltmeter is connected with the intelligent voltage-regulating controller.
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| CN202111491054.9A CN114172035A (en) | 2021-12-08 | 2021-12-08 | Intelligent automatic voltage-boosting transformer without power failure of high-voltage line and control method thereof |
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| CN202111491054.9A CN114172035A (en) | 2021-12-08 | 2021-12-08 | Intelligent automatic voltage-boosting transformer without power failure of high-voltage line and control method thereof |
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