CN113809731B - Intelligent DC bus and feeder system of transformer substation - Google Patents
Intelligent DC bus and feeder system of transformer substation Download PDFInfo
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- CN113809731B CN113809731B CN202010552056.3A CN202010552056A CN113809731B CN 113809731 B CN113809731 B CN 113809731B CN 202010552056 A CN202010552056 A CN 202010552056A CN 113809731 B CN113809731 B CN 113809731B
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- 238000012806 monitoring device Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 53
- 238000000926 separation method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 11
- 230000008901 benefit Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
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Classifications
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J1/086—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load or loads and source or sources when the main path fails
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/266—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving switching on a spare supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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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
- H02J13/00002—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 monitoring
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a direct-current intelligent bus and feeder system of a transformer substation, which comprises a power supply unit, a first auxiliary bus and a second auxiliary bus, wherein the power supply unit comprises a plurality of intelligent switches connected in parallel, a load connected with the intelligent switches, a controller for controlling the intelligent switches to act, and an intelligent monitoring device connected with the controller, the first auxiliary bus and the first auxiliary bus are both connected with the intelligent switches, and the intelligent monitoring device monitors the state of the power supply unit and controls the disconnection and the passage of the intelligent switches, the first auxiliary bus and the first auxiliary bus through the controller; when the direct current system is grounded, the grounding bus can be quickly and automatically switched to the standby bus, and when the original bus fails, the standby bus can automatically pass through a continuous power supply to the feeder line; the intelligent switch is arranged so that the switching sequence of the power supply is firstly switched on and then switched off, and the switching process cannot be powered off.
Description
Technical Field
The invention relates to the field of direct-current power supply systems, in particular to a direct-current intelligent bus and feeder system of a transformer substation.
Background
The feeder unit of the direct current system consists of a bus and a plurality of feeder air switches, and the operation reliability of the whole direct current system can be affected as long as insulation reduction or grounding occurs to a certain feeder branch in the operation, so that the problems of misoperation, refusal operation, air switch tripping and the like of the protection device can be caused. And when the bus fails, such as bus voltage loss and short circuit, all direct current loads can lose voltage. Even a system with double-set configuration is affected by the field environment, the ground fault cannot be completely isolated, and a person on duty is required to go to the field for switching operation, so that a long time is required, and the safe operation of the direct current system is not facilitated. In the prior art, the safe operation of the whole direct current system can be influenced only if insulation reduction or grounding occurs to a feeder branch in operation, and the bus faults cause the voltage loss of all direct current loads and can not quickly recover power transmission.
Disclosure of Invention
This section is intended to summarize some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, which may be simplified or omitted from the present section and description abstract and title of the application to avoid obscuring the objects of this section, description abstract and title, and which is not intended to limit the scope of this invention.
The present invention has been made in view of the above and/or problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that the safe operation of the whole direct current system can be influenced as long as insulation reduction or grounding occurs to a certain feeder line branch in operation, the bus faults cause voltage loss of all direct current loads, and power transmission cannot be quickly recovered.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a transformer substation direct current intelligent bus and feeder system, includes, power supply unit, including first regular bus and first reserve bus, control unit, including a plurality of parallelly connected intelligent switch, with the load that intelligent switch is connected, control the controller of intelligent switch action, and with the intelligent monitoring device that the controller is connected, first regular bus and first reserve bus all with intelligent switch connects, the intelligent monitoring device monitors power supply unit's state, and through the controller control intelligent switch with circuit break and the passageway of first regular bus, first reserve bus.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the power supply unit further comprises a second conventional bus and a second standby bus, the first conventional bus is connected with the second standby bus through a first direct current chopper, the second conventional bus is connected with the first standby bus through a second direct current chopper, and the second conventional bus and the second standby bus are connected with a plurality of intelligent switches.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the intelligent switch comprises a circuit breaking assembly, a first switch, a second switch, a fixed plate and a mounting plate, wherein the mounting plate is connected with the fixed plate, the first switch and the second switch are arranged on the fixed plate side by side, the first switch area is divided into a first body and a first push rod, the second switch area is divided into a second body and a second push rod, the mounting plate is provided with a conversion assembly, a plurality of first switches are connected with a first conventional bus and a second conventional bus, and a plurality of second switches are connected with a first standby bus and a second standby bus; the conversion assembly comprises a first stirring piece and a second stirring piece which are positioned on the mounting plate, and an adjusting assembly which is simultaneously connected with the first stirring piece and the second stirring piece; the outer end of the first push rod is embedded in the first stirring piece, and the outer end of the second push rod is embedded in the second stirring piece.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the adjusting component comprises an incomplete gear, a first rack meshed with the incomplete gear, a second rack meshed with the incomplete gear, a first connecting piece hinged with the first rack and a second connecting piece hinged with the second rack, wherein the incomplete gear is located on the mounting plate, the incomplete gear comprises a tooth surface and a smooth surface, the length of the smooth surface is larger than that of the tooth surface, the first connecting piece is connected to the first stirring piece, the second connecting piece is connected to the second connecting piece, and the first rack and the second rack are arranged in parallel.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the first stirring piece comprises a first bayonet and a first stirring block, the second stirring piece comprises a second bayonet and a second stirring block, the first push rod is embedded in the first bayonet, the second push rod is embedded in the second bayonet, the first stirring block is connected with a first rotating piece, the second stirring piece is connected with a second rotating piece, the first connecting piece is divided into a first hinge end and a first sliding end, and the second connecting piece is divided into a second hinge end and a second sliding end; the first hinge end is hinged with the first rack, the first sliding end is inserted into the first rotating piece and slides, the second hinge end is hinged with the second rack, and the second sliding end is inserted into the second rotating piece and slides.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the mounting plate is provided with a sliding groove and guide grooves positioned on two sides of the sliding groove, and the first bayonet and the second bayonet are positioned in the corresponding sliding grooves.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the two ends of the first stirring block are provided with first guide posts which are embedded in the guide grooves; the second toggle block is provided with second guide posts at two ends, and the second guide posts are embedded in the guide grooves.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the mounting plate is also connected with a first rotating support and a second rotating support, the first rotating support and the second rotating support are symmetrically arranged on two sides of the incomplete gear, the first connecting piece penetrates through the first rotating support, and the second connecting piece penetrates through the second rotating support.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the mounting plate is also connected with two sliding rods, a first sliding hole is formed in the first rack along the moving direction, a second sliding hole is formed in the second rack along the moving direction, and the sliding rods respectively penetrate through the first sliding hole and the second sliding hole.
As a preferable scheme of the direct-current intelligent bus and feeder system of the transformer substation, the invention comprises the following steps: the utility model discloses a gear, including incomplete gear, mounting panel, arc groove, spacing post is provided with to the one side of incomplete gear with the mounting panel contact, the mounting panel with the one side of incomplete gear contact is provided with the arc groove, spacing post is in slide in the arc groove.
The invention has the beneficial effects that: when the direct current system is grounded, the backup bus can be used for automatically switching the grounding bus to the backup bus, and the grounding fault is automatically isolated and operated, and when the original bus is in fault, the backup bus can automatically pass through a continuous power supply to the feeder. The scheme greatly improves the power supply reliability and flexibility of the direct-current power supply system of the transformer substation, and the intelligent switch is arranged so that the switching sequence of the power supplies is firstly switched on and then switched off (different from a conventional double-power-supply switcher), namely, the standby power supply is firstly switched on and then switched off when the main power supply is switched on and standby, and the switching process is ensured not to lose power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic circuit diagram of a system in a dc intelligent busbar and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of another dc intelligent bus and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an intelligent switch in a dc intelligent bus and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of connection between a toggle member and a push rod in a dc intelligent busbar and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 5 is an explosion structure schematic diagram of an intelligent switch in a dc intelligent bus and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a mounting plate in a dc intelligent busbar and feeder system of a substation according to an embodiment of the present invention;
fig. 7 is a front view of a smart switch in a dc intelligent bus and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of incomplete gear engagement in a dc intelligent busbar and feeder system of a substation according to an embodiment of the present invention;
fig. 9 is a schematic side view structure of an intelligent switch in a dc intelligent bus and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a substation direct current intelligent busbar and feeder system with a first switch closed and a second switch opened in an initial state according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a first switch being closed and a second switch being closed in a switching process in a dc intelligent busbar and feeder system of a transformer substation according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a structure in which a switching process in a dc intelligent bus and feeder system of a transformer substation is completed, and a first switch is opened and a second switch is closed according to an embodiment of the present invention;
fig. 13 is a schematic diagram of a partial amplification of a separation component in a dc intelligent busbar and feeder system of a substation according to an embodiment of the present invention;
fig. 14 is a schematic cross-sectional structure of a separation component in a dc intelligent busbar and feeder system of a substation according to an embodiment of the present invention.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
In the following detailed description of the embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the invention is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Further still, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1, the present embodiment provides a dc intelligent bus and feeder system for a transformer substation, including a power supply unit 100, including a first regular bus 101 and a first standby bus 102, where two power input ends are connected to the first regular bus 101 and the first standby bus 102 respectively, during normal operation, so that a dc load of the feeder runs on the first regular bus 101, and a power is distributed to each branch through a control unit 200, where the control unit 200 includes a plurality of parallel intelligent switches 201, a load 202 connected to the intelligent switches 201, a controller 203 for controlling the actions of the intelligent switches 201, and an intelligent monitoring device 204 connected to the controller 203, where the load 202 is an output end of the feeder. The function of the intelligent switch 201 is different from that of a common dual-power switch, when one of the first regular bus 101 and the first standby bus 102 has a problem, the power supply can be automatically switched to the other path, and the switching sequence is firstly on and then off, namely, in the embodiment, the power supply of the first regular bus 102 is firstly on and then off, so that the switching process is ensured not to lose power, the first regular bus 101 and the first standby bus 102 are both connected with the intelligent switch 201, the intelligent monitoring device 204 monitors the state of the power supply unit 100, and the controller 203 controls the disconnection and the access of the intelligent switch 201, the first regular bus 101 and the first standby bus 102.
The controller 203 may select a motor, send a related command to the motor through the intelligent monitoring device 204 to change the state of the intelligent switch 201, where the intelligent monitoring device 204 is an intelligent insulation monitoring device, which is not described in detail herein, and if two-stage equivalent resistance grounding occurs, the intelligent monitoring device 204 sequentially switches all feeder branches according to a sequence until a grounding branch is found.
Example 2
Referring to fig. 2, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: the power supply unit 100 further comprises a second regular bus 103 and a second standby bus 104, the first regular bus 101 is connected with the second standby bus 104 through a first direct current chopper 105, the second regular bus 103 is connected with the first standby bus 102 through a second direct current chopper 106, and the second regular bus 103 and the second standby bus 104 are connected with a plurality of intelligent switches 201. The first DC chopper 105 and the second DC chopper 106 are DC/DC converters, and are voltage converters for effectively outputting a fixed voltage after converting an input voltage, and are used for isolating a DC ground fault point from a standby power supply by using the original power supply of the first conventional bus 101 and the first standby bus 102, and then forming a new power supply completely isolated from the original system after isolating by the DC chopper.
In this embodiment, the dc ground fault can be automatically and rapidly isolated, so as to ensure the safe operation of the dc system, and the automatic dual-power switching is realized by the intelligent switch 201, and the switching process does not lose voltage.
Example 3
Referring to fig. 1 to 12, a third embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: in the above embodiment, the intelligent switch 201 includes a circuit breaking assembly 300 and a converting assembly 400, specifically, the circuit breaking assembly 300 provides two power sources for a circuit, including a first switch 301 and a second switch 302, a fixing plate 303, and a mounting plate 304 connected to the fixing plate 303, where the first switch 301 and the second switch 302 control whether the power sources are turned on, and are selected as a common air switch, the first switch 301 and the second switch 302 are mounted on the fixing plate 303 side by side, the first switch 301 is divided into a first body 301a and a first push rod 301b, the second switch 302 is divided into a second body 302a and a second push rod 302b, in the prior art, whether the power sources are connected is controlled by toggling the position of the push rod, in this embodiment, the fixing plate 303 is connected to the mounting plate 304 by a bolt, and the converting assembly 400 is disposed on the mounting plate 304; the switching assembly 400 avoids the operation of the first switch 301 and the second switch 302 separately, affects the operation of a circuit, and can complete the opening and closing of the first switch 301 and the second switch 302 only by operating the switching assembly 400 separately, wherein the switching assembly 400 comprises a first stirring piece 401 and a second stirring piece 402 which are positioned on a mounting plate 304, and an adjusting assembly 403 which is connected with the first stirring piece 401 and the second stirring piece 402 at the same time; the first stirring piece 401 and the second stirring piece 402 have the same structure, the outer end of the first push rod 301b is embedded in the first stirring piece 401, when the first stirring piece 401 moves on the mounting plate 304, the first push rod 301b is carried to move simultaneously, the outer end of the second push rod 302b is embedded in the second stirring piece 402, and similarly, when the second stirring piece 402 moves on the mounting plate 304, the angle of the second push rod 302b is controlled. Preferably, the adjusting component 403 is an incomplete gear, and the first stirring member 401 and the second stirring member 402 are both connected with racks, when the incomplete gear rotates, the incomplete gear firstly meshes with one of the racks, when the meshing is finished, the push rod of the first switch just changes state, and when the incomplete gear continues to rotate, the incomplete gear meshes with the other rack, so that the state of the other switch is changed.
Further, the adjusting assembly 403 includes an incomplete gear 403a disposed on the mounting plate 304, a first rack 403b engaged with the incomplete gear 403a, a second rack 403c engaged with the incomplete gear 403a, a first link 403d hinged with the first rack 403b, and a second link 403e hinged with the second rack 403c, the shaft of the incomplete gear 403a being disposed on the mounting plate 304, the first rack 403b being disposed parallel to the second rack 403 c.
The incomplete gear 403a includes a tooth face 403a-1 and a smooth face 403a-2, and the length of the smooth face 403a-2 is greater than the length of the tooth face 403a-1, so that the tooth face 403a-1 does not engage with the tooth face 403a-1 when engaged with one of the first and second racks 403b and 403c, and is just capable of engaging with the other rack when the tooth face 403a-1 is disengaged from the engagement with one of the racks, which has the advantage that the first and second racks 403b and 403c cannot simultaneously engage with the incomplete gear 403a, and thus the states of the first and second switches 301 and 302 cannot be simultaneously changed, and the state of the second switch can be changed only after the state of the first switch is changed.
Further, the first connecting member 403d is connected to the first toggle member 401, the second connecting member 403e is connected to the second connecting member 403e, the first connecting member 403d transmits the motion of the first rack 403b to the first toggle member 401, and the second connecting member 403e transmits the motion of the second rack 403c to the second toggle member 402. Specifically, the first stirring member 401 includes a first bayonet 401a and a first stirring block 401b, the first bayonet 401a is in a U shape, the first stirring block 401b is located on the same side with the incomplete gear 403a, the U-shaped bifurcation of the first bayonet 401a places the first push rod 301b therein, when the first bayonet 401a moves, the first push rod 301b is stirred to change the state of the air switch, and similarly, the second stirring member 402 includes a second bayonet 402a and a second stirring block 402b, the action principle of which is the same as that of the first stirring block 401b, the first push rod 301b is embedded in the first bayonet 401a, and the second push rod 302b is embedded in the second bayonet 402 a;
further, the first stirring block 401b is connected with a first rotating member 404, the second stirring block 402b is connected with a second rotating member 405, the first rotating member 404 is hinged at the central position of the first stirring block 401b, that is, the first rotating member 404 can rotate on the first stirring block 401b, likewise, the second rotating member 405 is hinged at the central position of the second stirring block 402b, and holes are arranged on the first rotating member 404 and the second rotating member 405; the first connecting piece 403d and the second connecting piece 403e are in a round bar shape, the first connecting piece 403d is divided into a first hinge end 403d-1 and a first sliding end 403d-2, and the second connecting piece 403e is divided into a second hinge end 403e-1 and a second sliding end 403e-2; the first hinge end 403d-1 is hinged to the first rack 403b, the first slide end 403d-2 is inserted into the first rotating member 404 and slides, the second hinge end 403e-1 is hinged to the second rack 403c, and the second slide end 403e-2 is inserted into the second rotating member 405 and slides, that is, when the first rack 403b moves, the moving direction of the first toggle block 401b is opposite to that of the first rotating member, and when the second rack 403c moves, the moving direction of the second toggle block 402b is opposite to that of the second rotating member; preferably, the mounting plate 304 is provided with a sliding groove 304a and guide grooves 304b positioned at two sides of the sliding groove 304a, the first bayonet 401a and the second bayonet 402a are positioned in the corresponding sliding groove 304a, two ends of the first poking block 401b are provided with first guide posts 401c, and the first guide posts 401c are embedded in the guide grooves 304 b; the second toggle block 402b is provided with a second guide post 402c at two ends, the second guide post 402c is embedded in the guide groove 304b, when the first bayonet 401a and the second bayonet 402a move in the sliding groove 304a, the corresponding first push rod 301b and second push rod 302b are driven to change states, and the first guide post 401c and the second guide post 402c are located in the guide groove 304b to be offset.
Further, the mounting plate 304 is further connected with a first rotating bracket 406 and a second rotating bracket 407, where the first rotating bracket 406 and the second rotating bracket 407 serve as rotating fulcra of the first connecting piece 403d and the second connecting piece 403e, that is, the first connecting piece 403d and the second connecting piece 403e rotate around the first rotating bracket 406 and the second rotating bracket 407 respectively, the first rotating bracket 406 and the second rotating bracket 407 are symmetrically disposed on two sides of the incomplete gear 403a, the first connecting piece 403d passes through the first rotating bracket 406, and the second connecting piece 403e passes through the second rotating bracket 407.
Further, in order to make the two racks move more stably, the mounting plate 304 is further connected with two sliding rods 408, the sliding rods 408 are fixed on the mounting plate 304 and are symmetrically placed in parallel, a first sliding hole 403b-1 is formed in the first rack 403b along the moving direction, a second sliding hole 403c-1 is formed in the second rack 403c along the moving direction, and the sliding rods 408 respectively pass through the first sliding hole 403b-1 and the second sliding hole 403c-1.
Preferably, a limit post 403a-3 is disposed on a surface of the incomplete gear 403a, which contacts the mounting plate 304, an arc-shaped slot 304d is disposed on a surface of the mounting plate 304, which contacts the incomplete gear 403a, the limit post 403a-3 slides in the arc-shaped slot 304d, wherein the arc-shaped slot 304d has a length just enough to enable the rotation angle of the tooth surface 403a-1 to engage with the first rack 403b and then engage with the second rack 403c, i.e. the rotation angle in the arc-shaped slot 304d is limited.
The implementation manner of this example is as follows: in the circuit, the primary power source is set to be connected to the first switch 301, the standby power source is set to be connected to the second switch 302, referring to fig. 10 to 12, in the initial state, the first switch 301 is powered on, the second switch 302 is in the off state, that is, the positions of the first push rod 301b and the second push rod 302b are opposite, in this case, if the circuit needs to be disconnected from the first switch 301, the second switch 302 is connected and the switching cannot be interrupted, the process can be completed through the incomplete gear 403a, the circuit connected to the second switch 302 is needed to be first, the incomplete gear 403a is rotated, the limit post 403a-3 starts to move from one end of the arc-shaped groove 304d, the tooth surface 403a-1 starts to mesh with the second rack 403c, and the surface contacted with the first rack 403b is the smooth surface 403a-2, so that the first rack 403b is not moving, the second rack 403c starts to move, the second connecting member 403e connected to the second rack 403c starts to rotate around the second rotating bracket 407, the second sliding end 403e-2 pushes the second rotating member 405 to move, and the second rotating member 405 is connected to the second stirring block 402b, the second stirring block 402b is connected to the second bayonet 402a, such that the moving direction of the second stirring member 402 is opposite to the moving direction of the second rack 403c, the second stirring member 402 moves in the sliding slot 304a, the second bayonet 402a stirs the second push rod 302b to switch the state of the second switch 302 into the path, at this time, the tooth surface 403a-1 just breaks away from the second rack 403c and starts to mesh with the first rack 403b, the second rack 403c stops moving, the first rack 403b starts to move, and the principle is the same as that of the second rack 403c, then, when the incomplete gear 403a continues to rotate until breaking away from the first rack 403b, the first push rod 301b is pushed, the first switch 301 is turned off, and at the same time, the limit post 403a-3 slides from one end of the initial arc slot 304d to the end, and at this time, the state of the invention is opposite to the initial state, the first switch 301, i.e. the main power set in this embodiment, is open, and the second switch 302, i.e. the standby power set in this embodiment, is closed, and if the state needs to be returned to the initial state, the incomplete gear 403a needs to be continuously rotated in the opposite direction to the above-mentioned incomplete gear 403 a. The invention can not generate the condition of no power supply in the middle when switching the main power supply and the standby power supply, because the other power supply is connected before any power supply is disconnected no matter what operation, the condition ensures that the load is not lost in the switching process.
Example 4
Referring to fig. 1 to 14, a fourth embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: the intelligent switch 201 further includes a separation assembly 500 in the above embodiment, where the separation assembly 500 functions to separate the adjustment assembly 403 from the circuit breaking assembly 300 under special conditions without requiring the circuit to be powered down. Specifically, the separation assembly 500 includes a handle 501 connected to the incomplete gear 403a, an adjustment housing 502 connected to the mounting plate 304, and a separation lever 503 between the handle 501 and the adjustment housing 502, the handle 501 facilitates rotation of the incomplete gear 403a, the adjustment housing 502 is located on a different side from the incomplete gear 403a, and when the separation lever 503 moves away from the fixing plate 303 by bolting, the incomplete gear 403a is lifted up, the incomplete gear 403a is separated from the rack, and the rack is not controlled by the incomplete gear 403a, i.e., the separation is completed.
Further, the separating rod 503 is divided into a first end 503a and a second end 503b, a limiting boss 503c is disposed between the first end 503a and the second end 503b, the limiting boss 503c plays a role of supporting the incomplete gear 403a, wherein the mounting plate 304 is provided with a receiving hole 304c between the incomplete gear 403a and the adjusting housing 502, and the limiting boss 503c is located in the receiving hole 304 c. The handle 501 is provided with a through hole 501a, a first end 503a is positioned in the through hole 501a, the adjusting housing 502 comprises a limiting plate 502a and a cylinder 502b, the limiting plate 502a is fixed on the mounting plate 304, a positioning rod 503d is radially arranged at the second end 503b, an elastic piece 504 is connected between the positioning rod 503d and the mounting plate 304, the elastic piece 504 is a tension spring, the tension of the elastic piece 504 enables the positioning rod 503d to be tightly pulled to a position close to the limiting plate 502a, specifically, one end of the cylinder 502b far away from the mounting plate 304 is provided with a first concave 502b-1, a second concave 502b-2 is arranged adjacent to the first concave 502b-1, the first concave 502b-1 and the second concave 502b-2 are sequentially connected into a ring shape, the depth of the first concave 502b-1 is larger than the depth of the second concave 502b-2, and when the elastic piece 504 is not separated, the tension enables the positioning rod 503d to be positioned in the second concave 502b-2, at this time, just the incomplete gear 403a can be meshed with the corresponding rack, when the incomplete gear 403a needs to be separated, a screwdriver is used to extend into the through hole 501a, the first end 503a is pressed, at this time, the positioning rod 503d is separated from the second recess 502b-2, and the separating rod 503 is rotated to enable the positioning rod 503d to fall into the first recess 502b-1, because the depth of the first recess 502b-1 is larger than that of the second recess 502b-2, the positioning rod 503d is pulled by the elastic piece 504, the limiting boss 503c is far away from the accommodating hole 304c, and the incomplete gear 403a is lifted to be separated from the first rack 403b and the second rack 403c, so that the states of the two switches can be independently controlled, and when the incomplete gear 403a needs to be recovered, the above steps are repeated, the positioning rod 503d is separated from the first recess 502b-1 and enters the second recess 502b-2, so that the control of the whole device can be completed, the operation is convenient.
It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Furthermore, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the invention, or those not associated with practicing the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (1)
1. A direct current intelligent busbar and feeder system of a transformer substation is characterized in that: comprising the steps of (a) a step of,
a power supply unit (100) comprising a first regular bus (101) and a first spare bus (102),
the control unit (200) comprises a plurality of intelligent switches (201) connected in parallel, a load (202) connected with the intelligent switches (201), a controller (203) for controlling the intelligent switches (201) to act, and an intelligent monitoring device (204) connected with the controller (203), wherein the first regular bus (101) and the first standby bus (102) are both connected with the intelligent switches (201), and the intelligent monitoring device (204) monitors the state of the power supply unit (100) and controls the disconnection and the connection of the intelligent switches (201) with the first regular bus (101) and the first standby bus (102) through the controller (203);
the power supply unit (100) further comprises a second conventional bus (103) and a second standby bus (104), the first conventional bus (101) is connected with the second standby bus (104) through a first direct current chopper (105), the second conventional bus (103) is connected with the first standby bus (102) through a second direct current chopper (106), and the second conventional bus (103) and the second standby bus (104) are connected with a plurality of intelligent switches (201);
the intelligent switch (201) comprises a control circuit,
the circuit breaking assembly (300) comprises a first switch (301) and a second switch (302), a fixed plate (303) and a mounting plate (304) connected with the fixed plate (303), wherein the first switch (301) and the second switch (302) are arranged on the fixed plate (303) side by side, the first switch (301) is divided into a first body (301 a) and a first push rod (301 b), the second switch (302) is divided into a second body (302 a) and a second push rod (302 b), the mounting plate (304) is provided with a conversion assembly (400), a plurality of first switches (301) are connected with the first conventional bus (101) and the second conventional bus (103), and a plurality of second switches (302) are connected with the first standby bus (102) and the second standby bus (104);
a conversion assembly (400) comprising a first toggle member (401) and a second toggle member (402) positioned on the mounting plate (304), and an adjustment assembly (403) simultaneously connecting the first toggle member (401) and the second toggle member (402);
the outer end of the first push rod (301 b) is embedded in the first stirring piece (401), and the outer end of the second push rod (302 b) is embedded in the second stirring piece (402);
the adjusting assembly (403) comprises an incomplete gear (403 a) positioned on the mounting plate (304), a first rack (403 b) meshed with the incomplete gear (403 a), a second rack (403 c) meshed with the incomplete gear (403 a), a first connecting piece (403 d) hinged with the first rack (403 b) and a second connecting piece (403 e) hinged with the second rack (403 c), wherein the incomplete gear (403 a) comprises a tooth surface (403 a-1) and a smooth surface (403 a-2), the length of the smooth surface (403 a-2) is larger than the length of the tooth surface (403 a-1), the first connecting piece (403 d) is connected to the first stirring piece (401), the second connecting piece (403 e) is connected to the second connecting piece (403 e), and the first rack (403 b) and the second rack (403 c) are arranged in parallel;
the first stirring piece (401) comprises a first bayonet (401 a) and a first stirring block (401 b), the second stirring piece (402) comprises a second bayonet (402 a) and a second stirring block (402 b), the first push rod (301 b) is embedded in the first bayonet (401 a), the second push rod (302 b) is embedded in the second bayonet (402 a), the first stirring block (401 b) is connected with a first rotating piece (404), the second stirring block (402 b) is connected with a second rotating piece (405), the first connecting piece (403 d) is divided into a first hinging end (403 d-1) and a first sliding end (403 d-2), and the second connecting piece (403 e) is divided into a second hinging end (403 e-1) and a second sliding end (403 e-2);
the first hinge end (403 d-1) is hinged with the first rack (403 b), the first sliding end (403 d-2) is inserted into the first rotating member (404) and slides, the second hinge end (403 e-1) is hinged with the second rack (403 c), and the second sliding end (403 e-2) is inserted into the second rotating member (405) and slides;
the mounting plate (304) is provided with a sliding groove (304 a) and guide grooves (304 b) positioned on two sides of the sliding groove (304 a), and the first bayonet (401 a) and the second bayonet (402 a) are positioned in the corresponding sliding groove (304 a);
the two ends of the first stirring block (401 b) are provided with first guide columns (401 c), and the first guide columns (401 c) are embedded in the guide grooves (304 b); second guide columns (402 c) are arranged at two ends of the second stirring block (402 b), and the second guide columns (402 c) are embedded in the guide grooves (304 b);
the mounting plate (304) is also connected with a first rotating bracket (406) and a second rotating bracket (407), the first rotating bracket (406) and the second rotating bracket (407) are symmetrically arranged on two sides of the incomplete gear (403 a), the first connecting piece (403 d) penetrates through the first rotating bracket (406), and the second connecting piece (403 e) penetrates through the second rotating bracket (407);
the mounting plate (304) is also connected with two sliding rods (408), a first sliding hole (403 b-1) is formed in the first rack (403 b) along the moving direction, a second sliding hole (403 c-1) is formed in the second rack (403 c) along the moving direction, and the sliding rods (408) respectively penetrate through the first sliding hole (403 b-1) and the second sliding hole (403 c-1);
a limiting column (403 a-3) is arranged on one surface of the incomplete gear (403 a) contacted with the mounting plate (304), an arc-shaped groove (304 d) is arranged on one surface of the mounting plate (304) contacted with the incomplete gear (403 a), and the limiting column (403 a-3) slides in the arc-shaped groove (304 d);
the device also comprises a separation assembly (500), wherein the separation assembly (500) comprises a handle (501) connected with the incomplete gear (403 a), an adjusting shell (502) connected with the mounting plate (304) and a separation rod (503) positioned between the handle (501) and the adjusting shell (502), the adjusting shell (502) is positioned at one side different from the incomplete gear (403 a), when the separation rod (503) moves away from the fixing plate (303) through bolt fixation, the incomplete gear (403 a) is lifted, the incomplete gear (403 a) is separated from the rack, and the rack is not controlled by the incomplete gear (403 a), namely the separation is completed;
the separation rod (503) is divided into a first end (503 a) and a second end (503 b), a limiting boss (503 c) is arranged between the first end (503 a) and the second end (503 b), a containing hole (304 c) is arranged at a position between the incomplete gear (403 a) and the adjusting shell (502) on the mounting plate (304), and the limiting boss (503 c) is positioned in the containing hole (304 c); the handle (501) is provided with through-hole (501 a), first end (503 a) is located through-hole (501 a), adjust casing (502) and include limiting plate (502 a) and drum (502 b), limiting plate (502 a) are fixed on mounting panel (304), second end (503 b) radially are provided with locating lever (503 d), be connected with elastic component (504) between locating lever (503 d) and mounting panel (304), elastic component (504) are the tension spring, the pulling force of elastic component (504) makes locating lever (503 d) tightly draw to the position that is close to limiting plate (502 a), drum (502 b) are provided with first recess (502 b-1) far away from one end of mounting panel (304), be provided with second recess (502 b-2) adjacent with first recess (502 b-1), first recess (502 b-1) and second recess (502 b-2) connect gradually into the annular, the degree of depth of first recess (502 b-1) is greater than the degree of depth of second recess (502 b-2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010552056.3A CN113809731B (en) | 2020-06-17 | 2020-06-17 | Intelligent DC bus and feeder system of transformer substation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010552056.3A CN113809731B (en) | 2020-06-17 | 2020-06-17 | Intelligent DC bus and feeder system of transformer substation |
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| CN113809731B true CN113809731B (en) | 2024-04-05 |
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