CN114142447B - Method for realizing automatic power transfer of incompletely configured intelligent distributed system - Google Patents

Method for realizing automatic power transfer of incompletely configured intelligent distributed system Download PDF

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Publication number
CN114142447B
CN114142447B CN202111418097.4A CN202111418097A CN114142447B CN 114142447 B CN114142447 B CN 114142447B CN 202111418097 A CN202111418097 A CN 202111418097A CN 114142447 B CN114142447 B CN 114142447B
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China
Prior art keywords
plate
power transfer
automatic power
distributed system
intelligent distributed
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CN202111418097.4A
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Chinese (zh)
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CN114142447A (en
Inventor
宁楠
罗金龙
孙睿择
饶赟
杜林�
古户强
王师国
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Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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Classifications

    • 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
    • H02H7/28—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 meshed systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions
    • H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16—Electric power substations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The application discloses a method for realizing automatic power transfer of an incompletely configured intelligent distributed system, which comprises the steps of butting all ring main units through a cable junction box to form a passage; confirming whether the communication between the head switch and the adjacent switch is normal or not; confirming whether the head switch is at a closing position; confirming whether the relay protection device of the first switch detects sudden drop or zero of the secondary alternating voltage and does not detect short-circuit current; if the conditions are all satisfied, the first signal is fed back. According to the method, when the terminal of the intelligent distributed system is installed in the single-side transformer substation, the system can still realize the function of automatic power transfer, and each ring main unit can be quickly connected through the arrangement of the cable junction box to form a passage, so that a foundation is provided for automatic power transfer.

Description

Method for realizing automatic power transfer of incompletely configured intelligent distributed system
Technical Field
The application relates to the technical field of intelligent distributed systems, in particular to a method for realizing automatic power transfer by incompletely configuring an intelligent distributed system.
Background
At present, the requirements of power distribution network users on power supply reliability are continuously improved, the fault removal time is expected to be as short as possible, and the fault influence range is as small as possible. Therefore, a method of how to complete automatic power transfer by incompletely configuring an intelligent distribution system becomes a hot spot for research of each related technical unit.
In general, terminals of the existing distribution network intelligent distributed system should be installed in substations at two ends of a protected line, and when the terminals are installed in a single-side substation, an automatic power transfer function cannot be realized.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application.
The present application has been developed in view of the above-discussed and/or existing problems in methods for implementing automatic power transfer for incompletely configured intelligent distributed systems.
Therefore, the problem to be solved by the present application is how to provide a method for implementing automatic power transfer by incompletely configuring an intelligent distributed system.
In order to solve the technical problems, the application provides the following technical scheme: a method for realizing automatic power transfer of an incompletely configured intelligent distributed system comprises the steps of butting all ring main units through a cable junction box to form a passage;
confirming whether the communication between the head switch and the adjacent switch is normal or not;
confirming whether the head switch is at a closing position;
confirming whether the relay protection device of the first switch detects sudden drop or zero of the secondary alternating voltage and does not detect short-circuit current;
if the conditions are all met, feeding back a first signal;
confirming whether a relay protection device of the head switch does not detect secondary current or whether the detected secondary current value is smaller than 0.125A;
if the conditions are all met, feeding back a second signal;
after receiving the second signal, the head switch trips after a fixed time delay;
after the first switch is at the opening position, transmitting a third signal to the adjacent switch;
after receiving the third signal, the intelligent distributed system starts an automatic power transfer strategy, and the power supply is recovered in the non-fault area;
the cable junction box comprises a box body and a wiring unit, wherein the wiring unit is arranged in the box body;
the box body comprises a bearing box and an end cover, and the bearing box is matched with the end cover;
the wiring unit comprises a rotating part, a bending part matched with the rotating part, a conductive part arranged on the inner side surface of the box body, and a wire pressing part arranged on the side surface of the box body, wherein the rotating part comprises a first cylinder rotationally matched with the box body, a first auxiliary plate fixedly connected with the first cylinder, a second cylinder rotationally matched with the first auxiliary plate, a first clamping wheel arranged at the top end of the second cylinder, a first driving part for driving the first cylinder to rotate, and a second driving part for driving the second cylinder to rotate;
the bending piece comprises a third cylinder arranged above the first auxiliary plate, a second clamping wheel arranged at the top end of the third cylinder, an L-shaped rod connected to the first auxiliary plate, and a baffle plate arranged at one side of the L-shaped rod;
the line ball spare is including setting up the circular clamp plate on the box body, and with circular clamp plate screw thread complex clamp plate section of thick bamboo.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the third signal is an "isolate successful" signal.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the circular pressing plate comprises a first pressing plate arranged on the bearing box and a second pressing plate arranged on the end cover, and a plurality of equal angle arrays of the first pressing plate and the second pressing plate are arranged.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the first line pressing plate and the second line pressing plate comprise a first threaded surface which is horizontally arranged, a first inclined surface which is connected with the first threaded surface, and a first line pressing surface which is connected with the first inclined surface.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the pressing plate cylinder comprises a screwing section in threaded fit with the first threaded surface, an inclined section connected with the screwing section, and a shielding section connected with the inclined section.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the inclination angle of the inclined section is larger than that of the first inclined surface.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the length of the shielding section is greater than that of the first line pressing surface.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the first driving piece comprises a first threaded rod in running fit with the box body and a first gear arranged on the first cylinder, and the first threaded rod is meshed with the first gear; the second driving piece comprises a second threaded rod in running fit with the box body and a second gear arranged on the second cylinder, and the second threaded rod is meshed with the second gear.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the bending piece further comprises a fourth cylinder arranged on the bottom surface of the first auxiliary plate, and a first track groove matched with the fourth cylinder is formed in the inner bottom surface of the box body.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the rotating member further includes a second auxiliary plate connecting the second cylinder and the third cylinder.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the electric conduction piece comprises a first electric conduction plate fixed on the inner side surface of the box body, a second electric conduction plate in sliding fit with the first electric conduction plate, and springs arranged in the first electric conduction plate and connected with the two second electric conduction plates, wherein the two second electric conduction plates are respectively arranged at two ends of the first electric conduction plate, T-shaped protrusions are arranged on the second electric conduction plate, second track grooves for the second electric conduction plate to move are formed in the first electric conduction plate, and the T-shaped protrusions are matched with the second track grooves.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the box body is internally provided with a middle plate, and the middle plate is provided with a third track groove for the rotation of the third cylinder and a fourth track groove for the rotation of the L-shaped rod.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the wiring unit further comprises bearing plates arranged on two sides of the second auxiliary plate, and arc grooves are formed in the bearing plates.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the first clamping wheel comprises a top plate, a connecting column and a bottom plate, wherein the connecting column is connected with the top plate and the bottom plate, the top plate is an arc plate, and the arc length of the top plate is smaller than half of the circumference of the finished circle.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: the connecting column is provided with a plurality of ratchets, and the ratchets are arranged corresponding to the top plate.
As a preferable scheme of the method for realizing automatic power transfer of the incompletely configured intelligent distributed system, the application comprises the following steps: a fifth track groove is formed in the bottom of the bottom plate, and a limit column matched with the fifth track groove is arranged on the second auxiliary plate
The application has the beneficial effects that: when the terminal of the intelligent distributed system is only installed in a single-side transformer substation, the system can still realize an automatic power transfer function, and through the arrangement of the cable junction box, each ring main unit can be quickly connected to form a passage, so that a foundation is provided for automatic power transfer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, 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 application, 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 an exemplary diagram of F5 failure in a method for implementing automatic power transfer for an incompletely configured intelligent distributed system.
Fig. 2 is a schematic diagram of adjacent switches for implementing a method of automatic power transfer for an incompletely configured intelligent distributed system.
Fig. 3 is a logic block diagram of a method for implementing automatic power transfer for an incompletely configured intelligent distributed system.
Fig. 4 is a block diagram of a cable junction box that does not fully configure the method for an intelligent distributed system to implement automatic power transfer.
Fig. 5 is a cross-sectional view of a cable terminal block that does not fully configure the method of the intelligent distributed system to achieve automatic power transfer.
Fig. 6 is another directional cross-sectional view of a cable junction box that does not fully configure the method of the intelligent distributed system to achieve automatic power transfer.
Fig. 7 is a diagram of a wire pressing member of a method for implementing automatic power switching by incompletely configuring an intelligent distributed system.
Fig. 8 is a cross-sectional view of a wire component of a method for implementing automatic power transfer without fully configuring an intelligent distributed system.
FIG. 9 is a mid-plane schematic diagram of a method of preventing anomalies in a smart distributed system.
FIG. 10 is a schematic diagram of a load-bearing plate in a method of preventing anomalies in an intelligent distributed system.
Fig. 11 is a cross-sectional view of a conductive member of a method of preventing an abnormality of an intelligent distributed system.
Fig. 12 is a second conductive plate structure diagram of a method of preventing an abnormality of an intelligent distributed system.
Fig. 13 is a first chucking wheel architecture diagram of a method of preventing anomalies in a smart distribution system.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application 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 application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the application. 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 and fig. 2, in a first embodiment of the present application, a method for implementing automatic power transfer by an incomplete-configuration intelligent distributed system is provided, where the method for implementing automatic power transfer by the incomplete-configuration intelligent distributed system includes:
the ring main units are butted through the cable junction boxes S to form a passage;
confirming whether the communication between the head switch and the adjacent switch is normal or not; it should be noted that a substation not equipped with an intelligent distributed terminal manually defines a certain switch after outbound as a head switch along the line direction.
Confirming whether the head switch is at a closing position;
confirming whether the relay protection device of the first switch detects sudden drop or zero of the secondary alternating voltage and does not detect short-circuit current;
if the conditions are all met, feeding back a first signal;
confirming whether a relay protection device of the head switch does not detect secondary current or whether the detected secondary current value is smaller than 0.125A;
if the conditions are all met, feeding back a second signal;
after receiving the second signal, the head switch trips after a fixed time delay;
after the first switch is at the opening position, a third signal is transmitted to the adjacent switch, and the third signal is an 'isolation success' signal.
After receiving the third signal, the intelligent distributed system starts an automatic power transfer strategy, and the power supply is recovered in the non-fault area;
the cable junction box S includes a box body 100 and a wiring unit 200, and the wiring unit 200 is disposed in the box body 100.
The box body 100 comprises a bearing box 103 and an end cover 104, wherein the bearing box 103 is matched with the end cover 104.
The wiring unit 200 comprises a rotating member 201, a bending member 202 matched with the rotating member 201, a conductive member 203 arranged on the inner side surface of the box body 100, and a wire pressing member 205 arranged on the side surface of the box body 100, wherein the rotating member 201 comprises a first cylinder 201a in rotating fit with the box body 100, a first auxiliary plate 201b fixedly connected with the first cylinder 201a, a second cylinder 201c in rotating fit with the first auxiliary plate 201b, a first clamping wheel 201d arranged at the top end of the second cylinder 201c, a first driving member 201e driving the first cylinder 201a to rotate, and a second driving member 201f driving the second cylinder 201c to rotate.
The bending member 202 includes a third cylinder 202a disposed above the first auxiliary plate 201b, a second clamping wheel 202b disposed at the top end of the third cylinder 202a, an L-shaped rod 202c connected to the first auxiliary plate 201b, and a baffle 202d disposed at one side of the L-shaped rod 202 c.
The pressing member 205 includes a circular pressing plate 205a disposed on the case 100, and a pressing plate cylinder 205b screwed with the circular pressing plate 205 a.
As shown in fig. 2, adjacent switches refer to switches having a direct electrical connection relationship. The adjacent switches to switch 3 in fig. 1 are 2 and 4 instead of switches 1 and 5. The switch mentioned in this embodiment refers to a circuit breaker or a load switch of a voltage class above 1kV in a power system. The closing switch mentioned in this embodiment means that the switch position is in a closing state.
Further, the circular pressing plate 205a includes a first pressing plate 205a-1 disposed on the carrier 103 and a second pressing plate 205a-2 disposed on the end cover 104, where a plurality of equal angle arrays of the first pressing plate 205a-1 and the second pressing plate 205a-2 are disposed. The first wire pressing plate 205a-1 and the second wire pressing plate 205a-2 include a first threaded surface a horizontally arranged, a first inclined surface B connected to the first threaded surface a, and a first wire pressing surface C connected to the first inclined surface B. Gaps are reserved between adjacent line pressing plates. When the circular pressing plate 205a and the pressing plate cylinder 205B are gradually screwed, the inclined section 205B-2 gradually presses the first inclined surface B, so that the first inclined surface B becomes more inclined, at this time, the first pressing line surface C is gradually attached to the surface of the cable, so as to fix the cable, and the connection firmness between the bearing box 103 and the end cover 104 can be further increased through the cooperation of the pressing plate cylinder 205B and the circular pressing plate 205 a.
Preferably, the platen cylinder 205b includes a screw section 205b-1 screw-fitted with the first screw surface a, an inclined section 205b-2 connected to the screw section 205b-1, and a shielding section 205b-3 connected to the inclined section 205 b-2. The inclination angle of the inclined section 205B-2 is larger than that of the first inclined surface B. The length of the shielding section 205b-3 is greater than the length of the first pressing line surface C.
Further, the first driving member 201e includes a first threaded rod 201e-1 rotatably coupled to the case 100, and a first gear 201e-2 disposed on the first cylinder 201a, and the first threaded rod 201e-1 is engaged with the first gear 201 e-2. The second driving member 201f includes a second threaded rod 201f-1 rotatably coupled to the case 100, and a second gear 201f-2 disposed on the second cylinder 201c, and the second threaded rod 201f-1 is engaged with the second gear 201 f-2.
It should be noted that, the first threaded rod 201e-1 and the second threaded rod 201f-1 are each provided with two threads having opposite directions, so that the two first cylinders 201a or the two second cylinders 201c can be reversely rotated.
Preferably, the bending member 202 further includes a fourth cylinder 202e disposed on the bottom surface of the first auxiliary plate 201b, and the inner bottom surface of the case 100 is provided with a first track groove 101 that is matched with the fourth cylinder 202e, where the first track groove 101 is configured to limit rotation of the fourth cylinder 202e so as to rotate only within the range of the first track groove 101. The rotating member 201 further includes a second auxiliary plate 201g, the second auxiliary plate 201g connecting the second cylinder 201c and the third cylinder 202a, the second auxiliary plate 201g being provided to increase the connection stability of the second cylinder 201c and the third cylinder 202 a.
The conductive member 203 includes a first conductive plate 203a fixed on the inner side of the case 100, a second conductive plate 203b slidably engaged with the first conductive plate 203a, and a spring 203c disposed in the first conductive plate 203a and connected to the two second conductive plates 203b, where the two second conductive plates 203b are disposed at two ends of the first conductive plate 203a, a T-shaped protrusion 203b-1 is disposed on the second conductive plate 203b, and a second track groove 203a-1 for the second conductive plate 203b to move is disposed on the first conductive plate 203a, and the T-shaped protrusion 203b-1 is engaged with the second track groove 203 a-1.
The box body 100 is internally provided with a middle plate 102, and the middle plate 102 is provided with a third track groove 102a for the third cylinder 202a to rotate and a fourth track groove 102b for the L-shaped rod 202c to rotate.
The spring 203c is an extension spring, in an initial state, the two second conductive plates 203b are in a state with a minimum distance under the action of the spring 203c, when the L-shaped rod 202c rotates to press the cable cell on the second conductive plates 203b, the two second conductive plates 203b are gradually pulled apart until the L-shaped rod 202c moves to a maximum distance or the L-shaped rod 202c rotates to a maximum angle, at this time, the cable cell is clamped by the L-shaped rod 202c and the second conductive plates 203b and cannot be separated, so that the stable contact between the cell and the second conductive plates 203b is ensured.
Further, the wiring unit 200 further includes a carrying plate 204 disposed on two sides of the second auxiliary plate 201g, and an arc groove 204a is disposed on the carrying plate 204. The first clamping wheel 201d comprises a top plate 201d-1, a connecting column 201d-2 and a bottom plate 201d-3, the connecting column 201d-2 is connected with the top plate 201d-1 and the bottom plate 201d-3, the top plate 201d-1 is an arc plate, the arc length of the top plate 201d-1 is smaller than half of the circumference of the finished circle, when a battery cell passes through the first clamping wheel 201d, the top plate 201d-1 and the bottom plate 201d-3 can clamp the battery cell, and after the top plate 201d-1 rotates for a certain angle, the top plate 201d-1 can not clamp the battery cell, and the bent battery cell can be taken out at the moment.
The connecting column 201d-2 is provided with a plurality of ratchets 201d-21, and the ratchets 201d-21 are provided corresponding to the top plate 201 d-1. The ratchet 201d-21 is provided to prevent the cell from being withdrawn when external force is applied, and to allow the first chucking wheel 201d to rotate in a direction to withdraw the ratchet 201d-21 from the cell.
The bottom of the bottom plate 201d-3 is provided with a fifth track groove 201d-31, the second auxiliary plate 201g is provided with a limit post 201g-1 matched with the fifth track groove 201d-31, and the arrangement of the fifth track groove 201d-31 and the limit post 201g-1 can enable the first clamping wheel 201d to move only in the range of the fifth track groove 201d-31 to prevent the first clamping wheel from rotating excessively so as to clamp the battery cell again.
In summary, each ring main unit is docked through the cable junction box S to form a passage, so that the intelligent distributed function is started, and then each switch state is confirmed, so that the system can still realize the automatic power supply transferring function when the terminal of the intelligent distributed system is only installed in a single-side transformer substation.
When each ring main unit is docked through the cable junction box S, the electric cores of the two cables are inserted between the first clamping wheels 201d and the second clamping wheels 202b at the two sides until the electric cores are blocked by the baffle 202d, the electric cores of the cables are bent through the first driving piece 201e, the two cables are docked through the conductive piece 203, and the cables are further fixed through the pressing plate barrel 205b and the circular pressing plate 205 a; when the ring main unit needs to be disassembled, the pressing plate cylinder 205b is unscrewed, the end cover 104 is taken down, the top plate 201d-1 is not clamped with the battery cell any more through the second driving piece 201f, then the cable is taken out, the whole connection process is simple and convenient, the ring main unit is electrically connected conveniently, and the installation time is saved.
Example 2
Referring to fig. 2 to 7, a second embodiment of the present application is shown.
In the embodiment, no intelligent distributed terminal is installed in the purple light transformer substation, and a certain switch after the purple light transformer substation is out of the station is defined as a first switch, as shown in fig. 1, a switch of a No. 2 ring main unit 012. The primary switch functions or functions similarly to the purple light to purple loop 015 switch, and acts as a power point outlet switch for transmitting and receiving adjacent switch data in the intelligent distributed system.
The purple loop 015 switch relay protection device in the purple light transformer station acts, and the 015 switch trips.
When the primary switch simultaneously meets the conditions that communication is normal, the secondary voltage is zero, the relay protection device is not started, and the secondary current is smaller than 0.125A or is zero, the switch of the No. 2 ring main unit 012 trips after fixed time delay. In this embodiment, the first switch is a 012 switch in the number 2 ring main unit.
The switch of the No. 2 ring main unit 012 confirms that the switch is at the switch-off position.
The tie switch is switched on, and in the embodiment, the tie switch is a 013 switch in the No. 2 ring main unit.
And the load in the No. 2 ring main unit recovers power supply to finish power supply conversion.
It should be noted that the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same, and although the present application 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 application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application, which is intended to be covered in the scope of the claims of the present application.

Claims (16)

1. A method for realizing automatic power transfer by incompletely configuring an intelligent distributed system is characterized by comprising the following steps: comprising the steps of (a) a step of,
each ring main unit is butted through a cable junction box (S) to form a passage;
confirming whether the communication between the head switch and the adjacent switch is normal or not;
confirming whether the head switch is at a closing position;
confirming whether the relay protection device of the first switch detects sudden drop or zero of the secondary alternating voltage and does not detect short-circuit current;
if the conditions are all met, feeding back a first signal;
confirming whether a relay protection device of the head switch does not detect secondary current or whether the detected secondary current value is smaller than 0.125A;
if the conditions are all met, feeding back a second signal;
after receiving the second signal, the head switch trips after a fixed time delay;
after the first switch is at the opening position, transmitting a third signal to the adjacent switch;
after receiving the third signal, the intelligent distributed system starts an automatic power transfer strategy, and the power supply is recovered in the non-fault area;
the cable junction box (S) comprises a box body (100) and a wiring unit (200), wherein the wiring unit (200) is arranged in the box body (100);
the box body (100) comprises a bearing box (103) and an end cover (104), and the bearing box (103) is matched with the end cover (104);
the wiring unit (200) comprises a rotating part (201), a bending part (202) matched with the rotating part (201), a conductive part (203) arranged on the inner side surface of the box body (100), and a wire pressing part (205) arranged on the side surface of the box body (100), wherein the rotating part (201) comprises a first cylinder (201 a) matched with the box body (100) in a rotating way, a first auxiliary plate (201 b) fixedly connected with the first cylinder (201 a), a second cylinder (201 c) matched with the first auxiliary plate (201 b) in a rotating way, a first clamping wheel (201 d) arranged at the top end of the second cylinder (201 c), a first driving part (201 e) for driving the first cylinder (201 a) to rotate, and a second driving part (201 f) for driving the second cylinder (201 c) to rotate;
the bending piece (202) comprises a third cylinder (202 a) arranged above the first auxiliary plate (201 b), a second clamping wheel (202 b) arranged at the top end of the third cylinder (202 a), an L-shaped rod (202 c) connected to the first auxiliary plate (201 b), and a baffle plate (202 d) arranged at one side of the L-shaped rod (202 c);
the wire pressing piece (205) comprises a round pressing plate (205 a) arranged on the box body (100) and a pressing plate barrel (205 b) in threaded fit with the round pressing plate (205 a).
2. The method for implementing automatic power transfer by incompletely configured intelligent distributed systems according to claim 1, wherein: the third signal is an "isolate successful" signal.
3. A method for implementing automatic power transfer by an incompletely configured intelligent distributed system according to claim 1 or 2, comprising: the circular pressing plate (205 a) comprises a first pressing plate (205 a-1) arranged on the bearing box (103) and a second pressing plate (205 a-2) arranged on the end cover (104), and a plurality of equal-angle arrays of the first pressing plate (205 a-1) and the second pressing plate (205 a-2) are arranged.
4. A method for implementing automatic power transfer for an incompletely configured intelligent distributed system as defined in claim 3, wherein: the first wire pressing plate (205 a-1) and the second wire pressing plate (205 a-2) comprise a first threaded surface (A) which is horizontally arranged, a first inclined surface (B) which is connected with the first threaded surface (A), and a first wire pressing surface (C) which is connected with the first inclined surface (B).
5. The method for implementing automatic power transfer by the incompletely configured intelligent distributed system according to claim 4, wherein: the platen cylinder (205 b) includes a screwing section (205 b-1) screw-fitted with the first screw surface (a), an inclined section (205 b-2) connected to the screwing section (205 b-1), and a shielding section (205 b-3) connected to the inclined section (205 b-2).
6. The method for implementing automatic power transfer by the incompletely configured intelligent distributed system according to claim 5, wherein: the inclination angle of the inclined section (205B-2) is larger than the inclination angle of the first inclined surface (B).
7. The method for implementing automatic power transfer by the incompletely configured intelligent distributed system according to claim 6, wherein: the length of the shielding section (205 b-3) is larger than that of the first line pressing surface (C).
8. A method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 6 or 7, comprising: the first driving piece (201 e) comprises a first threaded rod (201 e-1) in rotating fit with the box body (100), and a first gear (201 e-2) arranged on the first cylinder (201 a), and the first threaded rod (201 e-1) is meshed with the first gear (201 e-2);
the second driving piece (201 f) comprises a second threaded rod (201 f-1) in rotating fit with the box body (100), and a second gear (201 f-2) arranged on the second cylinder (201 c), and the second threaded rod (201 f-1) is meshed with the second gear (201 f-2).
9. The method for implementing automatic power transfer by an incompletely configured intelligent distributed system according to claim 8, wherein: the bending piece (202) further comprises a fourth cylinder (202 e) arranged on the bottom surface of the first auxiliary plate (201 b), and a first track groove (101) matched with the fourth cylinder (202 e) is formed in the inner bottom surface of the box body (100).
10. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 9, wherein: the rotating member (201) further includes a second auxiliary plate (201 g), and the second auxiliary plate (201 g) connects the second cylinder (201 c) and the third cylinder (202 a).
11. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 10, wherein: the electric conduction piece (203) comprises a first electric conduction plate (203 a) fixed on the inner side surface of the box body (100), a second electric conduction plate (203 b) in sliding fit with the first electric conduction plate (203 a), and springs (203 c) arranged in the first electric conduction plate (203 a) and connected with the two second electric conduction plates (203 b), wherein the two second electric conduction plates (203 b) are respectively arranged at two ends of the first electric conduction plate (203 a), T-shaped protrusions (203 b-1) are arranged on the second electric conduction plate (203 b), second track grooves (203 a-1) for the second electric conduction plate (203 b) to move are formed in the first electric conduction plate (203 a), and the T-shaped protrusions (203 b-1) are matched with the second track grooves (203 a-1).
12. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 11, wherein: the box body (100) is internally provided with a middle plate (102), and the middle plate (102) is provided with a third track groove (102 a) for the third cylinder (202 a) to rotate and a fourth track groove (102 b) for the L-shaped rod (202 c) to rotate.
13. A method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 11 or 12, comprising: the wiring unit (200) further comprises bearing plates (204) arranged on two sides of the second auxiliary plate (201 g), and arc grooves (204 a) are formed in the bearing plates (204).
14. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 13, wherein: the first clamping wheel (201 d) comprises a top plate (201 d-1), a connecting column (201 d-2) and a bottom plate (201 d-3), wherein the connecting column (201 d-2) is connected with the top plate (201 d-1) and the bottom plate (201 d-3), the top plate (201 d-1) is an arc plate, and the arc length of the top plate (201 d-1) is smaller than half of the whole circumference.
15. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 14, wherein: a plurality of ratchets (201 d-21) are arranged on the connecting column (201 d-2), and the ratchets (201 d-21) are arranged corresponding to the top plate (201 d-1).
16. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system according to claim 15, wherein: a fifth track groove (201 d-31) is formed in the bottom of the bottom plate (201 d-3), and a limit column (201 g-1) matched with the fifth track groove (201 d-31) is arranged on the second auxiliary plate (201 g).
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