CN114142447A - Method for realizing automatic power supply transfer of incomplete configuration intelligent distributed system - Google Patents
Method for realizing automatic power supply transfer of incomplete configuration intelligent distributed system Download PDFInfo
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- CN114142447A CN114142447A CN202111418097.4A CN202111418097A CN114142447A CN 114142447 A CN114142447 A CN 114142447A CN 202111418097 A CN202111418097 A CN 202111418097A CN 114142447 A CN114142447 A CN 114142447A
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- 238000000034 method Methods 0.000 title claims abstract description 69
- 238000012546 transfer Methods 0.000 title claims description 42
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 50
- 238000005452 bending Methods 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- H02H7/28—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
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- 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
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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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- 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
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- 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
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- 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 invention discloses a method for realizing automatic power supply switching of an incompletely configured intelligent distributed system, which comprises the following steps of butting ring main units through a cable junction box to form a passage; confirming whether the communication between the first switch and the adjacent switch is normal; confirming whether the first switch is in a switching-on position or not; confirming whether a relay protection device of a first switch detects that the secondary alternating voltage suddenly drops or is zero and does not detect short-circuit current; and if the above conditions are all satisfied, feeding back the first signal. According to the method, when the terminal of the intelligent distributed system is only installed in a single-side transformer substation, the system can still realize the automatic power supply switching function, and through the arrangement of the cable junction box, each ring main unit can be quickly connected in a butt joint mode to form a passage, so that a foundation is provided for automatic power supply switching.
Description
Technical Field
The invention relates to the technical field of intelligent distributed systems, in particular to a method for realizing automatic power supply switching of an incompletely configured intelligent distributed system.
Background
At present, the requirement of a power distribution network user on power supply reliability is continuously improved, the fault clearing time is expected to be as short as possible, and the fault influence range is expected to be as small as possible. Therefore, how to complete the automatic power supply transfer method of the incompletely configured intelligent distribution system becomes a hot spot of research of each related technical unit.
Generally, terminals of an existing distribution network intelligent distributed system are installed in substations at two ends of a protected line, and when the terminals are only installed in a single-side substation, the automatic power supply switching function cannot be achieved.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems occurring in the conventional method for implementing automatic power transfer in an incompletely configured intelligent distributed system.
Therefore, the problem to be solved by the present invention is how to provide a method for implementing automatic power transfer for an incompletely configured intelligent distributed system.
In order to solve the technical problems, the invention provides the following technical scheme: a method for realizing automatic power supply switching of an incomplete configuration intelligent distributed system comprises the following steps of butting ring main units through a cable junction box to form a passage;
confirming whether the communication between the first switch and the adjacent switch is normal;
confirming whether the first switch is in a switching-on position or not;
confirming whether a relay protection device of a first switch detects that the secondary alternating voltage suddenly drops or is zero and does not detect short-circuit current;
if the above conditions are all satisfied, feeding back a first signal;
confirming whether the relay protection device of the first switch does not detect secondary current or whether the detected secondary current value is less than 0.125A;
if the above conditions are all satisfied, feeding back a second signal;
after receiving the second signal, the first switch trips after fixed time delay;
after the first switch is at the brake-off position, a third signal is transmitted to the adjacent switch;
after receiving the third signal, the intelligent distributed system starts an automatic power supply switching strategy, and power supply is recovered in a non-fault area;
the cable junction box comprises a box body and a wiring unit, and 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 face of the box body and a wire pressing part arranged on the side face of the box body, wherein the rotating part comprises a first cylinder in rotating fit with the box body, a first auxiliary plate fixedly connected with the first cylinder, a second cylinder in rotating fit with the first auxiliary plate, a first clamping wheel arranged at the top end of the second cylinder, a first driving part driving the first cylinder to rotate and a second driving part 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 arranged on one side of the L-shaped rod;
the wire pressing piece comprises a circular pressing plate arranged on the box body and a pressing plate barrel in threaded fit with the circular pressing plate.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the third signal is an "isolation successful" signal.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the circular pressing plate comprises a first pressing plate and a second pressing plate, the first pressing plate is arranged on the bearing box, the second pressing plate is arranged on the end cover, and the first pressing plate and the second pressing plate are arranged in an equal-angle array and are provided with a plurality of angles.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the first thread pressing plate and the second thread pressing plate comprise a first thread surface arranged horizontally, a first inclined surface connected with the first thread surface and a first thread pressing surface connected with the first inclined surface.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the pressing plate cylinder comprises a screwing section in threaded fit with the first thread surface, an inclined section connected with the screwing section, and a shielding section connected with the inclined section.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the inclination angle of the inclined section is larger than that of the first inclined plane.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the length of the shielding section is greater than that of the first line pressing surface.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the first driving piece comprises a first threaded rod in rotating 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 rotating 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 preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method 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 preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the rotating member further includes a second auxiliary plate connecting the second cylinder and the third cylinder.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: electrically conductive piece including fixing the inside side of box body first current conducting plate, with first current conducting plate sliding fit's second current conducting plate, and set up in the first current conducting plate and connect two the spring of second current conducting plate, two the second current conducting plate set up respectively in the both ends of first current conducting plate, it is protruding to be provided with the T type on the second current conducting plate, be provided with the confession on the first current conducting plate the second orbit groove that the second current conducting plate removed, the T type protruding with second orbit groove cooperation.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the box body is internally provided with an intermediate plate, and the intermediate plate is provided with a third track groove for rotating the third cylinder and a fourth track groove for rotating the L-shaped rod.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method 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 preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: the first clamping wheel comprises a top plate, a connecting column and a bottom plate, 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 completed circumference.
As a preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method 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 preferred scheme of the method for implementing automatic power supply transfer by the incomplete configuration intelligent distributed system, the method comprises the following steps: a fifth track groove is formed in the bottom of the bottom plate, and a limiting column matched with the fifth track groove is arranged on the second auxiliary plate
The invention has the beneficial effects that: when the terminal of the intelligent distributed system is installed in a single-side transformer substation, the system can still realize the function of automatically converting power supply, and can be quickly butted with each ring main unit to form a passage through the arrangement of the cable junction box, so that a foundation is provided for automatically converting power supply.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a diagram illustrating an example of a failure F5 in the method of implementing automatic power supply transfer by incompletely configuring an intelligent distributed system.
Fig. 2 is a schematic diagram of adjacent switches of a method for implementing automatic power supply transfer by an incompletely configured intelligent distributed system.
Fig. 3 is a logic block diagram of a method for implementing automatic power supply transfer by an incompletely configured intelligent distributed system.
Fig. 4 is a structural diagram of a cable junction box for implementing an automatic power supply switching method in an incomplete configuration intelligent distributed system.
Fig. 5 is a cross-sectional view of a cable junction box in which an intelligent distribution system is not completely configured to implement a method for automatically switching power.
Fig. 6 is another sectional view of the cable junction box partially configured with the intelligent distribution system to implement the method of automatically supplying power.
Fig. 7 is a structural diagram of a line ball for implementing a method for automatically switching power supply in an incompletely configured intelligent distributed system.
Fig. 8 is a cross-sectional view of a wire pressing member in a non-complete configuration of the method for automatically switching power supply of the intelligent distributed system.
Fig. 9 is a schematic diagram of a midplane in a method of preventing an intelligent distributed system anomaly.
FIG. 10 is a schematic diagram of a carrier plate for a method of preventing an anomaly in an intelligent distributed system.
Fig. 11 is a sectional view of a conductive member in a method of preventing an abnormality of an intelligent distribution system.
Fig. 12 is a diagram of a second conductive plate structure in a method of preventing an abnormality of an intelligent distributed system.
Fig. 13 is a diagram of a first chucking wheel in a method of preventing an abnormality of an intelligent distributed system.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
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 than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is 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 and fig. 2, a first embodiment of the present invention provides a method for implementing automatic power transfer by an incompletely configured intelligent distributed system, where the method for implementing automatic power transfer by an incompletely configured intelligent distributed system includes:
the ring main units are butted through a cable junction box S to form a passage;
confirming whether the communication between the first switch and the adjacent switch is normal; it should be noted that, in a substation without an intelligent distributed terminal installed, a switch after the substation leaves the station is manually defined as a first switch.
Confirming whether the first switch is in a switching-on position or not;
confirming whether a relay protection device of a first switch detects that the secondary alternating voltage suddenly drops or is zero and does not detect short-circuit current;
if the above conditions are all satisfied, feeding back a first signal;
confirming whether the relay protection device of the first switch does not detect secondary current or whether the detected secondary current value is less than 0.125A;
if the above conditions are all satisfied, feeding back a second signal;
after receiving the second signal, the first switch trips after fixed time delay;
and after the first switch is at the opening position, transmitting a third signal to the adjacent switch, wherein the third signal is a signal of successful isolation.
After receiving the third signal, the intelligent distributed system starts an automatic power supply switching strategy, and power supply is recovered in a 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 cartridge body 100 comprises a carrying case 103 and an end cap 104, wherein the carrying case 103 is matched with the end cap 104.
The wiring unit 200 includes a rotating member 201, a bending member 202 engaged with the rotating member 201, a conductive member 203 disposed on the inner side of the box 100, and a wire pressing member 205 disposed on the side of the box 100, where the rotating member 201 includes a first cylinder 201a engaged with the box 100, a first auxiliary plate 201b fixedly connected to the first cylinder 201a, a second cylinder 201c engaged with the first auxiliary plate 201b, a first clamping wheel 201d disposed on 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 a 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 wire pressing member 205 includes a circular pressing plate 205a disposed on the box body 100, and a pressing plate cylinder 205b screw-engaged with the circular pressing plate 205 a.
As shown in fig. 2, the adjacent switches are switches having a direct electrical connection relationship. The adjacent switches to switch 3 in fig. 1 are switches 2 and 4 instead of switches 1 and 5. The switch mentioned in the present embodiment refers to a circuit breaker or a load switch of a voltage class of 1kV or more in the power system. The closing switch mentioned in this embodiment means that the switch position is in a closed state.
Further, the circular pressing plate 205a comprises a first wire pressing plate 205a-1 arranged on the bearing box 103 and a second wire pressing plate 205a-2 arranged on the end cover 104, and a plurality of the first wire pressing plates 205a-1 and the second wire pressing plates 205a-2 are arranged in an equal angle array. The first and second thread pressing plates 205a-1 and 205a-2 include a first thread surface a horizontally arranged, a first inclined surface B connected to the first thread surface a, and a first thread pressing surface C connected to the first inclined surface B. And a gap is reserved between the adjacent wire pressing plates. When the circular pressing plate 205a and the pressing plate barrel 205B are gradually screwed, the inclined section 205B-2 gradually compresses the first inclined surface B, so that the first inclined surface B becomes more inclined, at this time, the first pressing line surface C gradually fits with the surface of the cable to fix the cable, and the connection firmness of the bearing box 103 and the end cover 104 can be further increased through the matching of the pressing plate barrel 205B and the circular pressing plate 205 a.
Preferably, the pressing plate barrel 205b comprises a screwing section 205b-1 in threaded fit with the first thread surface a, an inclined section 205b-2 connected with the screwing section 205b-1, and a shielding section 205b-3 connected with the inclined section 205 b-2. The inclined section 205B-2 has an inclination angle greater than that of the first inclined surface B. The length of the shielding section 205b-3 is greater than the length of the first crimping surface C.
Further, the first driving member 201e includes a first threaded rod 201e-1 rotatably engaged with the box body 100, and a first gear 201e-2 disposed on the first cylinder 201a, wherein 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 engaged with the box body 100, and a second gear 201f-2 disposed on the second cylinder 201c, wherein 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 provided with two threads with opposite rotation directions, so that the two first cylinders 201a or the two second cylinders 201c can rotate in opposite directions.
Preferably, the bending member 202 further includes a fourth cylinder 202e disposed on the bottom surface of the first auxiliary plate 201b, the inner bottom surface of the box 100 is provided with a first track groove 101 engaged with the fourth cylinder 202e, and the first track groove 101 is disposed to limit the rotation of the fourth cylinder 202e so that the fourth cylinder 202e can only rotate 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 connects the second cylinder 201c and the third cylinder 202a, and the second auxiliary plate 201g is 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 cartridge 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, the two second conductive plates 203b are respectively disposed at two ends of the first conductive plate 203a, a T-shaped protrusion 203b-1 is disposed on the second conductive plate 203b, 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 100 is provided with an intermediate plate 102, and the intermediate plate 102 is provided with a third track groove 102a for rotating the third cylinder 202a and a fourth track groove 102b for rotating the L-shaped rod 202 c.
The spring 203c is an extension spring, in an initial state, the two second conductive plates 203b are in a state of minimum distance under the action of the spring 203c, after the L-shaped rod 202c rotates to press the cable core on the second conductive plates 203b, the two second conductive plates 203b are gradually pulled apart until the L-shaped rod 202c moves to the maximum distance or the L-shaped rod 202c rotates to the maximum angle, at this time, the cable core is clamped by the L-shaped rod 202c and the second conductive plates 203b and cannot be separated, and stable contact between the cable core and the second conductive plates 203b is ensured.
Further, the wiring unit 200 further includes a bearing plate 204 disposed on two sides of the second auxiliary plate 201g, and the bearing plate 204 is provided with an arc groove 204 a. 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 complete circumference, 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, when the top plate 201d-1 rotates for a certain angle, the top plate 201d-1 cannot clamp the battery cell, and at this time, the bent battery cell can be taken out.
The connecting column 201d-2 is provided with a plurality of ratchets 201d-21, and the ratchets 201d-21 are arranged corresponding to the top plate 201 d-1. The ratchet teeth 201d-21 are configured to prevent the battery cell from being drawn out when an external force is applied thereto, and the first chuck wheel 201d is rotated in a direction to withdraw the ratchet teeth 201d-21 from the battery 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 limiting column 201g-1 matched with the fifth track groove 201d-31, and the arrangement of the fifth track groove 201d-31 and the limiting column 201g-1 can enable the first clamping wheel 201d to move only in the range of the fifth track groove 201d-31, so as to prevent the first clamping wheel from rotating excessively, and further clamp the battery cell again.
In summary, each ring main unit is butted with each cable junction box S to form a passage, so that the intelligent distributed function is started, and then the on-off state is confirmed, so that the system can still realize the automatic power supply switching function only when the terminal of the intelligent distributed system is installed in a single-side transformer substation.
When the ring main units are butted through the cable junction box S, the electric cores of two cables are inserted between the first clamping wheels 201d and the second clamping wheels 202b at two sides until being blocked by the baffle 202d, then the cable electric cores are bent through the first driving piece 201e, the two cables are butted through the conductive piece 203, and the cables are further fixed through the pressure plate cylinder 205b and the circular pressure plate 205 a; when the cable needs to be detached, the pressing plate barrel 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, and then the cable is taken out.
Example 2
Referring to FIGS. 2 to 7, a second embodiment of the present invention is shown.
In an embodiment, an intelligent distributed terminal is not installed in the purple light substation, and a switch after the purple light substation leaves the station is defined as a first switch, such as a No. 2 ring main unit 012 switch shown in fig. 1. The first switch is similar to the purple optical change optical return line 015 switch in function or function, and is used as a power supply point outgoing line switch for transmitting and receiving adjacent switch data in the intelligent distributed system.
A UV optical return line 015 in the UV optical change station switches a relay protection device to act, and a 015 switch trips.
When the first switch meets the conditions that the communication is normal, the secondary voltage is zero, the relay protection device is not started and the secondary current is less than 0.125A or zero, the switch of the No. 2 ring main unit 012 trips through fixed time delay. The first switch in this embodiment is the 012 switch in the 2 # ring main unit.
The No. 2 looped netowrk cabinet 012 switch confirms at the separating brake position.
The interconnection switch is closed, and in this embodiment, the interconnection switch is a 013 switch in the No. 2 ring main unit.
And the load in the ring main unit No. 2 recovers power supply to finish power supply transfer.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (16)
1. A method for realizing automatic power supply transfer of an incomplete configuration intelligent distributed system is characterized by comprising the following steps: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the ring main units are butted through a cable junction box (S) to form a passage;
confirming whether the communication between the first switch and the adjacent switch is normal;
confirming whether the first switch is in a switching-on position or not;
confirming whether a relay protection device of a first switch detects that the secondary alternating voltage suddenly drops or is zero and does not detect short-circuit current;
if the above conditions are all satisfied, feeding back a first signal;
confirming whether the relay protection device of the first switch does not detect secondary current or whether the detected secondary current value is less than 0.125A;
if the above conditions are all satisfied, feeding back a second signal;
after receiving the second signal, the first switch trips after fixed time delay;
after the first switch is at the brake-off position, a third signal is transmitted to the adjacent switch;
after receiving the third signal, the intelligent distributed system starts an automatic power supply switching strategy, and power supply is recovered in a 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), wherein the bearing box (103) is matched with the end cover (104);
the wiring unit (200) comprises a rotating piece (201), a bending piece (202) matched with the rotating piece (201), a conductive piece (203) arranged on the inner side face of the box body (100), and a wire pressing piece (205) arranged on the side face of the box body (100), wherein the rotating piece (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 piece (201e) driving the first cylinder (201a) to rotate, and a second driving piece (201f) driving the second cylinder (201c) to rotate;
the bending piece (202) comprises a third cylinder (202a) arranged above the first auxiliary plate (201b), a second clamping wheel (202b) arranged at the top end of the third cylinder (202a), an L-shaped rod (202c) connected to the first auxiliary plate (201b), and a baffle plate (202d) arranged on one side of the L-shaped rod (202 c);
the wire pressing piece (205) comprises a circular pressing plate (205a) arranged on the box body (100) and a pressing plate cylinder (205b) in threaded fit with the circular pressing plate (205 a).
2. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 1, wherein: the third signal is an "isolation successful" signal.
3. The method for implementing automatic power supply transfer of an incompletely configured intelligent distributed system according to claim 1 or 2, wherein: the circular pressing plate (205a) comprises a first pressing plate (205a-1) arranged on the bearing box (103) and a second pressing plate (205a-2) arranged on the end cover (104), and a plurality of first pressing plates (205a-1) and a plurality of second pressing plates (205a-2) are arranged in an equal-angle array.
4. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 3, wherein: the first pressure plate (205a-1) and the second pressure plate (205a-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 pressure plate surface (C) which is connected with the first inclined surface (B).
5. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 4, wherein: the pressing plate barrel (205b) comprises a screwing section (205b-1) in threaded fit with the first thread surface (A), an inclined section (205b-2) connected with the screwing section (205b-1), and a shielding section (205b-3) connected with the inclined section (205 b-2).
6. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 5, wherein: the inclination angle of the inclined section (205B-2) is larger than that of the first inclined plane (B).
7. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 6, wherein: the length of the shielding section (205b-3) is larger than that of the first line pressing surface (C).
8. The method for implementing automatic power supply transfer of the incompletely configured intelligent distributed system according to claim 6 or 7, wherein: the first driving piece (201e) comprises a first threaded rod (201e-1) in rotating fit with the box body (100) and a first gear (201e-2) arranged on the first cylinder (201a), and the first threaded rod (201e-1) is meshed with the first gear (201 e-2);
the second driving piece (201f) comprises a second threaded rod (201f-1) in running fit with the box body (100) and a second gear (201f-2) arranged on the second cylinder (201c), and the second threaded rod (201f-1) is meshed with the second gear (201 f-2).
9. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 8, wherein: the bending piece (202) further comprises a fourth cylinder (202e) arranged on the bottom surface of the first auxiliary plate (201b), and a first track groove (101) matched with the fourth cylinder (202e) 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 as claimed in claim 9, wherein: the rotating member (201) further comprises a second auxiliary plate (201g), the second auxiliary plate (201g) connecting the second cylinder (201c) and the third cylinder (202 a).
11. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 10, wherein: the conductive piece (203) comprises a first conductive plate (203a) fixed on the inner side surface of the box body (100), a second conductive plate (203b) in sliding fit with the first conductive plate (203a), and a spring (203c) arranged in the first conductive plate (203a) and connected with the two second conductive plates (203b), the two second conductive plates (203b) are respectively arranged at two ends of the first conductive plate (203a), a T-shaped bulge (203b-1) is arranged on the second conductive plate (203b), a second track groove (203a-1) for the second conductive plate (203b) to move is arranged on the first conductive plate (203a), and the T-shaped bulge (203b-1) is matched with the second track groove (203 a-1).
12. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 11, wherein: an intermediate plate (102) is arranged in the box body (100), and 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 are arranged on the intermediate plate (102).
13. The method for implementing automatic power supply transfer of an incompletely configured intelligent distributed system according to claim 11 or 12, wherein: the wiring unit (200) further comprises bearing plates (204) arranged on two sides of the second auxiliary plate (201g), and arc grooves (204a) are formed in the bearing plates (204).
14. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 13, wherein: first chucking wheel (201d) includes roof (201d-1), spliced pole (201d-2) and bottom plate (201d-3), spliced pole (201d-2) are connected roof (201d-1) and bottom plate (201d-3), roof (201d-1) are the circular arc board to the arc length of roof (201d-1) is less than and accomplishes half of circumference.
15. The method for implementing automatic power transfer for an incompletely configured intelligent distributed system as claimed in claim 14, wherein: the connecting column (201d-2) is provided with a plurality of ratchets (201d-21), and the ratchets (201d-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 as claimed in claim 15, wherein: the bottom of the bottom plate (201d-3) is provided with a fifth track groove (201d-31), and the second auxiliary plate (201g) is provided with a limiting column (201g-1) matched with the fifth track groove (201 d-31).
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| CN114142447B (en) | 2023-11-28 |
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