CN117498328A - Sectional switch control loop of sectional bus - Google Patents
Sectional switch control loop of sectional bus Download PDFInfo
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- CN117498328A CN117498328A CN202311463700.XA CN202311463700A CN117498328A CN 117498328 A CN117498328 A CN 117498328A CN 202311463700 A CN202311463700 A CN 202311463700A CN 117498328 A CN117498328 A CN 117498328A
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- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The embodiment of the invention provides a sectional switch control loop of a sectional bus, wherein the sectional bus comprises a first bus and a second bus, and a sectional switch is connected between the first bus and the second bus; the control loop comprises a positive electrode end, a negative electrode end, a plurality of working condition confirmation paths and a brake separating coil; the working condition confirmation channels are connected in parallel, and are conducted when the sectional bus is in a preset working condition; the technical scheme of the invention is that the sectional switch is controlled to be opened when the sectional bus meets the preset working condition switching condition through the working condition confirmation passage, so that the sectional switch is controlled to be opened, the problem that accidents occur when the sectional switch is controlled to be opened in advance due to misoperation of operators when the sectional switch is controlled by manpower is solved, the safety of working condition conversion is improved, and the risk is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of sectional buses, in particular to a sectional switch control loop of a sectional bus.
Background
The single bus segment wiring is a wiring mode of dividing a switch for one section bus into two sections or more sections and connecting the segment bus with a segment switch for the other section bus, and has the advantages that: 1) The two sections of buses can run in a separated mode or in parallel mode; 2) Important users can connect different bus segments by double loops, so that uninterrupted power supply is ensured; 3) Any bus or isolating switch is overhauled, only the section is stopped, other sections can continue to supply power, and the power failure range is reduced. Compared with the single bus which is not segmented, the reliability and the flexibility are improved, so that the wiring mode is widely applied to 10kV-220KV power distribution devices.
When the two sections of buses are in split operation, the two sections of bus power supply inlet switches are respectively in a closing state, and the sectionalizing switches are in a separating state; when two sections of buses are in parallel operation, one section of bus power supply inlet wire switch is in a closing state, the other section of bus power supply inlet wire switch is in a separating brake state, the sectional switch is in a closing state, the sectional switch plays a crucial role in a single-bus sectional wiring mode, and the separating brake state is determined by the current operation working condition.
When the switching of working conditions is required to be realized, whether the current sectional bus meets the switching conditions or not needs to be judged, then the sectional bus is switched off, the prior art is often determined manually, for example, when a certain section of bus power supply inlet wire switch needs to be overhauled in a power failure mode, two sections of buses need to be switched into parallel operation from the split operation mode, an operator needs to first switch on the sectional switch and then switch off the power supply inlet wire switch needing to be powered off, and when the operator is careless, the power supply inlet wire switch needing to be powered off is disconnected under the premise that the sectional switch is not switched on, so that accidents are easy to cause and risks occur.
Disclosure of Invention
The invention provides a sectional switch control loop of a sectional bus, which is used for switching on the control loop to further switch off a sectional switch when the sectional bus meets the condition of switching to a preset working condition, so that the safety of working condition conversion is improved, and the risk is reduced.
In a first aspect, an embodiment of the present invention provides a segmented switch control loop of a segmented bus, where the segmented bus includes a first bus and a second bus, and a segmented switch is connected between the first bus and the second bus; the control loop comprises a positive electrode end, a negative electrode end, a plurality of working condition confirmation paths and a brake separating coil; the working condition confirmation channels are connected in parallel, one end of each working condition confirmation channel is connected with the positive electrode end, the other end of each working condition confirmation channel is connected with the brake separating coil, and the other end of each brake separating coil is connected with the negative electrode end; the working condition confirmation passage is conducted when the segmented bus is in a preset working condition; the brake-separating coil is connected with the sectional switch, and when any one working condition confirmation passage is conducted, the sectional switch is controlled to be separated.
Optionally, the device further comprises a contact of a sectionalizing switch, wherein the contact of the sectionalizing switch is positioned between the working condition confirmation passage and the opening coil and is conducted when the sectionalizing switch is closed.
Optionally, the preset working condition includes a remote control working condition; the working condition confirmation path comprises a remote control working condition path;
under the remote control working condition, the positive electrode end of the control loop is multiplexed into a remote control signal input end; the remote control working condition passage is conducted when the segmented bus is in a remote control working condition;
when the remote control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Optionally, the control loop is arranged in a switch cabinet, and the switch cabinet comprises a far-near working condition switching handle; the wire inlet end of the first bus is connected with a first main transformer low-voltage switch, and the wire inlet end of the second bus is connected with a second main transformer low-voltage switch; the remote control working condition is a parallel-to-split working condition; the remote control working condition passage is a parallel-to-separate working condition passage;
the parallel switching and separating working condition passage comprises a normally open contact of a working condition switching handle, a normally open contact of a first main transformer low-voltage switch and a normally open contact of a second main transformer low-voltage switch;
when the parallel switching and separating working condition passage is conducted, the separating coil controls the separating of the sectional switch.
Optionally, an outlet end of the second bus is connected with a third outlet and a fourth outlet; the remote control working condition is a parallel-rotation second bus off-operation working condition; the remote control working condition passage is a parallel-rotation second bus off-operation working condition passage;
the parallel-rotation second bus off-operation working condition passage comprises a normally-closed contact of a working condition switching handle, a normally-closed contact of a second main transformer low-voltage switch, a normally-closed contact of a third outgoing line switch and a normally-closed contact of a fourth outgoing line switch;
when the parallel second bus off-line working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Optionally, an outlet end of the first bus is connected with a first outlet and a second outlet; the remote control working condition is a parallel-rotation first bus off-operation working condition; the remote control working condition passage is a parallel-rotation first bus off-operation working condition passage;
the parallel-rotation first bus off-operation working condition passage comprises a normally-closed contact of a working condition switching handle, a normally-closed contact of a first main transformer low-voltage switch, a normally-closed contact of a first outgoing line switch and a normally-closed contact of a second outgoing line switch;
when the parallel-rotation first bus off-operation working condition passage is conducted, the brake separating coil controls the sectional switch to separate brake.
Optionally, the switch cabinet comprises a locking switch handle; the remote control working condition is an inverted supply working condition; the remote control working condition passage is an inverted supply working condition passage;
the reverse supply working condition passage comprises a normally closed contact of a working condition switching handle and a normally open contact of a locking switching handle;
when the reverse supply working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Optionally, the preset operating condition includes a protection trip operating condition, and the operating condition confirmation path includes a protection trip operating condition path;
under the protection tripping working condition, the positive electrode end of the control loop is multiplexed into a protection signal input end;
when the protection trip working condition including passage is conducted, the brake separating coil controls the sectional switch to separate brake.
Optionally, the preset working condition includes a near control working condition; the working condition confirmation path comprises a near control working condition path;
the near control working condition passage is conducted when the segmented bus is in a near control working condition;
when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Optionally, one end of the sectional switch is connected with a first disconnecting link, and the other end of the sectional switch is connected with a second disconnecting link; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a close control brake-separating button and a working condition switching handle;
under the close control working condition, the close control working condition passage comprises a normally-closed contact of a switching handle, a normally-closed contact of a first disconnecting link, a normally-closed contact of a second disconnecting link and a normally-open contact of a close control switch-off button;
when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Optionally, the preset working condition comprises an on-site emergency brake-separating working condition; the switch cabinet comprises an on-site emergency brake separating button; the working condition confirmation path comprises an on-site emergency brake-separating working condition path;
the on-site emergency brake-off working condition passage comprises a contact point of an on-site emergency brake-off button;
when the on-site emergency brake-off working condition passage is conducted, the brake-off coil controls the segmented switch to brake off.
The embodiment of the invention provides a sectional switch control loop of a sectional bus, wherein the sectional bus comprises a first bus and a second bus, and a sectional switch is connected between the first bus and the second bus; the control loop comprises a positive electrode end, a negative electrode end, a plurality of working condition confirmation paths and a brake separating coil; the working condition confirmation channels are connected in parallel, one end of each working condition confirmation channel is connected with the positive electrode end, the other end of each working condition confirmation channel is connected with the brake separating coil, and the other end of each brake separating coil is connected with the negative electrode end; the working condition confirmation passage is conducted when the segmented bus is in a preset working condition; the brake-separating coil is connected with the sectional switch, and when the conduction of the passage is confirmed under any working condition, the sectional switch is controlled to separate brake; according to the technical scheme, the sectional bus is conducted when the sectional bus meets the preset working condition switching condition through the working condition confirmation channel, and then the sectional switch is controlled to be opened, so that the problem that accidents occur when the sectional switch is controlled to be opened due to misoperation of operators when the preset working condition switching condition is not met when the sectional switch is controlled by manpower is solved, the safety of working condition conversion is improved, and the risk is reduced.
Drawings
FIG. 1 is a schematic diagram of a connection of a segmented bus provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a control loop of a sectionalizing switch of a sectionalizing bus according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that, the terms "upper", "lower", "left", "right", and the like in the embodiments of the present invention are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in the context, it will also be understood that when an element is referred to as being formed "on" or "under" another element, it can be directly formed "on" or "under" the other element or be indirectly formed "on" or "under" the other element through intervening elements. The terms "first," "second," and the like, are used for descriptive purposes only and not for any order, quantity, or importance, but rather are used to distinguish between different components. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The term "comprising" and variants thereof as used herein is intended to be open ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment".
It should be noted that the terms "first," "second," and the like herein are merely used for distinguishing between corresponding contents and not for defining a sequential or interdependent relationship.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those skilled in the art will appreciate that "one or more" is intended to be construed as "one or more" unless the context clearly indicates otherwise.
Fig. 1 is a schematic connection diagram of a sectional bus provided by an embodiment of the present invention, fig. 2 is a schematic sectional switch control circuit of a sectional bus provided by an embodiment of the present invention, and referring to fig. 1 and fig. 2, the sectional bus includes a first bus M1 and a second bus M2, and a sectional switch DL3 is connected between the first bus M1 and the second bus M2; the control loop comprises a positive electrode +KM, a negative electrode-KM, a plurality of working condition confirmation paths and a brake-separating coil Y3; the working condition confirmation channels are connected in parallel, one end of each working condition confirmation channel is connected with the positive electrode end +KM, the other end of each working condition confirmation channel is connected with the brake-separating coil Y3, and the other end of the brake-separating coil Y3 is connected with the negative electrode end-KM; the working condition confirmation passage is conducted when the segmented bus is in a preset working condition; the brake-separating coil Y3 is connected with the sectionalizing switch DL3, and when any working condition confirms that the passage is conducted, the sectionalizing switch DL3 is controlled to be switched off.
Specifically, referring to fig. 1, when the sectional bus operates, various working conditions are included, and when switching between working conditions is to be realized, the sectional switch DL3 needs to be opened, but before the working conditions are switched, it is required to determine that the sectional bus meets the switching condition, that is, the working condition confirmation path is in a conducting state, and only when the sectional bus meets the working condition switching condition, the corresponding working condition confirmation path is conducted, the opening coil Y3 is powered on, and under the electromagnetic action after power is applied, the electric energy is converted into mechanical energy, so that the armature of the opening coil Y3 impacts the opening operation mechanism of the circuit breaker, thereby controlling the opening of the sectional switch DL 3.
The embodiment of the invention provides a sectional switch control loop of a sectional bus, wherein the sectional bus comprises a first bus and a second bus, and a sectional switch is connected between the first bus and the second bus; the control loop comprises a positive electrode end, a negative electrode end, a plurality of working condition confirmation paths and a brake separating coil; the working condition confirmation channels are connected in parallel, one end of each working condition confirmation channel is connected with the positive electrode end, the other end of each working condition confirmation channel is connected with the brake separating coil, and the other end of each brake separating coil is connected with the negative electrode end; the working condition confirmation passage is conducted when the segmented bus is in a preset working condition; the technical scheme of the invention is that the sectional switch is controlled to be opened when the sectional bus meets the preset working condition switching condition through the working condition confirmation passage, so that the sectional switch is controlled to be opened, the problem that accidents occur when the sectional switch is controlled to be opened in advance due to misoperation of operators when the sectional switch is controlled by manpower is solved, the safety of working condition conversion is improved, and the risk is reduced.
Optionally, referring to fig. 2, the control loop further includes a contact of the sectionalizing switch DL3, where the contact of the sectionalizing switch is located between the condition-confirming path and the switching-off coil Y3, and is turned on when the sectionalizing switch DL3 is closed.
Specifically, when the sectional bus is switched, the sectional switch DL3 needs to be opened, and before the opening, the sectional switch DL3 needs to be ensured to be at the closing position, so that the control loop further includes a contact DL33-4 of the sectional switch DL3, which is turned on when the sectional switch DL3 is closed, and at this time, the opening coil Y3 is powered on, so that the sectional switch DL3 can be opened.
Optionally, the preset working condition includes a remote control working condition; the working condition confirmation path comprises a remote control working condition path; under the remote control working condition, the positive electrode end of the control loop is multiplexed into a remote control signal input end X1; the remote control working condition passage is conducted when the segmented bus is in a remote control working condition; when the remote control working condition passage is conducted, the brake separating coil Y3 controls the sectionalizing switch DL3 to separate brake.
In an alternative embodiment of the invention, the control loop is arranged in a switch cabinet, and the switch cabinet comprises a far-near working condition switching handle; the wire inlet end of the first busbar M1 is connected with a first main transformer low-voltage switch DL1, and the wire inlet end of the second busbar M2 is connected with a second main transformer low-voltage switch DL2; the remote control working condition is a parallel-to-split working condition; the remote control working condition passage is a parallel-to-split working condition passage; the parallel switching and separating working condition passage comprises a normally open contact QK11-2 of a working condition switching handle, a normally open contact DL13-4 of a first main transformer low switch and a normally open contact DL23-4 of a second main transformer low switch; when the parallel switching and splitting working condition passage is conducted, the split-gate coil controls the split-gate of the sectional switch.
Specifically, normal parallel operation, namely, the first main transformer low-voltage switch DL1 is switched off, the second main transformer low-voltage switch DL2 is switched on, the sectionalized switch DL3 is switched on, (the second main transformer low-voltage switch DL2 is operated with the first bus M1 and the second bus M2) or the first main transformer low-voltage switch DL1 is switched on, the second main transformer low-voltage switch DL2 is switched off, the sectionalized switch DL3 is switched on, (the first main transformer low-voltage switch DL1 is operated with the first bus M1 and the second bus M2), the transition normal split operation, namely, the first main transformer low-voltage switch DL1 is switched on, the second main transformer low-voltage switch DL2 is switched on, the sectionalized switch DL3 is switched off, (the first main transformer low-voltage switch DL1 is operated with the first bus M1, the second main transformer low-voltage switch DL2 is operated with the second bus M2), the first main transformer low-voltage switch DL1 and the second main transformer low-voltage switch DL2 are required to be switched on, the sectionalized switch DL3 is switched off, in order to prevent misoperation, the transition split operation working conditions comprise normally open connection points of the sectionalized switch low-voltage switch DL11, the first main transformer low-voltage switch DL2 is switched off, the normally open connection point is switched on at the first main transformer low-voltage switch 2, the normally-voltage switch low-voltage switch 3 is switched off, and normally open connection point is ensured, and normally open connection is switched on at the first main switch low-voltage switch 3, and normally switch 3 is switched on.
Optionally, the outlet end of the second busbar M2 is connected to the third outlet M21 and the fourth outlet M22; the remote control working condition is a parallel-rotation second bus off-operation working condition; the remote control working condition passage is a parallel-rotation second bus off-operation working condition passage; the parallel-rotation second bus off-operation working condition passage comprises a normally-closed contact QK13-4 of a working condition switching handle, a normally-closed contact DL21-2 of a second main transformer low-voltage switch, a normally-closed contact DL61-2 of a third outgoing line switch and a normally-closed contact DL71-2 of a fourth outgoing line switch; when the parallel second bus off-line working condition passage is conducted, the brake separating coil Y3 controls the sectional switch to separate brake.
For example, the first main transformer low-voltage switch DL1 is turned into the second bus M2 to stop operation, and the third outgoing switch DL6 and the fourth outgoing switch DL7 are required to be turned off first, that is, the second main transformer low-voltage switch DL2, the third outgoing switch DL6 and the fourth outgoing switch DL7 are all at the opening position, and then the sectionalizing switch DL3 is turned off, so that in order to prevent misoperation, the parallel-turning second bus off condition path includes a normally closed contact QK13-4 of the condition switching handle, a normally closed contact DL21-2 of the second main transformer low-voltage switch, a normally closed contact DL61-2 of the third outgoing switch and a normally closed contact DL71-2 of the fourth outgoing switch, and the sectionalizing operation of the sectionalizing switch DL3 can be performed only when the second main transformer low-voltage switch DL2, the third outgoing switch DL6 and the fourth outgoing switch DL7 are all at the opening position, thereby avoiding the occurrence of a third fault or a fourth fault.
Optionally, an outlet end of the first busbar M1 is connected to the first outlet M11 and the second outlet M12; the remote control working condition is a parallel-rotation first bus off-operation working condition; the remote control working condition passage is a parallel-rotation first bus off-operation working condition passage; the parallel-rotation first bus off-operation working condition passage comprises a normally-closed contact QK13-4 of a working condition switching handle, a normally-closed contact DL11-2 of a first main transformer low-voltage switch, a normally-closed contact DL41-2 of a first outgoing line switch and a normally-closed contact DL51-2 of a second outgoing line switch; when the parallel first bus off-operation working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
For example, when the second main transformer low-voltage switch DL2 is switched to the first bus M1 to stop operation, the first outgoing line switch DL4 and the second outgoing line switch DL5 are required to be disconnected first, that is, the first main transformer low-voltage switch DL1, the first outgoing line switch DL4 and the second outgoing line switch DL5 are all at the switch-off position, and then the sectionalized switch DL3 is disconnected, in order to prevent misoperation, the normally-closed contact DL41-2 of the first outgoing line switch, the normally-closed contact DL51-2 of the second outgoing line switch and the normally-closed contact DL11-2 of the first main transformer low-voltage switch are added in the parallel operation path of the first bus, so that the first main transformer low-voltage switch DL1, the first outgoing line switch DL4 and the second outgoing line switch DL5 can be disconnected when all at the switch-off position, and the sectionalized switch DL3 is prevented from being disconnected when all at the switch-off position, thereby avoiding the first outgoing line or second outgoing line accident.
Optionally, the switch cabinet comprises a locking switch handle; the remote control working condition is an inverted supply working condition; the remote control working condition passage is an inverted supply working condition passage; the reverse supply working condition passage comprises a normally closed contact QK13-4 of the working condition switching handle and a normally open contact QK23-4 of the locking switching handle; when the reverse supply working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Specifically, the reverse supply working condition is that the operation of the first main transformer low-voltage switch DL1 is changed into the operation of the first main transformer low-voltage switch DL1 with the first bus M1 and the operation of the third outlet switch DL6 or the fourth outlet switch DL7 is changed into the operation of the second bus M2, or the operation of the second main transformer low-voltage switch DL2 with the first bus M1 and the operation of the second bus M2 is changed into the operation of the second main transformer low-voltage switch DL2 with the second bus M2 and the operation of the first outlet switch DL4 or the second outlet switch DL5 is changed into the operation of the first bus M1.
Optionally, the preset operating condition includes a protection trip operating condition, and the operating condition confirmation path includes a protection trip operating condition path; under the protection tripping working condition, the positive electrode end of the control loop is multiplexed into a protection signal input end X2; the protection trip condition path comprises a normally open contact DL33-4 of a sectionalizer; when the protection trip condition passage is conducted, the brake separating coil controls the sectionalizing switch to separate the brake.
Specifically, when the protection device (not shown in the figure) detects that the sectional bus needs to be protected, a protection signal is output, the positive end of the control channel is multiplexed into a protection signal input end X2, the protection signal channel is conducted after receiving the protection signal, the brake-separating coil Y3 is powered on, and the sectional switch DL3 is controlled to be immediately brake-separated.
Optionally, the preset operating condition includes a near control operating condition; the working condition confirmation path comprises a near control working condition path; the close control working condition passage is conducted when the segmented bus is in a close control working condition; when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
In an alternative embodiment of the present invention, referring to fig. 1, one end of a sectionalizing switch DL3 is connected to a first disconnecting link 1G, and the other end of the sectionalizing switch is connected to a second disconnecting link 2G; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a close control brake-separating button and a working condition switching handle; under a close control working condition, the close control working condition passage comprises a normally closed contact QK11-2 of a switching handle, a normally closed contact 1G 1-2 of a first disconnecting link, a normally closed contact 2G1-2 of a second disconnecting link and a normally open contact S13-4 of a close control switching-off button; when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
Specifically, when the on-site switching-off of the switch is needed in the low-voltage switch overhaul site, the working condition switching handle is required to be switched to a near control position, and a near control switching-off button is pressed, at the moment, a normally open contact S13-4 of the near control switching-off button and a normally closed contact QK11-2 of the working condition switching handle are closed, a near control working condition passage is conducted, a switching-off coil Y3 is powered on, and the sectionalized switch DL1 is controlled to be switched off immediately. In the loop, the normally-closed contacts 1G 1-2 of the first disconnecting link and the normally-closed contacts 2G1-2 of the second disconnecting link are connected, so that the switch can be in-situ near-control operation only under the stop state (namely, the first disconnecting link and the second disconnecting link are both in the pull-open position), and the risk of explosion of the switch during in-situ operation and running of an operator is avoided.
Optionally, the preset operating condition includes an on-site emergency brake-off operating condition; the switch cabinet comprises an on-site emergency brake-separating button (not shown in the figure); the working condition confirmation path comprises an on-site emergency brake-separating working condition path; the on-site emergency brake-off working condition passage comprises a contact point of an on-site emergency brake-off button; when the on-site emergency brake-off working condition passage is conducted, the brake-off coil Y3 controls the sectionalizing switch DL3 to brake off.
Specifically, when an accident occurs, when the on-site emergency switch of the switch cabinet is required to be turned off, the on-site emergency brake-separating button is pressed, the normally open contact S23-4 of the on-site emergency brake-separating button is closed, the on-site emergency brake-separating working condition passage is connected, the brake-separating coil Y3 is powered on, and the sectionalized switch DL3 is controlled to be immediately brake-separated.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. The sectional switch control loop of the sectional bus is characterized in that the sectional bus comprises a first bus and a second bus, and a sectional switch is connected between the first bus and the second bus;
the control loop comprises a positive electrode end, a negative electrode end, a plurality of working condition confirmation paths and a brake separating coil; the working condition confirmation channels are connected in parallel, one end of each working condition confirmation channel is connected with the positive electrode end, the other end of each working condition confirmation channel is connected with the brake separating coil, and the other end of each brake separating coil is connected with the negative electrode end;
the working condition confirmation passage is conducted when the segmented bus is in a preset working condition;
the brake-separating coil is connected with the sectional switch, and when any one working condition confirmation passage is conducted, the sectional switch is controlled to be separated.
2. The control circuit of claim 1, further comprising a junction of a sectionalizer, the junction of the sectionalizer being located between the condition-confirming passage and the opening coil and being conductive when the sectionalizer is closed.
3. The control circuit of claim 1, wherein the preset operating condition comprises a remote operating condition; the working condition confirmation path comprises a remote control working condition path;
under the remote control working condition, the positive electrode end of the control loop is multiplexed into a remote control signal input end; the remote control working condition passage is conducted when the segmented bus is in a remote control working condition;
when the remote control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
4. A control loop according to claim 3, wherein the control loop is disposed in a switch cabinet, the switch cabinet including a near-far operating mode switching handle; the wire inlet end of the first bus is connected with a first main transformer low-voltage switch, and the wire inlet end of the second bus is connected with a second main transformer low-voltage switch; the remote control working condition is a parallel-to-split working condition; the remote control working condition passage is a parallel-to-separate working condition passage;
the parallel switching and separating working condition passage comprises a normally open contact of a working condition switching handle, a normally open contact of a first main transformer low-voltage switch and a normally open contact of a second main transformer low-voltage switch;
when the parallel switching and separating working condition passage is conducted, the separating coil controls the separating of the sectional switch.
5. The control loop of claim 4, wherein the outlet end of the second bus bar connects a third outlet and a fourth outlet; the remote control working condition is a parallel-rotation second bus off-operation working condition; the remote control working condition passage is a parallel-rotation second bus off-operation working condition passage;
the parallel-rotation second bus off-operation working condition passage comprises a normally-closed contact of a working condition switching handle, a normally-closed contact of a second main transformer low-voltage switch, a normally-closed contact of a third outgoing line switch and a normally-closed contact of a fourth outgoing line switch;
when the parallel second bus off-line working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
6. The control loop of claim 4, wherein the outlet end of the first bus bar connects a first outlet and a second outlet; the remote control working condition is a parallel-rotation first bus off-operation working condition; the remote control working condition passage is a parallel-rotation first bus off-operation working condition passage;
the parallel-rotation first bus off-operation working condition passage comprises a normally-closed contact of a working condition switching handle, a normally-closed contact of a first main transformer low-voltage switch, a normally-closed contact of a first outgoing line switch and a normally-closed contact of a second outgoing line switch;
when the parallel-rotation first bus off-operation working condition passage is conducted, the brake separating coil controls the sectional switch to separate brake.
7. The control loop of claim 4, wherein the switch cabinet includes a lock switch handle; the remote control working condition is an inverted supply working condition; the remote control working condition passage is an inverted supply working condition passage;
the reverse supply working condition passage comprises a normally closed contact of a working condition switching handle and a normally open contact of a locking switching handle;
when the reverse supply working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
8. The control loop of claim 1, wherein the preset operating condition comprises a protection trip operating condition, and the operating condition confirmation path comprises a protection trip operating condition path;
under the protection tripping working condition, the positive electrode end of the control loop is multiplexed into a protection signal input end;
the path comprising the protection tripping working condition is conducted when the sectional bus is in the protection tripping working condition;
when the protection trip working condition including passage is conducted, the brake separating coil controls the sectional switch to separate brake.
9. The control circuit of claim 1, wherein the preset operating condition comprises a near-control operating condition; the working condition confirmation path comprises a near control working condition path;
the near control working condition passage is conducted when the segmented bus is in a near control working condition;
when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
10. The control loop of claim 9, wherein one end of the sectionalizer is connected to a first knife switch, and the other end of the sectionalizer is connected to a second knife switch; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a close control brake-separating button and a working condition switching handle;
under the close control working condition, the close control working condition passage comprises a normally-closed contact of a switching handle, a normally-closed contact of a first disconnecting link, a normally-closed contact of a second disconnecting link and a normally-open contact of a close control switch-off button;
when the close control working condition passage is conducted, the brake separating coil controls the sectional switch to separate the brake.
11. The control circuit of claim 10, wherein the preset operating conditions include an in-situ emergency brake off operating condition; the switch cabinet comprises an on-site emergency brake separating button; the working condition confirmation path comprises an on-site emergency brake-separating working condition path;
the on-site emergency brake-off working condition passage comprises a contact point of an on-site emergency brake-off button;
when the on-site emergency brake-off working condition passage is conducted, the brake-off coil controls the segmented switch to brake off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311463700.XA CN117498328A (en) | 2023-11-06 | 2023-11-06 | Sectional switch control loop of sectional bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311463700.XA CN117498328A (en) | 2023-11-06 | 2023-11-06 | Sectional switch control loop of sectional bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117498328A true CN117498328A (en) | 2024-02-02 |
Family
ID=89670300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311463700.XA Pending CN117498328A (en) | 2023-11-06 | 2023-11-06 | Sectional switch control loop of sectional bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117498328A (en) |
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2023
- 2023-11-06 CN CN202311463700.XA patent/CN117498328A/en active Pending
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