CN117498329A - Main transformer low-voltage switch control loop of sectional bus - Google Patents
Main transformer low-voltage switch control loop of sectional bus Download PDFInfo
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- CN117498329A CN117498329A CN202311464083.5A CN202311464083A CN117498329A CN 117498329 A CN117498329 A CN 117498329A CN 202311464083 A CN202311464083 A CN 202311464083A CN 117498329 A CN117498329 A CN 117498329A
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- 238000012790 confirmation Methods 0.000 claims abstract description 48
- 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 4
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
Abstract
The main transformer low-voltage switch control loop of the sectional bus provided by the embodiment of the invention comprises a first bus and a second bus, wherein a sectional switch is connected between the first bus and the second bus; the wire inlet end of the first bus is connected with a first main transformer low switch; according to the technical scheme, the working condition confirmation passage is conducted when the sectional bus meets the preset working condition switching condition, so that the main transformer low-voltage switch opening is controlled, the problem that accidents occur when an operator controls the main transformer low-voltage switch opening due to the fact that the operator does not meet the preset working condition switching condition when the main transformer low-voltage switch opening is controlled by manpower is solved, the safety of working condition conversion is improved, and risks are reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of sectional buses, in particular to a main transformer low-voltage 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 main transformer low 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 main transformer low-voltage switch is in a closing state, the other main transformer low-voltage switch is in a separating state, and the sectional switch is in a closing state. Therefore, the main transformer low-voltage switch plays a crucial role in a single bus segment wiring mode, and the opening and closing state of the main transformer low-voltage switch is determined by the current operation mode.
When the working condition is to be switched, whether the current sectional bus meets the switching condition or not needs to be judged, then the main transformer low-voltage switch is switched off, the prior art is often determined manually, for example, when one main transformer low-voltage switch needs to be subjected to power failure maintenance, two sections of buses need to be switched from the split operation to the parallel operation, an operator needs to first switch on the sectional switch and then switch off the main transformer low-voltage switch needing to be subjected to power failure, and because the main transformer low-voltage switch does not have an electric locking loop, the main transformer low-voltage switch needing to be subjected to power failure is switched off on the premise that the sectional switch is not switched on when the operator is negligent, accidents are easy to cause, and dangers occur.
Disclosure of Invention
The invention provides a main transformer low-voltage switch control loop of a sectional bus, which is used for switching on the control loop when the sectional bus meets the condition of switching to a preset working condition so as to switch off the main transformer low, thereby improving the safety of working condition conversion and reducing the risk.
In a first aspect, an embodiment of the present invention provides a main transformer low-switching 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 wire inlet end of the first bus is connected with a first main transformer low switch;
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 switching-off coil is connected with the first main transformer low-voltage switch, and when any one working condition confirmation passage is conducted, the switching-off coil controls the first main transformer low-voltage switch to switch off.
Optionally, the device further comprises a contact of a first main transformer low-voltage switch, wherein the contact of the first main transformer low-voltage switch is located between the working condition confirmation path and the opening coil and is conducted when the first main transformer low-voltage 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 first main transformer low-voltage switch to be separated.
Optionally, one end of the first main transformer low switch is connected with a first disconnecting link, and the other end of the first main transformer low switch is connected with a second disconnecting link; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a far-near working condition switching handle;
the remote control working condition is a field remote control brake-separating working condition; the remote control working condition passage is a field remote control brake-separating working condition passage;
the on-site remote control opening working condition passage comprises a normally open contact of the far and near working condition switching handle, a normally closed contact of a first disconnecting link and a normally closed contact of a second disconnecting link;
when the on-site remote control opening working condition passage is conducted, the opening coil controls the first main transformer to become low-switching opening.
Optionally, the incoming line end of the second bus is connected with a second main transformer low-voltage switch, the remote control working condition is a split-to-parallel working condition, and the remote control working condition passage is a split-to-parallel working condition passage;
the split-column-to-parallel working condition passage comprises a normally open contact of a far-near working condition switching handle, a normally open contact of a sectionalizing switch and a normally open contact of a second main transformer low-voltage switch;
when the branch-to-parallel working condition passage is conducted, the brake separating coil controls the first main transformer to become low-voltage switch brake separating.
Optionally, an outlet end of the first bus is connected with a first outlet and a second outlet; the first outgoing line is connected with a first outgoing line switch, and the second outgoing line is connected with a second outgoing line switch; the outlet end of the second bus is connected with a third outlet and a fourth outlet; the third outgoing line is connected with a third outgoing line switch, and the fourth outgoing line is connected with a fourth outgoing line switch; the remote control working condition is a first bus off-line working condition of the split-train rotation; the remote control working condition passage is a first bus off-operation working condition passage which is divided into columns;
the branch switching first bus off-state passage comprises a normally closed contact of a far-near working condition switching handle, a normally closed contact of a sectionalizing switch, a normally closed contact of a first outgoing line switch and a normally closed contact of a second outgoing line switch;
when the branch-switching first bus off working condition passage is conducted, the switching-off coil controls the first main transformer to become low-switching off.
Optionally, the remote control working condition is a reverse supply working condition; the switch cabinet comprises a locking switching handle; 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 first main transformer to become low-voltage switch brake separating.
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 channel is multiplexed into a protection signal input end;
the protection tripping working condition passage is conducted when the sectional bus is in a protection tripping working condition;
when the protection tripping working condition passage is conducted, the opening coil controls the first main transformer to become low-voltage switch opening.
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 first main transformer to become low-voltage switch brake separating.
Optionally, 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 working condition 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 switching button;
when the close control working condition passage is conducted, the brake separating coil controls the first main transformer to become low-voltage switch brake separating.
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 first main transformer to become low-switching brake-off.
The main transformer low-voltage switch control loop of the sectional bus provided by the embodiment of the invention comprises a first bus and a second bus, wherein a sectional switch is connected between the first bus and the second bus; the wire inlet end of the first bus is connected with a first main transformer low switch; 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 switching-off coil is connected with the first main transformer low switch, and when any working condition confirms that the passage is conducted, the switching-off coil controls the first main transformer low switch to switch off; according to the technical scheme, the working condition confirmation passage is conducted when the sectional bus meets the preset working condition switching condition, so that the main transformer low-voltage switch is controlled to be switched off, the problem that accidents occur when the operating error of an operator does not meet the preset working condition switching condition due to the fact that the main transformer low-voltage switch is controlled to be switched off by manpower is solved, the safety of working condition conversion is improved, and risks are 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 main transformer low-voltage switch control loop of a segmented bus provided by an embodiment of the 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 main transformer low-switching control loop diagram 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 incoming line end of the first busbar M1 is connected with a first main transformer low-voltage switch DL1; 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 switching-off coil Y3 is connected with the first main transformer low-voltage switch DL1, and controls the switching-off of the first main transformer low-voltage switch DL1 when any one working condition confirmation channel is conducted.
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 first main transformer low-voltage switch DL1 needs to be opened, but before switching the working conditions, it needs to be determined 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, under the electromagnetic action after the power is applied, the electric energy is converted into mechanical energy, so that an armature of the opening coil Y3 impacts the opening operation mechanism of the circuit breaker, thereby controlling the opening of the first main transformer low-voltage switch DL 1.
The main transformer low-voltage switch control loop of the sectional bus provided by the embodiment of the invention comprises a first bus and a second bus, wherein a sectional switch is connected between the first bus and the second bus; the wire inlet end of the first bus is connected with a first main transformer low switch; 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 switching-off coil is connected with the first main transformer low switch, and when any working condition confirms that the passage is conducted, the switching-off coil controls the first main transformer low switch to switch off; according to the technical scheme, the working condition confirmation passage is conducted when the sectional bus meets the preset working condition switching condition, so that the main transformer low-voltage switch is controlled to be switched off, the problem that accidents occur when the operating error of an operator does not meet the preset working condition switching condition due to the fact that the main transformer low-voltage switch is controlled to be switched off by manpower is solved, the safety of working condition conversion is improved, and risks are reduced.
Optionally, referring to fig. 2, the switching device further includes a contact DL13-4 of the first main transformer low switch DL1, where the contact DL13-4 of the first main transformer low switch is located between the working condition confirmation path and the switching coil Y3, and is turned on when the first main transformer low switch DL1 is closed.
Specifically, when the split bus is switched under the working condition, the first main transformer low switch DL1 needs to be switched, and before the switching, the first main transformer low switch DL1 needs to be ensured to be at the switching-on position, so that the control loop further comprises a contact DL13-4 of the first main transformer low switch DL1, which is turned on when the first main transformer low switch DL1 is switched on, and at the moment, the switching-off coil Y3 is powered on, so that the first main transformer low switch DL1 can be switched off.
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 opening coil controls the first main transformer to become low-switching opening.
In an alternative embodiment of the present invention, referring to fig. 1, one end of a first main transformer low switch DL1 is connected to a first disconnecting link 1G, and the other end of the first main transformer low switch DL1 is connected to a second disconnecting link 4G; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a far-near working condition switching handle; the remote control working condition is a field remote control brake-separating working condition; the remote control working condition passage is a field remote control brake-separating working condition passage; the on-site remote control opening working condition passage comprises a normally open contact QK13-4 of a remote and near working condition switching handle, a normally closed contact of a first disconnecting link 1G and a normally closed contact of a second disconnecting link 4G; when the on-site remote control opening working condition passage is conducted, the opening coil Y3 controls the first main transformer low-voltage switch DL1 to open.
Specifically, when the remote opening of the switch is needed in the low-voltage switch overhaul site, a user can switch to a remote control position through controlling the switching handle, at the moment, the normally open contact QK13-4 of the remote and near working condition switching handle is closed, an operator inputs a remote control opening command from the remote control signal input end X1 through the measurement and control device at a background machine or a measurement and control screen, in the loop, the normally closed contact 1G 5-6 of the first disconnecting link 1G and the normally closed contact 4G 5-6 of the second disconnecting link 4G are connected, the remote control operation of the switch in the outage state (namely, the first disconnecting link 1G and the second disconnecting link 4G are both in the opening position) is ensured, namely, the opening coil Y3 is electrified, the first main transformer low-voltage switch DL1 is controlled to open, and the operation of a transmission switch and the like of the switch in the overhaul state can be met.
In an alternative embodiment of the present invention, referring to fig. 1, the incoming line end of the second busbar M2 is connected to the second main transformer low switch DL2, and the remote control working condition is a split-to-parallel working condition, and the remote control working condition path is a split-to-parallel working condition path; the branch-to-parallel working condition passage comprises a normally open contact QK11-2 of a far and near working condition switching handle, a normally open contact DL33-4 of a sectionalizing switch and a normally open contact DL23-4 of a second main transformer low-voltage switch; when the passage of the working condition of the split switching parallel is conducted, the split switching coil controls the first main transformer to become low-switching split.
Specifically, referring to fig. 1, the normal split operation, that is, the first main transformer low switch DL1 is closed, the second main transformer low switch DL2 is closed, the segment switch DL3 is opened, (the first main transformer low switch DL1 is operated with the first bus M1, the second main transformer low switch DL2 is operated with the second bus M2) is converted into the normal parallel operation, that is, the first main transformer low switch DL1 is opened, the second main transformer low switch DL2 is closed, the segment switch DL3 is closed, (the second main transformer low switch DL2 is operated with the first bus M1 and the second bus M2), the segment switch DL3 is closed after confirming that the second main transformer low switch DL2 is in the closed position, and then the first main transformer low switch DL1 is opened.
In an alternative embodiment of the present invention, referring to fig. 1, an outlet end of a first busbar M1 is connected to a first outlet M11 and a second outlet M12; the outlet end of the second bus M2 is connected with a third outlet M21 and a fourth outlet M22; the remote control working condition is a first busbar outage working condition of the split-train switching; the remote control working condition passage is a first bus off-line working condition passage which is divided into rows; the branch-switching first bus off-line working condition passage comprises a normally-closed contact QK13-4 of a far-near working condition switching handle, a normally-closed contact DL31-2 of a sectionalizing 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 branch-to-first bus off-line working condition passage is conducted, the switching-off coil Y3 controls the first main transformer to become low-switching off.
Specifically, when the first bus off-line working condition passage is in the split state, after confirming that the sectionalized switch DL3 switch is in the split state, the switch DL5 of the first outgoing line M11 switch DL4 and the second outgoing line M12 is disconnected, and finally the first main transformer low-voltage switch DL1 is disconnected, namely, the sectionalized switch DL3, the first outgoing line switch DL4 and the second outgoing line switch DL5 are all in the split state, and then DL1 is disconnected, so that the sectionalized first bus off-line working condition passage comprises the normally closed contact DL31-2 of the sectionalized switch, the normally closed contact DL41-2 of the first outgoing line switch and the normally closed contact DL51-2 of the second outgoing line switch, the passage can be conducted only when the sectionalized switch DL3, DL4 and DL5 are all in the split state, the split coil Y3 can be electrified, and the first main transformer low-voltage switch DL1 can be disconnected, and accidents caused by the fact that the sectionalized switch DL3 is in the split state, the first outgoing line switch DL4 or the second outgoing line switch DL5 is disconnected in the split state are avoided.
In an alternative embodiment of the present invention, referring to FIG. 2, the remote control condition is an inverted supply condition; the switch cabinet comprises a locking switching handle; 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 switching-off coil Y3 controls the first main transformer low-voltage switch DL1 to switch off.
Specifically, DL1 with the first bus M1 is changed into the first outlet switch DL4 or the second outlet switch DL5 with the first bus M1, and the operation mode belongs to a special mode, at this time, the locking switching handle needs to be switched to the unlocking position, at this time, the normally open contact QK23-4 of the locking switching handle is closed, and the electrical closed loop of the switch is released, so as to achieve the purpose of opening the switch.
Optionally, the preset working condition includes a protection signal working condition, and the working condition confirmation path includes a protection trip working condition path; under the protection tripping working condition, the positive electrode end of the control channel is multiplexed into a protection signal input end X2; when the protection trip working condition passage is conducted, the opening coil controls the first main transformer to become low-voltage switch opening.
Specifically, when the protection device (not shown in the figure) detects that the segmented 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 electrified, and the first main transformer low-voltage switch DL1 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 opening coil controls the first main transformer to become low-switching opening.
Illustratively, the switch cabinet comprises a close control brake-separating button (not shown in the figure) 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 working condition switching handle, a normally closed contact 1G 1-2 of a first disconnecting link, a normally closed contact 4G 1-2 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 opening coil Y3 controls the first main transformer low-voltage switch DL1 to open.
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 first main transformer low-voltage switch DL1 is controlled to be immediately switched off. In the loop, the normally-closed contacts 1G 1-2 of the first disconnecting link and the normally-closed contacts 4G 1-2 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 opening working condition passage is conducted, the opening coil Y3 controls the first main transformer low-voltage switch DL1 to open.
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 switch-off button is pressed, the normally open contact S23-4 of the on-site emergency switch-off button is closed, the on-site emergency switch-off working condition passage is switched on, the switch-off coil Y3 is powered on, and the first main transformer low-voltage switch DL1 is controlled to be immediately switched off.
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 main transformer low-voltage 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 wire inlet end of the first bus is connected with a first main transformer low switch;
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 switching-off coil is connected with the first main transformer low-voltage switch, and when any one working condition confirmation passage is conducted, the switching-off coil controls the first main transformer low-voltage switch to switch off.
2. The control circuit of claim 1, further comprising a junction of a first main transformer low switch located between the condition confirmation path and the opening coil and turned on when the first main transformer low switch 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 first main transformer low-voltage switch to be separated.
4. The control loop according to claim 3, wherein one end of the first main transformer low switch is connected to a first disconnecting link, and the other end of the first main transformer low switch is connected to a second disconnecting link; the control loop is arranged in a switch cabinet, and the switch cabinet comprises a far-near working condition switching handle;
the remote control working condition is a field remote control brake-separating working condition; the remote control working condition passage is a field remote control brake-separating working condition passage;
the on-site remote control opening working condition passage comprises a normally open contact of the far and near working condition switching handle, a normally closed contact of a first disconnecting link and a normally closed contact of a second disconnecting link;
when the on-site remote control opening working condition passage is conducted, the opening coil controls the first main transformer to become low-switching opening.
5. The control loop of claim 4, wherein the incoming line end of the second bus is connected with a second main transformer low-voltage switch, the remote control working condition is a split-to-parallel working condition, and the remote control working condition passage is a split-to-parallel working condition passage;
the split-column-to-parallel working condition passage comprises a normally open contact of a far-near working condition switching handle, a normally open contact of a sectionalizing switch and a normally open contact of a second main transformer low-voltage switch;
when the branch-to-parallel working condition passage is conducted, the brake separating coil controls the first main transformer to become low-voltage switch brake separating.
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 first outgoing line is connected with a first outgoing line switch, and the second outgoing line is connected with a second outgoing line switch; the outlet end of the second bus is connected with a third outlet and a fourth outlet; the third outgoing line is connected with a third outgoing line switch, and the fourth outgoing line is connected with a fourth outgoing line switch; the remote control working condition is a first bus off-line working condition of the split-train rotation; the remote control working condition passage is a first bus off-operation working condition passage which is divided into columns;
the branch switching first bus off-state passage comprises a normally closed contact of a far-near working condition switching handle, a normally closed contact of a sectionalizing switch, a normally closed contact of a first outgoing line switch and a normally closed contact of a second outgoing line switch;
when the branch-switching first bus off working condition passage is conducted, the switching-off coil controls the first main transformer to become low-switching off.
7. The control circuit of claim 4, wherein the remote control condition is a reverse supply condition; the switch cabinet comprises a locking switching handle; 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 first main transformer to become low-voltage switch brake separating.
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 channel is multiplexed into a protection signal input end;
the protection tripping working condition passage is conducted when the sectional bus is in a protection tripping working condition;
when the protection tripping working condition passage is conducted, the opening coil controls the first main transformer to become low-voltage switch opening.
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 first main transformer to become low-voltage switch brake separating.
10. The control loop of claim 9, wherein the switch cabinet includes a close-controlled brake release button and a condition switching handle;
under the close control working condition, the close control working condition passage comprises a normally closed contact of a working condition 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 switching button;
when the close control working condition passage is conducted, the brake separating coil controls the first main transformer to become low-voltage switch brake separating.
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 first main transformer to become low-switching brake-off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311464083.5A CN117498329A (en) | 2023-11-06 | 2023-11-06 | Main transformer low-voltage switch control loop of sectional bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311464083.5A CN117498329A (en) | 2023-11-06 | 2023-11-06 | Main transformer low-voltage switch control loop of sectional bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117498329A true CN117498329A (en) | 2024-02-02 |
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ID=89672153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311464083.5A Pending CN117498329A (en) | 2023-11-06 | 2023-11-06 | Main transformer low-voltage switch control loop of sectional bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117498329A (en) |
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2023
- 2023-11-06 CN CN202311464083.5A patent/CN117498329A/en active Pending
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