CN117639247A - PT disconnecting link opening and closing control loop of double-bus voltage transformer - Google Patents
PT disconnecting link opening and closing control loop of double-bus voltage transformer Download PDFInfo
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- CN117639247A CN117639247A CN202311614063.1A CN202311614063A CN117639247A CN 117639247 A CN117639247 A CN 117639247A CN 202311614063 A CN202311614063 A CN 202311614063A CN 117639247 A CN117639247 A CN 117639247A
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Abstract
The PT disconnecting link switching-on/off control loop of the double-bus voltage transformer provided by the embodiment of the invention is applied to a PT disconnecting link switching-on/off control system of the double-bus voltage transformer; the control loop comprises a positive electrode end, a plurality of working condition confirmation channels, a disconnecting link mechanism box opening and closing module and a negative electrode end; the working condition confirmation passage is used for determining whether the double bus is in a preset working condition and is conducted under the preset working condition; according to the technical scheme, when the PT disconnecting link meets the disconnecting link or switching-on condition, the working condition confirmation passage is conducted, and then the disconnecting link mechanism box switching-on/off module can be electrified, so that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled, and the problem that accidents occur when the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled due to misoperation of operators when the preset condition is not met due to the fact that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled by manpower is solved, the safety of switching-on/off operation is improved, and risks are reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of voltage transformers, in particular to a PT disconnecting link switching-on and switching-off control loop of a double-bus voltage transformer.
Background
The voltage transformer is used as one of important equipment in the power system, and has the function of converting the primary side alternating current high voltage of the power system into the secondary side low voltage which can be used by instruments and meters and a protection control device according to the rated proportion. Among them, the voltage transformer connected to the bus through the disconnecting link is called a bus voltage transformer.
In actual operation, when the bus voltage transformer fails or the bus is required to be overhauled in a power failure, the bus voltage transformer is required to be stopped, and the PT disconnecting link of the bus voltage transformer is pulled open. Before switching-on and switching-off operation is carried out on the PT disconnecting link of the bus voltage transformer, determining that the PT disconnecting link of the bus voltage transformer meets the switching condition; the prior art is often manually determined, and when an operator is neglected, accidents are easy to cause and dangers occur.
Disclosure of Invention
The invention provides a double-bus voltage transformer PT disconnecting link switching control loop, when a bus voltage transformer PT disconnecting link meets the switching condition, a disconnecting link mechanism box switching module is powered on to control PT disconnecting link switching or switching on, so that the safety of PT disconnecting link switching operation is improved, and the risk is reduced.
In a first aspect, an embodiment of the present invention provides a switching control loop of a PT disconnecting link of a dual-bus voltage transformer, which is applied to a switching control system of the PT disconnecting link of the dual-bus voltage transformer, wherein the dual-bus includes a first bus and a second bus, the first bus is connected with a bus voltage transformer, and the PT disconnecting link is connected between the bus voltage transformer and the first bus; a PT grounding knife of the bus voltage transformer is connected between the bus voltage transformer and the grounding end; the control loop comprises a positive electrode end, a plurality of working condition confirmation paths, a disconnecting link mechanism box opening and closing module and a negative electrode end; the working condition confirmation passage is used for determining whether the double bus is in a preset working condition or not and is conducted under the preset working condition; when any working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open or close.
Optionally, a busbar grounding knife is connected between the first busbar and the grounding end; the preset working conditions comprise a near control normal closing working condition; the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far-near working condition switching handle, a five-prevention lock, a near-control closing button and an emergency stop button; the working condition confirmation path comprises a near control normal closing working condition confirmation path;
the close-control normal closing working condition confirmation passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a five-prevention lock, a normally-open contact of a close-control closing button, a normally-closed contact of a bus ground knife, a disconnecting link mechanism box opening and closing module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the close control normal closing working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to be closed.
Optionally, the preset working conditions include a close control unlocking and closing working condition; the switch cabinet comprises a locking switching handle; the working condition confirmation path comprises a near control unlocking and closing working condition confirmation path;
the close control unlocking and closing working condition confirmation passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a five-prevention lock, a normally-open contact of a close control closing button, a normally-open contact of a locking switching handle, a disconnecting link mechanism box opening and closing module, a normally-closed contact of a sudden stop button and a second normally-open contact of the air switch;
and when the close control unlocking and switching-on working condition confirms that the passage is conducted, the disconnecting link mechanism box switching-on and switching-off module is electrified to control the PT disconnecting link to switch on.
Optionally, the preset working condition comprises a near control normal brake-separating working condition; a bus-bar switch is connected between the first bus and the second bus; the working condition confirmation path comprises a near control normal opening working condition confirmation path;
the close control normal opening working condition confirmation passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a far-near working condition switching handle normally-closed contact, a five-prevention lock normally-open contact, a close control opening button normally-open contact, a bus linkage switch normally-open contact, a bus linkage first disconnecting link normally-open contact, a bus linkage second disconnecting link normally-open contact, a disconnecting link mechanism box opening and closing module, an emergency stop button normally-closed contact and an air switch normally-open contact;
when the close control normal opening working condition confirms that the passage is conducted, the switch mechanism box opening and closing module is electrified to control the PT switch to open.
Optionally, the preset working conditions comprise a near control unlocking and opening working condition; the working condition confirmation path comprises a near control unlocking and opening working condition confirmation path;
the close control unlocking and switching-off working condition confirmation passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a far and near working condition switching handle normally-closed contact, a five-prevention normally-open contact, a close control switching-off button normally-open contact, a locking switching handle normally-open contact, a disconnecting link mechanism box switching-off module, a scram button normally-closed contact and an air switch normally-open contact;
and when the close control unlocking and opening working condition confirms that the passage is conducted, the switch mechanism box opening and closing module is electrified to control the PT switch to open.
Optionally, the double-bus voltage transformer PT disconnecting link opening and closing control system comprises a measurement and control device; the preset working conditions comprise remote control normal closing working conditions; the working condition confirmation path comprises a remote control normal closing working condition path; the measurement and control device comprises a remote control closing relay; the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far and near working condition switching handle and an emergency stop button;
the remote control normal switching-on working condition passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a remote and near working condition switching handle normally-closed contact, a remote control switching-on relay normally-open contact, a ground knife normally-closed contact, a disconnecting link mechanism box switching-on and switching-off module, a scram button normally-closed contact and an air switch normally-open contact;
when the remote control normal closing working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to be closed.
Optionally, the preset working conditions include a remote control unlocking and closing working condition; the working condition confirmation passage comprises a remote control unlocking and closing working condition passage; the switch cabinet further comprises a locking switching handle;
the remote control unlocking and switching-on working condition passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a normally-closed contact of a remote and near working condition switching handle, a normally-open contact of a remote control switching-on relay, a normally-open contact of a locking switching handle, a disconnecting link mechanism box switching-on and switching-off module, a scram button normally-closed contact and an air switch normally-open contact;
when the remote control unlocking and switching-on working condition passage is conducted, the disconnecting link mechanism box switching-on and switching-off module is electrified to control the PT disconnecting link to switch on.
Optionally, the preset working condition comprises a remote control normal brake-separating working condition; the working condition confirmation path comprises a remote control normal opening working condition path; the measurement and control device comprises a remote control brake-separating relay;
the remote control normal switching-off working condition passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a remote and near working condition switching handle normally-closed contact, a remote control switching-off relay normally-open contact, a bus-connected switch normally-open contact, a bus-connected first disconnecting link normally-open contact, a bus-connected second disconnecting link normally-open contact, a disconnecting link mechanism box switching-off module, a scram button normally-closed contact and an air switch normally-open contact;
when the remote control normal opening working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open.
Optionally, the preset working conditions comprise a remote control unlocking and opening working condition; the working condition confirmation passage comprises a remote control unlocking and opening working condition passage;
the remote control unlocking and switching-off working condition passage comprises an air switch normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a remote and near working condition switching handle normally-closed contact, a remote control switching-off relay normally-open contact, a locking switching handle normally-open contact, a disconnecting link mechanism box switching-on and switching-off module, a scram button normally-closed contact and an air switch normally-open contact;
when the remote control unlocking and opening working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open.
Optionally, the working condition confirmation path comprises a near control normal closing working condition confirmation path, a near control unlocking closing working condition confirmation path, a near control normal opening working condition confirmation path, a near control unlocking opening working condition confirmation path, a far control normal closing working condition confirmation path, a far control unlocking closing working condition confirmation path, a far control normal opening working condition confirmation path and a far control unlocking opening working condition confirmation path; the disconnecting link mechanism box opening and closing module comprises an opening signal input end and a closing signal input end;
the disconnecting link mechanism box opening and closing module is powered on from the closing signal input end in the near-control normal closing working condition confirmation path, the near-control unlocking and closing working condition confirmation path, the remote-control normal closing working condition confirmation path and the remote-control unlocking and closing working condition confirmation path so as to control the PT disconnecting link to be closed; in the near control normal opening working condition confirmation passage, the near control unlocking opening working condition confirmation passage, the remote control normal opening working condition confirmation passage and the remote control unlocking opening working condition confirmation passage, the disconnecting link mechanism box opening and closing module obtains electricity from the opening signal input end so as to control the PT disconnecting link to open.
The invention provides a double-bus voltage transformer PT disconnecting link switching-on/off control loop which is applied to a double-bus voltage transformer PT disconnecting link switching-on/off control system, wherein a double bus comprises a first bus and a second bus, the first bus is connected with a bus voltage transformer, and a PT disconnecting link is connected between the bus voltage transformer and the first bus; a PT grounding knife of the bus voltage transformer is connected between the bus voltage transformer and the grounding end; the control loop comprises a positive electrode end, a plurality of working condition confirmation channels, a disconnecting link mechanism box opening and closing module and a negative electrode end; the working condition confirmation passage is used for determining whether the double bus is in a preset working condition and is conducted under the preset working condition; when the conduction of a passage is confirmed under any working condition, the disconnecting link mechanism box opening and closing module is electrified so as to control the PT disconnecting link to open or close; according to the technical scheme, when the PT disconnecting link meets the disconnecting link or switching-on condition, the working condition confirmation passage is conducted, and then the disconnecting link mechanism box switching-on/off module can be electrified, so that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled, and the problem that accidents occur when the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled due to misoperation of operators when the preset condition is not met due to the fact that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled by manpower is solved, the safety of switching-on/off operation is improved, and risks are reduced.
Drawings
Fig. 1 is a schematic connection diagram of a dual-bus wiring voltage transformer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a switching control loop of a PT disconnecting link of a dual-bus wiring voltage transformer 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 dual-bus wiring voltage transformer provided by an embodiment of the present invention, and fig. 2 is a schematic connection diagram of a dual-bus wiring voltage transformer PT knife switch on/off control loop provided by an embodiment of the present invention, where the control loop is applied to a dual-bus voltage transformer PT knife switch on/off control system, the dual-bus includes a first bus 1M and a second bus 2M, the first bus 1M is connected with a bus voltage transformer PT, and a PT knife switch PTG is connected between the bus voltage transformer and the first bus; a bus voltage transformer PT grounding knife PT0 is connected between the bus voltage transformer and the grounding end; the control loop comprises a positive electrode end A, a plurality of working condition confirmation paths, a disconnecting link mechanism box opening and closing module 100 and a negative electrode end N; the working condition confirmation passage is used for determining whether the double bus is in a preset working condition and is conducted under the preset working condition; when any working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module 100 is electrified to control the PT disconnecting link PTG to open or close.
Specifically, referring to fig. 1, when a bus voltage transformer PT fails or a bus needs to be overhauled in a power failure, the bus voltage transformer PT needs to be shut down, namely, a disconnecting link PTG of the bus voltage transformer PT is pulled, and before the disconnecting link PTG is pulled, a disconnecting link pulling condition needs to be determined to be met, namely, a double bus needs to meet corresponding working conditions; likewise, before the PTG switching-on operation of the disconnecting link, it should be determined that the double bus needs to meet the corresponding working condition; only when the double buses need to meet corresponding working conditions, the working condition confirmation passage is conducted, and at the moment, the disconnecting link mechanism box opening and closing module 100 is electrified, so that the PT disconnecting link PTG opening or closing can be controlled.
The invention provides a double-bus voltage transformer PT disconnecting link switching-on/off control loop which is applied to a double-bus voltage transformer PT disconnecting link switching-on/off control system, wherein a double bus comprises a first bus and a second bus, the first bus is connected with a bus voltage transformer, and a PT disconnecting link is connected between the bus voltage transformer and the first bus; a PT grounding knife of the bus voltage transformer is connected between the bus voltage transformer and the grounding end; the control loop comprises a positive electrode end, a plurality of working condition confirmation channels, a disconnecting link mechanism box opening and closing module and a negative electrode end; the working condition confirmation passage is used for determining whether the double bus is in a preset working condition and is conducted under the preset working condition; when the conduction of a passage is confirmed under any working condition, the disconnecting link mechanism box opening and closing module is electrified so as to control the PT disconnecting link to open or close; according to the technical scheme, when the PT disconnecting link meets the disconnecting link or switching-on condition, the working condition confirmation passage is conducted, and then the disconnecting link mechanism box switching-on/off module can be electrified, so that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled, and the problem that accidents occur when the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled due to misoperation of operators when the preset condition is not met due to the fact that the switching-on/off of the PT disconnecting link of the bus voltage transformer is controlled by manpower is solved, the safety of switching-on/off operation is improved, and risks are reduced.
Optionally, a busbar ground knife J00 is connected between the first busbar 1M and the ground terminal; the preset working conditions comprise a near control normal closing working condition; the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far-near working condition switching handle, a five-prevention lock, a near-control closing button and an emergency stop button; the working condition confirmation path comprises a near control normal closing working condition confirmation path; the close control normal closing working condition confirmation path comprises an air switch first normally-open contact MCB 1-2, a bus voltage transformer PT ground knife normally-closed contact PT01-2, a far and near working condition switching handle normally-closed contact QK11-2, a five-prevention lock normally-open contact WF 3-4, a close control closing button normally-open contact HA 3-4, a bus ground knife normally-closed contact J001-2, a disconnecting link mechanism box opening and closing module 100, an emergency stop button normally-closed contact TA 1-2 and an air switch second normally-open contact MCB 3-4;
when the close control normal closing working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module 100 is electrified to control PT disconnecting link closing.
Specifically, when the switch PTG needs to be closed on the spot by the PT terminal box during normal operation closing, it needs to be determined that the air switch is at the closing position, the bus voltage transformer PT ground knife PT0 is at the opening position, the far and near working condition switching handle is switched to the near control position, the five-prevention program lock meets the conditions, the bus ground knife J00 is at the opening position, and under the condition that the emergency stop button is not pressed, at this time, the user presses the near control closing button, the normally open contact HA 3-4 of the near control closing button is closed, the air switch first normally open contact MCB 1-2 is closed, the bus voltage transformer PT ground knife normally closed contact PT01-2 is closed, the normally closed contact QK11-2 of the far and near working condition switching handle is closed, the normally open contact WF 3-4 of the five-prevention lock is closed, the bus ground knife normally closed contact J001-2 is closed, the emergency stop button contact TA 1-2 is closed, and the air switch second normally open contact MCB 3-4 is closed, at this time, in an alternative embodiment of the invention, the switch mechanism box opening module 100 comprises a driving motor, and the switch 100 is driven to open the switch module 100.
Optionally, the preset working conditions comprise a close control unlocking and closing working condition; the switch cabinet comprises a locking switching handle; the working condition confirmation path comprises a near control unlocking and closing working condition confirmation path; the close control unlocking and closing working condition confirmation path comprises an air switch first normally-open contact MCB 1-2, a bus voltage transformer PT ground knife normally-closed contact PT01-2, a far and near working condition switching handle normally-closed contact QK11-2, a five-prevention lock normally-open contact WF 3-4, a close control closing button normally-open contact HA 3-4, a locking switching handle normally-open contact QK21-2, a disconnecting link mechanism box opening and closing module 100, an emergency stop button normally-closed contact TA 1-2 and an air switch second normally-open contact MCB 3-4;
when the close control unlocking and closing working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to be closed.
Specifically, when the close-control unlocking and closing needs to be performed on the terminal box, the locking switching handle needs to be switched to the unlocking position, at this time, the air switch needs to be determined to be in the closing position, the bus voltage transformer PT ground knife PT0 is switched to the close-control position in the opening position, the five-prevention program lock meets the conditions, and the emergency stop button is not pressed, at this time, the user presses the close-control closing button, the normally open contact HA 3-4 of the close-control closing button is closed, the air switch first normally open contact MCB 1-2 is closed, the bus voltage transformer PT ground knife normally closed contact PT01-2 is closed, the bus voltage transformer PT ground knife normally closed contact QK11-2 of the far-near working condition switching handle is closed, the five-prevention normally open contact WF 3-4 of the locking switching handle is closed, the normally closed contact QK21-2 of the emergency stop button is closed, the air switch second normally open contact MCB 3-4 is closed, and at this time the knife switch mechanism box opening and closing module 100 is powered, in an alternative embodiment of the invention, the knife mechanism box opening and closing module 100 comprises a motor, and the knife switch is driven after powered PTG.
Optionally, the preset working condition comprises a close control normal brake-separating working condition; a bus-bar switch DL is connected between the first bus 1M and the second bus 2M; the working condition confirmation path comprises a near control normal opening working condition confirmation path; the close control normal switching-off working condition confirmation path comprises an air switch normally-open contact MCB 1-2, a bus voltage transformer PT ground knife normally-closed contact PT01-2, a far and near working condition switching handle normally-closed contact QK11-2, a five-prevention lock normally-open contact WF 3-4, a close control switching-off button normally-open contact FA3-4, a bus switching normally-open contact DL 3-4, a bus first disconnecting link normally-open contact 1G 3-4, a bus second disconnecting link normally-open contact 2G 3-4, a disconnecting link mechanism box switching-on module 100, an emergency stop button normally-closed contact TA 1-2 and an air switch normally-open contact MCB 3-4;
when the close control normal opening working condition confirms that the passage is conducted, the opening and closing module of the disconnecting link mechanism box is electrified to control the PT disconnecting link to open.
Specifically, when the disconnecting switch PTG needs to be pulled on the site of the PT terminal box in normal operation, the air switch is required to be confirmed to be at a closing position, the bus voltage transformer PT is required to be pulled on the site, the far and near working condition switching handle is required to be switched to be close to control, the five-prevention program lock meets the conditions, the locking switching handle QK2 is at an interlocking position, the bus switch DL is at a closing position, the bus first disconnecting switch 1G is at a closing position, the bus second disconnecting switch 2G is at a closing position, the emergency stop button TA is not pressed, namely, the air switch first normally open contact MCB 1-2, the bus voltage transformer PT is required to be closed by the normally closed contact PT01-2, the normally closed contact QK11-2 of the far and near working condition switching handle, the normally open contact WF 3-4 of the five-prevention lock, the normally open contact FA3-4 of the close control disconnecting switch button, the bus switch normally open contact DL 3-4, the bus first disconnecting switch normally open contact 1G-4, the bus second disconnecting switch normally open contact 2G 3-4, the emergency stop button TA 1-2, and the air switch second normally open contact 4 are required to be closed by the switching mechanism PT 100.
Optionally, the preset working condition comprises a near control unlocking and opening working condition; the working condition confirmation path comprises a near control unlocking and opening working condition confirmation path; the close control unlocking and switching-off working condition confirmation path comprises a first normally open contact MCB 1-2 of an air switch, a normally closed contact PT01-2 of a ground knife of a bus voltage transformer PT, a normally closed contact QK11-2 of a far and near working condition switching handle, a normally open contact WF 3-4 of a five-prevention lock, a normally open contact FA3-4 of a close control switching-off button, a normally open contact QK23-4 of a locking switching handle, a disconnecting link mechanism box switching-off module 100, a normally closed contact TA 1-2 of an emergency stop button and a second normally open contact MCB 3-4 of the air switch; when the close control unlocking and opening working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control PT disconnecting link opening.
Specifically, when the close-control unlocking and opening of the terminal box is required to be performed on site, the locking switching handle is required to be switched to the unlocking position, at the moment, the condition that an air switch is in a closing position, a ground knife PT0 of a bus voltage transformer PT is in a pulling position, a far-near working condition switching handle is switched to a close-control position, a five-prevention program lock meets the condition, the locking switching handle is switched to the unlocking position, and an emergency stop button is not pressed is required to be determined, namely, a first normally open contact MCB 1-2 of the air switch, a normally closed contact PT01-2 of the ground knife of the bus voltage transformer PT, a normally closed contact QK11-2 of the far-near working condition switching handle, a normally open contact WF 3-4 of the five-prevention lock, a normally open contact FA3-4 of the close-control opening button, a normally open contact QK23-4 of the locking switching handle, a switch mechanism box opening module 100, a normally closed contact TA 1-2 of the emergency stop button and a second normally open contact MCB 3-4 of the air switch are all in a closed state; at this time, the disconnecting link mechanism box opening and closing module 100 is powered on to control the PT disconnecting link PTG opening and closing.
Optionally, the control system for switching on and off the PT disconnecting link of the double-bus voltage transformer comprises a measurement and control device (not shown in the figure); the preset working conditions comprise remote control normal closing working conditions; the working condition confirmation path comprises a remote control normal closing working condition path; the measurement and control device comprises a remote control closing relay (not shown in the figure); the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far-near working condition switching handle and an emergency stop button; the remote control normal switching-on working condition passage comprises a first normally-open contact MCB 1-2 of an air switch, a normally-closed contact PT01-2 of a ground knife of a bus voltage transformer PT, a normally-closed contact QK11-2 of a far-near working condition switching handle, a normally-open contact YH 3-4 of a remote control switching-on relay, a normally-closed contact J001-2 of the ground knife, a switch mechanism box switching-on/off module 100, a normally-closed contact TA 1-2 of a scram button and a second normally-open contact MCB 3-4 of the air switch; when the remote control normal switching-on working condition passage is conducted, the disconnecting link mechanism box switching-on/off module is electrified to control the PT disconnecting link to be switched on.
Specifically, when the PT knife switch needs to be closed on the measurement and control device, the air switch MCB is required to be confirmed to be in a closing position, the bus voltage transformer PT ground knife PT0 is required to be switched to be in a remote control position, the remote control working condition switching handle is required to be switched to be in an interlocking position, the bus ground knife J00 is required to be in a pulling position, the emergency stop button is not pressed down, the measurement and control device receives a closing command, namely the air switch first normally open contact MCB 1-2, the bus voltage transformer PT ground knife normally closed contact PT01-2, the normally closed contact QK11-2 of the remote control working condition switching handle, the normally open contact YH 3-4 of the remote control closing relay, the ground knife normally closed contact J001-2, the emergency stop button normally closed contact TA 1-2 and the air switch second normally open contact MCB 3-4 are all closed, and at the moment, the knife switch mechanism box opening and closing module 100 is electrified, and the PT knife switch PTG is controlled.
Optionally, the preset working conditions include a remote control unlocking and closing working condition; the working condition confirmation passage comprises a remote control unlocking and closing working condition passage; the switch cabinet also comprises a locking switching handle; the remote control unlocking and switching-on working condition passage comprises a first normally-open contact MCB 1-2 of an air switch, a normally-closed contact PT01-2 of a ground knife of a bus voltage transformer PT, a normally-closed contact QK11-2 of a remote and near working condition switching handle, a normally-open contact YH 3-4 of a remote control switching-on relay, a normally-open contact QK21-2 of a locking switching handle, a disconnecting link mechanism box switching-on module 100, a normally-closed contact TA 1-2 of a scram button and a second normally-open contact MCB 3-4 of the air switch; when the remote control unlocking and switching-on working condition passage is conducted, the disconnecting link mechanism box switching-on and switching-off module is electrified to control the PT disconnecting link to be switched on.
Specifically, when the measurement and control device is required to be unlocked and operated to switch on, the locking switching handle needs to be determined to be switched to the unlocking position, the air switch MCB is in the switching-on position, the bus voltage transformer PT ground knife PT0 is in the pulling-off position, the far and near working condition switching handle is switched to the far control, and the emergency stop button is not pressed, namely, the air switch first normally-open contact MCB 1-2, the bus voltage transformer PT ground knife normally-closed contact PT01-2, the normally-closed contact QK11-2 of the far and near working condition switching handle, the normally-open contact YH 3-4 of the far control switching relay, the normally-open contact QK21-2 of the locking switching handle, the emergency stop button normally-closed contact TA 1-2 and the air switch second normally-open contact MCB 3-4 are all closed, and at the moment, the knife switch mechanism box switching-on module 100 is powered on to control the PT knife switch PTG to switch on.
Optionally, the preset working condition comprises a remote control normal brake-separating working condition; the working condition confirmation path comprises a remote control normal opening working condition path; the measurement and control device comprises a remote control brake-separating relay; the remote control normal switching-off working condition passage comprises an air switch first normally-open contact MCB 1-2, a bus voltage transformer PT ground knife normally-closed contact PT01-2, a normally-closed contact QK11-2 of a remote control switching-off relay, a normally-open contact YF 3-4 of a remote control switching-off relay, a master-linkage switch normally-open contact DL 3-4, a master-linkage first switch normally-open contact 1G 3-4, a master-linkage second switch normally-open contact 2G 3-4, a switch mechanism box switching-off module 100, an emergency stop button normally-closed contact TA 1-2 and an air switch second normally-open contact MCB 3-4; when the passage of the remote control normal opening working condition is conducted, the opening and closing module of the disconnecting link mechanism box is electrified to control the PT disconnecting link to open.
Specifically, when the measurement and control device is required to pull the PT knife switch open, it is required to confirm that the air switch is at the switch-on position, the bus voltage transformer PT ground knife PT0 is at the pull-off position, the remote-control and near-control working condition switching handle is switched to the remote control, the locking switching handle is at the interlocking position, the bus connection switch is at the switch-on position, the bus connection first knife switch 1G is at the switch-on position, the bus connection second knife switch 2G is at the switch-on position, the emergency stop button is not pressed, namely, the air switch first normally-open contact MCB 1-2, the bus voltage transformer PT ground knife normally-closed contact PT01-2, the normally-closed contact QK11-2 of the remote-control working condition switching handle, the normally-open contact YF 3-4 of the remote-control switch-off relay, the bus connection switch normally-open contact DL 3-4, the bus connection first knife normally-open contact 1G 3-4, the bus connection second knife switch normally-open contact 2G 3-4, the emergency stop button normally-closed contact TA 1-2, and the air switch second normally-open contact MCB 3-4 are all closed, and the knife switch mechanism box switch-off module 100 is powered, and the knife switch PTG is controlled to switch off.
Optionally, the preset working condition comprises a remote control unlocking and opening working condition; the working condition confirmation path comprises a remote control unlocking and opening working condition path; the remote control unlocking and switching-off working condition passage comprises a first normally-open contact MCB 1-2 of an air switch, a normally-closed contact PT01-2 of a ground knife of a bus voltage transformer PT, a normally-closed contact QK11-2 of a remote and near working condition switching handle, a normally-open contact YF 3-4 of a remote control switching-off relay, a normally-open contact QK21-2 of a locking switching handle, a switch mechanism box switching-on module 100, a normally-closed contact TA 1-2 of a scram button and a second normally-open contact MCB 3-4 of the air switch; when the remote control unlocking and opening working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control PT disconnecting link opening and closing.
Specifically, when the measurement and control device is required to unlock and operate the disconnecting link, the locking switching handle is required to be determined to be switched to the unlocking position, the air switch is required to be switched to the switching-on position, the bus voltage transformer PT ground knife PT0 is required to be switched to the remote control position under the remote working condition, the locking switching handle is in the interlocking position, the emergency stop button is not pressed, namely, the air switch first normally-open contact MCB 1-2, the bus voltage transformer PT ground knife normally-closed contact PT01-2, the normally-closed contact QK11-2 of the remote control switching handle, the normally-open contact YF 3-4 of the remote control disconnecting link relay, the normally-open contact QK21-2 of the locking switching handle, the emergency stop button normally-closed contact TA 1-2 and the air switch second normally-open contact MCB 3-4 are all closed, and the disconnecting link mechanism box switching module 100 is powered to control the PT knife PTG switching.
Optionally, the working condition confirmation path comprises a near-control normal closing working condition confirmation path, a near-control unlocking closing working condition confirmation path, a near-control normal opening working condition confirmation path, a near-control unlocking opening working condition confirmation path, a far-control normal closing working condition confirmation path, a far-control unlocking closing working condition confirmation path, a far-control normal opening working condition confirmation path and a far-control unlocking opening working condition confirmation path; the disconnecting link mechanism box opening and closing module 100 comprises an opening signal input end X1 and a closing signal input end X2; the disconnecting link mechanism box opening and closing module 100 obtains electricity from a closing signal input end X2 in a near control normal closing working condition confirmation path, a near control unlocking closing working condition confirmation path, a far control normal closing working condition confirmation path and a far control unlocking closing working condition confirmation path so as to control PT disconnecting link to close; in the near control normal opening working condition confirmation path, the near control unlocking opening working condition confirmation path, the far control normal opening working condition confirmation path and the far control unlocking opening working condition confirmation path, the disconnecting link mechanism box opening and closing module 100 obtains electricity from the opening signal input end X1 so as to control PT disconnecting link opening.
Specifically, referring to fig. 2, the switch mechanism box opening and closing module 100 includes an opening signal input end X1 and a closing signal input end X2, and in an alternative embodiment of the present invention, the switch mechanism box opening and closing module 100 includes a motor, an opening control circuit and a closing control circuit, the opening signal input end X1 is an input end of the opening control circuit, and the closing signal input end X2 is an input end of the closing control circuit; when the working condition is the switching-off working condition, the switching-off control circuit is conducted after being electrified through a switching-off signal input end X1, so that a PT disconnecting link PTG switching-off is controlled to be driven by a motor; and when the current working condition is the switching-on working condition, the switching-on control circuit is conducted after being electrified through the switching-on signal input end X2, so that the PT disconnecting link PTG is controlled to be driven by the motor to be switched on.
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 (10)
1. The double-bus voltage transformer PT disconnecting link opening and closing control loop is characterized by being applied to a double-bus voltage transformer PT disconnecting link opening and closing control system, wherein the double buses comprise a first bus and a second bus, the first bus is connected with a bus voltage transformer, and the PT disconnecting link is connected between the bus voltage transformer and the first bus; a PT grounding knife of the bus voltage transformer is connected between the bus voltage transformer and the grounding end;
the control loop comprises a positive electrode end, a plurality of working condition confirmation paths, a disconnecting link mechanism box opening and closing module and a negative electrode end;
the working condition confirmation passage is used for determining whether the double bus is in a preset working condition or not and is conducted under the preset working condition;
when any working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open or close.
2. The control loop of claim 1, wherein a busbar ground blade is connected between the first busbar and the ground;
the preset working conditions comprise a near control normal closing working condition; the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far-near working condition switching handle, a five-prevention lock, a near-control closing button and an emergency stop button; the working condition confirmation path comprises a near control normal closing working condition confirmation path;
the close-control normal closing working condition confirmation passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a five-prevention lock, a normally-open contact of a close-control closing button, a normally-closed contact of a bus ground knife, a disconnecting link mechanism box opening and closing module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the close control normal closing working condition confirms that the passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to be closed.
3. The control loop of claim 2, wherein the preset operating conditions include a near-control unlock closing operating condition; the switch cabinet comprises a locking switching handle; the working condition confirmation path comprises a near control unlocking and closing working condition confirmation path;
the close control unlocking and closing working condition confirmation passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a five-prevention lock, a normally-open contact of a close control closing button, a normally-open contact of a locking switching handle, a disconnecting link mechanism box opening and closing module, a normally-closed contact of a sudden stop button and a second normally-open contact of the air switch;
and when the close control unlocking and switching-on working condition confirms that the passage is conducted, the disconnecting link mechanism box switching-on and switching-off module is electrified to control the PT disconnecting link to switch on.
4. The control loop of claim 2, wherein the preset operating conditions include a near-control normal opening operating condition; a bus-bar switch is connected between the first bus and the second bus; the working condition confirmation path comprises a near control normal opening working condition confirmation path;
the close control normal opening working condition confirmation path comprises an air switch first normally-open contact, a bus voltage transformer PT ground knife normally-closed contact, a far-near working condition switching handle normally-closed contact, a five-prevention lock normally-open contact, a close control opening button normally-open contact, a bus-connected switch normally-open contact, a bus-connected first disconnecting link normally-open contact, a bus-connected second disconnecting link normally-open contact, a disconnecting link mechanism box opening and closing module, an emergency stop button normally-closed contact and an air switch second normally-open contact;
when the close control normal opening working condition confirms that the passage is conducted, the switch mechanism box opening and closing module is electrified to control the PT switch to open.
5. The control loop of claim 3, wherein the preset operating conditions include a near-control unlock-brake operating condition; the working condition confirmation path comprises a near control unlocking and opening working condition confirmation path;
the close control unlocking and switching-off working condition confirmation passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a five-prevention lock, a normally-open contact of a close control switching-off button, a normally-open contact of a locking switching handle, a switching-off module of a knife switch mechanism box, a normally-closed contact of a sudden stop button and a second normally-open contact of the air switch;
and when the close control unlocking and opening working condition confirms that the passage is conducted, the switch mechanism box opening and closing module is electrified to control the PT switch to open.
6. The control loop according to claim 1, wherein the double bus voltage transformer PT knife switch opening and closing control system comprises a measurement and control device; the preset working conditions comprise remote control normal closing working conditions; the working condition confirmation path comprises a remote control normal closing working condition path; the measurement and control device comprises a remote control closing relay; the control loop is arranged in a switch cabinet, and the switch cabinet comprises an air switch, a far and near working condition switching handle and an emergency stop button;
the remote control normal switching-on working condition passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far and near working condition switching handle, a normally-open contact of a remote control switching-on relay, a normally-closed contact of the ground knife, a switch mechanism box switching-on and switching-off module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the remote control normal closing working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to be closed.
7. The control circuit of claim 6, wherein the preset operating condition comprises a remote unlock closing condition; the working condition confirmation passage comprises a remote control unlocking and closing working condition passage; the switch cabinet further comprises a locking switching handle;
the remote control unlocking and switching-on working condition passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far and near working condition switching handle, a normally-open contact of a remote control switching-on relay, a normally-open contact of a locking switching handle, a disconnecting link mechanism box switching-on and switching-off module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the remote control unlocking and switching-on working condition passage is conducted, the disconnecting link mechanism box switching-on and switching-off module is electrified to control the PT disconnecting link to switch on.
8. The control loop of claim 6, wherein the preset operating condition comprises a remote normal opening operating condition; the working condition confirmation path comprises a remote control normal opening working condition path; the measurement and control device comprises a remote control brake-separating relay;
the remote control normal switching-off working condition passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a far-near working condition switching handle, a normally-open contact of a remote control switching-off relay, a normally-open contact of a bus-tie switch, a normally-open contact of a bus-tie first disconnecting link, a normally-open contact of a bus-tie second disconnecting link, a disconnecting link mechanism box switching-off module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the remote control normal opening working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open.
9. The control loop of claim 8, wherein the preset operating conditions include a remote unlock split operating condition; the working condition confirmation passage comprises a remote control unlocking and opening working condition passage;
the remote control unlocking and switching-off working condition passage comprises a first normally-open contact of an air switch, a normally-closed contact of a PT ground knife of a bus voltage transformer, a normally-closed contact of a remote and near working condition switching handle, a normally-open contact of a remote control switching-off relay, a normally-open contact of a locking switching handle, a switch mechanism box switching-on and switching-off module, a normally-closed contact of a scram button and a second normally-open contact of the air switch;
when the remote control unlocking and opening working condition passage is conducted, the disconnecting link mechanism box opening and closing module is electrified to control the PT disconnecting link to open.
10. The control circuit of claim 1, wherein the condition confirmation pathway comprises a near normal closing condition confirmation pathway, a near unlocking closing condition confirmation pathway, a near normal opening condition confirmation pathway, a near unlocking opening condition confirmation pathway, a far normal closing condition confirmation pathway, a far unlocking closing condition confirmation pathway, a far normal opening condition confirmation pathway, a far unlocking opening condition confirmation pathway; the disconnecting link mechanism box opening and closing module comprises an opening signal input end and a closing signal input end;
the disconnecting link mechanism box opening and closing module is powered on from the closing signal input end in the near-control normal closing working condition confirmation path, the near-control unlocking and closing working condition confirmation path, the remote-control normal closing working condition confirmation path and the remote-control unlocking and closing working condition confirmation path so as to control the PT disconnecting link to be closed; in the near control normal opening working condition confirmation passage, the near control unlocking opening working condition confirmation passage, the remote control normal opening working condition confirmation passage and the remote control unlocking opening working condition confirmation passage, the disconnecting link mechanism box opening and closing module obtains electricity from the opening signal input end so as to control the PT disconnecting link to open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311614063.1A CN117639247A (en) | 2023-11-29 | 2023-11-29 | PT disconnecting link opening and closing control loop of double-bus voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311614063.1A CN117639247A (en) | 2023-11-29 | 2023-11-29 | PT disconnecting link opening and closing control loop of double-bus voltage transformer |
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| Publication Number | Publication Date |
|---|---|
| CN117639247A true CN117639247A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311614063.1A Pending CN117639247A (en) | 2023-11-29 | 2023-11-29 | PT disconnecting link opening and closing control loop of double-bus voltage transformer |
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| Country | Link |
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| CN (1) | CN117639247A (en) |
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2023
- 2023-11-29 CN CN202311614063.1A patent/CN117639247A/en active Pending
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