CN117995600B - Switching method of double-incoming-line vacuum circuit breaker isolation equipment and vacuum isolation equipment - Google Patents
Switching method of double-incoming-line vacuum circuit breaker isolation equipment and vacuum isolation equipment Download PDFInfo
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Abstract
The invention discloses a switching method of double-incoming-line vacuum circuit breaker isolation equipment and vacuum isolation equipment, wherein the switching method of the double-incoming-line vacuum circuit breaker isolation equipment extracts corresponding characteristic signals by analyzing respective power grid signals of double power grids, judges the running states of the respective power grids according to the relation between the corresponding characteristic signals and preset characteristic threshold values, switches a first/second vacuum circuit breaker and an isolation switch according to the current power grid access condition and the running states of the double power grids, switches subsequent power utilization into the power grids with more stable running states, enables the whole important areas to realize uninterrupted power utilization, realizes stable power supply and distribution, reduces the configuration of corresponding power energy storage equipment at the lower level of the power utilization area, and greatly reduces the backup power utilization cost.
Description
Technical Field
The invention relates to the technical field of medium-high voltage circuit breakers, in particular to a switching method of double-incoming-line vacuum circuit breaker isolation equipment and the vacuum isolation equipment.
Background
The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinction are all vacuum, and the vacuum does not contain conductive medium, so that the arc is extinguished rapidly, and the vacuum circuit breaker has the advantages of small volume, light weight, suitability for frequent operation and no maintenance of arc extinction, and is more popular in power distribution networks.
In the context of rapid development of the power industry, high voltage vacuum circuit breakers are ideal choices in power systems. In the installation aspect, the high-voltage vacuum circuit breaker is usually installed on an outdoor column or floor type, and is suitable for occasions such as split load current, combined load current, overload current, short-circuit current, zero sequence current, overvoltage, undervoltage and the like.
The vacuum circuit breaker is usually installed between a power distribution network and a power consumption area as a first-stage switching-on/off device, the power distribution network is continuously developed along with the rapid increase of urban and rural construction scale and power consumption load and the requirement of power supply reliability, the structure of the power distribution network is more and more complex, and the dispatching and management of the power distribution network are not suitable for the requirements of urban and rural power supply, so that the time from the discovery and isolation of single faults to the recovery of normal power supply of non-fault areas generally needs several hours for most power distribution networks, and the normal production and necessary power consumption are seriously influenced. Especially for electricity utilization places such as important industrial areas, the demand on reliable electricity utilization is extremely high, the whole area is required to be uninterrupted and fault-free, the existing distribution equipment from the distribution network to the electricity utilization area cannot be uninterrupted and stable in power supply, corresponding electric power energy storage equipment is required to be configured at the lower level of the electricity utilization area to realize backup redundancy, and electricity distribution and utilization cost is greatly increased.
Disclosure of Invention
In order to solve the problems, the invention provides a switching method of isolation equipment of a double-incoming-line vacuum circuit breaker and the vacuum isolation equipment.
In a first aspect of the present invention, a switching method of isolation equipment of a double-incoming line vacuum circuit breaker is provided, comprising:
s100, respectively acquiring a first power grid signal of a power grid where a first vacuum circuit breaker is located and a second power grid signal of the power grid where a second vacuum circuit breaker is located;
s200, respectively carrying out feature extraction on the first power grid signal and the second power grid signal to obtain a first feature signal and a second feature signal;
S300, respectively judging a first running state of a power grid where the first vacuum circuit breaker is located and a second running state of the power grid where the second vacuum circuit breaker is located according to a preset characteristic threshold value, the first characteristic signal and the second characteristic signal;
S400, according to the first operation state and the second operation state, executing at least one of the following switching actions:
s410, keeping the currently-used vacuum circuit breaker in a closing state, keeping the isolating switch connected to the currently-used vacuum circuit breaker, and keeping the non-used vacuum circuit breaker in a separating state;
S420, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to the non-used vacuum circuit breaker, and switching on the non-used vacuum circuit breaker;
s430, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to an isolating state, and keeping the non-used vacuum circuit breaker in the switching-off state.
According to the switching method of the double-incoming-line vacuum circuit breaker isolation equipment, corresponding characteristic signals are extracted by analyzing respective power grid signals of the double power grids, the running states of the respective power grids are judged according to the corresponding characteristic signals and the relation of preset characteristic thresholds, the first/second vacuum circuit breaker and the isolation switch are switched according to the current power grid access condition and the running states of the double power grids, the subsequent power utilization is connected into the power grid with a more stable running state, the whole important area is uninterrupted, stable power supply and distribution are realized, the corresponding power energy storage equipment is configured at the lower level of the power utilization area is reduced, and the backup power distribution cost is greatly reduced.
In a second aspect of the present invention, there is provided a vacuum isolation apparatus comprising a first vacuum interrupter, a second vacuum interrupter, an isolation switch, and a controller; the first vacuum circuit breaker and the second vacuum circuit breaker are stacked, the first vacuum circuit breaker and the second vacuum circuit breaker comprise vacuum tubes, wire inlet ends and wire outlet ends connected to two ends of the vacuum tubes, a circuit breaker transmission mechanism in linkage fit with the vacuum tubes and a circuit breaker driving assembly for driving the circuit breaker transmission mechanism to act, and the wire inlet ends are connected with voltage transformers; the isolating switch comprises an isolating transmission mechanism, an isolating touch knife connected with the isolating transmission mechanism and an isolating driving assembly for driving the isolating transmission mechanism to act; the controller is respectively and electrically connected with the voltage transformer, the breaker driving assembly and the isolation driving assembly; the isolation contact knife rotates along with the isolation driving assembly to be electrically connected with the outlet end of the first vacuum circuit breaker, electrically connected with the outlet end of the second vacuum circuit breaker, in an isolation state and in a grounding state; the controller executes the switching method of the double-inlet-wire vacuum circuit breaker isolation equipment.
The vacuum isolation equipment is provided with the double-vacuum circuit breaker and the isolating switch, the isolating switch is provided with a four-station structure of first closing, second closing and isolating and grounding, and four modes of conducting the first vacuum circuit breaker-isolating switch, conducting the second vacuum circuit breaker-isolating switch, disconnecting the vacuum circuit breaker from the isolating switch and grounding the isolating switch are realized, so that an implementation basis is provided for a switching method of the double-inlet-wire vacuum circuit breaker isolating equipment.
Drawings
Fig. 1 is a flowchart of a switching method of an isolation device of a double-incoming line vacuum circuit breaker according to an embodiment of the present invention.
FIG. 2 is an exploded view of a vacuum isolation apparatus according to an embodiment of the present invention.
Fig. 3 is an internal schematic view of a first/second vacuum circuit breaker according to an embodiment of the present invention.
Fig. 4 is a schematic view of a circuit breaker transmission mechanism according to an embodiment of the invention.
Fig. 5 is a perspective view of an isolating switch according to an embodiment of the invention.
FIG. 6 is a side view of an isolated drive mechanism according to an embodiment of the present invention.
FIG. 7 is an electrical control diagram of a vacuum isolation apparatus according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
With reference to fig. 1, the technical scheme of the invention is a switching method of isolation equipment of a double-incoming-line vacuum circuit breaker, comprising the following steps:
s100, respectively acquiring a first power grid signal of a power grid where a first vacuum circuit breaker is located and a second power grid signal of the power grid where a second vacuum circuit breaker is located;
s200, respectively carrying out feature extraction on the first power grid signal and the second power grid signal to obtain a first feature signal and a second feature signal;
S300, respectively judging a first running state of a power grid where the first vacuum circuit breaker is located and a second running state of the power grid where the second vacuum circuit breaker is located according to a preset characteristic threshold value, the first characteristic signal and the second characteristic signal;
S400, according to the first operation state and the second operation state, executing at least one of the following switching actions:
s410, keeping the currently-used vacuum circuit breaker in a closing state, keeping the isolating switch connected to the currently-used vacuum circuit breaker, and keeping the non-used vacuum circuit breaker in a separating state;
S420, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to the non-used vacuum circuit breaker, and switching on the non-used vacuum circuit breaker;
s430, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to an isolating state, and keeping the non-used vacuum circuit breaker in the switching-off state.
In this embodiment, the wire inlet side of the first vacuum circuit breaker is connected to a first power grid, the wire inlet side of the second vacuum circuit breaker is connected to a second power grid, and the first vacuum circuit breaker and the second vacuum circuit breaker share a disconnecting switch.
When the first power grid supplies power to a target area, the first vacuum circuit breaker and the isolating switch are switched on, and the second vacuum circuit breaker is switched off; when the second power grid supplies power to a target area, the second vacuum circuit breaker and the isolating switch are switched on, and the first vacuum circuit breaker is switched off. The double-incoming-line vacuum circuit breaker isolation device is a basis for ensuring uninterrupted power utilization of the whole power utilization sheet area, and is described in detail in embodiment 2.
In this embodiment, the steps S410, S420, and S430 are not performed in parallel, i.e., one of the steps S410, S420, and S430 is performed when the two-wire vacuum circuit breaker isolation device is switched.
In this embodiment, S411, if the first operation state and the second operation state are both normal states, keep the currently-commissioned vacuum circuit breaker in a closed state, keep the disconnecting switch connected to the currently-commissioned vacuum circuit breaker, and keep the non-commissioned vacuum circuit breaker in a disconnected state;
S412, if the first running state and the second running state are respectively in a normal state and an abnormal state; if the power grid in the normal state is the power grid where the vacuum circuit breaker which is currently in use is located, keeping the vacuum circuit breaker which is currently in use in a closing state, keeping the isolating switch connected to the vacuum circuit breaker which is currently in use, and keeping the vacuum circuit breaker which is not in use in a separating state;
S421, if the first running state and the second running state are respectively in a normal state and an abnormal state; if the power grid in the abnormal state is the power grid where the current vacuum circuit breaker is located, opening the current vacuum circuit breaker, switching the isolating switch from the current vacuum circuit breaker to the non-vacuum circuit breaker, and closing the non-vacuum circuit breaker;
And S431, if the first running state and the second running state are abnormal states, opening the current vacuum circuit breaker, switching the isolating switch from the current vacuum circuit breaker to the isolating state, and keeping the non-used vacuum circuit breaker in the opening state.
When the first power grid and the second power grid are in a fault state, the first vacuum circuit breaker and the second vacuum circuit breaker are controlled to be evenly opened, and the isolating switch is set as an isolating station.
In this embodiment, S440, an equipment maintenance signal is acquired, and the isolating switch is switched from the isolating state to the grounding state;
if the current vacuum circuit breaker is available, switching off the current vacuum circuit breaker, and directly switching the isolating switch from the current vacuum circuit breaker to a grounding state;
And if the vacuum circuit breaker is not currently in use, directly switching the isolating switch from the isolating state to the grounding state.
In the above embodiment, the equipment maintenance signal is issued by the power grid power supply station, and step S440 is similarly parallel to step S410, step S420, and step S430.
In this embodiment, the first characteristic signal includes a first a-phase voltage characteristic signal U 1A, a first B-phase voltage characteristic signal U 1B, and a first C-phase voltage characteristic signal U 1C extracted from the first power grid signal, n first a-phase voltage characteristic signals U 1A, first B-phase voltage characteristic signals U 1B, and first C-phase voltage characteristic signals U 1C at the same time are selected, and a first positive sequence component U 1P, a first negative sequence component U 1N, and a first zero sequence component U 1Z of a first power grid are calculated;
The second characteristic signal includes a second a-phase voltage characteristic signal U 2A, a second B-phase voltage characteristic signal U 2B, and a second C-phase voltage characteristic signal U 2C extracted from the second power grid signal, n second a-phase voltage characteristic signals U 2A, second B-phase voltage characteristic signals U 2B, and second C-phase voltage characteristic signals U 2C at the same time are selected, and a second positive sequence component U 2P, a second negative sequence component U 2N, and a second zero sequence component U 2Z of the second power grid are calculated.
In this embodiment, the preset characteristic threshold includes a three-phase voltage protection threshold U DU;
If any one component of the first negative sequence component U 1N and the first zero sequence component U 1Z of the first power grid is not zero, the first running state is set to be an abnormal state;
if any one component of the second negative sequence component U 2N and the second zero sequence component U 2Z of the second power grid is not zero, the second running state is set to be an abnormal state;
when only a first positive sequence component U 1P exists in the first power grid; if any one of the first a-phase voltage characteristic signal U 1A, the first B-phase voltage characteristic signal U 1B and the first C-phase voltage characteristic signal U 1C is not less than the three-phase voltage protection threshold U DU, the first running state is set to be an abnormal state; if the first a-phase voltage characteristic signal U 1A, the first B-phase voltage characteristic signal U 1B, and the first C-phase voltage characteristic signal U 1C are all smaller than the three-phase voltage protection threshold value U DU, the first operation state is set to be a normal state;
when only the second positive sequence component U 2P exists in the second power grid, if any one of the second a-phase voltage characteristic signal U 2A, the second B-phase voltage characteristic signal U 2B and the second C-phase voltage characteristic signal U 2C is not smaller than the three-phase voltage protection threshold value U DU, the second operation state is set to be an abnormal state; if the second a-phase voltage characteristic signal U 2A, the second B-phase voltage characteristic signal U 2B, and the second C-phase voltage characteristic signal U 2C are all smaller than the three-phase voltage protection threshold U DU, the second operating state is set to be a normal state.
In the above embodiment, the abnormal state is not determined instantaneously, but when the signal is the starting time point, and a preset delay time elapses, the corresponding voltage characteristic signal or component is still in the condition of being considered to be abnormal, and the running state of the power grid is determined to be the abnormal state. For example, when the first power grid has a first negative sequence component U 1N that is not zero, after the t delay time, the first power grid still has a first negative sequence component U 1N that is not zero, and the operation state of the first power grid is determined to be an abnormal state; for another example, when the first power grid has a first negative sequence component U 1N that is not zero, after the t delay time, the first negative sequence component U 1N in the first power grid is eliminated, but the first zero sequence component U 1Z that is not zero is also found, the running state of the first power grid is also considered to be an abnormal state.
In this embodiment, if the first/second power grid only has a positive sequence component and a zero sequence component, the current power grid is determined to be a two-phase short-circuit ground fault;
if the first/second power grid only has a positive sequence component and a negative sequence component, judging that the current power grid is a two-phase short circuit fault;
if the first/second power grid has a positive sequence component, a negative sequence component and a zero sequence component at the same time, judging that the current power grid is a single-phase short circuit fault;
And if the first/second power grid only has positive sequence components and any three-phase voltage characteristic signal is not smaller than the three-phase voltage protection threshold value, judging that the current power grid is a three-phase short circuit fault.
In the above embodiment, specific faults of the current power grid are determined according to the values of the positive sequence component, the negative sequence component, the zero sequence component and the three-phase voltage characteristic signals, and the fault information is registered and reported.
In this embodiment, only at most one vacuum circuit breaker in the first vacuum circuit breaker and the second vacuum circuit breaker is in the switching-on state, so that the safety of the double-incoming-line vacuum circuit breaker isolation equipment during switching is ensured, and the electrified switching-on of the isolating switch is avoided.
In this embodiment, the switching action is performed while the first running state and the second running state are reported, and if an abnormal state exists, the corresponding fault information is reported at the same time.
According to the technical scheme, the switching method of the double-incoming-line vacuum circuit breaker isolation equipment extracts corresponding characteristic signals by analyzing respective power grid signals of the double power grids, judges the running states of the respective power grids according to the corresponding characteristic signals and the relation of preset characteristic thresholds, switches the first/second vacuum circuit breaker and the isolation switch according to the current power grid access condition and the running states of the double power grids, switches the subsequent power utilization into the power grid with a more stable running state, enables the whole important area to realize uninterrupted power utilization, realizes stable power supply and distribution, reduces the configuration of corresponding power energy storage equipment at the lower level of the power utilization area, and greatly reduces the backup power utilization cost.
Example 2
Referring to fig. 2 to 7, the technical scheme of the invention is vacuum isolation equipment, which comprises a first vacuum circuit breaker 1, a second vacuum circuit breaker 2, an isolating switch 3 and a controller 4; the first vacuum circuit breaker 1 and the second vacuum circuit breaker 2 are stacked, the first vacuum circuit breaker 1 and the second vacuum circuit breaker 2 are identical in structure, the first vacuum circuit breaker 1 and the second vacuum circuit breaker 2 comprise a vacuum tube 11, a wire inlet end 12 and a wire outlet end 13 which are connected to two ends of the vacuum tube 11, a circuit breaker transmission mechanism 14 which is in linkage fit with the vacuum tube 11, and a circuit breaker driving assembly 15 which drives the circuit breaker transmission mechanism 14 to act, and a voltage transformer 16 is connected to the wire inlet end 12; the isolating switch 3 comprises an isolating transmission mechanism 31, an isolating contact blade 32 connected with the isolating transmission mechanism 31 and an isolating driving assembly 33 for driving the isolating transmission mechanism 31 to act; the controller 4 is electrically connected with the voltage transformer 16, the breaker driving assembly 15 and the isolation driving assembly 33 respectively; the isolating contact blade 32 rotates along with the isolating driving assembly 33 to be electrically connected with the outlet end of the first vacuum circuit breaker 1, electrically connected with the outlet end of the second vacuum circuit breaker 2, in an isolating state and in a grounding state; the controller 4 performs the two-wire vacuum circuit breaker isolation apparatus switching method described in embodiment 1.
In the above embodiment, the incoming wire end 12 and the isolating contact blade 32 are mutually matched, so as to realize the electrical connection between the isolating switch 3 and the first vacuum circuit breaker 1 and the second vacuum circuit breaker 2 respectively.
In the above embodiment, the signal output terminal of the voltage transformer 16 is connected to the input terminal of the controller 4, and the output terminal of the controller 4 is connected to the driving input terminals of the breaker driving assembly 15 and the isolation driving assembly 33, respectively.
In this embodiment, the isolation transmission mechanism 31 includes an isolation rotating shaft 311 and a rotating side plate 312 connected to one side of the isolation rotating shaft 311, a first closing sensor 313, a second closing sensor 314, an isolation in-place sensor 315 and a grounding in-place sensor 316 are disposed on the isolation switch 3, the first closing sensor 313, the second closing sensor 314, the isolation in-place sensor 315 and the grounding in-place sensor 316 are electrically connected with the controller 4, the rotating side plate 312 is provided with an indication portion, and the indication portion rotates along with the rotating side plate 312 to pass through the first closing sensor 313, the second closing sensor 314, the isolation in-place sensor 315 and the grounding in-place sensor 316.
In the above embodiment, as shown in fig. 6, the indication portion may be an opening on the rotating side plate 312, and the first closing sensor 313, the second closing sensor 314, the isolating in-place sensor 315, and the grounding in-place sensor 316 are a photoelectric sensor and a proximity switch; in another embodiment, the indication part may also be a protruding part on the rotating side plate 312, where the first closing sensor 313, the second closing sensor 314, the isolating in-place sensor 315 and the grounding in-place sensor 316 are travel switches, and the protruding part touches the corresponding sensors to generate an action signal when passing through the corresponding sensors.
In the above embodiment, the signal output ends of the first closing sensor 313, the second closing sensor 314, the isolation in-place sensor 315, and the ground in-place sensor 316 are respectively connected to the signal input end of the controller 4.
In this embodiment, the breaker transmission mechanism 14 includes a breaker rotating shaft 141 and a rotating disc 142 connected to the breaker rotating shaft 141, a transmission groove 1421 is formed in the rotating disc 142, a movable contact 111 is disposed on the vacuum tube 11, one end of the movable contact 111 is connected to the transmission groove 1421, the wire outlet end 13 is connected to the movable contact 111, two ends of the transmission groove 1421 are provided with a brake release sensor 143 and a brake switch 144, and the brake release sensor 143 and the brake switch 144 are respectively electrically connected to the controller 4.
In the above embodiment, the opening sensor 143 and the closing sensor 144 detect the closing state and the opening state of the current vacuum circuit breaker, respectively; the signal output ends of the opening sensor 143 and the closing sensor 144 are respectively connected to the signal input end of the controller 4.
The vacuum isolation equipment is provided with the double-vacuum circuit breaker and the isolating switch, the isolating switch is provided with a four-station structure of first closing, second closing and isolating and grounding, and four modes of conducting the first vacuum circuit breaker-isolating switch, conducting the second vacuum circuit breaker-isolating switch, disconnecting the vacuum circuit breaker from the isolating switch and grounding the isolating switch are realized, so that an implementation basis is provided for the switching method of the double-inlet-wire vacuum circuit breaker isolating equipment in the embodiment 1.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The switching method of the isolation equipment of the double-incoming-line vacuum circuit breaker is characterized by comprising the following steps of:
s100, respectively acquiring a first power grid signal of a power grid where a first vacuum circuit breaker is located and a second power grid signal of the power grid where a second vacuum circuit breaker is located;
s200, respectively carrying out feature extraction on the first power grid signal and the second power grid signal to obtain a first feature signal and a second feature signal;
S300, respectively judging a first running state of a power grid where the first vacuum circuit breaker is located and a second running state of the power grid where the second vacuum circuit breaker is located according to a preset characteristic threshold value, the first characteristic signal and the second characteristic signal;
S400, according to the first operation state and the second operation state, executing at least one of the following switching actions:
s410, keeping the currently-used vacuum circuit breaker in a closing state, keeping the isolating switch connected to the currently-used vacuum circuit breaker, and keeping the non-used vacuum circuit breaker in a separating state;
S420, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to the non-used vacuum circuit breaker, and switching on the non-used vacuum circuit breaker;
S430, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to an isolating state, and keeping the non-used vacuum circuit breaker in the switching-off state;
If the first running state and the second running state are both normal states, keeping the currently-used vacuum circuit breaker in a closing state, keeping the isolating switch connected to the currently-used vacuum circuit breaker, and keeping the non-used vacuum circuit breaker in a separating state;
If the first running state and the second running state are in a normal state and an abnormal state respectively; if the power grid in the normal state is the power grid where the vacuum circuit breaker which is currently in use is located, keeping the vacuum circuit breaker which is currently in use in a closing state, keeping the isolating switch connected to the vacuum circuit breaker which is currently in use, and keeping the vacuum circuit breaker which is not in use in a separating state; if the power grid in the abnormal state is the power grid where the current vacuum circuit breaker is located, opening the current vacuum circuit breaker, switching the isolating switch from the current vacuum circuit breaker to the non-vacuum circuit breaker, and closing the non-vacuum circuit breaker;
If the first running state and the second running state are abnormal states, switching off the currently-used vacuum circuit breaker, switching the isolating switch from the currently-used vacuum circuit breaker to the isolating state, and keeping the non-used vacuum circuit breaker in the switching-off state;
Acquiring an equipment maintenance signal, and switching the isolating switch from an isolating state to a grounding state;
if the current vacuum circuit breaker is available, switching off the current vacuum circuit breaker, and directly switching the isolating switch from the current vacuum circuit breaker to a grounding state;
if the vacuum circuit breaker is not currently in use, the isolating switch is directly switched to a grounding state from an isolating state;
The first characteristic signals comprise a first a-phase voltage characteristic signal U 1A, a first B-phase voltage characteristic signal U 1B and a first C-phase voltage characteristic signal U 1C which are extracted from the first power grid signal, n first a-phase voltage characteristic signals U 1A, first B-phase voltage characteristic signals U 1B and first C-phase voltage characteristic signals U 1C at the same moment are selected, and a first positive sequence component U 1P, a first negative sequence component U 1N and a first zero sequence component U 1Z of a first power grid are calculated;
The second characteristic signal includes a second a-phase voltage characteristic signal U 2A, a second B-phase voltage characteristic signal U 2B, and a second C-phase voltage characteristic signal U 2C extracted from the second power grid signal, n second a-phase voltage characteristic signals U 2A, second B-phase voltage characteristic signals U 2B, and second C-phase voltage characteristic signals U 2C at the same time are selected, and a second positive sequence component U 2P, a second negative sequence component U 2N, and a second zero sequence component U 2Z of the second power grid are calculated.
2. The method for switching an isolation device of a double incoming line vacuum circuit breaker according to claim 1, wherein,
The preset characteristic threshold comprises a three-phase voltage protection threshold U DU;
If any one component of the first negative sequence component U 1N and the first zero sequence component U 1Z of the first power grid is not zero, the first running state is set to be an abnormal state;
if any one component of the second negative sequence component U 2N and the second zero sequence component U 2Z of the second power grid is not zero, the second running state is set to be an abnormal state;
when only a first positive sequence component U 1P exists in the first power grid; if any one of the first a-phase voltage characteristic signal U 1A, the first B-phase voltage characteristic signal U 1B and the first C-phase voltage characteristic signal U 1C is not less than the three-phase voltage protection threshold U DU, the first running state is set to be an abnormal state; if the first a-phase voltage characteristic signal U 1A, the first B-phase voltage characteristic signal U 1B, and the first C-phase voltage characteristic signal U 1C are all smaller than the three-phase voltage protection threshold value U DU, the first operation state is set to be a normal state;
when only the second positive sequence component U 2P exists in the second power grid, if any one of the second a-phase voltage characteristic signal U 2A, the second B-phase voltage characteristic signal U 2B and the second C-phase voltage characteristic signal U 2C is not smaller than the three-phase voltage protection threshold value U DU, the second operation state is set to be an abnormal state; if the second a-phase voltage characteristic signal U 2A, the second B-phase voltage characteristic signal U 2B, and the second C-phase voltage characteristic signal U 2C are all smaller than the three-phase voltage protection threshold U DU, the second operating state is set to be a normal state.
3. The method for switching an isolation device of a double incoming line vacuum circuit breaker according to claim 2, wherein,
If the first/second power grid only has a positive sequence component and a zero sequence component, judging that the current power grid is a two-phase short circuit ground fault;
if the first/second power grid only has a positive sequence component and a negative sequence component, judging that the current power grid is a two-phase short circuit fault;
if the first/second power grid has a positive sequence component, a negative sequence component and a zero sequence component at the same time, judging that the current power grid is a single-phase short circuit fault;
And if the first/second power grid only has positive sequence components and any three-phase voltage characteristic signal is not smaller than the three-phase voltage protection threshold value, judging that the current power grid is a three-phase short circuit fault.
4. A method of switching a double incoming line vacuum circuit breaker isolation device according to any one of claims 1 to 3, wherein at most only one of said first vacuum circuit breaker and said second vacuum circuit breaker is in a closed state.
5. A method of switching a double-incoming line vacuum circuit breaker isolation device according to any one of claims 1 to 3, characterized in that said first operating state and said second operating state are reported at the same time as said switching action is performed.
6. The vacuum isolation device is characterized by comprising a first vacuum circuit breaker, a second vacuum circuit breaker, an isolating switch and a controller; the first vacuum circuit breaker and the second vacuum circuit breaker are stacked, the first vacuum circuit breaker and the second vacuum circuit breaker comprise vacuum tubes, wire inlet ends and wire outlet ends connected to two ends of the vacuum tubes, a circuit breaker transmission mechanism in linkage fit with the vacuum tubes and a circuit breaker driving assembly for driving the circuit breaker transmission mechanism to act, and the wire inlet ends are connected with voltage transformers; the isolating switch comprises an isolating transmission mechanism, an isolating touch knife connected with the isolating transmission mechanism and an isolating driving assembly for driving the isolating transmission mechanism to act; the controller is respectively and electrically connected with the voltage transformer, the breaker driving assembly and the isolation driving assembly; the isolation contact knife rotates along with the isolation driving assembly to be electrically connected with the outlet end of the first vacuum circuit breaker, electrically connected with the outlet end of the second vacuum circuit breaker, in an isolation state and in a grounding state; the controller performs the two-wire vacuum circuit breaker isolation apparatus switching method of any one of claims 1 to 5.
7. The vacuum isolation device according to claim 6, wherein the isolation transmission mechanism comprises an isolation rotating shaft and a rotating side plate connected to one side of the isolation rotating shaft, the isolation switch is provided with a first closing sensor, a second closing sensor, an isolation in-place sensor and a grounding in-place sensor, the first closing sensor, the second closing sensor, the isolation in-place sensor and the grounding in-place sensor are electrically connected with the controller, the rotating side plate is provided with an indication part, and the indication part rotates along with the rotating side plate to pass through the first closing sensor, the second closing sensor, the isolation in-place sensor and the grounding in-place sensor.
8. The vacuum isolation device according to claim 6, wherein the circuit breaker transmission mechanism comprises a circuit breaker rotating shaft and a rotating disc connected to the circuit breaker rotating shaft, a transmission groove is formed in the rotating disc, a movable contact is arranged on the vacuum tube, one end of the movable contact is connected in the transmission groove, the wire outlet end is connected to the movable contact, a brake opening sensor and a brake closing sensor are arranged at two ends of the transmission groove, and the brake opening sensor and the brake closing sensor are respectively and electrically connected with the controller.
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| CN202410399686.XA CN117995600B (en) | 2024-04-03 | 2024-04-03 | Switching method of double-incoming-line vacuum circuit breaker isolation equipment and vacuum isolation equipment |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2110914U (en) * | 1992-01-10 | 1992-07-22 | 阎立新 | Dual-power auto-interlocking switching device |
| FR2735914A1 (en) * | 1995-06-22 | 1996-12-27 | Gec Alsthom T & D Sa | Medium tension gas-insulated electricity distribution installation |
| KR20000012287U (en) * | 1998-12-16 | 2000-07-05 | 이구택 | Abnormal operation detection device of vacuum circuit breaker |
| KR20070092590A (en) * | 2006-03-09 | 2007-09-13 | (주)서전기전 | Medium voltage switch-gear |
| CN201210454Y (en) * | 2008-03-24 | 2009-03-18 | 郑文秀 | Intelligent dual-power switching device |
| RU2406199C1 (en) * | 2009-06-30 | 2010-12-10 | Закрытое акционерное общество "ЧЕБОКСАРСКИЙ ЭЛЕКТРОМЕХАНИЧЕСКИЙ ЗАВОД" | DEVICE FOR SECTIONING AIR AND CABLE LINES FOR 35 kV POWER SUPPLY SYSTEMS |
| CN102412622A (en) * | 2011-12-05 | 2012-04-11 | 珠海市丰兰实业有限公司 | Electric mechanical interlocking type two-incoming-line and one-bus-couple system |
| CN102751779A (en) * | 2011-04-20 | 2012-10-24 | 信赖控制公司 | Transfer Switch For Automatically Switching Between Alternative Energy Source And Utility Grid |
| CN105390333A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨朗昇电气股份有限公司 | Fast double-power transfer switch and switching control method |
| CN205724862U (en) * | 2016-04-18 | 2016-11-23 | 国网山东省电力公司巨野县供电公司 | A kind of electricity network automatic protection equipment |
| CN107994680A (en) * | 2017-12-26 | 2018-05-04 | 宁波安通电气科技有限公司 | Intelligent high-voltage dual power automatic switching control equipment |
| CN110349793A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | One kind being switched fast switching device, system and application |
| CN212518411U (en) * | 2020-07-31 | 2021-02-09 | 佛山市佳华电气科技有限公司 | Power supply interconnection interlocking power distribution room |
| CN112768287A (en) * | 2019-10-21 | 2021-05-07 | 浙江南洋输配电设备有限公司 | Aerify cabinet circuit breaker with three-station isolator |
| CN115662822A (en) * | 2022-10-10 | 2023-01-31 | 中铁第一勘察设计院集团有限公司 | Totally-enclosed insulated isolating switch |
| CN117476389A (en) * | 2022-07-21 | 2024-01-30 | 中国石油化工股份有限公司 | Four-station isolating switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7973253B2 (en) * | 2008-12-10 | 2011-07-05 | Eaton Corporation | Neutral draw-out automatic transfer switch assembly and associated method |
-
2024
- 2024-04-03 CN CN202410399686.XA patent/CN117995600B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2110914U (en) * | 1992-01-10 | 1992-07-22 | 阎立新 | Dual-power auto-interlocking switching device |
| FR2735914A1 (en) * | 1995-06-22 | 1996-12-27 | Gec Alsthom T & D Sa | Medium tension gas-insulated electricity distribution installation |
| KR20000012287U (en) * | 1998-12-16 | 2000-07-05 | 이구택 | Abnormal operation detection device of vacuum circuit breaker |
| KR20070092590A (en) * | 2006-03-09 | 2007-09-13 | (주)서전기전 | Medium voltage switch-gear |
| CN201210454Y (en) * | 2008-03-24 | 2009-03-18 | 郑文秀 | Intelligent dual-power switching device |
| RU2406199C1 (en) * | 2009-06-30 | 2010-12-10 | Закрытое акционерное общество "ЧЕБОКСАРСКИЙ ЭЛЕКТРОМЕХАНИЧЕСКИЙ ЗАВОД" | DEVICE FOR SECTIONING AIR AND CABLE LINES FOR 35 kV POWER SUPPLY SYSTEMS |
| CN102751779A (en) * | 2011-04-20 | 2012-10-24 | 信赖控制公司 | Transfer Switch For Automatically Switching Between Alternative Energy Source And Utility Grid |
| CN102412622A (en) * | 2011-12-05 | 2012-04-11 | 珠海市丰兰实业有限公司 | Electric mechanical interlocking type two-incoming-line and one-bus-couple system |
| CN105390333A (en) * | 2015-12-23 | 2016-03-09 | 哈尔滨朗昇电气股份有限公司 | Fast double-power transfer switch and switching control method |
| CN205724862U (en) * | 2016-04-18 | 2016-11-23 | 国网山东省电力公司巨野县供电公司 | A kind of electricity network automatic protection equipment |
| CN107994680A (en) * | 2017-12-26 | 2018-05-04 | 宁波安通电气科技有限公司 | Intelligent high-voltage dual power automatic switching control equipment |
| CN110349793A (en) * | 2018-08-09 | 2019-10-18 | 安徽合凯电气科技股份有限公司 | One kind being switched fast switching device, system and application |
| CN112768287A (en) * | 2019-10-21 | 2021-05-07 | 浙江南洋输配电设备有限公司 | Aerify cabinet circuit breaker with three-station isolator |
| CN212518411U (en) * | 2020-07-31 | 2021-02-09 | 佛山市佳华电气科技有限公司 | Power supply interconnection interlocking power distribution room |
| CN117476389A (en) * | 2022-07-21 | 2024-01-30 | 中国石油化工股份有限公司 | Four-station isolating switch |
| CN115662822A (en) * | 2022-10-10 | 2023-01-31 | 中铁第一勘察设计院集团有限公司 | Totally-enclosed insulated isolating switch |
Non-Patent Citations (2)
| Title |
|---|
| AVC系统电容器投入不成功原因分析及控制措施;周杰;;科技风;20181207(第35期);全文 * |
| 备用状态下线路开关的过电压保护问题探讨;蒋毅, 周卫华;湖南电力;20050825(第04期);全文 * |
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