CN117373851A - Closing interlocking method suitable for user demarcation switch - Google Patents
Closing interlocking method suitable for user demarcation switch Download PDFInfo
- Publication number
- CN117373851A CN117373851A CN202311666810.6A CN202311666810A CN117373851A CN 117373851 A CN117373851 A CN 117373851A CN 202311666810 A CN202311666810 A CN 202311666810A CN 117373851 A CN117373851 A CN 117373851A
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- China
- Prior art keywords
- switch
- closing
- interlocking element
- interlocking
- unlocking
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012423 maintenance Methods 0.000 claims description 8
- 230000001788 irregular Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a closing interlocking method suitable for a user demarcation switch, which specifically comprises the following steps: a closing interlocking element is arranged at the primary switch side; after the primary switch trips after the fault, the closing interlocking element is in a locking state and does not allow the primary switch to close; after the primary switch side or the secondary terminal side is unlocked, the closing interlocking element is in an unlocking state, and closing is allowed to be executed; and after the primary switch is switched on successfully, the power supply is recovered, and after the primary switch is switched on and the fault trips, the switching-on interlocking element is switched into a locking state again. The invention relates to the technical field of power distribution automation, and particularly provides a closing interlocking method suitable for a user demarcation switch.
Description
Technical Field
The invention relates to the technical field of power distribution automation, in particular to a closing interlocking method suitable for a user demarcation switch.
Background
User demarcation refers to the responsibility demarcation point of the main line and the branch line users, and faults inside the demarcation point are defined as user faults, and commonly have phase-to-phase short-circuit faults and single-phase grounding faults. In early distribution networks, the line-to-line boundary point between the main line and the branch line of the overhead line was typically only equipped with an isolation knife switch (or drop-out fuse) as a line protection control device. When a fault occurs in the user (inside the responsible demarcation point), equipment at the demarcation point cannot be rapidly cut off after the user faults, and the protection action on the main line of the overhead line is caused by the override, so that the power loss of the distribution line is caused, and the power loss range is enlarged. The system belongs to user branches and user equipment of user property rights, most structures are mixed, equipment is old and protected behind, management and regular maintenance are lacking, and faults and hidden dangers are increased year by year. After the user loses power, the situation that the trial-and-error demarcation switch resumes power supply exists, and secondary fault tripping is often caused.
Disclosure of Invention
Aiming at the situation, in order to make up the existing defects, the invention provides a closing interlocking method suitable for a user demarcation switch, and the method utilizes manual and electric unlocking operations of a closing interlocking element, a primary switch side and a secondary terminal side to avoid the risk of re-failure caused by unauthorized closing of the user side after failure, and the user side is forced to improve the quality and operation and maintenance level of own power supply equipment, and the overall power supply reliability of a power grid.
The invention provides the following technical scheme: the invention provides a closing interlocking method suitable for a user demarcation switch, which specifically comprises the following steps:
step 1: the primary switch side is provided with a closing interlocking element: the switching-on interlocking element can be independently switched on and off, and has no influence on the switching-on and switching-off behavior of the primary switch after the switching-on interlocking element is withdrawn;
step 2: after the primary switch trips after the fault, the closing interlocking element is in a locking state and does not allow the primary switch to close;
step 3: after the primary switch side or the secondary terminal side is unlocked, the closing interlocking element is in an unlocking state, and closing is allowed to be executed;
step 4: and after the primary switch is switched on successfully, the power supply is recovered, and after the primary switch is switched on and the fault trips, the switching-on interlocking element is switched into a locking state again.
Further, the switching-on interlocking element in the step 1 can be independently switched on or off, and is automatically in a locking state after the primary switch breaks down when the switching-on interlocking element is switched on, so that switching-on is not allowed; the switch-on interlocking element is in an unlocking state when being withdrawn, and the switch-on of the primary switch is not influenced.
Further, when the closing interlocking element in the step 2 is in a locking state, the primary switch side is supported to be unlocked through manual operation, and an interface for manually unlocking the primary switch side adopts an irregular concave shape and is operated by adopting a matched tool.
Further, when the closing interlocking element in the step 2 is in a locking state, the unlocking is supported on the secondary terminal side through manual operation or electric operation; the command support of the secondary terminal side electric unlocking is transmitted remotely or through a matched operation and maintenance tool, and the unlocking command needs to be subjected to security check before being transmitted.
Furthermore, the interface for manual unlocking of the secondary terminal side adopts an irregular concave shape, and a matched tool is required to be used for operation.
Further, when the closing interlocking element in the step 3 is in a locking state, unlocking operation of the primary switch side and unlocking operation of the secondary terminal side are independent from each other and are not influenced.
Further, after the closing interlocking element in step 4 is unlocked, one-time closing operation is allowed to be executed, and after closing failure, the closing interlocking element automatically turns into a locking state.
The beneficial effects obtained by the invention by adopting the structure are as follows: compared with the prior art, the closing interlocking method suitable for the user demarcation switch has the beneficial effects that: after the demarcation switch trips due to faults at the user side, secondary faults caused by the fact that the user tries to fit the demarcation switch before clear faults are avoided. The function limits the unauthorized closing of a user, and the effect of preventing the unauthorized closing of the user is achieved no matter the primary switch side is manually operated or the secondary terminal is driven. Only after the grid personnel permit the unlocking operation, the user is allowed to conduct the closing operation. After the closing interlocking element is added, trial closing operation can be effectively avoided, the quality and the operation and maintenance level of the power equipment are improved at the user side, and the overall power supply reliability of the power distribution network is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is an overall flow diagram of the present invention;
fig. 2 is a schematic structural diagram of a closing interlocking element configured on a primary switch side in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a secondary terminal side unlock interface in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a key handle corresponding to a secondary terminal side unlocking interface in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the 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.
It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Example 1
As shown in fig. 1, a closing interlocking method suitable for a user demarcation switch includes the following steps:
(1) As shown in fig. 2, a primary switch side is internally provided with a closing interlocking element, and a primary switch side unlocking operation shaft adopts a customized design: the boss flange cover is arranged outside the operating shaft part, so that the operating shaft part is embedded, and the unlocking operation by users is effectively avoided; the boss flange cover adopts an internally tangent chamfer design, plays a certain guiding role when the operation handle is in butt joint with the operation shaft, and is convenient for the operation and maintenance operation under the rod;
(2) As shown in fig. 3 and 4, the secondary terminal side unlocking interface adopts a removable key type design. The interface is customized by adopting a nonstandard structure (the illustration is only an example), so that common hexagons, disposable shapes and the like are avoided, and a user is prevented from using common kits or tools to make handles. The secondary terminal side adopts an inward concave design, a handle of keys adopts a nonstandard interface design, and can be pulled out for storage by power grid personnel at ordinary times and is connected when the secondary side is required to be manually operated;
(3) The secondary terminal side is configured with a remote unlocking command, and can receive remote control or instruction unlocking of an operation and maintenance tool in a remote control mode; the secondary terminal side configures a local command of local unlocking command, and electric unlocking can be executed on the secondary side after a correct password is input;
(4) After the user side trips the fault demarcation switch, the user side checks the fault, and applies for unlocking after confirming the fault is cleared;
(5) From the viewpoint of convenient operation and maintenance, in most cases, a power grid personnel releases a closing authority through a remote unlocking command; when the communication with the remote place is interrupted, the power grid personnel can release the closing permission by executing a local unlocking command on the secondary terminal side or executing manual unlocking on the secondary terminal side; for the condition of power failure or hardware failure of the secondary terminal, a power grid personnel can release the closing permission by manually unlocking at the primary switch side;
(6) The demarcation switch allows to execute a closing operation after the permission is released, if the closing is successful, the fault of the user side is cleared, and the user side resumes the power supply operation; if the switching-on fails, the fault at the user side still exists, the switching-on interlocking element is switched to be in a locked state for operation, the user side needs to continuously check the fault, and the unlocking authority is applied again after the fault is clear.
It is noted that 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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The closing interlocking method suitable for the user demarcation switch is characterized by comprising the following steps of:
step 1: the primary switch side is provided with a switching-on interlocking element, the switching-on interlocking element can be independently switched on and off, and the switching-on and switching-off actions of the primary switch are not influenced after the switching-on interlocking element is switched off;
step 2: after the primary switch trips after the fault, the closing interlocking element is in a locking state and does not allow the primary switch to close;
step 3: after the primary switch side or the secondary terminal side is unlocked, the closing interlocking element is in an unlocking state, and closing is allowed to be executed;
step 4: and after the primary switch is switched on successfully, the power supply is recovered, and after the primary switch is switched on and the fault trips, the switching-on interlocking element is switched into a locking state again.
2. The method for interlocking a switch-on of a user demarcation switch according to claim 1, wherein the interlocking element for interlocking a switch-on in step 1 can be independently switched on or off, and is automatically in a locking state after the switch is tripped out once a fault occurs when the interlocking element for interlocking a switch-on is switched on, and the interlocking element for interlocking a switch-on is not allowed to be switched on; the switch-on interlocking element is in an unlocking state when being withdrawn, and the switch-on of the primary switch is not influenced.
3. The closing interlocking method suitable for the user demarcation switch according to claim 1, wherein when the closing interlocking element in the step 2 is in a locking state, the opening is supported to be manually operated and unlocked at a primary switch side, and an interface for manually operating and unlocking at the primary switch side adopts an irregular concave shape and is operated by adopting a matched tool.
4. The closing interlocking method suitable for the user demarcation switch according to claim 3, wherein when the closing interlocking element in the step 2 is in a locked state, the unlocking is supported on a secondary terminal side through manual operation or electric operation; the command support of the secondary terminal side electric unlocking is transmitted remotely or through a matched operation and maintenance tool, and the unlocking command needs to be subjected to security check before being transmitted.
5. The method for locking a switch-on lock for a user demarcation switch according to claim 4, wherein the manually operated unlocking interface at the secondary terminal side is irregularly concave and must be operated by a matched tool.
6. The closing interlocking method for a user demarcation switch according to claim 5, wherein when the closing interlocking element in step 3 is in a locked state, the unlocking operation of the primary switch side and the unlocking operation of the secondary terminal side are independent of each other and do not affect each other.
7. The closing interlocking method suitable for the user demarcation switch according to claim 1, wherein after the closing interlocking element is unlocked in the step 4, one closing operation is allowed to be executed, and after the closing failure, the closing interlocking element is automatically turned into a locking state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311666810.6A CN117373851B (en) | 2023-12-07 | 2023-12-07 | Closing interlocking method suitable for user demarcation switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311666810.6A CN117373851B (en) | 2023-12-07 | 2023-12-07 | Closing interlocking method suitable for user demarcation switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117373851A true CN117373851A (en) | 2024-01-09 |
| CN117373851B CN117373851B (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311666810.6A Active CN117373851B (en) | 2023-12-07 | 2023-12-07 | Closing interlocking method suitable for user demarcation switch |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333773U (en) * | 2011-11-16 | 2012-07-11 | 泰豪科技(深圳)电力技术有限公司 | Protection device for high-voltage capacitor |
| CN204905849U (en) * | 2015-08-27 | 2015-12-23 | 常州电子研究所有限公司 | User boundary switch controller |
| CN111952972A (en) * | 2020-08-19 | 2020-11-17 | 中国能源建设集团湖南省电力设计院有限公司 | Main distribution integrated load transfer method for high-quality power supply service |
| CN112448305A (en) * | 2019-09-03 | 2021-03-05 | 新乡华源电力集团有限公司 | Outdoor landing high-voltage demarcation electric energy metering box with mechanical interlock |
| CN217956437U (en) * | 2022-08-26 | 2022-12-02 | 北京博瑞莱智能科技周口有限公司 | Metering box of floor boundary switch |
| CN115954242A (en) * | 2023-02-07 | 2023-04-11 | 常州博瑞电力自动化设备有限公司 | Circuit breaker interlocking device |
-
2023
- 2023-12-07 CN CN202311666810.6A patent/CN117373851B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333773U (en) * | 2011-11-16 | 2012-07-11 | 泰豪科技(深圳)电力技术有限公司 | Protection device for high-voltage capacitor |
| CN204905849U (en) * | 2015-08-27 | 2015-12-23 | 常州电子研究所有限公司 | User boundary switch controller |
| CN112448305A (en) * | 2019-09-03 | 2021-03-05 | 新乡华源电力集团有限公司 | Outdoor landing high-voltage demarcation electric energy metering box with mechanical interlock |
| CN111952972A (en) * | 2020-08-19 | 2020-11-17 | 中国能源建设集团湖南省电力设计院有限公司 | Main distribution integrated load transfer method for high-quality power supply service |
| CN217956437U (en) * | 2022-08-26 | 2022-12-02 | 北京博瑞莱智能科技周口有限公司 | Metering box of floor boundary switch |
| CN115954242A (en) * | 2023-02-07 | 2023-04-11 | 常州博瑞电力自动化设备有限公司 | Circuit breaker interlocking device |
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| Publication number | Publication date |
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| CN117373851B (en) | 2024-03-08 |
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