CN111969557B - Main transformer protection method, system, storage medium and computer equipment - Google Patents
Main transformer protection method, system, storage medium and computer equipment Download PDFInfo
- Publication number
- CN111969557B CN111969557B CN202010997994.4A CN202010997994A CN111969557B CN 111969557 B CN111969557 B CN 111969557B CN 202010997994 A CN202010997994 A CN 202010997994A CN 111969557 B CN111969557 B CN 111969557B
- Authority
- CN
- China
- Prior art keywords
- tripping
- main transformer
- protection
- state
- disconnecting link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a main transformer protection method, a main transformer protection system, a storage medium and computer equipment, which can realize the correspondence of the on-off and operation modes of a main transformer protection tripping outlet loop, realize the self-adaptive function of a protection loop, make the protection tripping more selective, prevent the problem of accident expansion caused by protection misoperation or refusal operation, and ensure the safe and stable operation of a power grid. Meanwhile, the invention can timely and effectively find the problem that the protection outlet pressure plate is inconsistent with the actual operation mode, and prompt operation and maintenance personnel through the alarm information, thereby being beneficial to processing and solving the problem as early as possible, avoiding the occurrence of protection misoperation or refusal operation caused by human negligence or loop looseness, and providing a more effective and practical monitoring means.
Description
Technical Field
The invention relates to the technical field of power grid protection fault identification and isolation, in particular to a main transformer protection method, a main transformer protection system, a storage medium and computer equipment.
Background
With the increasing complexity of the power grid, the fault of the power grid equipment is accurately and quickly removed, the power failure range is reduced to the maximum extent, and the method becomes an important purpose of the relay protection device. The main transformer protection is important protection of the transformer and accessory equipment thereof, and also is backup protection of buses, feeders and other adjacent equipment.
In the existing 220kV main transformer protection, when a bus has multiple sections, such as a double-bus double-section or a double-bus single-section, because a main transformer protection device does not acquire bus disconnecting link position information corresponding to each side switch of a main transformer, the current actual operating state cannot be judged, that is, it is unknown on which section of bus each side switch operates at this time, once a power grid fault meets main transformer protection tripping logic and time limit, the protection tripping loses selectivity, and directly sends out a command for tripping the bus coupler, the section and each side switch of the main transformer, and it is impossible to adaptively select a correct bus coupler and section switch according to the actual operating mode, and it is easy to mistakenly trip the bus coupler and section switch which are not in electrical contact with the bus coupler and section switch, so that the power failure range is expanded, and the safe and stable power supply of the system is affected. In addition, the on-off state of a bus coupler or a sectional tripping pressure plate in a main transformer protection tripping outlet loop at present needs to be carried out by operation and maintenance personnel according to an actual operation mode, so that protection misoperation or refusal action is easily caused by artificial negligence, error throwing or missing throwing of the outlet pressure plate; and because the consistency of the state of the pressing plate and the running mode is checked by lacking an intelligent identification means, the abnormal state cannot be found in time and early warning cannot be carried out.
China patents with the publication number of 2020.01.07 and the application publication number of CN 109728566B provide a method for preventing misoperation of a pressure plate with risks during the regular inspection of main transformer protection, but the scheme still has certain limitations and cannot effectively solve the technical problems.
Disclosure of Invention
Aiming at the limitation of the prior art, the invention provides a main transformer protection method, a system, a storage medium and computer equipment, and the technical scheme adopted by the invention is as follows:
a main transformer protection method, the main transformer protection method carries on the fault isolation through the adaptive tripping process, report an emergency and defend mistake through the state checking process;
wherein the adaptive trip process comprises the steps of:
judging whether the running state of the main transformer meets the protection action condition or not;
if the protection action condition is met, judging whether a closing point exists at an auxiliary contact of a bus disconnecting link position relay arranged in the tripping circuit;
if the closing point exists, judging whether a tripping outlet pressing plate is at the input position;
if a tripping outlet pressure plate is at the input position, isolating the fault by tripping a tripping coil of a tripping circuit where the closing point is located;
the state checking process comprises the following steps:
judging whether the corresponding trip outlet pressing plates of the main transformer are all in the input positions in the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the trip outlet pressing plates; if not, an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer is sent.
Compared with the prior art, the method can realize the correspondence between the on-off and the operation mode of the main transformer protection tripping outlet loop, realize the self-adaptive function of the protection loop, make the protection tripping more selective, prevent the problem of accident expansion caused by protection misoperation or failure operation and ensure the safe and stable operation of the power grid. Meanwhile, the invention can effectively find the problem that the protection outlet pressure plate is inconsistent with the actual operation mode in time, and prompts operation and maintenance personnel through the alarm information, thereby being beneficial to processing and solving the problem as early as possible, avoiding the occurrence of protection misoperation or refusal caused by human negligence or loop looseness, and providing a more effective and practical monitoring means.
As a preferred scheme, the state checking process further includes the following steps:
and judging whether the information of the opening amount of the position of the bus disconnecting link and the switching state of the tripping outlet pressing plate is complete or not.
Further, the state checking process further includes the following steps:
and acquiring the opening amount of the position of the bus disconnecting link through an auxiliary contact of a bus disconnecting link position relay arranged in the tripping loop.
Further, the state checking process further includes the following steps:
and acquiring the switching state of the tripping outlet pressure plate.
Further, after the step of judging whether the running state of the main transformer meets the protection action condition, other steps are carried out after preset time delay.
Further, judging whether the tripping outlet pressing plates corresponding to the main transformer in the current operation mode are all in the input position or not according to the input amount of the bus disconnecting link position and the input and output state of the tripping outlet pressing plates; if not, sending an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer:
and after a preset time delay, sending an alarm that the state of the pressure plate is inconsistent with the running mode of the main transformer.
The present invention also provides the following:
a main transformer protection system comprises a self-adaptive tripping protection module and a state checking module;
the adaptive trip protection module comprises: a protection action condition judgment sub-module, a closing point judgment sub-module, a trip outlet pressing plate judgment sub-module and a fault isolation sub-module;
the protection action condition judgment submodule is used for judging whether the running state of the main transformer meets the protection action condition or not;
the closing point judgment sub-module is used for judging whether a bus disconnecting link position relay auxiliary contact arranged in a tripping circuit has a closing point or not when a protection action condition is met;
the trip outlet pressing plate judgment submodule is used for judging whether a trip outlet pressing plate is in a throwing position or not when the closing point exists;
the fault isolation sub-module is used for isolating faults by tripping off a tripping coil of a tripping circuit where the closing point is located when the tripping outlet pressure plate is at the putting-in position;
the state checking module comprises a checking alarm submodule, and the checking alarm submodule is used for judging whether the corresponding tripping outlet pressing plates of the main transformer are all at the input position in the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the tripping outlet pressing plates; if not, an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer is sent.
Compared with the prior art, the main transformer protection system effectively solves the problems existing between the existing main transformer protection and the power grid operation mode, improves the selectivity and the accuracy of fault isolation, prevents incorrect protection actions caused by artificial factors, avoids the occurrence of artificial accidents, and effectively ensures the safe and stable operation of a power system.
In a preferred scheme, the state checking module further comprises an information integrity judging submodule, and the information integrity judging submodule is used for judging whether the information of the opening amount of the position of the bus disconnecting link and the switching state of the tripping outlet pressing plate is complete or not.
A storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for protecting a primary substation as described above.
A computer device comprising a storage medium, a processor and a computer program stored in the storage medium and executable by the processor, the computer program, when executed by the processor, implementing the steps of the primary protection method as described above.
Drawings
Fig. 1 is a flowchart of a main transformer protection method according to an embodiment of the present invention;
fig. 2 is a flowchart of an adaptive trip process of a main transformer protection method according to an embodiment of the present invention;
fig. 3 is a flowchart of a state checking process of a main transformer protection method according to embodiment 1 of the present invention;
FIG. 4 is a diagram of a typical 220kV primary main wiring;
fig. 5 is a schematic diagram of a main transformer protection adaptive trip circuit of a double-bus double-section wiring in the process of implementing the embodiment of the present invention;
FIG. 6 is a schematic diagram of a bus disconnecting link position open loop of the main transformer protection in the process of the embodiment of the present invention;
fig. 7 is a flowchart of a state checking process of a main transformer protection method according to embodiment 2 of the present invention;
fig. 8 is a schematic diagram of a main transformer protection system according to an embodiment of the present invention;
fig. 9 is a schematic diagram of an adaptive trip protection module of a main transformer protection system according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a state checking module of the main transformer protection system according to an embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the embodiments described are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims. In the description of the present application, it is to be understood that the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not necessarily used to describe a particular order or sequence, nor are they to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The invention is further illustrated below with reference to the figures and examples.
In order to solve the limitation of the prior art, this embodiment provides a technical solution, and the technical solution of the present invention is further described below with reference to the drawings and the embodiments.
Referring to fig. 1 and 2 and fig. 3, a main transformer protection method performs fault isolation through an adaptive trip process S01, and performs alarm and error prevention through a state check process S02;
wherein the adaptive trip process S01 comprises the steps of:
s011, judging whether the running state of the main transformer meets a protection action condition;
s012, if the protection action condition is met, judging whether the auxiliary contact of the bus disconnecting link position relay in the tripping circuit has a closing point;
s013, if the closing point exists, judging whether a tripping outlet pressing plate is in the input position;
s014, if a tripping outlet pressure plate is at the input position, isolating the fault by tripping a tripping coil of a tripping loop where the closing point is located;
the state checking process S02 includes the steps of:
s024, judging whether the corresponding tripping outlet pressing plates of the main transformer are all at the input positions in the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the tripping outlet pressing plates; if not, an alarm indicating that the state of the pressure plate is inconsistent with the running mode of the main transformer is sent out.
Compared with the prior art, the method can realize the correspondence between the on-off and the operation mode of the main transformer protection tripping outlet loop, realize the self-adaptive function of the protection loop, make the protection tripping more selective, prevent the problem of accident expansion caused by protection misoperation or failure operation and ensure the safe and stable operation of the power grid. Meanwhile, the invention can timely and effectively find the problem that the protection outlet pressure plate is inconsistent with the actual operation mode, and prompt operation and maintenance personnel through the alarm information, thereby being beneficial to processing and solving the problem as early as possible, avoiding the occurrence of protection misoperation or refusal operation caused by human negligence or loop looseness, and providing a more effective and practical monitoring means.
When a certain bus disconnecting link is closed, a disconnecting link position relay loop is conducted, the relay acts to close an auxiliary contact of the disconnecting link position relay, once a protection action condition is met and a fault occurs, the protection action is started, and a tripping loop is communicated; the auxiliary contact of the bus disconnecting link which is not closed, and the tripping loop is opened. Through the mode, the self-adaptive tripping of the main transformer protection is realized.
In the adaptive trip process S01 and the state checking process S02, if the determination result of one of the steps is negative, the corresponding subsequent step may be terminated.
Specifically, referring to a typical 220kV primary main connection diagram in fig. 4 and a main transformer protection adaptive trip circuit of a double-bus double-subsection connection in fig. 5 adjusted by a main transformer protection method according to an embodiment of the present invention, taking an example that a #1 main transformer high-voltage switch 1M disconnecting link is in a closed position, a 2M disconnecting link is in a separated position (i.e., the main transformer operates in 1M), and bus couplers 2012 and 2056 are in a separated position, subsections 2015 and 2026 are in a closed position, since the main transformer operates in 1M, an auxiliary contact of the bus disconnecting link is closed, an auxiliary contact of the 2M disconnecting link is opened, a 1DZJ relay in fig. 5 operates, so that the 1DZJ1 node is closed, when a power grid fails, a main transformer backup protection operates, the protection automatically trips 2015 in a subsection, the switches of the main transformer are not tripped, the 2M, 5M and 6M buses continue to operate normally, only the 1/4 bus is powered off, and a power outage range is minimized. Other operation modes can also finish the self-adaptive selection of the main transformer protection tripping through a self-adaptive loop, and are not listed.
Further, please refer to the bus disconnecting link position of the main transformer protection of fig. 6 adjusted by the main transformer protection method according to the embodiment of the present invention, which is opened into a loop, and the main transformer protection can acquire the bus disconnecting link position through the loop; the invention fully utilizes the important information of the position of the bus disconnecting link, not only applies the bus disconnecting link to a tripping circuit, but also transmits the bus disconnecting link to a main transformer protection system as an important input value. The consistency of the switch position input amount and the switching state of the trip protection outlet pressing plate is checked, and alarm information is sent out when the switch position input amount and the switching state of the trip protection outlet pressing plate are inconsistent, so that the problem that the switch position input amount and the trip protection outlet pressing plate are mistakenly switched on and off by operation and maintenance personnel and cannot be found is solved, and the safe and reliable operation of a power grid is guaranteed.
Specifically, taking the #1 main transformer as an example, if the #1 main transformer runs on a 2M bus, the 2M disconnecting link is opened to be checked with outlet pressure plates of the #1 main transformer protection jumps 2012 and 2026; the logic of the other sides is identical to that of the high-voltage side and is not listed.
As a preferred embodiment, the state checking process S02 further includes the steps of:
and S023, judging whether the information of the opening amount of the position of the bus disconnecting link and the switching state of the tripping outlet pressing plate is complete.
Further, referring to fig. 7, the state checking process further includes the following steps:
and S021, acquiring the input amount of the position of the bus disconnecting link through an auxiliary contact of a bus disconnecting link position relay arranged in the tripping circuit.
Further, the state checking process further includes the following steps:
and S022, obtaining the throwing and withdrawing states of the tripping outlet pressing plate.
Further, after the step of judging whether the running state of the main transformer meets the protection action condition, other steps are carried out after preset time delay.
Further, whether the corresponding tripping outlet pressing plates of the main transformer are all in the input positions in the current operation mode is judged according to the input amount of the bus disconnecting link position and the input and output states of the tripping outlet pressing plates; if not, sending an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer:
and after a preset time delay, sending an alarm that the state of the pressure plate is inconsistent with the running mode of the main transformer.
False alarm may be caused due to the possibility of signal jitter in the loop, and the influence caused by the signal jitter can be effectively avoided through a delay measure.
Referring to fig. 8 to 10, the present invention further provides the following:
a main transformer protection system comprises a self-adaptive tripping protection module 1 and a state checking module 2;
the adaptive trip protection module 1 comprises: a protection action condition judgment submodule 11, a closing point judgment submodule 12, a trip outlet pressing plate judgment submodule 13 and a fault isolation submodule 14;
the protection action condition judgment submodule 11 is configured to judge whether the operation state of the main transformer meets a protection action condition;
the closing point judgment submodule 12 is used for judging whether a bus disconnecting link position relay auxiliary contact arranged in a tripping circuit has a closing point or not when a protection action condition is met;
the trip outlet pressing plate judgment submodule 13 is used for judging whether a trip outlet pressing plate is in a putting position or not when the closing point exists;
the fault isolation submodule 14 is used for isolating faults by tripping a tripping coil of a tripping circuit where the closing point is located when a tripping outlet pressure plate is in a putting-in position;
the state checking module 2 comprises a checking alarm submodule 22, and the checking alarm submodule 22 is used for judging whether the corresponding tripping outlet pressing plates of the main transformer are all in the input position under the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the tripping outlet pressing plates; if not, an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer is sent.
Compared with the prior art, the main transformer protection system effectively solves the problems existing between the existing main transformer protection and the power grid operation mode, improves the selectivity and the accuracy of fault isolation, prevents incorrect protection actions caused by artificial factors, avoids the occurrence of artificial accidents, and effectively ensures the safe and stable operation of a power system.
In a preferred embodiment, the state checking module 2 further includes an information integrity judging submodule 21, and the information integrity judging submodule 21 is configured to judge whether information of the opening amount of the bus disconnecting link position and the on/off state of the trip outlet pressing plate is complete.
In a preferred embodiment, the intelligent tripping device further comprises an information acquisition module 3, wherein the information acquisition module 3 is used for acquiring the opening amount of the bus disconnecting link position and acquiring the switching state of the tripping outlet pressing plate through an auxiliary contact of a bus disconnecting link position relay arranged in the tripping loop.
The intelligent control system is characterized by further comprising a display module 4 which is respectively connected with the self-adaptive tripping protection module 1, the state checking module 2 and the information acquisition module 3, wherein the display module 4 is used for displaying the running conditions of the self-adaptive tripping protection module 1, the state checking module 2 and the information acquisition module 3.
A storage medium, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the main transformer protection method as described above.
A computer device comprising a storage medium, a processor and a computer program stored in the storage medium and executable by the processor, the computer program, when executed by the processor, implementing the steps of the primary protection method as described above.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A main transformer protection method is characterized in that fault isolation is carried out through a self-adaptive tripping process, and alarm and error prevention are carried out through a state checking process;
wherein the adaptive trip process comprises the steps of:
judging whether the running state of the main transformer meets the protection action condition or not;
if the protection action condition is met, judging whether a closing point exists at an auxiliary contact of a bus disconnecting link position relay arranged in the tripping circuit;
if the closing point exists, judging whether a tripping outlet pressing plate is at the input position;
if a tripping outlet pressure plate is at the input position, isolating the fault by tripping a tripping coil of a tripping circuit where the closing point is located;
the state checking process comprises the following steps:
acquiring the switching state of a tripping outlet pressure plate; acquiring the opening amount of the position of the bus disconnecting link through an auxiliary contact of a bus disconnecting link position relay arranged in the tripping loop; judging whether the information of the opening amount of the position of the bus disconnecting link and the switching state of the tripping outlet pressing plate is complete or not; judging whether the corresponding trip outlet pressing plates of the main transformer are all in the input positions in the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the trip outlet pressing plates; if not, an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer is sent.
2. The main transformer protection method according to claim 1, wherein after the step of determining whether the operating state of the main transformer satisfies the protection operation condition, the other steps are performed after a predetermined delay.
3. The main transformer protection method according to claim 1, wherein whether the tripping outlet pressing plate corresponding to the main transformer in the current operation mode is all in the input position is judged according to the input amount of the bus disconnecting link position and the input and output state of the tripping outlet pressing plate; if not, sending an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer:
after the preset time delay, the alarm that the pressure plate state is inconsistent with the main transformer operation mode is sent out.
4. A main transformer protection system is characterized by comprising a self-adaptive tripping protection module and a state checking module;
the adaptive trip protection module comprises: a protection action condition judgment submodule, a closing point judgment submodule, a trip outlet pressing plate judgment submodule and a fault isolation submodule;
the protection action condition judgment submodule is used for judging whether the running state of the main transformer meets the protection action condition;
the closing point judgment submodule is used for judging whether a bus disconnecting link position relay auxiliary contact arranged in a tripping circuit has a closing point or not when a protection action condition is met;
the trip outlet pressing plate judgment submodule is used for judging whether a trip outlet pressing plate is in a throwing position or not when the closing point exists;
the fault isolation sub-module is used for isolating faults by tripping off a tripping coil of a tripping circuit where the closing point is located when the tripping outlet pressure plate is at the putting-in position;
the state checking module comprises an information acquisition module, an information integrity judgment sub-module and a checking alarm sub-module, and the information acquisition module is used for acquiring the on-off state of the tripping outlet pressing plate; acquiring the input amount of the position of a bus disconnecting link through an auxiliary contact of a bus disconnecting link position relay arranged in a tripping loop; the information integrity judgment submodule is used for judging whether the information of the opening amount of the position of the bus disconnecting link and the switching state of the tripping outlet pressing plate is complete or not; the checking alarm submodule is used for judging whether the corresponding tripping outlet pressing plates of the main transformer are all at the input positions in the current operation mode according to the input amount of the bus disconnecting link position and the input and output states of the tripping outlet pressing plates; if not, an alarm that the state of the pressure plate is inconsistent with the operation mode of the main transformer is sent.
5. A storage medium having a computer program stored thereon, the computer program comprising: the computer program when being executed by a processor carries out the steps of the primary substation protection method according to any one of claims 1 to 3.
6. A computer device, characterized by: comprising a storage medium, a processor and a computer program stored in the storage medium and executable by the processor, the computer program when executed by the processor implementing the steps of the primary transformer protection method according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010997994.4A CN111969557B (en) | 2020-09-21 | 2020-09-21 | Main transformer protection method, system, storage medium and computer equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010997994.4A CN111969557B (en) | 2020-09-21 | 2020-09-21 | Main transformer protection method, system, storage medium and computer equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111969557A CN111969557A (en) | 2020-11-20 |
| CN111969557B true CN111969557B (en) | 2023-03-21 |
Family
ID=73386869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010997994.4A Active CN111969557B (en) | 2020-09-21 | 2020-09-21 | Main transformer protection method, system, storage medium and computer equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111969557B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0901698A1 (en) * | 1997-03-10 | 1999-03-17 | Square D Company | Ground fault protection circuit for a multiple source system |
| JP2011223721A (en) * | 2010-04-08 | 2011-11-04 | Mitsubishi Electric Corp | Switchgear |
| CN108471106A (en) * | 2018-04-17 | 2018-08-31 | 国网河南省电力公司电力科学研究院 | One kind is based on single mother partition mode of connection busbar interval secondary anti-misoperation method and device |
| CN108471164A (en) * | 2018-04-17 | 2018-08-31 | 国网河南省电力公司电力科学研究院 | A kind of for transformer protective device pressing plate intelligent measurement alarm method and device |
| CN108828344A (en) * | 2018-04-17 | 2018-11-16 | 国网河南省电力公司电力科学研究院 | One kind is for substation line protective device pressing plate detection alarm method and device |
| CN109728566A (en) * | 2018-08-22 | 2019-05-07 | 贵州电网有限责任公司 | Risky pressing plate anti-miscarrying method is directed to when a kind of main transformer protection regular inspection |
| CN111293673A (en) * | 2020-02-21 | 2020-06-16 | 广东电网有限责任公司 | Trip circuit for transformer backup protection |
-
2020
- 2020-09-21 CN CN202010997994.4A patent/CN111969557B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0901698A1 (en) * | 1997-03-10 | 1999-03-17 | Square D Company | Ground fault protection circuit for a multiple source system |
| JP2011223721A (en) * | 2010-04-08 | 2011-11-04 | Mitsubishi Electric Corp | Switchgear |
| CN108471106A (en) * | 2018-04-17 | 2018-08-31 | 国网河南省电力公司电力科学研究院 | One kind is based on single mother partition mode of connection busbar interval secondary anti-misoperation method and device |
| CN108471164A (en) * | 2018-04-17 | 2018-08-31 | 国网河南省电力公司电力科学研究院 | A kind of for transformer protective device pressing plate intelligent measurement alarm method and device |
| CN108828344A (en) * | 2018-04-17 | 2018-11-16 | 国网河南省电力公司电力科学研究院 | One kind is for substation line protective device pressing plate detection alarm method and device |
| CN109728566A (en) * | 2018-08-22 | 2019-05-07 | 贵州电网有限责任公司 | Risky pressing plate anti-miscarrying method is directed to when a kind of main transformer protection regular inspection |
| CN111293673A (en) * | 2020-02-21 | 2020-06-16 | 广东电网有限责任公司 | Trip circuit for transformer backup protection |
Non-Patent Citations (2)
| Title |
|---|
| 一起线路故障引起主变差动保护误动的分析;李杰;《电气技术》;20191215;第20卷(第12期);第112-115页 * |
| 智能变电站二次系统的检修及工程应用研究;李业峰;《中国优秀硕士学位论文全文数据库 电子期刊 工程科技II辑》;20180415(第4期);第29-35页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111969557A (en) | 2020-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2973918B1 (en) | Breaker design for power system resiliency | |
| CN104852469B (en) | Intelligent substation based on the equipment real-time status long-range method for preventing misoperation of soft pressing plate | |
| CN101752909B (en) | Remote checking method of operation circuit | |
| CN111458633B (en) | Tripping and closing monitoring circuit and fault alarming method | |
| CN112599370A (en) | Rail transit safety interlocking device | |
| CN109693689B (en) | Safety control system and method for traction cut-off | |
| CN111969557B (en) | Main transformer protection method, system, storage medium and computer equipment | |
| CN206038788U (en) | Analog switch for device overhaul is cut soon to power | |
| CN111585255B (en) | Trip monitoring loop | |
| CN214410995U (en) | Rail transit safety interlocking device | |
| CN111781539B (en) | Three-phase four-wire alternating current leakage detection circuit, device and vehicle | |
| CN213637065U (en) | Circuit for preventing misoperation of bus voltage parallel circuit | |
| CN213633724U (en) | Low-voltage circuit breaker operation circuit on-line monitoring device | |
| CN112098830A (en) | Function calibration equipment of automatic bus transfer device and automatic bus transfer device calibrator | |
| CN110838752B (en) | Method for removing damaged storage battery of substation storage battery pack without power outage | |
| CN110752409B (en) | Uninterrupted power supply of transformer substation storage battery pack for removing damage to storage battery system | |
| CN210092862U (en) | Temperature detection device capable of automatically cutting off control loop and circuit breaker | |
| CN209358241U (en) | A kind of internal bridge stub protection adaptively throws the control circuit moved back | |
| CN113401169A (en) | Control method, device and system based on signal lamp control circuit | |
| CN215833580U (en) | Short circuit detection device for power system | |
| EP0637866A1 (en) | A control and protection device for an electric system | |
| CN114899944B (en) | Communication management machine | |
| CN218449611U (en) | Monitoring device for anti-tripping loop | |
| CN221078835U (en) | Arc detection device and system | |
| CN212229104U (en) | Monitoring circuit of circuit breaker and circuit breaker for nuclear power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |