CN113224734A - Method and terminal for realizing line auxiliary protection - Google Patents
Method and terminal for realizing line auxiliary protection Download PDFInfo
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- CN113224734A CN113224734A CN202110491823.9A CN202110491823A CN113224734A CN 113224734 A CN113224734 A CN 113224734A CN 202110491823 A CN202110491823 A CN 202110491823A CN 113224734 A CN113224734 A CN 113224734A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000004590 computer program Methods 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000010248 power generation Methods 0.000 abstract description 6
- 230000006870 function Effects 0.000 description 25
- 230000008569 process Effects 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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Classifications
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- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- 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
- H02H7/22—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 distribution gear, e.g. bus-bar systems; for switching devices
Abstract
The invention discloses a method and a terminal for realizing auxiliary protection of a line, wherein corresponding overcurrent protection is added for each interval in bus differential protection, and then the overcurrent protection corresponding to a target interval is started when the target interval of the auxiliary protection of the line is needed to be put into the bus differential protection, so that the line protection function is performed on the target interval; compared with the existing protection method only depending on the line protection device, the method has the advantages that the overcurrent auxiliary protection function is added in the bus differential protection, the protection effect on the corresponding interval during the quitting period of the line protection device is started by means of the overcurrent auxiliary protection function, the safety guarantee is provided for each interval of the bus differential protection, the load loss of a user and the power generation loss of a power plant are reduced, and the reliability of power supply is improved.
Description
Technical Field
The invention relates to the field of relay protection, in particular to a method and a terminal for realizing auxiliary protection of a line.
Background
The line protection device is mainly used for protecting, measuring and controlling line interval units of various voltage levels, has perfect protection, measurement, control and communication monitoring functions, provides a complete solution for protecting and controlling a transformer substation, a power plant, high-low voltage power distribution and a power system of the power plant, and can effectively ensure the safe and stable operation of a power grid.
One of the defects of the current line protection device in the practical use process is as follows: when the line protection device is locked, abnormal or quits operation, the primary equipment also needs to be powered off, otherwise the protection function is lost. Because if the line protection device does not protect the primary equipment and the transmission line is still running, the line fault is easy to trip to the main transformer in a grade-overriding way, which not only does not meet the regulation requirement, but also can cause the power failure range to be expanded. Moreover, if this is the case, a primary equipment outage will cause unnecessary power outages to the power plant or users or affect the reliability of the power supply, causing unnecessary loss of load or power generation loss from the power plant, etc.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method and the terminal for realizing the line auxiliary protection enable primary equipment to be free of power failure when the line protection device exits, and reliability of power supply is improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for realizing line auxiliary protection comprises the following steps:
s1, adding corresponding overcurrent protection for each interval in the bus differential protection;
s2, judging whether a target interval needing to be put into line auxiliary protection exists in the bus differential protection, if so, executing a step S3, otherwise, returning to continue executing S2;
and S3, enabling the overcurrent protection corresponding to the target interval, and performing a line protection effect on the target interval.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
the terminal for realizing the line auxiliary protection comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the steps of the method for realizing the line auxiliary protection.
In conclusion, the beneficial effects of the invention are as follows: providing a method and a terminal for realizing auxiliary protection of a line, adding overcurrent protection corresponding to each interval of bus differential protection, when the protection of a line protection device is lost at a target interval, using the overcurrent protection to play a line protection role on the target interval, so that primary equipment connected with the target interval can continue to operate under the protection condition without power failure caused by the loss of the protection of the line protection device, and preventing expanded line fault accidents caused by the unprotected operation of the equipment, compared with the existing protection method only depending on the line protection device, by adding the auxiliary overcurrent protection function in the bus differential protection, starting the protection role on the corresponding interval during the quitting of the line protection device by means of the auxiliary overcurrent protection function, providing safety guarantee for each interval of the bus differential protection, and reducing the load loss of a user and the power generation loss of a power plant, the reliability of power supply is improved.
Drawings
Fig. 1 is a schematic step diagram of a method for implementing line auxiliary protection according to an embodiment of the present invention;
fig. 2 is a logic diagram of a protection function of a method for implementing line auxiliary protection according to an embodiment of the present invention;
fig. 3 is a system block diagram of a terminal for implementing line auxiliary protection according to an embodiment of the present invention.
Description of reference numerals:
1. a terminal for realizing auxiliary protection of a line; 2. a processor; 3. a memory.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 2, a method for implementing line auxiliary protection includes the following steps:
s1, adding corresponding overcurrent protection for each interval in the bus differential protection;
s2, judging whether a target interval needing to be put into line auxiliary protection exists in the bus differential protection, if so, executing a step S3, otherwise, returning to continue executing S2;
and S3, enabling the overcurrent protection corresponding to the target interval, and performing a line protection effect on the target interval.
From the above description, the beneficial effects of the present invention are: providing a method and a terminal for realizing auxiliary protection of a line, adding overcurrent protection corresponding to each interval of bus differential protection, when the protection of a line protection device is lost at a target interval, using the overcurrent protection to play a line protection role on the target interval, so that primary equipment connected with the target interval can continue to operate under the protection condition without power failure caused by the loss of the protection of the line protection device, and preventing expanded line fault accidents caused by the unprotected operation of the equipment, compared with the existing protection method only depending on the line protection device, by adding the auxiliary overcurrent protection function in the bus differential protection, starting the protection role on the corresponding interval during the quitting of the line protection device by means of the auxiliary overcurrent protection function, providing safety guarantee for each interval of the bus differential protection, and reducing the load loss of a user and the power generation loss of a power plant, the reliability of power supply is improved.
Further, each interval has a control word and a pressure plate corresponding to its overcurrent protection;
enabling the overcurrent protection corresponding to the target interval comprises: and simultaneously inputting a control word and a pressure plate corresponding to the overcurrent protection corresponding to the target interval to start the overcurrent protection corresponding to the target interval.
As can be seen from the above description, in the specific implementation process of the overcurrent protection, the overcurrent protection is put into or withdrawn from the corresponding control word and the corresponding pressure plate, so that the self function of the bus differential protection is not affected, the putting-in or withdrawing mode is simple and convenient, and the integrity of the overcurrent protection function can be ensured.
Further, the line protection function for the target interval specifically includes:
collecting the current and the bus voltage of the target interval;
and judging whether the overcurrent protection corresponding to the target interval acts or not according to the current and the bus voltage, if so, executing the action of the overcurrent protection to trip and disconnect the target interval, and if not, returning to the step of acquiring the current and the bus voltage of the target interval.
From the above description, the collected current and bus voltage of the target interval are used as the basis for judging whether the overcurrent protection action is performed or not, and after the collected data of the target interval are found to meet the action execution condition of certain overcurrent protection, that is, the target interval has a line fault, the action is immediately executed, the target interval is tripped, the connection relation between the target interval and the bus is timely disconnected, the line fault of the target interval is prevented from tripping to the main transformer in a grade-exceeding mode to cause the expansion of the power failure accident range, and the line protection function is realized.
Further, before the line protection function is performed on the target interval, the method further comprises the following steps:
judging whether an interval starting element of overcurrent protection corresponding to the target interval is started or not, and if so, performing a line protection effect on the target interval; otherwise, returning to the step of judging whether the interval starting element of the overcurrent protection corresponding to the interval is started or not.
As can be seen from the above description, after the interval overcurrent auxiliary protection is embedded into the busbar differential protection, if and only if the start condition of the interval start element of the overcurrent protection reaches and starts, the protection process in the overcurrent protection, that is, the fault handling process is performed on the target interval. The interval starting element can timely reflect the fault or abnormal condition of the target interval, thereby ensuring that the protection function can be timely implemented when the fault occurs.
Further, the step S3 is preceded by the step of:
and correspondingly setting the setting value of the interval starting element as a preset multiple of the minimum overcurrent constant value of the overcurrent protection.
From the above description, setting the setting value of the interval starting element of the overcurrent protection can increase the starting sensitivity of the interval starting element, thereby increasing the response speed of the overcurrent protection to the fault of the target interval and performing more reliable line protection on the target interval.
Further, the overcurrent protection includes at least one of a re-voltage direction overcurrent protection and a zero sequence direction overcurrent protection.
As can be seen from the above description, the bus differential protection is added with the overcurrent protection of at least one of the complex voltage direction overcurrent protection and the zero sequence direction overcurrent protection corresponding to each interval. The over-current protection in the voltage resetting direction is over-current protection locked by composite voltage, can perform protection action when a short-circuit fault occurs in an interval line, prevent protection misoperation caused by the fact that some non-faults but current is instantly increased and the voltage is not large, and improve the reliability of protection operation. The zero sequence direction overcurrent protection is formed by utilizing zero sequence current generated when the power transmission line has ground fault, can reflect the spaced ground fault and implements protection; and the reliability is further improved by adopting various overcurrent protection modes.
Further, the re-pressing direction overcurrent protection and the zero sequence direction overcurrent protection are two-segment type or three-segment type overcurrent protection.
From the above description, it can be known that the re-pressing direction overcurrent protection and the zero sequence direction overcurrent protection can both be set with multi-stage protection. Different setting values and different time delays are set for the protection of different sections, so that the reliability, selectivity, rapidity and sensitivity of overcurrent protection can be improved.
Further, the step S1 is specifically:
and embedding an overcurrent protection program corresponding to each interval in the busbar differential protection, wherein the overcurrent protection program and the busbar differential protection share hardware equipment.
From the above description, it can be known that the program for implementing the overcurrent protection function is added to the bus differential protection in an embedded manner, and no additional current transformer loop, voltage transformer loop, trip outlet loop and protection device are required to be added, so that the equipment cost is not increased.
Further, step S3 is preceded by:
and judging whether the differential starting element of the bus differential protection is started, if so, executing the bus differential protection, otherwise, executing the step S3.
As is apparent from the above description, the bus bar protection has a priority over the overcurrent protection, that is, when the differential startup element of the bus bar protection is started, the bus bar protection is preferentially performed regardless of whether the startup element of the overcurrent protection is started. Compared with intervals, the main differential main transformer has a more important position in the whole power supply network, and when the main differential main transformer is abnormal, the main differential main transformer is protected preferentially, so that the loss caused by power supply faults can be reduced to the minimum in time, and the fault influence range is narrowed to a small extent.
Referring to fig. 3, a terminal 1 for implementing line auxiliary protection includes a memory 3, a processor 2, and a computer program stored in the memory 3 and executable on the processor 2, where the processor 2 implements each step of the method for implementing line auxiliary protection when executing the computer program.
From the above description, the beneficial effects of the present invention are: providing a method and a terminal for realizing auxiliary protection of a line, adding overcurrent protection corresponding to each interval of bus differential protection, when the protection of a line protection device is lost at a target interval, using the overcurrent protection to play a line protection role on the target interval, so that primary equipment connected with the target interval can continue to operate under the protection condition without power failure caused by the loss of the protection of the line protection device, and preventing expanded line fault accidents caused by the unprotected operation of the equipment, compared with the existing protection method only depending on the line protection device, by adding the auxiliary overcurrent protection function in the bus differential protection, starting the protection role on the corresponding interval during the quitting of the line protection device by means of the auxiliary overcurrent protection function, providing safety guarantee for each interval of the bus differential protection, and reducing the load loss of a user and the power generation loss of a power plant, the reliability of power supply is improved.
Referring to fig. 1 and fig. 2, a first embodiment of the present invention is:
a method for implementing line auxiliary protection, as shown in fig. 1, includes the following steps:
s1, adding corresponding overcurrent protection for each interval in the bus differential protection;
in this embodiment, step S1 is specifically performed by embedding an overcurrent protection program corresponding to each interval in the bus differential protection. And, the overcurrent protection program and the bus differential protection share hardware equipment. In other words, the present embodiment does not need to add any additional hardware cost such as a current transformer loop, a voltage transformer loop, a trip outlet, etc.; wherein, the bus differential protection can be 110kV bus differential protection.
As shown in fig. 2, in the present embodiment, the overcurrent protection is divided into two types: one is the over-current protection in the voltage resetting direction; and the other is zero-sequence direction overcurrent protection. Specifically, the double-voltage direction overcurrent protection and the zero-sequence direction overcurrent protection are two-stage or three-stage overcurrent protection. In other equivalent embodiments, the overcurrent protection may also be other overcurrent protection with a line protection function, and the number of protection stages thereof may also be changed according to the actual situation.
S2, judging whether a target interval needing to be put into line auxiliary protection exists in the bus differential protection, if so, executing a step S3, otherwise, returning to continue executing S2;
in the running process of a power grid, after the protection of the interval line connected with the primary equipment is quitted, the corresponding primary equipment is subjected to power failure. When power failure occurs in the primary equipment due to the situation, the electric quantity of the power plant is lost, inconvenience is brought to users, and the reliability of power supply is affected. In addition, in this case, if the primary equipment continues to operate, override trip is likely to occur when a line fault occurs, and the power failure range is expanded, resulting in greater loss.
And S3, starting overcurrent protection corresponding to the target interval, and performing a line protection function on the target interval.
In this embodiment, after the above situation is determined to occur, the overcurrent protection corresponding to the target interval is enabled, so that the primary equipment connected to the target interval can continue to operate under the protection condition without power failure due to loss of the protection of the line protection device, and an expanded line fault accident due to unprotected operation of the equipment is prevented. Specifically, each interval has a control word and a clamp plate corresponding to its overcurrent protection. In addition, as shown in fig. 2, in the embodiment, the control word corresponding to the overcurrent protection corresponding to the target interval and the pressing plate including the soft pressing plate and the hard pressing plate are simultaneously input to start the overcurrent protection corresponding to the target interval, the input and exit modes are simple, and the integrity of the overcurrent protection function is ensured.
In addition, in the present embodiment, before performing step S3, it is further determined whether the differential start element of the bus differential protection is started, if so, the bus differential protection is performed, otherwise, step S3 is performed. Although the corresponding overcurrent protection is added for each interval in the bus differential protection, when the target interval and the bus differential main transformer simultaneously have abnormal conditions, the bus differential protection still needs to be preferentially executed so as to reduce the loss caused by the power supply fault to the minimum and reduce the range of the fault influence.
Referring to fig. 2, the second embodiment of the present invention is:
on the basis of the first embodiment, the method for implementing line auxiliary protection needs to perform the following steps before performing a line protection function on a target interval:
and after the overcurrent protection corresponding to the target interval is started, correspondingly setting the setting value of the interval starting element as a preset multiple of the minimum overcurrent constant value of the overcurrent protection. Specifically, the preset multiple is preferably 0.9 times. In other equivalent embodiments, the preset times can be set to other preset times according to actual conditions. The setting value of the interval starting element influences the starting sensitivity of the interval starting element, and the interval starting element can be prevented from being started mistakenly under the condition of non-line faults.
Further, whether an interval starting element of the overcurrent protection corresponding to the target interval is started or not is judged, and if yes, a circuit protection effect is performed on the target interval; otherwise, the whole group is reset after a certain time delay, and the step of judging whether the interval starting element of the overcurrent protection corresponding to the interval is started or not is returned.
In this embodiment, after the overcurrent protection is put into the bus differential protection, if and only if the start condition of the interval start element of the overcurrent protection reaches and starts, the protection process in the overcurrent protection, that is, the fault handling process is performed on the target interval. The interval starting element can timely reflect the fault or abnormal condition of the target interval, thereby ensuring that the protection function can be timely implemented when the fault occurs.
As shown in fig. 2, the specific process of performing the line protection function on the target interval is as follows:
first, the current and bus voltage of the target interval are collected. Specifically, the target interval can be judged by the position of the bus-side blade that is connected to the bus differential protection.
Then, judging whether the overcurrent protection corresponding to the target interval acts or not according to the current and the bus voltage;
and finally, if the overcurrent protection needs to act, the overcurrent protection performs the action to trip and disconnect the target interval, otherwise, the step of collecting the current and the bus voltage of the target interval is returned to.
Referring to fig. 3, a third embodiment of the present invention is:
a terminal 1 for implementing line auxiliary protection, as shown in fig. 3, includes a memory 3, a processor 2, and a computer program stored on the memory 3 and executable on the processor 2, and when the processor 2 executes the computer program, the terminal implements a method for implementing line auxiliary protection according to one or two of the above embodiments.
In summary, the present invention discloses a method and a terminal for implementing auxiliary protection of a line, wherein overcurrent protection is correspondingly added at each interval of bus differential protection by means of inputting a control word and a pressing plate, and the overcurrent protection includes at least one of a re-pressing direction overcurrent protection and a zero-sequence direction overcurrent protection; when the protection of the line protection device is lost at a target interval, the overcurrent protection is used for performing a line protection function on the target interval, the sensitivity of an interval starting element of the overcurrent protection is adjusted to increase the reliability of the overcurrent protection by collecting numerical values such as the current of the target interval as a judgment basis for judging whether the trip protection needs to be continued, so that primary equipment connected with the target interval can continue to operate under the protection condition without power failure caused by the loss of the protection of the line protection device, and the expanded line fault accident caused by the unprotected operation of the equipment is prevented; compared with the existing protection method only depending on a line protection device, the overcurrent auxiliary protection function is added in the bus differential protection, the overcurrent protection for the corresponding interval during the exit period of the line protection device is added by means of the overcurrent auxiliary protection function, an overcurrent protection program and bus differential protection share hardware equipment, extra hardware facilities are not needed, safety guarantee is provided for each interval of the bus differential protection, the load loss of a user and the power generation loss of a power plant are reduced, and the reliability of power supply is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the contents of the present specification and the drawings, or applied to the related technical fields directly or indirectly, are included in the scope of the present invention.
Claims (10)
1. A method for realizing auxiliary protection of a line is characterized by comprising the following steps:
s1, adding corresponding overcurrent protection for each interval in the bus differential protection;
s2, judging whether a target interval needing to be put into line auxiliary protection exists in the bus differential protection, if so, executing a step S3, otherwise, returning to continue executing S2;
and S3, enabling the overcurrent protection corresponding to the target interval, and performing a line protection effect on the target interval.
2. The method for implementing auxiliary line protection of claim 1, wherein each interval has a control word and a pressure plate corresponding to its overcurrent protection;
enabling the overcurrent protection corresponding to the target interval comprises: and simultaneously inputting a control word and a pressure plate corresponding to the overcurrent protection corresponding to the target interval to start the overcurrent protection corresponding to the target interval.
3. The method for implementing line auxiliary protection according to claim 1, wherein the performing of line protection on the target interval specifically includes:
collecting the current and the bus voltage of the target interval;
and judging whether the overcurrent protection corresponding to the target interval acts or not according to the current and the bus voltage, if so, executing the action of the overcurrent protection to trip and disconnect the target interval, and if not, returning to the step of acquiring the current and the bus voltage of the target interval.
4. The method for implementing line-assisted protection according to claim 3, wherein the method for performing line protection on the target interval further comprises the following steps:
judging whether an interval starting element of overcurrent protection corresponding to the target interval is started or not, and if so, performing a line protection effect on the target interval; otherwise, returning to the step of judging whether the interval starting element of the overcurrent protection corresponding to the interval is started or not.
5. The method for implementing line auxiliary protection according to claim 4, wherein the step S3 is preceded by the steps of:
and correspondingly setting the setting value of the interval starting element as a preset multiple of the minimum overcurrent constant value of the overcurrent protection.
6. The method for implementing auxiliary line protection according to any one of claims 1 to 5, wherein the over-current protection includes at least one of a re-voltage direction over-current protection and a zero-sequence direction over-current protection.
7. The method of claim 6, wherein the double-voltage direction overcurrent protection and the zero-sequence direction overcurrent protection are two-stage or three-stage overcurrent protection.
8. The method for implementing line auxiliary protection according to claim 1, wherein the step S1 specifically includes:
and embedding an overcurrent protection program corresponding to each interval in the busbar differential protection, wherein the overcurrent protection program and the busbar differential protection share hardware equipment.
9. The method for implementing line auxiliary protection according to claim 1, wherein the step S3 is preceded by:
and judging whether the differential starting element of the bus differential protection is started, if so, executing the bus differential protection, otherwise, executing the step S3.
10. A terminal for implementing line auxiliary protection, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of a method for implementing line auxiliary protection according to any one of claims 1 to 9 when executing the computer program.
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| CN202110491823.9A CN113224734B (en) | 2021-05-06 | 2021-05-06 | Implementation method and terminal for auxiliary protection of line |
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| CN202110491823.9A CN113224734B (en) | 2021-05-06 | 2021-05-06 | Implementation method and terminal for auxiliary protection of line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498540A (en) * | 2022-02-07 | 2022-05-13 | 华能铜川照金煤电有限公司 | Auxiliary protection on-line setting and control method for plant power distribution system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151085U (en) * | 2013-01-25 | 2013-08-21 | 上海山源电子电气科技发展有限公司 | Coal mine power distribution network intelligent protection system |
| CN103683218A (en) * | 2013-12-18 | 2014-03-26 | 南京国电南自电网自动化有限公司 | Distributed bus protection device based on HSR |
| CN104362599A (en) * | 2014-11-13 | 2015-02-18 | 国家电网公司 | Method for protecting low-voltage bus of intelligent substation |
| CN110311359A (en) * | 2019-06-05 | 2019-10-08 | 许继集团有限公司 | A kind of DC distribution net networking protection system |
| CN110556794A (en) * | 2019-09-12 | 2019-12-10 | 中国南方电网有限责任公司超高压输电公司柳州局 | Bus bar protection configuration method of multi-end hybrid direct current system |
| CN111900696A (en) * | 2020-07-15 | 2020-11-06 | 中国人民解放军海军工程大学 | Shore power relay protection system and method for AC-DC coexistence power supply |
-
2021
- 2021-05-06 CN CN202110491823.9A patent/CN113224734B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203151085U (en) * | 2013-01-25 | 2013-08-21 | 上海山源电子电气科技发展有限公司 | Coal mine power distribution network intelligent protection system |
| CN103683218A (en) * | 2013-12-18 | 2014-03-26 | 南京国电南自电网自动化有限公司 | Distributed bus protection device based on HSR |
| CN104362599A (en) * | 2014-11-13 | 2015-02-18 | 国家电网公司 | Method for protecting low-voltage bus of intelligent substation |
| CN110311359A (en) * | 2019-06-05 | 2019-10-08 | 许继集团有限公司 | A kind of DC distribution net networking protection system |
| CN110556794A (en) * | 2019-09-12 | 2019-12-10 | 中国南方电网有限责任公司超高压输电公司柳州局 | Bus bar protection configuration method of multi-end hybrid direct current system |
| CN111900696A (en) * | 2020-07-15 | 2020-11-06 | 中国人民解放军海军工程大学 | Shore power relay protection system and method for AC-DC coexistence power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114498540A (en) * | 2022-02-07 | 2022-05-13 | 华能铜川照金煤电有限公司 | Auxiliary protection on-line setting and control method for plant power distribution system |
| CN114498540B (en) * | 2022-02-07 | 2024-03-19 | 华能铜川照金煤电有限公司 | Auxiliary protection online setting and control method for power distribution system for factory |
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| CN113224734B (en) | 2024-02-20 |
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