CN112448374A - Line protection method, system and device - Google Patents
Line protection method, system and device Download PDFInfo
- Publication number
- CN112448374A CN112448374A CN202011280590.XA CN202011280590A CN112448374A CN 112448374 A CN112448374 A CN 112448374A CN 202011280590 A CN202011280590 A CN 202011280590A CN 112448374 A CN112448374 A CN 112448374A
- Authority
- CN
- China
- Prior art keywords
- line
- protected
- circuit breaker
- determining
- circuit breakers
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims 6
- 208000017763 cutaneous neuroendocrine carcinoma Diseases 0.000 claims 6
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims 6
- 230000009471 action Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 1
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
- H02H7/26—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
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The application discloses a line protection method, a system and a device. Wherein, the method comprises the following steps: determining the number of circuit breakers in a line to be protected; when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and the modular multilevel converter MCC, and determining whether a line to be protected has a fault; and when the line to be protected has a fault, the plurality of circuit breakers are controlled to be opened and closed according to the relative position relation. The method and the device solve the technical problems that the normal working performance of the modular multilevel converter MCC is easy to interfere and the rejection rate is high due to the fact that the sequence of a plurality of circuit breakers is unreasonable when the circuit breakers perform closing or opening actions in the related technology.
Description
Technical Field
The present disclosure relates to the field of power, and in particular, to a method, a system, and an apparatus for protecting a line.
Background
In the related art, when a line fails, the line may be generally protected by using a circuit breaker, but in the related art, it is not considered that when an MMC is in a line with a plurality of circuit breakers, the circuit breaker is far away from the MCC and has different influences on the MCC, for example, when the circuit breaker closer to the MCC performs a closing action, a current circulating instantaneously may have a greater influence on the MCC, thereby affecting the normal working performance of the MCC.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a line protection method, a system and a device, which at least solve the technical problems that the normal working performance of a modular multi-level converter MCC is easy to be interfered and the rejection rate is high due to the fact that the sequence of a plurality of circuit breakers is unreasonable when the circuit breakers perform closing or opening actions in the related technology.
According to an aspect of an embodiment of the present application, there is provided a line protection method, including: determining the number of circuit breakers in a line to be protected; when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and the modular multilevel converter MCC, and determining whether a line to be protected has a fault; and when the line to be protected has a fault, the plurality of circuit breakers are controlled to be opened and closed according to the relative position relation.
Optionally, determining a relative position relationship between the plurality of circuit breakers and the modular multilevel converter MCC includes: taking the position of the MCC as an origin position, and taking the position relation between a first breaker at a first distance on the same side of the origin position and the origin position as a relative position relation; and taking the position of the MCC as an origin position, and taking the position relation between a second breaker at a second distance on the same side of the origin position and the origin position as a relative position relation, wherein the first distance is smaller than the second distance.
Optionally, the controlling the opening and closing of the plurality of circuit breakers according to the relative position relationship includes: and determining a first control instruction of the first circuit breaker and a second control instruction of the second circuit breaker based on the relative position relationship, wherein the first control instruction is used for indicating the first circuit breaker to be disconnected, and the second control instruction is used for indicating the second circuit breaker to be disconnected at intervals of a first preset time after the first circuit breaker is disconnected.
Optionally, determining whether the line to be protected has a fault includes: detecting whether a line section in which a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down or not, wherein the first circuit breaker is a starting point of the line section, and the second circuit breaker is an end point of the line section; and when the line section is detected to have a fault, determining that the line to be protected has the fault.
Optionally, detecting whether a line segment where a first breaker and a second breaker are located in the line to be protected has a fault includes: when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the terminal point are positive direction faults, determining that a line segment where the first circuit breaker and the second circuit breaker are located is in fault; and when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point are both in reverse direction faults, determining that no fault occurs in the line segment where the first circuit breaker and the second circuit breaker are located.
Optionally, when a line to be protected has a fault, after performing switching control on the plurality of circuit breakers according to the relative position relationship, the method includes: detecting whether the line to be protected is recovered to be normal or not, and determining that the line to be protected is recovered to be normal when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point are both in reverse direction faults; and under the condition that the line to be protected is determined to be normal, determining a third control instruction of the first circuit breaker and a fourth control instruction of the second circuit breaker based on the relative relation, wherein the third control instruction is used for instructing to close the second circuit breaker, and the third control instruction is used for closing the first circuit breaker at an interval of a second preset time after the second circuit breaker is closed.
Optionally, determining whether the line to be protected has a fault further includes: and when the line to be protected has no fault, the closed state of the circuit breaker is continuously maintained.
According to another aspect of the embodiments of the present application, there is also provided a line protection system, including: the computer equipment is used for determining the number of the circuit breakers in the line to be protected, determining the relative position relation between the plurality of circuit breakers and the modular multilevel converter MCC when the number of the circuit breakers is multiple, and determining whether the line to be protected has a fault; when a line to be protected breaks down, generating a control instruction according to the relative position relationship to control the opening and closing of the plurality of circuit breakers; and the circuit to be protected is used for receiving and executing the control command, wherein the control command is used for completing the opening and closing control of the plurality of circuit breakers in the circuit to be protected.
According to another aspect of the embodiments of the present application, there is also provided a line protection device, including: the first determining module is used for determining the number of circuit breakers in a line to be protected; the second determining module is used for determining the relative position relationship between the plurality of circuit breakers and the modular multi-level converter MCC when the number of the circuit breakers is multiple, and determining whether a line to be protected has a fault; and the control module is used for controlling the opening and closing of the plurality of circuit breakers according to the relative position relation when the line to be protected breaks down.
According to another aspect of the embodiments of the present application, there is also provided a processor configured to execute a program stored in a memory, where the program executes any one of the line protection methods.
In the embodiment of the application, the mode of controlling the opening and closing of the circuit breaker according to the relative position relationship between the circuit breakers and the MCC is adopted, the relative position relationship between the circuit breakers and the MCC is judged, and then the relative position relationship is sent to the corresponding control instruction according to different relative position relationships, so that the technical effect of controlling the opening and closing of the circuit breakers according to the relative position relationship between the circuit breakers and the MCC is achieved, and the technical problems that the normal working performance of the MCC of the modular multilevel converter caused by unreasonable sequence when the circuit breakers perform closing or opening actions in the related technology is easily interfered and the rejection rate of the MCC is high are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flow diagram of an alternative line protection method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an alternative line protection system according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an alternative line protection device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present application, there is provided a line protection method embodiment, it should be noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a line protection method according to an embodiment of the present application, as shown in fig. 1, the method includes the following steps:
s102, determining the number of circuit breakers in a line to be protected;
s104, when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and the modular multi-level converter MCC, and determining whether a line to be protected has a fault;
and S106, when the line to be protected has a fault, controlling the opening and closing of the plurality of circuit breakers according to the relative position relation.
According to the line protection method, firstly, the number of circuit breakers in a line to be protected can be determined, then when the number of the circuit breakers is multiple, the relative position relation between the circuit breakers and the modular multilevel converter MCC is determined, whether the line to be protected breaks down or not is determined, and finally, when the line to be protected breaks down, the circuit breakers are controlled to be opened and closed according to the relative position relation, so that the technical effect of controlling the circuit breakers to be opened and closed according to the relative position relation between the circuit breakers and the MCC is achieved, and the technical problems that the normal working performance of the modular multilevel converter MCC is prone to interference and the rejection rate of the modular multilevel converter MCC is high due to the fact that the sequence of the circuit breakers is unreasonable when closing or opening actions are executed in the related technology are solved.
In some optional embodiments of the present application, the relative position relationship between the plurality of circuit breakers and the modular multilevel converter MCC may be determined as follows, specifically: taking the position of the MCC as an origin position, and taking the position relation between a first breaker at a first distance on the same side of the origin position and the origin position as a relative position relation; the position of the MCC is used as an origin position, and the position relationship between the second circuit breaker at the same side of the origin position and the origin position at the second distance is used as a relative position relationship, wherein the first distance is smaller than the second distance, it is easy to notice that the first circuit breaker is a circuit breaker closer to the MCC, the second circuit breaker is a circuit breaker farther from the MCC, for example, the circuit breaker adjacent to the MCC is the first circuit breaker on the left side of the MCC, and the circuit breaker adjacent to the first circuit breaker on the left side of the first circuit breaker is the second circuit breaker.
In some optional embodiments of the present application, the plurality of circuit breakers may be controlled to be opened and closed according to a relative position relationship, specifically: a first control instruction of the first circuit breaker and a second control instruction of the second circuit breaker are determined based on the relative position relationship, where the first control instruction is used to instruct the first circuit breaker to open, and the second control instruction is used to instruct the second circuit breaker to open at an interval of a first predetermined time after the first circuit breaker opens, it should be noted that the first control instruction and the second control instruction may be from a computer device, for example, a master server in a power grid.
In some embodiments of the present application, it may be determined whether a line to be protected has a fault through the following steps, specifically: detecting whether a line section in which a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down or not, wherein the first circuit breaker is a starting point of the line section, and the second circuit breaker is an end point of the line section; and when the line section is detected to have a fault, determining that the line to be protected has the fault.
Specifically, whether a line segment where a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down is detected, and the following steps can be performed: when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the terminal point are positive direction faults, determining that a line segment where the first circuit breaker and the second circuit breaker are located is in fault; and when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point are both in reverse direction faults, determining that no fault occurs in the line segment where the first circuit breaker and the second circuit breaker are located.
In some optional embodiments of the present application, when a line to be protected has a fault, after performing on-off control on a plurality of circuit breakers according to a relative position relationship, it may be detected at predetermined intervals whether the line to be protected is recovered to be normal, and when a first wave head polarity corresponding to a starting point and a second wave head polarity corresponding to an end point are both in a reverse direction fault, it is determined that the line to be protected is recovered to be normal; under the condition that it is determined that the line to be protected returns to normal, a third control instruction of the first circuit breaker and a fourth control instruction of the second circuit breaker are determined based on the relative relationship, where the third control instruction is used to instruct to close the second circuit breaker, and the third control instruction is used to close the first circuit breaker at an interval of a second predetermined time after the second circuit breaker is closed.
It can be understood that when determining whether the line to be protected is faulty, the closed state of the circuit breaker is continuously maintained when the line to be protected is not faulty.
Fig. 2 is a line protection system according to an embodiment of the present application, and as shown in fig. 2, the line protection system includes:
the computer equipment 10 is used for determining the number of circuit breakers in a line to be protected, determining the relative position relationship between a plurality of circuit breakers and the modular multilevel converter MCC when the number of the circuit breakers is multiple, and determining whether the line to be protected has a fault; when a line to be protected breaks down, generating a control instruction according to the relative position relationship to control the opening and closing of the plurality of circuit breakers;
and the line to be protected 20 is configured to receive and execute a control instruction, where the control instruction is used to complete opening and closing control of a plurality of circuit breakers in the line to be protected.
In the line protection system, the computer device 10 is configured to determine the number of circuit breakers in a line to be protected, determine, when the number of the circuit breakers is multiple, a relative position relationship between the multiple circuit breakers and the modular multilevel converter MCC, and determine whether the line to be protected has a fault; when a line to be protected breaks down, generating a control instruction according to the relative position relationship to control the opening and closing of the plurality of circuit breakers; the circuit to be protected 20 is configured to receive and execute a control instruction, where the control instruction is configured to complete switching control of a plurality of circuit breakers in the circuit to be protected, so as to achieve a technical effect of performing switching control on the plurality of circuit breakers according to a relative position relationship between the plurality of circuit breakers and the MCC, and further solve a technical problem that normal working performance of the MCC of the modular multilevel converter is prone to interference and rejection rate of the MCC is high due to an unreasonable sequence of the plurality of circuit breakers during closing or opening operations in the related art.
In some embodiments of the present application, it may be determined whether a line to be protected has a fault through the following steps, specifically: detecting whether a line section in which a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down or not, wherein the first circuit breaker is a starting point of the line section, and the second circuit breaker is an end point of the line section; and when the line section is detected to have a fault, determining that the line to be protected has the fault.
Specifically, whether a line segment where a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down is detected, and the following steps can be performed: when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the terminal point are positive direction faults, determining that a line segment where the first circuit breaker and the second circuit breaker are located is in fault; and when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point are both in reverse direction faults, determining that no fault occurs in the line segment where the first circuit breaker and the second circuit breaker are located.
Fig. 3 is a line protection device according to an embodiment of the present application, and as shown in fig. 3, the line protection device includes:
a first determining module 40, configured to determine the number of circuit breakers in a line to be protected;
the second determining module 42 is configured to determine, when the number of the circuit breakers is multiple, a relative position relationship between the multiple circuit breakers and the modular multilevel converter MCC, and determine whether a line to be protected has a fault;
and the control module 44 is used for controlling the opening and closing of the plurality of circuit breakers according to the relative position relationship when the line to be protected has a fault.
In the line protection device, a first determining module 40 is used for determining the number of circuit breakers in a line to be protected; the second determining module 42 is configured to determine, when the number of the circuit breakers is multiple, a relative position relationship between the multiple circuit breakers and the modular multilevel converter MCC, and determine whether a line to be protected has a fault; the control module 44 is configured to perform switching control on the plurality of circuit breakers according to the relative position relationship when a line to be protected breaks down, so as to achieve a technical effect of performing switching control on the plurality of circuit breakers according to the relative position relationship between the plurality of circuit breakers and the MCC, and further solve a technical problem that normal working performance of the MCC of the modular multilevel converter is prone to interference and the rejection rate of the MCC is high due to unreasonable sequence of the plurality of circuit breakers during closing or opening actions in the related art.
In some embodiments of the present application, it may be determined whether a line to be protected has a fault through the following steps, specifically: detecting whether a line section in which a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down or not, wherein the first circuit breaker is a starting point of the line section, and the second circuit breaker is an end point of the line section; and when the line section is detected to have a fault, determining that the line to be protected has the fault.
Specifically, whether a line segment where a first circuit breaker and a second circuit breaker are located in a line to be protected breaks down is detected, and the following steps can be performed: when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the terminal point are positive direction faults, determining that a line segment where the first circuit breaker and the second circuit breaker are located is in fault; and when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point are both in reverse direction faults, determining that no fault occurs in the line segment where the first circuit breaker and the second circuit breaker are located.
According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, where the non-volatile storage medium includes a stored program, and when the program runs, the device in which the non-volatile storage medium is located is controlled to execute any one of the line protection methods.
Specifically, the storage medium is used for storing program instructions for executing the following functions, and the following functions are realized:
determining the number of circuit breakers in a line to be protected; when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and the modular multilevel converter MCC, and determining whether a line to be protected has a fault; and when the line to be protected has a fault, the plurality of circuit breakers are controlled to be opened and closed according to the relative position relation.
According to another aspect of the embodiments of the present application, there is also provided a processor configured to execute a program stored in a memory, where the program executes any one of the line protection methods.
Specifically, the processor is configured to call a program instruction in the memory, and implement the following functions:
determining the number of circuit breakers in a line to be protected; when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and the modular multilevel converter MCC, and determining whether a line to be protected has a fault; and when the line to be protected has a fault, the plurality of circuit breakers are controlled to be opened and closed according to the relative position relation.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.
Claims (10)
1. A line protection method, comprising:
determining the number of circuit breakers in a line to be protected;
when the number of the circuit breakers is multiple, determining the relative position relation between the multiple circuit breakers and a modular multi-level converter MCC, and determining whether the line to be protected has a fault;
and when the line to be protected has a fault, carrying out opening and closing control on the plurality of circuit breakers according to the relative position relation.
2. The method of claim 1, wherein determining the relative position relationship between the plurality of circuit breakers and modular multilevel converter MCCs comprises:
taking the position of the MCC as an origin position, and taking the position relation between a first breaker at a first distance on the same side of the origin position and the origin position as the relative position relation;
and taking the position of the MCC as an origin position, and taking the position relation between a second breaker at a second distance on the same side of the origin position and the origin position as the relative position relation, wherein the first distance is smaller than the second distance.
3. The method according to claim 2, wherein controlling the plurality of circuit breakers to open and close according to the relative positional relationship comprises:
and determining a first control instruction of the first circuit breaker and a second control instruction of the second circuit breaker based on the relative position relationship, wherein the first control instruction is used for indicating the first circuit breaker to be disconnected, and the second control instruction is used for indicating the second circuit breaker to be disconnected at intervals of a first preset time after the first circuit breaker is disconnected.
4. The method of claim 2, wherein determining whether the line to be protected is faulty comprises:
detecting whether a line segment where the first circuit breaker and the second circuit breaker are located in the line to be protected has a fault, wherein the first circuit breaker is a starting point of the line segment, and the second circuit breaker is an end point of the line segment;
and when the line section is detected to have a fault, determining that the line to be protected has the fault.
5. The method according to claim 4, wherein detecting whether a line segment of the line to be protected, in which the first circuit breaker and the second circuit breaker are located, has a fault comprises:
when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the terminal point are positive direction faults, determining that the line section where the first circuit breaker and the second circuit breaker are located has faults;
and when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point both have faults in opposite directions, determining that the line section where the first circuit breaker and the second circuit breaker are located has no fault.
6. The method according to claim 5, wherein when the line to be protected has a fault, after the plurality of circuit breakers are controlled to be opened and closed according to the relative position relationship, the method comprises the following steps:
detecting whether the line to be protected is recovered to be normal or not, and determining that the line to be protected is recovered to be normal when the first wave head polarity corresponding to the starting point and the second wave head polarity corresponding to the end point both have reverse direction faults;
and under the condition that the line to be protected is determined to be normal, determining a third control instruction of the first circuit breaker and a fourth control instruction of the second circuit breaker based on the relative relation, wherein the third control instruction is used for indicating to close the second circuit breaker, and the third control instruction is used for closing the first circuit breaker at an interval of a second preset time after the second circuit breaker is closed.
7. The method of claim 1, wherein determining whether the line to be protected is faulty further comprises:
and when the line to be protected has no fault, the closed state of the circuit breaker is continuously maintained.
8. A line protection system, comprising:
the computer equipment is used for determining the number of circuit breakers in a line to be protected, determining the relative position relationship between the plurality of circuit breakers and the modular multi-level converter MCC when the number of the circuit breakers is multiple, and determining whether the line to be protected has a fault; when the line to be protected breaks down, generating a control instruction according to the relative position relation to control the opening and closing of the plurality of circuit breakers;
and the line to be protected is used for receiving and executing the control instruction, wherein the control instruction is used for completing the opening and closing control of a plurality of circuit breakers in the line to be protected.
9. A line protection device, comprising:
the first determining module is used for determining the number of circuit breakers in a line to be protected;
the second determining module is used for determining the relative position relationship between the plurality of circuit breakers and the modular multi-level converter MCC when the number of the circuit breakers is multiple, and determining whether the line to be protected has a fault;
and the control module is used for controlling the opening and closing of the plurality of circuit breakers according to the relative position relation when the line to be protected breaks down.
10. A processor configured to execute a program stored in a memory, wherein the program is configured to execute the line protection method according to any one of claims 1 to 7 when executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280590.XA CN112448374A (en) | 2020-11-16 | 2020-11-16 | Line protection method, system and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011280590.XA CN112448374A (en) | 2020-11-16 | 2020-11-16 | Line protection method, system and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112448374A true CN112448374A (en) | 2021-03-05 |
Family
ID=74738384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011280590.XA Pending CN112448374A (en) | 2020-11-16 | 2020-11-16 | Line protection method, system and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112448374A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936120A (en) * | 2015-12-30 | 2017-07-07 | 国网智能电网研究院 | A kind of direct current network line fault protection method |
| CN107147089A (en) * | 2017-05-27 | 2017-09-08 | 天津大学 | A kind of super high voltage direct current electricity transmission system failure guard method |
| CN109088403A (en) * | 2018-08-29 | 2018-12-25 | 许继集团有限公司 | Half wavelength line fault detection method, guard method and corresponding intrument |
| CN111817268A (en) * | 2020-06-17 | 2020-10-23 | 清华大学 | Fault processing method, fault processing device and direct current transmission system |
-
2020
- 2020-11-16 CN CN202011280590.XA patent/CN112448374A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106936120A (en) * | 2015-12-30 | 2017-07-07 | 国网智能电网研究院 | A kind of direct current network line fault protection method |
| CN107147089A (en) * | 2017-05-27 | 2017-09-08 | 天津大学 | A kind of super high voltage direct current electricity transmission system failure guard method |
| CN109088403A (en) * | 2018-08-29 | 2018-12-25 | 许继集团有限公司 | Half wavelength line fault detection method, guard method and corresponding intrument |
| CN111817268A (en) * | 2020-06-17 | 2020-10-23 | 清华大学 | Fault processing method, fault processing device and direct current transmission system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160254666A1 (en) | Adaptive microgrid control | |
| CN103814501A (en) | Diagnosis for GOOSE communication | |
| CN108319256A (en) | Controller redundancy switching method, device, computer equipment and storage medium | |
| CN110427003A (en) | Robot control method and device and robot | |
| CN114298859A (en) | Topology analysis method and device, storage medium and processor | |
| CN106532692B (en) | A kind of static security analysis method and device of area power grid meter and prepared auto restart | |
| CN112054490B (en) | Method and device for exiting third station fault in multi-terminal direct-current single-pole metal operation mode | |
| CN112202153B (en) | Locking control method, device, terminal and medium for multi-terminal direct current transmission system | |
| CN112448374A (en) | Line protection method, system and device | |
| CN109687399A (en) | Inverter overcurrent protection control method, device and terminal device | |
| Satuyeva et al. | Q-learning based protection scheme for microgrid using multi-agent system | |
| CN111969568A (en) | Method, system and storage medium for fault location, isolation and self-healing of direct-current power distribution network | |
| CN114336545B (en) | Distributed protection method with adaptive communication rate capability and computer readable storage medium | |
| Hasan et al. | A simulation testbed for cascade analysis | |
| CN109521332A (en) | Fault handling method, apparatus and system | |
| CN115377973A (en) | Transformer substation operation control method and device, storage medium and electronic equipment | |
| CN105097356A (en) | Control method and device | |
| CN108736455A (en) | Protection simulation method and system | |
| CN105207182A (en) | Method and system for protecting power distribution network area | |
| CN103855691A (en) | Method, device and system for fault diagnosis of transformer substation | |
| CN113809738A (en) | Distribution network fault self-healing method and device based on main station and terminal protection cooperation | |
| CN111751654A (en) | Power system fault processing method and device, computer equipment and medium | |
| CN106410768B (en) | A method of control high voltage DC breaker | |
| CN113678375A (en) | Solid-state circuit breaker, method for operating the same, and control device for solid-state circuit breaker | |
| CN214252555U (en) | Anti-ground fault detection circuit and detection equipment |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210305 |