CN110265978B - Fault removal method, device and equipment for coping with station communication power supply voltage loss - Google Patents
Fault removal method, device and equipment for coping with station communication power supply voltage loss Download PDFInfo
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- CN110265978B CN110265978B CN201910562815.1A CN201910562815A CN110265978B CN 110265978 B CN110265978 B CN 110265978B CN 201910562815 A CN201910562815 A CN 201910562815A CN 110265978 B CN110265978 B CN 110265978B
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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
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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Abstract
The invention discloses a fault removal method for coping with the voltage loss of a communication power supply for a station, which comprises the following steps: when a fault is detected in the power system and a substation with the station communication power supply voltage loss exists in a line where the fault is located, determining the substation generating the station communication power supply voltage loss as a target substation; protecting the target transformer substation by using the on-ground layer protection configuration or the station domain layer protection configuration; and protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using the wide area layer protection configuration so as to remove the fault. By applying the technical scheme provided by the embodiment of the invention, the efficiency of fault removal is greatly improved, and the reliability of fault removal is improved. The invention also discloses a fault removing device, equipment and a storage medium for coping with the station communication power supply voltage loss, and the fault removing device, the equipment and the storage medium have corresponding technical effects.
Description
Technical Field
The invention relates to the technical field of substation protection, in particular to a fault removal method, a fault removal device, fault removal equipment and a computer readable storage medium for dealing with the voltage loss of a communication power supply for a substation.
Background
After a communication power supply of a transformer substation is in voltage loss, the communication with an adjacent transformer substation cannot be carried out, full-line quick-acting protection based on double-end quantity information such as optical difference protection and pilot protection of the transformer substation and the adjacent transformer substation is possibly influenced, so that the protection cannot work normally, and the risk that faults cannot be removed for a long time exists.
In summary, how to effectively solve the problems that after the communication power supply of the transformer substation is under voltage loss, the protection cannot normally act, the risk that the fault cannot be removed for a long time exists, and the like, is a problem that needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a fault removal method for dealing with the voltage loss of a communication power supply for a station, which greatly improves the fault removal efficiency and the fault removal reliability; another object of the present invention is to provide a fault removal apparatus, device, and computer-readable storage medium that cope with a loss of voltage of a communication power supply for a station.
In order to solve the technical problems, the invention provides the following technical scheme:
a fault removal method for coping with the voltage loss of a communication power supply for a station comprises the following steps:
when a fault is detected in an electric power system and a substation with the station communication power supply voltage loss exists in a line where the fault is located, determining the substation with the station communication power supply voltage loss as a target substation;
protecting the target transformer substation by using a ground layer protection configuration or a station domain layer protection configuration;
and protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using wide area layer protection configuration so as to remove the fault.
In an embodiment of the present invention, the protecting the target substation with a local layer protection configuration or a station and domain layer protection configuration includes:
acquiring voltage data and current data of the end where the target transformer substation is located;
judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located; the distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault;
if the distance I section protection criterion of the target transformer substation is met, protecting the target transformer substation by utilizing the distance I section protection pre-input to the target transformer substation;
if the distance I section protection criterion of the target transformer substation is not met, protecting the target transformer substation by using the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation; the station communication power supply voltage loss near backup protection criterion corresponding to the station communication power supply voltage loss near backup protection is set according to a setting principle that each line terminal metallic fault can be set with sensitivity.
In a specific embodiment of the present invention, protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using a wide area layer protection configuration includes:
protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by utilizing wide-area near backup protection; the wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
In a specific embodiment of the present invention, the protecting the substation other than the target substation in the level line where the target substation is located and the adjacent level line by using wide-area near backup protection includes:
respectively acquiring voltage data and current data of the ends of the target transformer substation, except the target transformer substation, in the level line of the target transformer substation and the adjacent level line;
respectively judging whether voltage data and current data of the end where each transformer substation except the target transformer substation is located meet the wide-area near backup protection criterion;
and if the substation meeting the wide area near backup protection criterion exists, timing from the moment when the wide area near backup protection criterion is met, and protecting the substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection within a preset time delay.
A fault removing device for coping with voltage loss of a communication power supply for a station comprises:
the target substation determining module is used for determining a substation generating station communication power source voltage loss as a target substation when a fault is detected in the power system and the substation generating station communication power source voltage loss exists in a line of the level where the fault exists;
the target transformer substation protection module is used for protecting the target transformer substation by using a ground layer protection configuration or a station domain layer protection configuration;
and the fault removing module is used for protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using wide area layer protection configuration so as to remove the fault.
In a specific embodiment of the invention, the target substation protection module comprises a target substation data acquisition submodule, a judgment submodule and a target substation protection submodule,
the target transformer substation data acquisition submodule is used for acquiring voltage data and current data of the end where the target transformer substation is located;
the judgment submodule is used for judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located; the distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault;
the target substation protection submodule is used for protecting the target substation by utilizing the distance I section protection pre-input to the target substation when the distance I section protection criterion of the target substation is met; when the distance I section protection criterion of the target transformer substation is not met, protecting the target transformer substation by using the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation; the station communication power supply voltage loss near backup protection criterion corresponding to the station communication power supply voltage loss near backup protection is set according to a setting principle that each line terminal metallic fault can be set with sensitivity.
In one embodiment of the invention, the fault removal module comprises further substation protection sub-modules,
the other substation protection sub-module is a module for protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by utilizing wide-area near backup protection; the wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
In one embodiment of the invention, the other substation protection submodule comprises other substation data acquisition units, a judgment unit and other substation protection units,
the other transformer substation data acquisition unit is used for respectively acquiring voltage data and current data of the end where the other transformer substations except the target transformer substation are located in the level line where the target transformer substation is located and the adjacent level line;
the judgment unit is used for respectively judging whether voltage data and current data of the end where each transformer substation except the target transformer substation is located meet the wide-area near backup protection criterion;
and the other substation protection units are used for timing from the moment when the wide area near backup protection criterion is met when the substation meeting the wide area near backup protection criterion exists, and protecting the substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection at preset time delay.
A fault clearing apparatus for coping with a loss of voltage of a communication power supply for a station, comprising:
a memory for storing a computer program;
and the processor is used for realizing the steps of the fault removal method for coping with the voltage loss of the communication power supply for the station when executing the computer program.
A computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the fault clearing method for coping with a loss of voltage of a communication power supply for a station as described above.
By the method provided by the embodiment of the invention, the ground layer protection configuration, the station domain layer protection configuration and the wide area layer protection configuration are preset, when the fact that the fault exists in the power system and the substation with the station communication power supply voltage loss exists in the level line of the fault is detected, the substation generating the station communication power supply voltage loss is determined as the target substation, the target substation is protected by the ground layer protection configuration or the station domain layer protection configuration, and the other substations except the target substation in the level line of the target substation and the adjacent level line are protected by the wide area layer protection configuration so as to remove the fault. According to the method, the hierarchical protection method for applying pressure to the communication power supply for the substation is preset, and under the condition that the communication power supply of the substation is under the condition of voltage loss, the protection configurations of all the layers are matched with each other, so that the fault removal efficiency is greatly improved, and the fault removal reliability is improved.
Correspondingly, the embodiment of the invention also provides a device, equipment and a computer readable storage medium for removing the fault of the communication power supply for the coping station, which correspond to the method for removing the fault of the communication power supply for the coping station with the voltage loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an implementation of a fault clearing method for handling a station communication power source voltage loss according to an embodiment of the present invention;
FIG. 2 is a flowchart of another implementation of a fault removal method for handling a voltage loss of a communication power supply for a station according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an electrical system according to an embodiment of the present invention;
fig. 4 is a block diagram of a fault removal apparatus for handling a voltage loss of a communication power supply for a station according to an embodiment of the present invention;
fig. 5 is a block diagram of a fault removal device for handling a voltage loss of a communication power supply for a station according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a flowchart of an implementation of a fault clearing method for handling voltage loss of a communication power supply for a station according to an embodiment of the present invention, where the method may include the following steps:
s101: when the fact that a fault exists in the power system and a substation with the station communication power supply voltage loss exists in a line where the fault exists is detected, the substation with the station communication power supply voltage loss is determined as a target substation.
A fault detection device may be provided in the power system in advance, and when a fault is detected in the power system by the fault detection device and a substation with a station communication power source loss voltage is detected in a line of a level where the fault is located, the substation that generates the station communication power source loss voltage may be determined as a target substation.
S102: and protecting the target transformer substation by using the ground layer protection configuration or the station domain layer protection configuration.
The method comprises the steps that local layer protection configuration or station domain layer protection configuration for protecting a substation with station communication power supply voltage loss in a line with a fault can be preset, and after a target substation with the station communication power supply voltage loss is determined, if the station communication power supply voltage loss is detected and all external communication of the substation is lost, the target substation with the station communication power supply voltage loss is determined, the local layer protection configuration or the station domain layer protection configuration can be used for protecting the target substation. And the in-situ layer protection configuration can be set to be 0 time delay action, and the station domain layer protection configuration is set to be 0.3S for protection action after a target substation is determined and certain time delay is passed, so that the priority of the in-situ layer protection configuration is higher than that of the station domain layer protection configuration, and the power failure range involved in the fault removal process is reduced.
S103: and protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using the wide area layer protection configuration so as to remove the fault.
The wide area layer protection configuration for protecting the target substation in the level line and other substations except the target substation in the adjacent level line can be preset, and the action time delay of the wide area layer protection configuration can be set to be larger than that of the station domain layer protection configuration, so that after protection action is carried out through the station domain layer protection configuration, if the fault of the corresponding line is removed, the wide area layer protection configuration is not required to be used for protection action, and the power failure range related to the fault removal process is further reduced. Through configuring proper protection in the intelligent substation hierarchical protection system and through time sequence cooperation, faults can be quickly and reliably removed under the condition that the communication power supply for the substation is in a voltage loss state.
By the method provided by the embodiment of the invention, the ground layer protection configuration, the station domain layer protection configuration and the wide area layer protection configuration are preset, when the fact that the fault exists in the power system and the substation with the station communication power supply voltage loss exists in the level line of the fault is detected, the substation generating the station communication power supply voltage loss is determined as the target substation, the target substation is protected by the ground layer protection configuration or the station domain layer protection configuration, and the other substations except the target substation in the level line of the target substation and the adjacent level line are protected by the wide area layer protection configuration so as to remove the fault. According to the method, the hierarchical protection method for applying pressure to the communication power supply for the substation is preset, and under the condition that the communication power supply of the substation is under the condition of voltage loss, the protection configurations of all the layers are matched with each other, so that the fault removal efficiency is greatly improved, and the fault removal reliability is improved.
It should be noted that, based on the first embodiment, the embodiment of the present invention further provides a corresponding improvement scheme. In the following embodiments, steps that are the same as or correspond to those in the first embodiment may be referred to each other, and corresponding advantageous effects may also be referred to each other, which are not described in detail in the following modified embodiments.
Example two:
referring to fig. 2, fig. 2 is a flowchart of another implementation of a fault clearing method for handling voltage loss of a communication power supply for a station according to an embodiment of the present invention, where the method may include the following steps:
s201: when the fact that a fault exists in the power system and a substation with the station communication power supply voltage loss exists in a line where the fault exists is detected, the substation with the station communication power supply voltage loss is determined as a target substation.
S202: and acquiring voltage data and current data of the end where the target transformer substation is located.
After the target transformer substation with the communication power supply for the generating station being in voltage loss is determined, voltage data and current data of the end where the target transformer substation is located can be obtained.
S203: and judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located, if so, executing the step S204, and if not, executing the step S205.
The distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault.
The formation protection configuration can be set as a distance I section protection, the distance I section protection criterion can adopt a conventional inter-phase distance protection and grounding distance protection criterion, and taking the inter-phase distance protection as an example, the protection criterion can be set as the following formula:
wherein, UΦΦFor protecting the line voltage measured at the installation, U1ΦΦIs a corresponding positive sequence voltage, ZsetFor setting resistance, Z, calculated according to a setting principleDTo simulate impedance, IΦΦIs line current, θ2Is a phase shift angle;
the phase angle is determined by a directional impedance relay with positive sequence voltage polarization,
the phase angle is determined for a reactance relay, (phi ═ A, B and C) means that phi takes any one of A, B, C three phases.
Setting principles of the distance I section protection criteria can be preset, namely setting is carried out according to measured impedance when each line avoids the tail end of the line and has a short-circuit fault, a corresponding set impedance value is calculated according to the setting principles, the set impedance value is set to be the calculated impedance value, after voltage data and current data of the end where the target transformer substation is located are obtained, whether the distance I section protection criteria of the target transformer substation are met or not can be judged according to the voltage data and the current data of the end where the target transformer substation is located, if yes, step S204 is executed, and if not, step S205 is executed.
S204: and protecting the target transformer substation by utilizing the I-section protection of the distance pre-input to the target transformer substation.
After the obtained voltage data and current data of the end where the target transformer substation is located meet the distance I section protection criterion, the target transformer substation can be protected by utilizing the distance I section protection pre-invested in the target transformer substation.
S205: and protecting the target transformer substation by using the station communication power supply voltage loss near backup protection pre-input to the target transformer substation.
The communication power supply voltage loss near backup protection criterion for the station corresponding to the communication power supply voltage loss near backup protection for the station is set according to a setting principle that the metallic fault at the tail end of each line can be set with sensitivity.
The station domain layer protection configuration can be set as the communication power supply voltage loss near backup protection for the station, the communication power supply voltage loss near backup protection criterion for the station can also adopt the conventional interphase distance protection and grounding distance protection criterion, but the setting principle of the communication power supply voltage loss near backup protection criterion for the station is to set according to the setting principle that the terminal metallic fault of each line can be set with sensitivity, the corresponding set impedance value is calculated according to the setting principle, and the set impedance is set as the calculated impedance value. After the obtained voltage data and current data of the end where the target transformer substation is located are determined not to meet the distance I section protection criterion, the target transformer substation can be protected by means of the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation.
S206: and respectively acquiring voltage data and current data of the ends of other substations except the target substation in the level line where the target substation is located and the adjacent level line.
After the target transformer substation with the communication power supply for the generating station being in voltage loss is determined, voltage data and current data of the end where other transformer substations except the target transformer substation are located in the level line where the target transformer substation is located and the adjacent level line can be obtained respectively.
The default delay is mostly set to be slightly longer than the delay of the in-place layer protection configuration and the station domain layer protection configuration, for example, it can be set to 0.7S. By setting the time delay of the wide area layer protection configuration action to be larger than the time delay of the station domain layer protection configuration action, after the protection action is carried out on the stratum protection configuration or the station domain layer protection configuration, if the fault of the corresponding line is removed, the protection action is not required to be carried out again by using the wide area layer protection configuration, the power failure range related to the fault removal process is further reduced, and the protection reliability is improved.
S207: and respectively judging whether the voltage data and the current data of the end where each transformer substation except the target transformer substation is located meet the wide-area near backup protection criterion, if so, executing the step S208, otherwise, not processing.
After voltage data and current data of the ends of other substations except the target substation in the stage line where the target substation is located and the adjacent stage line are obtained, whether the voltage data and the current of the ends of the substations except the target substation meet wide-area near backup protection criteria or not can be respectively judged, the wide-area near backup protection criteria can also adopt conventional interphase distance protection and grounding distance protection criteria, the setting principle of the wide-area near backup protection criteria is also setting according to the setting principle that the terminal metallic fault of each line can be set sensitively, a corresponding setting impedance value is calculated according to the setting principle, and the setting impedance is set to the calculated impedance value. If yes, go to step S208, otherwise do not.
S208: and timing from the moment when the wide area near backup protection criterion is met, and protecting the transformer substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection within a preset time delay.
The wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
The time delay of the wide area layer protection configuration action can be preset, and when the fact that data meeting the wide area near backup protection criterion exist in the obtained voltage data and current data is determined, timing can be conducted from the moment meeting the wide area near backup protection criterion, and the substation meeting the wide area near backup protection criterion is protected through the wide area near backup protection at the preset time delay.
In a specific example application, referring to fig. 3, fig. 3 is a schematic diagram of an electrical power system in an embodiment of the present invention, assuming that a substation B is subjected to dc voltage loss, a fault F1 is located within a protection range of the substation B from the i-section, and a fault C is located outside the protection range of the substation C from the i-section; the fault F2 is located outside the protection range of the transformer substation B from the section I, and the fault F2 is located inside the protection range of the transformer substation C from the section I; and setting the wide area near backup protection according to the sensitivity of the metallic fault at the tail end of the line, presetting the action of 0 time delay of the I section protection, 0.3S time delay of the station communication power supply voltage loss near backup protection and 0.7S time delay of the wide area near backup protection. The following describes the fault removal process after the faults occur at F1 and F2 respectively and the hierarchical protection method for dealing with the station communication power supply voltage loss provided by the embodiment of the present invention is adopted.
1. Failure at F1
(1) Since the F1 is located in the protection range of the distance I section from the transformer substation B, the distance I section from the transformer substation B performs protection action, and a tripping instruction is immediately sent to the breaker D3 without delay;
(2) since the F1 is located outside the protection range of the distance I section of the transformer substation C, the distance I section of the transformer substation C does not act in protection;
(3) the substation C detects that the communication with the substation B is lost, wide-area near backup protection is put into use, and meanwhile, due to the fact that distance protection criteria of the wide-area near backup protection still have sensitivity when the F1 fails, the wide-area near backup protection sends a tripping instruction to the breaker D4 after 0.7s of delay action;
(4) and completing fault removal.
Note that for substation a and substation D, both substations will also be put into wide area near backup protection due to the detection of a loss of communication with substation B. Because the wide-area near backup protection is set according to the sensitivity of the metallic fault at the end of the line, the actual protection range of the wide-area near backup protection is extended to the next-stage line. Therefore, when the fault is at the position F1, the wide-area near-backup protection criterion of the substation a and the substation D may be satisfied, so that the breakers D5 and D1 trip after 0.7s of delay, and the protection action exceeds. However, in the process of waiting for 0.7s of delay, the distance I section protection of the substation B is already operated, the circuit breaker D3 is tripped without delay, and the wide-area near backup protection criteria of the substation A and the substation D are not met any more. Therefore, by means of time sequence matching, the hierarchical protection method for coping with the station communication power voltage loss provided by the embodiment of the invention cannot cause protection overtaking.
2. Failure at F2
(1) Since the F2 is located outside the protection range of the distance I section of the transformer substation B, the distance I section of the transformer substation B does not act in protection;
(2) the substation communication power supply voltage loss near backup protection method comprises the steps that due to the fact that a substation B communication power supply voltage loss exists, all external communication of the substation is lost, the substation communication power supply voltage loss near backup protection is thrown into the substation, and meanwhile due to the fact that distance protection criteria of the substation communication power supply voltage loss near backup protection still have sensitivity when a fault occurs at F2, the substation communication power supply voltage loss near backup protection sends a tripping instruction to a breaker D3 through 0.3s delay action;
(3) since the F2 is located in the protection range of the distance I section from the transformer substation C, the distance I section from the transformer substation C performs protection action, and a tripping instruction is immediately sent to the breaker D4 without delay;
(4) and completing fault removal.
Note that for substation a and substation D, both substations will also be put into wide area near backup protection due to the detection of a loss of communication with substation B. Because the wide-area near backup protection is set according to the sensitivity of the metallic fault at the end of the line, the actual protection range of the wide-area near backup protection is extended to the next-stage line. Therefore, when the fault is at the position F2, the wide-area near-backup protection criterion of the substation a and the substation D may be satisfied, so that the breakers D5 and D1 trip after 0.7s of delay, and the protection action exceeds. However, in the process of waiting for 0.7s of delay, the station communication power supply for the substation B is subjected to voltage loss near backup protection, and the wide area near backup protection criteria of the substation A and the substation D are not met any more by tripping the breaker D3 after 0.3s of delay. Therefore, by means of time sequence matching, the hierarchical protection method for coping with the station communication power voltage loss provided by the embodiment of the invention cannot cause protection overtaking.
Corresponding to the above method embodiment, the embodiment of the present invention further provides a fault removing device for coping with the station communication power supply voltage loss, and the fault removing device for coping with the station communication power supply voltage loss described below and the fault removing method for coping with the station communication power supply voltage loss described above may be referred to correspondingly.
Referring to fig. 4, fig. 4 is a block diagram illustrating a fault removal apparatus for handling a communication power loss of a station according to an embodiment of the present invention, where the apparatus may include:
the target substation determining module 41 is configured to determine, as a target substation, a substation generating station communication power source voltage loss when a fault is detected in the power system and a substation generating station communication power source voltage loss exists in a line where the fault is located;
the target substation protection module 42 is configured to protect the target substation with the ground protection configuration or the substation area layer protection configuration;
and the fault removing module 43 is configured to protect the substation where the target substation is located and other substations except the target substation in the adjacent-level line by using the wide-area-layer protection configuration, so as to remove the fault.
By means of the device, the ground layer protection configuration, the station domain layer protection configuration and the wide area layer protection configuration are preset, when the fact that the fault exists in the power system and the substation with the station communication power source voltage loss exists in the level line of the fault is detected, the substation with the station communication power source voltage loss is determined as the target substation, the target substation is protected through the ground layer protection configuration or the station domain layer protection configuration, and other substations except the target substation in the level line of the target substation and the adjacent level line are protected through the wide area layer protection configuration, so that the fault is removed. According to the method, the hierarchical protection method for applying pressure to the communication power supply for the substation is preset, and under the condition that the communication power supply of the substation is under the condition of voltage loss, the protection configurations of all the layers are matched with each other, so that the fault removal efficiency is greatly improved, and the fault removal reliability is improved.
In one embodiment of the present invention, the target substation protection module 42 includes a target substation data acquisition submodule, a judgment submodule, and a target substation protection submodule,
the target transformer substation data acquisition submodule is used for acquiring voltage data and current data of the end where the target transformer substation is located;
the judgment submodule is used for judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located; the distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault to perform setting;
the target substation protection submodule is used for protecting the target substation by utilizing the distance I section protection pre-input to the target substation when the distance I section protection criterion of the target substation is met; when the distance I section protection criterion of the target transformer substation is not met, protecting the target transformer substation by using the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation; the communication power supply voltage loss near backup protection criterion for the station corresponding to the communication power supply voltage loss near backup protection for the station is set according to a setting principle that the metallic fault at the tail end of each line can be set with sensitivity.
In one embodiment of the invention, the fault removal module 43 comprises further substation protection sub-modules,
the other substation protection sub-module is a module for protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by utilizing wide-area near backup protection; the wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
In one embodiment of the invention, the other substation protection submodule comprises other substation data acquisition units, a judgment unit and other substation protection units,
the other transformer substation data acquisition unit is used for respectively acquiring voltage data and current data of the end where other transformer substations except the target transformer substation are located in the level line where the target transformer substation is located and the adjacent level line;
the judging unit is used for respectively judging whether voltage data and current data of the end where each transformer substation except the target transformer substation is located meet wide-area near backup protection criteria;
and the other substation protection units are used for timing from the moment when the wide area near backup protection criterion is met when the substation meeting the wide area near backup protection criterion exists, and protecting the substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection at preset time delay.
In correspondence to the above method embodiment, referring to fig. 5, fig. 5 is a schematic diagram of a fault removal device for coping with voltage loss of a communication power supply for a station according to the present invention, where the device may include:
a memory 51 for storing a computer program;
the processor 52, when executing the computer program stored in the memory 51, may implement the following steps:
when a fault is detected in the power system and a substation with the station communication power supply voltage loss exists in a line where the fault is located, determining the substation generating the station communication power supply voltage loss as a target substation; protecting the target transformer substation by using the on-ground layer protection configuration or the station domain layer protection configuration; and protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using the wide area layer protection configuration so as to remove the fault.
For the introduction of the device provided by the present invention, please refer to the above method embodiment, which is not described herein again.
Corresponding to the above method embodiment, the present invention further provides a computer-readable storage medium having a computer program stored thereon, the computer program, when executed by a processor, implementing the steps of:
when a fault is detected in the power system and a substation with the station communication power supply voltage loss exists in a line where the fault is located, determining the substation generating the station communication power supply voltage loss as a target substation; protecting the target transformer substation by using the on-ground layer protection configuration or the station domain layer protection configuration; and protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using the wide area layer protection configuration so as to remove the fault.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
For the introduction of the computer-readable storage medium provided by the present invention, please refer to the above method embodiments, which are not described herein again.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device, the apparatus and the computer-readable storage medium disclosed in the embodiments correspond to the method disclosed in the embodiments, so that the description is simple, and the relevant points can be referred to the description of the method.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A fault removal method for dealing with voltage loss of a communication power supply for a station is characterized by comprising the following steps:
when a fault is detected in an electric power system and a substation with the station communication power supply voltage loss exists in a line where the fault is located, determining the substation with the station communication power supply voltage loss as a target substation;
protecting the target transformer substation by using a ground layer protection configuration or a station domain layer protection configuration;
protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using wide area layer protection configuration so as to remove the fault;
the protecting the target substation by using the stratum protection configuration or the station area layer protection configuration comprises the following steps:
acquiring voltage data and current data of the end where the target transformer substation is located;
judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located; the distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault;
if the distance I section protection criterion of the target transformer substation is met, protecting the target transformer substation by utilizing the distance I section protection pre-input to the target transformer substation;
if the distance I section protection criterion of the target transformer substation is not met, protecting the target transformer substation by using the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation; the station communication power supply voltage loss near backup protection criterion corresponding to the station communication power supply voltage loss near backup protection is set according to a setting principle that each line terminal metallic fault can be set with sensitivity.
2. The method for removing the fault of the station communication power supply voltage loss according to claim 1, wherein the protection of the substation except the target substation in the level line where the target substation is located and the adjacent level line by using the wide area layer protection configuration comprises:
protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by utilizing wide-area near backup protection; the wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
3. The method for removing the fault in response to the voltage loss of the station communication power supply according to claim 2, wherein the protection of the substation except the target substation in the level line where the target substation is located and the adjacent level line by using wide-area near backup protection comprises:
respectively acquiring voltage data and current data of the ends of the target transformer substation, except the target transformer substation, in the level line of the target transformer substation and the adjacent level line;
respectively judging whether voltage data and current data of the end where each transformer substation except the target transformer substation is located meet the wide-area near backup protection criterion;
and if the substation meeting the wide area near backup protection criterion exists, timing from the moment when the wide area near backup protection criterion is met, and protecting the substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection within a preset time delay.
4. A failure removing device for coping with voltage loss of a communication power supply for a station, comprising:
the target substation determining module is used for determining a substation generating station communication power source voltage loss as a target substation when a fault is detected in the power system and the substation generating station communication power source voltage loss exists in a line of the level where the fault exists;
the target transformer substation protection module is used for protecting the target transformer substation by using a ground layer protection configuration or a station domain layer protection configuration;
the fault removal module is used for protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by using wide area layer protection configuration so as to remove the fault;
the target transformer substation protection module comprises a target transformer substation data acquisition submodule, a judgment submodule and a target transformer substation protection submodule,
the target transformer substation data acquisition submodule is used for acquiring voltage data and current data of the end where the target transformer substation is located;
the judgment submodule is used for judging whether the distance I section protection criterion of the target transformer substation is met or not according to the voltage data and the current data of the end where the target transformer substation is located; the distance I section protection criterion is set according to a setting principle that each line avoids the measured impedance when the tail end of the line has a short-circuit fault;
the target substation protection submodule is used for protecting the target substation by utilizing the distance I section protection pre-input to the target substation when the distance I section protection criterion of the target substation is met; when the distance I section protection criterion of the target transformer substation is not met, protecting the target transformer substation by using the substation communication power supply voltage loss near backup protection pre-input to the target transformer substation; the station communication power supply voltage loss near backup protection criterion corresponding to the station communication power supply voltage loss near backup protection is set according to a setting principle that each line terminal metallic fault can be set with sensitivity.
5. The fault removal device for dealing with the voltage loss of the communication power supply for the station according to claim 4, wherein the fault removal module comprises other substation protection sub-modules,
the other substation protection sub-module is a module for protecting other substations except the target substation in the level line where the target substation is located and the adjacent level line by utilizing wide-area near backup protection; the wide area near backup protection criterion corresponding to the wide area near backup protection is set according to a setting principle that the terminal metallic fault energy of each line has sensitivity.
6. The fault removal device for dealing with the voltage loss of the station communication power supply according to claim 5, wherein the other substation protection submodule comprises an other substation data acquisition unit, a judgment unit and an other substation protection unit,
the other transformer substation data acquisition unit is used for respectively acquiring voltage data and current data of the end where the other transformer substations except the target transformer substation are located in the level line where the target transformer substation is located and the adjacent level line;
the judgment unit is used for respectively judging whether voltage data and current data of the end where each transformer substation except the target transformer substation is located meet the wide-area near backup protection criterion;
and the other substation protection units are used for timing from the moment when the wide area near backup protection criterion is met when the substation meeting the wide area near backup protection criterion exists, and protecting the substation meeting the wide area near backup protection criterion by utilizing the wide area near backup protection at preset time delay.
7. A fault removing apparatus for coping with a loss of voltage of a communication power supply for a station, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of fault clearing for station communication power supply voltage loss according to any one of claims 1 to 3 when executing the computer program.
8. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps of the method of fault clearing against station communication power supply voltage loss as claimed in any one of claims 1 to 3.
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| CN113067314B (en) * | 2021-05-17 | 2023-04-07 | 广东电网有限责任公司 | Substation area protection method and device for coping with voltage loss of direct-current power supply for substation |
| CN113241742B (en) * | 2021-05-26 | 2023-01-20 | 广东电网有限责任公司 | Intelligent substation fault removal method and device |
| CN114336537A (en) * | 2021-12-10 | 2022-04-12 | 广东电网有限责任公司 | Station domain protection method and device based on channel alarm information |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852405A (en) * | 2015-06-02 | 2015-08-19 | 广西电网有限责任公司 | Small hydropower station protection control system based on wide-area data sharing |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101285065B1 (en) * | 2011-08-26 | 2013-07-10 | 한국전력공사 | System and method for managing a distribution system |
| CN202735422U (en) * | 2012-06-05 | 2013-02-13 | 广东电网公司电力科学研究院 | Alternating current/direct current integrated power source system on-line early warning system used for substation |
| CN104078946B (en) * | 2013-10-30 | 2015-08-05 | 中国南方电网有限责任公司 | A kind of wide area distance protecting method towards transformer station |
| CN104144079B (en) * | 2014-07-17 | 2017-11-21 | 国家电网公司 | monitoring method and device for communication power supply |
| CN104578419B (en) * | 2015-01-07 | 2017-07-18 | 山东鲁能智能技术有限公司 | A kind of transformer substation communication power supply monitoring system and method |
| CN105048420A (en) * | 2015-08-28 | 2015-11-11 | 南京南瑞继保电气有限公司 | Secondary direct current power failure protection method for substation |
| CN105871064A (en) * | 2016-04-29 | 2016-08-17 | 华北电力大学 | Station territory and wide territory integrated protection structure mode system and method thereof |
| CN106159915B (en) * | 2016-08-03 | 2018-06-12 | 华北电力大学 | A kind of wide area protection fault location system and its method |
| CN106231274A (en) * | 2016-09-23 | 2016-12-14 | 国网上海市电力公司 | Electric power website communication power supply monitoring system based on ARM and monitoring method |
| US11011906B2 (en) * | 2017-10-20 | 2021-05-18 | Illinois Tool Works | Method and apparatus for adaptive AC/DC surge protection |
| CN109888728B (en) * | 2018-04-28 | 2020-09-25 | 广东电网有限责任公司 | Hierarchical protection method |
-
2019
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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