CN113809828B - Control method and device for grounding disconnecting link - Google Patents
Control method and device for grounding disconnecting link Download PDFInfo
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- CN113809828B CN113809828B CN202111066884.7A CN202111066884A CN113809828B CN 113809828 B CN113809828 B CN 113809828B CN 202111066884 A CN202111066884 A CN 202111066884A CN 113809828 B CN113809828 B CN 113809828B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The embodiment of the invention discloses a control method and a control device for a grounding disconnecting link. The control method of the grounding disconnecting link comprises the following steps: acquiring the voltage of a circuit detected by a voltage transformer and a first voltage state of the circuit detected by a high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is positioned; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; and controlling the grounding switch according to the actual voltage state of the line. The control method and the device for the grounding switch can improve the control reliability.
Description
Technical Field
The embodiment of the invention relates to a switch control technology, in particular to a control method and device of a grounding disconnecting link.
Background
With the development of intelligent substations and the continuous deepening of unattended substations, popularization and application research works for remote operation of relay protection devices and scheduling ends (a scheduling master station, a monitoring background and the like) of primary equipment (switches and isolation disconnecting links) are developed at home and abroad. The remote control operation of a primary equipment remote control switch, an isolation disconnecting link, a remote soft pressing plate of a relay protection device, a control word (namely switching on and off reclosing) and the like is mainly carried out. Remote control of the grounding disconnecting link of the primary equipment of the transformer substation is required to ensure the reliability of control.
At present, the existing control method of the grounding disconnecting link generally needs manual assistance when the grounding disconnecting link is controlled, operators are required to arrive at the site in time, whether a power failure line is electrified or not is checked, whether the line and equipment in the line are powered off or not is confirmed through an electroscope, the operators can only be connected with the grounding disconnecting link, the problems of low working efficiency and low safety exist, and the control reliability is affected.
Disclosure of Invention
The embodiment of the invention provides a control method and a control device for a grounding disconnecting link, which are used for improving the reliability of control.
In a first aspect, an embodiment of the present invention provides a control method for a grounding switch, including:
acquiring the voltage of a circuit detected by a voltage transformer and a first voltage state of the circuit detected by a high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is positioned;
determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer;
determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line;
and controlling the grounding switch according to the actual voltage state of the line.
Optionally, determining the second voltage state of the line according to the voltage of the line detected by the voltage transformer includes:
when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value, determining that a second voltage state of the line is a non-voltage state;
and when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value, determining that the second voltage state of the line is a voltage state.
Optionally, determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line includes:
when the first voltage state of the circuit and the second voltage state of the circuit are both in the non-voltage state, determining that the circuit is in the non-voltage state;
and when the first voltage state of the line and/or the second voltage state of the line are/is a voltage state, determining that the line is in the voltage state.
Optionally, controlling the grounding switch according to an actual voltage state of the line includes:
when the line is in a non-voltage state, the grounding disconnecting link is controlled to conduct switching-on operation.
Optionally, after determining the second voltage state of the line, the method includes:
detecting the high-voltage electroscope according to the first voltage state of the circuit and the second voltage state of the circuit to obtain a detection result;
and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Optionally, detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line to obtain a detection result, including:
performing logic AND and inversion on the first voltage state of the circuit and the second voltage state of the circuit, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1;
logically AND the first voltage state of the circuit and the second voltage state of the circuit to obtain a second output result;
and performing logic AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Optionally, after determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line, the method includes:
verifying the determined actual voltage state of the line;
if the actual voltage states of the lines before and after verification are different, an alarm signal is output and a corresponding alarm prompt is sent out.
In a second aspect, an embodiment of the present invention further provides a control device for a grounding switch, including: the device comprises an input module, a logic judging module, a self-checking module, a power module and an output module, wherein the logic judging module and the self-checking module are electrically connected with the input module, the power module and the output module;
the logic judgment module is used for acquiring a first voltage state of a circuit detected by the voltage transformer and a second voltage state of a circuit detected by the high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is positioned; determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; according to the actual voltage state of the circuit, the grounding disconnecting link in the circuit is controlled to perform switching-off operation or switching-on operation.
Optionally, the self-checking module is configured to perform self-checking on a state of the control device, and when detecting that the state of the control device is abnormal, output an alarm signal and send out a corresponding alarm prompt.
Optionally, the power module is used for supplying power to the logic judging module and the self-checking module, and is also used for detecting the working state of the self-checking module, and sending out an alarm prompt when detecting that the working state of the self-checking module is abnormal.
According to the control method and the control device for the grounding switch, provided by the embodiment of the invention, the voltage of the circuit detected by the voltage transformer and the first voltage state of the circuit detected by the high-voltage electroscope are obtained; the circuit is a circuit where the grounding disconnecting link is positioned; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining the actual voltage state of the circuit according to the first voltage state of the circuit and the second voltage state of the circuit; thereby controlling the grounding switch according to the actual voltage state of the line. According to the control method and the control device for the grounding disconnecting link, which are provided by the embodiment of the invention, the grounding disconnecting link is controlled according to the actual voltage state of the circuit determined by the first voltage state of the circuit and the second voltage state of the circuit, so that the remote control of the grounding disconnecting link can be realized, manual assistance is not needed, and the control reliability can be improved.
Drawings
Fig. 1 is a flowchart of a control method of a grounding switch according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a logic operation of a voltage state according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a self-checking logic operation according to a first embodiment of the present invention;
fig. 4 is a flowchart of a control method of a grounding switch according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a logic operation for detecting a high voltage electroscope according to a second embodiment of the present invention;
fig. 6 is a block diagram of a control device for a grounding switch according to a third embodiment of the present invention;
FIG. 7 is a schematic diagram of a grounding switch and a control device according to a third embodiment of the present invention;
fig. 8 is a schematic diagram of a circuit in which a grounding switch is located according to a third embodiment of the present invention;
fig. 9 is a schematic diagram of a circuit of another grounding switch according to the third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a control method of a grounding switch according to an embodiment of the present invention, where the embodiment is applicable to situations such as remote control of the grounding switch, and the method may be performed by a logic determination module in a control device of the grounding switch, where the device may be implemented by software and/or hardware, and where the device may integrate a control device having a control function of the grounding switch, and the signal compensation method specifically includes the following steps:
Specifically, the first voltage state of the circuit detected by the high-voltage electroscope is a voltage state or a non-voltage state. The control device of the grounding disconnecting link can comprise an input module, wherein the input module is electrically connected with the logic judging module, and the input module is also electrically connected with the voltage transformer and the high-voltage electroscope so as to acquire the voltage and the voltage state of a line where the grounding disconnecting link is positioned through the voltage transformer and the high-voltage electroscope.
Illustratively, the voltage of the line detected by the voltage transformer is lower than 30% of the rated voltage of the line, the second voltage state of the line is determined to be a non-voltage state, the voltage of the line detected by the voltage transformer is higher than 70% of the rated voltage of the line, and the second voltage state of the line is determined to be a voltage state.
Specifically, fig. 2 is a schematic diagram of a logic operation of a voltage state according to a first embodiment of the present invention, referring to fig. 2, a and B respectively represent a first voltage state and a second voltage state, if the inputs a and B are both 1 (0 is voltage, 1 is no voltage), that is, the first voltage state of the line and the second voltage state of the line are both no voltage, the outputs C after the logical and are 1, and it can be determined that the actual voltage state of the line is no voltage.
In addition, after the actual voltage state of the line is determined, the determined actual voltage state of the line may be verified; if the actual voltage states of the lines before and after verification are different, an alarm signal is output and a corresponding alarm prompt is sent out. Fig. 3 is a schematic diagram of a self-checking logic operation according to a first embodiment of the present invention, and referring to fig. 3, a and B respectively represent a first voltage state and a second voltage state, a is 0 or 1, B is 0 or 1 (0 is a voltage, 1 is no voltage), and if the output D is 0, the self-checking logic operation is normal, so as to prevent abnormal operation from affecting the control of the grounding switch.
And 140, controlling the grounding switch according to the actual voltage state of the line.
Specifically, when the actual voltage state of the line is determined to be a non-voltage state, the grounding switch can be controlled to perform switching-on operation so as to realize remote control of the grounding switch.
According to the control method of the grounding disconnecting link, provided by the embodiment of the invention, the voltage of the circuit detected by the voltage transformer and the first voltage state of the circuit detected by the high-voltage electroscope are obtained; the circuit is a circuit where the grounding disconnecting link is positioned; determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer; determining the actual voltage state of the circuit according to the first voltage state of the circuit and the second voltage state of the circuit; thereby controlling the grounding switch according to the actual voltage state of the line. According to the control method of the grounding disconnecting link, which is provided by the embodiment of the invention, the grounding disconnecting link is controlled according to the actual voltage state of the circuit determined by the first voltage state of the circuit and the second voltage state of the circuit, so that the remote control of the grounding disconnecting link can be realized, manual assistance is not needed, and the control reliability can be improved.
Example two
Fig. 4 is a flowchart of a control method of a grounding switch according to a second embodiment of the present invention, where the present embodiment is applicable to situations such as remote control of the grounding switch, and the method may be performed by a logic determination module in a control device of the grounding switch, where the device may be implemented by software and/or hardware, and where the device may integrate a control device having a control function of the grounding switch, and the signal compensation method specifically includes the following steps:
And 220, determining that the second voltage state of the line is a non-voltage state when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value.
The first preset threshold may be 30% of the rated voltage of the line.
Wherein the second preset threshold may be 70% of the nominal voltage of the line.
In addition, the high-voltage electroscope is detected according to the first voltage state of the circuit and the second voltage state of the circuit, and a detection result is obtained; and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Fig. 5 is a schematic diagram of a logic operation for detecting a high-voltage electroscope according to a second embodiment of the present invention, where referring to fig. 5, a and B respectively represent a first voltage state and a second voltage state, the detection of the high-voltage electroscope may specifically be performed by logically and inverting the first voltage state of a line and the second voltage state of the line, and then obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1; logically AND the first voltage state of the circuit and the second voltage state of the circuit to obtain a second output result; and performing logic AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Specifically, when the high-voltage transmission line, namely the line where the grounding disconnecting link is located, runs, A is 0, B is 0, and is 1 after the first logical AND and the inversion, and meanwhile, the high-voltage transmission line is stored for a period of time t (t is preset time, generally 0s < t <600 s) and is 1; when the high-voltage transmission line is in power failure, a period of time T (T < T), A is 1, B is 1, and the output is 1 after the second logic AND; through the first logical AND and the inverse of 1, and the second logical 1, the third logical AND is entered, and the output E is 1, which indicates that the high-voltage electroscope is normal.
Specifically, referring to fig. 2, at least one of a and B is 0, the output C is 0, which indicates that the line is in a pressed state, and the condition of remotely controlling the grounding switch is not provided when the line is in the pressed state.
And 260, when the line is in a non-voltage state, controlling the grounding disconnecting link to perform a closing operation.
Specifically, when the actual voltage state of the line is determined to be a non-voltage state, that is, the first voltage state of the line and the second voltage state of the line are both non-voltage states, the grounding disconnecting link can be controlled to perform a closing operation, so as to realize remote control of the grounding disconnecting link.
According to the control method of the grounding disconnecting link, when the voltage state of the circuit is determined according to the first voltage state of the circuit and the second voltage state of the circuit, the grounding disconnecting link is switched on, so that remote control of the grounding disconnecting link is realized, manual assistance is not needed, and control efficiency and reliability can be improved; and the high-voltage electroscope is detected according to the first voltage state of the circuit and the second voltage state of the circuit so as to prevent the control of the grounding disconnecting link from being influenced by the abnormality of the high-voltage electroscope.
Example III
Fig. 6 is a block diagram of a control device for a grounding switch according to a third embodiment of the present invention, where the control device includes an input module 310, a logic determination module 320, a self-checking module 330, a power module 340, and an output module 350, and the logic determination module 320 and the self-checking module 330 are electrically connected to the input module 310, the power module 340, and the output module 350.
The logic judging module 320 is configured to obtain a first voltage state of a line detected by the voltage transformer and a second voltage state of a line detected by the high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is positioned; determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; according to the actual voltage state of the circuit, the grounding disconnecting link in the circuit is controlled to perform switching-off operation or switching-on operation. The self-checking module 330 is configured to perform self-checking on the state of the control device, and when detecting that the state of the control device is abnormal, output an alarm signal and send out a corresponding alarm prompt. The power module 340 is configured to supply power to the logic determination module and the self-checking module, and is further configured to detect a working state of the self-checking module, and send an alarm prompt when detecting that the working state of the self-checking module is abnormal.
Specifically, the self-checking module 330 may perform self-checking on the state of the control device through self-checking logic as shown in fig. 3. Fig. 7 is a schematic diagram of a circuit of a grounding switch and a control device provided by the third embodiment of the present invention, fig. 8 is a schematic diagram of a circuit of a grounding switch provided by the third embodiment of the present invention, fig. 9 is a schematic diagram of a circuit of another grounding switch provided by the third embodiment of the present invention, and in combination with fig. 7, fig. 8 and fig. 9, an opening/closing coil of the grounding switch is connected to a control power supply, a control device of the grounding switch is electrically connected to an opening/closing coil of the grounding switch, and the control device of the grounding switch can remotely control the grounding switch. The circuit where the grounding switch is located is connected to the bus through a connection. The high-voltage electroscope utilizes the electromagnetic field distribution characteristic, and the sensor is electromagnetically induced in an electric field when the line is pressurized to serve as a sensing principle of the high-voltage electroscope. The high-voltage electroscope converts the electric signal detected by the detector into an optical signal, and the optical signal drives the high-voltage electroscope to judge whether the equipment is electrified or not by utilizing a photoelectric isolation technology.
In one embodiment, the logic determination module 320 includes a first state determination unit and a second state determination unit; the first state determining unit is used for determining that the second voltage state of the line is a non-voltage state when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value; the second state determining unit is used for determining that the second voltage state of the line is a voltage state when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value.
Preferably, the logic judgment module 320 includes a non-pressure state determination unit and a pressure state determination unit; the non-voltage state determining unit is used for determining that the circuit is in a non-voltage state when the first voltage state of the circuit and the second voltage state of the circuit are both in the non-voltage state; the voltage state determining unit is used for determining that the line is in a voltage state when the first voltage state of the line and/or the second voltage state of the line are in the voltage state.
Preferably, the logic judging module 320 includes a closing control unit, where the closing control unit is configured to control the grounding switch to perform a closing operation when the line is in a non-voltage state.
Preferably, the logic judgment module 320 includes a detection unit and a signal generation unit; the detection unit is used for detecting the high-voltage electroscope according to the first voltage state of the circuit and the second voltage state of the circuit and obtaining a detection result; the signal generating unit is used for generating a normal or abnormal signal of the high-voltage electroscope according to the detection result and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
Optionally, the detection unit includes a first operator unit, a second operator unit, and a detection subunit; the first operation subunit is used for logically AND and inverting the first voltage state of the circuit and the second voltage state of the circuit, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1; the second operation subunit is used for carrying out logical AND on the first voltage state of the circuit and the second voltage state of the circuit to obtain a second output result; the detection subunit is used for carrying out logical AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
Preferably, the logic judgment module 320 includes a status verification unit and an alarm prompting unit; the state verification unit is used for verifying the determined actual voltage state of the line; the alarm prompting unit is used for outputting an alarm signal and sending out a corresponding alarm prompt if the actual voltage states of the lines before and after verification are different.
The control device of the grounding switch provided by the embodiment and the control method of the grounding switch provided by any embodiment of the invention belong to the same invention conception, have corresponding beneficial effects, and the detailed technical details of the embodiment are not shown in the control method of the grounding switch provided by any embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (6)
1. The control method of the grounding disconnecting link is characterized by comprising the following steps:
acquiring the voltage of a line detected by a voltage transformer and a first voltage state of the line detected by a high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is located;
determining a second voltage state of the line according to the voltage of the line detected by the voltage transformer;
determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line;
according to the actual voltage state of the circuit, controlling the grounding disconnecting link;
the determining the second voltage state of the line according to the voltage of the line detected by the voltage transformer includes:
when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value, determining that a second voltage state of the line is a non-voltage state;
when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value, determining that a second voltage state of the line is a voltage state;
the determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line includes:
when the first voltage state of the circuit and the second voltage state of the circuit are both in an unpressurized state, determining that the circuit is in an unpressurized state;
when the first voltage state of the circuit and/or the second voltage state of the circuit are/is a voltage state, determining that the circuit is in the voltage state;
the control of the earthing knife-switch according to the actual voltage state of the line comprises:
when the line is in a non-voltage state, the grounding disconnecting link is controlled to perform switching-on operation;
after said determining the second voltage state of the line, comprising:
detecting the high-voltage electroscope according to the first voltage state of the circuit and the second voltage state of the circuit to obtain a detection result;
and generating a normal or abnormal signal of the high-voltage electroscope according to the detection result, and transmitting the normal or abnormal signal of the high-voltage electroscope to a dispatching master station.
2. The method for controlling a grounding switch according to claim 1, wherein the detecting the high-voltage electroscope according to the first voltage state of the line and the second voltage state of the line and obtaining a detection result includes:
performing logical AND and inversion on the first voltage state of the circuit and the second voltage state of the circuit, and obtaining a first output result after a preset time delay; wherein the first voltage state is 0 or 1, and the second voltage state is 0 or 1;
performing logic AND on the first voltage state of the circuit and the second voltage state of the circuit to obtain a second output result;
and carrying out logical AND on the first output result and the second output result to obtain a final output result, and determining whether the detection result of the high-voltage electroscope is normal or abnormal according to the final output result.
3. The method according to claim 1, wherein after determining the actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line, comprising:
verifying the determined actual voltage state of the line;
and if the actual voltage states of the lines are different before and after verification, outputting an alarm signal and sending out a corresponding alarm prompt.
4. A control device for a grounding switch, comprising: the device comprises an input module, a logic judging module, a self-checking module, a power module and an output module, wherein the logic judging module and the self-checking module are electrically connected with the input module, the power module and the output module;
the logic judging module is used for acquiring a first voltage state of a circuit detected by the voltage transformer and a second voltage state of the circuit detected by the high-voltage electroscope; the circuit is a circuit where the grounding disconnecting link is located; determining an actual voltage state of the line according to the first voltage state of the line and the second voltage state of the line; according to the actual voltage state of the line, controlling the grounding disconnecting link in the line to perform switching-off operation or switching-on operation;
the logic judgment module comprises a first state determination unit and a second state determination unit; the first state determining unit is used for determining that a second voltage state of the line is a non-voltage state when the voltage of the line detected by the voltage transformer is lower than a first preset threshold value; the second state determining unit is used for determining that the second voltage state of the line is a voltage state when the voltage of the line detected by the voltage transformer is higher than a second preset threshold value;
the logic judgment module further comprises a non-pressure state determination unit and a pressure state determination unit; the non-voltage state determining unit is used for determining that the circuit is in a non-voltage state when the first voltage state of the circuit and the second voltage state of the circuit are both in the non-voltage state; the voltage state determining unit is used for determining that the circuit is in a voltage state when the first voltage state of the circuit and/or the second voltage state of the circuit are in the voltage state;
the logic judgment module further comprises a closing control unit, wherein the closing control unit is used for controlling the grounding disconnecting link to perform closing operation when the circuit is in a non-voltage state;
the logic judgment module further comprises a detection unit and a signal generation unit; the detection unit is used for detecting the high-voltage electroscope according to the first voltage state of the circuit and the second voltage state of the circuit and obtaining a detection result; the signal generating unit is used for generating a normal or abnormal signal of the high-voltage electroscope according to the detection result and transmitting the normal or abnormal signal of the high-voltage electroscope to the dispatching master station.
5. The control device of the grounding switch according to claim 4, wherein the self-checking module is configured to perform self-checking on a state of the control device, and when detecting that the state of the control device is abnormal, output an alarm signal and send out a corresponding alarm prompt.
6. The control device of the grounding switch according to claim 5, wherein the power module is configured to supply power to the logic judging module and the self-checking module, and is further configured to detect a working state of the self-checking module, and send an alarm prompt when detecting that the working state of the self-checking module is abnormal.
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| CN108376966A (en) * | 2018-03-09 | 2018-08-07 | 中国电力科学研究院有限公司 | Intelligent substation anti-misoperation locking logic interval association relationship analysis method and system |
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| CN112590624A (en) * | 2020-12-24 | 2021-04-02 | 成都汇控科技有限公司 | Automatic grounding device for 27.5kV contact network of electrified railway and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3907998B2 (en) * | 2001-02-09 | 2007-04-18 | 株式会社東芝 | Substation protection control system |
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| CN108376966A (en) * | 2018-03-09 | 2018-08-07 | 中国电力科学研究院有限公司 | Intelligent substation anti-misoperation locking logic interval association relationship analysis method and system |
| CN208621684U (en) * | 2018-07-19 | 2019-03-19 | 国网江苏省电力有限公司宿迁供电分公司 | A kind of high-tension line electrification display device |
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