CN113765219A - Power system knife switch control method and device, computer equipment and storage medium - Google Patents
Power system knife switch control method and device, computer equipment and storage medium Download PDFInfo
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- CN113765219A CN113765219A CN202110957431.7A CN202110957431A CN113765219A CN 113765219 A CN113765219 A CN 113765219A CN 202110957431 A CN202110957431 A CN 202110957431A CN 113765219 A CN113765219 A CN 113765219A
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- 238000004590 computer program Methods 0.000 claims description 14
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- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 2
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- 238000002955 isolation Methods 0.000 description 2
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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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Control Of Electric Motors In General (AREA)
Abstract
The application relates to a method and a device for controlling a disconnecting link of a power system, computer equipment and a storage medium. The power system knife switch control method comprises the following steps: obtaining the model and the current state of a disconnecting link; the current state comprises an opening state and a closing state; determining a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameter; determining the rotating direction for controlling the knife switch to rotate according to the current state; sending a first control instruction; the first control instruction is used for instructing the braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter. According to the method for controlling the disconnecting link of the electric power system, the control device directly controls the braking device to drive the disconnecting link to rotate, the disconnecting link is switched on and off, personnel are not needed, the labor cost is reduced, and the working efficiency is improved.
Description
Technical Field
The present disclosure relates to the field of power system technologies, and in particular, to a method and an apparatus for controlling a disconnecting link of a power system, a computer device, and a storage medium.
Background
A knife switch, also called a knife switch or a ground switch, is a kind of switch in power equipment, and is widely used in power systems, such as power system core sites of converter stations and transformers.
In the traditional method for controlling the disconnecting link of the power system, operation and maintenance personnel need to use an operating rod on the disconnecting link equipment body on the spot to perform switching-on and switching-off operations, so that the efficiency is low. Therefore, the traditional method for controlling the disconnecting link of the power system needs manual operation, and has the problem of low working efficiency.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for controlling a disconnecting link of an electric power system, a computer device, and a storage medium, which have high operation efficiency.
A power system knife switch control method comprises the following steps:
obtaining the model and the current state of a disconnecting link; the current state comprises an opening state and a closing state;
determining a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameter;
determining a rotating direction for controlling the disconnecting link to rotate according to the current state;
sending a first control instruction; the first control instruction is used for instructing a braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
In one embodiment, before determining the driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relationship between the model and the driving parameter, the method further includes:
and determining the corresponding relation between the model and the driving parameters.
In one embodiment, the driving parameter is a critical torque; the determining the corresponding relation between the model and the driving parameters comprises the following steps:
sending a second control instruction; the second control instruction is used for indicating the braking device to apply a preset initial moment to drive the disconnecting link to rotate along the current rotating direction;
judging whether the disconnecting link can rotate along the current rotating direction;
under the condition that the disconnecting link can rotate along the current rotating direction, subtracting a preset value from the current moment, and correspondingly changing the rotating direction until the disconnecting link cannot rotate along the current rotating direction to obtain a critical moment;
and obtaining the model of the disconnecting link, and determining the corresponding relation between the model and the critical torque according to the model and the critical torque.
In one embodiment, after determining whether the disconnecting link can rotate in the current rotation direction, if the disconnecting link can rotate in the current rotation direction, subtracting a preset value from the current torque, and correspondingly changing the rotation direction until the disconnecting link cannot rotate in the current rotation direction, before obtaining the critical torque, the method further includes:
under the condition that the disconnecting link cannot rotate along the current rotating direction, adding a set value to the current moment until the disconnecting link can rotate along the current rotating direction; the set value is greater than the preset value.
In one embodiment, after the sending the first control instruction, the method further includes:
judging whether the disconnecting link rotates in place or not;
if yes, sending an ending instruction; the ending instruction is used for indicating the brake device to stop running;
if not, alarm information is sent.
In one embodiment, the determining whether the knife switch is rotated in place includes:
after the current driving parameter is increased by a critical value, if the disconnecting link still cannot rotate, the disconnecting link is determined to rotate in place;
otherwise, determining that the disconnecting link is not rotated in place.
An electric power system knife switch control device comprises:
the acquisition module is used for acquiring the model and the current state of the disconnecting link; the current state comprises an opening state and a closing state;
the parameter determining module is used for determining a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameter, and determining a rotating direction for controlling the rotation of the disconnecting link according to the current state;
the sending module is used for sending a first control instruction; the first control instruction is used for instructing a braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
In one embodiment, the power system disconnecting link control device further includes:
and the generation module is used for determining the corresponding relation between the model and the driving parameters.
In one embodiment, the driving parameter is a critical torque, and the generation module is specifically configured to: sending a second control instruction; the second control instruction is used for indicating a braking device to apply a preset initial moment and driving the disconnecting link to rotate along the current rotating direction; judging whether the disconnecting link can rotate along the current rotating direction; under the condition that the disconnecting link can rotate along the current rotating direction, subtracting a preset value from the current moment, and correspondingly changing the rotating direction until the disconnecting link cannot rotate along the current rotating direction to obtain a critical moment; and obtaining the model of the disconnecting link, and determining the corresponding relation between the model and the critical torque according to the model and the critical torque.
In one embodiment, the generation module is further configured to: under the condition that the disconnecting link cannot rotate along the current rotating direction, adding a set value to the current moment until the disconnecting link can rotate along the current rotating direction; the set value is greater than the preset value.
In one embodiment, the power system disconnecting link control device further comprises a judging module and an alarming module; the judging module is used for judging whether the disconnecting link rotates in place or not; the alarm module is used for sending alarm information under the condition that the disconnecting link is not rotated to the right position; the sending module is also used for sending an ending instruction under the condition that the disconnecting link rotates in place; the end instruction is used for indicating the brake device to stop running.
In one embodiment, the determining module is specifically configured to: after the current driving parameter is increased by a critical value, if the disconnecting link still cannot rotate, the disconnecting link is determined to rotate in place; otherwise, determining that the disconnecting link is not rotated in place.
A computer device comprising a memory storing a computer program and a processor implementing the steps of the method described above when executing the computer program.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.
According to the method for controlling the disconnecting link of the electric power system, the control device directly controls the braking device to drive the disconnecting link to rotate, the disconnecting link is switched on and off, personnel are not needed, the labor cost is reduced, and the working efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method for controlling a power system switch according to an embodiment;
FIG. 2 is a flow chart of a method for controlling a disconnecting link of a power system according to another embodiment;
FIG. 3 is a flow chart of obtaining model and current status of a knife switch in one embodiment;
FIG. 4 is a block diagram of an embodiment of a device for controlling a disconnecting link of a power system;
FIG. 5 is a block diagram of a knife switch control device of the power system in another embodiment;
FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1, a method for controlling a disconnecting link of a power system is provided, which includes steps S200 to S800.
Step S200: and acquiring the model and the current state of the disconnecting link.
The models of the disconnecting switches can be represented by different numbers, for example, the model of the indoor type isolation disconnecting switch can be recorded as "GN-rated voltage class/rated current", and the model of the outdoor type isolation disconnecting switch can be recorded as "GW-rated voltage class/rated current". The current state of the knife switch comprises a switch-off state and a switch-on state. Specifically, the determination method of the model and the current state of the disconnecting link is not unique, for example, the model and the current state of the disconnecting link can be directly sent to the control device by operation and maintenance personnel through a terminal or an interaction device; the control device can also be configured with an image acquisition device to acquire images of the disconnecting link in real time, and the model and the current state of the disconnecting link are determined by analyzing the acquired images. Furthermore, a sensing device can be arranged at the opening position and/or the closing position of the disconnecting link, and the control device acquires sensing data corresponding to the sensing device, so that the current state of the disconnecting link is determined.
Step S400: and determining the driving parameters for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameters.
The driving parameters can include force, moment and the like, and the disconnecting link can rotate in different directions by changing the driving parameters applied to the disconnecting link, so that the switching-off or switching-on operation is realized. The driving parameter for controlling the rotation of the knife switch refers to a critical driving parameter which enables the knife switch to rotate and has relatively less energy loss under the current condition.
Step S600: and determining the rotating direction for controlling the rotation of the disconnecting link according to the current state.
As mentioned above, the current state of the knife switch includes an open state and a closed state, and thus the rotation direction of the knife switch also includes two directions: when the disconnecting link is in a disconnecting state, namely the initial position is in a disconnecting position and the disconnecting link needs to rotate from the disconnecting position to a closing position, the disconnecting link is recorded as positive rotation; when the knife switch is in a closing state, namely the initial position is in a closing position and the knife switch needs to rotate from the closing position to a separating position, the knife switch is recorded as reverse rotation.
Step S800: and sending a first control instruction, wherein the first control instruction is used for instructing a braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
Wherein, the braking device can be a motor or an operation robot, etc. The knife switch is driven by the braking device and rotates along the rotating direction to perform the action of opening or closing. Specifically, an operating rod of the braking device is matched with an operating hole of the disconnecting link, and in the driving process, the operating rod is inserted into the operating hole of the disconnecting link and then exerts certain acting force to drive the disconnecting link to rotate. In one embodiment, the driving device is a direct current motor with adjustable rotating speed v (r/min) and torque T (N · m), power P (kW) is invariable, and T30000P/(pi · v) ≈ 9550P/v, namely, the torque and the rotating speed are in an inverse proportion relation, and one parameter is adjusted to determine the other parameter so as to adjust the driving parameter, so that the adjusting process of the driving parameter can be simplified, and the working efficiency is further improved.
According to the method for controlling the disconnecting link of the electric power system, the control device directly controls the braking device to drive the disconnecting link to rotate, the disconnecting link is switched on and off, personnel are not needed, the labor cost is reduced, and the working efficiency is improved.
In one embodiment, as shown in fig. 2, after step S800, step S900 is further included: judging whether the disconnecting link rotates in place or not; if yes, sending an ending instruction; if not, alarm information is sent.
The fact that the disconnecting link rotates in place means that the disconnecting link rotates from a closing position to an opening position to complete a disconnecting operation, or the fact that the disconnecting link rotates from the opening position to the closing position to complete a closing operation. Specifically, the manner of determining whether the knife switch is rotated in place is not unique. For example, the image acquisition device can be configured to acquire images of the knife switch in real time, and the control device can analyze the acquired images to determine whether the knife switch is rotated in place.
Further, in one embodiment, after the current driving parameter is increased by the threshold value, if the knife switch still cannot rotate, it is determined that the knife switch rotates in place; otherwise, determining that the knife switch is not rotated in place. Specifically, when the disconnecting link rotates in place, the metal connectors of the disconnecting link are mutually clamped, the rotating torque of the operating mechanism of the disconnecting link sharply increases, if the current driving parameter is increased by a critical value, the disconnecting link cannot rotate, the fact that the disconnecting link rotates in place is indicated, and if the current driving parameter is not increased by the critical value, the fact that the disconnecting link does not rotate in place is indicated. Wherein the threshold value is determined by a specific parameter of the braking device. For example, a dc motor with adjustable rotation speed and torque, constant power P and T30000P/(pi · v) ≈ 9550P/v is taken as an example, the driving parameter is torque, and the threshold value may be 19N · m, 20N · m or 21N · m.
In addition, if the knife switch rotates to the right position, an ending instruction is sent, and the ending instruction is used for indicating the brake device to stop running. Otherwise, sending alarm information, and facilitating operation and maintenance personnel to know the operation condition of the disconnecting link in time and carry out subsequent processing. The alarm information has a non-unique form, and can be correspondingly alarmed in the forms of sound-light alarm, display alarm and the like, wherein the sound-light alarm comprises alarm forms of an indicator light, a loudspeaker and the like, and the display alarm comprises alarm forms of short messages, mails, voice and the like. In this embodiment, the alarm information and the information data corresponding to the disconnecting link are also displayed in an associated manner through the display interface, and the operation and maintenance personnel can know the specific disconnecting link with the alarm on the display interface, so as to process the disconnecting link with the alarm.
In an embodiment, with continued reference to fig. 2, before step S400, the method further includes step S300: and determining the corresponding relation between the model and the driving parameters. Step S300 may be performed before, after, or simultaneously with step S200.
For example, the operator may input the model and the driving parameter information of the disconnecting link through a terminal or an interactive device, and the control device directly obtains the model of the disconnecting link and the driving parameter corresponding to the model, and determines the corresponding relationship between the model and the driving parameter.
In one embodiment, as shown in fig. 3, the driving parameter is a critical torque, and the step S200 includes steps S220 to S280.
Step S220: sending a second control instruction; the second control instruction is used for indicating the braking device to apply a preset initial torque to drive the disconnecting link to rotate along the current rotating direction.
The preset initial torque and the initial rotation direction can be manually set or automatically acquired. For example, the operation and maintenance personnel can set the preset initial parameters through a terminal or an interaction device according to the type of the disconnecting link; the storage device can also be configured to store preset initial parameters of different types of disconnecting links, and the control device directly obtains the preset initial parameters of the corresponding types of disconnecting links. Further, the rotation direction of the knife switch can be determined according to the current state of the knife switch: when the disconnecting link is in a disconnecting state, namely the initial position is in a disconnecting position and the disconnecting link needs to be rotated from the disconnecting position to a closing position, the initial rotation direction is positive rotation; when the knife switch is in a closing state, namely the initial position is in a closing position and needs to rotate from the closing position to a separating position, the initial rotation direction is reverse rotation.
Step S240: and judging whether the disconnecting link can rotate along the current rotating direction.
Similarly, the manner of determining whether the knife switch can rotate along the current rotation direction is not unique. For example, an image acquisition device may be configured to acquire images of the disconnecting link in real time, and the control device determines whether the disconnecting link can rotate in the current rotation direction by analyzing the acquired images; or a corresponding sensing device can be arranged at the opening position and/or the closing position of the disconnecting link, and the control device acquires sensing data of the sensing device, so that whether the disconnecting link can rotate along the current rotating direction is determined.
Step S260: and under the condition that the disconnecting link can rotate in the current rotating direction, subtracting a preset value from the current moment, and correspondingly changing the rotating direction until the disconnecting link cannot rotate in the current rotating direction to obtain the critical moment.
Wherein, the current rotation direction is the initial rotation direction. The preset value is determined by the specific parameters of the braking device. For example, a dc motor with adjustable rotation speed v and torque T, invariable power P, and T30000P/(pi · v) ≈ 9550P/v, the preset value may be set to 1N · m, 2N · m, or 3N · m. If the knife switch can rotate along the current rotation direction, the current moment is larger than or equal to the critical moment for controlling the corresponding knife switch to rotate, and even the moment is possibly overlarge. At the moment, subtracting a preset value from the current moment to obtain a new current moment, correspondingly changing the rotating direction to be the opposite direction of the current rotating direction to obtain a new current rotating direction, and then judging whether the disconnecting link can rotate along the rotating direction: if so, continuously subtracting the preset value from the current moment, and correspondingly changing the rotation direction to obtain a new current moment and a new current rotation direction until the disconnecting link cannot rotate along the current rotation direction; if not, the search test of the critical moment is ended. It can be understood that the critical torque is the current torque of the previous time of the end search test, i.e. the minimum value of all current torques capable of driving the knife switch to rotate.
Step S280: and obtaining the model of the disconnecting link, and determining the corresponding relation between the model and the critical torque according to the model and the critical torque.
For the specific definition of the knife switch model, see above, the detailed description is omitted here. Specifically, the control device obtains the model of the current disconnecting link, and can determine the corresponding relation between the model and the critical torque according to the model and the critical torque. Further, the control device may store the correspondence between the model and the critical torque in the storage device for subsequent retrieval.
In addition, for a drive device with invariable power, the torque is changed and the rotating speed is correspondingly changed so as to ensure the normal operation of the device. It can be understood that in this case, since the torque is inversely related to the rotation speed, the torque is reduced and the rotation speed is increased, which is beneficial to improving the braking control efficiency of the disconnecting link.
In an embodiment, with continued reference to fig. 3, after step S240 and before step S260, the method further includes step S250: and under the condition that the disconnecting link cannot rotate along the current rotating direction, adding the current moment to a set value until the disconnecting link can rotate along the current rotating direction.
Wherein the set value is greater than the preset value and the set value is determined by specific parameters of the braking device. Similarly, the preset value can be set to 4N · m, 5N · m or 6N · m, taking as an example a dc motor with adjustable rotation speed and torque, constant power and T30000P/(pi · v) ≈ 9550P/v. If the knife switch can not rotate along the current rotation direction, the current moment is smaller than the critical moment for controlling the corresponding knife switch to rotate. At the moment, the current moment is added with a set value to obtain a new current moment, and whether the disconnecting link can rotate along the current rotating direction is judged: if yes, executing the action of step S260 to obtain a critical torque; if not, the current moment is continuously added with the set value to obtain a new current moment until the disconnecting link cannot rotate along the current rotation direction, and then the step S260 is executed to obtain the critical moment.
For the sake of understanding, the following description will be made in detail with respect to the specific determination process of the critical torque and the critical rotational speed, taking as an example a dc motor in which the rotational speed v and the torque T are both adjustable, the power P is not variable, and T is 30000P/(pi · v) ≈ 9550P/v.
In one embodiment, the initial torque of the braking device is set to 40N m, the initial rotating speed is 71.6r/min, and the knife switch with the model number 1 can be rotated in the forward direction, so that the knife switch is rotated from the open position to the closed position. The control device subtracts a preset value of 1N m from the current moment, the moment is 39N m, the rotating speed is correspondingly adjusted to 73.5r/min, the rotating direction is correspondingly adjusted to reverse rotation, and at the moment, the disconnecting link with the model number of 1 rotates from an on position to an off position; the control device repeats the steps until the knife switch can not be rotated, at the moment, the torque is 34N m, and the rotating speed is 84.3 r/min. The critical torque of the knife switch with the model number 1 is 35 N.m, and the corresponding critical rotating speed is 81.9 r/min.
In another embodiment, the initial torque of the braking device is set to 45N · m, the initial rotating speed is 63.7r/min, and the knife switch with the model 2 cannot be rotated reversely, so that the knife switch is rotated from the closed position to the open position. The control device adds a set value of 5N m to the current moment, the moment is 50N m, the rotating speed is correspondingly adjusted to 57.3r/min, and at the moment, the disconnecting link with the model number of 2 rotates from the closing position to the opening position. Then, the control device subtracts a preset value of 1N m from the current moment, the moment is 49N m, the rotating speed is correspondingly adjusted to 58.5r/min, the rotating direction is correspondingly adjusted to positive rotation, and at the moment, the disconnecting link with the model number 2 rotates from the open position to the closed position; the control device repeats the steps until the knife switch can not be rotated, at the moment, the torque is 48N m, and the rotating speed is 59.7 r/min. Then, the critical torque of the knife switch with the model number 2 is 49 N.m, and the corresponding critical rotating speed is 58.5 r/min.
In the above embodiment, a specific process of determining the correspondence between the model number and the driving parameter by using a control variable method is provided, and the critical torque of the rotatable disconnecting link operating mechanism is obtained by gradually increasing or decreasing the torque applied to the disconnecting link by the driving device, so that the rotating speed is fastest, and the working efficiency of the disconnecting link control process of the power system is improved.
It should be understood that, although the steps in the flowcharts shown in the above embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily executed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in each flowchart involved in the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
In one embodiment, as shown in fig. 4, there is provided a power system knife switch control device, including: an obtaining module 200, a parameter determining module 400 and a sending module 600, wherein: an obtaining module 200, configured to obtain a model and a current state of the disconnecting link; the current state comprises an opening state and a closing state; the parameter determining module 400 is configured to determine a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relationship between the model and the driving parameter, and determine a rotation direction for controlling the rotation of the disconnecting link according to the current state; a sending module 600, configured to send a first control instruction; the first control instruction is used for instructing the braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
In one embodiment, as shown in fig. 5, the power system knife switch control device further includes a generating module 300 for determining correspondence between model and driving parameters.
In one embodiment, the driving parameter is a critical torque, and the generating module 300 is specifically configured to: sending a second control instruction; the second control instruction is used for indicating the braking device to apply a preset initial torque and driving the disconnecting link to rotate along the current rotation direction; judging whether the disconnecting link can rotate along the current rotating direction; under the condition that the disconnecting link can rotate along the current rotating direction, subtracting a preset value from the current moment, and correspondingly changing the rotating direction until the disconnecting link cannot rotate along the current rotating direction to obtain a critical moment; and obtaining the model of the disconnecting link, and determining the corresponding relation between the model and the critical torque according to the model and the critical torque.
In one embodiment, the generation module 300 is further configured to: under the condition that the disconnecting link cannot rotate along the current rotating direction, adding a set value to the current moment until the disconnecting link can rotate along the current rotating direction; the set value is greater than the preset value.
In one embodiment, please continue to refer to fig. 5, the electrical system disconnecting link control device further includes a determining module 700 and an alarming module 800. The judging module 700 is used for judging whether the disconnecting link rotates in place; the alarm module 800 is used for sending alarm information when the disconnecting link is not rotated to the right position. The sending module 600 is further configured to send an ending instruction when the disconnecting link rotates in place; the end command is used to instruct the brake device to stop operating.
In one embodiment, the determining module 700 is specifically configured to: after the current driving parameter is increased by a critical value, if the disconnecting link still cannot rotate, the disconnecting link is determined to rotate in place; otherwise, determining that the knife switch is not rotated in place.
For specific limitations of the power system knife switch control device, reference may be made to the above limitations of the power system knife switch control method, which is not described herein again. All or part of each module in the power system knife switch control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as shown in fig. 6. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a power system knife switch control method. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the computer equipment, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the above-described method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for controlling a disconnecting link of an electric power system is characterized by comprising the following steps:
obtaining the model and the current state of a disconnecting link; the current state comprises an opening state and a closing state;
determining a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameter;
determining a rotating direction for controlling the disconnecting link to rotate according to the current state;
sending a first control instruction; the first control instruction is used for instructing a braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
2. The method for controlling the disconnecting link of the power system according to claim 1, wherein before determining the driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relationship between the model and the driving parameter, the method further comprises:
and determining the corresponding relation between the model and the driving parameters.
3. The power system knife switch control method according to claim 2, characterized in that the driving parameter is a critical torque; the determining the corresponding relation between the model and the driving parameters comprises the following steps:
sending a second control instruction; the second control instruction is used for indicating a braking device to apply a preset initial moment and driving the disconnecting link to rotate along the current rotating direction;
judging whether the disconnecting link can rotate along the current rotating direction;
under the condition that the disconnecting link can rotate along the current rotating direction, subtracting a preset value from the current moment, and correspondingly changing the rotating direction until the disconnecting link cannot rotate along the current rotating direction to obtain a critical moment;
and obtaining the model of the disconnecting link, and determining the corresponding relation between the model and the critical torque according to the model and the critical torque.
4. The method for controlling the disconnecting link of the power system according to claim 3, wherein after determining whether the disconnecting link can rotate in the current rotating direction, if the disconnecting link can rotate in the current rotating direction, subtracting a preset value from the current torque, and correspondingly changing the rotating direction until the disconnecting link cannot rotate in the current rotating direction, before obtaining the critical torque, the method further comprises:
under the condition that the disconnecting link cannot rotate along the current rotating direction, adding a set value to the current moment until the disconnecting link can rotate along the current rotating direction; the set value is greater than the preset value.
5. The power system knife switch control method according to any one of the claims 1 to 4, characterized in that after the sending the first control command, the method further comprises:
judging whether the disconnecting link rotates in place or not;
if yes, sending an ending instruction; the ending instruction is used for indicating the brake device to stop running;
if not, alarm information is sent.
6. The method for controlling the disconnecting link of the power system according to claim 5, wherein the determining whether the disconnecting link is rotated in place comprises:
after the current driving parameter is increased by a critical value, if the disconnecting link still cannot rotate, the disconnecting link is determined to rotate in place;
otherwise, determining that the disconnecting link is not rotated in place.
7. An electric power system switch control device, characterized by comprising:
the acquisition module is used for acquiring the model and the current state of the disconnecting link; the current state comprises an opening state and a closing state;
the parameter determining module is used for determining a driving parameter for controlling the rotation of the disconnecting link according to the model and the corresponding relation between the model and the driving parameter, and determining a rotating direction for controlling the rotation of the disconnecting link according to the current state;
the sending module is used for sending a first control instruction; the first control instruction is used for instructing a braking device to drive the disconnecting link to rotate along the rotating direction under the condition of the driving parameter.
8. The electrical system knife switch control device of claim 7, further comprising:
and the generation module is used for determining the corresponding relation between the model and the driving parameters.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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| CN202110957431.7A CN113765219A (en) | 2021-08-18 | 2021-08-18 | Power system knife switch control method and device, computer equipment and storage medium |
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| CN202110957431.7A CN113765219A (en) | 2021-08-18 | 2021-08-18 | Power system knife switch control method and device, computer equipment and storage medium |
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