CN116381321A - Pole-mounted switch voltage signal measuring device and pole-mounted switch power-off control method - Google Patents
Pole-mounted switch voltage signal measuring device and pole-mounted switch power-off control method Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
- G01R19/2509—Details concerning sampling, digitizing or waveform capturing
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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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00002—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 monitoring
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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
Abstract
The embodiment of the disclosure discloses a pole-mounted switch voltage signal measuring device and a pole-mounted switch power-off control method. The pole-mounted switching voltage signal measuring device comprises: the device comprises a control unit, a pole switch controller and a voltage acquisition unit; the control unit and the voltage acquisition unit are arranged on the pole switch controller; the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit; the first voltage amplifying unit is connected with the pole-mounted switch circuit; the isolation unit is connected with the first voltage amplifying unit and the second voltage amplifying unit through circuits; the control unit is connected with the second voltage amplifying unit circuit. The voltage signal output by the pole switch is measured by the pole switch voltage signal measuring device, so that the safety of a power transmission and distribution system can be improved.
Description
Technical Field
Embodiments of the present disclosure relate to the field of circuits, and in particular, to a pole-mounted switch voltage signal measurement device and a pole-mounted switch power-off control method.
Background
The pole switch is a safety switch which is used on a telegraph pole to ensure the electricity safety, and is mainly used for isolating the high voltage of a circuit. Currently, when measuring a voltage signal output by a pole switch, the following methods are generally adopted: first, the output voltage signal is directly amplified, and then, the amplified voltage signal is measured.
However, the inventors found that when the voltage signal output by the on-column switch is measured in the above manner, there are often the following technical problems:
firstly, because the voltage signal output by the pole switch is smaller, the anti-interference capability is poor, the output voltage signal is directly amplified, the external interference signal and the thermal potential can be amplified in the same proportion, the error between the measured voltage signal and the real voltage signal is larger, and when the real voltage signal is abnormal, the measured voltage signal is not abnormal, the timeliness of the pole switch outage is lower, thereby causing the poor safety of the power transmission and distribution system.
Secondly, when the output voltage signal is measured, the temperature of the output circuit also affects the voltage signal, when judging whether the voltage signal is abnormal, only one dimension of the voltage signal is judged, and the accuracy of the obtained judgment result is lower, so that the safety of the power transmission and distribution system is further poor.
Thirdly, when the pole-mounted switch is controlled by the pole-mounted switch controller to be powered off, the pole-mounted switch is judged only according to the measured voltage signal of the pole-mounted switch, the fault risk that the temperature of the pole-mounted switch controller is too high is not considered, and when the pole-mounted switch controller is too high, the pole-mounted switch cannot be controlled by the pole-mounted switch controller to be powered off, so that the safety of a power transmission and distribution system is further poor.
The above information disclosed in this background section is only for enhancement of understanding of the background of the inventive concept and, therefore, may contain information that does not form the prior art that is already known to those of ordinary skill in the art in this country.
Disclosure of Invention
The disclosure is in part intended to introduce concepts in a simplified form that are further described below in the detailed description. The disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
Some embodiments of the present disclosure propose an on-column switch voltage signal measurement device and an on-column switch power-off control method to address one or more of the technical problems mentioned in the background section above.
In a first aspect, some embodiments of the present disclosure provide an on-column switching voltage signal measurement apparatus comprising: the device comprises a control unit, a pole switch controller and a voltage acquisition unit; the control unit and the voltage acquisition unit are arranged on the on-column switch controller; the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit; the first voltage amplifying unit is connected with the pole switch circuit, wherein the first voltage amplifying unit is configured to amplify and convert an initial alternating voltage output by the pole switch; the isolation unit is in circuit connection with the first voltage amplification unit and the second voltage amplification unit, wherein the isolation unit is configured to perform conversion processing on the current output by the first voltage amplification unit, and input a voltage signal after the conversion processing to the second voltage amplification unit, and the second voltage amplification unit is configured to perform amplification processing on the converted voltage signal output by the isolation unit; the control unit is in circuit connection with the second voltage amplifying unit, wherein the control unit is configured to generate signal type information according to amplified voltage information output by the second voltage amplifying unit, and to control the on-column switch to perform a power-off operation by the on-column switch controller in response to determining that the signal type information satisfies a preset power-off condition.
Optionally, the isolation unit includes a micro transformer and a sampling resistor.
Optionally, the miniature transformer is a current transformer.
Optionally, the second amplifying unit includes a differential operational amplifier and an inverting proportional operational amplifier circuit.
Optionally, the on-column switch voltage signal measurement device further includes a temperature detection unit, wherein the temperature detection unit is detachably disposed inside the on-column switch controller, the temperature detection unit is in circuit connection with the control unit, and the temperature detection unit is configured to perform temperature detection on the on-column switch controller.
In a second aspect, some embodiments of the present disclosure provide a method for controlling power outage of a pole-mounted switch, which is applied to a pole-mounted switch voltage signal measurement device as described in any implementation manner of the first aspect, where the pole-mounted switch voltage signal measurement device includes: the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit, and the method comprises the following steps: amplifying and converting the initial alternating voltage signal output by the pole switch through the first voltage amplifying unit to obtain an amplified current signal; converting the amplified current signal through the isolation unit to obtain a converted voltage signal; amplifying the converted voltage signal through the second voltage amplifying unit to obtain amplified voltage information; generating signal type information according to the amplified voltage information; and in response to determining that the signal type information meets a preset power-off condition, controlling the on-pole switch to execute power-off operation by the on-pole switch controller.
The above embodiments of the present disclosure have the following advantageous effects: the safety of the power transmission and distribution system can be improved through the pole-mounted switch voltage signal measuring device of some embodiments of the present disclosure. Specifically, the reason for the poor safety of the power transmission and distribution system is that: because the voltage signal output by the pole switch is smaller, the anti-interference capability is poor, the output voltage signal is directly amplified, the external interference signal and the thermal potential can be amplified in the same proportion, the error between the measured voltage signal and the real voltage signal is larger, and when the real voltage signal is abnormal, the measured voltage signal is not abnormal, the timeliness of the pole switch outage is lower, so that the safety of a power transmission and distribution system is poor. Based on this, the on-column switching voltage signal measurement apparatus of some embodiments of the present disclosure includes: the device comprises a control unit, a pole switch controller and a voltage acquisition unit; the control unit and the voltage acquisition unit are arranged on the on-column switch controller; the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit; the first voltage amplifying unit is connected with the pole switch circuit, wherein the first voltage amplifying unit is configured to amplify and convert an initial alternating voltage output by the pole switch; the isolation unit is in circuit connection with the first voltage amplification unit and the second voltage amplification unit, wherein the isolation unit is configured to perform conversion processing on the current output by the first voltage amplification unit, and input a voltage signal after the conversion processing to the second voltage amplification unit, and the second voltage amplification unit is configured to perform amplification processing on the converted voltage signal output by the isolation unit; the control unit is in circuit connection with the second voltage amplifying unit, wherein the control unit is configured to generate signal type information according to amplified voltage information output by the second voltage amplifying unit, and to control the on-column switch to perform a power-off operation by the on-column switch controller in response to determining that the signal type information satisfies a preset power-off condition. When the voltage signal output by the pole switch is measured, firstly, the voltage is amplified and converted through the first amplifying unit to drive the isolating unit, then, the external interference signal is reduced through the isolating unit, then, the voltage signal is amplified again through the second amplifying unit to obtain an amplified voltage signal, and whether the voltage signal is abnormal or not is determined through the control unit, so that the error between the measured voltage signal and the actual voltage signal can be reduced, and when the actual voltage signal is abnormal, the pole switch can improve the timeliness of outage, and therefore, the safety of a power transmission and distribution system is improved.
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a pole-mounted switching voltage signal measurement device of some embodiments of the present disclosure;
FIG. 2 is a circuit diagram of a voltage acquisition unit included in an on-column switching voltage signal measurement device of some embodiments of the present disclosure;
fig. 3 is a flow chart of some embodiments of a pole-on switch power-off control method according to the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a circuit diagram of an on-column switching voltage signal measurement device of some embodiments of the present disclosure. Fig. 1 includes a control unit 101, a pole-mounted switch 102, a pole-mounted switch controller 103, a voltage acquisition unit 104, a first voltage amplification unit 1041, an isolation unit 1042, and a second voltage amplification unit 1043.
Fig. 2 is a circuit diagram of a voltage acquisition unit included in an on-column switching voltage signal measurement device of some embodiments of the present disclosure. Fig. 2 includes a first voltage amplifying unit 1041, an isolating unit 1042, and a second voltage amplifying unit 1043.
In some embodiments, the on-column switching voltage signal measurement device may include: a control unit 101, an on-pole switch 102, an on-pole switch controller 103 and a voltage acquisition unit 104. The control unit 101 may be a microcontroller. The voltage acquisition unit 104 may be a unit for acquiring the voltage output from the on-column switch 102. The voltage acquisition unit 104 may include, but is not limited to, a first voltage amplification unit 1041, an isolation unit 1042, and a second voltage amplification unit 1043. The first voltage amplifying unit 1041 described above may be a circuit for amplifying and converting a voltage. The first voltage amplifying unit 1041 may include an operational amplifying circuit and a resistor. The operational amplifier circuit may be an in-phase proportional operational amplifier circuit. The isolation unit 1042 may be a circuit for isolating signal crosstalk between the front end and the back end. The second voltage amplifying unit 1043 may be a circuit for amplifying a voltage.
In some embodiments, the control unit 101 and the voltage acquisition unit 104 may be fixedly disposed on the on-column switch controller 103.
In some embodiments, the first voltage amplifying unit 1041 and the on-column switch 102 may be connected through a circuit. The first voltage amplifying unit 1041 may be configured to amplify and convert the initial ac voltage output from the pole switch 102. Thereby, an amplified current signal can be obtained, which can be used for driving the isolation unit.
In some embodiments, the isolation unit 1042 may be electrically connected to the first voltage amplifying unit 1041 and the second voltage amplifying unit 1043, as shown in fig. 2. The isolation unit 1042 may be configured to perform conversion processing on the current output from the first voltage amplifying unit 1041, and input the converted voltage signal to the second voltage amplifying unit 1043. The second voltage amplifying unit 1043 may be configured to amplify the converted voltage signal output from the isolating unit 1042. Therefore, external interference signals can be reduced, and the accuracy of subsequent voltage signals can be improved.
In some embodiments, the control unit 101 and the second voltage amplifying unit 1043 may be electrically connected. Wherein the control unit 101 may be configured to generate signal type information according to the amplified voltage information outputted from the second voltage amplification unit 1053, and to control the on-column switch 102 to perform a power-off operation by the on-column switch controller 103 in response to determining that the signal type information satisfies a preset power-off condition. The signal type information may be indicative of whether the measured voltage is abnormal. The signal type information may be, but is not limited to, one of the following: normal signal, signal early warning, signal abnormality. The signal normally characterizes that the voltage value output by the switch on the pole is in a preset voltage value range. The preset voltage value range may be a preset voltage value representing normal operation of the switch on the column. The signal early warning can represent that the voltage value output by the pole switch is larger than the upper limit value of the preset voltage value range and smaller than the preset voltage value threshold value. The preset voltage threshold may be a preset minimum value representing a voltage value of the on-column switch when the on-column switch needs to perform a power-off operation. The signal abnormality can represent that the voltage value output by the switch on the column is greater than or equal to a preset voltage value threshold. The preset power-off condition may be that the signal type information indicates that the voltage value output by the switch on the column is greater than or equal to a preset voltage value threshold. The power-off operation may be an operation of closing the on-column switch. In practice, signal type information may be generated according to amplified voltage information output from the second voltage amplifying unit 1043 in various ways, and the on-column switch 102 may be controlled to perform a power-off operation by the on-column switch controller 103 in response to determining that the signal type information satisfies a preset power-off condition.
Alternatively, the isolation unit 1042 may include, but is not limited to, a micro transformer and a sampling resistor.
Alternatively, the miniature transformer may be a current transformer.
Alternatively, the second voltage amplifying unit 1043 may include a differential operational amplifier and an inverting proportional operational amplifier circuit. The output voltage of the differential operational amplifier is the input voltage of the inverting proportional operational amplifier circuit.
Optionally, the above-mentioned on-column switching voltage signal measuring device may further include a temperature detecting unit. Wherein, the temperature detection unit may be an instrument for detecting temperature. For example, the temperature detection unit may be a temperature sensor. The temperature detection unit may be detachably connected to an arbitrary position inside the on-column switch controller 103. The temperature detecting unit and the control unit 101 may be electrically connected. The temperature detection unit may be configured to perform temperature detection on the on-column switch controller 103. Thus, the temperature of the surface of the on-column switch controller can be obtained.
The above embodiments of the present disclosure have the following advantageous effects: the safety of the power transmission and distribution system can be improved through the pole-mounted switch voltage signal measuring device of some embodiments of the present disclosure. Specifically, the reason for the poor safety of the power transmission and distribution system is that: because the voltage signal output by the pole switch is smaller, the anti-interference capability is poor, the output voltage signal is directly amplified, the external interference signal and the thermal potential can be amplified in the same proportion, the error between the measured voltage signal and the real voltage signal is larger, and when the real voltage signal is abnormal, the measured voltage signal is not abnormal, the timeliness of the pole switch outage is lower, so that the safety of a power transmission and distribution system is poor. Based on this, the on-column switching voltage signal measurement apparatus of some embodiments of the present disclosure includes: the device comprises a control unit, a pole switch controller and a voltage acquisition unit; the control unit and the voltage acquisition unit are arranged on the on-column switch controller; the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit; the first voltage amplifying unit is connected with the pole switch circuit, wherein the first voltage amplifying unit is configured to amplify and convert an initial alternating voltage output by the pole switch; the isolation unit is in circuit connection with the first voltage amplification unit and the second voltage amplification unit, wherein the isolation unit is configured to perform conversion processing on the current output by the first voltage amplification unit, and input a voltage signal after the conversion processing to the second voltage amplification unit, and the second voltage amplification unit is configured to perform amplification processing on the converted voltage signal output by the isolation unit; the control unit is in circuit connection with the second voltage amplifying unit, wherein the control unit is configured to generate signal type information according to amplified voltage information output by the second voltage amplifying unit, and to control the on-column switch to perform a power-off operation by the on-column switch controller in response to determining that the signal type information satisfies a preset power-off condition. When the voltage signal output by the pole switch is measured, firstly, the voltage is amplified and converted through the first amplifying unit to drive the isolating unit, then, the external interference signal is reduced through the isolating unit, then, the voltage signal is amplified again through the second amplifying unit to obtain an amplified voltage signal, and whether the voltage signal is abnormal or not is determined through the control unit, so that the error between the measured voltage signal and the actual voltage signal can be reduced, and when the actual voltage signal is abnormal, the timeliness of the pole switch in power failure can be improved, and therefore, the safety of a power transmission and distribution system is improved.
With continued reference to fig. 3, a flow 300 of some embodiments of a pole-on switch power-off control method according to the present disclosure is shown. The pole-mounted switch power-off control method is applied to the pole-mounted switch voltage signal measuring device and comprises the following steps of:
in step 301, an amplifying conversion process is performed on an initial ac voltage signal output by the on-column switch by a first voltage amplifying unit, so as to obtain an amplified current signal.
In some embodiments, the main body of the on-pole switch power-off control method (for example, the on-pole switch voltage signal measurement device shown in fig. 1) may perform amplification conversion processing on the initial ac voltage signal output by the on-pole switch through the first voltage amplification unit, so as to obtain an amplified current signal. Wherein, the above-mentioned pole switch voltage signal measuring device can include: the device comprises a control unit, a pole switch controller and a voltage acquisition unit. The voltage acquisition unit may include a first voltage amplification unit, an isolation unit, and a second voltage amplification unit.
As an example, when the operational amplifier circuit in the first voltage amplifying unit is an in-phase proportional operational amplifier circuit, the execution body may obtain the first amplified voltage signal using the initial ac voltage signal output from the on-column switch as the input signal of the in-phase proportional operational amplifier circuit. Then, a ratio of the first amplified voltage signal to a resistance in the first voltage amplifying unit is determined as an amplified current signal.
In some embodiments, the executing body may perform conversion processing on the amplified current signal through the isolation unit to obtain a converted voltage signal.
As an example, when the above-described isolation unit includes a current transformer and a sampling resistor, first, an amplified current signal is taken as an input current signal of the current transformer, resulting in a secondary-side current signal. Then, the product of the secondary-side current signal and the resistance value of the sampling resistor is determined as the converted voltage signal.
In some embodiments, the executing body may amplify the converted voltage signal by the second amplifying unit to obtain an amplified voltage signal.
As an example, when the above-described second amplifying unit includes a differential operational amplifier and an inverting proportional operational amplifier circuit, first, a converted voltage signal is taken as an input voltage signal of the differential operational amplifier, resulting in a second amplified voltage signal. And then, taking the second amplified voltage signal as an input voltage signal of the inverting proportional operational amplifying circuit to obtain an amplified voltage signal.
In some embodiments, the executing body may generate signal type information according to the amplified voltage information. In practice, the execution subject may generate the signal type information from the amplified voltage information in various ways.
Optionally, the above-mentioned on-column switching voltage signal measuring device may further include a temperature detecting unit.
In some optional implementations of some embodiments, the executing entity may generate the signal type information according to the amplified voltage information by:
and the first step is to conduct feature extraction processing on the amplified voltage information to obtain voltage feature vector information. The voltage characteristic vector information may be a characteristic vector representing amplified voltage information. In practice, the executing body may perform feature extraction processing on the amplified voltage information through a pre-trained voltage information feature extraction model, so as to obtain voltage feature vector information. The voltage information feature extraction model may be a neural network that takes amplified voltage information as input and voltage feature vector information as output.
And secondly, carrying out feature extraction processing on the controller temperature information output by the temperature detection unit to obtain temperature feature vector information. Wherein the controller temperature information may characterize the temperature of the surface of the on-column switch controller. The controller temperature information may include, but is not limited to, a current controller temperature value and a detection time. The current controller temperature value may be a temperature of a surface of the switch controller on the current time column. The detection time may be a time for detecting a temperature of a surface of the on-column switch controller. The temperature characteristic vector information may be a characteristic vector characterizing the temperature information of the controller. In practice, the executing body can perform feature extraction processing on the temperature information of the controller through a pre-trained temperature information feature extraction model to obtain temperature feature vector information. The voltage information feature extraction model may be a neural network that takes temperature information of the controller as input and temperature feature vector information as output.
And thirdly, carrying out matching processing on the voltage characteristic vector information and each piece of preset voltage characteristic vector information in the preset voltage characteristic vector information set to obtain first matching information. Wherein the first matching information includes a first similarity set. The preset voltage characteristic vector information sets correspond to preset signal types. The preset voltage feature vector information in the preset voltage feature vector information set may correspond to one preset signal type of the preset signal types one by one. The preset signal types in the respective preset signal types may be preset signal types. The preset signal type may be, but is not limited to, one of the following: normal signal, signal early warning, signal abnormality. The preset voltage feature vector information in the preset voltage feature vector information set may be preset voltage feature vector information. In practice, first, for each preset voltage feature vector information in the preset voltage feature vector information set, the executing body may determine cosine similarity between the voltage feature vector information and the preset voltage feature vector information as a first similarity, to obtain a first similarity set. Then, the first set of similarities is determined as first matching information.
And step four, carrying out matching processing on each preset temperature characteristic vector in the temperature characteristic vector information and the preset temperature characteristic vector information set to obtain second matching information. Wherein the second matching information includes a second set of similarities. The preset temperature characteristic vector information sets correspond to preset signal types. The preset temperature characteristic vector information in the preset voltage characteristic vector information set may correspond to one preset signal type of the preset signal types one by one. The preset temperature characteristic vector information in the preset voltage characteristic vector information set may be preset temperature characteristic vector information. In practice, first, for each preset temperature feature vector information in the preset temperature feature vector information set, the executing body may determine a cosine similarity between the temperature feature vector information and the preset temperature feature vector information as a second similarity, to obtain a second similarity set. Then, the second set of similarity is determined as second matching information.
And fifthly, generating signal type information according to the first similarity set and the second similarity set. In practice, first, for each of the respective preset signal types, a sum of the first similarity and the second similarity corresponding to the preset signal type is determined as a total similarity. Then, the total similarity satisfying the preset similarity condition among the determined total similarities is determined as the target similarity. The preset similarity condition may be that the total similarity is a maximum value of the total similarities. And finally, determining the preset signal type corresponding to the target similarity as signal type information.
The above technical solution and related content are taken as an invention point of the embodiments of the present disclosure, and solve the second technical problem mentioned in the background art, that is, when the output voltage signal is measured, the temperature of the output circuit will also affect the voltage signal, when judging whether the voltage signal is abnormal, only one dimension of the voltage signal is used for judging, and the accuracy of the obtained judgment result is lower, thereby further causing poor safety of the power transmission and distribution system. Factors that lead to poor safety of power transmission and distribution systems are often as follows: when the output voltage signal is measured, the temperature of the output circuit also affects the voltage signal, and when judging whether the voltage signal is abnormal, the judgment is carried out only from one dimension of the voltage signal, and the accuracy of the obtained judgment result is lower, so that the safety of the power transmission and distribution system is further poor. If the above factors are solved, the effect of improving the safety of the power transmission and distribution system can be achieved. To achieve this effect, in the on-column power-off control method according to some embodiments of the present disclosure, first, feature extraction processing is performed on the amplified voltage information to obtain voltage feature vector information. Thus, the characteristic vector of the voltage signal can be obtained, and can be used for judging the type of the voltage signal. And secondly, carrying out feature extraction processing on the controller temperature information output by the temperature detection unit to obtain temperature feature vector information. Thus, the characteristic vector of the surface temperature of the pole-mounted switch controller can be obtained, and can be used for judging the type of the voltage signal. And then, carrying out matching processing on the voltage characteristic vector information and each preset voltage characteristic vector information in the preset voltage characteristic vector information set to obtain first matching information. Wherein the first matching information includes a first similarity set. Therefore, the similarity of the output voltage signals and the voltage signals corresponding to the preset signal types can be obtained, and the method can be used for judging the types of the output voltage signals. And then, carrying out matching processing on each preset temperature characteristic vector in the temperature characteristic vector information and the preset temperature characteristic vector information set to obtain second matching information. Wherein the second matching information includes a second set of similarities. Thus, the similarity between the temperature output by the temperature detection unit and the temperature corresponding to each preset signal type can be obtained, and the similarity can be used for judging the type of the output voltage signal. And finally, generating signal type information according to the first similarity set and the second similarity set. Therefore, the type of the voltage signal can be obtained according to the voltage output by the pole switch and considering the influence of the temperature in the detection circuit on the voltage signal, so that the accuracy of the type of the obtained voltage signal is improved. And when judging whether the voltage signal is abnormal, judging according to the voltage signal, and considering the influence of the temperature in the detection circuit on the voltage signal, thereby improving the accuracy of the type of the obtained voltage signal, and further improving the safety of the power transmission and distribution system.
In step 305, in response to determining that the signal type information satisfies a preset power-off condition, the on-column switch is controlled by the on-column switch controller to perform a power-off operation.
In some embodiments, the executing body may control the on-column switch to execute the power-off operation through the on-column switch controller in response to determining that the signal type information satisfies a preset power-off condition.
Optionally, the above execution body may further execute the following steps:
the first step, the position information set of the patrol personnel is obtained in response to the fact that the signal type information meets the preset early warning condition. The preset pre-warning condition may be that signal type information is signal pre-warning. The position information of the patrol personnel in the patrol personnel position information set can be longitude and latitude coordinates of the corresponding patrol personnel. In practice, the executing body may acquire the position information set of the patrol personnel from the server by means of wired connection or wireless connection in response to determining that the signal type information meets the preset early warning condition.
And a second step of generating patrol distance information according to the controller position information corresponding to the on-column switch controller and the patrol personnel position information for each patrol personnel position information included in the patrol personnel position information set. The controller position information may be longitude and latitude coordinates corresponding to the on-column switch controller. In practice, for each patrol personnel location information included in the patrol personnel location information set, the execution body may input the controller location information corresponding to the on-column switch controller and the patrol personnel location information into a preset distance formula, so as to obtain a distance value as patrol distance information. The preset distance formula may be a semi-normal formula.
And thirdly, selecting the patrol distance information meeting the preset distance condition from the generated patrol distance information as target distance information. The preset distance condition may be that the inspection distance information is a minimum value in each piece of inspection distance information.
And fourthly, determining the position information of the patrol personnel corresponding to the target distance information as the position information of the target patrol personnel.
And fifthly, transmitting the position information of the controller and the signal type information to a patrol terminal corresponding to the position information of the target patrol personnel so that the target patrol personnel can detect the on-column switch controller. The inspection terminal can be a terminal of an inspection person corresponding to the position information of the target inspection person. The inspection terminal can be a computer or a mobile phone.
Optionally, the above execution body may further execute the following steps:
first, the current time and the signal type information are determined as signal detection information.
And a second step of adding the signal detection information to a signal detection information database. The signal detection information database may be a database for storing signal detection information.
Optionally, the above execution body may further execute the following steps:
in the first step, each signal detection information corresponding to the target time period in the signal detection information set is determined as a target signal detection information set in response to the current time meeting a preset interval duration condition. The preset interval duration condition may be that an interval duration between a current time and a time of last statistics of detection information of each signal is a preset information interval duration. The preset information interval duration may be an interval duration preset to count detection information of each signal.
And a second step of determining each target signal detection information meeting the preset type condition in the target signal detection information group as an early warning signal detection information group. The preset type condition may be that signal type information corresponding to the target signal detection information is signal early warning.
And thirdly, determining the quantity of the detection information of each early warning signal in the detection information group of the early warning signal as the quantity of the early warning information.
And step four, in response to determining that the number of the early warning information meets the preset number condition, the controller position information corresponding to the on-pole switch controller is sent to an overhaul terminal. The preset number of conditions may be that the number of the early warning information is greater than or equal to the preset number of early warning. The preset number of pre-warning may be a preset number. The service terminal may be a terminal of a corresponding service person. For example, the service terminal may be a mobile phone of a service person.
Optionally, the controller temperature information may further include a sequence of controller temperature values corresponding to a preset interval duration. The preset interval duration may be an interval duration of a preset recording temperature value of the controller. The sequence of controller temperature values may be a sequence in which detected temperature values of the respective controllers are arranged in ascending order of time within a period corresponding to the preset interval duration. The controller temperature value in the sequence of controller temperature values may be a temperature of a pole-on switch controller surface.
Optionally, the above execution body may further execute the following steps:
the first step is to input the temperature value sequence of the controller into a first predicted temperature information generation model which is obtained through pre-training, and obtain first predicted temperature information. The first prediction temperature information generation model may be a time series prediction model that takes a controller temperature value sequence as an input and prediction temperature information as an output, and is applicable to a time series prediction model with small data fluctuation. For example, the first predicted temperature information generation model may be an integrated moving average autoregressive model. The first predicted temperature information may include, but is not limited to, a first predicted temperature value. The first predicted temperature value may be a controller temperature value at a time next to the predicted corresponding controller temperature value sequence.
And secondly, inputting the temperature value sequence of the controller into a second predicted temperature information generation model which is obtained through pre-training, so as to obtain second predicted temperature information. The second prediction temperature information generation model may be a time series prediction model which takes a controller temperature value sequence as an input and prediction temperature information as an output, and is applicable to a time series prediction model with large data fluctuation. For example, the two-prediction temperature information generation model may be a long-short-term memory network model. The second predicted temperature information may include, but is not limited to, a second predicted temperature value. The first predicted temperature value may be a controller temperature value at a time next to the predicted corresponding controller temperature value sequence.
And thirdly, determining a model weight coefficient set according to the temperature value sequence of the controller. In practice, first, the execution body may determine the variance of each controller temperature value in the sequence of controller temperature values as a fluctuation value. And secondly, determining a preset weight coefficient set corresponding to the fluctuation value as a model weight coefficient set. The preset weight coefficient in the preset weight coefficient set may be a preset weight coefficient. Each preset weight coefficient in the preset weight coefficient set may correspond to the first predicted temperature information generation model and the second predicted temperature information generation model one by one. The preset weight coefficient set corresponds to a preset fluctuation value range. The preset fluctuation value range may be a preset fluctuation value range. The corresponding fluctuation value may be a fluctuation value within a preset fluctuation value range corresponding to a preset weight coefficient set.
For example, the controller temperature value sequence is {27,28,30,26,29}, the fluctuation value is 2, the corresponding preset fluctuation value range may be (1.5, 2.5), the preset weight coefficient set corresponding to the preset fluctuation value range is {0.4,0.6}, and the model weight coefficient set is {0.4,0.6}.
And a fourth step of determining, as a first temperature value, a product of a model weight coefficient of the model weight coefficient set corresponding to the first predicted temperature information generation model and the first predicted temperature value.
Fifthly, determining a product of a model weight coefficient of the model weight coefficient set corresponding to the second predicted temperature information generation model and the second predicted temperature value as a second temperature value;
and sixthly, determining the sum of the first temperature value, the second temperature value and a preset prediction error value as a controller prediction temperature value. The preset prediction error value may be a preset error value representing an error of the predicted temperature.
And seventhly, transmitting preset temperature early warning information to the inspection terminal in response to the fact that the predicted temperature value of the controller meets the preset temperature early warning condition. The preset temperature early warning condition may be that a predicted temperature value of the controller is greater than or equal to a preset normal temperature threshold. The preset normal temperature threshold may be a preset maximum value representing a temperature of the surface of the controller. The preset temperature early warning information may be information indicating that the preset temperature early warning is required. For example, the preset temperature early warning information may be "the temperature of the controller is at abnormal risk".
The above technical solution and related content are taken as an invention point of the embodiments of the present disclosure, and the third technical problem mentioned in the background art is solved, in which when the on-pole switch controller controls the on-pole switch to turn off the power, the on-pole switch is judged only according to the measured voltage signal of the on-pole switch, and the risk of too high temperature fault of the on-pole switch controller is not considered, when the on-pole switch controller itself has the risk of too high temperature fault, the on-pole switch cannot be controlled by the on-pole switch controller, so that the safety of the power transmission and distribution system is further poor. Factors that lead to poor safety of power transmission and distribution systems are often as follows: when the pole-mounted switch controller controls the pole-mounted switch to be powered off, the pole-mounted switch is judged only according to the voltage signal of the pole-mounted switch obtained through measurement, the fault risk that the temperature of the pole-mounted switch controller is too high is not considered, and when the fault risk that the temperature of the pole-mounted switch controller is too high is considered, the pole-mounted switch cannot be controlled to be powered off through the pole-mounted switch controller, so that the safety of a power transmission and distribution system is further poor. If the above factors are solved, the effect of improving the safety of the power transmission and distribution system can be achieved. To achieve this effect, in the on-pole switch power-off control method according to some embodiments of the present disclosure, first, the above-mentioned controller temperature value sequence is input into a first predicted temperature information generation model trained in advance, so as to obtain first predicted temperature information. Wherein the first predicted temperature information includes a first predicted temperature value. And inputting the temperature value sequence of the controller into a second predicted temperature information generation model which is obtained through pre-training, so as to obtain second predicted temperature information. Wherein the second predicted temperature information includes a second predicted temperature value. Thus, the temperature of the on-column switch controller at the next moment predicted by the two different models can be obtained, and the accuracy of the predicted temperature of the on-column switch controller at the next moment can be improved. And secondly, determining a model weight coefficient set according to the temperature value sequence of the controller. Therefore, the weight coefficient corresponding to the predicted temperature value obtained by different models can be determined according to the fluctuation condition of the temperature value of the controller, and the weight coefficient can be attached to the predicted temperature value more. And then determining a product of the model weight coefficient set corresponding to the first predicted temperature information generation model and the first predicted temperature value as a first temperature value. And determining a product of the model weight coefficient set corresponding to the second predicted temperature information generation model and the second predicted temperature value as a second temperature value. Thus, two predicted temperature values may be obtained, which may be used to determine a final predicted temperature value. And then, determining the sum of the first temperature value, the second temperature value and a preset prediction error value as a controller prediction temperature value. Therefore, the influence of certain errors of the predicted temperature value is considered when the final predicted temperature value is determined, so that the accuracy of the obtained predicted temperature value of the controller can be improved. And finally, in response to determining that the predicted temperature value of the controller meets the preset temperature early-warning condition, sending preset temperature early-warning information to the inspection terminal. Therefore, when the predicted temperature of the on-column switch controller at the next moment is abnormal, early warning can be sent to the patrol personnel in advance, so that the fault risk of the on-column switch controller can be reduced. Also because when the on-pole switch is controlled to be powered off through the on-pole switch controller, the temperature of the on-pole switch controller at the next moment can be predicted in advance through monitoring the temperature change of the on-pole switch controller, so that the inspection personnel can pay attention to the fact that the on-pole switch controller has an excessively high fault risk in advance, and therefore, when the on-pole switch controller has an excessively high fault risk, the inspection personnel can improve timeliness of overhauling the on-pole switch controller, and further improve the safety of a power transmission and distribution system.
The above embodiments of the present disclosure have the following advantageous effects: the icon display method of some embodiments of the present disclosure can improve the safety of the power transmission and distribution system. Specifically, the reason for the poor safety of the power transmission and distribution system is that: when the output voltage signal is measured, the temperature of the output circuit also affects the voltage signal, and when judging whether the voltage signal is abnormal, the judgment is carried out only from one dimension of the voltage signal, and the accuracy of the obtained judgment result is lower, so that the safety of the power transmission and distribution system is further poor. Based on this, in the on-pole switch power-off control method according to some embodiments of the present disclosure, first, the first voltage amplifying unit amplifies and converts the initial ac voltage signal output by the on-pole switch to obtain an amplified current signal. Thus, an amplified current signal can be obtained, which can be used to drive the isolation unit. And secondly, converting the amplified current signal through the isolation unit to obtain a converted voltage signal. Therefore, a voltage signal with less external interference signals can be obtained, and the accuracy of the voltage signal can be improved. And then, amplifying the converted voltage signal by the second voltage amplifying unit to obtain amplified voltage information. Therefore, the voltage signal can be amplified again, so that the sampling precision of the voltage signal can be improved, and the error between the measured voltage signal and the actual voltage signal is reduced. And generating signal type information according to the amplified voltage information and the controller temperature information output by the temperature detection unit. Therefore, a judgment result with higher accuracy can be obtained, and the judgment result can be used for judging whether to control the on-pole switch to execute the power-off operation. And finally, in response to determining that the signal type information meets a preset power-off condition, controlling the on-pole switch to execute power-off operation by the on-pole switch controller. Therefore, when the voltage signal is abnormal and the judgment result is accurate, the timeliness of the pole switch to execute the power-off operation can be improved. And when the voltage signal output by the pole switch is measured, the external interference signal is reduced through the isolation unit, and the voltage signal is amplified, so that the error between the measured voltage signal and the real voltage signal is reduced, and therefore, when the real voltage signal is abnormal, the measured voltage signal can be displayed abnormally in time, the timeliness of the pole switch outage is improved, and the safety of a power transmission and distribution system can be improved.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the invention. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.
Claims (9)
1. An on-column switching voltage signal measurement device, wherein the on-column switching voltage signal measurement device comprises: a control unit, a pole switch controller and a voltage acquisition unit,
the control unit and the voltage acquisition unit are arranged on the pole switch controller;
the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit;
the first voltage amplifying unit is connected with the pole switch circuit, wherein the first voltage amplifying unit is configured to amplify and convert the initial alternating voltage output by the pole switch;
The isolation unit is in circuit connection with the first voltage amplification unit and the second voltage amplification unit, wherein the isolation unit is configured to perform conversion processing on current output by the first voltage amplification unit, and input a voltage signal after the conversion processing to the second voltage amplification unit, and the second voltage amplification unit is configured to perform amplification processing on the converted voltage signal output by the isolation unit;
the control unit is in circuit connection with the second voltage amplifying unit, wherein the control unit is configured to generate signal type information according to amplified voltage information output by the second voltage amplifying unit, and control the on-column switch to perform a power-off operation through the on-column switch controller in response to determining that the signal type information meets a preset power-off condition.
2. The on-column switching voltage signal measurement device of claim 1, wherein the isolation unit comprises a miniature transformer and a sampling resistor.
3. The on-column switching voltage signal measuring device of claim 2, wherein the miniature transformer is a current transformer.
4. The on-column switching voltage signal measuring device according to claim 1, wherein the second voltage amplifying unit includes a differential operational amplifier and an inverting proportional operational amplifier circuit.
5. The on-column switching voltage signal measurement device of claim 1, further comprising a temperature detection unit detachably disposed inside the on-column switching controller, the temperature detection unit being in circuit connection with the control unit, the temperature detection unit being configured to perform temperature detection of the on-column switching controller.
6. A pole-mounted switch power-off control method applied to the pole-mounted switch voltage signal measuring device according to one of claims 1 to 5, the pole-mounted switch voltage signal measuring device comprising: the voltage acquisition unit comprises a first voltage amplification unit, an isolation unit and a second voltage amplification unit, and the method comprises the following steps:
amplifying and converting the initial alternating voltage signal output by the pole switch through the first voltage amplifying unit to obtain an amplified current signal;
converting the amplified current signal through the isolation unit to obtain a converted voltage signal;
amplifying the converted voltage signal through the second voltage amplifying unit to obtain amplified voltage information;
Generating signal type information according to the amplified voltage information;
and in response to determining that the signal type information meets a preset power-off condition, controlling the on-pole switch to execute power-off operation through the on-pole switch controller.
7. The method of claim 6, wherein the method further comprises:
acquiring a position information set of the patrol personnel in response to determining that the signal type information meets a preset early warning condition;
for each patrol personnel position information included in the patrol personnel position information set, generating patrol distance information according to the controller position information corresponding to the on-pole switch controller and the patrol personnel position information;
selecting patrol distance information meeting preset distance conditions from the generated patrol distance information as target distance information;
determining the position information of the patrol personnel corresponding to the target distance information as the position information of the target patrol personnel;
and sending the controller position information and the signal type information to a patrol terminal corresponding to the position information of the target patrol personnel so as to enable the target patrol personnel to detect the on-column switch controller.
8. The method of claim 6, wherein the method further comprises:
Determining the current time and the signal type information as signal detection information;
the signal detection information is added to a signal detection information database.
9. The method of claim 8, wherein the method further comprises:
determining each signal detection information corresponding to a target time period in the signal detection information database as a target signal detection information group in response to the current time meeting a preset interval duration condition;
determining each target signal detection information meeting the preset type condition in the target signal detection information group as an early warning signal detection information group;
determining the quantity of the detection information of each early warning signal in the detection information group of the early warning signal as the quantity of the early warning information;
and in response to determining that the number of the early warning information meets a preset number condition, transmitting controller position information corresponding to the on-pole switch controller to an overhaul terminal.
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