CN112821359A - Protection system for power line, circuit breaker, and protection method for power line - Google Patents
Protection system for power line, circuit breaker, and protection method for power line Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims abstract description 93
- 230000002159 abnormal effect Effects 0.000 claims abstract description 51
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- 230000011664 signaling Effects 0.000 claims abstract description 5
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- 238000003199 nucleic acid amplification method Methods 0.000 claims description 7
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- 230000000737 periodic effect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present application relates to a protection system for a power consumption line, a circuit breaker, and a protection method for a power consumption line. The system comprises a monitoring sensor comprising a switching value sensor and an operation monitoring sensor, wherein the switching value sensor is used for being connected with a protection execution switch so as to monitor the switching state of the protection execution switch to obtain a switching value signal, and the operation monitoring sensor is used for being connected with an electric circuit so as to monitor the operation state of the electric circuit to obtain an operation signal; the input end of the signal acquisition device is connected with the monitoring sensor, and the signal acquisition device is used for acquiring switching value signals and operation signals; and the processing device is used for determining whether the power utilization circuit is abnormal or not based on the switching value signal and the operation signal, and controlling the protection execution switch to perform tripping action when the power utilization circuit is abnormal. The system can protect the power circuit in time.
Description
Technical Field
The present application relates to the field of power safety technologies, and in particular, to a protection system for a power line, a circuit breaker, and a protection method for a power line.
Background
With the rapid development of power safety, how to protect the power line is more and more important.
At present, in order to protect a power line, a circuit breaker is generally disposed on the power line, so as to protect the power line. The protection mechanism of a circuit breaker is to disconnect the supply of power on the used circuit when it is short-circuited.
However, the current protection mechanism of the circuit breaker has the problem that the protection of the used circuit is not timely enough.
Disclosure of Invention
The present application was made based on the recognition and study of the following problems:
the circuit breaker is internally provided with a protection execution switch which is arranged on the used circuit, and when the used circuit is short-circuited, the protection execution switch is subjected to tripping operation, so that power supply on the used circuit is disconnected. The protection execution switch of the current circuit breaker is only used for tripping operation when a short circuit occurs to a power line, the current circuit breaker cannot be protected in time when the power line is abnormal, and the power line can be protected only when the short circuit occurs to the power line, so that the protection of the power line is not timely enough.
In view of the above, it is necessary to provide a protection system for a power line, a circuit breaker, and a protection method for a power line, which can protect the power line in time.
The utility model provides a protection system with electric wire way for protect with electric wire way, be provided with the protection on the electric wire way and carry out the switch, the system includes:
the monitoring sensor comprises a switching value sensor and an operation monitoring sensor, the switching value sensor is used for being connected with the protection execution switch to monitor the switching state of the protection execution switch to obtain a switching value signal, and the operation monitoring sensor is used for being connected with the power circuit to monitor the operation state of the power circuit to obtain an operation signal;
the input end of the signal acquisition device is connected with the monitoring sensor, and the signal acquisition device is used for acquiring the switching value signal and the operation signal;
the processing device, processing device's input with signal acquisition device's output is connected, processing device's control end with the protection execution switch is connected, processing device is used for the basis the switching value signal with the running signal confirms whether the power consumption circuit takes place unusually, and control when the power consumption circuit takes place unusually the protection execution switch action of tripping.
In one embodiment, the operation monitoring sensor includes at least one of a voltage transformer, a current transformer, and a temperature sensor.
In one embodiment, the signal acquisition device comprises:
the input end of the analog-to-digital conversion module is connected with the monitoring sensor, the output end of the analog-to-digital conversion module is connected with the processing device, and the analog-to-digital conversion module is used for converting analog signals in the switching value signal and the operation signal into digital signals to obtain digital monitoring signals;
the processing device is used for determining whether the power circuit is abnormal or not based on the digital monitoring signal.
In one embodiment, the analog-to-digital conversion module includes:
the analog-to-digital converter is used for converting an analog signal into a digital signal and is provided with a control register, a state register, a channel selection register and a result register;
the control register is used for controlling the analog-to-digital converter to start conversion or stop conversion;
the state register is used for controlling a conversion mode of the analog-to-digital converter for signal conversion;
the channel selection register is used for controlling the analog-to-digital converter to receive at least one analog signal sent by the monitoring sensor;
the result register is used for storing the conversion result of the digital-to-analog converter conversion signal.
In one embodiment, the processing device comprises:
the digital signal processor is used for receiving the digital monitoring signal, determining whether the power circuit is abnormal or not based on the digital monitoring signal, and generating a control command when the power circuit sends the abnormality;
the input end of the control module is connected with the output end of the digital signal processor, the control end of the control module is connected with the protection execution switch, and the control module is used for controlling the protection execution switch to perform tripping action after receiving a control command.
In one embodiment, the control module comprises:
the input end of the control unit is connected with the output end of the digital signal processor, and the control unit is used for generating a tripping driving signal after receiving a control command;
the input end of the signal amplification unit is connected with the output end of the control unit, the output end of the signal amplification unit is connected with the protection execution switch, and the signal amplification unit is used for amplifying the tripping driving signal and then sending the tripping driving signal to the protection execution switch so as to drive the protection execution switch to trip.
In one embodiment, the operation monitoring sensor includes a voltage transformer and a current transformer, the processing device is further configured to determine power consumption information of the power consumption line based on a voltage signal monitored by the voltage transformer and a current signal monitored by the current transformer, and the system further includes:
the input end of the communication device is connected with the output end of the processing device, and the communication device is used for transmitting the electricity utilization information to the outside;
and the display device is used for displaying the monitoring parameters related to the power utilization line in real time and initiating an alarm prompt when the power utilization line is abnormal.
In one embodiment, the method further comprises the following steps:
the input end of the signal preprocessing device is connected with the output end of the monitoring sensor, the output end of the signal preprocessing device is connected with the analog-to-digital conversion module, and the signal preprocessing device is used for filtering out non-periodic components and higher harmonics of at least one of the switching value signals and the state monitoring signals and converting the filtered signals into signal intervals matched with the analog-to-digital conversion module.
A circuit breaker comprises the protection system of the power utilization line.
A method of protecting a power utility line, comprising:
acquiring a switching value signal and an operation signal acquired by a signal acquisition device, wherein the switching value signal is obtained by monitoring the switching state of a protection execution switch through a switching value sensor, the operation signal is obtained by monitoring the operation state on an electric circuit through an operation monitoring sensor, and the protection execution switch is arranged on the electric circuit;
and determining whether the power consumption circuit is abnormal or not based on the switching value signal and the operation signal, and controlling the protection execution switch to perform tripping action when the power consumption circuit is abnormal.
The protection system of the power consumption line, the circuit breaker and the protection method of the power consumption line obtain the switching value signal by monitoring the switching state of the protection execution switch through the monitoring sensor, monitor the running state on the power consumption line to obtain the running signal, and determine whether the power consumption line is abnormal or not by utilizing the switching value signal and the running signal through the processing device, and control the protection execution switch to release when the power consumption line is abnormal, thereby disconnecting the power supply on the power consumption line.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram illustrating a power line protection system according to an embodiment;
fig. 2 is a schematic structural diagram of another protection system for a power line according to an embodiment;
fig. 3 is a schematic structural diagram of an analog-to-digital conversion module according to an embodiment;
fig. 4 is a schematic structural diagram of another protection system for a power line according to an embodiment;
FIG. 5 is a schematic diagram of a control module according to an embodiment;
fig. 6 is a schematic structural diagram of another protection system for a power line according to an embodiment;
fig. 7 is a flowchart illustrating a protection method for a power line according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different 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.
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.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a protection system for a power line according to an embodiment. In one embodiment, as shown in fig. 1, there is provided a protection system for a power line, on which a protection execution switch 200 is disposed, the system including a monitoring sensor 110, a signal acquisition device 120, and a processing device 130, wherein:
the monitoring sensor 110 includes a switching value sensor 111 and an operation monitoring sensor 112, the switching value sensor 111 is used for connecting with the protection execution switch 200 to monitor the switching state of the protection execution switch 200 obtains a switching value signal, the operation monitoring sensor 112 is used for connecting with the electric circuit to monitor the operation state on the electric circuit obtains an operation signal. The input end of the signal acquisition device 120 is connected to the monitoring sensor 110, and the signal acquisition device 120 is configured to acquire the switching value signal and the operation signal. The input end of the processing device 130 is connected with the output end of the signal acquisition device 120, the control end of the processing device 130 is connected with the protection execution switch 200, and the processing device 130 is used for determining whether the power line is abnormal or not based on the switching value signal and the operation signal, and controlling the protection execution switch 200 to perform tripping action when the power line is abnormal.
The signal from the switching value sensor 111 is a contact signal, and has two states of open and closed. In the present embodiment, the switching value sensor 111 monitors whether the protection execution switch 200 is in the closed state or in the open state, thereby obtaining a switching value signal. Specifically, when the protection execution switch 200 is in the closed state, the power line is normally operated, and when the protection execution switch 200 is in the open state, the power line is stopped. In the present embodiment, the operation monitoring sensor 112 is used to monitor the operation state on the power line. Optionally, the operation state includes, but is not limited to, voltage, current, temperature, and the like, and the specific operation state is not limited in this embodiment.
Specifically, the switching value sensor 111 monitors the switching state of the protection execution switch 200 in real time to obtain a switching value signal. Meanwhile, the operation monitoring sensor 112 monitors the operation state of the power line to obtain an operation signal. The signal collecting device 120 collects the switching value signal and the operation signal and then transmits the switching value signal and the operation signal to the processing device 130, and the processing device 130 determines whether the power line is abnormal or not based on the switching value signal and the operation signal. If the processing device 130 determines that the power line is abnormal, the processing device 130 controls the execution protection switch to trip, so that the power supply of the power line is cut off to protect the power line.
In this embodiment, the monitoring sensor 110 monitors the on-off state of the protection execution switch 200 to obtain the on-off signal, monitors the operation state on the power line to obtain the operation signal, and determines whether the power line is abnormal or not by using the on-off signal and the operation signal through the processing device 130, and controls the protection execution switch 200 to perform a tripping action when the power line is abnormal, so as to disconnect the power supply on the power line.
In this embodiment, how the processing device 130 determines whether an abnormality occurs in the power line using the switching value signal and the operation signal is not particularly limited. For example, when the switching value signal represents that the protection execution switch 200 is in the closed state, it may be determined whether the operation signal is greater than a correspondingly set threshold, and if the operation signal is greater than the correspondingly set threshold, it is determined that the power line is abnormal.
It can be understood that whether the power line is abnormal or not is determined by combining the switching value signal, when the switching value signal represents that the protection execution switch 200 is in the closed state, the operation signal is used for determining whether the power line is abnormal or not, and when the switching value signal represents that the protection execution switch 200 is in the open state, the abnormal determination of the power line is not required, so that the calculation resources can be saved. Further, after the protection execution switch 200 is controlled to perform the trip operation, it is also possible to determine whether or not the power supply on the power-using line is cut off by the switching amount sensor 111.
Optionally, the operation monitoring sensor 112 includes one or more. In one embodiment, the operation monitoring sensor 112 includes, but is not limited to, at least one of a voltage transformer, a current transformer, and a temperature sensor.
In this embodiment, the voltage transformer is used to monitor the voltage on the power line to obtain a voltage signal. The voltage signal is indicative of the voltage level of the utility line. The current transformer is used for monitoring the current on the power line to obtain a current signal. The current signal is indicative of the magnitude of the current in the utility line. The temperature sensor is used for monitoring the temperature of the power line to obtain a temperature signal. The temperature signal is used for indicating the temperature of the power line. It is understood that when the above-mentioned material is used, the above-mentioned material can be
Specifically, if the voltage is larger than the preset voltage, the voltage on the power line is considered to be abnormal; if the current is larger than the preset current, the current on the power line is considered to be abnormal; if the temperature is larger than the preset temperature, the temperature on the power line is considered to be abnormal.
Optionally, the monitoring sensors 110 are in one or more groups. In one embodiment, the monitoring sensors 110 are in multiple groups. The plurality of sets of monitoring sensors 110 are used for monitoring different power lines or monitoring different portions of the same power line, and are not limited herein. By arranging a plurality of groups of monitoring sensors 110, abnormal power lines can be positioned in a plurality of power lines; or locating a specific abnormal position when the power line is abnormal.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another protection system for a power line according to an embodiment. In one embodiment, as shown in fig. 2, the signal acquisition device 120 includes an analog-to-digital conversion module 121, wherein:
the input end of the analog-to-digital conversion module 121 is connected to the monitoring sensor 110, the output end of the analog-to-digital conversion module 121 is connected to the processing device 130, and the analog-to-digital conversion module 121 is configured to convert analog signals in the switching value signal and the operating signal into digital signals to obtain digital monitoring signals. The processing device 130 is used for determining whether the power circuit is abnormal or not based on the digital monitoring signal.
The digital monitoring signal refers to a set of all digital signals obtained through monitoring. Specifically, the digital monitoring signal includes a digital signal obtained by converting the analog-to-digital conversion module 121 and a monitored digital signal. For example, the switching value signal may be a digital signal, and the switching value signal has two states of 1 and 0, which represent whether the protection execution switch 200 is in the open state or the closed state. The voltage signal and the current signal are analog signals, and need to be converted by the analog-to-digital converter 1211 to obtain digital signals.
In the present embodiment, the processing device 130 determines whether an abnormality occurs in the power consumption line based on the digital monitor signal. Specifically, the processing device 130 may restore a part or all of the digital monitoring signal to an analog signal, so as to determine whether an abnormality occurs in the power line.
Optionally, the analog-to-digital conversion module 121 converts an analog signal into a digital signal, which may be used to convert one of the analog signals in a time-sharing manner, or simultaneously convert all the analog signals, and this is not limited herein. In an embodiment, the monitoring sensors 110 are multiple groups, and there is only one analog-to-digital conversion module 121, and it is necessary to convert the analog signals monitored by the multiple groups of monitoring sensors 110 through one analog-to-digital conversion module 121, so that the analog-to-digital conversion module 121 may convert the analog signals monitored by one of the multiple groups of monitoring sensors 110 in a time-sharing manner, or may convert the analog signals monitored by the multiple groups of monitoring sensors 110 at the same time, which is not limited herein.
It should be noted that the analog signal obtained by monitoring may be acquired by the analog-to-digital conversion module 121, and the digital signal obtained by monitoring may be acquired by the digital signal acquisition card, so that the digital signal acquired by the digital signal acquisition card and the digital signal obtained by conversion by the analog-to-digital conversion module 121 are collected as a digital monitoring signal and sent to the processing device 130.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an analog-to-digital conversion module 121 according to an embodiment. In one embodiment, the analog-to-digital conversion module 121 includes an analog-to-digital converter 1211, wherein:
the conversion method is a method in which the analog-to-digital converter 1211 converts a signal. Specifically, the conversion method includes, but is not limited to, the sampling rate and resolution of the analog-to-digital converter 1211 for signal conversion. According to the sampling theorem, the sampling frequency fs of the analog-to-digital converter 1211 should be greater than 2Wa (Wa is the bandwidth of the sampled signal). In practice, fs >2.5Wa is typically chosen due to the effects of non-linearity of the analog-to-digital converter 1211, quantization noise, distortion, and receiver noise. The selection of the number of bits of the sampling value needs to meet the requirements of a certain dynamic range and the processing precision of a digital part, and the number of bits cannot be lower than 12 bits under the requirement of the dynamic range of the general resolution of 80 dB.
In this embodiment, the monitoring sensor 110 is connected to an analog-to-digital converter 1211, and the channel selection register controls a transmission path between the analog-to-digital converter 1211 and the monitoring sensor 110 to be turned on or off, so as to control the analog-to-digital converter 1211 to receive an analog signal transmitted by at least one of the monitoring sensors 110, so that the analog-to-digital converter 1211 converts the received analog signal into a digital signal. Specifically, the analog-to-digital converter 1211 may receive the analog signal when the transmission path is turned on. Alternatively, when the monitoring sensors 110 are multiple groups, and the multiple groups of monitoring sensors 110 share one analog-to-digital converter 1211, the channel selection register may further control the analog-to-digital converter 1211 to receive analog signals sent by one of the multiple groups of monitoring sensors 110 in a time-sharing manner.
In this embodiment, the register controls the operating state of the analog-to-digital converter 1211, so that the analog-to-digital converter 1211 can be adjusted as required, thereby improving convenience.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another protection system for a power line according to an embodiment. In one embodiment, as shown in fig. 4, the processing device 130 includes a digital signal processor 131 and a control module 132, wherein:
the digital signal processor 131 is configured to receive the digital monitoring signal, determine whether the power consumption circuit is abnormal based on the digital monitoring signal, and generate a control command when the power consumption circuit sends an abnormality; the input end of the control module 132 is connected to the output end of the digital signal processor 131, the control end of the control module 132 is connected to the protection execution switch 200, and the control module 132 is configured to control the protection execution switch 200 to perform a trip operation after receiving a control command.
The digital signal processor 131 is a processor composed of a large-scale or very-large-scale integrated circuit chip for performing digital signal processing tasks.
Specifically, after receiving the digital monitoring signal, the processor 131 determines whether the power line is abnormal, and if it is determined that the power line is abnormal, generates a control command and sends the control command to the control module 132. After receiving the control command, the control module 132 controls the protection execution switch 200 to trip. In this embodiment, how the control module 132 controls the protection execution switch 200 to perform the trip operation is not particularly limited.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a control module 132 according to an embodiment. In one embodiment, as shown in fig. 5, the control module 132 includes a control unit 1321 and a signal amplifying unit 1322, wherein:
the input end of the control unit 1321 is connected to the output end of the digital signal processor 131, and the control unit 1321 is configured to generate a trip driving signal after receiving a control command; the input end of the signal amplifying unit 1322 is connected to the output end of the control unit 1321, the output end of the signal amplifying unit 1322 is connected to the protection execution switch 200, and the signal amplifying unit 1322 is configured to amplify the trip driving signal and then send the amplified trip driving signal to the protection execution switch 200, so as to drive the protection execution switch 200 to perform a trip operation.
In this embodiment, the trip driving signal may be a current signal. The signal amplifying unit 1322 amplifies the trip driving signal and transmits the amplified trip driving signal to the protection execution switch 200, thereby driving the protection execution switch 200 to perform a trip operation. Specifically, the protection execution switch 200 is disposed on the power line, and when the current transmitted to the protection execution switch 200 is sufficiently large, a sufficiently large electromagnetic field is generated, and the generated electromagnetic field can drive the protection execution switch 200 to perform a trip operation, thereby cutting off the power supply on the power line.
In the present embodiment, the control unit 1321 generates the trip driving signal after receiving the control command, and drives the protection execution switch 200 to perform the trip operation after the signal amplification unit 1322 amplifies the signal, so that the protection execution switch 200 can be controlled to perform the trip operation even if the control unit 1321 outputs a small current.
In one embodiment, the operation monitoring sensor 112 includes a voltage transformer and a current transformer, and the processing device 130 is further configured to determine the power utilization information of the power utilization line based on the voltage signal monitored by the voltage transformer and the current signal monitored by the current transformer.
In the present embodiment, the electricity information includes, but is not limited to, electric energy information, active power information, voltage information, current information, power factor information, and the like. Specifically, the voltage information and the current information can be directly monitored and obtained, and the electric energy information, the active power information and the power factor information can be obtained by calculating the voltage information and the current information.
This embodiment not only can protect with the electric wire way, can also measure the power consumption on with the electric wire way.
Referring to fig. 6, fig. 6 is a schematic structural diagram of another protection system for a power line according to an embodiment. In this embodiment, the operation monitoring sensor 112 includes a voltage transformer and a current transformer, and as shown in fig. 6, the system further includes at least one of a communication device 140 and a display device 150. Wherein:
the input end of the communication device 140 is connected to the output end of the processing device 130, and the communication device 140 is configured to transmit the power consumption information to the outside. The input end of the display device 150 is connected with the output end of the processing device 130, and the display device 150 is used for displaying the monitoring parameters related to the power utilization line in real time and initiating an alarm prompt when the power utilization line is abnormal.
In this embodiment, the external part is relative to the system, for example, the external part may be a server, and this embodiment is not limited. In this embodiment, the display module may adopt a liquid crystal display to implement a human-computer interaction interface and display various monitoring parameters. When the power line works normally, the working information of the power line such as voltage, current, active power, reactive power, power factor and the like can be displayed; when the power line is abnormal, abnormal information such as abnormal type, abnormal voltage, abnormal current and abnormal temperature of the power line can be displayed. The device is connected with the digital signal processor 131 in an address bus mode, a read-write signal led out from a control board of the liquid crystal display is directly connected with a data bus of the digital signal processor 131, and the external state automatic waiting is realized through hardware expansion by utilizing a Ready pin of the digital signal processor 131 in time sequence, so that the time sequence between the digital signal processor 131 and the liquid crystal display is matched.
With continued reference to fig. 6, in one embodiment, the system further includes a signal preprocessing device 160. The input end of the signal preprocessing device 160 is connected to the output end of the monitoring sensor 110, the output end of the signal preprocessing device 160 is connected to the analog-to-digital conversion module 121, and the signal preprocessing device 160 is configured to filter out non-periodic components and higher harmonics of at least one of the switching value signal and the state monitoring signal, and convert the filtered signal into a signal interval matched with the analog-to-digital conversion module 121.
In this embodiment, the signal interval matched by the analog-to-digital conversion module 121 refers to a signal interval suitable for the analog-to-digital conversion module 121 to operate. For example, the signal interval for analog-to-digital conversion matching may be a 0V-3V voltage signal. The signal interval of the present embodiment is related to the analog-to-digital conversion module 121, and the present embodiment is not limited in particular. The signal preprocessing device 160 of the present embodiment is configured to filter out non-periodic components and higher harmonics in the analog signal, and if the signal is a digital signal, the signal preprocessing device 160 is further configured to filter out noise in the digital signal. Specifically, the signal preprocessing device 160 includes an analog signal filtering module and a digital signal filtering module. The analog signal filtering module is used for filtering out non-periodic components and higher harmonics in the analog signals, and the digital signal filtering module is used for filtering out clutter in the digital signals.
In this embodiment, the signal preprocessing device 160 filters the non-periodic component and the higher harmonic of the analog signal in the switching value signal and the state monitoring signal, and then determines whether the power line is abnormal or not according to the filtered signal, so as to improve the accuracy of determination. In addition, by converting the signal into a signal interval matched with the analog-to-digital conversion module 121, the analog-to-digital conversion module 121 can be protected, and the working stability and the safety of the analog-to-digital conversion module 121 are improved.
With continued reference to FIG. 6, in one embodiment, the system optionally further includes a functionality expansion device 170. Wherein, the function expanding device 170 is connected with the digital signal processor 131, and the function expanding device 170 is used for adding a new function.
In this embodiment, when a new function needs to be added to the system, the addition is performed by the function expanding means 170. In the embodiment, the function expanding device 170 is provided as an interface for adding a new function, so that the adaptability of the system is improved.
In one embodiment, optionally, the system is further provided with an expansion interface, the expansion interface is connected with the digital signal processor 131, and the expansion interface is used as a connection medium for the new sensor.
In one embodiment, a circuit breaker is provided that includes a protection system for a power line. The protection system for the power line may refer to the description of any of the above embodiments, which is not repeated herein.
Referring to fig. 7, fig. 7 is a flowchart illustrating a protection method for a power line according to an embodiment. In one embodiment, as shown in fig. 7, there is provided a method for protecting a power line, including:
Wherein the switching value signal represents whether the protection execution switch is in an open state or a closed state. The operating signal characterizes an operating state on the power line.
And 720, determining whether the power circuit is abnormal or not based on the switching value signal and the operation signal, and controlling the protection execution switch to trip when the power circuit is abnormal.
In this step, specifically, when the switching value signal indicates that the protection execution switch is in the closed state, it is determined whether the operation state of the power line is abnormal according to the operation signal.
In an embodiment, optionally, the step of determining whether the operation state of the power line is abnormal according to the operation signal includes:
and if the operation signal is larger than the corresponding threshold value which is larger than the corresponding threshold value, determining that the electric circuit is abnormal. For example, if the voltage is greater than the preset voltage, the voltage on the power line is considered to be abnormal; if the current is larger than the preset current, the current on the power line is considered to be abnormal; if the temperature is larger than the preset temperature, the temperature on the power line is considered to be abnormal.
It should be understood that, although the steps in the flowchart of fig. 7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order 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 portion of the steps in fig. 7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
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-mentioned embodiments 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. The utility model provides a protection system with electric wire way for protect with electric wire way, be provided with the protection on the electric wire way and carry out the switch, the system includes:
the monitoring sensor comprises a switching value sensor and an operation monitoring sensor, the switching value sensor is used for being connected with the protection execution switch to monitor the switching state of the protection execution switch to obtain a switching value signal, and the operation monitoring sensor is used for being connected with the power circuit to monitor the operation state of the power circuit to obtain an operation signal;
the input end of the signal acquisition device is connected with the monitoring sensor, and the signal acquisition device is used for acquiring the switching value signal and the operation signal;
the processing device, processing device's input with signal acquisition device's output is connected, processing device's control end with the protection execution switch is connected, processing device is used for the basis the switching value signal with the running signal confirms whether the power consumption circuit takes place unusually, and control when the power consumption circuit takes place unusually the protection execution switch action of tripping.
2. The system of claim 1, wherein the operation monitoring sensor comprises at least one of a voltage transformer, a current transformer, and a temperature sensor.
3. The system of claim 1, wherein the signal acquisition device comprises:
the input end of the analog-to-digital conversion module is connected with the monitoring sensor, the output end of the analog-to-digital conversion module is connected with the processing device, and the analog-to-digital conversion module is used for converting analog signals in the switching value signal and the operation signal into digital signals to obtain digital monitoring signals;
the processing device is used for determining whether the power circuit is abnormal or not based on the digital monitoring signal.
4. The system of claim 3, wherein the analog-to-digital conversion module comprises:
the analog-to-digital converter is used for converting an analog signal into a digital signal and is provided with a control register, a state register, a channel selection register and a result register;
the control register is used for controlling the analog-to-digital converter to start conversion or stop conversion;
the state register is used for controlling a conversion mode of the analog-to-digital converter for signal conversion;
the channel selection register is used for controlling the analog-to-digital converter to receive at least one analog signal sent by the monitoring sensor;
the result register is used for storing the conversion result of the digital-to-analog converter conversion signal.
5. The system of claim 3, wherein the processing means comprises:
the digital signal processor is used for receiving the digital monitoring signal, determining whether the power circuit is abnormal or not based on the digital monitoring signal, and generating a control command when the power circuit sends the abnormality;
the input end of the control module is connected with the output end of the digital signal processor, the control end of the control module is connected with the protection execution switch, and the control module is used for controlling the protection execution switch to perform tripping action after receiving a control command.
6. The system of claim 5, wherein the control module comprises:
the input end of the control unit is connected with the output end of the digital signal processor, and the control unit is used for generating a tripping driving signal after receiving a control command;
the input end of the signal amplification unit is connected with the output end of the control unit, the output end of the signal amplification unit is connected with the protection execution switch, and the signal amplification unit is used for amplifying the tripping driving signal and then sending the tripping driving signal to the protection execution switch so as to drive the protection execution switch to trip.
7. The system of claim 5, wherein the operation monitoring sensor comprises a voltage transformer and a current transformer, the processing device is further configured to determine power usage information of the power line based on a voltage signal monitored by the voltage transformer and a current signal monitored by the current transformer, and the system further comprises:
the input end of the communication device is connected with the output end of the processing device, and the communication device is used for transmitting the electricity utilization information to the outside;
and the display device is used for displaying the monitoring parameters related to the power utilization line in real time and initiating an alarm prompt when the power utilization line is abnormal.
8. The system of claim 3, further comprising:
the input end of the signal preprocessing device is connected with the output end of the monitoring sensor, the output end of the signal preprocessing device is connected with the analog-to-digital conversion module, and the signal preprocessing device is used for filtering out non-periodic components and higher harmonics of at least one of the switching value signals and the state monitoring signals and converting the filtered signals into signal intervals matched with the analog-to-digital conversion module.
9. A circuit breaker characterized in that it comprises a protection system for electric lines according to any one of claims 1 to 8.
10. A method for protecting a power line, comprising:
acquiring a switching value signal and an operation signal acquired by a signal acquisition device, wherein the switching value signal is obtained by monitoring the switching state of a protection execution switch through a switching value sensor, the operation signal is obtained by monitoring the operation state on an electric circuit through an operation monitoring sensor, and the protection execution switch is arranged on the electric circuit;
and determining whether the power consumption circuit is abnormal or not based on the switching value signal and the operation signal, and controlling the protection execution switch to perform tripping action when the power consumption circuit is abnormal.
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| CN202011567723.1A CN112821359B (en) | 2020-12-25 | 2020-12-25 | Protection system for electric line, circuit breaker and protection method for electric line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117394290A (en) * | 2023-12-11 | 2024-01-12 | 浙江万胜智能科技股份有限公司 | Intelligent protection method and system for circuit breaker of multipath measurement data |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012186960A (en) * | 2011-03-07 | 2012-09-27 | Toshiba Corp | Monitor |
| CN205791462U (en) * | 2016-06-06 | 2016-12-07 | 国网天津市电力公司 | It is applicable to the transformator broken neutral line monitoring system of low-voltage network |
| CN106646309A (en) * | 2016-11-14 | 2017-05-10 | 国网江苏省电力公司淮安供电公司 | Precision detection device of arc light detector |
| KR20180075348A (en) * | 2016-12-26 | 2018-07-04 | 전광현 | Current monitoring board and control method thereof |
| CN208723528U (en) * | 2018-09-11 | 2019-04-09 | 湖南电气职业技术学院 | A kind of low-voltage circuit breaker intelligent controller |
| CN110535243A (en) * | 2019-09-26 | 2019-12-03 | 浙江涵普电力科技有限公司 | A kind of intelligent comprehensive protection supervisory equipment |
-
2020
- 2020-12-25 CN CN202011567723.1A patent/CN112821359B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012186960A (en) * | 2011-03-07 | 2012-09-27 | Toshiba Corp | Monitor |
| CN205791462U (en) * | 2016-06-06 | 2016-12-07 | 国网天津市电力公司 | It is applicable to the transformator broken neutral line monitoring system of low-voltage network |
| CN106646309A (en) * | 2016-11-14 | 2017-05-10 | 国网江苏省电力公司淮安供电公司 | Precision detection device of arc light detector |
| KR20180075348A (en) * | 2016-12-26 | 2018-07-04 | 전광현 | Current monitoring board and control method thereof |
| CN208723528U (en) * | 2018-09-11 | 2019-04-09 | 湖南电气职业技术学院 | A kind of low-voltage circuit breaker intelligent controller |
| CN110535243A (en) * | 2019-09-26 | 2019-12-03 | 浙江涵普电力科技有限公司 | A kind of intelligent comprehensive protection supervisory equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117394290A (en) * | 2023-12-11 | 2024-01-12 | 浙江万胜智能科技股份有限公司 | Intelligent protection method and system for circuit breaker of multipath measurement data |
| CN117394290B (en) * | 2023-12-11 | 2024-04-02 | 浙江万胜智能科技股份有限公司 | Intelligent protection method and system for circuit breaker of multipath measurement data |
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