CN115733127A - Low-voltage direct-current power distribution protection method and system, electronic equipment and storage medium - Google Patents
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Abstract
The invention provides a low-voltage direct-current power distribution protection method, a low-voltage direct-current power distribution protection system, electronic equipment and a storage medium, wherein the method comprises the following steps: acquiring analog data on a low-voltage direct-current distribution line; converting the analog data into digital data; comparing the digital data with corresponding protection setting values, wherein the digital data comprises electrical quantity and non-electrical quantity data used for judging whether the line is abnormal or not; and when the digital data is greater than the corresponding protection setting value, controlling the protection device to act. The invention solves the problems of delayed or unstable action of low-voltage direct-current distribution protection in the related technology.
Description
Technical Field
The invention relates to the technical field of relay protection, in particular to a low-voltage direct-current power distribution protection method, a low-voltage direct-current power distribution protection system, electronic equipment and a storage medium.
Background
At present, relay protection aiming at alternating current is mature, but the technology in the aspect of low-voltage direct current distribution protection is relatively single, and most of the technologies use a fast fuse as the main protection of a loop. The main advantages of using the fast fuse are low cost and stable protection. The fuse protector has the defects that the fuse protector has fewer protection functions and incomplete protection functions, the fuse protector is a disposable product, a fuse link must be replaced after a fault is fused, and the operation and maintenance cost is high due to frequent replacement. The molded case circuit breaker is also a commonly used protection device, the manual operation molded case circuit breaker is likely to have the problems that the action values caused by personnel mistaken collision, misoperation, processing, assembly errors and the like are not uniform, the remote operation molded case circuit breaker has the problems of action delay or action instability, and whether the action is successfully executed by judging protection is difficult, namely, the low-voltage direct-current power distribution protection lacks a quick control or feedback function, and the intelligent degree is low. Therefore, the prior art has the problems of delayed or unstable operation of the low-voltage direct-current distribution protection.
Disclosure of Invention
The invention provides a low-voltage direct-current power distribution protection method, a low-voltage direct-current power distribution protection system, electronic equipment and a storage medium, and solves the problem that the low-voltage direct-current power distribution protection action is delayed or unstable in action in the related technology.
According to a first aspect of the embodiments of the present invention, there is provided a low voltage dc distribution protection method, including: acquiring analog data on a low-voltage direct-current distribution line; converting the analog data to digital data; comparing the digital data with corresponding protection setting values, wherein the digital data comprises electrical quantity and non-electrical quantity data used for judging whether a line is abnormal or not; and when the digital data is greater than the corresponding protection setting value, controlling a protection device to act.
Optionally, the controlling a protection device to act when the digital data is greater than the corresponding protection setting value includes: and when the digital data is greater than the corresponding protection setting value, controlling a molded case tripping mechanism of the molded case circuit breaker to act and/or controlling an electromagnetic mechanism of the contactor to act and/or controlling the fan to start.
Optionally, the method further comprises: acquiring analog data on the low-voltage direct-current distribution line after the control protection device acts; converting the analog data after the protection device acts into digital data after the protection device acts; and comparing the digital data after the protection device acts with the digital data before the protection device acts, and judging whether the protection device acts successfully.
Optionally, the method further comprises: determining the state of the protection device on the low-voltage direct-current distribution line according to whether the protection device successfully acts; and visually displaying the state of the protection device on the low-voltage direct-current distribution line.
Optionally, the method further comprises: acquiring digital data before and after action of a protection device on a low-voltage direct-current distribution line; and storing the digital data before and after the action of the protection device, the number of the protection device and the action time of the protection device.
Optionally, the method further comprises: and calculating the digital data on the low-voltage direct-current distribution line according to a target algorithm, and predicting a fault point and a fault type on the low-voltage direct-current distribution line.
According to a second aspect of the embodiments of the present invention, there is also provided a low-voltage dc distribution protection system, including: a central control unit and a protection device; the central control unit obtains analog data on a low-voltage direct-current distribution line, converts the analog data into digital data, compares the digital data with corresponding protection setting values, and controls a protection device to act when the digital data is larger than the corresponding protection setting values, wherein the digital data comprises electric quantity data and non-electric quantity data used for judging whether the line is abnormal.
Optionally, the system further comprises: the monitoring device is installed on a low-voltage direct-current distribution line and used for acquiring analog data on the low-voltage direct-current distribution line, and the background device is used for receiving data sent by the central control unit and carrying out intelligent display according to the data; the central control unit comprises an input unit, a data processing unit, a setting value unit and an output unit, the input unit receives analog data of the monitoring device and sends the analog data to the data processing unit, the data processing unit obtains a protection setting value of the setting value unit, the analog data are converted into digital data and then are compared with the protection setting value, when the digital data are larger than the corresponding protection setting value, the output unit generates an action signal and sends the action signal to the protection device, and the protection device acts according to the action signal; the input unit acquires analog data on the low-voltage direct-current distribution line after the protection device acts; the data processing unit compares digital data before the protection device acts with digital data after the protection device acts to generate an action judgment result of the protection device, and the output unit sends the action judgment result to the background equipment.
According to a third aspect of the embodiments of the present invention, there is further provided an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus; wherein the memory is used for storing the computer program; a processor for performing the method steps in any of the above embodiments by running the computer program stored on the memory.
According to a fourth aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to perform the method steps in any of the above embodiments when the computer program is run.
In the embodiment of the invention, analog data on a low-voltage direct-current distribution line is obtained; converting the analog data into digital data; comparing the digital data with a corresponding protection setting value; and when the digital data is greater than the corresponding protection setting value, controlling the protection device to act. Because the traditional low-voltage direct-current power distribution protection is characterized in that the problem that action delay or action instability and the like are caused by machining errors of a mechanical structure can exist in the action of a protection mechanism of a protection device controlled by the mechanical structure, the method and the device can automatically control the protection device to quickly act according to a comparison result by monitoring analog data of a low-voltage direct-current power distribution line in real time, converting the analog data into high-precision digital data, quickly comparing the digital data with a corresponding protection setting value, and avoiding action delay or action instability caused by the difference of a manufacturing process of an internal action part of the protection device such as a molded case circuit breaker. For slight faults, fault parts can be accurately and quickly removed, the fault range is prevented from being enlarged, the sensitivity, reliability and rapidity of low-voltage direct-current distribution line protection actions are improved, and the problems of action delay or action instability caused by low precision of the low-voltage direct-current distribution protection actions in the related technology are solved.
In the embodiment of the invention, the analog data on the low-voltage direct-current distribution line before and after the action of the protection device are obtained for processing and comparing, whether the protection device successfully acts is judged, the action condition of the protection device is transmitted to the background for intelligent display, the feedback of low-voltage direct-current distribution protection is realized, and the intelligent degree of the protection action is improved.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic flow diagram of an alternative low-voltage dc distribution protection method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative low voltage DC distribution protection system according to an embodiment of the present invention;
fig. 3 is a block diagram of an alternative electronic device according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing similar objects, and are not necessarily used for describing a particular order or sequence. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like refer to an orientation or positional relationship that is based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
According to a first aspect of the embodiments of the present invention, there is provided a low-voltage dc distribution protection method, as shown in fig. 1, where the method is applied to a central control unit as an example, a flow of the method may include the following steps: and step S101, acquiring analog data on the low-voltage direct-current distribution line. Optionally, the analog data on the low-voltage direct-current distribution line includes electric quantity and non-electric quantity used for determining whether the line is abnormal, such as current, voltage, temperature, power, and frequency, and the acquisition of the analog data may be implemented by a data acquisition device. Step S102, converting the analog data into digital data. Optionally, the analog data obtained in step S101 is converted into digital data through sampling, quantization and encoding, wherein the conversion of the data can be realized through customized software, which improves the rapidity of the protection action. Step S103, comparing digital data with corresponding protection setting values, wherein the digital data comprises electric quantity data and non-electric quantity data used for judging whether the line is abnormal or not. Optionally, digital data obtained after the analog data processing, such as current data, voltage data, temperature data, power data, frequency data, and the like, is compared with corresponding protection setting values, such as a current setting value, a voltage setting value, a temperature setting value, a power setting value, and a frequency setting value, wherein the protection setting values are preset according to the operating structure and operating requirements of the low-voltage direct-current distribution line. And step S104, when the digital data is larger than the corresponding protection setting value, controlling the protection device to act. Optionally, when the digital data, such as the voltage data, is greater than the voltage setting value, it is considered that an abnormality occurs on the dc distribution line at this time, and the protection device on the low-voltage dc distribution line is controlled to operate.
In the embodiment of the invention, analog data on a low-voltage direct-current distribution line is obtained; converting the analog data into digital data; comparing the digital data with a corresponding protection setting value; and when the digital data is greater than the corresponding protection setting value, controlling the protection device to act. Because the traditional low-voltage direct-current power distribution protection is characterized in that the problem that action delay or action instability and the like are caused by machining errors of a mechanical structure can exist in the action of a protection mechanism of a protection device controlled by the mechanical structure, the method and the device can automatically control the protection device to quickly act according to a comparison result by monitoring analog data of a low-voltage direct-current power distribution line in real time, converting the analog data into high-precision digital data, quickly comparing the digital data with a corresponding protection setting value, and avoiding action delay or action instability caused by the difference of a manufacturing process of an internal action part of the protection device such as a molded case circuit breaker. For slight faults, fault parts can be accurately and quickly removed, the fault range is prevented from being enlarged, the sensitivity, reliability and rapidity of low-voltage direct-current distribution line protection actions are improved, and the problems of action delay or action instability caused by low precision of the low-voltage direct-current distribution protection actions in the related technology are solved.
As an alternative embodiment, when the digital data is greater than the corresponding protection setting value, the protection device is controlled to act, including: and when the digital data is greater than the corresponding protection setting value, controlling a molded case tripping mechanism of the molded case circuit breaker to act and/or controlling an electromagnetic mechanism of the contactor to act and/or controlling the fan to start. Optionally, when the current data, the voltage data or the temperature data is greater than the corresponding protection setting value, a molded case tripping mechanism of the molded case circuit breaker is controlled to act, so that the main circuit is cut off. In addition, the main loop can be cut off by controlling the action of the main loop contactor, so that the abnormal condition is prevented from spreading. When the temperature data is larger than the temperature setting value, the fan can be started to radiate. The actions of the protection devices can be combined according to the actual fault condition.
As an alternative embodiment, the method further comprises: acquiring analog data on the low-voltage direct-current distribution line after the control protection device acts; converting the analog data after the protection device acts into digital data after the protection device acts; and comparing the digital data after the protection device acts with the digital data before the protection device acts, and judging whether the protection device acts successfully. Optionally, after the protection device is controlled to operate, analog data on the low-voltage direct-current distribution line after the protection device operates are obtained, the data are converted through the central control unit, then the converted digital data are compared with digital data before the protection device operates, and whether the protection device successfully operates is judged according to the change trend of the digital data before and after the protection device operates. In the embodiment of the invention, the analog data on the low-voltage direct-current distribution line before and after the action of the protection device are obtained for processing and comparing to judge whether the protection device successfully acts, so that the control feedback of the low-voltage direct-current distribution protection is realized, and the intelligent degree of the protection action is improved.
As an alternative embodiment, the method further comprises: determining the state of the protection device on the low-voltage direct-current distribution line according to whether the protection device successfully acts; and visually displaying the state of the protection device on the low-voltage direct-current distribution line. Optionally, the state of the protection device is determined according to whether the protection device on the low-voltage direct-current distribution line successfully acts, and if the direct-current circuit breaker on the low-voltage direct-current distribution line is controlled to act, the direct-current circuit breaker is judged to successfully act according to data before and after the direct-current circuit breaker acts, and the direct-current circuit breaker is in a disconnection state at the moment. Whether the protection device successfully acts and the state after the protection device acts are sent to the background, the current state of each protection device on the low-voltage direct-current distribution line is visually displayed on the background, alarm information can be given to the protection device which does not successfully act, and the monitoring of the background by workers is facilitated. In the embodiment of the invention, the action condition of the protection device is transmitted to the background to be intelligently displayed, so that the monitoring of the state of the protection device is realized, and the intelligent degree of the protection action is further improved.
As an alternative embodiment, the method further comprises: acquiring digital data before and after action of a protection device on a low-voltage direct-current distribution line; the digital data before and after the protection device is operated, the number of the protection device and the operation time of the protection device are stored. Optionally, the information related to the action of the low-voltage direct-current distribution line protection device is stored, so that the historical fault information is traced. The information related to the action of the protection device comprises digital data on the low-voltage direct-current distribution line before and after the action of the protection device, the number of the protection device executing the action and the action time of the protection device.
As an alternative embodiment, the method further comprises: and calculating the digital data on the low-voltage direct-current distribution line according to a target algorithm, and predicting a fault point and a fault type on the low-voltage direct-current distribution line. Optionally, digital data such as voltage data, current data, and temperature data on the low-voltage dc distribution line are acquired in real time, and multidimensional data such as current data, voltage data, temperature data, power data, and frequency data are transformed into a set of representations linearly independent of each dimension by a high-dimensional data dimensionality reduction algorithm, such as Principal Component Analysis (PCA), to extract the Principal feature Component. And then inputting the extracted main characteristic components into a pre-established machine learning model, and outputting fault points and fault types on the low-voltage direct-current distribution line.
According to a second aspect of the embodiment of the invention, a low-voltage direct-current power distribution protection system is further provided. The system comprises: a central control unit and a protection device; the central control unit obtains analog data on the low-voltage direct-current distribution line, converts the analog data into digital data, compares the digital data with a corresponding protection setting value, and controls the protection device to act when the digital data is larger than the corresponding protection setting value, wherein the digital data comprises electric quantity data and non-electric quantity data used for judging whether the line is abnormal or not. Optionally, the central control unit converts analog data on the low-voltage direct-current distribution line into digital data, compares the digital data with the corresponding protection setting value, and controls the protection device to operate if some digital data is greater than the corresponding protection setting value. The digital data includes data for determining whether or not an abnormality occurs in the line, such as current data, voltage data, temperature data, power data, and frequency data on the low-voltage dc distribution line, and the protection device includes a device for disconnecting a main circuit, such as a dc breaker and a contactor, on the low-voltage dc distribution line.
In the embodiment of the invention, because the traditional low-voltage direct-current distribution protection has the problem that the action 5 is delayed or unstable due to the machining error of the mechanical structure because the action of a protection mechanism of a protection device is controlled by the mechanical structure, the analog data of the low-voltage direct-current distribution line is monitored in real time, the analog data is converted into high-precision digital data, the digital data is rapidly compared with the corresponding protection setting value, and finally the protection device is automatically controlled to rapidly act according to the comparison result, so that the action delay or the action instability of the protection device such as an internal action part of a molded case circuit breaker due to the difference of the manufacturing process is avoided. For slight faults, fault parts can be accurately and quickly removed, the fault range is prevented from being enlarged, the sensitivity, reliability and rapidity of low-voltage direct-current distribution line protection actions are improved, and the problems of action delay or action instability caused by low precision of the low-voltage direct-current distribution protection actions in the related technology are solved.
As an alternative embodiment, the system further comprises: the monitoring device is arranged on the low-voltage direct-current distribution line and used for acquiring analog data on the low-voltage direct-current distribution line, and the background equipment is used for receiving data sent by the central control unit and carrying out intelligent display according to the data; the central control unit comprises an input unit, a data processing unit, a setting value unit and an output unit, wherein the input unit receives analog data of the monitoring device and sends the analog data to the data processing unit, the data processing unit acquires a protection setting value of the setting value unit, the analog data is converted into digital data and then is compared with the protection setting value, when the digital data is larger than the corresponding protection setting value, the output unit generates an action signal and sends the action signal to the protection device, and the protection device acts according to the action signal; the input unit acquires analog data on the low-voltage direct-current distribution line after the protection device acts; the data processing unit compares the digital data before the action of the protection device with the digital data after the action of the protection device to generate an action judgment result of the protection device, and the output unit sends the action judgment result to the background equipment.
Alternatively, as shown in fig. 2, the monitoring device obtains analog data on the low-voltage direct-current distribution line and sends the analog data to the input unit of the central control unit, the data processing unit of the central control unit receives the analog data of the input unit and the protection setting value of the setting value unit, the analog data is converted into high-precision digital data and then is compared with the protection setting value, the output unit generates an action signal according to the comparison result between the digital data and the protection setting value and sends the action signal to the protection device, specifically, the output unit can send the action signal to the execution unit of the protection device, and the execution unit drives the protection device to execute corresponding action. It should be noted that the setting unit may further perform calculation on a protection setting according to the operating structure and the operating requirement of the low-voltage direct-current distribution line, and the protection actions that the execution unit may perform include: the main loop contactor is controlled to be switched off, a molded case tripping mechanism of the molded case circuit breaker is controlled to act, and the fan is started to radiate. After the protection device acts, the monitoring device collects analog data on the low-voltage direct-current distribution line after the protection device acts, the data processing unit compares digital data after the protection device acts with digital data before the protection device acts, whether the protection device acts successfully or not is judged according to the change trend of the digital data before and after the protection device acts, an action judgment result is generated, and the action judgment result is sent to the background equipment through the output unit. The background equipment visually displays the current state of each protection device on the low-voltage direct-current distribution line according to the received action judgment result, and is convenient for workers to monitor the background.
According to a third aspect of the embodiments of the present invention, there is also provided an electronic device for implementing the low-voltage dc power distribution protection method, where the electronic device may be a server, a terminal, or a combination thereof.
Fig. 3 is a block diagram of an alternative electronic device according to an embodiment of the present invention, as shown in fig. 3, including a processor 301, a communication interface 302, a memory 303 and a communication bus 304, where the processor 301, the communication interface 302 and the memory 303 complete communication with each other through the communication bus 304, and the memory 303 is used for storing a computer program; the processor 301, when executing the computer program stored in the memory 303, implements the following steps:
acquiring analog data on a low-voltage direct-current distribution line; converting the analog data into digital data; comparing digital data with corresponding protection setting values, wherein the digital data comprises electrical quantity data and non-electrical quantity data which are used for judging whether a line is abnormal or not; and when the digital data is greater than the corresponding protection setting value, controlling the protection device to act.
Alternatively, in this embodiment, the communication bus may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry Standard Architecture) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 3, but this does not mean only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The memory may include RAM, and may also include non-volatile memory, such as at least one disk memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The processor may be a general-purpose processor, and may include but is not limited to: a CPU (Central Processing Unit), an NP (Network Processor), and the like; but also a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In addition, the electronic device further includes: and the display is used for displaying the low-voltage direct-current distribution protection result.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment is not described herein again.
It can be understood by those skilled in the art that the structure shown in fig. 3 is only an illustration, and the device implementing the low-voltage dc power distribution protection method may be a terminal device, and the terminal device may be a terminal device such as a smart phone (e.g., an Android phone, an iOS phone, etc.), a tablet computer, a palm computer, a Mobile Internet Device (MID), a PAD, a dedicated device, and the like. Fig. 3 does not limit the structure of the electronic device. For example, the terminal device may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in FIG. 3, or have a different configuration than shown in FIG. 3.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by a program instructing hardware associated with the terminal device, where the program may be stored in a computer-readable storage medium, and the storage medium may include: flash disk, ROM, RAM, magnetic or optical disk, and the like.
According to a fourth aspect of the embodiments of the present invention, there is also provided a storage medium. Alternatively, in this embodiment, the storage medium may be a program code for executing the low-voltage dc distribution protection method.
Optionally, in this embodiment, the storage medium may be located on at least one of a plurality of network devices in a network shown in the embodiment.
Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:
acquiring analog data on a low-voltage direct-current distribution line; converting the analog data into digital data; comparing digital data with corresponding protection setting values, wherein the digital data comprises electrical quantity data and non-electrical quantity data which are used for judging whether a line is abnormal or not; and when the digital data is greater than the corresponding protection setting value, controlling the protection device to act.
Optionally, the specific example in this embodiment may refer to the example described in the above embodiment, which is not described again in this embodiment.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a U disk, a ROM, a RAM, a removable hard disk, a magnetic disk, or an optical disk.
According to yet another aspect of an embodiment of the present invention, there is also provided a computer program product or a computer program comprising computer instructions stored in a computer-readable storage medium; the processor of the computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to make the computer device execute the steps of the low-voltage direct-current power distribution protection method in any one of the embodiments.
The above-mentioned serial numbers of the embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The integrated unit in the above embodiments, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in the above computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing one or more computer devices (which may be personal computers, servers, or network devices) to execute all or part of the steps of the low-voltage direct-current power distribution protection method according to the embodiments of the present invention.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed client can be implemented in other manners. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, and may also be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution provided in the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (10)
1. A low voltage dc power distribution protection method, the method comprising:
acquiring analog data on a low-voltage direct-current distribution line;
converting the analog data to digital data;
comparing the digital data with corresponding protection setting values, wherein the digital data comprises electrical quantity and non-electrical quantity data used for judging whether a line is abnormal or not;
and when the digital data is greater than the corresponding protection setting value, controlling a protection device to act.
2. The low-voltage direct-current power distribution protection method according to claim 1, wherein when the digital data is larger than the corresponding protection setting value, controlling a protection device to act comprises:
and when the digital data is greater than the corresponding protection setting value, controlling a molded case tripping mechanism of the molded case circuit breaker to act and/or controlling an electromagnetic mechanism of the contactor to act and/or controlling the fan to start.
3. The low voltage dc power distribution protection method of claim 1, further comprising:
acquiring analog data on the low-voltage direct-current distribution line after the control protection device acts;
converting the analog data after the protection device acts into digital data after the protection device acts;
and comparing the digital data after the protection device acts with the digital data before the protection device acts, and judging whether the protection device acts successfully.
4. The low voltage dc distribution protection method of claim 3, further comprising:
determining the state of the protection device on the low-voltage direct-current distribution line according to whether the protection device successfully acts;
and visually displaying the state of the protection device on the low-voltage direct-current distribution line.
5. The low voltage dc power distribution protection method of claim 1, further comprising:
acquiring digital data before and after action of a protection device on a low-voltage direct-current distribution line;
and storing the digital data before and after the action of the protection device, the number of the protection device and the action time of the protection device.
6. The low voltage dc distribution protection method of claim 1, further comprising:
and calculating the digital data on the low-voltage direct-current distribution line according to a target algorithm, and predicting a fault point and a fault type on the low-voltage direct-current distribution line.
7. A low voltage dc distribution protection system, the system comprising: a central control unit and a protection device;
the central control unit obtains analog data on a low-voltage direct-current distribution line, converts the analog data into digital data, compares the digital data with corresponding protection setting values, and controls a protection device to act when the digital data is larger than the corresponding protection setting values, wherein the digital data comprises electric quantity data and non-electric quantity data used for judging whether the line is abnormal.
8. The low voltage dc distribution protection system of claim 7, further comprising: the monitoring device is installed on a low-voltage direct-current distribution line and used for acquiring analog data on the low-voltage direct-current distribution line, and the background device is used for receiving data sent by the central control unit and carrying out intelligent display according to the data;
the central control unit comprises an input unit, a data processing unit, a setting value unit and an output unit, the input unit receives analog data of the monitoring device and sends the analog data to the data processing unit, the data processing unit obtains a protection setting value of the setting value unit, the analog data are converted into digital data and then are compared with the protection setting value, when the digital data are larger than the corresponding protection setting value, the output unit generates an action signal and sends the action signal to the protection device, and the protection device acts according to the action signal; the input unit acquires analog data on the low-voltage direct-current distribution line after the protection device acts; the data processing unit compares digital data before the protection device acts with digital data after the protection device acts to generate an action judgment result of the protection device, and the output unit sends the action judgment result to the background equipment.
9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein said processor, said communication interface and said memory communicate with each other via said communication bus,
the memory for storing a computer program;
the processor for performing the method steps of any one of claims 1 to 6 by running the computer program stored on the memory.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method steps of any one of claims 1 to 6.
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