Direct current system and direct current communication method

Abstract

The invention provides a direct current system and a direct current communication method. The direct current system comprises a plurality of charging cabinets, a data transmission module and a direct current communication module. The plurality of charging cabinets are connected with the DC communication module through the data transmission module. Communication data of the plurality of charging cabinets are uploaded in parallel through the data transmission module, so that the communication data uploaded in parallel are sent to the DC communication module. In the embodiment of the invention, the data transmission module is additionally arranged between the charging cabinet without the communication module and the direct current communication module, so that the data communication data detected by the charging cabinet is collected and directly sent to the direct current communication module, and a subsequent user can check the data conveniently. Therefore, the problem of inaccurate direct-current data transmission caused by communication numerical value attenuation caused by a plurality of communication modules is avoided.

Description

Technical Field

[0001] The present invention relates to the field of charging processing technology, and in particular to a direct current system and a direct current communication method. Background Art

[0002] The DC system plays a vital role in power plants. It mainly provides reliable DC power for control signals, relay protection, automatic devices, circuit breaker tripping and closing operations, etc.

[0003] When the charging cabinet in the DC system detects DC data, it is first sent to multiple communication modules such as the charging cabinet communication module connected to the charging cabinet, the DC system insulation monitoring device communication module, and the DC section total communication module for upload, so that users can view the corresponding DC data; since each charging cabinet is connected to multiple communication modules, the DC data needs to be transmitted through multiple communication modules, and the DC data is prone to communication value attenuation during the transmission process, which leads to inaccurate DC data transmission. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a DC system and a DC communication method to solve the problem of communication value attenuation in the prior art, which leads to inaccurate DC data transmission.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A first aspect of an embodiment of the present invention shows a DC system, the DC system comprising a plurality of charging cabinets, a data transmission module and a DC communication module;

[0007] The multiple charging cabinets are all connected to the DC communication module via the data transmission module;

[0008] The communication data of the multiple charging cabinets are uploaded in parallel through the data transmission module, so as to send the communication data uploaded in parallel to the DC communication module.

[0009] Optionally, a preset communication protocol is provided in the charging cabinet, wherein the preset communication protocol has the function of uploading data in parallel.

[0010] Optionally, the data transmission module is a cable;

[0011] One end of the cable connects the output end of each charging cabinet in parallel, and the other end is connected to the DC communication module;

[0012] When the charging cabinet detects the communication data, the communication data is sent to the DC communication module through a cable according to a preset communication protocol.

[0013] Optionally, the DC communication module includes a receiving module and a conversion and sending module;

[0014] The receiving module is connected to the data transmission module, and the receiving module is connected to the conversion and transmission module;

[0015] The receiving module receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module;

[0016] The conversion and sending module converts the communication data into a data signal.

[0017] Optionally, the DC system further includes a thermal communication card;

[0018] The thermal communication card is connected to the output end of the DC communication module;

[0019] The thermal communication card receives the data signal uploaded by the DC communication module, and converts the data signal to obtain communication data.

[0020] Optionally, the DC system also includes a distributed control DCS system;

[0021] The DCS system is connected to the thermal communication card;

[0022] The DCS system receives the communication data sent by the thermal communication card and displays it for the user to view.

[0023] Optionally, the data transmission module includes a parallel uploading module and a collection module;

[0024] The input end of the collection module is connected to the plurality of charging cabinets, the output end of the collection module is connected to the input end of the parallel upload module, and the output end of the parallel upload module is connected to the DC communication module;

[0025] The collection module receives the communication data collected by the plurality of charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module;

[0026] The parallel upload module uploads the collected communication data in parallel to the DC communication module.

[0027] The second aspect of the embodiment of the present invention shows a DC communication method, which is applied to the DC system shown in the first aspect of the embodiment of the present invention, wherein the DC system includes a plurality of charging cabinets, a data transmission module and a DC communication module; the method includes:

[0028] For each charging cabinet, the charging cabinet determines whether communication data is detected;

[0029] If at least two charging cabinets detect communication data, the charging cabinets upload the detected communication data in parallel through the data transmission module, and send the parallel uploaded communication data to the DC communication module.

[0030] Optionally, the DC communication module includes a receiving module and a conversion and sending module; the method includes:

[0031] The receiving module receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module;

[0032] The conversion and sending module converts the communication data into a data signal.

[0033] Optionally, the data transmission module includes a parallel uploading module and a collection module; the method further includes:

[0034] The collection module receives the communication data collected by the plurality of charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module;

[0035] The parallel upload module uploads the collected communication data in parallel to the DC communication module.

[0036] Based on the above-mentioned embodiment of the present invention, a DC system and a DC communication method are provided, the DC system includes multiple charging cabinets, a data transmission module and a DC communication module; the multiple charging cabinets are connected to the DC communication module through the data transmission module; the communication data of the multiple charging cabinets are uploaded in parallel through the data transmission module, so as to send the communication data uploaded in parallel to the DC communication module. In an embodiment of the present invention, a data transmission module is added between a charging cabinet where no communication module exists and a DC communication module, so that the data communication data detected by the charging cabinet is collected and sent directly to the DC communication module for subsequent user viewing. Thereby avoiding the problem of inaccurate DC data transmission caused by the attenuation of communication values ​​caused by multiple communication modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0038] Figure 1 An architecture diagram of a DC system shown in an embodiment of the present invention;

[0039] Figure 2This is a structural diagram of another DC system according to an embodiment of the present invention;

[0040] Figure 3 This is a structural diagram of another DC system according to an embodiment of the present invention;

[0041] Figure 4 This is a structural diagram of another DC system according to an embodiment of the present invention;

[0042] Figure 5 This is a structural diagram of another DC system according to an embodiment of the present invention;

[0043] Figure 6 An exemplary diagram of a DC system according to an embodiment of the present invention;

[0044] Figure 7 This is a structural diagram of another DC system according to an embodiment of the present invention;

[0045] Figure 8 The figure is a flow chart of a DC communication method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0048] It should be noted that the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0050] From the background technology, it can be known that when the charging cabinet in the DC system detects DC data, it is first sent to multiple communication modules such as the DC system insulation monitoring device communication module connected to the charging cabinet and the DC section total communication module for upload, so that users can view the corresponding DC data; since each charging cabinet is connected to multiple communication modules, the DC data needs to pass through multiple communication modules, and the communication value of the DC data is attenuated during the transmission process, resulting in inaccurate DC data transmission, which in turn makes it impossible for operating personnel to quickly discover faults, which may cause the equipment to operate in a long-term fault state, and serious risks such as misoperation of protection may occur.

[0051] See also Figure 1 , is an architecture diagram of a DC system shown in an embodiment of the present invention, the DC system includes: a plurality of charging cabinets 101, a data transmission module 102 and a DC communication module 103;

[0052] The multiple charging cabinets 101 are connected to the DC communication module 103 via the data transmission module 102;

[0053] The communication data of the multiple charging cabinets 101 are uploaded in parallel through the data transmission module 102 , and the communication data uploaded in parallel are uploaded through the DC communication module 103 .

[0054] It should be noted that the number of the plurality of charging cabinets 101 is greater than or equal to 2, which represents the number of charging cabinets in a DC system of a unit.

[0055] The charging cabinet 101 shown in the embodiment of the present invention does not have a communication module.

[0056] For each charging cabinet 101, the processor in the charging cabinet 101 detects whether there is a fault state in itself. If it is determined that the charging cabinet detects a fault state corresponding to any fault type, the fault state is used as communication data.

[0057] Specifically, the processor in the charging cabinet 101 detects whether there is a fault state in itself. If so, it determines the fault type corresponding to the fault state, and then uses the fault state corresponding to any detected fault type as communication data.

[0058] It should be noted that the corresponding relationship between the fault type and the fault status is pre-stored in the charging cabinet 101.

[0059] Each charging cabinet 101 that detects a fault state sends its own communication data to the data transmission module 102, so that the data transmission module 102 collects the data and sends them in parallel to the DC communication module 103 for uploading.

[0060] It should be noted that the fault types include a total DC system fault, an AC power supply 1 fault, and an AC power supply 2 fault.

[0061] In an embodiment of the present invention, a data transmission module is added between a charging cabinet where no communication module exists and a DC communication module, so that the data communication data detected by the charging cabinet is collected and sent directly to the DC communication module for subsequent user viewing. This avoids the attenuation of communication values ​​caused by multiple communication modules, so as to improve the accuracy and stability of DC data, that is, communication data. Furthermore, since the charging cabinet can query the fault status corresponding to a variety of fault types, it is convenient to accurately determine the cause of the fault when a fault occurs, take emergency measures in time, and ensure the safe and stable operation of the DC system.

[0062] Optionally, based on the DC system shown in the above embodiment of the present invention, the embodiment of the present invention further discloses a specific structure of the data transmission module 102 in a specific implementation, such as Figure 2 As shown, the charging cabinet 101 is provided with a preset communication protocol; the data transmission module 102 is a cable 1021;

[0063] One end of the cable 1021 connects the output end of each charging cabinet 101 in parallel, and the other end is connected to the DC communication module 103;

[0064] Specifically, multiple charging cabinets 101 are connected in parallel to the same cable 1021 , and each charging cabinet 101 can independently send and receive data through the cable 1021 ; and is connected to the DC communication module 103 through the cable 1021 .

[0065] When the charging cabinet 101 detects the communication data, the communication data is sent to the DC communication module 103 through the cable 1021 according to the preset communication protocol.

[0066] Specifically, each charging cabinet 101 that detects a fault state sends its own communication data to the DC communication module through the cable 1021 according to the preset communication protocol, and uploads it to the DC communication module 103.

[0067] The preset communication protocol shown in the present invention has the function of parallel uploading. It is a serial bus communication protocol with balanced transmission and differential reception, and can connect cables 1021 with more than two cores.

[0068] It should be noted that when each charging cabinet 101 has a preset communication protocol, the charging cabinets 101 can independently upload the communication data detected by themselves, or multiple charging cabinets can directly upload communication data to reduce the use of communication modules, thereby avoiding inaccurate communication data.

[0069] The preset communication protocol with the parallel upload function shown in this application may be the 485 communication protocol.

[0070] It uses two wires for communication, has the ability to suppress common-mode interference, and is suitable for short-distance transmission, long-distance and high-speed communication.

[0071] In the embodiment of the present invention, a cable is set between the charging cabinet without a communication module and the DC communication module, and a preset communication protocol with the function of parallel data upload is set in each charging cabinet; the communication data is uploaded to the DC communication module through the cable according to the preset communication protocol. So that subsequent users can view it. In this way, the attenuation of communication values ​​caused by multiple communication modules is avoided, so as to improve the accuracy and stability of DC data, that is, communication data.

[0072] Optionally, based on the DC system shown in the above embodiment of the present invention, the embodiment of the present invention further discloses a specific structure of the DC communication module 103 in a specific implementation, such as Figure 3 As shown, the DC communication module includes a receiving module 1031 and a conversion and sending module 1032;

[0073] The receiving module 1031 is connected to the data transmission module 102 , and the receiving module 1031 is connected to the conversion and sending module 1032 .

[0074] Optionally, if the data transmission module 102 is a cable 1021 , the receiving module 1031 is connected via the cable 1021 , and the output end of the receiving module 1031 is connected to the access end of the conversion and sending module 1032 .

[0075] The receiving module 1031 receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module 1032;

[0076] The conversion and sending module 1032 converts the communication data into a data signal.

[0077] Specifically, the receiving module 1031 receives the communication data uploaded in parallel by multiple charging cabinets 101, and sends the communication data uploaded in parallel to the conversion and sending module 1032; the conversion and sending module 1032 encodes the communication data for each communication data, and converts it into a data signal that can be directly transmitted; then, the data signal corresponding to each communication data is summarized for subsequent decoding and viewing.

[0078] It should be noted that the encoded data signal may be a signal in a code format.

[0079] Optionally, based on the DC system shown in the above embodiment of the present invention, the DC system further includes a thermal communication card 104, such as Figure 4 shown.

[0080] The thermal communication card 104 is connected to the output end of the DC communication module 103;

[0081] Specifically, the thermal communication card 104 is connected to the output end of the conversion and transmission module 1032 in the DC communication module 103 .

[0082] Optionally, the conversion and sending module 1032 aggregates the data signals corresponding to each communication data, and sends the aggregated data signals to the thermal communication card 104 .

[0083] The thermal communication card 104 receives the data signal uploaded by the DC communication module 103 and converts the data signal to obtain communication data.

[0084] Specifically, according to the decoding method corresponding to the encoding, the data signal uploaded by the DC communication module 103 is decoded in sequence to obtain communication data.

[0085] The communication data includes communication data uploaded by at least one charging cabinet 101 .

[0086] It should be noted that the thermal communication card 104 is a fixed component in the DC system, which is used to convert data signals and can avoid the influence of noise voltage on communication data.

[0087] The thermal communication card 104 is used to receive data signals and decode the received data signals to obtain communication data that can be viewed by the user.

[0088] In an embodiment of the present invention, a thermal communication card connected to the DC communication module is provided after the DC communication module; when data is transmitted over long distances, the DC communication module converts the communication data into a data signal that can be safely transmitted over long distances, and transmits the data to the thermal communication card, so that the thermal communication card converts the received data signal to obtain complete and accurate communication data; so that subsequent operation and maintenance personnel can accurately read the communication data.

[0089] Optionally, based on the DC system shown in the above embodiment of the present invention, the thermal communication card 104 is also used for:

[0090] The voltage signal generated when the DC communication module 103 and the thermal communication card 104 transmit data signals is obtained.

[0091] The voltage signal is converted into a current signal.

[0092] In the present application, during the data signal transmission between the DC communication module 103 and the thermal communication card 104 , a voltage signal that affects the magnetic field of the power plant is generated.

[0093] It should be noted that, since the current signal will not affect the operation of the magnetic field when the power plant is working, the generated voltage signal needs to be converted into a current signal.

[0094] Specifically, the thermal communication card 104 is often used to convert a voltage signal into a current signal so as to eliminate interference to the data signal during distance transmission.

[0095] In the embodiment of the present invention, the thermal communication card 104 is also used to convert the voltage signal generated during the data signal transmission process, so as to eliminate the interference of the data signal during the distance transmission.

[0096] Optionally, based on the DC system shown in the above embodiment of the present invention, as Figure 5 As shown, the DC system also includes a DCS system 105;

[0097] The distributed control DCS system 105 is connected to the thermal communication card 104;

[0098] The DCS system 105 receives the communication data sent by the thermal communication card 104 based on the current signal, and displays it for the user to view.

[0099] Optionally, the thermal communication card 104 sends the converted communication data to the DCS system 105 based on the current signal;

[0100] The DCS system 105 displays the received communication information for the user to view.

[0101] It should be noted that the DCS system 105 is a new generation of instrument control system based on microprocessors, which realizes the monitoring and control of the on-site conditions of the power plant.

[0102] In order to better understand the DC system shown in the above embodiment of the present invention, the present invention also shows an example diagram of the DC system, such as Figure 6 shown.

[0103] Assume that the charging cabinet 101 includes a section I DC charging cabinet and a section II DC charging cabinet, a cable 1021, a DC communication module 103, a thermal communication card 104 and a DCS system 105;

[0104] If the DC charging cabinet of section I detects a fault in AC power 1, and the DC charging cabinet of section II detects a fault in AC power 2, the DC charging cabinet of section I will detect the fault in AC power 1 as communication data 1, and the DC charging cabinet of section II will detect the fault in AC power 2 as communication data 2;

[0105] The DC charging cabinet of section I sends the communication data 1 to the DC communication module 103 through the cable 1021 according to the preset communication protocol;

[0106] Next, when transmitting data over long distances, the DC communication module converts the communication data 1 and communication data 2 into a data signal a that can be safely transmitted over long distances, and transmits it to the thermal communication card, so that the thermal communication card can convert the received data signal a to obtain complete and accurate communication data 1 and communication data 2; finally, the complete and accurate communication data 1 and communication data 2 are displayed through the DCS system, thereby providing reliable protection for the operation and maintenance personnel to judge the accident.

[0107] The cable 1021 may be a 485 data cable.

[0108] In an embodiment of the present invention, a cable is set between a charging cabinet where no communication module exists and a DC communication module, and a preset communication protocol with the function of uploading data in parallel is set in each charging cabinet; the communication data is uploaded to the DC communication module through the cable according to the preset communication protocol. Then, when the data is transmitted over a long distance, the DC communication module converts the communication data into a data signal that can be safely transmitted over a long distance, and transmits it to the thermal communication card component, so that the thermal communication card component converts the received data signal to obtain complete and accurate communication data; finally, the complete and accurate communication data is displayed through the DCS system, so that subsequent operation and maintenance personnel can accurately read the communication data. Thereby avoiding the attenuation of communication values ​​caused by multiple communication modules, so as to improve the accuracy and stability of DC data, that is, communication data.

[0109] Optionally, in combination with the DC system shown in the above embodiment of the present invention, the embodiment of the present invention further shows another data transmission module 102, such as Figure 7 As shown, the specific structure of the data transmission module 102 is shown.

[0110] The data transmission module 102 includes a parallel upload module 1022 and a collection module 1023;

[0111] The input end 1023 of the collection module is connected to the plurality of charging cabinets 101, the output end of the collection module 1023 is connected to the input end of the parallel upload module 1022, and the output end of the parallel upload module 1022 is connected to the DC communication module 103;

[0112] The collection module 1023 receives the communication data collected by the plurality of charging cabinets 101, collects the communication data, and sends the collected communication data to the parallel upload module 1022;

[0113] The parallel uploading module 1022 uploads the collected communication data in parallel to the DC communication module.

[0114] It should be noted that at this time, there is no preset communication protocol in the charging cabinet 101.

[0115] Specifically, the input end 1023 of the collection module is connected to the communication interface of each charging cabinet 101, the output end of the collection module 1023 is connected to the input end of the parallel upload module 1022, and the output end of the parallel upload module 1022 is connected to the DC communication module 103;

[0116] The collection module 1022 receives the communication data sent through the communication interface by each charging cabinet 101 that detects a fault state; collects the communication data and then sends it to the parallel upload module 1022; the parallel upload module 1022 uploads the collected communication data in parallel to the DC communication module 103.

[0117] In an embodiment of the present invention, a data transmission module is provided between the charging cabinet and the DC communication module. The collection module in the data transmission module receives the communication data collected by the multiple charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module in the data transmission module; so that the parallel upload module uploads the collected communication data in parallel to the DC communication module. For subsequent users to view. This avoids the attenuation of communication values ​​caused by multiple communication modules, so as to improve the accuracy and stability of DC data, that is, communication data.

[0118] Based on the DC system shown in the above embodiment of the present invention, the corresponding embodiment of the present invention also shows a DC communication method, which is applied to the DC system shown in the above embodiment of the present invention, such as Figure 8 Said method comprises:

[0119] Step S801: For each charging cabinet, the charging cabinet determines whether communication data is detected. If detected, it is recorded. If at least two charging cabinets detect communication data, step S802 is executed. If not, it returns to continue detection.

[0120] In the process of implementing step S801, for each charging cabinet, the processor in the charging cabinet detects whether there is a fault state within a preset time interval. If so, the fault type corresponding to the fault state is determined, and then the fault state corresponding to any detected fault type is used as communication data, and the charging cabinets that detect communication data within the preset time interval are counted. Generally, at least two charging cabinets detect communication data within the preset time interval, and then step S802 is executed. If not, it returns to continue fault detection at the next preset time interval.

[0121] Step S802: the charging cabinet uploads the detected communication data in parallel through the data transmission module, and sends the parallel uploaded communication data to the DC communication module.

[0122] In the specific implementation of step S802, each charging cabinet that detects a fault state sends its own communication data to the data transmission module, so that the data transmission module collects the data and sends them in parallel to the DC communication module for uploading.

[0123] It should be noted that the fault types include a total DC system fault, an AC power supply 1 fault, and an AC power supply 2 fault.

[0124] Optionally, a preset communication protocol is provided in the charging cabinet, wherein the preset communication protocol has the function of uploading data in parallel.

[0125] Optionally, the data transmission module is a cable;

[0126] Specifically, when the charging cabinet detects the communication data, the communication data is sent to the DC communication module through a cable according to a preset communication protocol.

[0127] In an embodiment of the present invention, a data transmission module is added between a charging cabinet where no communication module exists and a DC communication module, so that the data communication data detected by the charging cabinet is collected and sent directly to the DC communication module for subsequent user viewing. This avoids the attenuation of communication values ​​caused by multiple communication modules, so as to improve the accuracy and stability of DC data, that is, communication data. Furthermore, since the charging cabinet can query the fault status corresponding to a variety of fault types, it is convenient to accurately determine the cause of the fault when a fault occurs, take emergency measures in time, and ensure the safe and stable operation of the DC system.

[0128] Optionally, based on the DC communication method shown in the above embodiment of the present invention, the DC communication module includes a receiving module and a conversion and sending module; the method further includes:

[0129] The receiving module receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module;

[0130] The conversion and sending module converts the communication data into a data signal.

[0131] Specifically, the receiving module receives the communication data uploaded in parallel by multiple charging cabinets, and sends the communication data uploaded in parallel to the conversion and sending module; the conversion and sending module encodes the communication data for each communication data, and converts it into a data signal that can be directly transmitted; then, the data signal corresponding to each communication data is summarized for subsequent decoding and viewing.

[0132] It should be noted that the encoded data signal may be a signal in a code format.

[0133] Optionally, based on the DC communication method shown in the above embodiment of the present invention, the DC system further includes a thermal communication card; the method further includes:

[0134] The thermal communication card receives the data signal uploaded by the DC communication module, and converts the data signal to obtain communication data.

[0135] Specifically, according to a decoding method corresponding to the encoding, the data signal uploaded by the DC communication module is sequentially decoded to obtain communication data.

[0136] Optionally, the thermal communication card obtains a voltage signal generated when the DC communication module and the thermal communication card transmit data signals, and converts the voltage signal into a current signal.

[0137] Optionally, based on the DC communication method shown in the above embodiment of the present invention, the DC system also includes a distributed control DCS system; the method also includes:

[0138] The DCS system receives the communication data sent by the thermal communication card based on the current signal, and displays it for the user to view.

[0139] In an embodiment of the present invention, a thermal communication card connected to the DC communication module is provided after the DC communication module; when data is transmitted over long distances, the DC communication module converts the communication data into a data signal that can be safely transmitted over long distances, and transmits the data to the thermal communication card, so that the thermal communication card converts the received data signal to obtain complete and accurate communication data; so that subsequent operation and maintenance personnel can accurately read the communication data.

[0140] Optionally, based on the DC communication method shown in the above embodiment of the present invention, the data transmission module includes a parallel upload module and a collection module; the method further includes:

[0141] The collection module receives the communication data collected by the plurality of charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module;

[0142] The parallel upload module uploads the collected communication data in parallel to the DC communication module.

[0143] Specifically, the collection module receives the communication data sent by each charging cabinet that detects a fault state through the communication interface; collects the communication data and then sends it to the parallel upload module; the parallel upload module uploads the collected communication data in parallel to the DC communication module.

[0144] In an embodiment of the present invention, a data transmission module is provided between the charging cabinet and the DC communication module. The collection module in the data transmission module receives the communication data collected by the multiple charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module in the data transmission module; so that the parallel upload module uploads the collected communication data in parallel to the DC communication module. For subsequent users to view. This avoids the attenuation of communication values ​​caused by multiple communication modules, so as to improve the accuracy and stability of DC data, that is, communication data.

[0145] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0146] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0147] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A DC system, characterized in that: The DC system includes a plurality of charging cabinets, a data transmission module and a DC communication module; The multiple charging cabinets are all connected to the DC communication module via the data transmission module; The communication data of the multiple charging cabinets are uploaded in parallel through the data transmission module, so as to send the communication data uploaded in parallel to the DC communication module.

2. The DC system according to claim 1, characterized in that: The charging cabinet is provided with a preset communication protocol, wherein the preset communication protocol has the function of uploading data in parallel.

3. The DC system according to claim 1, characterized in that: The data transmission module is a cable; One end of the cable connects the output end of each charging cabinet in parallel, and the other end is connected to the DC communication module; When the charging cabinet detects the communication data, the communication data is sent to the DC communication module through a cable according to a preset communication protocol.

4. The DC system according to claim 3, characterized in that: The DC communication module includes a receiving module and a conversion and sending module; The receiving module is connected to the data transmission module, and the receiving module is connected to the conversion and transmission module; The receiving module receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module; The conversion and sending module converts the communication data into a data signal.

5. The DC system according to claim 4, characterized in that: The DC system also includes a thermal communication card; The thermal communication card is connected to the output end of the DC communication module; The thermal communication card receives the data signal uploaded by the DC communication module, and converts the data signal to obtain communication data.

6. The DC system according to claim 5, characterized in that: The DC system also includes a distributed control DCS system; The DCS system is connected to the thermal communication card; The DCS system receives the communication data sent by the thermal communication card and displays it for the user to view.

7. The DC system according to claim 1, characterized in that: The data transmission module includes a parallel uploading module and a collection module; The input end of the collection module is connected to the plurality of charging cabinets, the output end of the collection module is connected to the input end of the parallel upload module, and the output end of the parallel upload module is connected to the DC communication module; The collection module receives the communication data collected by the plurality of charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module; The parallel upload module uploads the collected communication data in parallel to the DC communication module.

8. A DC communication method, characterized in that: Applied to the DC system of claim 1, the DC system comprises a plurality of charging cabinets, a data transmission module and a DC communication module; the method comprises: For each charging cabinet, the charging cabinet determines whether communication data is detected; If at least two charging cabinets detect communication data, the charging cabinets upload the detected communication data in parallel through the data transmission module, and send the parallel uploaded communication data to the DC communication module.

9. The method according to claim 8, characterized in that The DC communication module includes a receiving module and a conversion and sending module; the method includes: The receiving module receives the communication data uploaded in parallel, and sends the communication data uploaded in parallel to the conversion and sending module; The conversion and sending module converts the communication data into a data signal.

10. The method according to claim 8, characterized in that The data transmission module includes a parallel upload module and a collection module; the method also includes: The collection module receives the communication data collected by the plurality of charging cabinets, collects the communication data, and sends the collected communication data to the parallel upload module; The parallel upload module uploads the collected communication data in parallel to the DC communication module.

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