Looped network state monitoring method and system based on digital control unit

Abstract

The invention discloses a looped network state monitoring method and system based on a digital control unit, and relates to the technical field of converter valve control, and the method comprises the steps: responding to instruction information sent by monitoring equipment, carrying out the processing through a looped network monitoring loop, and obtaining first state information; the first state information is transmitted back to the monitoring device through the looped network monitoring loop; wherein each ring network monitoring loop comprises at least two control units, and the at least two control units are connected in series. Therefore, analog quantity and digital quantity state monitoring of the converter valve semiconductor device can be realized.

Description

Technical Field

[0001] This application relates to the field of converter valve technology, and in particular to a method and system for monitoring the status of a ring network based on a digital control unit. Background Technology

[0002] DC valve control systems based on thyristor converter valves currently possess relatively complete control and fault response strategies and mature universal valve control interface specifications. However, thyristor control units are typically based on analog circuit logic, using single-pulse or multi-pulse combinations of optical pulse report signals to characterize the thyristor's operating status, such as power extraction, reverse voltage, or protective triggering, lacking intuitive and detailed thyristor status monitoring.

[0003] Due to the large number of converter valve components, a high sampling rate is required for reliable monitoring, resulting in a massive amount of data for status monitoring. This new status monitoring requirement poses a challenge to the data transmission and processing performance of existing valve control systems. Currently, the related functions and networking communication solutions for converter valve status monitoring are still in the exploratory stage. Summary of the Invention

[0004] A ring network status monitoring method based on a digital control unit is provided, which can realize the monitoring of analog and digital status of converter valve semiconductor devices.

[0005] Firstly, a ring network status monitoring method based on a digital control unit is provided for monitoring the device to be monitored. The monitoring method includes:

[0006] In response to the command information sent by the monitoring equipment, it is processed through the ring network monitoring loop to obtain the first status information;

[0007] The first status information is transmitted back to the monitoring equipment via the ring network monitoring loop;

[0008] Each ring network monitoring loop includes at least two control units, and the at least two control units are connected in series.

[0009] In some embodiments, the first status information is obtained by processing through a ring network monitoring loop, including:

[0010] Based on the instruction information, the corresponding operating characteristic data is selected, and the status information includes the corresponding operating characteristic data; among them, the control unit collects and latches the operating characteristic data according to the monitoring frequency of the operating characteristics to obtain the operating characteristic data.

[0011] In some embodiments, the operating characteristics include the operating characteristics of the device to be monitored and the operating characteristics of the control unit.

[0012] In some embodiments, the control unit collects and latches the operating characteristic data according to the monitoring frequency of the operating characteristics, and obtaining the operating characteristic data further includes:

[0013] Based on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information respectively.

[0014] In some embodiments, depending on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information, respectively.

[0015] Operating characteristic data monitored at a frequency of microseconds are latched into real-time information; operating characteristic data monitored at a frequency of milliseconds are latched into non-real-time information.

[0016] In some embodiments, depending on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information, respectively.

[0017] When the monitoring frequency of the operating characteristics is higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and sequentially latch the collected operating characteristic data into the real-time information.

[0018] When the monitoring frequency of the operating characteristics is not higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and latch the collected operating characteristic data into the non-real-time information according to the corresponding number.

[0019] In some embodiments, after the real-time information is transmitted back as first status information, the current real-time information status is updated.

[0020] In some embodiments, based on the instruction information, the corresponding number of the running characteristic is selected from the non-real-time information for feedback, and the status of the running characteristic with the corresponding number in the non-real-time information is updated.

[0021] Secondly, this application provides a ring network status monitoring system based on a digital control unit for monitoring devices under monitoring. The monitoring system includes:

[0022] The ring network monitoring loop responds to the command information sent by the monitoring device, processes it to obtain first status information, and then transmits the first status information back to the monitoring device through the ring network monitoring loop.

[0023] Each ring network monitoring loop includes at least two control units, which are connected in series.

[0024] In some embodiments, the monitoring system further includes:

[0025] The monitoring equipment is connected to the ring network monitoring loop via fiber optic communication.

[0026] In some embodiments, the monitoring device includes at least two optical channels, each of which is communicatively connected to a corresponding ring network monitoring loop.

[0027] The solution provided in this application expands the number of control units that the monitoring system can access through a ring network architecture without affecting the trigger-based reporting control, improves data transmission efficiency, realizes the monitoring of analog and digital status of converter valve semiconductor devices, expands the means of online monitoring and fault analysis of converter valve control system, and significantly improves the convenience of operation and maintenance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0030] Figure 1 A schematic diagram of a system structure provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of a real-time information storage structure provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of a non-real-time information storage structure provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of a data frame structure output by a control unit, provided in an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of a data frame transmission process provided in an embodiment of this application;

[0035] Reference numerals: 10-Monitoring equipment, 101-Optical channel, 20-Ring network monitoring circuit, 201-Control unit, 202-Monitoring device. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0037] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0038] References such as “one embodiment” or “some embodiments” as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the terms “comprising,” “including,” “having,” and variations thereof, as used in this specification, mean “including, but not limited to,” unless otherwise specifically emphasized.

[0039] It should be noted that in the embodiments of this application, "and / or" describes the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the character " / ", unless otherwise specified, generally indicates that the associated objects before and after it are in an "or" relationship.

[0040] It should be noted that in the embodiments of this application, "connection" can be understood as electrical connection. The connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components.

[0041] As mentioned earlier, due to the complex composition and large number of components in the converter valve, real-time monitoring of its internal components is necessary to ensure stable operation. This requires a high sampling rate, which directly leads to a sharp increase in the amount of data generated during status monitoring, posing significant challenges to data transmission, storage, and subsequent processing.

[0042] To address the aforementioned technical issues, this application provides a ring network status monitoring method and system based on a digital control unit, which can monitor the analog and digital status of converter valve semiconductor devices, expand the means of online monitoring and fault analysis of converter valve control systems, and significantly improve the convenience of operation and maintenance.

[0043] Thyristor-controlled converter valves and novel converter valve semiconductor devices (such as reverse-resistance IGCTs) are undergoing gradual improvements and research in digital circuit design, in addition to conventional trigger reporting functions. Digital control units possess flexible expansion capabilities, enabling them to acquire, for example, the voltage and current status of individual converter valve components, as well as customized, detailed monitoring of the control unit's internal operation, triggering, and abnormal states.

[0044] Figure 1This is a schematic diagram of a system structure provided in an embodiment of this application. Figure 1 The system shown includes a monitoring device 10 and multiple sets of ring network monitoring loops 20. Each set of ring network monitoring loops 20 is independent of each other. Each ring network monitoring loop 20 includes multiple control units 201, and each control unit 201 is connected in series.

[0045] The monitoring device 10 is mainly used to send command information to the ring network monitoring loop 20 and receive the first status information returned by the ring network monitoring loop 20 in response to the command information, and to parse the first status information. Specifically, the monitoring device 10 can be a programmable logic controller, a computer, etc.

[0046] In some embodiments, the monitoring device 10 is connected to each group of ring network monitoring loops 20 via optical fiber communication.

[0047] In some embodiments, the monitoring device 10 is provided with multiple optical channels 101, and each ring network monitoring loop 20 transmits information to the monitoring device 10 through a set of optical channels 101.

[0048] Specifically, the ring network monitoring loop 20 includes multiple control units 201, which are connected in series, meaning that the output of one control unit 201 is connected to the input of the next control unit 201, and so on, connecting all the control units 201 in the ring network monitoring loop 20. The input of the first control unit 201 in the ring network monitoring loop 20 is connected to the output of a set of optical channels 101 of the monitoring device 10, and the output of the last control unit 201 in the ring network monitoring loop 20 is connected to the input of a set of optical channels 101 of the monitoring device 10. Each control unit 201 communicates with each other via optical fiber. The chips in the control units 201 can be Field Programmable Gate Arrays (FPGAs), Complex Programmable Logic Devices (CPLDs), or Digital Signal Processors (DSPs), and sampling is performed using digital-to-analog converters (ADCs).

[0049] Each control unit 201 is connected to a monitored device 202 in a converter valve. The control unit 201 collects operational characteristic data and outputs the collected operational data in the form of data frames based on the command data received from the monitoring device 10. The first status information is a complete data frame output by the last control unit in the ring network monitoring loop 20, which includes data frames from all control units 201 in the ring network monitoring loop 20. All data frames from control units 201 are sequentially arranged to form a complete data frame during transmission. The operational characteristics include the operational characteristics of the monitored device 202 and the control unit 201. The operational characteristics of the monitored device 202 include analog status information such as voltage, current, temperature, and light intensity. The operational characteristics of the control unit 201 include digital status information such as the internal operating status and abnormal alarms of the control unit. The monitored device 202 can be a semiconductor device in the converter valve, such as a thyristor or a reverse-resistance IGCT.

[0050] In some embodiments, each ring network monitoring loop 20 preferably contains no more than 8 control units 201, which maximizes the use of the monitoring equipment's expansion ports while ensuring the quality and speed of data transmission.

[0051] This application provides a ring network status monitoring method based on a digital control unit. The method, based on the aforementioned system, specifically includes:

[0052] Step 10: The monitoring device 10 sends instruction information to the ring network monitoring loop 20.

[0053] The instruction information includes the category name of the operational characteristic that is requested to be monitored.

[0054] Step 20: In response to the command information sent by the monitoring device 10, the ring network monitoring loop 20 processes the information to obtain the first status information. This first status information includes the data frames output by all control units 201 in the ring network monitoring loop 20 when responding to the current command information.

[0055] Specifically, the control unit 201 acquires and latches the required operating characteristic data through high-frequency sampling. When it receives the instruction information, the control unit 201 selects the corresponding operating characteristic data according to the instruction information, forms a data frame, and outputs it.

[0056] In some embodiments, the operating characteristics include the operating characteristics of the device under monitoring 202 and the operating characteristics of the control unit 201. Specifically, the operating characteristics of the device under monitoring 202 include analog quantity status information such as voltage, current, temperature, and light intensity of the device under monitoring 202. The operating characteristics of the control unit 201 include digital quantity status information such as the internal operating status and abnormal alarms of the control unit 201.

[0057] After the data frame is output, the control unit 201 updates the data and begins storing the new sampled data.

[0058] In some embodiments, the control unit 201 collects the required operating characteristic data through high-frequency sampling, and according to the monitoring frequency of the operating characteristics, the control unit 201 latches the collected operating characteristic data into real-time information and non-real-time information respectively.

[0059] In some embodiments, operating characteristic data with a monitoring frequency in the microsecond range are stored in real-time information. Examples include voltage and current signals of the monitored device 202, and digital signals of the control unit 201. Operating characteristic data with a monitoring frequency in the millisecond range are stored in non-real-time information.

[0060] In another embodiment, the control unit 201 collects the required operating characteristic data through high-frequency sampling, and stores the collected operating characteristic data into real-time information and non-real-time information respectively according to the monitoring frequency of the operating characteristics. Specifically,

[0061] When the monitoring frequency of the operating characteristics is higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and sequentially latch the collected operating characteristic data into the real-time information.

[0062] When the monitoring frequency of the operating characteristics is not higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and latch the collected operating characteristic data into the non-real-time information.

[0063] Among them, such as Figure 2 As shown, the real-time information storage structure stores data sequentially according to each sample of each operational characteristic. For example... Figure 3 As shown, the non-real-time information storage structure stores non-real-time information according to numbers. For example, number a is temperature data, number b is light intensity data of channel one, number c is light intensity data of channel two, etc.

[0064] The control unit 201 outputs the stored data as a data frame according to the instruction information and updates the output data.

[0065] In some embodiments, if the instruction information requests real-time information, the control unit 201 will output all data in the real-time information in data frame format; at the same time, the control unit 201 will update all operating characteristic states in the real-time information and begin latching new sampled data.

[0066] In some embodiments, if the instruction information requests the running feature data numbered 'a' in the non-real-time information, the control unit 201 will output the running feature data numbered 'a' in the non-real-time information in a data frame format; at the same time, the control unit 201 will update the status of the running feature numbered 'a' in the non-real-time information and start latching new sampled data.

[0067] In another embodiment, if the instruction message requests data with number n from both real-time and non-real-time information, then the control unit 201 will use all data from the real-time information and the data with number n from the non-real-time information as... Figure 4 The data frame format shown is output; simultaneously, the control unit 201 updates the status of all operating characteristics in the real-time information and the status of the operating characteristic numbered n in the non-real-time information, and begins latching new sampled data. Furthermore, each instruction information request requests a set of operating characteristic data from the non-real-time information, which saves data frame bits and effectively improves the transmission rate.

[0068] Step 30: The ring network monitoring loop 20 transmits the first status information back to the monitoring device 10; specifically, as follows... Figure 5 As shown, each control unit 201 uses frame interpolation, inserting the data frame it needs to output after the data frames received from other control units. Each control unit 201 forwards a new data frame to its next control unit 201, consisting of the instruction information sent by the monitoring device 10, the received data frames from other control units, and the data frame it needs to output. This process continues until the last control unit 201 in the ring network monitoring loop 20 outputs a complete data frame, which includes the instruction data frame and the data frames that all control units 201 in the ring network monitoring loop 20 need to output.

[0069] The monitoring device 10 receives the first status information, including the complete data frame content, transmitted back from the ring network monitoring loop 20 through the receiving channel.

[0070] Step 40: Monitoring device 10 performs signal analysis and updates on the received first status information. After receiving the first status information transmitted back from the ring network monitoring loop 20, monitoring device 10 identifies the variables of real-time information according to the data frame structure, identifies the variable type of the current non-real-time information transmission by number, and updates the variables to the current state of the variables inside monitoring device 10. Finally, it transmits the data to the monitoring backend via waveform recording or remote signaling.

[0071] In some embodiments, the monitoring device 10 records key information by recording waveforms according to the triggered waveform recording command.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A method for monitoring the status of a ring network based on a digital control unit, characterized in that, The monitoring method for monitoring a device to be monitored includes: In response to the command information sent by the monitoring equipment, it is processed through the ring network monitoring loop to obtain the first status information; The first status information is transmitted back to the monitoring device through the ring network monitoring loop; Each of the ring network monitoring loops includes at least two control units, and the at least two control units are connected in series.

2. The ring network status monitoring method based on a digital control unit according to claim 1, characterized in that, The process of obtaining the first status information through the ring network monitoring loop also includes, According to the instruction information, the corresponding operating characteristic data is selected, and the first status information includes the corresponding operating characteristic data; wherein, the control unit collects and latches the operating characteristic data according to the monitoring frequency of the operating characteristics to obtain the operating characteristic data.

3. The ring network status monitoring method based on a digital control unit according to claim 2, characterized in that, The operating characteristics include the operating characteristics of the device under monitoring and the operating characteristics of the control unit.

4. The ring network status monitoring method based on a digital control unit according to claim 2, characterized in that, The control unit collects and latches the operating characteristic data according to the monitoring frequency of the operating characteristics. The obtained operating characteristic data also includes: Based on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information respectively.

5. The ring network status monitoring method based on a digital control unit according to claim 4, characterized in that, Based on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information respectively. When the monitoring frequency of the operating characteristics is higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and sequentially latch the collected operating characteristic data into the real-time information. When the monitoring frequency of the operating characteristics is not higher than the sending frequency of the instruction information, the control unit will sample according to the monitoring frequency of the operating characteristics and latch the collected operating characteristic data into the non-real-time information according to the corresponding number.

6. The ring network status monitoring method based on a digital control unit according to claim 4, characterized in that, Based on the monitoring frequency of the operating characteristics, the control unit latches the collected operating characteristic data into real-time information and non-real-time information respectively. The operational characteristic data, monitored at a frequency of microseconds, is latched into real-time information. Data on operational characteristics monitored at a millisecond frequency is latched into non-real-time information.

7. The ring network status monitoring method based on a digital control unit according to claim 4, characterized in that, After the real-time information is transmitted back as the first status information, the status of the current real-time information is updated.

8. The ring network status monitoring method based on a digital control unit according to claim 4, characterized in that, Based on the instruction information, select the corresponding number of the running characteristic in the non-real-time information for feedback, and update the running characteristic status of the corresponding number in the non-real-time information.

9. A ring network status monitoring system based on a digital control unit, characterized in that, The monitoring system is used to monitor devices under surveillance, and includes: A ring network monitoring loop, which responds to instruction information sent by the monitoring device, processes it to obtain first status information, and transmits the first status information back to the monitoring device through the ring network monitoring loop; Each of the ring network monitoring loops includes at least two control units, and the at least two control units are connected in series.

10. A ring network status monitoring system based on a digital control unit according to claim 9, characterized in that, The monitoring system also includes: The monitoring device is connected to the ring network monitoring loop via optical fiber communication.

11. A ring network status monitoring system based on a digital control unit according to claim 9, characterized in that, The monitoring device includes at least two optical channels, each of which is communicatively connected to the corresponding ring network monitoring loop.

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