Digital monitoring device, digital monitoring system and control protection system

Abstract

The invention provides a digital monitoring device, a digital monitoring system and a control protection system. And the communication protocol of the first return signal is converted through the conversion module to obtain a second return signal, and the second return signal is sent to the valve-based electronic equipment through the sending module. It can be seen that conversion of the return signals is achieved, and normal communication between the digital trigger monitoring board card and the valve base electronic equipment is guaranteed. In addition, an alarm signal can be generated through the processing module, and the maximum value, the minimum value and the average value of the alarm signal and the monitoring data in a preset time period can be sent to the upper computer, so that stable operation of the digital monitoring device can be ensured.

Description

Technical Field

[0001] This application relates to the technical field of power transmission and transformation, and particularly to a digital monitoring device, a digital monitoring system, and a control and protection system. Background Art

[0002] A DC transmission converter valve usually consists of multiple thyristor stage circuits. The trigger monitoring board card in the thyristor stage circuit can be connected to the Valve Base Electronics (VBE) through an optical fiber. The trigger monitoring board card can receive the trigger command from the valve base electronics and trigger the thyristor, and can also monitor the state of the thyristor stage circuit and send a feedback signal to the valve base electronics. The valve base electronics can generate a trigger signal and send it to the trigger monitoring board card through an optical fiber, and can also receive the feedback signal from the trigger monitoring board card through the optical fiber. Currently, a pulse method is used for signal transmission between the valve base electronics and the trigger monitoring board card.

[0003] With the continuous improvement of the requirements for the monitoring function of the converter valve, digital trigger monitoring board cards have been applied. Digital trigger monitoring board cards can have functions such as monitoring the voltage of thyristors and the state of thyristor stage circuits. Due to the large increase in monitoring data, the previous pulse communication method can no longer meet the requirements. However, due to the different communication protocols between the digital trigger monitoring board card and the valve base electronics, normal communication between the digital trigger monitoring board card and the valve base electronics cannot be achieved. Summary of the Invention

[0004] To solve the problem that the digital trigger monitoring board card and the valve base electronics cannot communicate normally in the prior art, this application provides a digital monitoring device, which can include a receiving module, a conversion module, and a sending module.

[0005] The receiving module is connected to the digital trigger monitoring board card, the receiving module is also connected to the conversion module, the sending module is connected to the conversion module, and the sending module is also connected to the valve base electronics. Specifically, the input end of the receiving module is connected to the digital trigger monitoring board card, the first output end of the receiving module is connected to the input end of the conversion module, the output end of the conversion module is connected to the input end of the sending module, and the output end of the sending module is connected to the valve base electronics.

[0006] Optionally, the receiving module is configured to: receive a first feedback signal from the digital trigger monitoring board card and send it to the conversion module.

[0007] The conversion module is configured to: convert the communication protocol of the first feedback signal to obtain a second feedback signal and send it to the sending module.

[0008] The sending module is configured to: send the second feedback signal to the valve base electronics.

[0009] In some possible implementations, the digital monitoring device further includes an extraction module and a processing module. The extraction module is connected to the receiving module, and the extraction module is also connected to the processing module. Specifically, the input end of the extraction module is connected to the second output end of the receiving module, and the output end of the extraction module is connected to the input end of the processing module.

[0010] The receiving module is further configured to: send the first return signal to the extraction module.

[0011] The extraction module is configured to: extract the monitoring data of the thyristor stage circuit from the first return signal and send it to the processing module.

[0012] The processing module is configured to: generate an alarm signal and send it to the host computer when at least one of the maximum value, minimum value, and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold.

[0013] Further, the processing module includes a receiving unit, a processing unit, a storage unit, and an interaction unit.

[0014] The receiving unit is connected to the extraction module, the receiving unit is also connected to the processing unit, both the storage unit and the interaction unit are connected to the processing unit, and the interaction unit is also connected to the host computer. Specifically, the input end of the receiving unit serves as the input end of the processing module and is connected to the extraction module. The output end of the receiving unit is connected to the input end of the processing unit, the first output end of the processing unit is connected to the input end of the storage unit, the second output end of the processing unit is connected to the input end of the interaction unit, and the output end of the interaction unit is connected to the host computer.

[0015] The receiving unit is configured to: receive the monitoring data and send it to the processing unit.

[0016] The processing unit is configured to: calculate the maximum value, minimum value, and average value of the monitoring data within a preset time period and send them to the storage unit and the interaction unit. It is also configured to generate an alarm signal and send it to the interaction unit when at least one of the maximum value, minimum value, and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold.

[0017] The storage unit is configured to: store the maximum value, minimum value, and average value of the monitoring data within a preset time period.

[0018] The interaction unit is configured to: send the alarm signal and the maximum value, minimum value, and average value of the monitoring data within a preset time period to the host computer.

[0019] Exemplarily, the thyristor stage circuit includes a thyristor, a damping branch, a voltage equalizing resistor, and a digital trigger monitoring board.

[0020] The anode of the thyristor, the first end of the damping branch, and the first end of the voltage-sharing resistor are connected. The cathode of the thyristor, the second end of the damping branch, and the second end of the voltage-sharing resistor are all connected to the digital trigger monitoring board.

[0021] Optionally, the monitoring data includes at least one of the turn-off angle of the thyristor, the voltage of the thyristor, the impedance of the damping branch, and the resistance of the voltage-sharing resistor.

[0022] Furthermore, the extraction module is further configured to: extract the status of the digital trigger monitoring board from the first feedback signal. Wherein, the status of the digital trigger monitoring board includes an operating status and a fault status.

[0023] Of course, the interaction unit can also be used to: receive a preset threshold from the host computer and send the preset threshold to the processing unit.

[0024] Optionally, the communication protocol of the second feedback signal is the same as the preset communication protocol in the valve base electronic device.

[0025] On the other hand, the present application also provides a digital monitoring system, which may include a host computer and a digital monitoring device. The digital monitoring device is connected to the host computer, and the digital monitoring device is also connected to the digital trigger monitoring board.

[0026] The digital monitoring device is configured to: extract the monitoring data of the thyristor-level circuit from the first feedback signal from the digital trigger monitoring board, and send an alarm signal and the maximum value, minimum value, and average value of the monitoring data within a preset time period to the host computer according to the monitoring data.

[0027] The host computer is configured to: receive and display the alarm signal and the maximum value, minimum value, and average value of the monitoring data within a preset time period.

[0028] Optionally, the digital monitoring device is specifically configured to: calculate and store the maximum value, minimum value, and average value of the monitoring data within a preset time period. It is also configured to send the maximum value, minimum value, and average value of the monitoring data within a preset time period to the host computer, and generate an alarm signal and send it to the host computer when at least one of the maximum value, minimum value, and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold.

[0029] Furthermore, the host computer is further configured to: set a preset threshold and send it to the digital monitoring device.

[0030] On the other hand, the present application also provides a control and protection system, which may include a valve base electronic device and the above digital monitoring system.

[0031] The valve base electronic device is configured to: send a trigger signal to the thyristor-level circuit according to the second feedback signal from the digital monitoring system.

[0032] Understandably, a trigger monitoring board (which can be a digital trigger monitoring board or a conventional trigger monitoring board) needs to be set for each thyristor stage circuit. Of course, the conventional trigger monitoring board can communicate normally with the valve base electronic equipment. Multiple trigger monitoring boards and multiple thyristor stage circuits can form a converter valve.

[0033] Compared with the prior art, the beneficial effects of this application are as follows:

[0034] The digital monitoring device provided by this application converts the communication protocol of the first return signal from the digital trigger monitoring board through a conversion module, obtains the second return signal and sends it to the valve base electronic equipment through a sending module. It can be seen that this application realizes the conversion of the return signal and ensures the normal communication between the digital trigger monitoring board and the valve base electronic equipment.

[0035] The digital monitoring device provided by this application can also extract the monitoring data of the thyristor stage circuit from the first return signal through an extraction module, and when at least one of the maximum value, minimum value and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold, generate an alarm signal through a processing module and send the alarm signal, the maximum value, minimum value and average value of the monitoring data within the preset time period to the upper computer to ensure the stable operation of the digital monitoring device.

[0036] The digital monitoring system provided by this application can receive and display the alarm signal, the maximum value, minimum value and average value of the monitoring data within a preset time period through the upper computer to further analyze the alarm signal, the maximum value, minimum value and average value of the monitoring data within the preset time period, which can not only enable the normal communication between the digital trigger monitoring board and the valve base electronic equipment, but also monitor whether the digital trigger monitoring board and the thyristor stage circuit are operating normally, improving the working stability of the converter valve. Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a schematic structural diagram of the digital monitoring device in the embodiment of this application;

[0039] Figure 2 It is a schematic structural diagram of the digital monitoring device in the embodiment of this application;

[0040] Figure 3It is a schematic structural diagram of a processing module in an embodiment of the present application;

[0041] Figure 4 It is a schematic structural diagram of a thyristor-level circuit in an embodiment of the present application;

[0042] Figure 5 It is a schematic structural diagram of a digital monitoring system in an embodiment of the present application;

[0043] Figure 6 It is a schematic structural diagram of a control and protection system in an embodiment of the present application. Detailed implementation manners

[0044] Next, the technical solutions in the present application will be described with reference to the accompanying drawings.

[0045] In the embodiments of the specification, claims and drawings of the present application, terms such as "first", "second", etc. are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0046] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B may be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one) of the following" or similar expressions refer to any combination of these items, including any combination of single items (ones) or plural items (ones). For example, at least one (one) of a, b or c may mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c may be single or multiple.

[0047] The present application provides a digital monitoring device, as Figure 1 shown. The digital monitoring device 10 includes a receiving module 1, a conversion module 2 and a sending module 3.

[0048] The input end of the receiving module 1 is connected to the digital trigger monitoring board TTM. The first output end of the receiving module 1 is connected to the input end of the conversion module 2. The output end of the conversion module 2 is connected to the input end of the sending module 3. The output end of the sending module 3 is connected to the valve base electronic equipment VBE.

[0049] Optionally, the receiving module 1 is configured to: receive the first return signal S1 from the digital trigger monitoring board TTM and send it to the conversion module 2.

[0050] The conversion module 2 is configured to: convert the communication protocol of the first return signal S1 to obtain a second return signal S2 and send it to the sending module 3.

[0051] The sending module 3 is configured to: send the second return signal S2 to the valve base electronic equipment VBE. The communication protocol of the second return signal S2 is the same as the preset communication protocol in the valve base electronic equipment VBE.

[0052] In some possible implementation manners, the digital monitoring device 10 further includes an extraction module 4 and a processing module 5, as Figure 2 shown. The extraction module 4 is connected to the receiving module 1, and the extraction module 4 is also connected to the processing module 5. Specifically, the input end of the extraction module 4 is connected to the second output end of the receiving module 1, and the output end of the extraction module 4 is connected to the input end of the processing module 5.

[0053] The receiving module 1 is further configured to: send the first return signal S2 to the extraction module 4.

[0054] The extraction module 4 is configured to: extract the monitoring data D of the thyristor stage circuit B from the first return signal S1 and send it to the processing module 5.

[0055] The processing module 5 is configured to: generate an alarm signal S3 and send it to the upper computer 20 when at least one of the maximum value, minimum value, and average value of the monitoring data D within a preset time period exceeds the corresponding preset threshold.

[0056] Further, as Figure 3 shown, the processing module 5 includes a receiving unit 51, a processing unit 52, a storage unit 53, and an interaction unit 54.

[0057] The receiving unit 51 is connected to the extraction module 4, and the receiving unit 51 is also connected to the processing unit 52. The storage unit 53 and the interaction unit 54 are both connected to the processing unit 52, and the interaction unit 54 is also connected to the host computer 20. Specifically, the input end of the receiving unit 51 serves as the input end of the processing module 5 and is connected to the extraction module 4. The output end of the receiving unit 51 is connected to the input end of the processing unit 52, the first output end of the processing unit 52 is connected to the input end of the storage unit 53, the second output end of the processing unit 52 is connected to the input end of the interaction unit 54, and the output end of the interaction unit 54 is connected to the host computer 20.

[0058] The receiving unit 51 is configured to: receive the monitoring data D and send it to the processing unit 52.

[0059] The processing unit 52 is configured to: calculate the maximum value, minimum value, and average value of the monitoring data D within a preset time period and send them to the storage unit 53 and the interaction unit 54. It is also configured to generate an alarm signal S3 and send it to the interaction unit 54 when at least one of the maximum value, minimum value, and average value of the monitoring data D within the preset time period exceeds the corresponding preset threshold.

[0060] The storage unit 53 is configured to: store the maximum value, minimum value, and average value of the monitoring data D within a preset time period.

[0061] The interaction unit 54 is configured to: send the alarm signal S3 and the maximum value, minimum value, and average value of the monitoring data D within a preset time period to the host computer 20.

[0062] Of course, the processing unit 52 can also send the monitoring data within a period of time before and after the alarm moment to the storage unit 53 for storage, and then the monitoring data before and after the alarm moment can be retrieved through the host computer 20 for analysis.

[0063] Exemplarily, as Figure 4 shown, the thyristor-level circuit B includes a thyristor Thy, a damping branch A, a voltage-sharing resistor R1, and a digital trigger monitoring board TTM. The damping branch A may include a damping resistor R2, a damping resistor R3, a damping capacitor C1, a damping capacitor C2, and a damping capacitor C3. Among them, the damping resistor R2 and the damping capacitor C2 are connected in series to form a first damping branch A1, the damping resistor R3 and the damping capacitor C3 are connected in series to form a second damping branch A2, and the first damping branch A1 and the second damping branch A2 are connected in parallel and then connected in series with the damping capacitor C1.

[0064] The anode of the thyristor Thy, the first end of the damping branch A, and the first end of the voltage-sharing resistor R1 are connected, and the cathode of the thyristor Thy, the second end of the damping branch A, and the second end of the voltage-sharing resistor R1 are all connected to the digital trigger monitoring board TTM.

[0065] Optionally, the monitoring data D includes at least one of the turn-off angle of the thyristor Thy, the voltage of the thyristor Thy, the impedance of the damping branch A, and the resistance of the voltage-sharing resistor R1.

[0066] Furthermore, the extraction module 4 is further configured to: extract the status of the digital trigger monitoring board TTM from the first return signal S1. The status of the digital trigger monitoring board TTM includes the operating status and the fault status.

[0067] Of course, the interaction unit 54 can also be configured to: receive a preset threshold from the host computer 20 and send the preset threshold to the processing unit 52.

[0068] An embodiment of the present application also provides a digital monitoring system, as Figure 5 shown. The digital monitoring system 100 may include a host computer 20 and a digital monitoring device 10. The digital monitoring device 10 is connected to the host computer 20, and the digital monitoring device 10 is also connected to the digital trigger monitoring board TTM.

[0069] The digital monitoring device 10 is configured to: extract the monitoring data D of the thyristor stage circuit from the first return signal S1 from the digital trigger monitoring board TTM, and send an alarm signal S3 and the maximum value, minimum value, and average value of the monitoring data D within a preset time period to the host computer 20.

[0070] The host computer 20 is configured to: receive and display the alarm signal S3 and the maximum value, minimum value, and average value of the monitoring data D within a preset time period. Specifically, the host computer 20 can display the alarm signal S3 and the maximum value, minimum value, and average value of the monitoring data D within a preset time period in a graphical interface.

[0071] Optionally, the digital monitoring device 10 is specifically configured to: calculate and store the maximum value, minimum value, and average value of the monitoring data D within a preset time period. It is also configured to send the maximum value, minimum value, and average value of the monitoring data D within a preset time period to the host computer 20, and generate an alarm signal S3 and send it to the host computer 20 when at least one of the maximum value, minimum value, and average value of the monitoring data D within a preset time period exceeds the corresponding preset threshold.

[0072] Furthermore, the host computer 20 is also configured to: set a preset threshold and send it to the digital monitoring device 10.

[0073] The present application also provides a control and protection system, as Figure 6 shown. The control and protection system 1000 may include a valve base electronics VBE and the above digital monitoring system 100.

[0074] The valve base electronic device VBE is used to send a trigger signal S4 to the thyristor stage circuit B1 according to the second feedback signal S2 from the digital monitoring system 100 .

[0075] It is understandable that each thyristor stage circuit needs to be equipped with a trigger monitoring board (which can be a digital trigger monitoring board TTM or a conventional trigger monitoring board). Figure 6 As shown, the conventional trigger monitoring board (i.e. Figure 6 TTM2 to TTMn in the trigger monitoring board can communicate normally with VBE. Figure 6 TTM1 to TTMn in the circuit) and multiple thyristor stages (i.e. Figure 6 B1 to Bn)) in the figure can constitute a converter valve.

[0076] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A digital monitoring device, characterized in that, It includes a receiving module, a conversion module and a sending module; The receiving module is connected to the digital trigger monitoring board card, the receiving module is also connected to the conversion module, the sending module is connected to the conversion module, and the sending module is also connected to the valve base electronic device; The receiving module is configured to: receive a first feedback signal from the digital trigger monitoring board card and send it to the conversion module; The conversion module is configured to: convert the communication protocol of the first feedback signal to obtain a second feedback signal and send it to the sending module; The sending module is configured to: send the second feedback signal to the valve base electronic device.

2. The digital monitoring device according to claim 1, wherein The digital monitoring device further includes an extraction module and a processing module; the extraction module is connected to the receiving module, and the extraction module is also connected to the processing module; The receiving module is further configured to: send the first feedback signal to the extraction module; The extraction module is configured to: extract monitoring data of the thyristor stage circuit from the first feedback signal and send it to the processing module; The processing module is configured to: generate an alarm signal and send it to the upper computer when at least one of the maximum value, minimum value and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold.

3. The digital monitoring device according to claim 2, wherein The processing module includes a receiving unit, a processing unit, a storage unit and an interaction unit; The receiving unit is connected to the extraction module, the receiving unit is also connected to the processing unit, both the storage unit and the interaction unit are connected to the processing unit, and the interaction unit is also connected to the upper computer; The receiving unit is configured to: receive the monitoring data and send it to the processing unit; The processing unit is configured to: calculate the maximum value, minimum value and average value of the monitoring data within a preset time period and send them to the storage unit and the interaction unit; and is also configured to generate an alarm signal and send it to the interaction unit when at least one of the maximum value, minimum value and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold; The storage unit is configured to: store the maximum value, minimum value and average value of the monitoring data within a preset time period; The interaction unit is configured to: send the alarm signal and the maximum value, minimum value and average value of the monitoring data within a preset time period to the upper computer.

4. The digital monitoring device according to claim 2, wherein The thyristor stage circuit includes a thyristor, a damping branch, a voltage equalizing resistor and the digital trigger monitoring board card; The anode of the thyristor, the first end of the damping branch and the first end of the voltage equalizing resistor are connected, and the cathode of the thyristor, the second end of the damping branch and the second end of the voltage equalizing resistor are all connected to the digital trigger monitoring board card.

5. The digital monitoring device according to claim 4, wherein, The monitoring data includes at least one of the turn-off angle of the thyristor, the voltage of the thyristor, the impedance of the damping branch and the resistance of the voltage equalizing resistor.

6. The digital monitoring device according to claim 2, wherein The extraction module is further configured to: extract the status of the digital trigger monitoring board card from the first feedback signal; wherein, the status of the digital trigger monitoring board card includes an operating status and a fault status.

7. The digital monitoring device according to claim 3, wherein the interaction unit is further configured to: receive the preset threshold value from the host computer and send the preset threshold value to the processing unit.

8. The digital monitoring device according to claim 1, characterized in that, The communication protocol of the second return signal is the same as the preset communication protocol in the valve base electronic device.

9. A digital monitoring system, characterized in that, comprising a host computer and a digital monitoring device; the digital monitoring device is connected to the host computer, and the digital monitoring device is further connected to a digital trigger monitoring board; The digital monitoring device is configured to: extract the monitoring data of the thyristor-level circuit from the first return signal from the digital trigger monitoring board, and send an alarm signal and the maximum value, minimum value, and average value of the monitoring data within a preset time period to the host computer; The host computer is configured to: receive and display the alarm signal and the maximum value, minimum value, and average value of the monitoring data within a preset time period.

10. The digital monitoring system according to claim 9, wherein the digital monitoring device is specifically configured to: calculate and store the maximum value, minimum value, and average value of the monitoring data within a preset time period; and is further configured to send the maximum value, minimum value, and average value of the monitoring data within a preset time period to the host computer, and generate an alarm signal and send it to the host computer when at least one of the maximum value, minimum value, and average value of the monitoring data within a preset time period exceeds the corresponding preset threshold value.

11. The digital monitoring system according to claim 10, wherein the host computer is further configured to: set the preset threshold value and send it to the digital monitoring device.

12. A control and protection system, characterized in that, comprising a valve base electronic device and the digital monitoring system according to any one of claims 9 to 11; The valve base electronic device is configured to: send a trigger signal to the thyristor-level circuit according to the second return signal from the digital monitoring system.

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