Damping loop state monitoring system and method and edge server

Abstract

The invention relates to a damping loop state monitoring system and method and an edge server. The voltage sampling circuit is used for acquiring a target analog voltage of the damping loop and sending the target analog voltage to the analog-to-digital conversion circuit; the current sampling circuit is used for acquiring target analog current of the damping loop and sending the target analog current to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used for performing analog-to-digital conversion on the target analog voltage and the target analog current to obtain a target digital voltage and a target digital current, and sending the target digital voltage and the target digital current to the edge server through a transmission module; and the edge server is used for determining a damping parameter of the damping loop according to the target digital voltage and the target digital current, and determining a state monitoring result of the damping loop according to the damping parameter and a damping parameter threshold. Based on the damping loop state monitoring system provided by the embodiment of the invention, the state monitoring result of the damping loop can be obtained in real time.

Description

Technical Field

[0001] The present application relates to the field of smart grid technology, and in particular to a damping circuit state monitoring system, method and edge server. Background Art

[0002] As a key module of the converter valve, the damping circuit is of great significance for suppressing low-frequency oscillations of the power system, suppressing overvoltage, reducing current shocks, and maintaining stable operation of the power system. However, due to the complexity of the converter valve and the uncertainty of the external environment, the damping circuit may encounter various faults and losses during operation. If not handled promptly and effectively, it may cause unstable operation of the converter valve and even cause large-scale damage to power equipment and power outages in the power system.

[0003] Since current sensors and voltage sensors are not allowed to be installed inside the converter valve, it is impossible to monitor the status of the damping circuit in real time. Summary of the invention

[0004] Based on this, it is necessary to provide a damping circuit state monitoring system, method and edge server that can obtain the damping circuit state in real time to address the above technical problems.

[0005] In a first aspect, the present application provides a damping loop state monitoring system, the system comprising: a damping loop, a TVM board, a voltage sampling circuit, a current sampling circuit, an analog-to-digital conversion circuit, a transmission module and an edge server; the TVM board is connected in parallel with the damping loop, four voltage detection terminals are arranged on the TVM board, the voltage sampling circuit is connected to the voltage detection terminals, the current sampling circuit comprises a TMR sensor, and the TMR sensor is arranged in a preset area around the damping loop;

[0006] The voltage sampling circuit is used to obtain the target analog voltage of the damping loop and send the target analog voltage to the analog-to-digital conversion circuit;

[0007] The current sampling circuit is used to obtain the target analog current of the damping loop and send the target analog current to the analog-to-digital conversion circuit;

[0008] The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain a target digital voltage and a target digital current, and send the target digital voltage and the target digital current to the edge server through the transmission module;

[0009] The edge server is used to determine the damping parameter of the damping loop according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold.

[0010] In one of the embodiments, the voltage sampling circuit includes a voltage amplifier circuit, a low-pass filter circuit and an industrial frequency trap circuit, and the voltage amplifier circuit is connected to the voltage detection terminal;

[0011] The voltage amplifying circuit is used to amplify the initial voltage output by the voltage detecting terminal to obtain an amplified voltage, and send the amplified voltage to the low-pass filtering circuit;

[0012] The low-pass filter circuit is used to filter the amplified voltage to obtain a filtered voltage, and send the filtered voltage to the power frequency trap circuit;

[0013] The power frequency trap circuit is used to filter out the voltage data of a preset frequency in the filtered voltage to obtain the target analog voltage.

[0014] In one of the embodiments, the voltage sampling circuit further includes an overload indication circuit, and the overload indication circuit is connected to the power frequency trap circuit;

[0015] The overload indication circuit is used to receive the target analog voltage sent by the power frequency trap circuit, and output overload prompt information when the target analog voltage is greater than a preset voltage threshold.

[0016] In one embodiment, the current sampling circuit further includes a current amplifying circuit, a conditioning circuit and a bias zeroing circuit, wherein a first end of the current amplifying circuit is connected to the TMR sensor, a second end of the current amplifying circuit is connected to the conditioning circuit, and a third end of the current amplifying circuit is connected to the bias zeroing circuit;

[0017] The current amplifying circuit is used to amplify the initial current collected by the TMR sensor to obtain an amplified current when the bias zeroing circuit provides a bias current to the current amplifying circuit;

[0018] The conditioning circuit is used to condition the amplified current to obtain the target analog current.

[0019] In one of the embodiments, the current sampling circuit further includes a temperature compensation circuit, and the temperature compensation circuit is connected to the TMR sensor;

[0020] The temperature compensation circuit is used to compensate the temperature of the TMR sensor when the temperature of the TMR sensor is not within a preset temperature range.

[0021] In one embodiment, the analog-to-digital conversion circuit includes an AD conversion circuit, a microprocessor and a TTL conversion module;

[0022] The AD conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain an initial digital voltage and an initial digital current, and send the initial digital voltage and the initial digital current to the microprocessor;

[0023] The microprocessor is used to read and process the initial digital voltage and the initial digital current, obtain an intermediate digital voltage and an intermediate digital current, and send the intermediate digital voltage and the intermediate digital current to the TTL conversion module;

[0024] The TTL conversion module is used to convert the intermediate digital voltage and the intermediate digital current into level signals that comply with the TTL standard to obtain the target digital voltage and the target digital current.

[0025] In one of the embodiments, the system further comprises a laser power supply circuit, wherein the laser power supply circuit comprises a light source, a photoelectric conversion circuit and a voltage stabilization circuit;

[0026] The photoelectric conversion circuit is used to convert the optical signal emitted by the light source into an electrical signal, and to supply power to the voltage sampling circuit, the current sampling circuit and the analog-to-digital conversion circuit through the voltage stabilizing circuit.

[0027] In one of the embodiments, the edge server is further used to send the state monitoring result and the damping parameter to the cloud server, so that the cloud server can update the damping parameter threshold according to the state monitoring result and the damping parameter to obtain a new damping parameter threshold when the state monitoring result is abnormal;

[0028] Receive a new damping parameter threshold sent by the cloud server.

[0029] In a second aspect, the present application provides a damping circuit state monitoring method, comprising:

[0030] Acquire a target digital voltage and a target digital current of the damping loop; the target digital voltage and the target digital current are obtained by performing analog-to-digital conversion on the target analog voltage of the damping loop sent by the voltage sampling circuit and the target analog current of the damping loop sent by the current sampling circuit by an analog-to-digital conversion circuit;

[0031] A damping parameter of the damping loop is determined according to the target digital voltage and the target digital current, and a state monitoring result of the damping loop is determined according to the damping parameter and a damping parameter threshold.

[0032] In a third aspect, the present application also provides a damping circuit state monitoring device, comprising:

[0033] An acquisition module, used for acquiring a target digital voltage and a target digital current of the damping loop; the target digital voltage and the target digital current are obtained by performing analog-to-digital conversion on the target analog voltage of the damping loop sent by the voltage sampling circuit and the target analog current of the damping loop sent by the current sampling circuit by an analog-to-digital conversion circuit;

[0034] A determination module is used to determine a damping parameter of the damping loop according to the target digital voltage and the target digital current, and to determine a state monitoring result of the damping loop according to the damping parameter and a damping parameter threshold.

[0035] In a fourth aspect, the present application further provides an edge server, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the method steps provided in the second aspect when executing the computer program.

[0036] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method steps provided in the second aspect.

[0037] In a sixth aspect, the present application further provides a computer program product, comprising a computer program, which implements the method steps provided in the second aspect when executed by a processor.

[0038] The damping loop state monitoring system, method and edge server mentioned above, the system comprises: a damping loop, a TVM, a voltage sampling circuit, a current sampling circuit, an analog-to-digital conversion circuit, a transmission module and an edge server; the TVM board is connected in parallel with the damping loop, four voltage detection terminals are arranged on the TVM board, the voltage sampling circuit is connected with the voltage detection terminals, the current sampling circuit comprises a TMR sensor, and the TMR sensor is arranged in a preset area around the damping loop; the voltage sampling circuit is used to obtain the target analog voltage of the damping loop and send the target analog voltage to the analog-to-digital conversion circuit; the current sampling circuit is used to obtain the target analog current of the damping loop and send the target analog current to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain the target digital voltage and the target digital current, and send the target digital voltage and the target digital current to the edge server through the transmission module; the edge server is used to determine the damping parameter of the damping loop according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold. In the embodiment of the present application, the voltage detection terminal and the voltage sampling circuit on the TVM board are used to obtain the target analog voltage of the damping loop, and the TMR sensor is used to obtain the target analog current of the damping loop. The target analog voltage and the target analog current can be obtained without setting a voltage sensor and a current sensor inside the converter valve, so as to obtain the state monitoring result based on the target analog voltage and the target analog current, thereby avoiding the phenomenon that the state monitoring result of the damping loop cannot be obtained in real time due to the inability to set a voltage sensor and a current sensor inside the converter valve in the traditional technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 is a schematic diagram of a damping circuit state monitoring system in one embodiment;

[0041] Figure 2 A schematic diagram of the measurement principle of a TMR sensor in one embodiment;

[0042] Figure 3 is a schematic diagram of a voltage sampling circuit in an embodiment;

[0043] Figure 4 is a schematic diagram of a current sampling circuit in an embodiment;

[0044] Figure 5is a schematic diagram of a damping circuit state monitoring system in another embodiment;

[0045] Figure 6 is a schematic diagram of a laser power supply circuit in one embodiment;

[0046] Figure 7 A schematic diagram of a flow chart of a damping circuit state monitoring method in one embodiment;

[0047] Figure 8 A schematic flow chart of a COMTRADE recording file reading method in one embodiment;

[0048] Fig. 9 A schematic flow chart of a damping circuit state monitoring method in another embodiment;

[0049] Fig.10 is a structural block diagram of a damping circuit state monitoring device in one embodiment;

[0050] Fig.11 FIG. 4 is a diagram showing the internal structure of an edge server in one embodiment.

[0051] Description of reference numerals:

[0052] 1. Damping circuit; 2. TVM board; 3. Voltage sampling circuit;

[0053] 4. Current sampling circuit; 5. Analog-to-digital conversion circuit; 6. Transmission module;

[0054] 7. Edge server; 8. Laser power supply circuit;

[0055] 31. Voltage amplifier circuit; 32. Low-pass filter circuit; 33. Power frequency trap circuit;

[0056] 34. Overload indication circuit;

[0057] 41. TMR sensor; 42. Current amplifier circuit; 43. Conditioning circuit;

[0058] 44. Bias zeroing circuit; 45. Temperature compensation circuit;

[0059] 51. AD conversion circuit; 52. Microprocessor; 53. TTL conversion module;

[0060] 81. Light source; 82. Photoelectric conversion circuit; 83. Voltage stabilizing circuit. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0062] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0064] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] Since current sensors and voltage sensors are not allowed to be installed inside the converter valve at present, the focus is mainly on offline status monitoring of the converter valve. The research and application of real-time extraction technology of electrical parameters of components such as damping capacitors and damping resistors in the converter valve have not been involved. In addition, the existing converter valve monitoring system can only measure the impedance of the damping loop during the planned annual maintenance, and test whether the trigger monitoring board functions normally, but does not monitor the damping loop parameters in real time, and the self-test function of the trigger monitoring board is not perfect. Therefore, the present application proposes a damping loop status monitoring system, method and edge server that can solve the above-mentioned technical problems.

[0067] Figure 1 FIG. 1 is a schematic diagram of a damping circuit state monitoring system in one embodiment. Figure 1 As shown, the system includes: a damping loop 1, a TVM board 2, a voltage sampling circuit 3, a current sampling circuit 4, an analog-to-digital conversion circuit 5, a transmission module 6 and an edge server 7; the TVM board 2 is connected in parallel with the damping loop 1, four voltage detection terminals are arranged on the TVM board 2, the voltage sampling circuit 3 is connected to the voltage detection terminals, the current sampling circuit 4 includes a TMR sensor 41, and the TMR sensor 41 is arranged in a preset area around the damping loop 1; the voltage sampling circuit 3 is used to obtain the target analog voltage of the damping loop 1 and send the target analog voltage to the analog-to-digital conversion circuit 5; the current sampling circuit 4 is used to obtain the target analog current of the damping loop 1 and send the target analog current to the analog-to-digital conversion circuit 5; the analog-to-digital conversion circuit 5 is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain the target digital voltage and the target digital current, and send the target digital voltage and the target digital current to the edge server 7 through the transmission module 6; the edge server 7 is used to determine the damping parameter of the damping loop 1 according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop 1 according to the damping parameter and the damping parameter threshold.

[0068] In the embodiments of the present application, Figure 1 As shown, the system includes: a damping loop 1, a TVM board 2, a voltage sampling circuit 3, a current sampling circuit 4, an analog-to-digital conversion circuit 5, a transmission module 6 and an edge server 7. The TVM board 2 is connected in parallel with the damping loop 1. Four voltage detection terminals, namely X1, X2, X3 and X4, are arranged on the TVM board 2. The voltage sampling circuit 3 is connected to the four voltage detection terminals. The TMR sensor 41 is arranged in a preset area around the damping loop 1. The voltage sampling circuit 3 and the TMR sensor 41 are connected to one end of the analog-to-digital conversion circuit 5. The other end of the analog-to-digital conversion circuit 5 is connected to the edge server 7 through the transmission module 6.

[0069] Specifically, the edge server 7 determines the damping parameter of the damping loop 1 according to the target digital voltage and the target digital current. The damping parameter may include a damping resistor R and a damping capacitor C. For details, refer to the following formula:

[0070] ;

[0071] ;

[0072] in, , , They are the target digital voltages corresponding to the voltage detection terminals X1, X2, and X3, respectively. is the target digital current.

[0073] The obtained damping parameter is compared with the damping parameter threshold to obtain the state monitoring result.

[0074] Optionally, the voltage sampling circuit 3 may include a voltage amplifier circuit, which amplifies the initial voltage output by the voltage detection terminal to obtain an amplified voltage, and uses the amplified voltage as the target analog voltage of the damping loop 1. The voltage sampling circuit 3 may also include a voltage amplifier circuit and a low-pass filter circuit, the voltage amplifier circuit sends the amplified voltage to the low-pass filter circuit, the low-pass filter circuit filters the amplified voltage to obtain a filtered voltage, and uses the filtered voltage as the target analog voltage of the damping loop 1.

[0075] in, Figure 2 FIG. 4 is a schematic diagram of the measurement principle of a TMR sensor in an embodiment. The current sampling circuit 4 includes a TMR sensor 41. The measurement principle diagram thereof is shown in FIG. Figure 2 As shown, according to the right-hand spiral rule, when the current I0 flows through the current-carrying conductor of the damping loop 1, a spiral magnetic field B will be generated in the space near the damping loop 1, and the TMR sensor 41 that can measure the magnetic field size is fixed in a preset area of ​​the damping loop 1 (for example, the distance between the TMR sensor 41 and the current-carrying conductor is r), and the direction of the magnetic field vector generated by the current in the current-carrying conductor is consistent with the direction of the magnetic sensitive axis of the TMR sensor 41. Due to the tunneling effect in the TMR sensor 41, the magnetic sensitive resistor inside the TMR sensor 41 will change according to the magnetic field, generate a differential output voltage V0, and thus output the initial current.

[0076] In a possible implementation, the initial current output by the TMR sensor 41 is used as the target analog current. Optionally, the current sampling circuit 4 may further include a TMR sensor 41 and a current amplifying circuit, the current amplifying circuit amplifies the initial current to obtain an amplified current, and the amplified current is used as the target analog current. The current sampling circuit 4 may further include a TMR sensor 41, a current amplifying circuit and a conditioning circuit, the conditioning circuit conditioning the amplified current to obtain the target analog current.

[0077] Optionally, the analog-to-digital conversion circuit 5 may include an AD conversion circuit, which uses the AD conversion circuit to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain an initial digital voltage and an initial digital current, and uses the initial digital voltage and the initial digital current as the target digital voltage and the target digital current. The analog-to-digital conversion circuit 5 may also include an AD conversion circuit and a microprocessor, which further analyzes and processes the initial digital voltage and the initial digital current to obtain an intermediate digital voltage and an intermediate digital current, and uses the intermediate digital voltage and the intermediate digital current as the target digital voltage and the target digital current.

[0078] Optionally, the transmission module may be a short-range wireless communication module, a medium-range wireless communication module, a long-range wireless communication module, or a wired communication module. For example, the short-range wireless communication module may be a Bluetooth module, a Wi-Fi module, a ZigBee module, etc.; the medium-range wireless communication module may be a NB-IoT module, a LoRa module; and the long-range wireless communication module may be a 3G / 4G / 5G module, etc.

[0079] In an embodiment of the present application, the system includes: a damping loop, a TVM, a voltage sampling circuit, a current sampling circuit, an analog-to-digital conversion circuit, a transmission module and an edge server; the TVM board is connected in parallel with the damping loop, four voltage detection terminals are arranged on the TVM board, the voltage sampling circuit is connected to the voltage detection terminals, the current sampling circuit includes a TMR sensor, and the TMR sensor is arranged in a preset area around the damping loop; the voltage sampling circuit is used to obtain the target analog voltage of the damping loop and send the target analog voltage to the analog-to-digital conversion circuit; the current sampling circuit is used to obtain the target analog current of the damping loop and send the target analog current to the analog-to-digital conversion circuit; the analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain the target digital voltage and the target digital current, and send the target digital voltage and the target digital current to the edge server through the transmission module; the edge server is used to determine the damping parameter of the damping loop according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold. In the embodiment of the present application, the voltage detection terminal and the voltage sampling circuit on the TVM board are used to obtain the target analog voltage of the damping loop, and the TMR sensor is used to obtain the target analog current of the damping loop. The target analog voltage and the target analog current can be obtained without setting a voltage sensor and a current sensor inside the converter valve, so as to obtain the state monitoring result based on the target analog voltage and the target analog current, thereby avoiding the phenomenon that the state monitoring result of the damping loop cannot be obtained in real time due to the inability to set a voltage sensor and a current sensor inside the converter valve in the traditional technology.

[0080] Figure 3 FIG. 1 is a schematic diagram of a voltage sampling circuit in an embodiment. Figure 3 As shown, the voltage sampling circuit includes a voltage amplifier circuit 31, a low-pass filter circuit 32 and an industrial frequency trap circuit 33. The voltage amplifier circuit 31 is connected to the voltage detection terminal; the voltage amplifier circuit 31 is used to amplify the initial voltage output by the voltage detection terminal to obtain an amplified voltage, and send the amplified voltage to the low-pass filter circuit 32; the low-pass filter circuit 32 is used to filter the amplified voltage to obtain a filtered voltage, and send the filtered voltage to the industrial frequency trap circuit 33; the industrial frequency trap circuit 33 is used to filter out the voltage data of a preset frequency in the filtered voltage to obtain a target analog voltage.

[0081] Since the TVM board is connected in parallel with the damping circuit, four voltage detection terminals X1, X2, X3, and X4 are connected to the TVM board. The target analog voltage across the damping resistor and the damping capacitor in the damping circuit is measured through the voltage sampling circuit. The voltage sampling circuit is shown as follows: Figure 3As shown. Since the initial voltage output by the voltage detection end is small, the amplifier circuit can amplify the input initial voltage by a certain multiple to obtain an amplified voltage. The low-pass filter circuit 32 only allows signals below the cut-off frequency to pass through, while signals above the cut-off frequency are attenuated or suppressed to obtain a filtered voltage, making the output filtered voltage purer, reducing the fluctuation of the filtered voltage, and making the filtered voltage smoother. The power frequency trap circuit 33 filters out the power frequency interference signal of the preset frequency in the filtered voltage to obtain the target analog voltage, thereby improving the signal-to-noise ratio and performance of the system. For example, a 50HZ power frequency trap circuit is used to filter out the waveform corresponding to 50HZ in the filtered voltage to obtain the target analog voltage.

[0082] Optionally, the voltage amplifier circuit 31 may be an amplifier circuit based on a transistor, such as a bipolar transistor and a field effect transistor, which has the characteristics of high amplification factor and relatively low input impedance. The voltage amplifier circuit 31 may also be an amplifier circuit based on an operational amplifier, which has the advantages of high input impedance, low output impedance, and large amplification factor.

[0083] Optionally, the low-pass filter circuit 32 may be a first-order active low-pass filter circuit, a second-order active low-pass filter circuit, a high-order active low-pass filter circuit, etc.

[0084] Furthermore, if Figure 3 As shown, the voltage sampling circuit 3 also includes an overload indication circuit 34, which is connected to the power frequency trap circuit 33; the overload indication circuit 34 is used to receive the target analog voltage sent by the power frequency trap circuit 33, and output overload prompt information when the target analog voltage is greater than a preset voltage threshold.

[0085] In the embodiments of the present application, Figure 3 As shown, the overload indication circuit 34 can monitor the target analog voltage in real time, and when the target analog voltage exceeds the preset voltage threshold, it can output the overload prompt information in time, so as to quickly remind the user or control system of the abnormal situation, so as to take corresponding measures to prevent the fault from further expanding.

[0086] The overload indication circuit 34 can be connected to the edge server through the transmission module, and when the target analog voltage exceeds the preset voltage threshold, the system is prompted to cut off the power supply or reduce the load, thereby protecting the circuit and equipment from overload damage. For some key equipment and expensive equipment, this protection is particularly important, which can effectively extend the service life of the equipment and reduce maintenance costs.

[0087] Figure 4 FIG. 1 is a schematic diagram of a current sampling circuit in an embodiment. Figure 4As shown, the current sampling circuit 4 also includes a current amplifier circuit 42, a conditioning circuit 43 and a bias zeroing circuit 44. The first end of the current amplifier circuit 42 is connected to the TMR sensor 41, the second end of the current amplifier circuit 42 is connected to the conditioning circuit 43, and the third end of the current amplifier circuit 42 is connected to the bias zeroing circuit 44; the current amplifier circuit 42 is used to amplify the initial current collected by the TMR sensor 41 to obtain an amplified current when the bias zeroing circuit 44 provides a bias current to the current amplifier circuit 42; the conditioning circuit 43 is used to condition the amplified current to obtain a target analog current.

[0088] In the embodiment of the present application, active devices such as transistors or field effect transistors in the current amplifier circuit 42 require a suitable static operating point to normally amplify the initial current. The bias zeroing circuit 44 provides a bias current to provide an appropriate DC potential for the base (for transistors) or gate (for field effect transistors) of the active device, thereby setting a suitable static operating point. If there is no suitable bias current, the current amplifier circuit 42 may produce nonlinear distortion due to improper static operating point setting. For example, when the transistor enters the saturation region or the cut-off region, the input initial current will be clipped, resulting in distortion of the output amplified current. The bias current provided by the bias zeroing circuit 44 can ensure that the transistor operates in the amplification region, so that the input initial current and the output amplified current maintain a good linear relationship, thereby reducing distortion.

[0089] Optionally, the current amplifier circuit 42 may include one amplifier circuit or multiple amplifier circuits. For example, the current amplifier circuit 42 includes a primary amplifier circuit and a secondary amplifier circuit, and a corresponding bias zeroing circuit 44 is provided for both the primary amplifier circuit and the secondary amplifier circuit.

[0090] The conditioning circuit 43 may be a proportional-integral-derivative (PID) conditioning circuit, which can accurately regulate and stably control the amplified current through the synergistic effect of the three links of proportionality, integration, and differentiation to obtain the target analog current. For example, the proportional link can quickly respond to changes in the amplified current. When the amplified current deviates from the set current, the proportional regulator will immediately generate a regulation signal proportional to the current deviation, prompting the actuator (such as a regulating tube, etc.) to adjust the amplified current.

[0091] Furthermore, if Figure 4 As shown, the current sampling circuit 4 also includes a temperature compensation circuit 45, which is connected to the TMR sensor 41; the temperature compensation circuit 45 is used to compensate the temperature of the TMR sensor 41 when the temperature of the TMR sensor 41 is not within a preset temperature range.

[0092] In the embodiment of the present application, the sensitivity of the TMR sensor 41 changes with temperature. In the absence of the temperature compensation circuit 45, when the ambient temperature changes, the initial current output by the TMR sensor may deviate due to the change in sensitivity. The temperature compensation circuit 45 can offset the sensitivity change caused by temperature change by introducing an appropriate compensation mechanism, such as the combination of positive temperature coefficient and negative temperature coefficient elements, so that the sensitivity of the TMR sensor 41 at different temperatures remains relatively stable. For example, in some high-precision magnetic field measurement applications, the sensitivity of the TMR sensor 41 may decrease by a certain proportion every time the temperature rises to a certain degree. The temperature compensation circuit 45 can detect this temperature change and generate a corresponding compensation signal so that the initial current outputted at the end is not affected or less affected by this sensitivity change.

[0093] Figure 5 FIG. 1 is a schematic diagram of a damping circuit state monitoring system in another embodiment. Figure 5 As shown, the analog-to-digital conversion circuit includes an AD conversion circuit 51, a microprocessor 52 and a TTL conversion module 53; the AD conversion circuit 51 is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain an initial digital voltage and an initial digital current, and send the initial digital voltage and the initial digital current to the microprocessor 52; the microprocessor 52 is used to read and process the initial digital voltage and the initial digital current to obtain an intermediate digital voltage and an intermediate digital current, and send the intermediate digital voltage and the intermediate digital current to the TTL conversion module 53; the TTL conversion module 53 is used to convert the intermediate digital voltage and the intermediate digital current into a level signal that complies with the TTL standard to obtain the target digital voltage and the target digital current.

[0094] In the embodiment of the present application, due to the limited internal space of the circulating valve, it is impossible to arrange an additional optical fiber transceiver on the TVM board 2, and it is difficult to transmit signals through optical fiber. Therefore, the present application designs an analog-to-digital conversion circuit 5 integrating an AD conversion circuit 51, a microprocessor 52, and a TIL conversion module 53 to convert the target analog voltage and the target analog current into the target digital voltage and the target digital current. Figure 6 As shown, the signal processing circuit includes the above Figure 4 The current amplifier circuit 42, the conditioning circuit 43, the bias zero adjustment circuit 44 and the temperature compensation circuit 45 are shown.

[0095] Optionally, the AD conversion circuit can be The microprocessor is equipped with a high-performance computing core with a maximum clock rate of 32MHz and 128KB of Flash storage space.

[0096] Target analog current, target analog voltage After the analog-to-digital converter converts the initial digital current and initial digital voltage, the digital current and initial digital voltage are transmitted to the microprocessor 52 through the SPI protocol, and then the microprocessor 52 automatically converts the digital current and initial digital voltage into the initial digital voltage. The initial digital current and initial digital voltage sent by the analog-to-digital converter are processed to obtain an intermediate digital voltage and an intermediate digital current, and the intermediate digital voltage and the intermediate digital current are transmitted to the TTL conversion module 53 through the serial port. The TTL conversion module 53 converts the intermediate digital voltage and the intermediate digital current into level signals that comply with the TTL standard to obtain a target digital voltage and a target digital current that can be recognized by the transmission module 6. The transmission module 6 transmits the target digital voltage and the target digital current to the backend edge server.

[0097] Figure 6 is a schematic diagram of a laser power supply circuit in an embodiment, combined with Figure 5 As shown, the system also includes a laser power supply circuit 8, such as Figure 6 As shown, the laser power supply circuit 8 includes a light source 81, a photoelectric conversion circuit 82 and a voltage stabilizing circuit 83; the photoelectric conversion circuit 82 is used to convert the optical signal emitted by the light source 81 into an electrical signal, and supply power to the voltage sampling circuit 3, the current sampling circuit 4 and the analog-to-digital conversion circuit 5 through the voltage stabilizing circuit 83.

[0098] In the embodiment of the present application, due to the large power consumption, it is impossible to draw power from both sides of the thyristor of the damping circuit. If the capacitor is used to draw power, the line impedance will be changed. Therefore, the present application adopts a laser power supply method to power the voltage sampling circuit 3, the current sampling circuit 4 and the analog-to-digital conversion circuit 5. The laser power supply method is to use a light source 81 ( Figure 6 The light source 81 shown includes a laser diode (LD) which emits light and passes through a photoelectric conversion circuit 82 ( Figure 6 The photoelectric conversion circuit 82 shown includes a photodiode (PD) that converts an optical signal into an electrical signal, and stabilizes the electrical signal output by the photoelectric conversion circuit 82 through a voltage stabilizing circuit 83 (DC-DC converter), thereby providing power for the voltage sampling circuit 3, the current sampling circuit 4 and the analog-to-digital conversion circuit 5.

[0099] Figure 7 FIG. 1 is a flow chart of a damping circuit state monitoring method in an embodiment. Figure 7 As shown, the edge server is also used to send status monitoring results and damping parameters to the cloud server, so that when the status monitoring results are abnormal, the cloud server can update the damping parameter threshold according to the status monitoring results and damping parameters to obtain a new damping parameter threshold; and receive the new damping parameter threshold sent by the cloud server.

[0100] In the embodiment of the present application, the edge server collects the target digital voltage and target digital current, and stores them in a specific address in the form of a COMTRADE recording file, which is convenient for subsequent data extraction and processing. The COMTRADE recording file includes at most four related files: 1) header file (.HDR); 2) configuration file (.CFG); 3) data file (.DAT); 4) information file (.INF). To obtain the target digital voltage and target digital current for analysis, they must be read out in the specified format. The COMTRADE recording file reading process is as follows: Figure 8 shown.

[0101] After reading the COMTRADE recording file, the target digital voltage and target digital current are obtained, such as Figure 7 As shown, the edge server detects and repairs the abnormal data in the target digital voltage and the target digital current. The damping parameters are determined based on the repaired target digital voltage and the target digital current. The damping parameters and status monitoring results are packaged and uploaded to the self-learning diagnosis model of the cloud server.

[0102] After receiving the status monitoring results and damping parameters uploaded by the edge server, the self-learning diagnosis model records the data damping parameters and status monitoring results in the data set of the cloud server. The self-learning diagnosis model includes a fault tracing model and a parameter update model.

[0103] When the state monitoring results are abnormal, the fault tracing model combines the damping parameters and the state monitoring results to trace the fault. When the abnormal state monitoring results accumulate to a certain scale, the on-site operation personnel verify the abnormal state monitoring results. When the verification is completed, the fault tracing model and parameter update model can be trained based on the abnormal state monitoring results and damping parameters to update the damping parameter threshold, and then the new damping parameter threshold is sent to the edge server through the data communication network.

[0104] In an exemplary embodiment, Fig. 9 As shown, a damping circuit state monitoring method is provided, and the method is applied to Figure 1 The edge server in the example is used for explanation, including the following S901 to S902. Among them:

[0105] S901, obtaining a target digital voltage and a target digital current of the damping loop; the target digital voltage and the target digital current are obtained by performing analog-to-digital conversion on the target analog voltage of the damping loop sent by the voltage sampling circuit and the target analog current of the damping loop sent by the current sampling circuit by the analog-to-digital conversion circuit;

[0106] S902, determining a damping parameter of the damping loop according to the target digital voltage and the target digital current, and determining a state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold.

[0107] In the above damping loop state monitoring method, the target digital voltage and target digital current of the damping loop are obtained, the damping parameter of the damping loop is determined according to the target digital voltage and the target digital current, and the state monitoring result of the damping loop is determined according to the damping parameter and the damping parameter threshold. In the embodiment of the present application, the voltage detection terminal and the voltage sampling circuit on the TVM board are used to obtain the target analog voltage of the damping loop, and the target analog current of the damping loop is obtained by using the TMR sensor. The target analog voltage and the target analog current can be obtained without setting a voltage sensor and a current sensor inside the converter valve, so that the state monitoring result is obtained based on the target analog voltage and the target analog current, avoiding the phenomenon that the state monitoring result of the damping loop cannot be obtained in real time due to the inability to set a voltage sensor and a current sensor inside the converter valve in the traditional technology.

[0108] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0109] Based on the same inventive concept, the embodiment of the present application also provides a damping circuit state monitoring device for implementing the damping circuit state monitoring method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations of one or more damping circuit state monitoring device embodiments provided below can refer to the limitations of the damping circuit state monitoring method above, and will not be repeated here.

[0110] In an exemplary embodiment, Fig.10 As shown, a damping circuit state monitoring device is provided, including: an acquisition module 1011 and a determination module 1012, wherein:

[0111] The acquisition module 1011 is used to acquire the target digital voltage and target digital current of the damping loop; the target digital voltage and target digital current are obtained by performing analog-to-digital conversion on the target analog voltage of the damping loop sent by the voltage sampling circuit and the target analog current of the damping loop sent by the current sampling circuit by the analog-to-digital conversion circuit;

[0112] The determination module 1012 is used to determine the damping parameter of the damping loop according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold.

[0113] In one embodiment, the determination module 1012 is specifically used to send the state monitoring result and the damping parameter to the cloud server, so that the cloud server updates the damping parameter threshold according to the state monitoring result and the damping parameter when the state monitoring result is abnormal, and obtains a new damping parameter threshold;

[0114] Receive the new damping parameter threshold sent by the cloud server.

[0115] Each module in the damping circuit state monitoring device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in an edge server in the form of hardware, or can be stored in a memory in the edge server in the form of software, so that the processor can call and execute operations corresponding to each module.

[0116] In an exemplary embodiment, an edge server is provided. The edge server may be a server, and its internal structure diagram may be as shown in FIG. Fig.11 As shown. The edge server includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the edge server is used to provide computing and control capabilities. The memory of the edge server includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the edge server is used to store relevant data for status monitoring. The input / output interface of the edge server is used to exchange information between the processor and an external device. The communication interface of the edge server is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a damping circuit status monitoring method is implemented.

[0117] Those skilled in the art will understand that Fig.11The structure shown in the figure is only a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the edge server to which the solution of the present application is applied. The specific edge server may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0118] In an exemplary embodiment, an edge server is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps of any of the above method embodiments when executing the computer program.

[0119] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above method embodiments are implemented.

[0120] In one embodiment, a computer program product is provided, including a computer program, which implements the steps of any of the above method embodiments when executed by a processor.

[0121] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0122] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0123] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A damping circuit state monitoring system, characterized in that: The system includes: a damping loop, a TVM board, a voltage sampling circuit, a current sampling circuit, an analog-to-digital conversion circuit, a transmission module and an edge server; the TVM board is connected in parallel with the damping loop, four voltage detection terminals are arranged on the TVM board, the voltage sampling circuit is connected to the voltage detection terminals, the current sampling circuit includes a TMR sensor, and the TMR sensor is arranged in a preset area around the damping loop; The voltage sampling circuit is used to obtain the target analog voltage of the damping loop and send the target analog voltage to the analog-to-digital conversion circuit; The current sampling circuit is used to obtain the target analog current of the damping loop and send the target analog current to the analog-to-digital conversion circuit; The analog-to-digital conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain a target digital voltage and a target digital current, and send the target digital voltage and the target digital current to the edge server through the transmission module; The edge server is used to determine the damping parameter of the damping loop according to the target digital voltage and the target digital current, and determine the state monitoring result of the damping loop according to the damping parameter and the damping parameter threshold.

2. The system according to claim 1, characterized in that The voltage sampling circuit comprises a voltage amplifying circuit, a low-pass filtering circuit and an industrial frequency trap circuit, and the voltage amplifying circuit is connected to the voltage detecting terminal; The voltage amplifying circuit is used to amplify the initial voltage output by the voltage detecting terminal to obtain an amplified voltage, and send the amplified voltage to the low-pass filtering circuit; The low-pass filter circuit is used to filter the amplified voltage to obtain a filtered voltage, and send the filtered voltage to the power frequency trap circuit; The power frequency trap circuit is used to filter out the voltage data of a preset frequency in the filtered voltage to obtain the target analog voltage.

3. The system according to claim 2, characterized in that The voltage sampling circuit also includes an overload indication circuit, and the overload indication circuit is connected to the power frequency trap circuit; The overload indication circuit is used to receive the target analog voltage sent by the power frequency trap circuit, and output overload prompt information when the target analog voltage is greater than a preset voltage threshold.

4. The system according to claim 1, characterized in that The current sampling circuit also includes a current amplifying circuit, a conditioning circuit and a bias zeroing circuit, wherein a first end of the current amplifying circuit is connected to the TMR sensor, a second end of the current amplifying circuit is connected to the conditioning circuit, and a third end of the current amplifying circuit is connected to the bias zeroing circuit; The current amplifying circuit is used to amplify the initial current collected by the TMR sensor to obtain an amplified current when the bias zeroing circuit provides a bias current to the current amplifying circuit; The conditioning circuit is used to condition the amplified current to obtain the target analog current.

5. The system according to claim 1, characterized in that The current sampling circuit also includes a temperature compensation circuit, and the temperature compensation circuit is connected to the TMR sensor; The temperature compensation circuit is used to compensate the temperature of the TMR sensor when the temperature of the TMR sensor is not within a preset temperature range.

6. The system according to claim 1, characterized in that The analog-to-digital conversion circuit includes an AD conversion circuit, a microprocessor and a TTL conversion module; The AD conversion circuit is used to perform analog-to-digital conversion on the target analog voltage and the target analog current to obtain an initial digital voltage and an initial digital current, and send the initial digital voltage and the initial digital current to the microprocessor; The microprocessor is used to read and process the initial digital voltage and the initial digital current, obtain an intermediate digital voltage and an intermediate digital current, and send the intermediate digital voltage and the intermediate digital current to the TTL conversion module; The TTL conversion module is used to convert the intermediate digital voltage and the intermediate digital current into level signals that comply with the TTL standard to obtain the target digital voltage and the target digital current.

7. The system according to claim 1, characterized in that The system further comprises a laser power supply circuit, wherein the laser power supply circuit comprises a light source, a photoelectric conversion circuit and a voltage stabilization circuit; The photoelectric conversion circuit is used to convert the optical signal emitted by the light source into an electrical signal, and to supply power to the voltage sampling circuit, the current sampling circuit and the analog-to-digital conversion circuit through the voltage stabilizing circuit.

8. The system according to claim 1, characterized in that The edge server is further configured to send the state monitoring result and the damping parameter to the cloud server, so that the cloud server can update the damping parameter threshold according to the state monitoring result and the damping parameter when the state monitoring result is abnormal, so as to obtain a new damping parameter threshold; Receive a new damping parameter threshold sent by the cloud server.

9. A damping circuit state monitoring method, characterized in that: The method is applied to an edge server in a damping circuit state monitoring system according to any one of claims 1 to 8; the method comprises: Acquire a target digital voltage and a target digital current of the damping loop; the target digital voltage and the target digital current are obtained by performing analog-to-digital conversion on the target analog voltage of the damping loop sent by the voltage sampling circuit and the target analog current of the damping loop sent by the current sampling circuit by an analog-to-digital conversion circuit; A damping parameter of the damping loop is determined according to the target digital voltage and the target digital current, and a state monitoring result of the damping loop is determined according to the damping parameter and a damping parameter threshold.

10. An edge server, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to claim 9 are implemented.

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