Multi-state data synchronous acquisition system and device for wind generating set

Abstract

The invention belongs to the technical field of data acquisition of wind generating sets, and particularly relates to a multi-state data synchronous acquisition system and device of a wind generating set, which comprises a power supply conversion module, a control module, an edge calculation module, a data acquisition module and a signal processing module, the data acquisition module is connected with the signal processing module; the control module is connected with the signal processing module; the control module is connected with the edge calculation module; the edge calculation module is used for conducting fault judgment and health degree prediction on the wind generating set and returning the result to the control module, and the control module sends the received fault judgment and health degree prediction result to an external terminal connected with the control module. The state information of the wind generating set can be monitored in real time and synchronously collected, and fault judgment and health degree prediction of the wind generating set are achieved by analyzing data.

Description

Technical Field

[0001] The present invention belongs to the technical field of data collection of wind turbine generator sets, and in particular relates to a system and device for synchronously collecting multi-state data of wind turbine generator sets. Background Art

[0002] As the global demand for renewable energy continues to increase, wind power generation, as a clean and renewable form of energy, is gradually becoming one of the important means to solve energy shortages and environmental pollution. However, with the rapid growth of wind turbines, the problem of wind turbine failure has become increasingly prominent. Wind turbines usually operate at high altitudes and in harsh environmental conditions, and are long-term affected by strong winds and climate change. These external factors have brought various challenges to the operation and performance of wind turbines. The failure of the generator will not only lead to a decrease in power generation capacity, but may also cause serious losses and safety hazards. Therefore, it is crucial to conduct timely fault detection and maintenance of wind turbines.

[0003] At present, the fault diagnosis equipment for wind turbines mainly judges fault information by threshold after transmitting data through the network, such as the patent publication number "CN108957315A", which is named the fault diagnosis method and equipment of wind turbines. This patent sets the detection point and the preset fault signal, and compares the two to make a threshold judgment. For example, the patent publication number "CN108226775B", which is named the fault self-detection method and device of wind turbines, compares and analyzes the component information corresponding to the preset data structure tree and the operating data. However, all of the above technologies have the following disadvantages:

[0004] 1. It is impossible to collect real-time data of wind turbines. The sampled data are all valid values, and the data has lags;

[0005] 2. Low integration, unable to collect real-time motor vibration waveform, temperature data, current data, and voltage data at the same time;

[0006] 3. Fault interpretation is based on effective value threshold judgment, the judgment system is simple and prone to false fault alarms.

[0007] In view of this, the present inventor provides a system and device for synchronously collecting multi-state data of a wind turbine generator set to solve the above technical problems. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and propose a wind turbine multi-state data synchronous acquisition system and device, which is equipped with multiple sensors and realizes accurate acquisition of the operating status and performance parameters of the wind turbine through multi-dimensional data acquisition strategy, high sampling rate function and high-precision synchronous sampling.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] On the one hand, the present invention provides a wind turbine generator multi-state data synchronous acquisition system, including a power conversion module, a control module, an edge computing module, a data acquisition module and a signal processing module;

[0011] The data acquisition module is connected to the signal processing module and is used to transmit the collected wind turbine generator set data to the signal processing module for processing;

[0012] The control module is connected to the signal processing module and is used to collect the wind turbine generator set data processed by the signal processing module, and decompose and store the data;

[0013] The control module is connected to the edge computing module and is used to send the decomposed and stored data to the edge computing module;

[0014] The edge computing module is used to perform fault judgment and health prediction of the wind turbine generator set and return them to the control module, and the control module sends the received fault judgment and health prediction results to an external terminal connected to the control module;

[0015] The control module, edge computing module and data acquisition module are all connected to the power conversion module.

[0016] Further, the data acquisition module includes a voltage sensor, a current sensor, a temperature sensor, an acceleration sensor and a rotation speed sensor for monitoring the operating status of the wind turbine generator set;

[0017] The voltage sensor, current sensor, temperature sensor, acceleration sensor and rotation speed sensor are all connected to the signal processing module and the power conversion module.

[0018] Furthermore, the signal processing module includes sampling circuit modules respectively connected to the voltage sensor, current sensor, temperature sensor, acceleration sensor and speed sensor, each sampling circuit module is connected to an analog-to-digital converter, and each analog-to-digital converter is connected to the control module.

[0019] Furthermore, the control module includes an FPGA chip and an ARM chip connected to the FPGA chip, each of the analog-to-digital converters is connected to the FPGA chip, and the FPGA chip is connected to a power conversion module, and the ARM chip is respectively connected to an edge computing module and a power conversion module.

[0020] Further, the power conversion module includes an isolated power supply U1 and a first circuit connected to the input end of the isolated power supply U1, the first circuit includes a common-mode filter inductor T1, a pin P1 of the first winding of the common-mode filter inductor T1 is connected to the first pin of the isolated power supply U1, a pin P2 of the first winding of the common-mode filter inductor T1 is connected to the cathode of the diode D1, a positive electrode of the diode D1 is connected to the fuse F1, a node A between the fuse F1 and the diode D1 is grounded via a capacitor C3, a varistor R1 is connected in parallel at both ends of the capacitor C3, point A is equipotential with the diode D1, a pin P3 of the second winding of the common-mode filter inductor T1 is connected to the second pin of the isolated power supply U1, a pin P4 of the second winding of the common-mode filter inductor T1 is grounded via a capacitor C2, and both ends of the capacitor C2 are connected in parallel with a varistor R1. The A point is equipotential with the diode D1, and the pin P3 of the second winding of the common-mode filter inductor T1 is connected to the second pin of the isolated power supply U1. The pin P4 of the second winding of the common-mode filter inductor T1 is grounded via a capacitor C2. A varistor R2 is connected in parallel, a TVS tube D4, a TVS tube D3 and a support capacitor C4 are connected in parallel in sequence between the first pin and the second pin of the isolated power supply U1 and in the direction from the isolated power supply U1 to the common-mode filter inductor T1, and a first end of the support capacitor C4 is connected to the pin P1 of the first winding of the common-mode filter inductor T1, and a second end is connected to the pin P3 of the second winding of the common-mode filter inductor T1, a TVS tube D2, a varistor R5, a varistor R4, a varistor R3 and a capacitor C1 are connected in parallel in sequence between the pin P2 of the first winding of the common-mode filter inductor T1 and the pin P4 of the second winding of the common-mode filter inductor T1, the diode D1 is located between the node B and the node C, the first end of the capacitor C1 is connected between the fuse F1 and the node A, and the second end is grounded via the capacitor C2;

[0021] A support capacitor C7, a capacitor C8 and a capacitor C9 are sequentially connected in parallel between the third pin and the fifth pin of the isolated power supply U1;

[0022] A capacitor C5 is connected between the second pin and the fifth pin of the isolated power supply U1 , and a capacitor C6 is connected between the first pin and the third pin of the isolated power supply U1 .

[0023] Furthermore, the sampling circuit modules respectively connected to the voltage sensor, the current sensor and the rotation speed sensor are the same;

[0024] Wherein, the sampling circuit module connected to the voltage sensor includes a resistor R6, a first operational amplifier circuit and a low-pass filter circuit, the first operational amplifier circuit and the low-pass filter circuit are connected through a resistor R7, the upper end of the resistor R6 is respectively connected to the first end of the resistor R8 and the positive input end of the first operational amplifier circuit, the lower end of the resistor R6 is grounded, the second end of the resistor R8 is connected to the voltage sensor, the reverse input end and the output end of the first operational amplifier circuit are both connected to the first end of the resistor R7, and the second end of the resistor R7 is connected to the low-pass filter circuit;

[0025] The low-pass filter circuit includes a second operational amplifier circuit, a capacitor C10, a resistor R9, a resistor R10, a resistor R11, and a capacitor C11; the upper end of the capacitor C10 is respectively connected to the first end of the resistor R9 and the positive input end of the second operational amplifier circuit, the lower end of the capacitor C10 is grounded, the second end of the resistor R9 is connected to the second end of the resistor R7, the reverse input end of the second operational amplifier circuit is respectively connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is connected to the lower end of the capacitor C10, the second end of the resistor R11 is connected to the output end of the second operational amplifier circuit, the first end of the capacitor C11 is connected to the node D, and the second end of the capacitor C11 is connected to the output end of the second operational amplifier circuit;

[0026] The output end of the second operational amplifier circuit is connected to the corresponding analog-to-digital converter.

[0027] Furthermore, the sampling circuit module connected to the acceleration sensor includes a third operational amplifier circuit, the reverse input end of the third operational amplifier circuit is respectively connected to the first end of the resistor R12 and the first end of the resistor R13, the second end of the resistor R12 is connected to the power supply U2 via the capacitor C12, the second end of the resistor R13 is grounded, the acceleration sensor is connected between the left end of the capacitor C12 and the second end of the resistor R13, and the positive input end and the output end of the third operational amplifier circuit are both connected to the corresponding analog-to-digital converter.

[0028] Furthermore, the sampling circuit module connected corresponding to the temperature sensor includes a fourth operational amplifier circuit, the positive input terminal of the fourth operational amplifier circuit is connected to the first end of the resistor R14, the second end of the resistor R14 is connected to the power supply U3, the positive input terminal and the output terminal of the fourth operational amplifier circuit are both connected to the corresponding analog-to-digital converter, the reverse input terminal of the fourth operational amplifier circuit is connected to the first end of the resistor R15, the second end of the resistor R15 is connected to the first end of the temperature sensor, the second end of the temperature sensor is grounded, and a resistor R18 is connected between the second end of the resistor R14 and the second end of the resistor R15.

[0029] On the other hand, the present invention provides a device for synchronously collecting multi-state data of a wind generator set, comprising a box, in which the above-mentioned synchronously collecting multi-state data of a wind generator set is arranged.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The invention provides a wind turbine generator multi-state data synchronous acquisition system, which realizes online monitoring and synchronous acquisition of the operating status of the wind turbine generator by setting multiple sensors, control modules, edge computing modules and signal processing modules, and classifies and analyzes the collected data in real time. This comprehensive analysis can effectively enhance the judgment of the fault location, improve the accuracy and reliability of fault judgment, and provide comprehensive and accurate data support for operation and maintenance personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are incorporated in and constitute a part of this specification and, together with the description, serve to explain the principles of the present invention.

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 It is a structural schematic diagram of the wind turbine generator multi-state data synchronous acquisition system of the present invention;

[0035] Figure 2 It is a circuit diagram of a power conversion module in the wind turbine generator multi-state data synchronous acquisition system of the present invention;

[0036] Figure 3 It is a sampling circuit module in the multi-state data synchronous acquisition system of the wind turbine generator set of the present invention (a sampling circuit module connected to the voltage sensor in correspondence);

[0037] Figure 4 It is a sampling circuit module in the multi-state data synchronous acquisition system of the wind turbine generator set of the present invention (a sampling circuit module connected to the acceleration sensor in correspondence);

[0038] Figure 5 It is a sampling circuit module in the multi-state data synchronous acquisition system of the wind turbine generator set of the present invention (a sampling circuit module connected to the temperature sensor in correspondence);

[0039] Figure 6 This is the synchronous sampling process in the wind turbine generator multi-state data synchronous acquisition system of the present invention.

[0040] Among them: 1 is a power conversion module; 2 is a control module; 3 is an edge computing module; 4 is a data acquisition module; 5 is a signal processing module; 51 is a first operational amplifier circuit; 52 is a low-pass filter circuit; 53 is a fourth operational amplifier circuit; 54 is a third operational amplifier circuit; 21 is an FPGA chip; 22 is an ARM chip; 41 is a voltage sensor; 42 is a current sensor; 43 is a temperature sensor; 44 is an acceleration sensor; 45 is a speed sensor; 521 is a second operational amplifier circuit. DETAILED DESCRIPTION

[0041] Here, exemplary embodiments will be described in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples consistent with some aspects of the present invention described in detail in the appended claims.

[0042] On the one hand, see Figures 1 to 5 , an embodiment of the present invention provides a wind turbine generator multi-state data synchronous acquisition system, including a power conversion module 1, a control module 2, an edge computing module 3, a data acquisition module 4 and a signal processing module 5;

[0043] The data acquisition module 4 is connected to the signal processing module 5 and is used to transmit the collected wind turbine generator set data to the signal processing module 5 for processing;

[0044] The control module 2 is connected to the signal processing module 5 and is used to collect the wind turbine generator set data processed by the signal processing module 5, and decompose and store the data;

[0045] The control module 2 is connected to the edge computing module 3 and is used to send the decomposed and stored data to the edge computing module 3;

[0046] The edge computing module 3 is used to perform fault judgment and health prediction of the wind turbine generator set and return it to the control module 2, and the control module 2 sends the received fault judgment and health prediction results to an external terminal connected to the control module 2; specifically, the external terminal here can be a wirelessly connected server, tablet, mobile phone, or a wired industrial computer and other devices;

[0047] The control module 2 , the edge computing module 3 and the data acquisition module 4 are all connected to the power conversion module 1 .

[0048] Furthermore, the data acquisition module 4 includes a voltage sensor 41, a current sensor 42, a temperature sensor 43, an acceleration sensor 44 and a rotation speed sensor 45 for monitoring the operating status of the wind turbine generator set;

[0049] The voltage sensor 41 , the current sensor 42 , the temperature sensor 43 , the acceleration sensor 44 and the rotation speed sensor 45 are all connected to the signal processing module 5 and the power conversion module 1 .

[0050] Specifically, the voltage sensor 41 is used to monitor the real-time voltage of the wind turbine generator set, the current sensor 42 is used to monitor the real-time current of the wind turbine generator set, and the temperature sensor 43 is used to monitor the real-time temperature of the wind turbine generator set; the acceleration sensor 44 is used to monitor the single-axis acceleration of the wind turbine generator set in real time, and the speed sensor 45 is used to monitor the generator speed of the wind turbine generator set in real time.

[0051] Furthermore, the signal processing module 5 includes sampling circuit modules respectively connected to the voltage sensor 41, the current sensor 42, the temperature sensor 43, the acceleration sensor 44 and the speed sensor 45, each sampling circuit module is connected to an analog-to-digital converter, and each analog-to-digital converter is connected to the control module 2.

[0052] Specifically, in this embodiment, the analog-to-digital converter may be ADC ADS7606 or ADC ADCS7476.

[0053] Furthermore, the control module 2 includes an FPGA chip 21 and an ARM chip 22 connected to the FPGA chip 21, each analog-to-digital converter is connected to the FPGA chip 21, and the FPGA chip 21 is connected to the power conversion module 1, and the ARM chip 22 is electrically connected to the edge computing module 3 and the power conversion module 1 respectively.

[0054] Specifically, the ARM chip 22 is a chip based on the ARM architecture, and the FPGA chip 21 is connected to the ARM chip 22 via an EIM bus; the ARM chip 22 is connected to the edge computing module 3 via ETH (Ethernet), and can also be connected via CAN bus, USB interface or other communication methods.

[0055] In this embodiment, the control module 2 adopts FPGA+ARM architecture, the FPGA chip 21 controls the analog-to-digital converter to realize the sampling function, the FPGA chip 21 and the ARM chip 22 use the EIM bus for data communication, and the ARM chip 22 controls the communication peripheral chips, including the CAN transceiver, the Ethernet physical chip, etc. Specifically, after the ARM chip 22 sends the instruction information to the FPGA chip 21, the FPGA chip 21 executes the collection task and sends the collected data to the ARM chip 22.

[0056] The power conversion module 1 fully considers the EMI and EMC requirements of the power supply. Specifically, Figure 2As shown, the power conversion module 1 includes an isolated power supply U1 and a first circuit connected to the input end of the isolated power supply U1, the first circuit includes a common-mode filter inductor T1, a pin P1 of the first winding of the common-mode filter inductor T1 is connected to the first pin (+VIN) of the isolated power supply U1, a pin P2 of the first winding of the common-mode filter inductor T1 is connected to the cathode of a diode D1, a positive pole of the diode D1 is connected to a fuse F1, a node A between the fuse F1 and the diode D1 is grounded via a capacitor C3, a varistor R1 is connected in parallel at both ends of the capacitor C3, the node A is equipotential with the diode D1, a pin P3 of the second winding of the common-mode filter inductor T1 is connected to the second pin (-VIN) of the isolated power supply U1, a pin P4 of the second winding of the common-mode filter inductor T1 is grounded via a capacitor C2, and the capacitor C2 A varistor R2 is connected in parallel at both ends of the isolation power supply U1, a TVS tube D4, a TVS tube D3 and a support capacitor C4 are connected in parallel in sequence between the first pin and the second pin of the isolation power supply U1 and in the direction from the isolation power supply U1 to the common-mode filter inductor T1, and the first end of the support capacitor C4 is connected to the pin P1 of the first winding of the common-mode filter inductor T1, and the second end is connected to the pin P3 of the second winding of the common-mode filter inductor T1, and the TVS tube D2, the varistor R5, the varistor R4, the varistor R3 and the capacitor C1 are connected in parallel in sequence between the pin P2 of the first winding of the common-mode filter inductor T1 and the pin P4 of the second winding of the common-mode filter inductor T1, the diode D1 is located between the node B and the node C, the first end of the capacitor C1 is connected between the fuse F1 and the node A, and the second end is grounded through the capacitor C2;

[0057] A support capacitor C7, a capacitor C8 and a capacitor C9 are sequentially connected in parallel between the third pin (+Vout) and the fifth pin (-Vout) of the isolated power supply U1;

[0058] A capacitor C5 is connected between the second pin and the fifth pin of the isolated power supply U1 , and a capacitor C6 is connected between the first pin and the third pin of the isolated power supply U1 .

[0059] In this embodiment, the input end of the isolated power supply U1 is provided with a fuse F1, a varistor R1, R2, R3, R4, R5, and a TVS tube D2, D3, and D4 to ensure that the above devices can effectively protect the safety of the system when the input voltage fluctuates. D1 is an anti-reverse connection diode to ensure that when the power supply is reversed, the system input power is cut off and does not cause the power module to burn out. The common-mode filter inductor T1 is used to prevent high-frequency interference from the power supply side from entering the system and affecting the stability of the system. The supporting capacitors C4 and C7 are used to ensure that when the power supply suddenly drops, the system is shut down due to a sudden power failure. C6, C5, C3, and C2 are safety capacitors, and C8 and C9 are filter capacitors.

[0060] In this embodiment, the power conversion module 1 converts the input 24V power supply into a front-to-back isolated 24V, ±15V, 5V or 12V power supply required by the acquisition system.

[0061] like Figure 3 As shown, the sampling circuit modules corresponding to the voltage sensor 41, the current sensor 42 and the speed sensor 45 are all the same, and the capacitance and resistance parameters of each sampling circuit module need to be determined according to the sensors connected in the circuit;

[0062] The sampling circuit module connected to the voltage sensor 41 includes a resistor R6, a first operational amplifier circuit 51 and a low-pass filter circuit 52. The first operational amplifier circuit 51 is connected to the low-pass filter circuit 52 through a resistor R7. The upper end of the resistor R6 is respectively connected to the first end of the resistor R8 and the positive input end of the first operational amplifier circuit 51. The lower end of the resistor R6 is grounded. The second end of the resistor R8 is connected to the voltage sensor 41. The reverse input end and the output end of the first operational amplifier circuit 51 are both connected to the first end of the resistor R7. The second end of the resistor R7 is connected to the low-pass filter circuit 52.

[0063] The low-pass filter circuit 52 includes a second operational amplifier circuit 521, a capacitor C10, a resistor R9, a resistor R10, a resistor R11, and a capacitor C11; the upper end of the capacitor C10 is respectively connected to the first end of the resistor R9 and the positive input end of the second operational amplifier circuit 521, the lower end of the capacitor C10 is grounded, the second end of the resistor R9 is connected to the second end of the resistor R7, the reverse input end of the second operational amplifier circuit 521 is respectively connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is connected to the lower end of the capacitor C10, the second end of the resistor R11 is connected to the output end of the second operational amplifier circuit 521, the first end of the capacitor C11 is connected to the node D, and the second end of the capacitor C11 is connected to the output end of the second operational amplifier circuit 521;

[0064] The output terminal of the second operational amplifier circuit 521 is connected to the ADC ADS7606.

[0065] In this embodiment, the sampling circuit modules of the voltage sensor 41, the current sensor 42 and the speed sensor 45 are the same, and can be adapted to the current sensor 42, the voltage sensor 41 and the speed sensor 45. The sampling circuit module converts the sensor input voltage or current signal through the input resistor R8; the input signal is amplified through the first operational amplifier circuit 51 to match the system. According to the bandwidth requirements, a low-pass filter circuit 52 is designed to filter out high-frequency interference signals, -3dB~10kHz, and input the effective signal to the analog-to-digital converter.

[0066] The present invention adopts high sampling rate sampling. According to the sampling circuit modules correspondingly connected to the voltage sensor 41, the current sensor 42 and the speed sensor 45, the channel calculation formula is as follows:

[0067] The voltage signal sampling rate is 16 bits, and the calculation formula is as follows:

[0068]

[0069] V r -------Actual sampling voltage;

[0070] k---------Sensor proportional coefficient;

[0071] code v ----The sampling device reads data;

[0072] V ADC ----ADC chip reference voltage;

[0073] GAIN---Circuit gain.

[0074] The current signal sampling rate is 16 bits, and the calculation formula is as follows:

[0075]

[0076] I r -------Actual sampling voltage;

[0077] k---------Sensor proportional coefficient;

[0078] code i ----The sampling device reads data;

[0079] V ADC ----ADC chip reference voltage;

[0080] GAIN---Circuit gain.

[0081] The velocity sampling rate is 12 bits, and the calculation formula is as follows:

[0082]

[0083] f x -------------Actual square wave frequency;

[0084] f n -------------Actual square wave count within t time;

[0085] F x ------------Compare with square wave given frequency;

[0086] Fn------------Compare square wave counts within t time.

[0087] like Figure 4 As shown, the sampling circuit module corresponding to the acceleration sensor 44 includes a third operational amplifier circuit 54, the reverse input end of the third operational amplifier circuit 54 is respectively connected to the first end of the resistor R12 and the first end of the resistor R13, the second end of the resistor R12 is connected to the power supply U2 via the capacitor C12, the second end of the resistor R13 is grounded, the acceleration sensor 44 is connected between the left end of the capacitor C12 and the second end of the resistor R13, and the positive input end and the output end of the third operational amplifier circuit 54 are both connected to the ADC ADS7606.

[0088] In this embodiment, the acceleration sensor 44 (vibration signal) adopts an IEPE (integrated electronic piezoelectric sensor) acquisition circuit. The sampling circuit module is designed with a 0.4mA constant current source and an excitation voltage of 24V to provide a working power supply for the sensor. The IEPE sensor output is biased to 18V to 24V, and the peak-to-peak amplitude is 10V, which is a sine wave signal. The DC component of the sensor signal is removed by capacitor C12, and resistors R12 and R13 divide the signal. After the gain and low-pass filtering of the third operational amplifier circuit 54, the processed signal is output to the ADC chip for processing.

[0089] The present invention adopts high sampling rate sampling, and according to the sampling circuit module connected to the acceleration sensor 44, its channel calculation formula is as follows:

[0090] The acceleration signal sampling rate is 16 bits, and the calculation formula is as follows:

[0091]

[0092] G--------actual acceleration signal;

[0093] k---------Sensor proportional coefficient;

[0094] code g ----The sampling device reads data;

[0095] GAIN---Circuit gain.

[0096] like Figure 5As shown, the sampling circuit module corresponding to the temperature sensor 43 includes a fourth operational amplifier circuit 53, the positive input end of the fourth operational amplifier circuit 53 is connected to the first end of the resistor R14, the second end of the resistor R14 is connected to the power supply U3, the positive input end and the output end of the fourth operational amplifier circuit 53 are both connected to the ADC ADCS7476, the reverse input end of the fourth operational amplifier circuit 53 is connected to the first end of the resistor R15, the second end of the resistor R15 is connected to the first end of the temperature sensor 43, the second end of the temperature sensor 43 is grounded, and a resistor R18 is connected between the second end of the resistor R14 and the second end of the resistor R15.

[0097] In this embodiment, the sampling circuit module connected to the temperature sensor 43 (3-wire PT100, with 1 red line and 2 white lines, the red line represents the first end, and the white line represents the second end) adopts a voltage-controlled constant current source power supply circuit, and the output current is 2.5mA. The temperature sensor 43 is affected by the device under test, and the resistance value changes regularly. The constant current source power supply circuit provides a constant current to the sensor, and the temperature sensor has a resistance characteristic and outputs a voltage signal, which changes linearly with the resistance value of the sensor. The temperature signal is processed by gain and low-pass filtering, and a stable temperature signal is transmitted to the ADC chip.

[0098] The present invention adopts high sampling rate sampling, and according to the sampling circuit module connected to the temperature sensor 43, its channel calculation formula is as follows:

[0099] The temperature signal sampling rate is 12 bits, and the calculation formula is as follows:

[0100]

[0101] T-------------actual acceleration signal;

[0102] a, b---------coefficients;

[0103] code t ---------The sampling device reads data;

[0104] GAIN-------Circuit gain.

[0105] like Figure 6As shown, the present invention adopts high-precision synchronous sampling, and the synchronous sampling algorithm is implemented in the FPGA chip 21. Through the program, a synchronous signal is generated, and all sampling signals are collected at the rising edge of the synchronous signal. The FPGA chip 21 is responsible for controlling real-time synchronous acquisition and storing the collected data in the FIFO. Through the high-speed parallel bus, in order to ensure synchronization, the FPGA chip 21 sends the current, voltage, temperature, speed, acceleration and other data at the same time to the ARM chip 22 each time. The ARM chip 22 receives the data and decomposes the data according to the specified data stream. Different data are stored in corresponding data sets respectively. For example, current data sets, voltage data sets, etc., and each data set is passed to the edge computing module 3 through communication protocols such as Ethernet, CAN, and RS485. After receiving the data set, the edge computing module 3 performs time domain and frequency domain conversion analysis on the data, and labels the data. The label of each data contains temperature, humidity, time, location, and speed; the analyzed data is compared and analyzed to realize the fault judgment and health prediction of the wind turbine generator set.

[0106] On the other hand, an embodiment of the present invention further provides a device for synchronously collecting multi-state data of a wind turbine generator set, comprising a box, in which the above-mentioned synchronously collecting multi-state data of a wind turbine generator set is arranged.

[0107] It should be noted that when the system is integrated in the box, it can be flexibly arranged according to the specific structure.

[0108] In this embodiment, the box has a size of 630 mm × 400 mm × 280 mm, adopts a frame welding structure, and has a compact device layout design. The wiring design refers to the wiring rules of GB / T34571 rail transit locomotives and vehicles.

[0109] The device of the present invention uses real-time synchronous sampling data, and through the edge computing module 1, uses numerical calculation and effective value fundamental wave analysis on the voltage and current signals to judge the three-phase imbalance and fault of the generator rotor; by extracting and analyzing the characteristic values ​​of the acceleration signal (vibration signal), the bearing fault warning and status diagnosis can be performed; combined with the generator temperature information, environmental labels can be added to the data to enhance the system's self-learning ability and improve the diagnosis speed and accuracy.

[0110] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0111] It should be understood that the present invention is not limited to what has been described above and that various modifications and changes may be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A wind turbine generator multi-state data synchronous acquisition system, characterized in that: It comprises a power conversion module (1), a control module (2), an edge computing module (3), a data acquisition module (4) and a signal processing module (5); The data acquisition module (4) is connected to the signal processing module (5) and is used to transmit the collected wind turbine generator set data to the signal processing module (5) for processing; The control module (2) is connected to the signal processing module (5) and is used to collect wind turbine generator set data processed by the signal processing module (5), and decompose and store the data; The control module (2) is connected to the edge computing module (3) and is used to send the decomposed and stored data to the edge computing module (3); The edge computing module (3) is used to perform fault judgment and health prediction of the wind turbine generator set and return the results to the control module (2); the control module (2) sends the received fault judgment and health prediction results to an external terminal connected to the control module (2); The control module (2), the edge computing module (3) and the data acquisition module (4) are all connected to the power conversion module (1).

2. The wind turbine generator multi-state data synchronous acquisition system according to claim 1, characterized in that: The data acquisition module (4) comprises a voltage sensor (41), a current sensor (42), a temperature sensor (43), an acceleration sensor (44) and a rotation speed sensor (45) for monitoring the operating status of the wind turbine generator set; The voltage sensor (41), the current sensor (42), the temperature sensor (43), the acceleration sensor (44) and the rotation speed sensor (45) are all connected to the signal processing module (5) and the power conversion module (1).

3. The wind turbine generator multi-state data synchronous acquisition system according to claim 2, characterized in that: The signal processing module (5) comprises sampling circuit modules respectively connected to the voltage sensor (41), the current sensor (42), the temperature sensor (43), the acceleration sensor (44) and the rotation speed sensor (45), each sampling circuit module is connected to an analog-to-digital converter, and each analog-to-digital converter is connected to the control module (2).

4. The wind turbine generator multi-state data synchronous acquisition system according to claim 3, characterized in that: The control module (2) comprises an FPGA chip (21) and an ARM chip (22) connected to the FPGA chip (21); each of the analog-to-digital converters is connected to the FPGA chip (21); the FPGA chip (21) is connected to the power conversion module (1); and the ARM chip (22) is respectively connected to the edge computing module (3) and the power conversion module (1).

5. The wind turbine generator multi-state data synchronous acquisition system according to claim 1, characterized in that: The power conversion module (1) comprises an isolated power supply U1 and a first circuit connected to an input end of the isolated power supply U1, wherein the first circuit comprises a common-mode filter inductor T1, wherein a pin P1 of a first winding of the common-mode filter inductor T1 is connected to a first pin of the isolated power supply U1, wherein a pin P2 of a first winding of the common-mode filter inductor T1 is connected to a cathode of a diode D1, wherein an anode of the diode D1 is connected to a fuse F1, wherein a node A between the fuse F1 and the diode D1 is grounded via a capacitor C3, wherein a varistor R1 is connected in parallel at both ends of the capacitor C3, wherein the A point is at the same potential as the diode D1, wherein a pin P3 of a second winding of the common-mode filter inductor T1 is connected to a second pin of the isolated power supply U1, wherein a pin P4 of a second winding of the common-mode filter inductor T1 is grounded via a capacitor C2, wherein both ends of the capacitor C2 are connected to a ground. A varistor R2 is connected in parallel, a TVS tube D4, a TVS tube D3 and a support capacitor C4 are connected in parallel in sequence between the first pin and the second pin of the isolated power supply U1 and in the direction from the isolated power supply U1 to the common-mode filter inductor T1, a first end of the support capacitor C4 is connected to the pin P1 of the first winding of the common-mode filter inductor T1, and a second end is connected to the pin P3 of the second winding of the common-mode filter inductor T1, a TVS tube D2, a varistor R5, a varistor R4, a varistor R3 and a capacitor C1 are connected in parallel in sequence between the pin P2 of the first winding of the common-mode filter inductor T1 and the pin P4 of the second winding of the common-mode filter inductor T1, the diode D1 is located between the node B and the node C, a first end of the capacitor C1 is connected between the fuse F1 and the node A, and a second end is grounded via the capacitor C2; A support capacitor C7, a capacitor C8 and a capacitor C9 are sequentially connected in parallel between the third pin and the fifth pin of the isolated power supply U1; A capacitor C5 is connected between the second pin and the fifth pin of the isolated power supply U1 , and a capacitor C6 is connected between the first pin and the third pin of the isolated power supply U1 .

6. The wind turbine generator multi-state data synchronous acquisition system according to claim 1, characterized in that: The sampling circuit modules respectively connected to the voltage sensor (41), the current sensor (42) and the rotation speed sensor (45) are all the same; Wherein, the sampling circuit module connected to the voltage sensor (41) comprises a resistor R6, a first operational amplifier circuit (51) and a low-pass filter circuit (52); the first operational amplifier circuit (51) and the low-pass filter circuit (52) are connected via a resistor R7; the upper end of the resistor R6 is respectively connected to the first end of the resistor R8 and the positive input end of the first operational amplifier circuit (51); the lower end of the resistor R6 is grounded; the second end of the resistor R8 is connected to the voltage sensor (41); the reverse input end and the output end of the first operational amplifier circuit (51) are both connected to the first end of the resistor R7; and the second end of the resistor R7 is connected to the low-pass filter circuit (52); The low-pass filter circuit (52) comprises a second operational amplifier circuit (521), a capacitor C10, a resistor R9, a resistor R10, a resistor R11, and a capacitor C11; the upper end of the capacitor C10 is respectively connected to the first end of the resistor R9 and the positive input end of the second operational amplifier circuit (521), the lower end of the capacitor C10 is grounded, the second end of the resistor R9 is connected to the second end of the resistor R7, the reverse input end of the second operational amplifier circuit (521) is respectively connected to the first end of the resistor R10 and the first end of the resistor R11, the second end of the resistor R10 is connected to the lower end of the capacitor C10, the second end of the resistor R11 is connected to the output end of the second operational amplifier circuit (521), the first end of the capacitor C11 is connected to the node D, and the second end of the capacitor C11 is connected to the output end of the second operational amplifier circuit (521); The output end of the second operational amplifier circuit (521) is connected to the corresponding analog-to-digital converter.

7. The wind turbine generator multi-state data synchronous acquisition system according to claim 1, characterized in that: A sampling circuit module connected to the acceleration sensor (44) comprises a third operational amplifier circuit (54), wherein the reverse input end of the third operational amplifier circuit (54) is respectively connected to the first end of a resistor R12 and the first end of a resistor R13, the second end of the resistor R12 is connected to a power source U2 via a capacitor C12, the second end of the resistor R13 is grounded, the acceleration sensor (44) is connected between the left end of the capacitor C12 and the second end of the resistor R13, and the positive input end and the output end of the third operational amplifier circuit (54) are both connected to the corresponding analog-to-digital converter.

8. The wind turbine generator multi-state data synchronous acquisition system according to claim 1, characterized in that: The sampling circuit module connected to the temperature sensor (43) comprises a fourth operational amplifier circuit (53), the positive input end of the fourth operational amplifier circuit (53) is connected to the first end of a resistor R14, the second end of the resistor R14 is connected to a power supply U3, the positive input end and the output end of the fourth operational amplifier circuit (53) are both connected to the corresponding analog-to-digital converter, the negative input end of the fourth operational amplifier circuit (53) is connected to the first end of a resistor R15, the second end of the resistor R15 is connected to the first end of the temperature sensor (43), the second end of the temperature sensor (43) is grounded, and a resistor R18 is connected between the second end of the resistor R14 and the second end of the resistor R15.

9. A wind turbine generator multi-state data synchronous acquisition device, characterized in that: It comprises a box body, in which the wind turbine generator set multi-state data synchronous acquisition system according to any one of claims 1 to 8 is arranged.

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