A Fault Data System and Device for Collecting Vibration of Wind Turbines

Abstract

The present invention discloses a fault data system for collecting vibration of a wind turbine, which includes a main collection module and a main collection protection module; the main collection module includes an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module one, a storage module and a communication module, the acceleration sensor, the vibration signal conditioning module, the ADC module and the microprocessor module one are connected in sequence, the storage module and the communication module are respectively connected to the microprocessor module one; the Rogowski coil sensor, the lightning current signal conditioning module, the ADC module and the microprocessor module two are connected in sequence, and the horizontal sensor is connected to the microprocessor module two. The present invention protects the safe operation of the module for collecting vibration information of the equipment in the nacelle of the wind turbine, provides a safe and stable operating environment for the module for collecting vibration information, and at the same time reduces the maintenance cost and further ensures the safe operation of the wind turbine.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine operating status monitoring, and in particular relates to a fault data system for collecting vibration of a wind turbine. Background Art

[0002] Wind turbines are often located in open, windward and relatively remote areas, so the geographical and natural environment they are in is relatively harsh. In addition, my country's wind power has developed rapidly in recent years, the single-unit capacity of wind turbines has been increasing, and the structure has become more complex. As a result, various types of failures in various components in the wind turbine cabin, such as main shaft bearings, gearboxes, generators, etc., are increasing.

[0003] In order to ensure the long-term safe and stable operation of wind turbines, it is necessary to collect the vibration information of wind turbines in real time, and reflect the fault type and whether the operating status of each device is normal through the mechanical quantity of the vibration information of the equipment in the cabin, so as to provide effective and accurate vibration data for subsequent fault diagnosis and wind turbine status monitoring, thereby reducing the troubleshooting time of faults in the cabin, effectively preventing more serious damage caused by further development of faults, and reducing maintenance costs. Summary of the invention

[0004] The purpose of the present invention is to provide a fault data system for collecting vibration of wind turbines, which solves the problem in the prior art that the vibration information collection module during operation is damaged due to excessive lightning current, or the collected vibration information is biased due to huge shaking, thereby causing errors or even mistakes in the subsequent fault diagnosis and operating status prediction of equipment in the wind turbine cabin.

[0005] The technical solution adopted by the present invention is:

[0006] A fault data collection system for wind turbine vibration comprises a main collection module and a main collection protection module; the main collection module comprises an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module 1, a storage module and a communication module; the acceleration sensor, the vibration signal conditioning module, the ADC module and the microprocessor module 1 are connected in sequence, and the storage module and the communication module are respectively connected to the microprocessor module 1; the main collection protection module comprises a Rogowski coil sensor, a lightning current signal conditioning module, an ADC module, a level sensor and a microprocessor module 2; the Rogowski coil sensor, the lightning current signal conditioning module, the ADC module and the microprocessor module 2 are connected in sequence, and the level sensor is connected to the microprocessor module 2.

[0007] Convert the mechanical quantity of the vibration of the equipment in the nacelle of the wind turbine into an electrical signal through its vibration sensor. The vibration signal conditioning module preprocesses the electrical signal of the collected vibration information, samples the vibration information using the ADC module and obtains the digital signal of the vibration information. At the same time, use the microprocessor module 1 for operation and processing, and upload it to the background analysis center through the communication module. The background analysis center performs fault detection and gives maintenance suggestions.

[0008] The main acquisition and protection module collects the lightning current information and horizontal angle information in the nacelle of the wind turbine, and combines the two kinds of information. When the information collected by the Rogowski coil sensor in the main acquisition and protection module is not the lightning current and the horizontal angle information collected by the horizontal sensor is normal, the acceleration sensor in its main acquisition module normally collects the vibration information and the microprocessor module 1 is in the normal working mode; when the information collected by the Rogowski coil sensor in the main acquisition and protection module is the lightning current and is normal, further use the horizontal sensor to collect the horizontal angle information of the equipment in the nacelle. If the horizontal angle signal is normal, at this time the acceleration sensor normally collects and the microprocessor module 1 works normally; if the horizontal angle signal is abnormal, the acceleration sensor will not collect the vibration information but the microprocessor module 1 works normally at this time; when the lightning current information collected by the Rogowski coil sensor in the main acquisition and protection module reaches an abnormality, the acceleration sensor will no longer collect the vibration information and the microprocessor module 1 is in the power-off protection working mode.

[0009] When the information collected by the Rogowski coil sensor in the main acquisition and protection module is the lightning current and is abnormal, its microprocessor module 2 controls the microprocessor module 1 to be in the power-off protection working mode.

[0010] If the information collected by the Rogowski coil sensor in the main acquisition and protection module is the lightning current within the normal range or no lightning current information is collected, and the horizontal angle information collected by the horizontal sensor changes from abnormal in the previous stage to normal in the current stage, at this time the acceleration sensor resumes normal collection, and in this case the microprocessor module 1 maintains the normal working state;

[0011] If the information collected by the Rogowski coil sensor in the main acquisition and protection module in the previous stage is the abnormal lightning current, and the lightning current information collected in the current stage has returned to the normal index, and the horizontal angle information collected by the horizontal sensor is also normal, at this time the acceleration sensor resumes collection, and the microprocessor module 1 exits the power-off working mode and resumes the normal working state.

[0012] A device for collecting fault data of wind turbine vibration, comprising a main acquisition module and a main acquisition protection module, wherein the main acquisition module comprises an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module 1, a storage module and a communication module, and the main acquisition protection module comprises a Rogowski coil sensor, a lightning current signal conditioning module, an ADC module, a level sensor and a microprocessor module 2;

[0013] The Rogowski coil sensor is respectively arranged on the gearbox and the generator; the acceleration sensor is respectively arranged on the main shaft bearing, the gearbox, the high-speed bearing of the gearbox, the generator and the rear bearing of the generator; the horizontal sensor is respectively arranged on the gearbox and the generator, and is closely attached to their surfaces and parallel to the axis of the measured equipment without an angle.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention protects the safe operation of the module for collecting vibration information of equipment in the cabin of the wind turbine generator set, and provides a safe and stable operating environment for the module for collecting vibration information. It can eliminate the interference and error caused by huge shaking caused by various factors on the collected vibration information, thereby improving the accuracy and reliability of subsequent fault identification, reducing the time for troubleshooting, further curbing the development and spread of faults, and at the same time reducing maintenance costs, further ensuring the safe operation of the wind turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural block diagram of the system of the present invention;

[0017] Figure 2 Working sequence diagram for collecting vibration information for the main acquisition module;

[0018] Figure 3 This is the hardware connection diagram of microprocessor module one and microprocessor module two. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with specific examples, but the implementation methods of the present invention include but are not limited to the scope represented by the following examples.

[0020] like Figure 1As shown, it is a structural block diagram of a fault data collection system for wind turbine vibration, and the device includes two parts: a main collection module and a main collection protection module. The main collection module is composed of an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module 1, a storage module and a communication module. The acceleration sensor, the vibration signal conditioning module, the ADC module and the microprocessor module 1 are connected in series in sequence, and the I / O ports of the storage module and the communication module are bidirectionally connected with the I / O ports of the microprocessor module 1. The main collection protection module is composed of a Rogowski coil sensor, a horizontal sensor, a lightning current signal conditioning module, an ADC module and a microprocessor module 2. The Rogowski coil sensor, the lightning current signal conditioning module, the ADC module and the microprocessor module 2 are connected in series in sequence, and the output end of the horizontal sensor is directly connected to the input end of the microprocessor module 2. The control output end of the microprocessor module 2 in the main collection protection module is connected to the control port of the microprocessor module 1 in the main collection module to control the working state of the entire main collection module.

[0021] The main acquisition module uses an acceleration sensor to collect vibration information in the cabin and outputs a voltage signal proportional to the vibration physical quantity. The vibration signal conditioning module performs a series of preprocessing on the vibration voltage signal. The ADC module samples the conditioned vibration signal and obtains a vibration digital signal. Then the microprocessor module calculates and analyzes the vibration digital signal and transmits it to the background analysis center through the communication module.

[0022] The main acquisition protection module uses the Rogowski coil sensor to collect the lightning current information in the wind turbine cabin, and processes the lightning current signal to the voltage range that the ADC module can collect through the conditioning function of the lightning current signal conditioning module to prevent damage to the ADC module, and transmits the sampled lightning current digital signal to the microprocessor module 2 for calculation and analysis to obtain the characteristic data index of the lightning current. At the same time, the horizontal sensor collects the horizontal angle information in real time and sends it to the microprocessor module 2 for processing. During the operation of the main acquisition module, if the lightning current information collected by the main acquisition protection module is abnormal, the microprocessor module 2 issues a corresponding power-off control command, so that the microprocessor module 1 is in the power-off protection working mode. At this time, the acceleration sensor also stops collecting vibration information, thereby protecting the safe operation of the main acquisition module. If an abnormal horizontal angle signal occurs, the acceleration sensor will no longer collect vibration information to prevent the collected vibration information from being inaccurate due to huge shaking, causing deviations when the background analysis center predicts the fault of the wind turbine. Through the above measures, the vibration information of the equipment in the cabin of the wind turbine can be collected efficiently and accurately.

[0023] like Figure 2As shown in the figure, it is the working timing diagram of the main acquisition module for acquiring vibration information. The Rogowski coil sensor and the horizontal sensor in its main acquisition protection module are used to acquire the lightning current information and the horizontal angle information of the equipment in the nacelle of the wind turbine.

[0024] (1) As Figure 2 In case A, when the Rogowski coil sensor does not acquire lightning current information and the horizontal angle information acquired by the horizontal sensor is within the normal value range, at this time, the acceleration sensor normally acquires the vibration information of the equipment in the nacelle and the microprocessor module 1 is in a normal working state;

[0025] (2) As Figure 2 In case B, when the lightning current information acquired by the Rogowski coil sensor is within the normal value range and the horizontal angle information acquired by the horizontal sensor is normal, at this time, the acceleration sensor still normally acquires the vibration information of the equipment in the nacelle and the microprocessor module 1 is in a normal working state;

[0026] (3) As Figure 2 In case C, if the lightning current information acquired by the Rogowski coil sensor is within the normal value range or no lightning current information is acquired, but at this time the horizontal angle signal acquired by the horizontal sensor is abnormal, at this time, the acceleration sensor does not acquire vibration information, while the microprocessor module 1 still works normally;

[0027] (4) As Figure 2 In case D, if the information acquired by the Rogowski coil sensor still belongs to the normal value, and at this time the horizontal angle information acquired by the horizontal sensor returns from the abnormal situation in the previous stage to the normal value range, the acceleration sensor will resume normal acquisition of vibration information from the stopped acquisition state;

[0028] (5) As Figure 2 In case E, when the lightning current information acquired by the Rogowski coil sensor is abnormal, the microprocessor module 1 is in a power-down working state and the acceleration sensor does not acquire vibration information;

[0029] (6) As Figure 2 In case F, if the lightning current information acquired by the Rogowski coil sensor returns to the normal range and the horizontal angle information belongs to the normal value, at this time, the microprocessor module 1 exits the power-down mode and resumes to the normal working state, and the acceleration sensor will also resume normal acquisition of vibration information.

[0030] As Figure 3 shown, it is the hardware connection diagram of the microprocessor module 1 and the microprocessor module 2. The control output end of the microprocessor module 2 is connected to the control port of the microprocessor module 1. Taking the data index of the lightning current information as the standard, when the acquired lightning current data index is higher than the standard obtained from past experience, it indicates that the current lightning current may cause damage to the main acquisition module. As Figure 2As shown in Case E, the microprocessor module 2 generates a corresponding power-down control signal, and then transmits the power-down control signal to the microprocessor module 1 through the microprocessor module 2. When the microprocessor module 1 detects and receives the power-down control signal, it enters the power-down working mode. During the period when the microprocessor module 1 is in the power-down working mode, the crystal oscillator stops oscillating, and all components such as the CPU, timer, and serial port stop working, and the microprocessor module 1 stops the entire operation. When it is detected that the voltage supplying power to the microprocessor module 1 drops to the rated working voltage, some important information is stored in the on-chip RAM memory, and the backup power supply supplies power to the RAM to prevent the loss of important information. When the lightning current data collected by the main acquisition and protection module returns to the normal value range, at this time, the voltage supplied to the microprocessor module 1 also returns to the normal value. A reset positive pulse signal is provided by the hardware reset circuit, and the microprocessor module 1 exits the power-down working state. At this time, the backup power supply still supplies power to the RAM. To ensure the startup of the crystal oscillator, the microprocessor module 1 completes the reset. This can prevent irreversible damage to the main acquisition module caused by excessive lightning current, prevent the loss of information during the operation of the main acquisition module, and ensure the normal operation of the main acquisition module.

Claims

1. A fault data system for collecting the vibration of a wind turbine, characterized in that: It includes a main acquisition module, a main acquisition protection module and a background analysis center; the main acquisition module includes an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module 1, a storage module and a communication module. The acceleration sensor, the vibration signal conditioning module, the ADC module and the microprocessor module 1 are connected in sequence. The storage module and the communication module are respectively connected to the microprocessor module 1; the communication module is connected to the background analysis center; the main acquisition protection module includes a Rogowski coil sensor, a lightning current signal conditioning module, an ADC module, a horizontal sensor and a microprocessor module 2. The Rogowski coil sensor, the lightning current signal conditioning module, the ADC module and the microprocessor module 2 are connected in sequence. The horizontal sensor is connected to the microprocessor module 2; The main acquisition protection module collects the lightning current information and the horizontal angle information in the nacelle of the wind turbine and combines the two types of information. When the information collected by the Rogowski coil sensor in the main acquisition protection module is not a lightning current and the horizontal angle information collected by the horizontal sensor is normal, the acceleration sensor in the main acquisition module normally collects vibration information and the microprocessor module 1 is in the normal working mode; when the information collected by the Rogowski coil sensor in the main acquisition protection module is a lightning current and is normal, the horizontal sensor is further used to collect the horizontal angle information of the equipment in the nacelle. If the horizontal angle information is normal, at this time the acceleration sensor normally collects and the microprocessor module 1 works normally; if the horizontal angle information is abnormal, the acceleration sensor will not collect vibration information but the microprocessor module 1 works normally at this time; when the lightning current information collected by the Rogowski coil sensor in the main acquisition protection module reaches an abnormality, the acceleration sensor will no longer collect vibration information and the microprocessor module 1 is in the power-down protection working mode.

2. The fault data system for collecting the vibration of a wind turbine according to claim 1, characterized in that: The acceleration sensor converts the mechanical quantity of the vibration of the equipment in the nacelle of the wind turbine into an electrical signal. The vibration signal conditioning module preprocesses the electrical signal of the collected vibration information. The ADC module samples the vibration information to obtain the digital signal of the vibration information. At the same time, the microprocessor module 1 performs operations and processing and uploads it to the background analysis center through the communication module. The background analysis center performs fault detection and gives maintenance suggestions.

3. The fault data system for collecting the vibration of a wind turbine according to claim 2, characterized in that: When the information collected by the Rogowski coil sensor in the main acquisition protection module is a lightning current and is abnormal, the microprocessor module 2 controls the microprocessor module 1 to be in the power-down protection working mode.

4. The fault data system for collecting the vibration of a wind turbine according to claim 3, characterized in that: If the information collected by the Rogowski coil sensor in the main acquisition protection module is a lightning current within the normal range or no lightning current information is collected, and the horizontal angle information collected by the horizontal sensor changes from abnormal in the previous stage to normal in the current stage, at this time the acceleration sensor resumes normal collection and the microprocessor module 1 maintains a normal working state; If the information collected by the Rogowski coil sensor in the main acquisition protection module in the previous stage is abnormal lightning current, and the lightning current information collected in the current stage has returned to normal indicators, and the horizontal angle information collected by the horizontal sensor is also normal, at this time, the acceleration sensor resumes collection, and the microprocessor module 1 exits the power-down working mode and resumes the normal working state.

5. A fault data device for collecting the vibration of a wind turbine according to any one of claims 1-4, characterized in that: It includes a main acquisition module and a main acquisition protection module. The main acquisition module includes an acceleration sensor, a vibration signal conditioning module, an ADC module, a microprocessor module 1, a storage module, and a communication module. The main acquisition protection module includes a Rogowski coil sensor, a lightning current signal conditioning module, an ADC module, a horizontal sensor, and a microprocessor module 2; The Rogowski coil sensors are respectively arranged on the gearbox and the generator; the acceleration sensors are respectively arranged on the main shaft bearing, the gearbox, the high-speed bearing of the gearbox, the generator, and the rear bearing of the generator; the horizontal sensors are respectively arranged on the gearbox and the generator, and are closely attached to their surfaces, parallel to the axis of the measured device and without an included angle.

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