Analog quantity acquisition and output control equipment of wind power generation system

Abstract

The utility model provides an analog quantity acquisition and output control device of a wind power generation system, which comprises an analog quantity acquisition unit and an analog quantity output unit which are respectively connected with the wind power generation system and a main control device of the wind power generation system. The analog quantity acquisition unit acquires a first analog quantity signal of the wind power generation system, converts the first analog quantity signal into a first digital signal and transmits the first digital signal to a control system of the main control equipment; and the control system of the main control equipment processes the first digital signal into a second digital signal, converts the second digital signal into a second analog quantity signal through an analog quantity output unit, and transmits the second analog quantity signal to the wind power generation system. The analog quantity signal control system is applied to a wind power generation control system, such as a generator system, a variable pitch system, a yaw system and the like, input and output of analog quantity are realized, and monitoring and control of field equipment can be realized through the analog quantity signal control system, so that the problems of single analog quantity signal acquisition realized by the existing equipment and poor precision are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation, in particular to a control device for analog quantity collection and output of a wind power generation system. Background Art

[0002] Fan analog quantity refers to the parameters used to measure and reflect the status of the fan in the fan control system. There are usually only a few of these parameters, such as fan speed, fan current, fan voltage, etc., through which the operation of the fan can be understood in real time. Fan analog quantity is used to monitor the operating status of the fan, detect faults in time, and notify the operation and maintenance personnel to perform maintenance. In addition, maintenance prediction can be made based on the fan analog quantity to prevent the occurrence of faults. When it is necessary to adjust the speed, angle and other parameters of the fan, the fan analog quantity is also indispensable. Only through the data of the fan analog quantity can the fan be effectively adjusted.

[0003] After a period of wind turbine technology introduction and industrialized production in my country, more and more companies have reached a consensus on "accelerating the process of digestion and absorption and enhancing independent research and development capabilities on the basis of technology introduction". They have carried out domestic research and development on the basis of introduction and carried out adaptive development based on the characteristics of my country's wind energy resources.

[0004] The National Development and Reform Commission and the National Energy Administration issued a notice on the "Energy Revolution Technology Innovation Action Plan (2016-2030)", requiring a focus on the "bottleneck" problem of energy equipment manufacturing and accelerating the development of control systems. In order to ensure that the "nerve center" of wind power generation - wind power control equipment can more efficiently control and monitor the reliable and safe operation of wind turbines, domestic functional equipment has emerged. Analog input and output functions are widely used in wind power generation systems, but the signals collected by existing equipment are relatively simple and lack accuracy. Therefore, control equipment for analog input and output of wind power generation systems is very necessary.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0006] In view of the shortcomings of the prior art mentioned above, the utility model provides a control device for analog quantity acquisition and output of a wind power generation system. By being applied to a wind power generation control system, such as a generator system, a pitch control system, a yaw system, etc., analog quantity input and output can be realized. The analog quantity signal control system can be used to monitor and control the on-site equipment, so as to solve the problem that the existing equipment realizes the acquisition of analog quantity signals in a relatively single manner and lacks precision.

[0007] The utility model provides a control device for analog quantity collection and output of a wind power generation system, comprising an analog quantity collection unit and an analog quantity output unit, wherein the analog quantity collection unit is respectively connected to the wind power generation system and a main control device of the wind power generation system, the analog quantity collection unit collects a first analog quantity signal of the wind power generation system, converts the first analog quantity signal into a first digital signal and then transmits it to the control system of the main control device; the analog quantity output unit is respectively connected to the wind power generation system and the main control device, the analog quantity output unit converts a second digital signal of the control system of the main control device into a second analog quantity signal and then transmits it to the wind power generation system; wherein the control system of the main control device processes the first digital signal into a second digital signal.

[0008] In one embodiment of the present invention, the control device is arranged in a subsystem of the wind power generation system and is connected to the subsystem to collect the first analog signal and output the second analog signal.

[0009] In an embodiment of the present invention, the subsystems of the wind power generation system include a generator subsystem, a pitch subsystem, and a yaw subsystem.

[0010] In an embodiment of the present invention, the first analog signal includes a voltage signal, a current signal and a sensor signal, and the second analog signal includes a voltage signal and a current signal.

[0011] In one embodiment of the present invention, the wind power generation system and the control device are connected via multiple signal channels, and the multiple signal channels transmit voltage signals, current signals, and sensor signals respectively.

[0012] In one embodiment of the utility model, the multi-channel signal channel adopts 16 signal channels, including an analog voltage acquisition and output unit signal channel for transmitting voltage signals, an analog current acquisition and output unit signal channel for transmitting current signals, and a sensor acquisition unit signal channel for transmitting sensor signals.

[0013] In one embodiment of the present invention, the wind power generation system and the control device are connected via a single signal channel, which transmits a voltage signal, a current signal, and a sensor signal in sequence.

[0014] In one embodiment of the present invention, the sensor signal includes a parameter value of a temperature signal, and the temperature signal is measured using a platinum thermal resistor PT100 / PT1000 sensor.

[0015] In one embodiment of the utility model, a detection unit is also included. The detection unit is connected to the analog quantity acquisition unit and the analog quantity output unit, and detects the connection status between the control device and the wind power generation system through the signal channel. The connection status includes disconnection, short line and voltage value of the signal channel.

[0016] Beneficial effects of the utility model: The utility model provides a control device for analog quantity acquisition and output of a wind power generation system, which converts the collected analog quantity signal into a digital signal through an analog quantity acquisition unit, and transmits the signal to the control system of the main control device in the wind power generation system through Ethernet. The analog quantity output unit converts the digital signal in the control system of the main control device into an analog quantity signal and transmits it to the actuator of the wind power generation system. The detection unit can detect channel disconnection, short line and channel voltage, so as to realize the monitoring and control of the on-site equipment of the wind power generation system.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a schematic diagram of the connection circuit between the wind power generation system of the utility model and the control device for analog quantity collection and output. DETAILED DESCRIPTION

[0020] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementations, rather than to limit the scope of protection of the present invention.

[0021] See also Figure 1 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model.

[0022] See also Figure 1 The utility model provides a control device for analog quantity acquisition and output of a wind power generation system, including an analog quantity acquisition unit and an analog quantity output unit. The analog quantity acquisition unit is respectively connected to the wind power generation system and a main control device of the wind power generation system. The analog quantity acquisition unit acquires a first analog quantity signal of the wind power generation system, converts the first analog quantity signal into a first digital signal, and then transmits it to the control system of the main control device; the analog quantity output unit is respectively connected to the wind power generation system and the main control device, the analog quantity output unit converts a second digital signal of the control system into a second analog quantity signal, and then transmits it to the wind power generation system; wherein the control system of the main control device processes the first digital signal into a second digital signal.

[0023] Furthermore, the subsystem of the wind power generation system includes a generator subsystem, a pitch subsystem and a yaw subsystem. The control device is arranged in the subsystem of the wind power generation system and connected with the subsystem to collect the first analog signal and output the second analog signal.

[0024] Specifically, the analog signal (i.e., the first analog signal) of the wind power generation system during operation is collected by the communication connected control device (the main chip of the analog acquisition and output module in the control device is the Field Programmable Gate Array FPGA chip, and specifically, the analog acquisition unit uses the Analog-to-Digital Converter ADC chip, and the analog output unit uses the Digital to Analog Converter DAC chip), and the analog acquisition unit converts the analog signal into a digital signal, and transmits it to the controller (MPC1200CG) of the main control device of the wind power generation system in a manner such as Ethernet. By analyzing the analog signal of the wind power generation system, the current operating state is determined, and a digital signal is output according to the program logic preset in the controller of the main control device (i.e., the first digital signal is processed into a second digital signal), and then converted into an analog signal that can be read by the wind power generation system through the analog output unit (i.e., the second analog signal converted from the second digital signal), thereby controlling the operating parameters of the wind power generation system.

[0025] More specifically, the control device in the embodiment of the utility model is applied to the wind power generation control system, such as the generator system, the pitch system, the yaw system, etc., which are respectively used to adjust the operating power of the generator, adjust the pitch angle, accurately yaw the wind of the wind turbine generator set, and monitor the temperature of the system operation. For example, during the operation of the yaw system, the yaw controller collects the analog signal of the angle parameter through the wind direction sensor and transmits it to the control device at the corresponding position through the analog acquisition unit, and compares it with the set value of the preset program in the control device, and then outputs the instruction of the analog signal to adjust the corresponding action of the pitch system, so that the wind turbine of the wind power generation system automatically faces the wind in the running state, performs 90° side wind protection in strong winds, and performs manual yaw setting in manual mode. By collecting the feedback data of different sensors in the wind power generation system, through the operation of the control device, the analog signal of the control instruction is output to the corresponding actuator such as the pitch mechanism in the pitch system to complete the real-time wind direction of the wind turbine.

[0026] In this way, by realizing the acquisition and output of analog signals, the control system of the main control device can monitor and control the on-site equipment and effectively adjust the wind power generation system to put it in a better working condition.

[0027] In one embodiment, the first analog signal includes a voltage signal, a current signal and a sensor signal, and the second analog signal includes a voltage signal and a current signal.

[0028] Furthermore, the sensor signal includes a parameter value of a temperature signal, and the temperature signal is measured using a platinum thermal resistor PT100 / PT1000 sensor.

[0029] Specifically, in the wind power generation system, the parameters to be monitored mainly include electrical signal parameters and environmental parameters, which are directly transmitted to the connected control equipment for parameter analysis and processing. For example, real-time monitoring of temperature parameter changes of corresponding equipment terminals between multiple measured channels can be achieved by directly connecting the resistance sensor PT100 / PT1000.

[0030] In one embodiment, the wind power generation system and the control device are connected by multiple signal channels, and the multiple signal channels transmit voltage signals, current signals, and sensor signals respectively. Further, the wind power generation system and the control device are connected by a single signal channel, and the single signal channel transmits voltage signals, current signals, and sensor signals in sequence.

[0031] Furthermore, the multi-channel signal channel adopts 16 signal channels, including an analog voltage acquisition and output unit signal channel for transmitting voltage signals, an analog current acquisition and output unit signal channel for transmitting current signals, and a sensor acquisition unit signal channel for transmitting sensor signals.

[0032] Specifically, for the solution of multiple signal channels, the control device for wind power generation analog quantity acquisition and output includes a total of 16 signal channels. These signal channels are mainly used for analog voltage (±10V, ±1V) acquisition and output unit, analog current (0-20mA, 4-20mA) acquisition and output unit, PT100 / PT1000 acquisition unit and power supply detection unit functions.

[0033] Similarly, the voltage, current, and PT100 / PT1000 modes can be combined through hardware principle design to achieve the input and output of multiple analog quantities in one channel. The mode selection can be realized according to the software configuration. For example, a single signal channel is used, and its analog output 0-10V voltage signal can be used to control the variable pitch output signal in the variable pitch system.

[0034] In one embodiment, a detection unit is further included, the detection unit is connected to the analog quantity acquisition unit and the analog quantity output unit, and detects the connection status between the control device and the wind power generation system through the signal channel, the connection status includes disconnection, short circuit and voltage value of the signal channel. In this way, the stability of the signal channel is judged to ensure the connection stability between the wind power generation system and the control device.

[0035] For more details, please see the attached Figure 1 As shown, in the wind power generation system of the present embodiment, parameter signals generated by the generator system, pitch system and yaw system are collected through analog quantity acquisition units for analog voltage parameter acquisition, analog current parameter acquisition and PT100 / PT1000 sensor parameter acquisition, and then transmitted to the control device to process these parameters into parameters such as analog voltage output and analog current output received by the analog quantity output unit, and then fed back to the wind power generation system to adjust the operating parameters of the wind power generation system and adapt the working conditions.

[0036] In summary, the utility model provides a control device for analog quantity acquisition and output of a wind power generation system, which converts the collected analog quantity signal into a digital signal through an analog quantity acquisition unit, and transmits the signal to the control system of the main control device in the wind power generation system through Ethernet. The analog quantity output unit converts the digital signal in the control system of the main control device into an analog quantity signal and transmits it to the actuator. The detection unit can detect channel disconnection, short line and channel voltage, so as to realize the monitoring and control of the on-site equipment of the wind power generation system.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A control device for analog quantity acquisition and output of a wind power generation system, characterized in that: include: An analog quantity acquisition unit, wherein the analog quantity acquisition unit is connected to the wind power generation system and a main control device of the wind power generation system respectively, and the analog quantity acquisition unit acquires a first analog quantity signal of the wind power generation system, converts the first analog quantity signal into a first digital signal, and then transmits the first analog quantity signal to the control system of the main control device; an analog output unit, wherein the analog output unit is connected to the wind power generation system and the main control device respectively, and the analog output unit converts a second digital signal of the control system of the main control device into a second analog signal, and then transmits the second analog signal to the wind power generation system; The control system of the main control device processes the first digital signal into the second digital signal.

2. The control device according to claim 1, characterized in that The control device is arranged in a subsystem of the wind power generation system and connected to the subsystem to collect the first analog signal and output the second analog signal.

3. The control device according to claim 2, characterized in that The subsystems of the wind power generation system include a generator subsystem, a pitch subsystem and a yaw subsystem.

4. The control device according to claim 2, characterized in that The first analog signal includes a voltage signal, a current signal and a sensor signal, and the second analog signal includes a voltage signal and a current signal.

5. The control device according to claim 2, characterized in that The wind power generation system and the control device are connected by multiple signal channels, and the multiple signal channels transmit voltage signals, current signals and sensor signals respectively.

6. The control device according to claim 5, characterized in that The multiple signal channels use 16 signal channels, including an analog voltage acquisition and output unit signal channel for transmitting voltage signals, an analog current acquisition and output unit signal channel for transmitting current signals, and a sensor acquisition unit signal channel for transmitting sensor signals.

7. The control device according to claim 2, characterized in that The wind power generation system and the control device are connected by a single signal channel, and the single signal channel transmits a voltage signal, a current signal and a sensor signal in sequence.

8. The control device according to claim 4, characterized in that The sensor signal includes a parameter value of a temperature signal, and the temperature signal is measured using a platinum thermal resistor PT100 / PT1000 sensor.

9. The control device according to any one of claims 5 or 7, characterized in that: It also includes a detection unit, which connects the analog quantity acquisition unit and the analog quantity output unit, and detects the connection status between the control device and the wind power generation system through the signal channel, and the connection status includes disconnection, short line and voltage value of the signal channel.

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