CN215219520U

CN215219520U - Digital temperature and humidity detection control system of wind power converter

Info

Publication number: CN215219520U
Application number: CN202120858559.3U
Authority: CN
Inventors: 朱峰; 罗雄飞; 苏哲侃; 刘勇; 吕远; 侯少敏
Original assignee: Guoneng Longyuan Electric Co ltd
Current assignee: Guoneng Longyuan Electric Co ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-17
Anticipated expiration: 2031-04-25

Abstract

The utility model relates to a digital temperature and humidity detection control system of a wind power converter, which comprises an analog acquisition device, a signal control panel and a converter controller which are connected in sequence, wherein the analog acquisition device is connected with the wind power converter and is used for acquiring temperature and humidity data of the wind power converter; the signal control board is used for signal extension, is provided with mutual signal connection's FPGA chip and DSP chip on it, and the FPGA chip obtains the humiture data on the analog acquisition device and writes into the internal register, and the DSP chip is used for the humiture data in the internal register of periodic reading, supplies converter controller to start or stop heating, dehumidification operation. The utility model discloses can effectively reduce the device cost of converter to reduce the unreliable problem of cable junction between the device. The full-digital sampling can also improve the temperature and humidity detection precision, so that the temperature and humidity in the converter cabinet can be controlled more accurately, and the heating efficiency and the whole machine utilization rate of the converter are improved.

Description

Digital temperature and humidity detection control system of wind power converter

Technical Field

The utility model relates to a wind-powered electricity generation converter's digital control technical field, concretely relates to digital temperature and humidity measurement control system of wind-powered electricity generation converter.

Background

With the rapid development of clean energy such as wind energy and the like, the installed capacity of wind power generation in China is always increased, and the influence on the operation of a power grid is not negligible. The wind power converter is used as a core device in the wind generating set, undertakes conversion from mechanical energy to electric energy of the wind generating set, and the reliability of the wind power converter directly affects the utilization rate of the whole machine and even threatens safe and stable operation of a power grid. Because the wind power converter has complex and changeable application environments including severe environments such as severe cold and humidity, the converter needs to perform necessary preparation work such as heating and dehumidification before starting the converter, on one hand, the problem that devices cannot reliably work due to low ambient temperature is solved, and on the other hand, the phenomenon that the insulation of a system is reduced due to too high humidity is avoided, so that an electrical short circuit fault is caused. The heating and dehumidification of the wind power converter are controlled by adding the temperature and humidity detection device, so that the operation safety of the wind power converter equipment can be guaranteed.

A commonly used temperature and humidity detection method in a wind power converter is that a mechanical temperature controller and a humidity controller (as shown in fig. 1) are adopted, a dry contact signal is given when a set temperature value or humidity value is reached, and a main controller controls heating and dehumidification of a system by judging the state of the dry contact. The method has the main defects that the specific values of the temperature and the humidity in the cabinet cannot be obtained in real time, the sampling deviation is large, and the control precision is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a digital temperature and humidity detection control system of a wind power converter, which comprises an analog acquisition device, a signal control panel and a converter controller which are connected in sequence, wherein,

the simulation acquisition device is connected with the wind power converter and used for acquiring temperature and humidity data of the wind power converter;

the signal control board is connected with the analog acquisition device through a 50-pin flat cable and used for signal expansion, an FPGA chip and a DSP chip which are connected with each other through signals are arranged on the signal control board, the FPGA chip acquires temperature and humidity data on the analog acquisition device through an IIC single data bus and writes the temperature and humidity data into an internal register, and the DSP chip is used for periodically reading the temperature and humidity data in the internal register and supplying the converter controller to start or stop heating and dehumidifying operations.

The simulation acquisition device comprises a simulation acquisition board and a temperature and humidity sensing chip, the temperature and humidity sensing chip is welded on the simulation acquisition board, and the temperature and humidity sensing chip is selected from an AM2302 temperature and humidity sensing chip.

The DSP chip and the FPGA chip are communicated through a 16-bit data bus.

Wherein, signal control panel all is provided with a plurality of groups radiating groove in the periphery of FPGA chip and DSP chip, sets up a plurality of louvres that wear to be equipped with signal control panel in the radiating groove.

The utility model provides a digital temperature and humidity measurement control system of wind-powered electricity generation converter can effectively reduce the device cost of converter to reduce the unreliable problem of cable connection between the device. The full-digital sampling can also improve the temperature and humidity detection precision, so that the temperature and humidity in the converter cabinet can be controlled more accurately, and the heating efficiency and the whole machine utilization rate of the converter are improved. The accurate temperature and humidity detection control method ensures the long-time safe and stable operation of the converter in a harsh environment.

Drawings

FIG. 1: the schematic diagram of the mechanical temperature and humidity detection and heating control method in the prior art.

FIG. 2: the utility model discloses a digital temperature and humidity measurement control system's of wind-powered electricity generation converter whole logic architecture picture.

FIG. 3: the utility model discloses the IIC single bus communication protocol who adopts.

FIG. 4: the utility model discloses a DSP chip visits FPGA chip's memory interface picture.

FIG. 5: the utility model discloses a top view of FPGA chip DSP chip.

Detailed Description

In order to further understand the technical solution and the advantages of the present invention, the following detailed description will be made with reference to the accompanying drawings.

In order to realize the detection and the control of temperature, humidity in the converter cabinet, solve traditional mechanical type temperature and humidity controller and can't accurately acquire temperature and humidity numerical value, control accuracy is poor, the unsatisfactory problem of control effect, the utility model provides a digital temperature and humidity measurement control system of wind-powered electricity generation converter has realized accurate temperature and humidity measurement control through holistic framework design, has guaranteed the long-time safe and stable operation of converter under harsh environment.

Fig. 2 is the whole logic architecture diagram of the digitized temperature and humidity measurement control system of the wind power converter of the utility model, as shown in fig. 2, the digitized temperature and humidity measurement control system of the wind power converter of the utility model, the complete hardware circuit board includes the analog acquisition device, the signal control panel and the converter controller that connect gradually, the analog acquisition device is welded with the analog acquisition board of the AM2302 temperature and humidity sensing chip, is used for being responsible for the acquisition of front end analog quantity data, the signal control panel is connected with the analog acquisition board, is used for being responsible for the expansion of IO signals, the control core board of the signal control panel is welded with the FPGA chip and the DSP chip that are connected with each other by signals, is used for being responsible for the centralized control of the system, and the control core board can be buckled on the signal control panel by plug-in components; the analog acquisition board is connected with the signal control board by a 50-pin wire arrangement. The concrete during operation: the method comprises the steps that an AM2302 temperature and humidity sensor starts to sample temperature and humidity analog data of the wind power converter in real time, then the measured temperature and humidity data are sent to an FPGA chip through IIC bus communication, and the FPGA chip analyzes the received data and stores the received data in an internal register through an IIC single data bus; and finally, the DSP chip periodically reads the value in the internal register of the FPGA through EMIF bus communication mode, preferably through 16-bit data bus communication, so as to obtain the real-time temperature and humidity in the cabinet, and further judge whether the whole converter system needs to execute heating and dehumidifying operations. Fig. 3 and 4 are diagrams of the IIC single bus communication protocol and the memory interface of the DSP chip accessing the FPGA chip, respectively.

In the utility model, a power supply unit (not shown) outputs stable direct current voltage (15 VDC and 24VDC respectively) to supply power to the whole hardware circuit board; for example, a 24VDC power supply path is output, a signal control board X1 terminal is connected, a 15VDC power supply path is output, and a signal control board X4 terminal is connected.

The FPGA chip and the DSP chip are core components of the temperature and humidity detection control system, and are mainly used for realizing data acquisition, calculation, judgment and the like, in order to ensure the normal operation of the chip under a high-frequency working period, the utility model discloses a corresponding heat dissipation structure is arranged at the periphery of the FPGA chip and the DSP chip, so as to prolong the service life of equipment, FIG. 5 is a top view of the FPGA chip/DSP chip, as shown in FIG. 5, taking the FPGA chip as an example, in the utility model, a plurality of groups of heat dissipation grooves 30 are arranged at the periphery surrounding the FPGA chip 20 on the signal control panel 10, and a plurality of heat dissipation holes 40 penetrating the signal control panel 10 are arranged in the heat dissipation grooves 30; meanwhile, a silica gel heat conduction layer 22 is arranged around the outer edge of the chip body 21 of the FPGA chip 20, and the silica gel heat conduction layer 22 is respectively provided with four heat conduction cavities 23 along the four sides of the chip body 21; a plurality of groups of aluminum foils 24 are supported in the heat conducting cavity 23; the positions of the silica gel heat conduction layer 22 not provided with the heat conduction cavity 23 are all provided with a plurality of heat dissipation holes 25 penetrating through the silica gel heat conduction layer 22.

In the using process of the FPGA chip, heat generated by the chip body 21 is dissipated outwards through the silica gel heat conduction layer 22, and the silica gel heat conduction layer 22 provides a vibration-proof effect at the same time, so that the chip body 21 is prevented from being damaged by external force; the heat conduction cavity 23 and the heat dissipation holes 25 have uniform functions, so that the arrangement cost of the silica gel heat conduction layer 22 is saved, and the structure chip body 21 is prevented from deforming due to structural resonance under the action of external force by alternately arranging the heat conduction cavity 23 and the silica gel heat conduction layer 22; meanwhile, the heat conduction cavity 23 and the heat dissipation holes 25 can improve the heat conduction efficiency from inside to outside along the silica gel heat conduction layer 22, and increase the heat dissipation effect; finally, the heat conducting cavity 23 is arranged to accommodate the aluminum foil 24 therein to further increase the structural strength of the FPGA chip.

The utility model discloses in, interconnecting link etc. between FPGA chip and DSP chip and the simulation collection system, do not set up heat conduction chamber 23 and aluminium foil 24's position along silica gel heat-conducting layer 23 more and arrange to make silica gel heat-conducting layer 22 play protection circuit's effect simultaneously.

Corresponding heat radiation structure and efficiency of DSP chip department are unanimous with the FPGA chip, the utility model discloses do not do here and describe repeatedly more.

The utility model provides a digital temperature and humidity measurement control system of wind-powered electricity generation converter can effectively reduce the device cost of converter to reduce the unreliable problem of cable connection between the device. The full-digital sampling can also improve the temperature and humidity detection precision, so that the temperature and humidity control in the converter cabinet is more accurate, the problems that the traditional mechanical temperature and humidity controller cannot accurately acquire temperature and humidity values, the control precision is poor and the control effect is not ideal are solved, and the heating efficiency and the complete machine utilization rate of the converter are improved. The accurate temperature and humidity detection control method ensures the long-time safe and stable operation of the converter in a harsh environment, and can effectively reduce the cost of devices and save the installation space.

Although the present invention has been described with reference to the above preferred embodiments, it is not intended to limit the scope of the present invention, and various changes and modifications relative to the above embodiments may be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. The digital temperature and humidity detection control system of the wind power converter is characterized by comprising an analog acquisition device, a signal control board and a converter controller which are sequentially connected, wherein,

2. The digital temperature and humidity detection control system of the wind power converter according to claim 1, wherein the analog acquisition device comprises an analog acquisition board and a temperature and humidity sensing chip, the temperature and humidity sensing chip is welded on the analog acquisition board, and the temperature and humidity sensing chip is selected from an AM2302 temperature and humidity sensing chip.

3. The digital temperature and humidity detection control system of the wind power converter according to claim 1, wherein the DSP chip and the FPGA chip communicate through a 16-bit data bus.

4. The digital temperature and humidity detection control system of the wind power converter according to claim 1, wherein the signal control board is provided with a plurality of sets of heat dissipation grooves on the peripheries of the FPGA chip and the DSP chip, and a plurality of heat dissipation holes are formed in the heat dissipation grooves and penetrated by the signal control board.