CN103995527B - Wind-driven generator group wheel box temperature collecting device - Google Patents

Abstract

The present invention provides a temperature collection device for a gearbox of a wind power generating set, comprising: the same first temperature collection and transmission path, the second temperature collection and transmission path, and the third temperature collection and transmission path connected in parallel; where any temperature collection and transmission path When a fault occurs, the temperature acquisition transmission path is automatically disconnected, and the data is automatically processed, while other temperature acquisition transmission paths work normally.

Description

Wind turbine gearbox temperature acquisition device

technical field

The invention relates to the field of wind power generation, and more specifically, the invention relates to a temperature acquisition device for a gearbox of a wind power generating set based on parallel fault-tolerant control.

Background technique

For the acquisition of the temperature of the gearbox of the wind power generating set, the general method is commonly used, that is, a single temperature sensor is used to collect the temperature.

However, the solution in the prior art that uses a single temperature sensor to collect temperature is relatively low in reliability. If the sensor fails, the temperature of the gearbox, especially the temperature of the lubricating oil, is not accurate enough, and it is directly the subsequent lubrication. The heat exchange of the oil is affected, thereby affecting the normal operation of the gearbox, causing damage to the gearbox in the slightest, and paralyzing the entire wind turbine in severe cases.

Therefore, it is desired to provide a technical solution capable of ensuring the accuracy and reliability of the gearbox temperature collection.

Contents of the invention

The technical problem to be solved by the present invention is to provide a wind turbine gearbox temperature acquisition device based on parallel fault-tolerant control in view of the above-mentioned defects in the prior art, which can ensure the accuracy and reliability of the gearbox temperature acquisition, thereby improving gear The reliability of the normal operation of the gearbox ensures the normal operation of the gearbox, so as to ensure that the wind turbine will not cause major losses due to the failure of the gearbox.

In order to achieve the above technical purpose, according to the present invention, a wind turbine gearbox temperature collection device is provided, which includes: the same first temperature collection and transmission path, the second temperature collection and transmission path and the third temperature collection and transmission path connected in parallel path; when any temperature collection transmission path fails, the temperature collection transmission path is automatically disconnected, and the data is automatically processed, while other temperature collection transmission paths work normally.

Preferably, the first temperature collection transfer path includes a first bridge circuit, a first multi-way switch, a first amplifier and a first analog-to-digital converter connected in sequence; the second temperature collection transfer path includes a second bridge circuit, a first multi-way switch connected in sequence, The second multi-way switch, the second amplifier, and the second analog-to-digital converter; the third temperature acquisition transfer path includes a third bridge, a third multi-way switch, a third amplifier, and a third analog-to-digital converter connected in sequence.

Preferably, the wind power generating set gearbox temperature acquisition device further includes: a beacon unit, used to detect and respond to the working status of the first bridge, the second bridge, and the third bridge, and will indicate the first bridge The indication signals of the working states of the road, the second bridge, and the third bridge are respectively input to the first input ends of the first multiplexer, the second multiplexer, and the third multiplexer. The temperature collection device for the wind power generating set gearbox also includes: a host circuit; wherein the first bridge, the second bridge, and the third bridge are used to collect the temperature of the wind power generating set gearbox and represent the collected wind power generation The signal of the gearbox temperature of the unit is respectively input to the second input terminals of the first multi-way switch, the second multi-way switch, and the third multi-way switch; the first multi-way switch, the second multi-way switch, and the third multi-way switch The switches respectively pass through the first amplifier and the first analog-to-digital converter, the second amplifier and the second analog-to-digital converter, and the third amplifier and the third analog-to-digital converter according to the signals received from the respective first and second input terminals, respectively. The digital converter outputs a multi-switch output signal subjected to amplification and analog-to-digital conversion to the host circuit.

Preferably, the wind power generating set gearbox temperature acquisition device further includes: a restoration and re-entry unit connected to the host circuit, configured to restore the system to work according to the instructions of the host circuit.

Preferably, when the data received from the first temperature collection transmission path, the second temperature collection transmission path and the third temperature collection transmission path are within a predetermined deviation range, the host circuit judges that there is no fault and obtains The average value of the data received by the transmission path, the second temperature collection transmission path and the third temperature collection transmission path is used as the current temperature of the gearbox.

Therefore, the present invention provides a wind turbine gearbox temperature collection device based on parallel fault-tolerant control, which can ensure the accuracy and reliability of the gearbox temperature collection, thereby improving the reliability of the normal operation of the gearbox and ensuring the normal operation of the gearbox. Operation, so as to ensure that the wind turbine will not cause heavy losses due to the failure of the gearbox.

Description of drawings

A more complete understanding of the invention, and its accompanying advantages and features, will be more readily understood by reference to the following detailed description, taken in conjunction with the accompanying drawings, in which:

Fig. 1 schematically shows a block diagram of a wind power generator gearbox temperature acquisition device according to a preferred embodiment of the present invention.

Fig. 2 schematically shows the working flow chart of the temperature acquisition device for the gearbox of the wind power generating set according to the preferred embodiment of the present invention.

It should be noted that the accompanying drawings are used to illustrate the present invention, but not to limit the present invention. Note that drawings showing structures may not be drawn to scale. And, in the drawings, the same or similar elements are marked with the same or similar symbols.

detailed description

In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

The invention mainly adopts process channel, backup fault tolerance of hardware redundancy and system recovery and re-entry technology. Among them, using parallel fault-tolerant control technology, three sets of identical input channels are designed. The status of the three is exactly the same. For the input channels, the data collected by the three are sent to the CPU, and the CPU compares them. Most of them are correct. If the three are not the same, you can further carry out their own self-diagnosis, and adopt the data of self-diagnosis to confirm that there is no faulty channel.

Specifically, the same three temperature acquisition transfer paths (the first temperature acquisition transfer path, the second temperature acquisition transfer path and the third temperature acquisition transfer path) connected in parallel can be used; wherein when any temperature acquisition transfer path fails, The temperature collection transmission path is automatically disconnected, and the data is automatically processed, while other temperature collection transmission paths work normally.

Preferred embodiments of the present invention are specifically described below.

Fig. 1 schematically shows a block diagram of a wind power generator gearbox temperature acquisition device according to a preferred embodiment of the present invention.

As shown in Figure 1, according to the preferred embodiment of the present invention, the temperature acquisition device for the gearbox of a wind power generating set includes: the same three temperature acquisition transmission paths connected in parallel (the first temperature acquisition transmission path, the second temperature acquisition transmission path and the third temperature acquisition transmission path) temperature acquisition transfer path); wherein the first temperature acquisition transfer path includes the first bridge 11, the first multi-way switch 21, the first amplifier 31 and the first analog-to-digital converter 41 connected in sequence; the second temperature acquisition transfer path includes The second bridge circuit 12, the second multi-way switch 22, the second amplifier 32 and the second analog-to-digital converter 42 connected in sequence; the third temperature acquisition transfer path includes the third bridge circuit 13, the third multi-way switch connected in sequence 23 . The third amplifier 33 and the third analog-to-digital converter 43 .

According to the preferred embodiment of the present invention, the wind power generating set gearbox temperature acquisition device further includes: a beacon unit 20, which is used to detect and respond to the working status of the first bridge 11, the second bridge 12, and the third bridge 13, And input indicating signals representing the operating states of the first bridge 11, the second bridge 12, and the third bridge 13 to the first multiplexer 21, the second multiplexer 22, and the third multiplexer respectively 23's first input.

According to the preferred embodiment of the present invention, the wind power generating set gearbox temperature acquisition device further includes: a host circuit 30 , and a display 40 connected to the host circuit 30 , a recovery reentry unit 50 , and an input unit (such as a keyboard) 60 .

Wherein, the first bridge 11, the second bridge 12, and the third bridge 13 are used to collect the temperature of the gearbox of the wind power generating set (the temperature of the acquisition object) and express the signals of the gearbox temperature of the wind generating set collected respectively. Input to the second input terminals of the first multiplexer 21 , the second multiplexer 22 , and the third multiplexer 23 .

For example, the working states of the first bridge circuit 11, the second bridge circuit 12, and the third bridge circuit 13 respectively correspond to three light-emitting diodes. If they are in normal use, the diodes will light up for indication, and if there is a fault, the diodes will go out.

The first multi-way switch 21, the second multi-way switch 22, and the third multi-way switch 23 respectively pass through the first amplifier 31 and the first analog-to-digital conversion according to the signals received from the respective first input terminals and the second input terminals. The amplifier 41, the second amplifier 32 and the second analog-to-digital converter 42, and the third amplifier 33 and the third analog-to-digital converter 43 output to the host circuit 30 a multiplexed output signal subjected to amplification and analog-to-digital conversion. That is, the multi-way switch can realize that when a failure occurs in this way, the way can be disconnected so as to deal with the failure.

The recovery and re-entry unit 50 used as an option is used to restore the system to work according to the instructions of the host circuit 30 (for example, when the system is disturbed and the program runs away or crashes).

The display 40 can adopt 8-digit LED display, and what the first four digits show is the actual temperature value output after analyzing the data, and the last four digits are fault codes when the system fails; vice versa.

According to the preferred embodiment of the present invention, the wind power generating set gearbox temperature acquisition device also includes: a first drive 71 and a second drive 72, which are respectively the result indicator lights after comparing the actual temperature with the ideal temperature, for example, red and green light-emitting diodes can be used , if the actual temperature is higher than the ideal temperature, the red diode is on, and if the actual temperature is lower than the ideal temperature, the green diode is on. Wherein, what the keyboard 60 inputs is the ideal temperature setting of the gear box.

Fig. 2 schematically shows the working flow chart of the temperature acquisition device for the gearbox of the wind power generating set according to the preferred embodiment of the present invention.

As shown in Figure 2, when starting up, the system self-test is performed first, including the self-test of CPU, memory, and A/D process channel, and prompt information is displayed. If a fault is diagnosed, the fault code will be displayed, and if there is no fault, it will enter the temperature measurement stage. When the system is working normally, it can also carry out periodic self-test. When a fault is found, take fault-tolerant measures to ensure the normal operation of the system, and display the fault code on part of the display area (such as the first four LEDs) while displaying the temperature measurement value on some display areas (such as the last four LEDs) . If the system is disturbed and the program runs away or crashes, the system recovery and reentry unit works to make it work again. For example, if a branch has a fault, the branch will be disconnected automatically, and the data will be processed automatically, while the other two branches still work, thus achieving fault tolerance.

When the data received from the first temperature acquisition transfer path, the second temperature acquisition transfer path and the third temperature acquisition transfer path are within the predetermined deviation range, the host circuit 30 judges that there is no fault (for example, the self-test result is no fault) , and obtain the average value of the data received from the first temperature collection transmission path, the second temperature collection transmission path and the third temperature collection transmission path as the current temperature of the gearbox. The current temperature of the gearbox can be output and displayed on the first four digits of the display (or displayed in other ways). If the difference between the three is very large (not within the predetermined deviation range), you can further perform their own self-diagnosis, and adopt the data of the channel that has no faults confirmed by self-diagnosis.

For example, the above device may be powered by one or more regulated power sources (eg, the first regulated power source 1 and the second regulated power source 2 ).

The invention has the advantages of simple structure, high efficiency, lightness, cheap price and the like. Ensure accurate temperature collection of the gearbox and high reliability, thereby ensuring accurate and reliable temperature control and improving the reliability of wind turbine operation.

In addition, the present invention has at least the following advantageous features:

1. Suppress interference. If the system is disturbed and the program runs away or crashes, the system recovery and reentry unit will work to restore it to work.

2. Automatic detection of faults. When starting up, system self-inspection is performed first, including CPU, memory, A/D process channel self-inspection, and prompt information is displayed. If a fault is diagnosed, the fault code will be displayed, and if there is no fault, it will enter the temperature measurement stage.

3. Shield the influence of sensor failure through redundant components.

In addition, it should be noted that, unless otherwise specified or pointed out, the terms “first”, “second”, “third” and other descriptions in the specification are only used to distinguish each component, element, step, etc. in the specification, and It is not used to represent the logical relationship or sequential relationship between various components, elements, and steps.

It can be understood that although the present invention has been disclosed above with preferred embodiments, the above embodiments are not intended to limit the present invention. For any person skilled in the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or be modified to be equivalent to equivalent changes. Example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, which do not deviate from the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims (3)

1. a wind-driven generator group wheel box temperature collecting device, it is characterised in that including: parallel join Identical the first temperature acquisition bang path, the second temperature acquisition bang path and the 3rd temperature acquisition transmission road Footpath；Wherein when any temperature acquisition bang path breaks down, this temperature acquisition bang path disconnects automatically, And carrying out automatic data processing, other temperature acquisition bang path normally works simultaneously, and described first temperature is adopted Collection bang path includes the first bridge, the first variable connector, the first amplifier and the first modulus being sequentially connected with Transducer；The second bridge that described second temperature acquisition bang path includes being sequentially connected with, the second variable connector, Second amplifier and the second analog-digital converter；Described 3rd temperature acquisition bang path includes be sequentially connected with Three bridges, the 3rd variable connector, the 3rd amplifier and the 3rd analog-digital converter；

Described wind-driven generator group wheel box temperature collecting device also includes:

Beacon element, for detecting and react the first bridge, the second bridge and the duty of the 3rd bridge, And would indicate that the indication signal of the duty of the first bridge, the second bridge and the 3rd bridge inputs respectively To the first variable connector, the second variable connector and the first input end of the 3rd variable connector；

Described wind-driven generator group wheel box temperature collecting device also includes: host circuit；

Wherein, the first bridge, the second bridge and the 3rd bridge are used for gathering wind-driven generator group wheel box temperature Spend and would indicate that the signal of the wind-driven generator group wheel box temperature collected is separately input into the first multichannel and opens Pass, the second variable connector and the second input of the 3rd variable connector；

First variable connector, the second variable connector and the 3rd variable connector are respectively according to from respective first input End and the signal that receives of the second input respectively via the first amplifier and the first analog-digital converter, second put Big device and the second analog-digital converter and the 3rd amplifier and the 3rd analog-digital converter export warp to host circuit Go through and amplify and the variable connector output signal of analog digital conversion.

Wind-driven generator group wheel box temperature collecting device the most according to claim 1, it is characterised in that Also include: the recovery reentry unit being connected with host circuit, for making system according to the instruction of host circuit Resume work.

Wind-driven generator group wheel box temperature collecting device the most according to claim 1, it is characterised in that Host circuit is from the first temperature acquisition bang path, the second temperature acquisition bang path and the 3rd temperature acquisition In the case of the data that bang path receives are in target offset scope, it is judged that do not have fault and try to achieve from First temperature acquisition bang path, the second temperature acquisition bang path and the 3rd temperature acquisition bang path receive The meansigma methods of the data arrived, as gear-box Current Temperatures.