JPS62214275A - Abnormality detecting system for windmill - Google Patents

Abstract

PURPOSE:To synthetically decide abnormality, by a method wherein an air velocity, the output of a generator, and the number of revolutions of a turbine are detected, the results are compared with a state in that each detecting device is operated in a normal manner, and when a change amount exceeds an allowable value, an alarm is reported. CONSTITUTION:An air velocity signal from an air speedometer 3, a generator output signal from a generator 4, and a number of revolutions signal from a turbine 5 are transmitted to a computing control device 9. Data obtained by the computing control device 9 are sent to a comparing deciding device 10, each data is compared with a normal operation range in which a specified allowable range is set, and when it exceeds the operation range, an operation state is decided to be abnormal to report an alarm. This constitution enables synthetic decision of abnormality from two aspects of software and hardware.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wind turbine abnormality detection system applied to a public safety device for a wind turbine for power generation.

[Conventional technology]

Generally, power generation wind turbines are equipped with a safety device, and this safety device has the ability to directly detect abnormalities unique to the equipment that constitutes the wind turbine.

(Problems to be Solved by the Invention) Conventional security devices only have an abnormality detection function that directly detects abnormalities unique to the equipment, so it is difficult to detect abnormalities based on the related operations between equipment, and the detection results are difficult to detect. also depends on the operating state of the safety device. Therefore, there is a drawback that accurate abnormality detection cannot be performed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a wind turbine abnormality detection system that is capable of detecting not only abnormalities unique to each device but also abnormalities between devices, and capable of comprehensively and accurately detecting abnormalities.

[Means for solving problems]

The present invention has taken the following measures to solve the above problems and achieve the object. In other words, the wind speed 2 during windmill operation
The generator output and turbine rotation speed were continuously sampled, and the sampled data was calculated and averaged using a microcomputer to obtain the relationship between the average wind speed and the average generator output, and a certain tolerance range was set for this. The operating state of the wind turbine is determined to be abnormal when it is compared with a normal operating range and deviates from this operating range.

[Effect]

This detection system compares the operating results of multiple devices with the state in which each device is operating normally, and issues an alarm if the amount of change exceeds the allowable value, so it is an indirect monitoring system. However, by using the self-diagnosis function, it becomes possible to comprehensively determine abnormalities from both software and hardware aspects.

〔Example〕

FIG. 1 is a V configuration diagram showing an embodiment of the present invention. 1st
In the figure, reference numeral 1 denotes a propeller which is the main body of a wind turbine, and this propeller 1 is rotatably attached to a nacelle 2.

An anemometer 3 is attached to the outside of the nacelle 2. Further, inside the nacelle 2, a power generating unit 114 connected to the shaft of the propeller 1 and a turbine 5 are housed. Anemometer 3
The wind speed signal 9 from the generator I ring 4 and the rotational speed 1i from the turbine 5 shall be transmitted via the signal transmission line 6.7.8 to the control unit 9/\\, respectively. It has become. The arithmetic and control unit 9 has a sampling circuit that samples each transmitted signal every 0.2 seconds, and calculates an average value for several minutes from each signal sampled by this sampling circuit, and calculates the [average wind speed and Turbine rotation speed J.

It consists of a microcomputer that obtains the relationship between "average wind speed and average generator output."

Data indicating the relationship between the average wind speed and the average turbine rotation speed, and between the average wind speed and the average generator output obtained by the arithmetic control wJ device 9 is sent to the comparison and determination device 10.

The comparison/judgment device 10 compares each of the above data with a normal operating range with a certain allowable range, and when it deviates from the operating range, determines that the operating state of the wind turbine is abnormal and sends out an alarm signal. It has become a thing.

In this detection system configured as described above, when the wind turbine starts operating, it is monitored whether the wind speed and the turbine rotation speed are within the normal range using the characteristic curve of "wind speed and turbine rotation speed" shown in FIG.

When the wind speed increases, it is monitored whether it is within the normal operating range using the characteristic curve of "wind speed and generator output" shown in FIG.

Since the variable propeller wind turbine controls the propeller angle depending on wind speed conditions, if a command signal is not issued from the control device, the l1lrJ will deviate from its normal operating characteristics. Further, if an abnormality such as damage occurs to the equipment, normal operating characteristics cannot be ensured, and the operating state falls into an abnormal range.

According to this detection system, an alarm is issued in such a case, so that the abnormality can be accurately detected.

According to this embodiment, it is possible to not only detect an abnormality unique to the equipment but also monitor the operating state of the control device, resulting in a safety system with a self-diagnosis function. Since wind turbines rotate outdoors without protective walls, the safety equipment must have double and triple protection, but this anomaly detection system enables comprehensive diagnosis, simplifying the configuration and increasing reliability. It becomes a security system.

Note that the present invention is not limited to the embodiments described above, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the present invention, the system compares the operation results of multiple devices with the state in which each device is operating normally, and issues an alarm if the amount of change exceeds the allowable value, so it is an indirect monitoring system. However, it has a self-diagnosis function and can comprehensively determine abnormalities from both software and hardware aspects. Therefore, it is possible to detect not only abnormalities unique to each device, but also abnormalities between devices, and it is possible to provide a wind turbine abnormality detection system capable of comprehensively and accurately detecting abnormalities.

[Brief explanation of drawings]

Figures 1 to 3 are diagrams showing one embodiment of the present invention. Figure 1 is a diagram showing the configuration of this detection system, Figure 2 is a characteristic diagram of average wind speed and turbine rotation speed, and Figure 3 is a diagram showing an example of the present invention. is the average wind speed and departure ff
It is a characteristic diagram showing the relationship with the i machine output. 1... propeller, 2... nacelle, 3... anemometer,
4... Generator, 5... Turbine, 6-8... Signal transmission line, 9... Arithmetic control device, 10... Comparison/judgment device.

Claims (1)

[Claims] During wind turbine operation, the wind speed, generator output, and turbine rotation speed are continuously sampled, and the sampled data is calculated and averaged by a microcomputer to obtain the relationship between the average wind speed and the average generator output. A wind turbine abnormality detection system that compares the operating state with a normal operating range with a set tolerance range and determines that the operating state of the wind turbine is abnormal when the operating state deviates from this operating range.