CN217002168U - Icing monitoring system for assisting wind turbine generator - Google Patents

Abstract

The icing monitoring system comprises a data acquisition device, a signal transmission and processing module and a main control system, wherein the data acquisition device is an icing sensor, and the signal transmission and processing module comprises a data connecting line and a control cabinet and is used for transmitting and processing acquired data and judging whether icing occurs or not; the main control system receives the icing judgment result, sends an icing alarm signal and performs necessary safety control on the wind generating set; the icing sensor is arranged at the top of the cabin; the top of the engine room which has the same altitude as the blade root and does not move at rest is selected, when the icing signal is monitored, the icing early warning is given, the cost is low, the operation is reliable, and the influence of the installation environment is not easy to affect; an icing sensor does not need to be arranged on the surface of the blade, so that the influence of the installation of the sensor on the performance of the blade is avoided; the icing state can be monitored and early warned in real time, and the safe and stable operation of the wind generating set is effectively guaranteed.

Description

Icing monitoring system for assisting wind turbine generator

Technical Field

The utility model belongs to the technical field of wind power generation, and particularly relates to an icing monitoring system for an auxiliary wind turbine generator.

Background

With the continuous enlargement of the scale of the wind generating set installed in cold and humid areas, the problem of blade icing of the wind generating set is increasingly prominent. After the blades are frozen, the external shapes of the blades can be changed, and the corresponding aerodynamic performance and load distribution are also changed, so that the generating efficiency of a unit is reduced, and even safety accidents can be caused. Therefore, an icing monitoring system is necessary to be installed on the wind turbine generator so as to give an early warning in time and guarantee safety.

At present, icing monitoring methods of wind turbine generators mainly include an electrical method, a mechanical method, an optical method and a waveguide method. Various forms of icing monitoring sensors have been produced based on the above described monitoring methods and corresponding monitoring principles. However, most of the existing icing sensors are installed on the surface of the blade of the wind turbine generator, so that the installation and subsequent maintenance are inconvenient, the cost is high, and the monitoring effect is to be improved; even if the sensor is not reasonably installed on the surface of the blade, the aerodynamic characteristics of the blade can be damaged, and the normal generating efficiency of the unit is affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides an icing monitoring system for an auxiliary wind turbine generator, which is characterized in that the top of a cabin with the same altitude as a blade root and being static and not moving is selected, an icing sensor is arranged at the top of the cabin to monitor an icing signal, and the safety of the wind turbine generator can be monitored and guaranteed in an auxiliary manner.

In order to achieve the purpose, the utility model adopts the technical scheme that: an icing monitoring system for assisting a wind turbine generator comprises a data acquisition device, a signal transmission and processing module and a main control system, wherein the data acquisition device is an icing sensor, and the signal transmission and processing module comprises a data connecting line and a control cabinet and is used for transmitting and processing acquired data and judging whether icing occurs or not; the main control system receives the icing judgment result, sends an icing alarm signal and performs necessary safety control on the wind generating set; the icing sensor is arranged at the top of the cabin; the icing sensor is provided with a heating wire, and the heating wire is connected into the cabin control cabinet of the wind driven generator through a cable.

The icing sensor is an optical, electrical or mechanical icing sensor.

The icing sensor is an ultrasonic icing sensor, and based on the measurement principle of ultrasonic resonance, an ultrasonic signal of the icing sensor is attenuated to judge icing after the icing sensor is iced.

The icing sensor is arranged on a mounting bracket of an anemorumbometer at the top of the nacelle.

The icing sensor is far away from an air outlet of the cooling system of the wind driven generator.

An annular lightning arrester at the top of the nacelle surrounds the icing sensor.

The heating temperature of the heating wire is not more than 10 ℃.

The icing sensor is provided with two.

Compared with the prior art, the utility model has at least the following beneficial effects: the system has simple structure and reliable operation, and is not easily influenced by the installation environment; according to the utility model, an icing sensor does not need to be arranged on the surface of the blade, so that the influence of the installation of the sensor on the performance of the blade is avoided; the top of the engine room which has the same altitude as the blade root and is static and does not move is selected, and an icing sensor is arranged at the top of the engine room to monitor an icing signal, so that the safe and stable operation of the wind turbine generator can be monitored in an auxiliary manner; installation and follow-up maintenance are convenient, can also reduce cost, and monitoring effect is better, can melt the icing, sets up the heating wire in freezing sensor outside moreover, can melt the icing, and the external temperature is not enough to melt the icing yet, but under the condition that does not possess the condition of freezing again in fact, can monitor more accurate information, avoids freezing the sensor and continuously receives the signal of freezing, influences the fan operation decision-making.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Wherein the meanings of the reference symbols are as follows: 1. a blade; 2. a nacelle; 3. an anemometer; 4. a wind direction indicator; 5. an anemorumbometer support; 6. an icing sensor; 7. an annular lightning arrester.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Various structural schematics according to the disclosed embodiments of the utility model are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.

As shown in fig. 1, an icing monitoring system for assisting a wind turbine generator comprises a data acquisition device, a signal transmission and processing module and a main control system, wherein the data acquisition device is an icing sensor 6; the signal transmission and processing module comprises a data connecting line and a control cabinet and is used for transmitting and processing the acquired data and judging whether icing occurs or not; the main control system receives the icing judgment result, sends an icing alarm signal and carries out preset safety control on the wind generating set; set up the heater strip on freezing sensor 6, the heater strip passes through the cable access aerogenerator cabin switch board, and freezing sensor 6 possesses self electrical heating deicing function, and after it monitored freezing, freezing sensor 6 heated self to get rid of the ice that gathers on its sensor surface, can not influence the monitoring next time and freeze the operating mode.

The icing sensor 6 is based on the measurement principle of ultrasonic resonance, and when the sensor is iced, the ultrasonic signal of the sensor is attenuated, so that icing can be judged; the icing sensor 6 is integrated on a mounting bracket of the cabin anemometer and the anemoscope, and the mounting bracket is fixed on the top of the cabin 2.

The ice sensor 6 is located away from the wind turbine cooling system exhaust to ensure that it is not affected by the hot air exiting the wind turbine cooling system.

The annular lightning conductor 7 surrounds the icing sensor 6, ensuring that the icing sensor 6 is within an effective lightning protection range.

The icing sensor 6 is respectively led into the cabin control cabinet of the wind driven generator through a data connecting line and a cable, on one hand, collected signals are further transmitted to the wind power plant main control room through the cabin control cabinet, and on the other hand, the cabin control cabinet supplies power to start the heating and deicing functions of the icing sensor 6.

Two icing sensors 6 are arranged, a heating wire is started to melt ice on the surface of one icing sensor 6, and if the icing sensor after melting ice freezes again within a set time, the icing sensor is only heated to melt ice; and if the ice does not freeze within the set time after the ice is melted, heating the surface of the other icing sensor for melting ice, and simultaneously carrying out icing monitoring. The icing sensor 6 does not actively melt ice in an icing state, can sense whether the environment has ice melting conditions or not, and provides reference data for the running of the fan.

The icing sensor 6 is an optical, electrical or mechanical icing sensor, and is preferably a commercially available product. The icing sensor 6 is respectively led into an engine room control cabinet of the wind driven generator through a data connecting wire and a cable, on one hand, collected signals are further transmitted to a main control room of a wind power plant through the engine room control cabinet, on the other hand, the engine room control cabinet supplies power to start the heating and deicing functions of the icing sensor, the heating temperature of the heating wire is not more than 10 ℃, and the performance of the icing sensor cannot be influenced.

Based on the icing monitoring system, the icing sensor 6 acquires icing information and feeds the information back to the control cabinet, the control cabinet sends an icing alarm signal, and a fan operation strategy is adjusted according to the icing alarm signal; and when the control cabinet receives the ice melting signal, the heating wire is controlled to heat and melt ice for the icing sensor 6.

The working principle of the icing monitoring system for the auxiliary wind turbine generator set is as follows: under the normal operation state of the wind turbine generator, the blades swing regularly. In particular, the wind sweeping speed of the rotating blade tip is high, which is not favorable for icing. The blade root rotational speed is lower compared to the blade tip. In a cold and humid external environment, when the temperature and humidity reach a certain degree, the blade root of the blade is firstly frozen. Therefore, the top of the static and motionless cabin with the same altitude as the blade root is selected, the icing sensor 6 is arranged at the top of the cabin, when the icing signal is monitored, the blade can be considered to have the icing risk, and the icing early warning is given at the moment, so that the safety of the wind turbine generator can be effectively guaranteed.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides an icing monitoring system of supplementary wind turbine generator system which characterized in that: the system comprises a data acquisition device, a signal transmission and processing module and a master control system, wherein the data acquisition device is an icing sensor (6), and the signal transmission and processing module comprises a data connecting line and a control cabinet and is used for transmitting and processing acquired data and judging whether icing occurs or not; the main control system receives the icing judgment result, sends an icing alarm signal and performs necessary safety control on the wind generating set; the icing sensor (6) is arranged at the top of the cabin, a heating wire is arranged on the icing sensor (6), and the heating wire is connected into the cabin control cabinet of the wind driven generator through a cable.

2. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: the icing sensor (6) adopts an optical icing sensor, an electrical icing sensor or a mechanical icing sensor.

3. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: the icing sensor (6) is an ultrasonic icing sensor, and based on the measurement principle of ultrasonic resonance, an ultrasonic signal of the sensor is attenuated to judge icing after the sensor is iced.

4. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: the icing sensor (6) is arranged on a mounting bracket of an anemorumbometer at the top of the engine room.

5. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: the icing sensor (6) is far away from an exhaust port of a cooling system of the wind driven generator.

6. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: an annular lightning arrester (7) at the top of the nacelle surrounds the icing sensor (6).

7. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: the heating temperature of the heating wire is not more than 10 ℃.

8. The icing monitoring system of an auxiliary wind turbine according to claim 1, characterized in that: two icing sensors (6) are arranged.

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