JP3241623U - Motor monitoring system for wind power units - Google Patents

Abstract

To monitor the temperature of the generator itself, the temperature of the shaft of the generator (stator winding box portion) and the reactance temperature of the generator (rotor winding box portion), for different parts of the generator. A motor monitoring system for a wind power unit is provided by providing and monitoring different thermal imaging devices at the wind power unit. The method includes three thermal imagers ID1-ID3, including at least one serial port and an Ethernet interface, and the serial port of each thermal imager is connected to the PLC controller of the main control system of the wind power unit via a data line. 3 corresponding serial ports, each thermal imager's Ethernet interface is connected via a network cable to the corresponding interface of the switch, and the switch is data-connected to the monitoring screen device. [Selection drawing] Fig. 1

Description

This utility model relates to the technical field of monitoring of wind power units, more specifically to a motor monitoring system for wind power units, and more specifically to monitoring the temperature of a wind power unit and its operating status continuously with a thermal imager. It relates to a response system that can be monitored without

A doubly fed wind power unit mainly uses a gearbox to increase the low rpm transmitted by the wind turbine to the high rpm required by the generator, and then the generator rotates at high rpm. The magnetic field that surrounds it eventually converts it into electrical energy and outputs it to the power grid. During high-speed operation of the generator, each component of the motor heats up, and the temperature of the entire motor rises, affecting the stable operation of the power generation unit. In order to effectively maintain the stability of the operation of the motor, when the temperature rises, the unit's PLC control system will enter a special control state with a high temperature of the generator, and control the change of the impeller angle to By reducing the speed of the generator, it maintains the temperature of the generator, conversely, if the temperature is too low, the unit's PLC control system must control the idling of the motor, and the temperature is in an operational state. When it becomes, turn on the power and operate.

Conventional temperature detection systems for wind power units mostly use thermal resistors (abbreviated as PT) whose resistance changes with temperature to detect temperature. The failure rate is high, the service life is shortened, the control accuracy of the PT is greatly reduced during use, and there is a problem that failure cannot be detected. If the performance of the PT is degraded or damaged, the state of the power generator may become a blind area, and unstable operation of the wind power generator is likely to occur frequently. Therefore, there is a need to design a more stable surveillance system.

In order to solve the above problems, the present utility model provides a motor monitoring system for wind power units. Different thermals for different parts of the generator to monitor the temperature of the generator itself, the temperature of the generator shaft (stator winding box section) and the generator reactance temperature (rotor winding box section). By providing and monitoring an imaging device, it ensures that the heat dissipation system of the power generation unit can be fully effective, and ensures that the wind power unit maintains a good operating condition.

In order to achieve the above objectives, this utility model:
three thermal imagers, a first thermal imager, a second thermal imager and a third thermal imager, each thermal imager including at least one serial port and at least one Ethernet interface respectively; The at least one serial port of the major is respectively connected to a corresponding serial port of the PLC controller of the main control system of the wind power unit via a data line, and the at least one Ethernet interface of each thermal imager is connected to a network cable. to a corresponding interface of a switch via a switch, said switch being data-connected to a monitoring screen device;
The first thermal imager is a point irradiation type thermal imager, which is suspended on the upper wall of the engine room by a first bracket, and the camera is positioned above the stator winding box of the generator from top to bottom. irradiate,
The second thermal imager is a point-illumination thermal imager, suspended on the upper wall of the engine room by a second bracket, and the camera is positioned above the rotor winding box of the generator from top to bottom. and the third thermal imager is a front illuminated thermal imager, fixed to the side wall of the engine room by a third bracket, the camera illuminating the side of the generator. Provide a motor monitoring system.

In one embodiment of the utility model, said PLC controller is also data-connected to the SCADA system of the wind farm.
Compared with the prior art, the motor monitoring system of the wind power unit provided by the present utility model provides different thermal imaging devices for different parts of the generator to monitor, so that when the generator runs The emitted invisible infrared energy can be converted into a visible thermal image to determine the temperature, which avoids the unstable problem of temperature monitoring due to thermal resistance, and provides a stable and continuous monitoring of the wind power unit. It is possible to maintain a good operating state.

In order to describe the embodiments of the present utility model or the technical solutions of the prior art more clearly, the following briefly introduces the drawings required for the description of the embodiments or the prior art. The drawings are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative efforts.
1 is a system architecture diagram of one embodiment of the present utility model; FIG. FIG. 4 is a serial port connection architecture diagram of each thermal imager in an embodiment of the present utility model; FIG. 4 is an Ethernet port connection architecture diagram of each thermal imager in an embodiment of the present utility model;

: ID1, ID2, ID3—thermal imager, 11—first bracket, 12—second bracket, 13—third bracket, 21—stator winding box, 22—rotor winding box, 3—PLC controller, 4—SCADA system, 5—switch, 6—monitoring screen device.

The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the drawings of the embodiments of the present utility model. only some and not all examples. Based on the embodiments in this utility model, all other embodiments obtained by persons skilled in the art without creative efforts fall within the protection scope of this utility model.
FIG. 1 is a system architecture diagram of one embodiment of the present utility model, as shown in FIG. 1, this embodiment provides a motor monitoring system for a wind power unit. The system includes:
including three thermal imagers, a first thermal imager ID1, a second thermal imager ID2 and a third thermal imager ID3;
The first thermal imager ID1 is a point irradiation type thermal imager (i.e. a point thermometer) and is suspended on the upper wall of the engine room by a first bracket 11, and its camera is located in the stator winding box of the generator. 21 from top to bottom and used to monitor the temperature of the stator winding box 21 by point irradiation,
The second thermal imager ID2 is a point irradiation type thermal imager (i.e. a point thermometer), suspended on the upper wall of the engine compartment by a second bracket 12, and its camera is positioned on the rotor winding box of the generator. 22 and used to monitor the temperature of the rotor winding box 22 by point illumination,
The first thermal imager ID1 and the second thermal imager ID2 are point irradiation type thermal imagers (point thermometers), and the range to be irradiated is small. A thermal imager with point irradiation function can be selected from brands such as H series, and the present embodiment does not limit the brand and model number of the thermal imager, and the present embodiment is provided with irradiation function. In addition, these two thermal imagers are suspended on the upper wall of the engine loop by a fixed bracket, so that the irradiation point of the thermal imagers can be made more stable, thereby enhancing the effect of temperature monitoring. .

The third thermal imager ID3 is a front-illuminated thermal imager, that is, a thermal imager capable of area illumination, and must have a wider illumination viewing angle. Fixed to the side wall, the camera illuminates the side of the generator,
The third thermal imager ID3 is a front-illuminated thermal imager, used to monitor the entire generator, and because of the large area to be A thermal imager with a large irradiation area can be selected from brands such as the H series, and this embodiment does not limit the brand and model number of the thermal imager. Using the same brand and different model thermal imagers for the first thermal imager ID1, the second thermal imager ID2 and the third thermal imager ID3 in this embodiment can not only meet the illumination needs of each point, but also , can reduce the difficulty of debugging and maintenance.

Since the wind power unit motors can emit invisible infrared energy, this embodiment uses different types of thermal imaging devices for different parts of the generator to convert the invisible infrared energy into visible thermal images. This solves the problem of not being able to determine the state of the generator temperature monitoring device (such as the above PT) in the prior art, and this embodiment uses an existing commercially available thermal imaging device, The temperature temperature analysis process by thermal image is its own function, and the present embodiment does not limit the thermal image analysis process.
Here, each thermal imager ID1, ID2 and ID3 each includes at least one serial port, and said at least one serial port of each thermal imager ID1, ID2 and ID3 is connected to the wind power unit via a data line. respectively connected to corresponding serial ports of the PLC controller 3 of the main control system of the wind farm, the PLC controller 3 is also data connected to the SCADA system 4 of the wind farm, the SCADA system is a data acquisition and supervisory control system, i.e. the monitoring Supervisory Control And Data Acquisition System.

FIG. 2 is a serial port connection architecture diagram of each thermal imager in one embodiment of the present utility model. As shown in FIG. The serial port is connected through the data line to the position of the serial port 1 of the PLC controller 3 of the main control system of the wind power unit, and one serial port of the second thermal imager ID2 for point irradiation is connected through the data line. is connected to the serial port 2 position of the PLC controller 3 of the main control system of the wind power unit, and one serial port of the third thermal imager ID 3 for surface irradiation is connected to the main control of the wind power unit through the data line. Connected to the serial port 3 location of the PLC controller 3 of the system, the PLC controller 3 of the main control system of the wind power unit is one component of the existing wind power unit, By receiving the thermal imager data by this component, it is possible to simplify the installation and facilitate the wiring layout in the engine loop. Since the PLC controller 3 is also data-connected to the SCADA system 4 of the wind farm, the temperature data collected by the three thermal imagers are used by the PLC controller to get an overall picture of the temperature situation of each wind farm unit. It may be transmitted to the SCADA system 4 via the controller 3 using the Modbus protocol method (conventional transmission method). The PLC controller 3 and the SCADA system 4 are existing equipment of the wind farm and the utility model does not repeat their function and the other components connected to them.

Here, each thermal imager ID1, ID2 and ID3 all includes at least an Ethernet interface, and at least one Ethernet interface of each thermal imager ID1, ID2 and ID3 is connected to a corresponding interface of the switch 5 via a network cable. , and the switch 5 is data connected to a monitor screen device 6 .

FIG. 3 is an Ethernet port connection architecture diagram of each thermal imager in one embodiment of the present utility model, as shown in FIG. 3, different interfaces of the switch correspond to different IP addresses, and each thermal imager has a different ID number, so the three thermal imagers ID1, ID2 and ID3 may be data connected to the switch 5 via Ethernet interfaces and network cables, and the switch 5 is data connected to the monitor screen device 6. , which allows remote fine-tuning, e.g. focal length adjustment, illumination angle adjustment, etc., on different thermal images via the monitoring screen device 6, which includes the top of the tower of the wind power unit. Since it can be achieved remotely without climbing to the top, maintenance after installation becomes more convenient.

Compared with the prior art, the motor monitoring system of the wind power unit provided by this utility model provides different thermal imaging devices for different parts of the generator to monitor, so that when the power generating unit runs The emitted invisible infrared energy can be converted into a visible thermal image to determine the temperature, which avoids the unstable problem of temperature monitoring due to thermal resistance, and provides a stable and continuous monitoring of the wind power unit. It is possible to maintain a good operating condition.

Those skilled in the art can appreciate that the drawings are only schematic representations of one embodiment and that the modules or processes in the drawings are not required to implement the present utility model.

Those skilled in the art will appreciate that the modules of the device in the example may be distributed in the device in the example according to the description of the example, and may be located in one or more devices different from this example with corresponding changes. can understand. The modules of the above embodiments may be combined into one module, or may be further divided into multiple sub-modules.

Finally, it should be explained that the above examples are only for explaining the technical solutions of the present utility model, and do not limit it. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments, and for some technical features therein It should be understood that equivalent substitutions can be made in the same way, and these modifications or substitutions do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions in the embodiments of the utility model.

Claims (2)

three thermal imagers, a first thermal imager, a second thermal imager and a third thermal imager, each thermal imager including at least one serial port and at least one Ethernet interface respectively; The at least one serial port of the major is respectively connected to a corresponding serial port of the PLC controller of the main control system of the wind power unit via a data line, and the at least one Ethernet interface of each thermal imager is connected to a network cable. to a corresponding interface of a switch via a switch, said switch being data-connected to a monitoring screen device;
The first thermal imager is a point irradiation type thermal imager, which is suspended on the upper wall of the engine room by a first bracket, and the camera is positioned above the stator winding box of the generator from top to bottom. irradiate,
The second thermal imager is a point-illumination thermal imager, suspended on the upper wall of the engine room by a second bracket, and the camera is positioned above the rotor winding box of the generator from top to bottom. and the third thermal imager is a front illuminated thermal imager, fixed to the side wall of the engine room by a third bracket, the camera illuminating the side of the generator. Motor monitoring system. 2. A wind power unit motor monitoring system according to claim 1, wherein said PLC controller is also data-connected to a wind power plant SCADA system.

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