CN118293030A - Distributed time sequence electric heating control system and method for blades of electric heating fan - Google Patents
Distributed time sequence electric heating control system and method for blades of electric heating fan Download PDFInfo
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- CN118293030A CN118293030A CN202410477610.4A CN202410477610A CN118293030A CN 118293030 A CN118293030 A CN 118293030A CN 202410477610 A CN202410477610 A CN 202410477610A CN 118293030 A CN118293030 A CN 118293030A
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- 238000005485 electric heating Methods 0.000 title claims abstract description 144
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- 238000010438 heat treatment Methods 0.000 claims abstract description 100
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Abstract
The invention provides a time sequence electric heating control system and a method realized by external control, wherein the system comprises a distributed time sequence electric heating control system of an electric heating fan blade, and the system comprises the following components: a blade temperature sensor, a heating element, a control unit and a time sequence controller which are arranged on the electric heating fan; the electric heating fans are divided into a plurality of groups according to the positions, each group of electric heating fans consists of a plurality of blades, and each blade corresponds to at least one blade temperature sensor, at least one heating element and at least one control unit; the input end of the time schedule controller is connected with a plurality of blade temperature sensors, the output end of the time schedule controller is respectively connected with a plurality of control units, and each control unit is connected with one heating element in a control manner to form a distributed heating element. The system can realize the control of the blades of the electric heating fan respectively, and improves the control flexibility and efficiency. The invention provides a method for removing ice layer on the surface of the blade quickly and effectively without damaging the blade.
Description
Technical Field
The invention relates to the field of electric heating fans, in particular to a distributed time sequence electric heating control system and method for blades of an electric heating fan.
Background
In cold weather environment, a large amount of ice layers are easily accumulated on the blades of the wind driven generator, so that the performance of the wind driven generator can be influenced, and even the wind driven generator can be damaged. Meanwhile, as the three blades of each electric heating fan are distributed, the heat output of different blades and different areas of the same blade is different, and the uniformity of the heating effect is affected.
Therefore, how to realize the distributed time sequence electric heating control of the blades of the electric heating fan, improve the uniformity of the heating effect and reduce the electric energy consumption is a problem to be solved in the field.
The traditional electric heating scheme is generally used for controlling all blades through a central control unit, and has the problems of inconvenient operation, low control efficiency and the like.
Disclosure of Invention
The invention provides a distributed time sequence electric heating control system and a distributed time sequence electric heating control method for blades of an electric heating fan.
In order to achieve the above purpose, the invention adopts the following technical scheme:
An electric heating fan blade distributed timing electric heating control system, comprising: a blade temperature sensor, a heating element, a control unit and a time sequence controller which are arranged on the electric heating fan;
The electric heating fans are divided into a plurality of groups according to positions, each group of electric heating fans consists of a plurality of blades, and each blade corresponds to at least one blade temperature sensor, at least one heating element and at least one control unit; the input end of the time schedule controller is connected with a plurality of blade temperature sensors, the output end of the time schedule controller is respectively connected with a plurality of control units, and each control unit is controlled to be connected with one heating element to form a distributed heating element;
The temperature condition of the blade surface is monitored by a blade temperature sensor on any blade and is fed back to a time sequence controller, and the time sequence controller adopts a time sequence control method to control a control unit on the blade to start or close a corresponding heating element and is used for carrying out distributed time sequence electric heating control on the electric heating fan blade.
As a further improvement of the invention, the electric heating fan further comprises a tower base controller arranged on the electric heating fan, wherein the tower base controller controls the time sequence controller.
As a further improvement of the invention, the ice detector and the wind farm ice removal control computer are also included; the icing detector detects the icing condition of each electric heating fan, and the wind farm deicing control computer 19 controls the tower foundation controller according to the icing condition.
As a further development of the invention, the control unit is a power controller.
As a further improvement of the invention, the heating element is an electric heating film, and the power controller is controlled by the power supply lightning protection box to be connected with the electric heating film.
As a further improvement of the present invention, the electric heating film includes a PS electric heating film and an SS electric heating film.
As a further improvement of the invention, the heating element is a pneumatic heating device, and the power controller is connected with the pneumatic heating device in a control manner.
A distributed time sequence electric heating control method for an electric heating fan blade comprises the following steps:
Dividing the blades of the electric heating fan into a plurality of groups according to the positions of the blades; setting a corresponding heating controller for each group of blades, wherein the controller comprises a time sequence controller and a power controller;
The time sequence controller distributes heating time and power one by one according to the working state and the demand condition of the blade, controls the switching time and the switching period of the power controller, and transmits specific heating instructions to the corresponding distributed heating elements through control signals for time sequence control of the electric heater;
the power controller controls the current level of the heating element for controlling the power of the heating element.
As a further improvement of the present invention, the timing controller further includes, before operation:
The deicing detector detects the icing condition of the blades of the electric heating fan, if the blades of the electric heating fan are iced, the deicing system is started, otherwise, the deicing system stands by;
And (3) self-checking the deicing system, judging whether the system is normal, if so, starting the heating system to operate, and if so, waiting.
As a further improvement of the present invention, in the timing controller control process, further comprising:
When the heating operation is performed, the temperature sensor transmits the surface temperature of the blade to the control computer, and the control computer judges whether to adjust parameters to continue heating or not according to the heating temperature time, or the deicing is finished and heating is stopped.
Compared with the prior art, the invention has the advantages that:
through the design of grouping the blades, time sequence control and power control, the flexibility and the efficiency of control are improved, the distributed time sequence electric heating control of the blades of the electric heating fan is realized, the uniformity of the heating effect is improved, the electric energy consumption is reduced, and the electric heating fan has practicability and economy. Meanwhile, the method can be optimized and adjusted according to different requirements, and an ideal control effect is achieved. The invention provides a method for removing ice layer on the surface of the blade quickly and effectively without damaging the blade.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. In the drawings:
FIG. 1 is a schematic diagram of a distributed time-series electric heating control system for an electric heating fan blade according to embodiment 1;
FIG. 2 is a circuit diagram of a distributed timing electrical heating control system for an electrical heating fan blade according to example 1;
FIG. 3 is a schematic diagram of deicing and heating logic of an electric heating fan according to embodiment 1;
FIG. 4 is a schematic structural diagram of a blade distributed timing electric heating control system of an electric/gas integrated heating electric heating blower according to embodiment 2;
Fig. 5 is a circuit diagram of the distributed time-series electric heating control system for the electric/gas integrated heating electric heating fan blade given in example 2.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The first object of the present invention is to provide a distributed time-series electric heating control system for electric heating fan blades, comprising: a blade temperature sensor, a heating element, a control unit and a time sequence controller which are arranged on the electric heating fan;
The electric heating fans are divided into a plurality of groups according to positions, each group of electric heating fans consists of a plurality of blades, and each blade corresponds to at least one blade temperature sensor, at least one heating element and at least one control unit; the input end of the time schedule controller is connected with a plurality of blade temperature sensors, the output end of the time schedule controller is respectively connected with a plurality of control units, and each control unit is controlled to be connected with one heating element to form a distributed heating element;
The temperature condition of the blade surface is monitored by a blade temperature sensor on any blade and is fed back to a time sequence controller, and the time sequence controller adopts a time sequence control method to control a control unit on the blade to start or close a corresponding heating element and is used for carrying out distributed time sequence electric heating control on the electric heating fan blade.
The system of the invention realizes time sequence electric heating control through external control, can realize the control of the blades of the electric heating fan respectively, and improves the control flexibility and efficiency. The invention provides a method for removing ice layer on the surface of the blade quickly and effectively without damaging the blade.
The invention relates to a blade distributed time sequence electric heating control system of an electric heating fan, which comprises a blade temperature sensor, a heating element, a control unit and the like. By monitoring the temperature conditions of the blade surface, the control unit can activate or deactivate the heating element as required, thereby achieving the purpose of deicing. The system can also realize remote operation in a wireless remote control or automatic control mode, and the like, so that the flexibility and convenience of operation are improved.
In the above embodiment, the electric heating fan further comprises a tower base controller arranged on the electric heating fan, and the tower base controller controls the time sequence controller. The ice detector and the wind farm ice removal control computer are also included; the icing detector detects the icing condition of each electric heating fan, and the wind farm deicing control computer 19 controls the tower foundation controller according to the icing condition. The deicing control computer can remotely perform deicing control through the wind field deicing control.
As a preferred embodiment, the control unit is a power controller.
The embodiment of the invention provides two schemes, one of which is that the heating element is an electric heating film, and the power controller is controlled by the power supply lightning protection box to be connected with the electric heating film. The electric heating film comprises a PS electric heating film and an SS electric heating film. The PS electric heating film and the SS electric heating film are respectively arranged at different parts of the blade.
And secondly, the heating element is a pneumatic heating device, and the power controller is connected with the pneumatic heating device in a control manner.
At least one of the electric heating and the pneumatic heating or both of the electric heating and the pneumatic heating can be selected. Can be reasonably selected according to actual conditions.
Therefore, the controllable deicing system for the wind driven generator blade has the advantages of simplicity, high efficiency, reliability and the like, and can be suitable for various wind driven generators.
The second object of the invention is to provide a distributed time sequence electric heating control method for an electric heating fan blade, which comprises the following steps:
Dividing the blades of the electric heating fan into a plurality of groups according to the positions of the blades; setting a corresponding heating controller for each group of blades, wherein the controller comprises a time sequence controller and a power controller;
The time sequence controller distributes heating time and power one by one according to the working state and the demand condition of the blade, controls the switching time and the switching period of the power controller, and transmits specific heating instructions to the corresponding distributed heating elements through control signals for time sequence control of the electric heater;
the power controller controls the current level of the heating element for controlling the power of the heating element.
As an embodiment, before the timing controller is operated, the method further comprises:
The deicing detector detects the icing condition of the blades of the electric heating fan, if the blades of the electric heating fan are iced, the deicing system is started, otherwise, the deicing system stands by;
And (3) self-checking the deicing system, judging whether the system is normal, if so, starting the heating system to operate, and if so, waiting.
As an embodiment, in the control process of the timing controller, further includes:
When the heating operation is performed, the temperature sensor transmits the surface temperature of the blade to the control computer, and the control computer judges whether to adjust parameters to continue heating or not according to the heating temperature time, or the deicing is finished and heating is stopped.
More specifically, the method specifically comprises the following steps:
1) Dividing the blades of the electric heating fan into a plurality of groups according to the positions of the blades;
2) Setting corresponding electric heating controllers for each group of blades, wherein the controllers comprise a time sequence controller and a power controller;
3) The main control unit is provided with a time sequence control algorithm, the electric heating time and the power are distributed one by one according to the working state and the requirement condition of the blade, the time sequence controller controls the switching time and the switching period of the power controller, and specific electric heating instructions are transmitted to the corresponding distributed electric heating controllers through control signals, so that the time sequence control of the electric heater is realized;
4) The power controller controls the current of the electric heater to realize the power control of the electric heater;
5) The heating time and the heating power of each group of blades are uniformly distributed by controlling the sequential controller and the power controller, so that the distributed sequential electric heating control of the blades of the electric heating fan is realized.
Therefore, the distributed time sequence electric heating control method for the blades of the electric heating fan has the advantages of flexibility, high efficiency, reliability and the like, ensures the normal operation of the electric heating fan in a low-temperature environment, and has important commercial and social significance.
The present invention will be described in detail with reference to specific examples.
Example 1
As shown in fig. 1, the invention provides a distributed time sequence electric heating control system for an electric heating fan blade, which comprises an electric heater 1, an electric heating temperature sensor 2, a power controller 3, a slip ring 4, a time sequence controller 5, a cable and signal wire 6, a tower foundation controller 7, an icing detector 8 and a wind field deicing control computer 9.
The electric heating fans are divided into a plurality of groups according to the positions of the electric heating fans, each group of electric heating fans corresponds to one time sequence controller 5, each group of electric heating fans consists of 3 blades, each blade corresponds to one electric heater 3, one electric heating temperature sensor 2 and one power controller 3, the tower base controller 7 is used for controlling the electric heating control process of the whole electric heating fan, the icing detector 8 is used for detecting the icing condition of each electric heating fan, and the wind field deicing control computer 9 is used for controlling the operation of the whole wind field deicing system.
The time schedule controller 5 is composed of a clock chip, a timer, a trigger and the like, and the power controller 3 is composed of a power amplifier and a current sensor. The time sequence controller 5 controls the switching time, the switching period and the current of the power controller 3 to realize the time sequence control of the electric heater 1; the power controller 3 controls the current of the electric heater 1 to realize the power control of the electric heater 1. A circuit diagram of the electrical heating control system is shown in fig. 2.
Based on the above description, the specific implementation procedure of the control method corresponding to this embodiment is as follows:
1) The wind field deicing control computer 9 sends a control signal to the tower base controller 7 of each electric heating fan according to the icing condition fed back by the icing detector 8 of each electric heating fan, and is used for turning on the deicing power supply of the electric heating fan;
2) The time sequence controller 5 controls the switching time and the switching period of the power controller 3 according to the signals of the tower foundation controller 7;
3) The power controller 3 controls the current of the electric heater 1 according to the signal of the time schedule controller 5;
4) The electric heater 1 utilizes electric energy to electrically heat the surface of the blade;
5) The temperature sensor 2 transmits a blade surface temperature signal to the heating control computer 9;
6) The deicing control computer 9 adjusts control parameters of the time sequence controller 5 according to the blade surface temperature condition fed back by the electrothermal temperature sensor 2, and transmits the instruction to the power controller 3, and the time sequence controller realizes real-time regulation and control of the power controller, so that distributed time sequence electric heating control of the electric heating fan 1 is realized. Ensuring that each blade realizes the deicing function with the lowest energy consumption.
The electric heater 1 heats the heating film, the heating control of the heating film is completed by a local heating control computer 9, and the local control system is integrated with an electric heating fan main control SCADA through an optical fiber to realize remote control. The local heating control is mainly based on 2 kinds of control logic, namely time sequence control 1 and temperature control 2, and the judgment logic is shown in fig. 3. The deicing detector 8 detects that the blades of the electric heating fan are frozen, the deicing system is started, and otherwise, the deicing system stands by. And (3) self-checking the deicing system, judging whether the software and the hardware of the system are normal, if so, starting the heating system to operate, and if so, waiting. In the heating operation, the temperature sensor 2 transmits the surface temperature of the blade to the control computer 9, and the control computer judges whether to adjust parameters to continue heating or not according to the heating temperature time, or the deicing is finished and the heating is stopped.
Example 2
In another embodiment of the invention, a pneumatic heating and electric heating integrated deicing control system can be adopted, the power supply, communication and control of the air part and the electric part are integrated, the power supply distribution can be integrally coordinated, and the system structure is shown in figure 4.
The gas-electricity integrated heating control system comprises an electric heater 11 positioned on the surface of the blade, a pneumatic heater 10 positioned inside the blade, an electric/gas heating temperature sensor 12, a power controller 13, a slip ring 14, a time sequence controller, a pneumatic controller 15, a cable and signal wire 16, a tower foundation controller 17, an icing detector 18 and an air field deicing control computer 19.
Wherein, electric heater fan divides into a plurality of groups according to its position, and every group electric heater fan corresponds a time schedule controller and pneumatic controller 5, and every group electric heater fan comprises 3 blades, and every blade corresponds an electric heater 13, an electricity/gas heat temperature sensor 12 and a power controller 13, and tower base controller 17 is used for controlling the electric heating control of whole electric heater fan, and icing detector 18 is used for detecting every electric heater fan's icing condition, and wind field deicing control computer 19 is used for controlling the operation of whole wind field deicing system.
The timing controller and the pneumatic controller 15 are composed of a clock chip, a timer and a trigger, and the power controller 13 is composed of a power amplifier and a current sensor. The time schedule controller and the pneumatic controller 15 control the switching time, the switching period and the current of the power controller 13, so as to realize the time schedule control of the electric heater 11 and the pneumatic heater 10; the power controller 13 controls the current of the electric heater 11 to realize power control of the electric heater 11. The circuit diagram of the gas-electricity integrated heating control system is shown in fig. 5.
Based on the above description, the specific implementation procedure of the control method corresponding to this embodiment is as follows:
1) The wind field deicing control computer 19 sends a control signal to the tower base controller 17 of each electric heating fan according to the icing condition fed back by the icing detector 18 of each electric heating fan, and is used for turning on the deicing power supply of the electric heating fan;
2) The time sequence controller and the pneumatic controller 15 control the switching time and the switching period of the power controller 13 according to the signals of the tower foundation controller 17, and control the power controller 13 to realize the control of the switching time and the switching period of the pneumatic heater 10 and the electric heater 11;
3) The power controller 13 simultaneously controls the current of the electric heater 11 according to the signal of the time schedule controller 15;
4) The electric heater 11 electrically heats the blade surface by using electric energy;
5) The pneumatic heater 10 heats hot air blown out by the blower, and the heat is conveyed from the blade to the blade direction through the air pipe;
6) The temperature sensor 12 transmits the blade surface temperature signal to the heating control computer 19;
7) The deicing control computer 19 adjusts control parameters of the time sequence controller 15 according to the blade surface temperature condition fed back by the electrothermal temperature sensor 12, and transmits the instruction to the power controller 13, and the time sequence controller realizes real-time regulation and control of the power controller 13, so that distributed time sequence electric heating control of the electric heating fan is realized. Ensuring that each blade realizes the deicing function with the lowest energy consumption.
The device elements in the above embodiments are conventional device elements unless otherwise specified, and the structural arrangement, operation or control modes in the embodiments are conventional arrangement, operation or control modes in the art unless otherwise specified.
Finally, it is noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and that other modifications and equivalents thereof by those skilled in the art should be included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (10)
1. An electric heating fan blade distributed time sequence electric heating control system, which is characterized by comprising: a blade temperature sensor, a heating element, a control unit and a time sequence controller which are arranged on the electric heating fan;
The electric heating fans are divided into a plurality of groups according to positions, each group of electric heating fans consists of a plurality of blades, and each blade corresponds to at least one blade temperature sensor, at least one heating element and at least one control unit; the input end of the time schedule controller is connected with a plurality of blade temperature sensors, the output end of the time schedule controller is respectively connected with a plurality of control units, and each control unit is controlled to be connected with one heating element to form a distributed heating element;
The temperature condition of the blade surface is monitored by a blade temperature sensor on any blade and is fed back to a time sequence controller, and the time sequence controller adopts a time sequence control method to control a control unit on the blade to start or close a corresponding heating element and is used for carrying out distributed time sequence electric heating control on the electric heating fan blade.
2. The distributed time series electric heating control system of electric heating fan blades of claim 1, further comprising a tower base controller disposed on the electric heating fan, the tower base controller controlling the time series controller.
3. The distributed time-series electric heating control system for electric heating fan blades as recited in claim 2, further comprising an icing detector and a wind farm deicing control computer; the icing detector detects the icing condition of each electric heating fan, and the wind farm deicing control computer 19 controls the tower foundation controller according to the icing condition.
4. A distributed time series electric heating control system for electric heating fan blades as claimed in any of claims 1 to 3 wherein the control unit is a power controller.
5. The distributed time-series electric heating control system for the blades of the electric heating fan according to claim 4, wherein the heating element is an electric heating film, and the power controller is controlled by a power lightning protection box to be connected with the electric heating film.
6. The distributed timing electrical heating control system of an electrical heating fan blade of claim 5, wherein the electrical heating film comprises a PS electrical heating film and an SS electrical heating film.
7. The distributed time-series electric heating control system for the blades of the electric heating fan as set forth in claim 4, wherein the heating element is a pneumatic heating device, and the power controller is in control connection with the pneumatic heating device.
8. The distributed time sequence electric heating control method for the blades of the electric heating fan is characterized by comprising the following steps of:
Dividing the blades of the electric heating fan into a plurality of groups according to the positions of the blades; setting a corresponding heating controller for each group of blades, wherein the controller comprises a time sequence controller and a power controller;
The time sequence controller distributes heating time and power one by one according to the working state and the demand condition of the blade, controls the switching time and the switching period of the power controller, and transmits specific heating instructions to the corresponding distributed heating elements through control signals for time sequence control of the electric heater;
the power controller controls the current level of the heating element for controlling the power of the heating element.
9. The method for distributed time-series electric heating control of an electric heating fan blade of claim 8, further comprising, prior to operation of the time series controller:
The deicing detector detects the icing condition of the blades of the electric heating fan, if the blades of the electric heating fan are iced, the deicing system is started, otherwise, the deicing system stands by;
And (3) self-checking the deicing system, judging whether the system is normal, if so, starting the heating system to operate, and if so, waiting.
10. The distributed time-series electric heating control method for the electric heating fan blade according to claim 8, wherein in the control process of the time-series controller, the method further comprises:
When the heating operation is performed, the temperature sensor transmits the surface temperature of the blade to the control computer, and the control computer judges whether to adjust parameters to continue heating or not according to the heating temperature time, or the deicing is finished and heating is stopped.
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