CN112112760A - Control system of wind power plant - Google Patents
Control system of wind power plant Download PDFInfo
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- CN112112760A CN112112760A CN202010857483.2A CN202010857483A CN112112760A CN 112112760 A CN112112760 A CN 112112760A CN 202010857483 A CN202010857483 A CN 202010857483A CN 112112760 A CN112112760 A CN 112112760A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/048—Automatic control; Regulation by means of an electrical or electronic controller controlling wind farms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A control system for a wind farm, comprising: the wind power plant energy control system determines a plurality of working units and a plurality of standby units according to the total power limit value of the wind power plant and the minimum power generation power value of a single wind power unit; when the temperature of any working unit in the plurality of working units exceeds the standard, closing the working unit with the exceeding temperature, and selecting one standby unit from the plurality of standby units to replace the working unit with the exceeding temperature; when the last standby unit is selected, the concentrated heat exchange system of the wind power plant is controlled to be in a low-energy-consumption working mode, and if the temperature of the last selected standby unit or any current working unit exceeds the standard, the concentrated heat exchange system of the wind power plant is controlled to be switched to a high-energy-consumption working mode; the concentrated heat exchange system for the wind power plant switches the working mode between a low energy consumption working mode and a high energy consumption working mode to exchange heat for the working unit with the temperature exceeding the standard.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a control system of a wind power plant.
Background
The wind generating set is a device for converting wind energy in nature into electric energy, and the corresponding electric energy belongs to green clean energy. Along with the increasing of the unit capacity of the wind generating set, the heat loss of each subsystem and component of the unit is increasing day by day, and according to incomplete statistics, the heat loss of the unit almost accounts for about 8% -10% of the unit capacity, for example: for a unit with 10MW of single machine capacity, the heat loss value of the unit is as high as nearly 1MW, so that the heat loss value is considerable. The problem that huge heat loss directly brought is exactly the heat dissipation problem, how to radiate the unit self high-efficiently, fast, for the unit builds comfortable, good operational environment, becomes the key technical problem that needs to solve in the present wind power industry urgently.
Due to rapid maturation of a wind power market in recent years, the amount of wind power installations is greatly increased, and the problem of severe wind abandoning and electricity limiting is caused under the limiting conditions of regional absorption, grid-connected transmission and the like, so that the unit can not run at full load in most regions under the wind condition.
The existing temperature control cooling device is usually a set of temperature control system integrated with a generator, so that the cost is high and the energy consumption is high.
Disclosure of Invention
The invention aims to provide a control system of a wind power plant, which is used for reducing the energy consumption of centralized heat exchange control of a plurality of wind generation sets in the wind power plant.
In order to achieve the purpose, the invention provides the following technical scheme:
a control system for a wind farm, comprising: the system comprises a plurality of wind turbine generators, a wind power plant centralized heat exchange system and a wind electric field energy control system;
the wind power plant energy control system is in communication connection with the plurality of wind power generation sets and is used for determining a plurality of working units and a plurality of standby units according to a total power limit value of the wind power plant and the minimum power generation power value of a single wind power generation set; when the temperature of any working unit in the plurality of working units exceeds the standard, closing the working unit with the exceeding temperature, and selecting one standby unit from the plurality of standby units to replace the working unit with the exceeding temperature; when the last standby unit is selected, the concentrated heat exchange system of the wind power plant is controlled to be started, the concentrated heat exchange system of the wind power plant is controlled to be in a low-energy-consumption working mode, and if the temperature of the last selected standby unit or any current working unit exceeds the standard, the concentrated heat exchange system of the wind power plant is controlled to be switched to a high-energy-consumption working mode;
the wind power plant centralized heat exchange system is in communication connection with the wind power plant energy control system, is communicated with the plurality of wind power generation sets through a circulating pipeline, and is used for switching the working mode between the low energy consumption working mode and the high energy consumption working mode according to a control signal of the wind power plant energy control system to exchange heat for the working set with the exceeding temperature.
In some embodiments, the wind turbine includes: the temperature self-learning controller comprises a plurality of heating components, a plurality of temperature detection devices correspondingly arranged on the heating components, a main controller and a temperature self-learning controller;
the temperature detection devices are used for detecting a plurality of real-time test temperature values of a plurality of heating components contained in the wind turbine generator;
the main controller is used for acquiring the generating power and generating time of the wind turbine;
the temperature self-learning controller is used for determining the heat exchange quantity required by the wind turbine generator according to the generated power and the generated time of the wind turbine generator and feeding back the heat exchange quantity required by the wind turbine generator to the wind power plant energy control system; determining whether the temperature of the wind power generation set exceeds the standard or not according to the real-time test temperature values and the target set temperature thresholds, and reporting the temperature to the wind power plant energy control system;
the wind power plant energy control system is further used for determining the total heat exchange quantity according to the heat exchange quantity fed back by the plurality of temperature self-learning controllers, and determining that the wind power plant concentrated heat exchange system works in a low-energy-consumption working mode or a high-energy-consumption working mode according to the total heat exchange quantity.
In some embodiments, the wind farm centralized heat exchange system comprises:
the system comprises a soil or water, a coil pipe, a field group environment heat exchanger, an expansion valve, a compressor, a main circulation path valve body, a main circulation bypass valve body, a centralized cooling equipment room, a pump body, a plurality of branch loop valve bodies and a centralized heat exchange system controller;
the compressor, the field group environment heat exchanger and the expansion valve are communicated in sequence through an internal circulation pipeline, the bottom of the field group environment heat exchanger is provided with a coil pipe, the coil pipe is communicated with the field group environment heat exchanger, the coil pipe is arranged in a soil layer or water,
the centralized cooling equipment room is used for accommodating the field group environment heat exchanger, the expansion valve, the compressor and the centralized heat exchange system controller;
the centralized heat exchange system controller is electrically connected with the expansion valve, the compressor, the main circulation path valve body, the main circulation bypass valve body, the pump body and the branch loop valve bodies and is used for controlling the wind power plant centralized heat exchange system to switch the working mode between a low energy consumption working mode and a high energy consumption working mode; in the low-energy-consumption working mode, only the pump body is started, the branch loop valve bodies are started, and the main circulation bypass valve body is controlled to isolate the internal circulation pipeline from the external circulation pipeline; and in the high-energy-consumption mode, the internal circulation pipeline is communicated with the external circulation pipeline, and the opening of the compressor and the expansion valve is controlled.
In some embodiments, the coil comprises a plurality of heat exchange pipes connected in series in sequence, the heat exchange pipes are made of copper or aluminum, fins are uniformly arranged on the outer walls of the heat exchange pipes, and the heat exchange pipes and the fins are integrally formed.
In some embodiments, the centralized heat exchange system controller is further configured to control the opening degree of the main circulation bypass valve body and the circulation flow rate of the power pump according to the total heat exchange amount.
In some embodiments, the controller of the centralized heat exchange system is further configured to control opening, closing, and opening of the valve body of the corresponding branch circuit according to a heat exchange amount required by each wind turbine.
In some embodiments, the wind turbine further comprises a plurality of stand-alone heat exchangers disposed in an area where any of the plurality of heat source components are located: the system comprises a pitch cabinet, a cabin cabinet, a generator, a gear box, an electric control cabinet, a converter cabinet and a cable laying area in a tower barrel.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
1) the wind driven generator bodies can be cooled at one time in a combined mode, so that the wind driven generator bodies can be conveniently and intensively controlled when in use;
2) the external heat dissipation device is convenient for overhauling the outside;
3) the minimization of the energy consumption of the unit can be further realized by combining with the field cluster control, and the energy conservation of the whole field is realized; meanwhile, the reliability of the operation of the single machine and the whole plant unit equipment can be improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a control system of a wind farm in an embodiment of the invention;
FIG. 3 is a schematic diagram of a temperature control based field level power control system according to an embodiment of the present invention;
FIG. 4 is a flow chart of the operational principle of the wind farm control system of an embodiment of the present invention.
The reference numbers illustrate:
1-a first wind generating set; 2-a second wind generating set; 3-a third wind generating set; 4-Nth wind generating set; 5-a first line; 6-a second line; 7-a third line; 8-nth line; 9-a power grid;
10-internal heat exchangers of the unit 1; 11-internal heat exchangers of the unit 2; 12-internal heat exchangers of the unit N;
13-a compressor; 14-a field group ambient heat exchanger; 15-an expansion valve; 16-a centralized heat exchange equipment room; 17-soil layer or water; 18-a coil; 19-main circulation path valve body; 20-a main circulation bypass valve body; 21-a pump body; 22-circuit 1 valve body; 23-circuit 2 valve body; 24-circuit N valve body; 25-a controller of the centralized heat exchange system; 26-wind field central control room; 27-a wind farm energy management system; 28-main communication line; 29-nth communication line; 30-2 nd communication line; 31-1 st communication line.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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 is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The wind electric field areas such as plains, gobi, intertidal zones and the like have the characteristics of balanced terrain and more concentrated fan installation, and the heat exchange of unit single machine and field group level can be carried out by utilizing resources such as soil, lakes, seawater and the like; based on the above, the minimization of the energy consumption of the unit can be further realized by combining with the field cluster control, and the energy conservation of the whole field is realized; meanwhile, the reliability of the operation of the single machine and the whole plant unit equipment can be improved.
FIG. 1 is a wind farm fan grid-connection schematic diagram according to an embodiment of the invention. As shown in fig. 1, the wind generating set absorbs wind energy, converts mechanical energy of the impeller into electric energy, processes the electric energy through the converter, and transmits the electric energy meeting the grid-connection condition to the power grid. As an example, fig. 1 shows that the generated electric energy of each unit of the corresponding units 1, 2, 3, 4 in the wind farm is correspondingly transmitted to the power grid 9 through the line 5, the line 6, the line 7, the line 8. The number of the units and the lines is not limited to 4, and may be N, where N is a positive integer greater than or equal to 2.
FIG. 2 is a schematic diagram of a control system of a wind farm in an embodiment of the invention. As shown in fig. 2, the control system of the wind farm includes:
the centralized heat exchange system of the wind generating sets 1, 2 and 3 … N, and a single heat exchange system, a wind farm central control room 26, a wind farm energy management system 27, a communication main line 28, an Nth communication line 29, a 2 nd communication line 30 and a 1 st communication line 31 are arranged in each wind generating set.
Concentrated heat transfer system includes: soil or water 17, a coil pipe 18, a field group-environment heat exchanger 14, an expansion valve 15, a compressor 13, a main circulation path valve body 19, a main circulation bypass valve body 20, a centralized cooling equipment room 16, a pump body 21, a loop 1 valve body 22, a loop 2 valve body 23, a loop N valve body 24 and a centralized heat exchange system controller 25.
The inside stand-alone heat transfer system of unit includes: the heat exchanger 10 in the unit 1, the heat exchanger 11 in the unit 2 and the heat exchanger 12 in the unit N.
The wind farm energy management system 27 is responsible for scheduling energy of the wind farm, that is, controlling real-time power of a plurality of wind generating sets 1, 2, 3 … N in the wind farm, and adjusting corresponding real-time power and controlling the centralized heat exchange system according to real-time temperature feedback of the plurality of wind generating sets 1, 2, 3 … N.
Specifically, for real-time power adjustment, a wind farm energy management system 27 in a wind farm central control room 26 sends out a control signal, and the control signal is interacted with a master control system PLC of a wind generating set corresponding to a wind turbine generator 1, 2, 3 … N through a communication main line 28, an nth communication line 29, a 2 nd communication line 30 and a 1 st communication line 31.
For the control of the centralized heat exchange system, the centralized heat exchange system receives the requirement of the wind power plant and/or the single heat exchange quantity of the wind power plant energy management system 27, and acts to control and adjust the operation state and flow rate of the pump body 21 in the circulating pipeline of the centralized heat exchange system, and the opening/closing state and the opening degree of the valve body 22 of the loop 1, the valve body 23 of the loop 2 and the valve body 24 of the loop N.
For the centralized heat exchange system, the compressor 13, the field group-environment heat exchanger 14 and the expansion valve 15 are connected in series, and heat exchange (cooling and heating) between the internal heat exchange system of each wind generating set and the soil or water of the ground is realized through the circulating medium in the coil 18.
The field group-environment heat exchanger 14 is a carrier for realizing heat exchange between heat inside the fan and the environment (soil, water, etc.), and the heat exchange system inside the unit comprises: the heat exchanger 10 in the unit 1, the heat exchanger 11 in the unit 2 and the heat exchanger 12 in the unit N are carriers for realizing energy exchange between the heat in the unit and the external heat, and the energy exchange between the group-environment heat exchanger 14 and the heat exchange system in the unit is realized in real time through a circulating pipeline of a concentrated heat exchange system, a power source pump body 21, an expansion valve 15 and a compressor 13, so that the heat exchange between the unit and the external environment is realized. The customized heat exchange requirements of the unit can be realized through the opening states and the opening degrees of the loop 1 valve body 22, the loop 2 valve body 23 and the loop N valve body 24; the optimal control of the overall heat exchange quantity of the centralized heat exchange system is realized by controlling different flow control of the pump body 21; the optimization of the centralized heat exchange system due to different power output modes of the wind power plant energy management system 27 is realized through the main circulation bypass valve body 20.
Further, a huge heat exchange circulation pipeline is arranged between different wind generating sets and between the wind power plant concentrated heat exchange systems, on the premise that the power of the wind generating sets is not high and the heating value is not large, the concentrated heat exchange system controller 25 can close the compressor 13, the expansion valve 15 and other energy consumption devices, synchronously open the main circulation bypass three-way valve 20 and open the pump body 21, and the reduction of heat exchange energy consumption is realized through the heat sink function of the circulation medium of the huge heat exchange circulation pipeline.
Furthermore, different cooling forms of different wind generating sets can be met, such as air-cooled wind generating sets or liquid-cooled wind generating sets, and different heat exchanger type ends, such as air-liquid heat exchangers and liquid-liquid heat exchangers, are matched with corresponding ends.
Furthermore, in order to meet the temperature control requirements of different regions in different spaces of different wind generating sets, different types of heat exchangers can be configured in a target control region, booster pumps and the like are correspondingly added, and connection is realized through circulating pipelines, so that the control of the temperatures corresponding to different regions and different types of heat exchange modes of different wind generating sets is realized. The target control area refers to different areas in the wind generating set which need heat exchange treatment, such as the area where the main heat source is located, including but not limited to the area with heat generating equipment such as a generator, a converter, a pitch device, a cabin, a tower (with cables) and the like.
Further, the wind farm concentrated heat exchange system can realize a cooling mode and a heating mode on the premise of ensuring that the hardware configuration is unchanged, and at the moment, only the circulation direction of the expansion valve 15 needs to be changed. In principle, the cooling mode and the heating mode both follow the second law of thermodynamics, and heat is absorbed from low temperature and released to high temperature on the premise of consuming certain electric energy.
Furthermore, soil or water is arranged on one side of the heat exchange cycle of the wind power plant concentrated heat exchange system, the soil is a large heat sink, and the temperature of the soil is at least 1-2 ℃ lower or higher than the temperature of the external environment no matter in summer or winter, so that the wind power plant concentrated heat exchange system can obtain better heat exchange effect and higher heat efficiency than the traditional air-cooled and liquid-cooled heat exchange devices.
Furthermore, the centralized heat exchange system of the wind power plant is positioned at the wind power plant level, the heat exchange systems of a plurality of wind generating sets are integrated, and the energy utilization rate is improved, because different wind generating sets have different output scenes in most application scenes, the different heat exchange characteristics are correspondingly realized, and different total heat exchange amounts are matched with the input frequencies of different compressors 13, so that the energy conservation is realized; meanwhile, compared with a single discrete heat dissipation system, the wind power plant level centralized heat exchange system can greatly reduce the investment cost from the equipment investment angle.
Furthermore, the wind power plant concentrated heat exchange system realizes a closed heat exchange circulation mode of the wind generating set, and external factors such as sand and dust, relative humidity and the like do not need to be considered in cooling/heating on the premise of ensuring the sealing of the wind generating set.
Furthermore, the wind power plant concentrated heat exchange system realizes a closed heat exchange circulation mode of the wind generating set, and all hardware related to the air cooling system and the liquid cooling system are positioned in the wind generating set, so that the external arrangement of a radiating fan unit in the traditional air cooling mode and the liquid cooling mode is avoided, and the noise pollution of the radiating system of the wind generating set to the surrounding environment is avoided.
Fig. 3 is a schematic diagram of a field level power control system based on temperature control according to an embodiment of the present invention. As shown in fig. 3, corresponding to the wind abandoning and power limiting scenario, the wind farm energy management system may obtain the corresponding required total generated electricity and the total power value P from the provincial energy management system, and the wind farm energy management system may implement power generation control and allocation of a wind turbine generator set (hereinafter referred to as a set) in the wind farm, so as to achieve the limited power index.
According to the total power P of the energy management system of the wind power plant, energy can be distributed by combining the number of the units in the wind power plant and assuming that M units are positive integers. For example, according to the average distribution principle, each unit needs to generate P/M, but in order to take the generating efficiency of the units into consideration, the minimum generating power number of a single unit needs to be limited, and is assumed to be an A value, for example, A is more than or equal to 500 KW; under the condition, under a certain total P, in some scenes, not all the units of the wind power plant need to be in a power generation state, and some units can be in a standby state; assume that the number of units in the power generation state is B, and the number of units in the standby state is M-B.
The number of the units in the power generation state is B, temperature rise (in a cooling mode or a heating mode) of each subsystem and component in the unit needs a process, temperature values of each subsystem and component of the unit which just starts to operate are at relatively low levels, and the requirement on heat exchange quantity is not very high, so that based on the mode, a centralized heat exchange system of a wind power plant can be closed, and heat exchange of the unit is realized only by means of energy storage capacity of a circulating medium corresponding to a huge heat exchange circulating pipeline.
Further, when the temperature of any subsystem and component of any unit in the B units in the power generation state approaches the temperature control threshold, the switching of the running units can be performed through the wind farm energy management system, that is, the M-B units in the standby state are turned on, the B units in the running state are turned off, and the temperature rise of each subsystem and component of the M-B units in the standby state also needs a process, and the process does not need to turn on the wind farm centralized heat exchange system, or start the pump body 21 of the centralized heat exchange system and the main circulation bypass valve body 20.
Further, when the temperature of each subsystem or heating component inside the M-B units in the running state approaches the temperature control threshold, the running units can be switched by the wind farm energy management system, that is, the B units in the standby state are turned on, the M-B units in the running state are turned off, the wind farm centralized heat exchange system is turned on, and the opening degree of the main circulation bypass valve body 20 and the circulation flow rate of the power pump 21 can be controlled according to the total heat exchange amount.
As an alternative embodiment, when the temperature of any working unit in the plurality of working units exceeds the standard, the working unit with the exceeding temperature is closed, and one standby unit is selected from the plurality of standby units to replace the working unit with the exceeding temperature; when the last standby unit is selected, the concentrated heat exchange system of the wind power plant is controlled to be started, the concentrated heat exchange system of the wind power plant is controlled to be in a low-energy-consumption working mode, and if the temperature of the last selected standby unit or any current working unit exceeds the standard, the concentrated heat exchange system of the wind power plant is controlled to be switched to a high-energy-consumption working mode; the wind power plant concentrated heat exchange system is in communication connection with the wind power plant energy control system, is communicated with the plurality of wind power generation sets through a circulating pipeline, and is used for switching the working mode between the low energy consumption working mode and the high energy consumption working mode according to a control signal of the wind power plant energy control system to exchange heat for the working set with the temperature exceeding the standard. In the low-energy-consumption working mode, only the pump body is started, the branch loop valve bodies are started, and the main circulation bypass valve body is controlled to isolate the internal circulation pipeline from the external circulation pipeline; and in the high-energy-consumption mode, the internal circulation pipeline is communicated with the external circulation pipeline, and the opening of the compressor and the expansion valve is controlled.
Furthermore, each unit is provided with a temperature self-learning controller, and the temperature self-learning controller can calculate the heat exchange amount required by the unit according to the power, the running time (power generation time), the target temperature value of the heating part and the measured temperature value of the heating part of the unit, so that the distribution of different loop flows (realized through the opening of valve bodies of the loops) is realized, and the differential control of different units is realized. A plurality of heating components such as a generator, a converter, a cable, a control cabinet and the like are arranged in the wind turbine generator, and the temperature self-learning controller establishes a corresponding temperature calculation model for each heating component. The process of building or training a temperature calculation model for each heat-generating component includes: the method comprises the steps of collecting the self generated power and the generating time of the wind turbine generator and a plurality of actually measured temperature values of the heating part during the generating power and the generating time, inputting historical data corresponding to the three into a temperature self-learning controller for training, and obtaining a temperature calculation model corresponding to the heating part. The temperature calculation model may be a machine learning algorithm model, for example, the establishment of the model may be implemented by various existing neural network algorithms, or by using a Support Vector Machine (SVM) algorithm), and the temperature calculation model represents a corresponding relationship between the operating power and the operating time of the wind turbine generator and the temperature value of the corresponding heat generating component. According to the temperature calculation model, the input generating power and generating time of the unit can output the corresponding temperature value of the heating component. According to the output temperature value of the heating component and a target temperature value (threshold value) preset by the heating component, the heat exchange quantity required by the heating component can be determined. And so on, summing or weighting and summing the heat exchange quantity required by all the heat generating components to obtain the total heat exchange quantity required by the wind turbine generator to which the heat generating components belong as the first total heat exchange quantity.
In another scheme, the total heat exchange amount required by the unit can be directly calculated according to all the target temperature values of the heating components and the actually measured temperature values of the heating components, and the total heat exchange amount is recorded as a second total heat exchange amount.
And then, mutually checking and verifying the first total heat exchange quantity and the second total heat exchange quantity, judging whether a sensor in a temperature detection system of the wind turbine generator fails, and/or judging whether the precision of the temperature calculation model is normal. When the error of the two is within a reasonable set range, judging that a sensor of a temperature detection system of the wind turbine generator is normal and has no fault; and/or the accuracy of the temperature calculation model is normal. Otherwise, judging that the sensor has suspected faults, and recommending maintenance and inspection; and/or the error of the temperature calculation model is too large, and the learning training needs to be carried out again. Further, when the errors of the first total heat exchange quantity and the second total heat exchange quantity are not consistent within a reasonable setting range, the first total heat exchange quantity and the second total heat exchange quantity are subjected to weighted summation to obtain the final heat exchange quantity required by the wind turbine generator, so that the calculation accuracy is improved, and the measurement error or the model precision error of the temperature detection system is avoided.
The calculation of the temperature self-learning controller is based on target temperatures set by each subsystem and component of the unit when the subsystems and the components leave a factory, meanwhile, temperature measurement values corresponding to each subsystem and component need to be fed back to the temperature self-learning controller in real time, the temperature self-learning controller can conduct real-time prediction of the temperature by combining the temperature self-learning controller and a calculation formula or a model, the real-time prediction is used for sensing the temperature level inside the unit and then feeding back the temperature level to the wind power plant energy management system, and therefore the centralized heat exchange system can conduct temperature control (such as valve body opening degree, pump output power and the like.
FIG. 4 is a flow chart of the operational principle of the wind farm control system of an embodiment of the present invention. As shown in fig. 4, the temperature self-learning controller of the unit may feed back a signal for indicating the amount of heat exchange required by the unit to the wind farm energy management system 27, so that the power scheduling of the wind farm is based, and at the same time, the lowest field-level heat exchange energy consumption is achieved, and it is ensured that each unit subsystem and component are in the most comfortable temperature environment, thereby improving the reliability of the component. The temperature self-learning controller sends the real-time temperature values of the heating components of the wind turbine generator to the wind farm energy management system 27, and the wind farm energy management system 27 judges whether the temperatures of the heating components exceed the standard or approach the temperature exceeding standard (risk) according to the received real-time temperature values of the heating components and the temperature control threshold corresponding to each heating component. The temperature control threshold may generally be set below a maximum allowable operating temperature of the heat generating component. And when the temperature of any heating component exceeds the standard, the wind turbine is turned off, one standby unit is selected from the standby units to replace the working unit with the exceeding temperature, and the generated power of the selected turned-on wind turbine is controlled and adjusted. The wind farm energy management system 27 is further configured to obtain a total required heat exchange amount after receiving the required heat exchange amount reported by the temperature self-learning controllers of the plurality of wind turbines, and send the total required heat exchange amount, the identifiers of the plurality of wind turbines, and the required heat exchange amount of the single turbine corresponding to the identifiers of the plurality of wind turbines one to the wind farm centralized heat exchange system 25 together, so as to realize differentiated flow control by controlling the corresponding branch loop valve bodies and the pump bodies.
Further, the temperature self-learning controller of the unit can feed back a signal for indicating the heat exchange amount required by the unit to the wind power plant concentrated heat exchange system, so that the opening, closing and opening control of the main circulation bypass valve body 20 of the wind power plant concentrated heat exchange system is realized; opening and closing of the pump body 21 and different flow control; the heat exchange quantity required by each unit corresponds to the opening, closing and opening control of the loop valve bodies 22, 23 and 24 …; therefore, differentiation and economical control of the single machine are realized, and optimal control of the whole field is further realized.
On the premise of ensuring that the hardware configuration is unchanged, the cooling mode and the heating mode are realized, and at the moment, only the flow direction of the expansion valve needs to be changed; in principle, the cooling mode and the heating mode both follow the second law of thermodynamics, and heat is absorbed from low temperature and released to high temperature on the premise of consuming certain electric energy.
The liquid-cooled wind generating set and the temperature control device have the advantages that the ground soil is arranged on one heat exchange circulation side, the soil is a large heat sink, and the temperature of the soil is at least 1-2 ℃ lower or higher than the temperature of the external environment no matter in summer or winter, so that the temperature control device and the system can obtain better heat exchange effect and higher heat efficiency compared with the traditional air-cooled heat exchange device.
The liquid-cooled wind generating set and the temperature control device realize a closed heat exchange circulation mode of the wind generating set, and the liquid-cooled temperature control system (cooling/heating) does not need to consider external factors such as sand dust and relative humidity on the premise of ensuring the sealing of the set.
Just because liquid cooling wind generating set and temperature control device have realized wind generating set closed heat transfer circulation mode, all hardware relevant with the liquid cooling system all are in the unit inside to avoided traditional air cooling, liquid cooling mode radiator fan unit external, thereby avoided the noise pollution that unit cooling system brought the surrounding environment.
A plurality of heat sources, namely components needing cooling, exist in different space positions inside the wind generating set, such as a pitch cabinet, a generator, a gearbox, a cable, a current transformer, a cabin and the like. Different heat-generating components have different heat exchange types corresponding to heat exchange ends, so that different types of heat exchangers are correspondingly needed, such as a variable pitch cabinet, a cable, a cabin and the like, for heat exchange through air circulation, and a liquid-air type heat exchanger is needed. For example, the inside of components such as a generator in an air-liquid heat exchange or liquid-liquid heat exchange mode, a converter in a liquid-liquid heat exchange mode and the like exchange heat through liquid, so that the components need to correspond to a liquid-liquid type heat exchanger; through configuring the liquid-air heat exchanger and the air-air heat exchanger at different spatial positions, heat can be absorbed from heat source components such as a variable-pitch cabinet body, a generator and the like at the tail end of the corresponding heat exchanger in a cooling mode, liquid on the other side of the heat exchanger is heated, high-temperature liquid is compressed by the compressor, and heat release on low-temperature environment soil is achieved through the liquid-liquid heat exchanger.
Considering different heat transfer amounts of the heat generating components, the spatial positions of the different heat generating components and the heat transfer end types of the different heat generating components, and considering the temperature consistency of the end temperatures of the different heat exchangers, different combination modes are adopted for heat transfer, and the following principle is as follows: the heat exchangers can adopt a series connection mode when the distances among different parts are close, the heat exchange modes are consistent and the heat exchange quantity is less; the heat exchangers are connected in parallel when the distances among different components are long, the heat exchange amount of a single component is large, and the heat exchange modes and types are different.
Different parts have different requirements for heating modes because the unit is in a low-temperature environment such as winter or a severe cold area, and the service life and reliability of the parts and original parts are facilitated by a certain temperature such as 25 ℃. At the moment, the soil side of the ground is in a high-temperature environment, heat is absorbed from the soil through the liquid-liquid heat exchanger, and high-temperature liquid can be transferred to different space areas of the low-temperature unit through the liquid-air heat exchanger through the compressor and the expansion valve; therefore, the temperature in different space areas is improved to a certain extent, and the integral uniformity of the space temperature in different areas of the unit is realized.
Considering different heat transfer amounts of the heat generating components, the spatial positions of the different heat generating components and the heat transfer end types of the different heat generating components, and considering the temperature consistency of the end temperatures of the different heat exchangers, different combination modes are adopted for heat transfer, and the following principle is as follows: the heat exchangers can adopt a series connection mode when the distances among different parts are close, the heat exchange modes are consistent and the heat exchange quantity is less; the heat exchangers are connected in parallel when the distances among different components are long, the heat exchange amount of a single component is large, and the heat exchange modes and types are different.
While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A control system for a wind farm, comprising: the system comprises a plurality of wind turbine generators, a wind power plant centralized heat exchange system and a wind electric field energy control system;
the wind power plant energy control system is in communication connection with the plurality of wind power generation sets and is used for determining a plurality of working units and a plurality of standby units according to a total power limit value of the wind power plant and the minimum power generation power value of a single wind power generation set; when the temperature of any working unit in the plurality of working units exceeds the standard, closing the working unit with the exceeding temperature, and selecting one standby unit from the plurality of standby units to replace the working unit with the exceeding temperature; when the last standby unit is selected, the concentrated heat exchange system of the wind power plant is controlled to be started, the concentrated heat exchange system of the wind power plant is controlled to be in a low-energy-consumption working mode, and if the temperature of the last selected standby unit or any current working unit exceeds the standard, the concentrated heat exchange system of the wind power plant is controlled to be switched to a high-energy-consumption working mode;
the wind power plant centralized heat exchange system is in communication connection with the wind power plant energy control system, is communicated with the plurality of wind power generation sets through a circulating pipeline, and is used for switching the working mode between the low energy consumption working mode and the high energy consumption working mode according to a control signal of the wind power plant energy control system to exchange heat for the working set with the exceeding temperature.
2. Control system of a wind park according to claim 1, wherein said wind park comprises: the temperature self-learning controller comprises a plurality of heating components, a plurality of temperature detection devices correspondingly arranged on the heating components, a main controller and a temperature self-learning controller;
the temperature detection devices are used for detecting a plurality of real-time test temperature values of a plurality of heating components contained in the wind turbine generator;
the main controller is used for acquiring the generating power and generating time of the wind turbine;
the temperature self-learning controller is used for determining the heat exchange quantity required by the wind turbine generator according to the generated power and the generated time of the wind turbine generator and feeding back the heat exchange quantity required by the wind turbine generator to the wind power plant energy control system; determining whether the temperature of the wind power generation set exceeds the standard or not according to the real-time test temperature values and the target set temperature thresholds, and reporting the temperature to the wind power plant energy control system;
the wind power plant energy control system is further used for determining the total heat exchange quantity according to the heat exchange quantity fed back by the plurality of temperature self-learning controllers, and determining that the wind power plant concentrated heat exchange system works in a low-energy-consumption working mode or a high-energy-consumption working mode according to the total heat exchange quantity.
3. Control system of a wind farm according to claim 1 or 2, characterized in that said wind farm central heat exchange system comprises:
the system comprises a soil or water, a coil pipe, a field group environment heat exchanger, an expansion valve, a compressor, a main circulation path valve body, a main circulation bypass valve body, a centralized cooling equipment room, a pump body, a plurality of branch loop valve bodies and a centralized heat exchange system controller;
the compressor, the field group environment heat exchanger and the expansion valve are communicated in sequence through an internal circulation pipeline, the bottom of the field group environment heat exchanger is provided with a coil pipe, the coil pipe is communicated with the field group environment heat exchanger, the coil pipe is arranged in a soil layer or water,
the centralized cooling equipment room is used for accommodating the field group environment heat exchanger, the expansion valve, the compressor and the centralized heat exchange system controller;
the centralized heat exchange system controller is electrically connected with the expansion valve, the compressor, the main circulation path valve body, the main circulation bypass valve body, the pump body and the branch loop valve bodies and is used for controlling the wind power plant centralized heat exchange system to switch the working mode between a low energy consumption working mode and a high energy consumption working mode; in the low-energy-consumption working mode, only the pump body is started, the branch loop valve bodies are started, and the main circulation bypass valve body is controlled to isolate the internal circulation pipeline from the external circulation pipeline; and under the high-energy-consumption mode, the communication of the internal circulation pipeline and the external circulation pipeline is controlled, and the opening of the compressor and the expansion valve is controlled.
4. The control system of the wind farm according to claim 3, wherein the coil comprises a plurality of heat exchange pipes which are sequentially connected in series, the heat exchange pipes are made of copper or aluminum, fins are uniformly arranged on the outer walls of the heat exchange pipes, and the heat exchange pipes and the fins are integrally formed.
5. The control system of the wind farm according to claim 3, wherein the centralized heat exchange system controller is further configured to control the opening of the main loop bypass valve body and the circulation flow of the power pump according to the total heat exchange amount.
6. The control system of the wind farm according to claim 3, wherein the centralized heat exchange system controller is further configured to control opening, closing, and opening of the corresponding branch circuit valve body according to a heat exchange amount required by each wind turbine.
7. The control system for a wind farm according to claim 1, wherein the wind turbine further comprises a plurality of single heat exchangers disposed in the area where any of the plurality of heat source components: the system comprises a pitch cabinet, a cabin cabinet, a generator, a gear box, an electric control cabinet, a converter cabinet and a cable laying area in a tower barrel.
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| CN202010857483.2A CN112112760A (en) | 2020-08-24 | 2020-08-24 | Control system of wind power plant |
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| CN202010857483.2A CN112112760A (en) | 2020-08-24 | 2020-08-24 | Control system of wind power plant |
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| CN113530771A (en) * | 2021-08-30 | 2021-10-22 | 上海凯士比泵有限公司 | Wind generating set external circulating cooling system utilizing underground water source |
| CN113550872A (en) * | 2021-09-22 | 2021-10-26 | 深圳市特发信息数据科技有限公司 | Energy consumption monitoring system of wind power data center |
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| CN108397349A (en) * | 2018-04-08 | 2018-08-14 | 上海电气风电集团有限公司 | A kind of wind power plant low temperature standby controlling method |
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| CN113530771A (en) * | 2021-08-30 | 2021-10-22 | 上海凯士比泵有限公司 | Wind generating set external circulating cooling system utilizing underground water source |
| CN113550872A (en) * | 2021-09-22 | 2021-10-26 | 深圳市特发信息数据科技有限公司 | Energy consumption monitoring system of wind power data center |
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