CN113270892A - Wind turbine generator set, control method and device thereof, electronic equipment and storage medium - Google Patents
Wind turbine generator set, control method and device thereof, electronic equipment and storage medium Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 9
- 238000012163 sequencing technique Methods 0.000 claims description 6
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- 230000001276 controlling effect Effects 0.000 description 8
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y02E10/76—Power conversion electric or electronic aspects
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- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a wind turbine generator set, a control method and device thereof, electronic equipment and a storage medium. The control method comprises the following steps: determining the operation data of the wind turbine generator; according to rated parameters of each conversion module, determining a target conversion module matched with the operation data and target operation data thereof from the plurality of conversion modules; and controlling the target current transformation module to operate according to the target operation data and put into operation. Therefore, under the condition that the conversion efficiency of the electric energy is higher or highest, the converter module which is put into operation can be ensured to operate at rated power or close to the rated power, the overall operation efficiency of the converter can be improved, and the economic optimization is realized.
Description
Technical Field
The invention relates to the technical field of wind turbines, in particular to a wind turbine, a control method and device thereof, electronic equipment and a storage medium.
Background
With the steady and rapid development of the domestic wind power generation technology, the gradual deepening of the wind resource development and the requirements on energy conservation and environmental protection in the wind resource development, the market demands on large-blade and large-capacity wind turbine units are more and more urgent, and the larger the unit capacity is, the higher the capacity demand on the converter is.
The converter is the device of the electric energy conversion of wind turbine generator system, and is highest at rated power point efficiency, and the loss value is also great, and nevertheless in the operation of wind turbine generator system, operating power constantly changes, and is not the same at full power section efficiency, consequently in wind energy to electric energy conversion process, the efficiency loss performance of power module becomes more and more outstanding, and electric energy conversion efficiency is lower.
Disclosure of Invention
The invention aims to overcome the defect of low electric energy conversion efficiency of a converter in the prior art, and provides a wind turbine generator set, a control method and device thereof, electronic equipment and a storage medium.
The invention solves the technical problems through the following technical scheme:
in a first aspect, a control method for a wind turbine generator is provided, where the wind turbine generator includes a converter, and the converter includes a plurality of converter modules; the control method comprises the following steps:
determining the operation data of the wind turbine generator;
according to rated parameters of each conversion module, determining a target conversion module matched with the operation data and target operation data thereof from the plurality of conversion modules;
and controlling the target current transformation module to operate according to the target operation data and put into operation.
Optionally, the operational data includes:
current operating data of the wind turbine;
and/or trend information of the operating data of the wind turbine.
Optionally, in a case that the operation data includes current operation data of the wind turbine, determining a target conversion module and target operation data thereof, which are matched with the operation data, from the plurality of conversion modules includes:
under the condition that parameter values of all or part of parameters in the current operation data are changed and the change amplitude is larger than an amplitude change threshold value, re-determining a target current transformation module and target operation data thereof from the plurality of current transformation modules;
under the condition that the operation data comprise trend information of the operation data of the wind turbine generator, determining a target variable flow module matched with the operation data and target operation data thereof from the plurality of variable flow modules, wherein the method comprises the following steps:
and under the condition that the change amplitude of the parameter value of all or part of the parameters in the current operation data is determined to be larger than the amplitude change threshold value according to the trend information, and the change amplitude of the parameter value is still larger than the amplitude change threshold value after a preset time, re-determining a target variable flow module and target operation data thereof from the plurality of variable flow modules.
Optionally, the operation data of the wind turbine generator set includes operation power; rated parameters of the converter module comprise rated power;
determining a target conversion module from the plurality of conversion modules that matches the operational data, comprising:
under the condition that the rated power of each converter module is the same, determining the upward rounding result of the quotient of the operating power and the rated power as the number of the target converter modules;
and under the condition that the rated powers of all the converter modules are not identical, determining the sum of the rated powers of a combination comprising a plurality of converter modules, and determining the converter module contained in the combination corresponding to the sum of the rated powers equal to the operating power of the wind turbine generator or the sum of the rated powers which are greater than the operating power and are the minimum value as the target converter module.
Optionally, the operation data of the wind turbine generator set comprises an output current of the converter; rated parameters of the converter module comprise rated current;
and the difference between the sum of the rated currents of the target current transformation modules and the output current of the converter before the target current transformation modules are put into operation is smaller than a difference threshold.
Optionally, determining a target conversion module matching the operation data from the plurality of conversion modules includes:
determining the use loss value of each converter module, and sequencing the converter modules according to the sequence of the use loss values from low to high;
and determining a target variable flow module which is matched with the operation data from the plurality of variable flow modules which are ranked at the top.
In a second aspect, a control device for a wind turbine generator is provided, where the wind turbine generator includes a converter, and the converter includes a plurality of converter modules; the control device includes:
the determining module is used for determining the operating data of the wind turbine generator;
the matching module is used for determining a target conversion module matched with the operation data and target operation data thereof from the plurality of conversion modules according to the rated parameters of each conversion module;
and the control module is used for controlling the target current transformation module to operate according to the target operation data and put into operation.
Optionally, in a case that the operation data includes current operation data of the wind turbine, the matching module is configured to:
under the condition that parameter values of all or part of parameters in the current operation data are changed and the change amplitude is larger than an amplitude change threshold value, re-determining a target current transformation module and target operation data thereof from the plurality of current transformation modules;
the matching module is configured to, in the case that the operational data includes trend information of the operational data of the wind turbine generator:
and under the condition that the change amplitude of the parameter value of all or part of the parameters in the current operation data is determined to be larger than the amplitude change threshold value according to the trend information, and the change amplitude of the parameter value is still larger than the amplitude change threshold value after a preset time, re-determining a target variable flow module and target operation data thereof from the plurality of variable flow modules.
Optionally, the operational data includes:
current operating data of the wind turbine;
and/or trend information of the operating data of the wind turbine.
Optionally, the operation data of the wind turbine generator set includes operation power; rated parameters of the converter module comprise rated power;
the matching module includes:
a determining unit, configured to determine, as the number of target converter modules, an upward rounding result of a quotient between the operating power and a rated power when the rated powers of the converter modules are the same;
the determining unit is configured to determine, when the rated powers of the respective converter modules are not identical, a sum of the rated powers of a combination including the plurality of converter modules, and determine, as the target converter module, a converter module included in a combination corresponding to a sum of the rated powers equal to or greater than the operating power of the wind turbine generator and the sum of the rated powers that are the minimum value.
Optionally, the operation data of the wind turbine generator set comprises an output current of the converter; rated parameters of the converter module comprise rated current;
and the difference between the sum of the rated currents of the target current transformation modules and the output current of the converter before the target current transformation modules are put into operation is smaller than a difference threshold.
Optionally, the matching module comprises:
and the determining module is used for determining the use loss value of each converter module, sequencing the plurality of converter modules according to the sequence of the use loss values from low to high, and determining a target converter module matched with the operation data from the plurality of converter modules in the front sequence.
In a third aspect, an electronic device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method for controlling a wind turbine generator set according to any one of the foregoing embodiments is implemented.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which program, when being executed by a processor, realizes the steps of the control method of a wind turbine generator set according to any of the above.
In a fifth aspect, a wind turbine is provided, comprising:
a converter comprising a plurality of converter modules;
the control device is configured to determine operation data of the wind turbine generator, determine a target converter module matched with the operation data and target operation data thereof from the plurality of converter modules according to rated parameters of each converter module, and control the target converter module to operate and put into operation according to the target operation data.
The positive progress effects of the invention are as follows:
in the embodiment of the invention, the number and the operation data of the converter modules which are put into operation are determined according to the operation power of the wind turbine generator, rather than putting all the converter modules into operation in the operation process of the wind turbine generator, so that the converter modules which are put into operation can be ensured to operate at rated power or close to the rated power under the condition of higher or highest conversion efficiency of electric energy, the overall operation efficiency of the converter can be improved, and economic optimization is realized.
Drawings
FIG. 1 is a schematic structural view of a wind turbine generator set according to an exemplary embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method of controlling a wind turbine generator set in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a block diagram of a control apparatus of a wind turbine generator set according to an exemplary embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Fig. 1 is a schematic structural diagram of a wind turbine generator system according to an exemplary embodiment of the present invention, and referring to fig. 1, the wind turbine generator system includes a wind rotor 11, a gearbox 12, a generator 13, a converter 14, a filter 15, and a transformer 16, but the wind turbine generator system may also include, but is not limited to, a transmission system, a yaw system, a hydraulic system, a brake system, and other control systems, which are not shown in the drawings. The working process of the wind generating set is as follows: the wind wheel 11 is driven by wind to rotate, and the wind wheel 11 converts the captured wind energy into mechanical energy. The wind turbine 11 transfers mechanical energy to the generator 13 directly or through the gearbox 12, and the generator 13 converts the mechanical energy into electrical energy. The generator 13 outputs alternating current, which needs to be converted into power frequency alternating current by the converter 14, and then the alternating current is merged into the power grid 17 through the filter 15 and the transformer 16.
In the embodiment of the present disclosure, the converter 14 includes a plurality of converter modules 141, and the number of the converter modules 141 may be set according to actual situations, and is not limited to 3 shown in fig. 1, and may also be 4, 5, or even more. Each converter module 141 can independently realize the function of converting direct current into alternating current, and the capacity of the converter can be increased by connecting a plurality of converter modules 141 in parallel, that is, controlling the plurality of converter modules 141 to be operated so as to match the operation data of the wind turbine generator.
The following describes a specific implementation process for improving the operation efficiency of the wind turbine generator by controlling the converter module 141 that is put into operation, with reference to fig. 1.
Fig. 2 is a flowchart illustrating a control method for a wind turbine generator system according to an exemplary embodiment of the present invention, the control method is applicable to a full-power wind turbine generator system and also applicable to a doubly-fed wind turbine generator system, and referring to fig. 2, the method includes the following steps:
The operation data of the wind turbine generator set are used for determining a target converter module which needs to be put into operation and target operation data of the target converter module. It will be appreciated that the operational data of a wind turbine is influenced by a number of factors including air density, temperature, humidity, wind speed, etc. Any influencing factor changes, and the operation data of the wind turbine generator set changes. The master control system of the wind turbine generator set can calculate the operation data in real time according to the influence factors.
In one embodiment, the operation data includes current operation data of the wind turbine, the current operation data is operation data of the wind turbine determined in real time, and the following steps determine the target converter module and the target operation data thereof based on the current operation data. The current operating data may include, but is not limited to, at least one of the following parameters: operating power, converter output current, etc.
In one embodiment, the operation data includes trend information of the operation data of the wind turbine, the trend information of the operation data represents a future operation state of the wind turbine, that is, the operation state of the wind turbine is predicted, and the following steps determine the target converter module and the target operation data thereof based on the trend information of the operation data. The trend information of the operational data may include, but is not limited to, at least one of the following parametric trend information: trend information of the operating power, trend information of the output current of the converter, and the like.
In one embodiment, the operating data includes current operating data of the wind turbine and trend information of the operating data, and the following steps determine the target converter module and the target operating data thereof based on the current operating data of the wind turbine and the trend information of the operating data.
Wherein the rated parameters of the converter module comprise at least one of the following parameters: rated power and rated current. The rated parameter values of the respective converter modules may be the same or different, and the present invention is not limited to this.
In step 202, the target converter module is also a converter module to be put into operation, which is selected from a plurality of converter modules included in the converter. The sum of the rated parameter values of the selected target converter module is close to the corresponding parameter value in the operating data of the wind turbine generator. For example, taking the operation parameter of the wind turbine as the operation power, assuming that the operation power of the wind turbine is 6 mw, n converter modules should be selected from the plurality of converter modules as the target converter modules, so that the sum of the rated powers of the n target converter modules is close to 6 mw. And the target operation data of each target conversion module is determined according to the number of the target conversion modules and the operation data of the wind turbine generator.
In one embodiment, a target converter module and target operation data thereof which are matched with the operation data of the wind turbine generator are determined according to the rated power of the converter module.
In the case that the power ratings of the individual converter modules are the same, the number of target converter modules may be determined first. When the number of the target converter modules is determined, so that the sum of the rated power of the target converter modules to be put into operation is greater than or equal to the operating power of the wind turbine, the sum is matched with the operating power of the wind turbine, and the target converter modules to be put into operation are not too many, so that the target converter modules to be put into operation cannot be operated in a full-power or nearly full-power state, namely, cannot be operated at the rated power or nearly the rated power.
For example, assuming that the operating power of the wind turbine generator is 6 mw, the rated powers of 5 converter modules included in the converter are all 2 mw, and 6 ÷ 2 is 3, the number of target converter modules to be put into operation, which are matched with the operating power of the wind turbine generator, is determined to be 3. The sum of rated power of the 3 converter modules is 6 megawatts, when 3 of the 5 converter modules are put into operation and 2 are not put into operation, and the 3 converter modules are operated at the rated power, the total power of the converter (the sum of the power of the converter modules put into operation) is the same as the operating power of the wind turbine generator, then the 3 converter modules are determined to be matched with the operating power of the wind turbine generator, the 3 converter modules can all be operated at the rated power (target operating data), and the overall electric energy conversion efficiency of the converter is highest.
And assuming that the operating power of the wind turbine generator is 6 megawatts, the rated powers of 5 converter modules included in the converter are all 2.5 megawatts, and 6 ÷ 2.5 is 2.4, the number of target converter modules to be put into operation, which are matched with the operating power of the wind turbine generator, is determined to be 3. The sum of rated power of the 3 converter modules is 7.2 megawatts and is more than 6 megawatts, and the operation requirement of the wind turbine generator can be met. When 3 of the 5 converter modules are put into operation, 2 of the 5 converter modules are not put into operation, and 3 of the converter modules are operated at rated power or close to the rated power, the total power of the converter modules is slightly larger than or equal to the operating power of the wind turbine generator, then it is determined that the 3 converter modules can be matched with the operating power of the wind turbine generator, and the 3 converter modules can be operated at the rated power or close to the rated power, compared with the case that all the converter modules are put into operation, the overall electric energy conversion efficiency of the converter when the 3 converter modules are put into operation is higher.
It should be noted that, if the sum of the rated powers of all the target converter modules is greater than the operating power of the wind turbine, the operating powers (target operating data) of the target converter modules may be the same or different. Taking the above example as an example, the operating powers of the 3 converter modules may all be 2 megawatts, and at this time, the 3 converter modules all operate at a power close to the rated power; or 2 of the 3 converter modules run at a rated power of 2.5 megawatts and 1 of the 3 converter modules run at 1 megawatt; alternatively, 1 of the 3 converter modules operates at 2.5 megawatts rated and 2 operate at 1.75 megawatts.
Under the condition that the rated powers of all the converter modules are not identical, when the number of the target converter modules is determined, the sum of the rated powers of a combination comprising a plurality of converter modules is determined, and the number of the converter modules contained in the combination corresponding to the sum of the rated powers equal to or greater than the running power of the wind turbine generator and the sum of the rated powers which is the minimum value is determined as the number of the target converter modules.
For example, assuming that the operating power of the wind turbine generator is 6 mw, 5 converter modules included in the converter are a converter module a, a converter module b, a converter module c, a converter module d, and a converter module e, respectively, the rated powers are 2 mw, 3 mw, and 4 mw, respectively, the 5 converter modules are combined, and a partial combination mode in which the sum of the rated powers of the converter modules in the combination is greater than or equal to 6 mw includes:
the combination (1), the converter module a + the converter module e, the sum of rated power is 6 megawatts;
the combination (2), the converter module b and the converter module e have the rated power sum of 6 megawatts;
the combination (3), the current transformation module c and the current transformation module d have the rated power sum of 6 megawatts;
the combination (4), the current transformation module c and the current transformation module e have the rated power sum of 7 megawatts;
the combination (5), the current transformation module d + the current transformation module e, the sum of rated power is 7 megawatts;
the combination (6), the converter module a + the converter module b + the converter module c, and the sum of rated power is 7 megawatts;
in the above combinations, there is a combination in which the sum of rated powers is equal to the operating power of the wind turbine, and a combination in which the sum of rated powers is equal to the operating power of the wind turbine is preferentially considered, for example, the combination (1), the combination (2), and the combination (3), the number of converter modules included in any one of the combinations is determined as the number of target converter modules; taking the combination (1) as an example, if the number of converters in the combination is 2, determining that the number of target converter modules is 2, and selecting a converter module a and a converter module e by the target converter modules; taking the combination (2) as an example, if the number of converters in the combination is 2, determining that the number of target converter modules is 2, and selecting the converter modules b and e by the target converter modules; taking the combination (3) as an example, if the number of converters in the combination is 2, the number of target converter modules is determined to be 2, and the target converter modules select the converter modules a and e. And the operating power (target operating data) of each target converter module is the rated power.
Assuming that the operating power of the wind turbine generator is 6 megawatts, 4 converter modules included in the converter are respectively a converter module a, a converter module b, a converter module c and a converter module d, the rated powers are respectively 3 megawatts, 4 megawatts, 5 megawatts and 6 megawatts, the 4 converter modules are combined, and the partial combination mode that the sum of the rated powers of the converter modules in the combination is more than or equal to 6 megawatts comprises the following steps:
the combination (1), the converter module a + the converter module b, the sum of rated power is 7 megawatts;
the combination (2), the converter module a + the converter module c, the sum of rated power is 8 megawatts;
the combination (3), the converter module a + the converter module d, the sum of rated power is 9 megawatts;
the combination (4), the converter module b and the converter module c have the rated power sum of 10 megawatts;
the combination (5), the converter module a + the converter module b + the converter module c, the sum of rated power is 12 megawatts;
in the above combinations, the sum of the rated powers is greater than the operating power of the wind turbine, and the sum of the rated powers of the combination (1) is the minimum, the number of the converter modules included in the combination (1) is determined as the number of the target converter modules, that is, the number of the target converter modules is 2.
Because the sum of the rated power of all the target converter modules in the combination (1) is greater than the operating power of the wind turbine generator, the operating power (target operating data) of each target converter module can be the same or different. Taking the above example as an example, the operating powers of 2 converter modules may all be 3 mw, at this time, the converter module a operates at the rated power, and the converter module b operates at the power close to the rated power; alternatively, the converter module b operates at a rated power of 4 megawatts and the converter module a operates at 2 megawatts.
The operating data of the wind turbine generator is influenced by a plurality of factors, including air density, temperature, humidity, wind speed and the like, and the operating data of the wind turbine generator changes, so that the operating data of the current converter module which is put into operation may not match the operating data of the wind turbine generator, and the target converter module to be put into operation and the target operating data thereof need to be determined again.
Under the condition that the target converter module is determined based on the current operating data of the wind turbine generator, when the parameter values of all or part of the parameters in the current operating data are changed and the change amplitude is greater than the amplitude change threshold value, the target converter module and the target operating data thereof can be re-determined, and the converter module which is put into operation is switched, namely the target converter module is controlled to be put into operation.
Under the condition that a target current transformation module is determined based on trend information of operating data of the wind turbine generator, the target current transformation module can be re-determined and the current transformation module put into operation is switched under the condition that the change amplitude of all or part of parameters in the operating data is determined to be larger than an amplitude change threshold value and the change frequency is not large, namely the change amplitude of the preset duration parameter value is still larger than the amplitude change threshold value; and if the variation amplitude of the parameter value is greater than the amplitude variation threshold value, but the variation amplitude of the preset duration parameter value is not greater than the amplitude variation threshold value, that is, the variation amplitude of the preset duration parameter value is smaller, the target converter module does not need to be determined again, so as to avoid power loss caused by frequently switching the converter modules which are put into operation. The preset duration can be set according to the actual situation.
For example, if the 8:00 determines that the operating power of the wind turbine generator changes from 6 megawatts to 5 megawatts, the target converter module should be determined again, but the trend of the operating power is expected, and the prediction result is that the operating power of the 8:05 generator set is about 5.3 megawatts, which means that the operating power of the wind turbine generator increases back to some extent in the future, the 8:00 does not determine the target converter module again, and does not switch the converter modules which are put into operation, so as to avoid power loss caused by frequently switching the converter modules which are put into operation.
In any of the above embodiments, when the target converter module is determined, smooth conversion of the converter module switched to be in operation is also considered, that is, the difference between the sum of the rated currents of the determined target converter module and the output current of the converter before the target converter module is put into operation is smaller than the difference threshold, so that the current output by the converter after the target converter module is put into operation and before the target converter module is switched to be in operation is not suddenly changed, stability of the current output by the converter is ensured, smooth conversion and flexible control of switching of the converter module are realized, and disturbance to a power grid is avoided. Wherein, the difference threshold value can be set according to actual requirements.
In any of the above embodiments, when determining the target converter module, the usage loss of each converter module may be considered, specifically: determining the use loss value of each current transformation module, wherein the use loss value is positively correlated with the use frequency or the service life; sequencing the plurality of current transformation modules according to the sequence of using loss values from low to high; the number of target converter modules matching the operational data is determined from the top ranked plurality of converter modules. The former converter module is preferably determined as the target converter module in order to ensure that the loss values of the converter modules are the same or as close as possible.
The service loss value of the converter module may be, but is not limited to being, determined by a life estimation model whose input parameters include at least one of the following: the output parameters of the life estimation model include the service loss value of the current transformation module, which can be characterized by temperature and switching frequency. The life estimation model may be obtained by training the neural network through a large amount of sample data, and the specific training process of the model may refer to the description of the related art, which is not described herein again.
In any of the above embodiments, when determining the target variable flow module, the target variable flow module may be determined in a time-series polling manner. For example, if there are N converter modules, if the converter module a and the converter module B are always put into operation and the other converter modules are always waiting to operate, the service lives of the converter module a and the converter module B are greatly reduced.
In any of the above embodiments, when determining the target current transformation module, the target current transformation module may be determined in a principle of reducing the switching times of the switch by considering the switching loss of the switch. For example, if the sum of the rated powers of the currently-operated converter modules is less than the operating power of the wind turbine generator, the currently-operated converter modules should be added, and then the corresponding switch states of the currently-operated converter modules are not changed, but a proper converter module is selected from the converter modules which are not operated as a target converter module, and the currently-operated converter modules are controlled to be operated.
In any of the above embodiments, the operating state of each converter module may also be monitored to determine whether the converter module has a fault, and the converter module with the fault is prevented from being put into operation, so as to ensure normal operation of the wind turbine generator.
And step 203, controlling the target variable flow module to operate according to the target operation data and put into operation.
In one embodiment, each converter module is in a parallel structure, and the on-off of each converter module realizes the operation or stop of the converter module by controlling the on-off of an IGBT. The converter module which is put into operation can convert alternating current output by the generator into power frequency alternating current, and the converter module which stops operation does not work.
For example, referring to fig. 1, it is assumed that the rated powers of the three converter modules in the drawing are all 2 mw, the operating power of the wind turbine generator is changed from 4 mw to 2 mw, the number of the converter modules put into operation is changed from 2 to 1, and if the converter modules a and B are put into operation when the operating power of the wind turbine generator is 4 mw, the converter modules a or B need to be turned off. Wherein, the converter module a or B is selectively disconnected, and the usage loss value and the polling time of the converter module a and the converter module B may be referred to.
In the embodiment of the invention, the number and the operation data of the converter modules which are put into operation are determined according to the operation power of the wind turbine generator, rather than putting all the converter modules into operation in the operation process of the wind turbine generator, so that the converter modules which are put into operation can be ensured to operate at rated power or close to the rated power under the condition of higher or highest conversion efficiency of electric energy, the overall operation efficiency of the converter can be improved, and economic optimization is realized.
Corresponding to the control method embodiment of the wind turbine generator, the invention also provides an embodiment of a control device of the wind turbine generator.
Fig. 3 is a schematic block diagram of a control apparatus of a wind turbine generator system according to an exemplary embodiment of the present invention, the control apparatus including:
the determining module 31 is used for determining the operation data of the wind turbine;
a matching module 32, configured to determine, according to a rated parameter of each converter module, a target converter module matched with the operation data and target operation data thereof from the plurality of converter modules;
and the control module 33 is configured to control the target converter module to operate according to the target operation data and put into operation.
Optionally, the operational data includes:
current operating data of the wind turbine;
and/or trend information of the operating data of the wind turbine.
Optionally, in a case that the operation data includes current operation data of the wind turbine, the matching module is configured to:
under the condition that parameter values of all or part of parameters in the current operation data are changed and the change amplitude is larger than an amplitude change threshold value, re-determining a target current transformation module and target operation data thereof from the plurality of current transformation modules;
the matching module is configured to, in the case that the operational data includes trend information of the operational data of the wind turbine generator:
and under the condition that the change amplitude of the parameter value of all or part of the parameters in the current operation data is determined to be larger than the amplitude change threshold value according to the trend information, and the change amplitude of the parameter value is still larger than the amplitude change threshold value after a preset time, re-determining a target variable flow module and target operation data thereof from the plurality of variable flow modules.
Optionally, the operation data of the wind turbine generator set includes operation power; rated parameters of the converter module comprise rated power;
the matching module includes:
a determining unit, configured to determine, as the number of target converter modules, an upward rounding result of a quotient between the operating power and a rated power when the rated powers of the converter modules are the same;
the determining unit is configured to determine, when the rated powers of the respective converter modules are not identical, a sum of the rated powers of a combination including the plurality of converter modules, and determine, as the target converter module, a converter module included in a combination corresponding to a sum of the rated powers equal to or greater than the operating power of the wind turbine generator and the sum of the rated powers that are the minimum value.
Optionally, the operation data of the wind turbine generator set comprises an output current of the converter; rated parameters of the converter module comprise rated current;
and the difference between the sum of the rated currents of the target current transformation modules and the output current of the converter before the target current transformation modules are put into operation is smaller than a difference threshold.
Optionally, the matching module comprises:
and the determining module is used for determining the use loss value of each converter module, sequencing the plurality of converter modules according to the sequence of the use loss values from low to high, and determining a target converter module matched with the operation data from the plurality of converter modules in the front sequence.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Fig. 4 is a schematic diagram of an electronic device according to an exemplary embodiment of the present invention, and illustrates a block diagram of an exemplary electronic device 40 suitable for implementing embodiments of the present invention. The electronic device 40 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in FIG. 4, electronic device 40 may take the form of a general purpose computing device, which may be a server device, for example. The components of electronic device 40 may include, but are not limited to: the at least one processor 41, the at least one memory 42, and a bus 43 connecting the various system components (including the memory 42 and the processor 41).
The bus 43 includes a data bus, an address bus, and a control bus.
The memory 42 may include volatile memory, such as Random Access Memory (RAM)421 and/or cache memory 422, and may further include Read Only Memory (ROM) 423.
The processor 41 executes various functional applications and data processing, such as the methods provided by any of the above embodiments, by running a computer program stored in the memory 42.
The electronic device 40 may also communicate with one or more external devices 44 (e.g., keyboard, pointing device, etc.). Such communication may be through an input/output (I/O) interface 45. Also, the model-generated electronic device 40 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via a network adapter 46. As shown, the network adapter 46 communicates with the other modules of the model-generated electronic device 40 over a bus 43. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating electronic device 40, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method provided in any of the above embodiments.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (14)
1. The control method of the wind turbine is characterized in that the wind turbine comprises a converter, wherein the converter comprises a plurality of converter modules; the control method comprises the following steps:
determining the operation data of the wind turbine generator;
according to rated parameters of each conversion module, determining a target conversion module matched with the operation data and target operation data thereof from the plurality of conversion modules;
and controlling the target current transformation module to operate according to the target operation data and put into operation.
2. The control method of claim 1, wherein the operational data comprises:
current operating data of the wind turbine;
and/or trend information of the operating data of the wind turbine.
3. The control method according to claim 2, wherein, in the case that the operating data includes current operating data of the wind turbine, determining a target converter module and its target operating data from the plurality of converter modules that match the operating data includes:
under the condition that parameter values of all or part of parameters in the current operation data are changed and the change amplitude is larger than an amplitude change threshold value, re-determining a target current transformation module and target operation data thereof from the plurality of current transformation modules;
under the condition that the operation data comprise trend information of the operation data of the wind turbine generator, determining a target variable flow module matched with the operation data and target operation data thereof from the plurality of variable flow modules, wherein the method comprises the following steps:
and under the condition that the change amplitude of the parameter value of all or part of the parameters in the current operation data is determined to be larger than the amplitude change threshold value according to the trend information, and the change amplitude of the parameter value is still larger than the amplitude change threshold value after a preset time, re-determining a target variable flow module and target operation data thereof from the plurality of variable flow modules.
4. The control method according to claim 1, wherein the operating data of the wind turbine generator comprises operating power; rated parameters of the converter module comprise rated power;
determining a target conversion module from the plurality of conversion modules that matches the operational data, comprising:
under the condition that the rated power of each converter module is the same, determining the upward rounding result of the quotient of the operating power and the rated power as the number of the target converter modules;
and under the condition that the rated powers of all the converter modules are not identical, determining the sum of the rated powers of a combination comprising a plurality of converter modules, and determining the converter module contained in the combination corresponding to the sum of the rated powers equal to the operating power of the wind turbine generator or the sum of the rated powers which are greater than the operating power and are the minimum value as the target converter module.
5. The control method according to any one of claims 1 to 4, characterized in that the operating data of the wind turbine comprise the output current of the converter; rated parameters of the converter module comprise rated current;
and the difference between the sum of the rated currents of the target current transformation modules and the output current of the converter before the target current transformation modules are put into operation is smaller than a difference threshold.
6. The method of claim 1, wherein determining a target conversion module from the plurality of conversion modules that matches the operational data comprises:
determining the use loss value of each converter module, and sequencing the converter modules according to the sequence of the use loss values from low to high;
and determining a target variable flow module which is matched with the operation data from the plurality of variable flow modules which are ranked at the top.
7. The control device of the wind turbine is characterized in that the wind turbine comprises a converter, wherein the converter comprises a plurality of converter modules; the control device includes:
the determining module is used for determining the operating data of the wind turbine generator;
the matching module is used for determining a target conversion module matched with the operation data and target operation data thereof from the plurality of conversion modules according to the rated parameters of each conversion module;
and the control module is used for controlling the target current transformation module to operate according to the target operation data and put into operation.
8. The control apparatus of claim 7, wherein in the case that the operational data comprises current operational data of the wind turbine, the matching module is configured to:
under the condition that parameter values of all or part of parameters in the current operation data are changed and the change amplitude is larger than an amplitude change threshold value, re-determining a target current transformation module and target operation data thereof from the plurality of current transformation modules;
the matching module is configured to, in the case that the operational data includes trend information of the operational data of the wind turbine generator:
and under the condition that the change amplitude of the parameter value of all or part of the parameters in the current operation data is determined to be larger than the amplitude change threshold value according to the trend information, and the change amplitude of the parameter value is still larger than the amplitude change threshold value after a preset time, re-determining a target variable flow module and target operation data thereof from the plurality of variable flow modules.
9. The control device of claim 7, wherein the operating data of the wind turbine comprises operating power; rated parameters of the converter module comprise rated power;
the matching module includes:
a determining unit, configured to determine, as the number of target converter modules, an upward rounding result of a quotient between the operating power and a rated power when the rated powers of the converter modules are the same;
the determining unit is configured to determine, when the rated powers of the respective converter modules are not identical, a sum of the rated powers of a combination including the plurality of converter modules, and determine, as the target converter module, a converter module included in a combination corresponding to a sum of the rated powers equal to or greater than the operating power of the wind turbine generator and the sum of the rated powers that are the minimum value.
10. The control device according to any one of claims 7 to 9, wherein the operating data of the wind turbine generator comprises an output current of the converter; rated parameters of the converter module comprise rated current;
and the difference between the sum of the rated currents of the target current transformation modules and the output current of the converter before the target current transformation modules are put into operation is smaller than a difference threshold.
11. The control device of claim 7, wherein the matching module comprises:
and the determining module is used for determining the use loss value of each converter module, sequencing the plurality of converter modules according to the sequence of the use loss values from low to high, and determining a target converter module matched with the operation data from the plurality of converter modules in the front sequence.
12. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the control method of the wind turbine generator set according to any one of claims 1 to 6 when executing the computer program.
13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the control method of a wind turbine generator according to any one of claims 1 to 6.
14. A wind turbine, comprising:
a converter comprising a plurality of converter modules;
the control device according to any one of claims 7 to 11, configured to determine operating data of the wind turbine, determine, from the plurality of converter modules, a target converter module matching the operating data and target operating data thereof according to rated parameters of each converter module, and control the target converter module to operate and put into operation with the target operating data.
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