WO2016107314A1 - 风力发电机组的输出功率补偿方法、装置和系统 - Google Patents
风力发电机组的输出功率补偿方法、装置和系统 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000012545 processing Methods 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000011217 control strategy Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
- F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
-
- 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
-
- 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
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
-
- 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
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
-
- 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
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
-
- 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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1033—Power (if explicitly mentioned)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/303—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/325—Air temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/335—Output power or torque
-
- 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
Definitions
- the present invention relates to the field of wind power technologies, and in particular, to a method, device and system for output power compensation of a wind power generator set.
- units With the continuous increase of the installed capacity of wind turbines (referred to as "units"), the industry's performance requirements for the units are also getting higher and higher.
- a gain value for tracking the maximum wind energy utilization is involved. The more consistent the gain value is with the actual wind energy resource, the unit's control strategy can capture the wind energy more accurately and improve. The amount of electricity generated by the unit. If the gain value deviates from the actual situation, it will affect the effect of the control strategy and affect the unit's ability to capture wind energy, thus affecting the unit's power generation.
- the parameters closely related to the gain value some are closely related to the characteristics of the unit itself, such as the tip speed ratio and the wind energy utilization coefficient, and there are also parameters closely related to wind resources, such as air density.
- the parameters such as the tip speed ratio and the wind energy utilization coefficient are fixed with the completion of the unit design, and it is difficult to modify the design and control, and the air density varies with the geographical position of the wind farm.
- the annual average air density is often used, or the annual average air temperature is calculated to obtain the annual average air density, and then the annual average air density is used to calculate the gain value in the speed torque control strategy. Since the air density is greatly affected by the season and temperature, it is obvious that the gain value calculated by this method always has a large deviation from the actual value. At the same time, the method fails to consider different unit individuals under different terrain conditions and different seasons. There is a difference in the individual power output and consumption, resulting in a personalized difference in the respective gain values.
- Embodiments of the present invention provide an output power compensation method, apparatus, and system for a wind power generator to achieve output power compensation for a running fan to ensure stable output power of the unit.
- an embodiment of the present invention provides a method for compensating an output power of a wind power generator, including:
- the first ambient temperature in the current period and the average value of the first ambient temperature in the previous period are greater than a preset temperature threshold, the first ambient temperature is averaged according to the current period and the previous period.
- the difference between the values is power compensated for the unit output power collected at the end of the current period to ensure that the unit output power is stable; the temperature threshold is that the wind turbine is in a full state
- the power of the Internet is equal to the corresponding ambient temperature value at rated power.
- An embodiment of the present invention further provides an output power compensation device for a wind power generator, comprising:
- a first obtaining module configured to obtain an average value of a first ambient temperature of an environment in which the wind turbine is located in each cycle
- a first collecting module configured to collect a unit output power of the wind power generator corresponding to an end time of each cycle
- a compensation module configured to: if the first ambient temperature average value in the current period and the first ambient temperature average value in the previous period are greater than a preset temperature threshold, according to the current period and the previous period The difference between the average values of the first ambient temperatures is power compensated for the output power of the unit collected at the end of the current period to ensure that the output power of the unit is stable; the temperature threshold is the wind turbine In the full state, the power of the Internet is equal to the corresponding ambient temperature value at the rated power.
- An embodiment of the present invention provides an output power compensation system for a wind power generator, comprising: a cluster controller and a single controller disposed on each of the wind turbines;
- the stand-alone controller includes:
- a single machine acquisition module for obtaining an average value of a first ambient temperature of an environment in which the wind turbine is located in each cycle
- a single-machine acquisition module configured to collect the output power of the unit corresponding to the wind turbine at the end of each cycle
- a stand-alone compensation module configured to receive power compensation by the control of the cluster controller for the output power of the unit collected at an end time of the current period
- the cluster controller includes:
- a cluster obtaining module configured to obtain, from each of the single-machine controllers, an average value of a first ambient temperature of an environment in which the wind turbine is located in each cycle;
- a cluster collection module configured to collect, from each of the single-machine controllers, a unit output power corresponding to the wind turbine at an end time of each cycle;
- a cluster compensation module configured to: if the first ambient temperature average corresponding to each of the wind turbines in the current cycle and the first ambient temperature average in the previous week are greater than a corresponding pre-corresponding to the wind turbine
- the set temperature threshold is controlled according to the difference between the average value of the first ambient temperature in the current period of each of the wind turbines and the previous one of the previous period, and the corresponding single machine controller collects the end time of the current period.
- the output power of the unit is subjected to power compensation to ensure that the output power of each unit is stable; and the temperature threshold is an ambient temperature value corresponding to the rated power of the wind power generator in a full-state state.
- the method, device and system for output power compensation of a wind power generator provided by an embodiment of the present invention, by introducing a temperature threshold and combining the output power of the wind power generator with the change of the ambient temperature, performing power compensation on the unit output power of the unit, To ensure that the unit output power is stable.
- the technical solution of the embodiment of the invention can be applied to various wind power generator sets.
- FIG. 1 is a flow chart of a method for an embodiment of an output power compensation method for a wind power generator according to the present invention
- FIG. 2a is a flowchart of a method for acquiring a temperature threshold in the embodiment shown in FIG. 1 according to the present invention
- FIG. 2b is a schematic diagram showing an annual variation curve of an average self-consumption power in a full-sending state according to an embodiment of the present invention
- 2c is a schematic diagram showing an annual variation curve of an average unit output power in a full-state state according to an embodiment of the present invention
- 2d is a schematic diagram showing a year-round variation curve of a second ambient temperature average value according to an embodiment of the present invention
- FIG. 3 is a flow chart of a method for another embodiment of an output power compensation method for a wind power generator according to the present invention.
- FIG. 4a is a schematic structural view of an embodiment of an output power compensation device for a wind power generator according to the present invention.
- FIG. 4b is a schematic structural view of another embodiment of an output power compensation device for a wind power generator according to the present invention.
- FIG. 4c is a schematic structural view of still another embodiment of an output power compensation device for a wind power generator according to the present invention.
- 5a is a schematic structural view of an embodiment of an output power compensation system for a wind power generator according to the present invention.
- 5b is a schematic structural view of a single-machine controller in an output power compensation system of a wind power generator provided by the present invention
- FIG. 5c is a schematic structural diagram of a cluster controller in an output power compensation system of a wind power generator provided by the present invention.
- FIG. 1 is a flow chart of a method for an output power compensation method of a wind power generator according to an embodiment of the present invention.
- the execution body of the method may be an output power compensation system in the unit, or a compensation device or module integrated in the system. .
- the output power compensation method of the wind power generator specifically includes:
- At least one sampling time point may be set on average in each of the above periods, and the temperature of the environment in which the wind power generator is located is measured by the temperature measuring device as the first ambient temperature when each sampling time point arrives, and all the measurements are obtained by the measurement.
- An ambient temperature is used to calculate a corresponding first ambient temperature average over each cycle by a method such as weighted averaging or algebraic averaging.
- S102 Collect the output power of the unit corresponding to the wind turbine at the end of each cycle.
- the output power of the unit converts the wind energy absorbed by the blades into electric energy per unit time.
- the output power is affected by the wind energy utilization coefficient of the blades and the mechanical transmission efficiency of the unit.
- the unit output power is the net power, that is, the power delivered to the grid, after deducting its own consumption rate. The following relationship exists between these three powers:
- the unit When the power of the Internet is greater than or equal to the rated power of the unit itself, the unit supplies power to the grid with the rated power; when the power of the grid is less than the rated power of the unit itself, the unit supplies power to the grid with the power of the grid.
- the power consumption of the unit itself is the power consumed by the unit's own electrical components, and its size is related to the working state of each electrical component in the unit;
- the output power of the group is closely related to the ambient temperature, and the influence of the ambient temperature is more obvious. The reason is that as the ambient temperature increases, the air density decreases, causing the output power of the unit to drop at the same wind speed.
- the unit needs to consume more energy for heat dissipation, which leads to an increase in the power consumption of the unit itself.
- the decrease in output power of the unit and the increase in power consumption of the unit will result in a decrease in the power consumption of the unit, and the increase in the power consumption of the unit itself may be equivalent to the equivalent of the unit output power.
- the unit output power can be compensated according to the change of the ambient temperature to ensure the unit output power is stable, thereby stabilizing the unit's power and thus stabilizing.
- the amount of power generated by the unit's external network S103, if the average value of the first ambient temperature in the current period and the average value of the first ambient temperature in the previous period are greater than a preset temperature threshold, according to the average value of the first ambient temperature in the current period and the previous period.
- the difference is power compensated for the output power of the unit collected at the end of the current period to ensure that the output power of the unit is stable;
- the temperature threshold is the corresponding ambient temperature value when the power of the wind turbine is equal to the rated power in the fully-on state.
- the actual unit output power of the unit decreases as the ambient temperature rises. This means that in the winter with lower temperature, the output power of the unit will be relatively large. After deducting the average self-consumption power of the unit itself, the power of the unit in winter will still be higher than the rated power of the unit, which enables the unit to supply the power grid with rated power. Power is supplied. In the summer, especially in the case of high temperature, the output power of the unit will be relatively small. After deducting the average power consumption of the unit itself, the power of the unit in summer is likely to be lower than the rated power of the unit. The unit can only use the actual power. Power is supplied to the grid, which reduces the overall power generation of the unit.
- the unit When the unit is running in the full state, and when the ambient temperature is higher than the above temperature threshold, the current output power of the unit is low, and the unit may not be able to supply power to the grid with the rated power. Therefore, in order to make the output power of the unit in the full-state state as much as possible, the unit can supply power to the external power grid with the rated power.
- the temperature threshold is used as a reference point, and the first ambient temperature average value in the current period is used. And the first environment during the previous week If the average temperature is greater than the temperature threshold, the power output of the unit output collected at the end of the current period is compensated according to the difference between the current period and the average value of the first ambient temperature in the previous period to ensure the output power of the unit. stable.
- the corresponding compensated power is The absolute value of the absolute value is smaller; on the contrary, the absolute value of the power corresponding to the compensation is larger. If the first ambient temperature average value in the current period and the first ambient temperature average value in the previous week period are both greater than the temperature threshold value, and the first ambient temperature average value in the current period is greater than the first ambient temperature average value in the previous week period. , the corresponding compensation power is positive; otherwise, the corresponding compensation power is negative, thus ensuring the unit output power is stable.
- the above scheme of determining and compensating the output power of the unit by using the temperature threshold is also applicable when the unit is operating in a non-full state.
- the reason is that the unit output power corresponding to the unit decreases with the increase of the ambient temperature. Applicable in any state. Therefore, in the present embodiment, when the unit output power of the unit is compensated, the output power of the unit to be compensated is the unit output power of each unit in the operating state (full state or non-full state).
- the specific method of power compensation can be completed by torque compensation, that is, the specific power value compensated is converted into the extra torque output of the unit, thereby improving the output power of the unit.
- torque compensation that is, the specific power value compensated is converted into the extra torque output of the unit, thereby improving the output power of the unit.
- the manner in which the specific power compensation is adopted in this embodiment is not limited.
- the output power compensation method of the wind power generator provided by the embodiment of the present invention, by introducing a temperature threshold and combining the output power of the wind power generator with the change of the ambient temperature, power compensation of the unit output power of the unit to ensure the unit output The power is stable.
- the technical solution of the embodiment of the invention can be applied to various wind power generator sets.
- FIG. 2a is a flow chart of a method for acquiring a temperature threshold in the embodiment shown in FIG. 1 according to the present invention. As shown in FIG. 2a, the method for obtaining the temperature threshold specifically includes:
- S201 Acquire an average unit output power and an average grid power of the wind turbine in the full year of the whole year.
- the ambient wind speed has a greater impact on the output power of the unit, and indirectly affects the power of the grid. Therefore, when the average unit output power and average grid power of the wind turbines in the full-year state are obtained, the average unit output power and average grid power are obtained. Should take into account the effects of wind speeds in different environments Specific gravity and role.
- step S201 provides a specific implementation manner of step S201, including steps (steps 1 to 3) as follows:
- Step 1 Collect the unit output power, the grid power and the ambient wind speed value of the wind turbine corresponding to each sampling time in the whole year;
- the above three collected data can be used as collection samples for historical data of unit operation.
- all running transient data instantaneous time can be 20ms, 1s or 7s
- each sample point corresponds to one sampling moment.
- 7s operation instantaneous data is used to correspond to one sampling time.
- the historical data of the operation of the unit is collected, and the unit output power, the net power and the ambient wind speed value of the wind turbine corresponding to the sampling time are obtained.
- Step 2 Calculate the unit output power, the grid power and the ambient wind speed value of the wind turbines collected at each sampling time in the whole year according to the month, and calculate the output power of each unit and the power of the grid in different ambient wind speeds. The corresponding average value under the segment.
- the data Before the data is statistically analyzed, the data can be screened to ensure the validity of the final result, such as data of the unit's limited power operation and small wind speed data (corresponding data when the ambient wind speed is lower than 2 m/s).
- the data of the unit in the full-sending state is extracted as the data to be processed in this step.
- the data collected at each sampling time can be first processed according to the ambient wind speed, and each bin corresponds to a fixed ambient wind speed segment, for example, when the ambient wind speed is between 4.75 m/s and 5.25 m/s.
- the corresponding ambient wind speed segment is 5m/s; then the unit output power, the grid power and the ambient wind speed value of the above-mentioned extracted unit in the full-state state are counted according to the month, and the output power and the grid power of each unit are calculated in different environments.
- the corresponding average value under the wind speed segment For example, the algebraic average of the unit output power and the grid power corresponding to each month in different ambient wind speed segments can be taken as the corresponding average value in the corresponding wind speed segment.
- Step 3 According to the average value of the unit output power and the grid power of each month under different ambient wind speed segments, obtain the average unit output power and average grid power of the wind turbines in each month of the year.
- the algebraic mean or weighted average of the average output power of the unit and the power of the Internet in each ambient wind speed segment can be used as the corresponding average unit output power or average grid power of each unit in the full-on state.
- the acquisition unit is full.
- the specific method used for the corresponding average unit output power or average grid power of each month in the state of the transmission is not limited.
- the difference between the average unit output power and the average on-grid power of the wind turbine in the full-year state for each month can be taken as the average self-consumption power of each month.
- the average self-consumption power of each month obtained is obtained by curve fitting in a two-dimensional coordinate system to form a full-year variation curve of the average self-consumption power in the full-state state.
- FIG. 2b is a schematic diagram showing the annual variation curve of the average self-consumption power under the full-state state (rated power of 1500 KW) according to the embodiment. As shown in Fig. 2b, the abscissa is time and the ordinate is the average self-consumption power in the full-state state.
- the average unit output power of the wind turbine in the full-year state is calculated by curve fitting to construct the annual variation curve of the average unit output power in the full-state state.
- FIG. 2c is a schematic diagram showing the annual variation curve of the average unit output power in the full-state state (rated power of 1500 KW) provided in the embodiment. As shown in Fig. 2c, the abscissa is time and the ordinate is the average unit output power in the full state.
- the curve value in FIG. 2c is correspondingly subtracted from the curve value in FIG. 2b, and the corresponding time point when the obtained difference is equal to 1500 KW (rated power) is determined as the above specific time point.
- the specific time point appears at two points A and B.
- FIG. 2 is a schematic diagram showing the annual variation curve of the second ambient temperature average value provided by the embodiment. As shown in Figure 2d, the abscissa is time and the ordinate is the second ambient temperature average of the environment in which the unit is located.
- the above temperature threshold can be set to 13 ° C.
- the method for obtaining a temperature threshold determines the average on-line power of the unit by using the first two curves by constructing an annual variation curve of the average unit output power, the average self-consumption power, and the second ambient temperature average of the unit; Using a specific on-grid power equal to a specific time point corresponding to the rated power lock, and locking the temperature threshold in the annual variation curve of the second ambient temperature average according to the specific time point, thereby implementing a specific method for determining the temperature threshold, The determined temperature threshold is made more informative.
- FIG. 3 is a flow chart of a method for compensating an output power of a wind power generator according to another embodiment of the present invention, which may be regarded as a specific implementation manner of the embodiment shown in FIG. 1.
- the embodiment further refines step S103, that is, introduces a rate of change function.
- the specific acquisition method of the change rate function is:
- the method for compensating the output power of the wind turbine shown in FIG. 3 may specifically include the following steps:
- the difference between the average value of the first ambient temperature in the current period and the previous week ie, the increment of the average value of the first ambient temperature in the previous week
- ⁇ y the increment ⁇ x.
- the average unit output power increment ⁇ y corresponding to the difference is obtained as the unit output power increment.
- the unit output power increment is used as the power compensation amount to perform power compensation on the unit output power collected at the end time of the current period to ensure that the unit output power is stable;
- the temperature threshold is the power of the wind power generator in the full-state state.
- the corresponding ambient temperature value equal to the rated power.
- step S103 For the specific compensation method and principle, refer to the corresponding content in step S103, and no further details are provided herein.
- steps S303 to S304 can be regarded as the thinning mode of step S103.
- the output power compensation method of the wind power generator provided by the embodiment of the present invention introduces the concept of the change rate function on the basis of the embodiment shown in FIG. 1 and averages the first ambient temperature in the current period and the previous period. The difference between the values is substituted into the rate of change function to solve the specific value of the power compensation, so that the compensation of the output power of the unit is more precise.
- the solution of the embodiment can further solve the obtained temperature threshold by referring to the method described in FIG. 2a to further correct and optimize the process of obtaining the power compensation amount.
- FIG. 4a is a schematic structural view of an embodiment of an output power compensation device for a wind power generator according to the present invention, which can be used to perform the method steps of the embodiment shown in FIG. 1, as shown in FIG. 4a, the output power compensation device of the wind power generator set.
- the first acquiring module 41, the first collecting module 42 and the compensating module 43 are:
- the first obtaining module 41 is configured to obtain a first ambient temperature average value of the environment in which the wind power generator is located in each cycle;
- the first collecting module 42 is configured to collect the output power of the unit corresponding to the wind turbine at the end of each cycle;
- the compensation module 43 is configured to: if the first ambient temperature average value in the current period and the first ambient temperature average value in the previous period are greater than a preset temperature threshold, according to the first ambient temperature average in the current period and the previous period The difference between the values is power compensated for the unit output power collected at the end of the current period to ensure that the unit output power is stable;
- the threshold is the ambient temperature value corresponding to the rated power of the wind turbine in the fully-on state.
- the output power compensation device of the wind power generator may further include:
- the second obtaining module 44 is configured to obtain an average unit output power and an average grid power of the wind turbines in the full year of the whole year;
- the first processing module 45 is configured to calculate an average self-power consumption of the wind turbine in each month of the whole year according to the average unit output power and the average grid power of the wind turbine in the full-year state, and calculate the curve through the curve.
- the annual variation curve of the average self-consumption power in the full-scale state is constructed;
- the second processing module 46 is configured to construct an annual variation curve of the average unit output power in the full-state state by curve fitting of the average unit output power of the wind turbine in the full-year state;
- the extraction module 47 is configured to extract a time-average curve of the average unit output power corresponding to the annual change curve of the average self-consumption power, and obtain a time point at which the difference is equal to the rated power as a specific time point;
- the third processing module 48 is configured to obtain an average value of the second ambient temperature of the environment in which the wind turbine is in the full year of the whole year, and construct a full average of the second ambient temperature in the full state by curve fitting.
- the determining module 49 is configured to determine a temperature threshold according to a second ambient temperature average corresponding to the specific time point in the annual variation curve of the second ambient temperature average.
- the foregoing second obtaining module 44 may specifically include:
- the collecting unit 441 is configured to collect the output power, the net power and the ambient wind speed value of the wind turbine generating unit corresponding to each sampling moment in the whole year;
- the first processing unit 442 is configured to collect the output power, the power of the grid, and the ambient wind speed of the wind turbine set collected at each sampling time in the whole year according to the month, and calculate the output power of the unit and the Internet respectively. The corresponding average value of power under different ambient wind speed segments;
- the second processing unit 443 is configured to obtain an average unit output power and an average on-line power of the wind generator set in the full-year state according to the average value of the unit output power and the grid power in different ambient wind speed segments. .
- the output power compensation device of the wind power generator may further include:
- the fourth processing module 50 is configured to calculate, according to the annual variation curve of the average unit output power and the annual variation curve of the second ambient temperature average, the unit output power of the wind turbine in the full-state state varies with the second ambient temperature. Rate of change function.
- the foregoing compensation module 43 may specifically include:
- a third processing unit 431, configured to substitute a difference between the current period and the first ambient temperature average value in the current period into the change rate function to obtain a unit output power increment corresponding to the difference;
- the compensation unit 432 is configured to perform power compensation on the unit output power collected at the end time of the current period by using the unit output power increment as the power compensation amount.
- the method steps of the embodiment shown in FIG. 3 can be performed by the output power compensation device of the wind power generator shown in FIG. 4c, and the principle of the steps will not be described herein.
- the output power compensation device of the wind power generator provided by the embodiment of the present invention performs the above-mentioned method of FIG. 2a and FIG. 3 , and the technical effects achieved by the embodiment are related to the second embodiment and the third embodiment, and details are not described herein again.
- the embodiment further provides an output power compensation system for the wind power generator, comprising: a cluster controller 53 and a single machine control set on each wind power generator 51. 52; wherein:
- the stand-alone controller 52 includes:
- the single machine acquisition module 521 is configured to obtain a first ambient temperature average value of the environment in which the wind power generator is located in each cycle;
- the single-machine acquisition module 522 is configured to collect the output power of the unit corresponding to the wind turbine at the end of each cycle;
- the unitized compensation module 523 is configured to receive power compensation by the control of the cluster controller for the unit output power collected at the end time of the current period;
- the cluster controller 53 includes:
- the cluster obtaining module 531 is configured to obtain, from each stand-alone controller, an average value of a first ambient temperature of an environment in which the wind turbine is located in each cycle;
- the cluster collection module 532 is configured to collect, from each stand-alone controller, a unit output power corresponding to the wind turbine at the end time of each cycle;
- the cluster compensation module 533 is configured to: if the first ambient temperature average corresponding to each wind turbine in the current period and the first ambient temperature average in the previous period are greater than a preset temperature threshold corresponding to the corresponding wind turbine, The difference between the current ambient temperature of each wind turbine and the first ambient temperature average during the previous week controls the corresponding stand-alone controller to perform power compensation on the output power of the unit collected at the end of the current cycle to ensure the output of each unit.
- the power threshold is stable; the temperature threshold is a corresponding ambient temperature value of the wind power generator when the power of the grid is equal to the rated power in the full state.
- the single controller 52 may be specifically configured as a compensation system for controlling the operation of the wind turbine 51 on the wind turbine 51.
- the cluster controller 53 may be applied to the entire wind farm, and each of the wind farms
- the stand-alone controller 52 performs a master control system for adjustment control.
- FIG. 1, FIG. 2a and FIG. 3 can be implemented by using the output power compensation system of the wind power generator shown in this embodiment, and the principle of the steps is not described herein.
- the output power compensation system of the wind power generator provided by the embodiment can realize that all wind power generators in a wind farm respectively perform power compensation on the first output power value of the current time according to the personalized data of the unit, thereby improving the power consumption. Group control operability within the wind farm.
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Abstract
Description
Claims (11)
- 一种风力发电机组的输出功率补偿方法,其特征在于,包括:获取风力发电机组在各周期内所处环境的第一环境温度平均值;采集所述风力发电机组在各周期的结束时刻对应的机组输出功率;若当前周期内所述第一环境温度平均值和上一周期内所述第一环境温度平均值均大于预设的温度阈值,则根据当前周期内与其上一周期内所述第一环境温度平均值之间的差值对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿,以确保所述机组输出功率稳定;所述温度阈值为所述风力发电机组在满发状态下其上网功率等于额定功率时对应的环境温度值。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:获取所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率;根据所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率,计算所述风力发电机组在全年各月份的平均自身消耗功率,并通过曲线拟合构建满发状态下所述平均自身消耗功率的全年变化曲线;将所述风力发电机组在满发状态下全年各月份的平均机组输出功率通过曲线拟合构建满发状态下所述平均机组输出功率的全年变化曲线;提取所述平均机组输出功率的全年变化曲线对应减去所述平均自身消耗功率的全年变化曲线得到的差值等于额定功率的时间点作为特定时间点;获取满发状态下所述风力发电机组在全年各月份所处环境的第二环境温度平均值,并通过曲线拟合构建满发状态下所述第二环境温度平均值的全年变化曲线;根据所述第二环境温度平均值的全年变化曲线中,所述特定时间点对应的所述第二环境温度平均值确定所述温度阈值。
- 根据权利要求2所述的方法,其特征在于,所述获取所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率,包括:采集全年中各采样时刻对应的所述风力发电机组的机组输出功率、上网功率和环境风速值;将所述全年中各采样时刻采集的所述风力发电机组在满发状态下的机组输出功率、上网功率和环境风速值按月份进行统计,分别计算各月份所述机组输出功率、所述上网功率在不同环境风速段下对应的平均值;根据所述各月份所述机组输出功率、所述上网功率在不同环境风速段下对应的平均值,获取所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率。
- 根据权利要求3所述的方法,其特征在于,所述方法还包括:根据所述平均机组输出功率的全年变化曲线以及所述第二环境温度平均值的全年变化曲线,计算所述风力发电机组在满发状态下的机组输出功率随所述第二环境温度变化的变化率函数。
- 根据权利要求4所述的方法,其特征在于,所述根据当前周期内与其上一周期内所述第一环境温度平均值之间的差值对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿,包括:将所述当前周期内与其上一周期内所述第一环境温度平均值之间的差值代入所述变化率函数中,以获取所述差值对应的机组输出功率增量;将所述机组输出功率增量作为功率补偿量对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿。
- 一种风力发电机组的输出功率补偿装置,其特征在于,包括:第一获取模块,用于获取风力发电机组在各周期内所处环境的第一环境温度平均值;第一采集模块,用于采集所述风力发电机组在各周期的结束时刻对应的机组输出功率;补偿模块,用于若当前周期内所述第一环境温度平均值和上一周期内所述第一环境温度平均值均大于预设的温度阈值,则根据当前周期内与其上一周期内所述第一环境温度平均值之间的差值对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿,以确保所述机组输出功率稳定;所述温度阈值为所述风力发电机组在满发状态下其上网功率等于额定功率时对应的环境温度值。
- 根据权利要求6所述的装置,其特征在于,还包括:第二获取模块,用于获取所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率;第一处理模块,用于根据所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率,计算所述风力发电机组在全年各月份的平均自身消耗功率,并通过曲线拟合构建满发状态下所述平均自身消耗功率的全年变化曲线;第二处理模块,用于将所述风力发电机组在满发状态下全年各月份的平均机组输出功率通过曲线拟合构建满发状态下所述平均机组输出功率的全年变化曲线;提取模块,用于提取所述平均机组输出功率的全年变化曲线对应减去所述平均自身消耗功率的全年变化曲线得到的差值等于额定功率的时间点作为特定时间点;第三处理模块,用于获取满发状态下所述风力发电机组在全年各月份所处环境的第二环境温度平均值,并通过曲线拟合构建满发状态下所述第二环境温度平均值的全年变化曲线;确定模块,用于根据所述第二环境温度平均值的全年变化曲线中,所述特定时间点对应的所述第二环境温度平均值确定所述温度阈值。
- 根据权利要求7所述的装置,其特征在于,所述第二获取模块包括:采集单元,用于采集全年中各采样时刻对应的所述风力发电机组的机组输出功率、上网功率和环境风速值;第一处理单元,用于将所述全年中各采样时刻采集的所述风力发电机组在满发状态下的机组输出功率、上网功率和环境风速值按月份进行统计,分别计算各月份所述机组输出功率、所述上网功率在不同环境风速段下对应的平均值;第二处理单元,用于根据所述各月份所述机组输出功率、所述上网功率在不同环境风速段下对应的平均值,获取所述风力发电机组在满发状态下全年各月份的平均机组输出功率和平均上网功率。
- 根据权利要求8所述的装置,其特征在于,还包括:第四处理模块,用于根据所述平均机组输出功率的全年变化曲线以及所述第二环境温度平均值的全年变化曲线,计算所述风力发电机 组在满发状态下的机组输出功率随所述第二环境温度变化的变化率函数。
- 根据权利要求9所述的装置,其特征在于,所述补偿模块包括:第三处理单元,用于将所述当前周期内与其上一周期内所述第一环境温度平均值之间的差值代入所述变化率函数中,以获取所述差值对应的机组输出功率增量;补偿单元,用于将所述机组输出功率增量作为功率补偿量对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿。
- 一种风力发电机组的输出功率补偿系统,其特征在于,包括:集群控制器和设置在各所述风力发电机组上的单机控制器;所述单机控制器,包括:单机获取模块,用于获取风力发电机组在各周期内所处环境的第一环境温度平均值;单机采集模块,用于采集所述风力发电机组在各周期的结束时刻对应的机组输出功率;单机补偿模块,用于接受所述集群控制器的控制对当前周期的结束时刻采集的所述机组输出功率进行功率补偿;所述集群控制器,包括:集群获取模块,用于从各所述单机控制器上获取其所在风力发电机组在各周期内所处环境的第一环境温度平均值;集群采集模块,用于从各所述单机控制器上采集所述风力发电机组在各周期的结束时刻对应的机组输出功率;集群补偿模块,用于若当前周期内各所述风力发电机组对应的所述第一环境温度平均值和上一周期内所述第一环境温度平均值均大于相应所述风力发电机组对应的预设的温度阈值,则根据各所述风力发电机组当前周期内与其上一周期内所述第一环境温度平均值之间的差值控制相应所述单机控制器对所述当前周期的结束时刻采集的所述机组输出功率进行功率补偿,以确保各所述机组输出功率稳定;所述温度阈值为所述风力发电机组在满发状态下其上网功率等于额定功率时对应的环境温度值。
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ES15874994T ES2838684T3 (es) | 2014-12-30 | 2015-11-17 | Método, dispositivo y sistema para compensar la potencia de salida de conjunto generador de aerogenerador |
US15/539,429 US10190575B2 (en) | 2014-12-30 | 2015-11-17 | Method, device and system for compensating output power of wind turbine generator set |
KR1020177020332A KR101973881B1 (ko) | 2014-12-30 | 2015-11-17 | 윈드 터빈 발전기 세트의 출력 전력을 보상하기 위한 방법, 디바이스 및 시스템 |
AU2015374696A AU2015374696B2 (en) | 2014-12-30 | 2015-11-17 | Method, device and system for compensating output power of wind turbine generator set |
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