CN109617136B - Method for adjusting output power of wind power plant - Google Patents
Method for adjusting output power of wind power plant Download PDFInfo
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- CN109617136B CN109617136B CN201811653511.8A CN201811653511A CN109617136B CN 109617136 B CN109617136 B CN 109617136B CN 201811653511 A CN201811653511 A CN 201811653511A CN 109617136 B CN109617136 B CN 109617136B
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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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Abstract
The invention provides a method for adjusting output power of a wind power plant, which comprises the following steps: s1) acquiring a first power output value output by an inherent wind power plant; s2) acquiring a second power output value output by the whole wind power plant after the newly added fan is added; s3) comparing the second power output value with the first power output value to determine an adjustment coefficient; and S4) adjusting the power value output by the wind power plant according to the adjustment coefficient. According to the invention, the stability of the wind power plant is improved by controlling the output power of the wind power plant.
Description
Technical Field
The invention belongs to the technical field of power supply and distribution, and particularly relates to a method for adjusting output power of a wind power plant.
Background
In the prior art, wind power plants are widely applied, the utilization of wind power plants for power generation is a very effective way of fully utilizing clean energy, and easily-consumed energy is saved, then, along with the popularization of wind power plants and the defects of the original fan application technology, the layout of fans is insufficient, or the layout of fans cannot well meet the requirement of output power of the wind power plants, meanwhile, along with the use time of the fans, the fans have insufficient power generation power, the device loss causes that the original output power of the fans cannot be met, the fans of the wind power plants need to be replaced or expanded in the later period, then, because the fans can utilize the clean energy for power generation, the output power cannot be well controlled, the expansion or replacement of the fans easily causes that the output power of the wind power plants cannot meet the requirement of loads, how to control the replacement of the fans or the accurate control of the positions or the quantity of the fans after the expansion, and the accurate control of the output of the fans meet the load, which is a difficult problem of power output required to be solved for maintaining the wind power plants in the future.
Content of application
In order to solve the technical problems: the invention provides a method for adjusting output power of a wind power plant, which comprises the following steps:
s1) acquiring a first power output value output by an inherent wind power plant;
s2) acquiring a second power output value output by the whole wind power plant after the newly added fan is added;
s3) comparing the second power output value with the first power output value to determine an adjustment coefficient;
and S4) adjusting the power value output by the wind power plant according to the adjustment coefficient.
In the method, the step S1) includes the following steps:
s11) detecting the output power Pi of the single fan when the wind speed Vi is stable, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Ci of the single fan according to the detected parameters,
s12) calculating the average electric energy coefficient C1 of the n fans,
s13) calculating the average output power P1 of the fan,
s14) detecting the duration time ti of the wind speed, acquiring the whole duration time T of the wind speed, calculating the frequency fi of the wind speed,
s15) calculating a first power output value Etotal of the inherent wind farm output based on the wind speed continuous frequency fi determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and n is the number of fans of the inherent wind power plant.
In the method, the step S2) includes the following steps:
s21) detecting the axial force F of the fan in the wind power plant when the single fan is at a stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Cj of the single fan according to the detected parameters,
s22) solving the average electric energy coefficient C2 of the m fans,
s23) calculating the average output power P2 of the fan,
s24) detecting the wind speed duration tji, acquiring the whole duration T1 of the wind speed, calculating the frequency fj of the wind speed duration,
s25) calculating a second power output value E2total of the inherent wind farm output based on the wind speed continuous frequency fj determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and m is the number of fans of the whole wind power plant after the fans are newly added.
In the method, the step S3) includes the following steps:
calculating a second output power value E 2total And a first output power value E total Comparing the difference with a first preset threshold and a second preset threshold, wherein the first preset threshold is smaller than the second preset threshold, and outputting a corresponding first adjustment coefficient, a second adjustment coefficient and a third adjustment coefficient according to the comparison result.
In the method, the step S4) includes the following steps:
if the difference is smaller than a first preset threshold value, according to a second output power value E 2total Outputting a power value, and outputting a first adjustment coefficient, wherein the first adjustment coefficient is an average electric energy coefficient C1 for maintaining the current fan to execute the fan;
if the difference value is between a first preset threshold value and a second preset threshold value, a part of power output value is required to be reduced, and a second adjusting coefficient is output, wherein the second adjusting coefficient is obtained by multiplying the first adjusting coefficient by a reduction coefficient;
if the difference exceeds the second preset threshold, outputting a third adjustment coefficient, wherein the third adjustment coefficient is used for resetting the electric energy coefficient C3 of the whole wind power plant after the newly increased fan,
controlling the output power E of the fans of the whole wind power plant according to the step S2) and the electric energy coefficient C3 3total Comparing the output power E of the fan 3total And a first output power value E total Comparing the difference with a first preset threshold value again, and if the difference exceeds a second preset threshold value, solving for E 3total And E 2total The ratio of (a) is obtained by dividing the frequency of the fan access by the ratio and then controlling the output power E of the fan 4total As an output power value.
The invention can control the power after controlling the newly added fan in the wind power plant, output various adaptive adjustment coefficients by comparing the output power of the fan in the newly added wind power plant with the output power of the inherent wind power plant, and adjust the output power of the new wind power plant.
Drawings
FIG. 1 is a schematic diagram of a method of regulating output power of a wind farm in accordance with the present invention.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
FIG. 1 is a schematic diagram of a method of regulating output power of a wind farm in accordance with the present invention. The method comprises the following steps:
s1) acquiring a first power output value output by an inherent wind power plant;
s2) acquiring a second power output value output by the whole wind power plant after the newly added fan is added;
s3) comparing the second power output value with the first power output value, and determining an adjustment coefficient;
and S4) adjusting the power value output by the wind power plant according to the adjustment coefficient.
In the method, the step S1) includes the following steps:
s11) detecting the output power Pi of the single fan at the stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Ci of the single fan according to the detected parameters,
s12) calculating the average electric energy coefficient C1 of the n fans,
s13) obtaining the average output power P1 of the fan,
s14) detecting the duration time ti of the wind speed, acquiring the whole duration time T of the wind speed, calculating the frequency fi of the wind speed,
s15) calculating a first power output value Etotal of the inherent wind farm output based on the wind speed continuous frequency fi determined in the step S14),
the method comprises the following steps of A, K, n and N, wherein A is a wind speed influence factor in a determined time period, K is a wind power plant terrain influence factor, and n is the number of fans of an inherent wind power plant.
In the method, the step S2) includes the following steps:
s21) detecting the axial force F of the fan in the wind power plant when the single fan is at a stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Cj of the single fan according to the detected parameters,
s22) solving the average electric energy coefficient C2 of the m fans,
s23) calculating the average output power P2 of the fan,
s24) detecting the wind speed duration tji, acquiring the whole duration T1 of the wind speed, calculating the frequency fj of the wind speed duration,
s25) calculating a second power output value E2total of the inherent wind farm output based on the wind speed continuous frequency fj determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and m is the number of fans of the whole wind power plant after the fans are newly added.
In the method, the step S3) includes the following steps:
calculating a second output power value E 2total And a first output power value E total Comparing the difference with a first preset threshold and a second preset threshold, wherein the first preset threshold is smaller than the second preset threshold, and outputting a corresponding first adjustment coefficient, a second adjustment coefficient and a third adjustment coefficient according to the comparison result.
In the method, the step S4) includes the following steps:
if the difference is smaller than a first preset threshold value, according to a second output power value E 2total Outputting a power value, and outputting a first adjustment coefficient, wherein the first adjustment coefficient is the average value of the fan which is maintained to be executed by the current fanThe average electric energy coefficient C1;
if the difference value is between a first preset threshold value and a second preset threshold value, a part of power output value is required to be reduced, and a second adjusting coefficient is output, wherein the second adjusting coefficient is obtained by multiplying the first adjusting coefficient by a reduction coefficient;
if the difference exceeds the second preset threshold, outputting a third adjustment coefficient, wherein the third adjustment coefficient is used for resetting the electric energy coefficient C3 of the whole wind power plant after the newly increased fan,
controlling the output power E of the fans of the whole wind power plant according to the step S2) and the electric energy coefficient C3 3total Comparing the output power E of the fan 3total And a first output power value E total Comparing the difference with a first preset threshold value again, and if the difference exceeds a second preset threshold value, solving for E 3total And E 2total The ratio of (a) is obtained by dividing the frequency of the fan access by the ratio and then controlling the output power E of the fan 4total As an output power value.
Example two:
a computer readable storage medium comprising a first executable program for adjusting wind farm output power, comprising the steps of:
s1) acquiring a first power output value output by an inherent wind power plant;
s2) acquiring a second power output value output by the whole wind power plant after the newly added fan is added;
s3) comparing the second power output value with the first power output value to determine an adjustment coefficient;
and S4) adjusting the power value output by the wind power plant according to the adjustment coefficient.
The adjusted power value output by the wind power plant can be detected through a voltage transformer and a current transformer at a grid-connected position, and is transmitted to the readable storage medium through detection data, wherein the readable storage medium comprises a second execution program, and the second execution program is used for calculating the power value according to the detection results of the voltage transformer and the current transformer.
The readable storage medium, the step S1) includes the steps of:
s11) detecting the output power Pi of the single fan when the wind speed Vi is stable, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Ci of the single fan according to the detected parameters,
s12) calculating the average electric energy coefficient C1 of the n fans,
s13) obtaining the average output power P1 of the fan,
s14) detecting the duration time ti of the wind speed, acquiring the whole duration time T of the wind speed, calculating the frequency fi of the wind speed,
s15) calculating a first power output value Etotal of the inherent wind farm output based on the wind speed continuous frequency fi determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and n is the number of fans of the inherent wind power plant.
The readable storage medium, the step S2) includes the following steps:
s21) detecting the axial force F of the fan in the wind power plant when the single fan is at a stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Cj of the single fan according to the detected parameters,
s22) solving the average electric energy coefficient C2 of the m fans,
s23) calculating the average output power P2 of the fan,
s24) detecting the wind speed duration tji, acquiring the whole duration T1 of the wind speed, calculating the frequency fj of the wind speed duration,
s25) calculating a second power output value E2total of the inherent wind farm output based on the wind speed continuous frequency fj determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and m is the number of fans of the whole wind power plant after the fans are newly added.
The readable storage medium, the step S3) includes the following steps:
calculating a second output power value E 2total And a first output power value E total Comparing the difference with a first preset threshold and a second preset threshold, wherein the first preset threshold is smaller than the second preset threshold, and outputting a corresponding first adjustment coefficient, a second adjustment coefficient and a third adjustment coefficient according to the comparison result.
In the method, the step S4) includes the following steps:
if the difference is smaller than a first preset threshold value, according to a second output power value E 2total Outputting a power value, and outputting a first adjustment coefficient, wherein the first adjustment coefficient is an average electric energy coefficient C1 for maintaining the current fan to execute the fan;
if the difference value is between a first preset threshold value and a second preset threshold value, a part of power output value is required to be reduced, and a second adjusting coefficient is output, wherein the second adjusting coefficient is obtained by multiplying the first adjusting coefficient by a reduction coefficient;
if the difference exceeds the second preset threshold, outputting a third adjustment coefficient, wherein the third adjustment coefficient is used for resetting the electric energy coefficient C3 of the whole wind power plant after the newly increased fan,
controlling the output power E of the fans of the whole wind power plant according to the step S2) and the electric energy coefficient C3 3total Comparing the output power E of the fan 3total And a first output power value E total Comparing the difference with a first preset threshold value again, and if the difference exceeds a second preset threshold value, solving for E 3total And E 2total Ratio of (d), frequency of fan accessDividing by the ratio, and controlling the output power E of the fan 4total As an output power value.
The readable storage medium includes a third execution program for performing a comparison determination on the number of times the difference is calculated and compared with a threshold value, and an adjustment number of times performed according to a result of the comparison.
The wind power plant control method can be applied to the output power control of a single fan and also can be applied to a wind power plant formed by a plurality of fans, the control output is performed according to the same mode by coordinating the electric energy output coefficients of the plurality of fans, the control mode of the whole control system of the wind power plant is simple, the control program of the control system is optimized, the control efficiency is improved, meanwhile, each fan performs power output according to the wind power received by the fan, and the wind power can be utilized to the maximum extent while the control program is optimized.
The invention can control the power after controlling the newly added fan in the wind power plant, output various adaptive adjustment coefficients by comparing the output power of the fan in the newly added wind power plant with the output power of the inherent wind power plant, and adjust the output power of the new wind power plant.
Claims (1)
1. A method for adjusting output power of a wind power plant is characterized by comprising the following steps:
s1) acquiring a first power output value output by an inherent wind power plant;
s2) acquiring a second power output value output by the whole wind power plant after the newly added fan is added;
s3) comparing the second power output value with the first power output value to determine an adjustment coefficient;
s4) adjusting the power value output by the wind power plant according to the adjustment coefficient;
s11) detecting the output power Pi of the single fan at the stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Ci of the single fan according to the detected parameters,
s12) calculating the average electric energy coefficient C1 of the n fans,
s13) obtaining the average output power P1 of the fan,
s14) detecting the duration time ti of the wind speed, acquiring the whole duration time T of the wind speed, calculating the frequency fi of the wind speed,
s15) calculating a first power output value Etotal of the inherent wind farm output based on the wind speed continuous frequency fi determined in the step S14),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of a wind power plant, and n is the number of fans of the inherent wind power plant; the step S2) comprises the following steps:
s21) detecting the axial force F of the fan in the wind power plant when the single fan is at a stable wind speed Vi, detecting the equivalent resistance Ri of the corresponding fan, calculating the electric energy coefficient Cj of the single fan according to the detected parameters,
s22) solving the average electric energy coefficient C2 of the m fans,
s23) calculating the average output power P2 of the fan,
s24) detecting the duration time tj of the wind speed, acquiring the whole duration time T1 of the wind speed, calculating the frequency fj of the wind speed duration,
s25) calculating a second power output value E2total of the inherent wind farm output based on the wind speed continuous frequency fj determined in the step S24),
a is a wind speed influence factor in a determined time period, K is a terrain influence factor of the wind power plant, and m is the number of fans of the whole wind power plant after the fans are newly added; the step S3) comprises the following steps:
calculating a second output power value E 2total And a first output power value E total Comparing the difference with a first preset threshold and a second preset threshold, wherein the first preset threshold is smaller than the second preset threshold, and outputting a corresponding first adjustment coefficient, a second adjustment coefficient and a third adjustment coefficient according to the comparison result; the step S4) comprises the following steps:
if the difference is smaller than a first preset threshold value, according to a second output power value E 2total Outputting a power value, and outputting a first adjustment coefficient, wherein the first adjustment coefficient is an average electric energy coefficient C2 for maintaining the current fan to execute the fan;
if the difference value is between a first preset threshold value and a second preset threshold value, a part of power output value is required to be reduced, and a second adjusting coefficient is output, wherein the second adjusting coefficient is obtained by multiplying the first adjusting coefficient by a reduction coefficient;
if the difference exceeds the second preset threshold, outputting a third adjustment coefficient, wherein the third adjustment coefficient is used for resetting the electric energy coefficient C3 of the whole wind power plant after the newly increased fan,
controlling the output power E of the fans of the whole wind power plant according to the step S2) and the electric energy coefficient C3 3total Comparing the output power E of the fan 3total And a first output power value E total Comparing the difference with a first preset threshold value again, and if the difference exceeds the first preset threshold value, solving for E 3total And E 2total The ratio of (a) is obtained by dividing the frequency of the fan access by the ratio and then controlling the output power E of the fan 4total As an output power value.
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