CN111835041A - Active power control method for wind power plant - Google Patents
Active power control method for wind power plant Download PDFInfo
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- CN111835041A CN111835041A CN202010807099.1A CN202010807099A CN111835041A CN 111835041 A CN111835041 A CN 111835041A CN 202010807099 A CN202010807099 A CN 202010807099A CN 111835041 A CN111835041 A CN 111835041A
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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
- H02J3/48—Controlling the sharing of the in-phase component
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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
- 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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Abstract
The invention belongs to the technical field of power control of wind power plants, and particularly relates to an active power control method of a wind power plant.A target value and an adjustable upper limit are received by an AGC system and compared, if the target value and the adjustable upper limit are larger than or equal to each other, a full-sending instruction is issued to a fan cluster; if the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant is less than the adjustable upper limit, a power instruction I is issued to the wind turbine cluster, the step is carried out in the next period, the instruction size is changed, the step is repeated for 5 times, and if the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant is still less than the adjustable upper limit, a full-sending instruction is issued to the wind; if the sum of the actual active power of the wind power plant and the installed capacity of the wind power plant is less than 5%, comparing the sum with the actual active power of the wind power plant, and if the sum is more than or equal to the actual active power of the wind power plant, issuing a power instruction II to the fan cluster; if the power is smaller than the preset power, issuing a power instruction III to the fan cluster; the AGC system determines to schedule the power limit and displays the "power limit". The method solves the problem of limited fan power caused by the defects of the AGC system power distribution method, and can be widely applied to various wind power plant places.
Description
Technical Field
The invention belongs to the technical field of power control of wind power plants, and particularly relates to an active power control method of a wind power plant.
Background
In the existing active power control technology of a wind power plant, a common method for an automatic generation control system (AGC system) to perform power distribution is to distribute fan load according to a predicted output value of a fan, and if the fan cannot reach the power distribution value, the AGC system reduces the load distribution of the fan, and increases the redundant load by a fan of which the other power distribution value is smaller than the actual power value. The power distribution scheme is intended to reasonably distribute power and distribute the power to the fan with strong power generation capacity as far as possible.
However, in actual operation, the power distribution scheme has a defect, and the AGC system will reduce the load of the fan whose actual power does not reach the power distributed by the AGC system until the distributed power is smaller than the actual power of the fan, which causes periodic power limitation of the AGC system to all the controlled fans, resulting in power loss.
When the active target value of the No. A fan of the wind power plant is periodically reduced, the active target value of the fan is the power distributed to the fan by the AGC system; the power allocated to it by the AGC system does not stop dropping until less than its actual power. However, in this week, the power of the typhoon fan is limited, which causes power loss, which is not an accidental phenomenon of a single wind turbine, and after long-time field data analysis, frequent power limitation of all wind turbines under the power distribution method causes frequent pitch retraction of the wind turbines, which causes a large amount of power loss. And at the moment, the target instruction issued to the wind power plant by the dispatching is larger than the actual power of the wind power plant, and the dispatching does not limit the power of the wind power plant.
Therefore, there is a need to improve upon the above problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an active power control method of a wind power plant, and the device can solve the problem that the power of a fan is limited due to the defects of the power distribution method of the existing AGC system.
The technical scheme adopted by the invention is as follows:
an active power control method for a wind power plant comprises the following steps:
s1, dispatching and issuing a target active value, receiving the target value by the AGC system, and comparing the target value with an adjustable upper limit in the AGC system;
s2, when the target value is larger than or equal to the adjustable upper limit, the AGC system issues a full-sending instruction to the fan cluster; when the target value is smaller than the adjustable upper limit, comparing the target value with the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant;
s3, when the target value in S2 is smaller than the adjustable upper limit and is larger than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, the AGC system issues a power instruction I to the wind power plant cluster to perform primary power control; when the target value is smaller than the sum of the actual active power of the wind power plant and 5% of installed capacity of the wind power plant, comparing the target value with the actual active power of the wind power plant;
s4, when the target value in the S3 is smaller than the sum of the actual active power of the wind power plant and 5% of installed capacity of the wind power plant, and the target value is larger than or equal to the actual active power of the wind power plant, the AGC system issues a power instruction II to the fan cluster; and when the target value is smaller than the actual active power of the wind power plant, the AGC system sends a power instruction III to the wind turbine cluster, the AGC system judges that the power is limited by scheduling, and the power limit is displayed in the system.
When the target value is greater than or equal to the adjustable upper limit in the step S2, the full-sending instruction sent by the AGC system to the fan is specifically that when the fan is controlled singly, the rated power of a single fan is sent; when the fans are controlled in a centralized manner, a cluster full-sending instruction is issued; and when the single control and the centralized control are mixed, full-emission instructions are respectively issued.
When the target value is greater than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant in the step S3, the AGC system issues a power instruction i to the wind turbine cluster, where the wind speed values of all the wind turbines at this time correspond to the power values on the theoretical curve.
The power control in the power instruction I is specifically that when the fans are controlled in a centralized mode, a total value is issued after cluster accumulation is carried out, and when the fans are controlled in a single mode, the total value is issued directly.
When the next operation cycle reaches the first power control in step S3 again, the instruction size is changed and the operation is repeated 5 times.
And the instruction size of the first power control in the next operating period is changed into the sum of the power value of the fan on the theoretical curve and the difference value between the target value and the actual value in the previous period.
And when the actual power is still less than the target power after the operation is repeated for five times, issuing a full-sending instruction to the fan cluster.
In step S4, when the target value is greater than or equal to the actual active power of the wind farm, the AGC system issues a power instruction ii to the wind turbine cluster, where the power instruction ii corresponds to a power value on the theoretical curve according to the wind speed values of all the wind turbines at that time.
In step S4, when the target value is smaller than the actual active power of the wind farm, the AGC system issues a power command iii to the wind farm as the target value.
Compared with the prior art, the invention has the following beneficial effects:
the invention can solve the problem that the power of the fan is limited periodically under the original distribution method of the AGC system, and can reduce the electric quantity loss caused by the limitation. The power distribution method flexibly distributes the power values according to different power instructions issued by scheduling, can thoroughly solve the problem that the power distribution value is reduced and further the power is limited because the fan cannot reach the power distribution value, and effectively improves the power of the fan. Meanwhile, the problem that the actual power of the wind power plant is larger than the target value due to overlarge power distribution is avoided, and the problem of low AGC qualification rate is also avoided.
Drawings
Fig. 1 is a power control flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a method for controlling active power of a wind farm includes the following steps:
and dispatching and issuing a target power value, wherein the AGC system receives the target value, the target value is an instruction for receiving and dispatching an AGC main station by an AGC substation of the wind power plant, the instruction period is generally one minute, and the target instruction issued by the main station to the substation is a power instruction which requires the power value sent by the wind power plant in the period for dispatching.
The target value is firstly compared with an adjustable upper limit in an AGC system, the adjustable upper limit in the AGC system is the upper limit of the adjusting power value of the system, and the value is generally set as the installed capacity of the wind power plant, for example, a wind power plant has two stages of fans, 24 fans with 2.0MW in one stage, and the capacity is 48 MW; 33 fans of 1.5MW in the first period, and the capacity is 49.5 MW; the installed capacity of the wind farm is 97.5MW, and the adjustable upper limit of the wind farm is set to 97.5 MW; the adjustable upper limit is the power of all the fans of a wind power plant when the fans are fully started.
If the target value is greater than or equal to the adjustable upper limit, the AGC system sends a full-sending instruction to the fan cluster, wherein the full-sending instruction is specifically that when the fan is controlled singly, the rated power of a single fan is sent; when the fans are controlled in a centralized manner, a cluster full-sending instruction is issued; and when the single control and the centralized control are mixed, full-emission instructions are respectively issued. The full-load power distribution instruction is a full-load power distribution instruction issued by the AGC system to the controlled fan or fan cluster. If a full sending instruction is sent to a single fan, the size of the instruction is the rated capacity of the fan; and if the full sending instruction is sent to the fan cluster, the sum of the rated capacities of the fans in the cluster is obtained. The phenomenon is a method for scheduling to control the constant power without limiting the power of the wind power plant. And scheduling a power value which cannot be sent to the wind power plant, and enabling the wind power plant to generate power freely, wherein if the load is distributed to each fan in the past, and if the actual power of the fan cannot reach the fan power distribution value in one period, the method for reducing the distributed power of the fan can periodically cause the power of the fan to be limited. At the moment, the power distribution method distributes the full load instruction to the wind power station, so that the wind power station freely generates power, the problem of power limitation caused by the problem of power distribution of an AGC system is avoided, and the power value distributed in a scheduling mode is larger than the adjustable upper limit of the AGC system, so that the problem that the actual function rate of the wind power station exceeds the target value is solved.
And if the target value is smaller than the adjustable upper limit, comparing the target value with the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant. The actual active power of the wind power plant is the total power value of the wind power plant at the moment, the data is the data transmitted to the AGC system by the wind power plant monitoring system, and the data transmission aims to enable the AGC system to know the actual power value of the wind power plant and provide a judgment basis for how to issue a power instruction to a controlled fan or a fan cluster after receiving a scheduling instruction.
If the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant is compared, and the target value is larger than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, the AGC system issues a power instruction I to the fan cluster, the instruction size is that the total value is issued after the cluster accumulation is performed according to the wind speed values of all the fans corresponding to the power values on the theoretical curve at the moment, such as fan centralized control, and if fan single control is performed, the power control is the first power control. The theoretical power curve is a fan wind speed power curve set in the AGC system according to the actual power generation condition of the fan, and is matched with the predicted wind speed transmitted to the AGC system by the wind power plant to predict the power which the fan will reach, so that a basis is provided for power distribution. If the power of the wind power plant is not limited by scheduling, two methods for controlling the wind power generation power are generally used, namely constant power control and real-time power control; the constant power control generally comprises the steps of dispatching and sending a power value larger than an adjustable upper limit to a wind power plant; and according to the real-time power control, issuing a numerical value larger than the power value of the wind power plant for scheduling according to the power value of the wind power plant at the moment. The difference value between the power value issued by scheduling and the actual power value of the wind power plant is a scheduling step length, the general data of the maximum scheduling step length is generally set to be 10% of the installed capacity of the wind power plant, the purpose of setting the scheduling step length is to enable the scheduling instruction to be larger than the actual power value of the wind power plant and larger than a safety interval, and the problem that the actual power of the wind power plant is larger than the scheduled issued power and the power of the wind power plant is limited due to the fact that the wind speed of the wind power plant is suddenly increased in. The installed capacity of the 5% wind farm in the invention is data verified after field operation, and is not limited to 5%, and any setting can be used as long as the setting is smaller than the maximum scheduling adjustment step length (generally 10% of the installed capacity of the wind farm). Because the regulating step length of each instruction is not necessarily the maximum regulating step length and is changed data, the invention sets a data smaller than the maximum regulating step length to adapt to a scheduling unlimited control mode according to real-time power control. And at the moment, the dispatching does not limit the power to the wind power plant, and when the target value is more than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, the AGC system sends a power instruction to the fan or the fan cluster according to the theoretical power curve and the wind speed at the moment and judges. The power distribution value of the fan with actual power not reaching the distribution power is not reduced, the sum of the power value of the fan with the distributed wind speed value corresponding to the theoretical curve and the difference value between the previous target value and the actual value is changed, and the purpose is to increase the power value distributed by the fan, enable the fan to generate power freely and avoid power limitation. The purpose of the judgment of the target value being greater than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant is to see whether the difference value between the target value and the actual power of the wind power plant is large enough, and if the difference value meets the condition, the AGC system can increase the power distributed by the wind turbine so that the power of the wind power plant is not greater than the target value after the power is increased.
And when the next operating period reaches the first power control again, the instruction size is changed into the sum of the power value of the wind speed of the wind turbine corresponding to the difference value of the power value of the wind turbine on the theoretical curve and the target value and the actual value of the previous period, and the target value is more than or equal to the sum of the actual active power of the wind power plant and 5% of the installed capacity of the wind power plant, and the AGC system sends a power instruction to the wind turbine or the wind turbine cluster according to the theoretical power curve and the wind speed at the moment and judges the. The power distribution value of the fan with actual power not reaching the distribution power is not reduced, the problem that the power of the fan is limited because the distribution value is always reduced is avoided, and the sum of the power value of the fan with the wind speed value corresponding to the distribution value on the theoretical curve and the difference between the previous target value and the actual value is changed. The aim is to gradually and slowly increase the power value distributed by the typhoon machine, so that the typhoon machine can freely generate electricity and avoid power limitation. The power distribution value is not too large, and the problem that the actual power of the wind power plant is larger than the target value due to sudden increase of the wind speed is solved. The sum of the difference value of the target value and the actual value in the previous period is only set for the power test of the wind power plant, and the effect is good. The purpose of this setting is only to not reduce the fan power distribution, as long as the increase value is reasonable, not increase too much. The above steps are repeated for 5 times, and the increase is repeated for 5 times, only to gradually and smoothly increase the power of the wind turbine of which the actual power does not reach the power distribution value, and the power is a set value with a good effect after the wind farm is operated on site, and the power is not limited to 5 times only as long as the power is smoothly increased. If the actual power is still smaller than the target power, a full-sending instruction is sent to the fan cluster, and after the full-sending instruction is increased for 5 times, if the actual power of the fan does not reach the distribution value, the full-sending instruction is directly sent to the fan cluster, so that the fan cluster is free to generate power without repeated calculation. And at the moment, the target value is more than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, the actual power of the wind power plant and the scheduling target value have enough redundancy, the situation that the actual active power is more than the scheduling instruction cannot occur, and the instruction can be sent to the lower part of the wind turbine fully.
If the target value is smaller than the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, comparing the target value with the actual active power of the wind power plant, if the target value is larger than or equal to the actual active power of the wind power plant, sending a power instruction II to the wind turbine cluster by the AGC system, wherein the instruction size is a power value corresponding to the theoretical curve according to the wind speed values of all the wind turbines at the moment, because the scheduling target value is smaller than the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant at the moment, the difference value between the actual. On-site operation finds that the power distribution value of the fan is increased, the problem that the actual power of the wind power plant is larger than a target value can occur, so the power value of the wind power plant is distributed according to the wind speed value of all the fans corresponding to the power value of the fan on the theoretical curve at the moment, if the power value of the fan does not reach the distribution value, the distribution value is not reduced, and the wind power plant is distributed again according to the predicted value of the next period.
If the target value is smaller than the actual active power of the wind power plant, the AGC system sends a power instruction III to the wind turbine cluster, the instruction is the target value, if the target instruction sent to the AGC system in a scheduling mode is smaller than the actual active power of the wind power plant at the moment, the power instruction sent to the wind power plant in the scheduling mode is an instruction for limiting the power of the wind power plant, the AGC system is distributed to the wind turbines or the wind turbine cluster according to the target value at the moment, and the condition that the power of the wind power plant is larger than the target value and the control qualification; at the moment, the AGC system judges that the power is limited in scheduling, and displays power limitation in the system, wherein the power limitation in scheduling means that the power instruction value of the wind power plant sent by scheduling is smaller than the actual power value of the wind power plant at the moment, namely the wind power plant is scheduled to be limited in power, and the AGC system judges that the power is limited in scheduling, and displays 'power limitation' in the system: the function of reminding is that the scheduling of wind power plant operation personnel is carrying out power limitation.
Example (b):
one wind power plant is provided with two-stage fans, 24 2.0MW fans in one stage, the capacity is 48MW, and the wind power plant is controlled in a cluster manner; 33 fans of 1.5MW in the first period, the capacity is 49.5MW, and the fans are controlled by one unit. The installed capacity of the wind farm is 97.5MW, the adjustable upper limit of the wind farm is set to 97.5MW, the 5% installed capacity is about 5MW, and the actual active power of the wind farm is 60 MW.
If the scheduled target instruction is 100MW, the scheduled target value is greater than or equal to the adjustable upper limit of the AGC system of 97.5MW, the AGC system sends a full instruction to the fans, and 24 centralized control fans obtain a power distribution value of 48 MW; 33 single-control 1.5MW fans, and the power distribution value of each fan is 1.5 MW.
If the scheduled target instruction is 70 MW, the target instruction is smaller than the adjustable upper limit 97.5MW and is larger than or equal to the sum (65 MW) of the actual active power (60 MW) of the wind power plant and the installed capacity (5 MW) of the 5% wind power plant, the AGC system issues a power instruction to the fan cluster, and the instruction is a power value corresponding to the theoretical curve according to the wind speed values of all the fans at the moment. If the fan is centrally controlled, the total value is issued after the cluster accumulation is carried out, and if the fan is singly controlled, the total value is directly issued. The step is carried out in the next period, the instruction size is changed into the sum of the wind speed value of the fan corresponding to the power value of the fan on the theoretical curve and the difference value of the target value and the actual value in the previous period, and the steps are repeated for 5 times. And if the actual power is still smaller than the target power, issuing a full-sending instruction to the fan cluster.
If the scheduled target instruction is 62MW, the target instruction is smaller than the adjustable upper limit 97.5MW, and is larger than or equal to the sum (65 MW) of the actual active power (60 MW) of the wind power plant and the installed capacity (5 MW) of the 5% wind power plant, but is larger than the actual active power 60MW, the AGC system issues a power instruction to the fan cluster, and the instruction size is a power value corresponding to the theoretical curve according to the wind speed values of all the fans at the moment.
And if the scheduled target instruction is 50MW and the target instruction is smaller than the actual active power of the wind power plant by 60MW at the moment, the AGC system issues a 50MW power instruction to the wind turbine cluster, the AGC system judges that the power is scheduled and limited, and the power is displayed on the system to be limited.
The power distribution method flexibly distributes the power values according to different power instructions issued by scheduling, can thoroughly solve the problem that the power distribution value is reduced and further the power is limited because the fan cannot reach the power distribution value, effectively improves the power of the fan, and simultaneously avoids the problem that the actual power of the wind power plant is larger than the target value because the power distribution is overlarge.
Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.
Claims (9)
1. An active power control method of a wind power plant is characterized in that: the method comprises the following steps:
s1, dispatching and issuing a target active value, receiving the target value by the AGC system, and comparing the target value with an adjustable upper limit in the AGC system;
s2, when the target value is larger than or equal to the adjustable upper limit, the AGC system issues a full-sending instruction to the fan cluster; when the target value is smaller than the adjustable upper limit, comparing the target value with the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant;
s3, when the target value in S2 is smaller than the adjustable upper limit and is larger than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant, the AGC system issues a power instruction I to the wind power plant cluster to perform primary power control; when the target value is smaller than the sum of the actual active power of the wind power plant and 5% of installed capacity of the wind power plant, comparing the target value with the actual active power of the wind power plant;
s4, when the target value in the S3 is smaller than the sum of the actual active power of the wind power plant and 5% of installed capacity of the wind power plant, and the target value is larger than or equal to the actual active power of the wind power plant, the AGC system issues a power instruction II to the fan cluster; and when the target value is smaller than the actual active power of the wind power plant, the AGC system sends a power instruction III to the wind turbine cluster, the AGC system judges that the power is limited by scheduling, and the power limit is displayed in the system.
2. The active power control method for a wind farm according to claim 1, characterized in that: when the target value is greater than or equal to the adjustable upper limit in the step S2, the full-sending instruction sent by the AGC system to the fan is specifically that when the fan is controlled singly, the rated power of a single fan is sent; when the fans are controlled in a centralized manner, a cluster full-sending instruction is issued; and when the single control and the centralized control are mixed, full-emission instructions are respectively issued.
3. The active power control method for a wind farm according to claim 1, characterized in that: when the target value is greater than or equal to the sum of the actual active power of the wind power plant and the installed capacity of the 5% wind power plant in the step S3, the AGC system issues a power instruction i to the wind turbine cluster, where the wind speed values of all the wind turbines at this time correspond to the power values on the theoretical curve.
4. The active power control method for a wind farm according to claim 3, characterized in that: the power control in the power instruction I is specifically that when the fans are controlled in a centralized mode, a total value is issued after cluster accumulation is carried out, and when the fans are controlled in a single mode, the total value is issued directly.
5. Active power control method of a wind farm according to claim 1 or 3, characterized in that: when the next operation cycle reaches the first power control in step S3 again, the instruction size is changed and the operation is repeated 5 times.
6. The active power control method for a wind farm according to claim 5, characterized in that: and the instruction size of the first power control in the next operating period is changed into the sum of the power value of the fan on the theoretical curve and the difference value between the target value and the actual value in the previous period.
7. The active power control method for a wind farm according to claim 5, characterized in that: and when the actual power is still less than the target power after the operation is repeated for five times, issuing a full-sending instruction to the fan cluster.
8. The active power control method for a wind farm according to claim 1, characterized in that: in step S4, when the target value is greater than or equal to the actual active power of the wind farm, the AGC system issues a power instruction ii to the wind turbine cluster, where the power instruction ii corresponds to a power value on the theoretical curve according to the wind speed values of all the wind turbines at that time.
9. The active power control method for a wind farm according to claim 1, characterized in that: in step S4, when the target value is smaller than the actual active power of the wind farm, the AGC system issues a power command iii to the wind farm as the target value.
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| CN113642194A (en) * | 2021-09-01 | 2021-11-12 | 中国船舶重工集团海装风电股份有限公司 | Wind generating set adjustable upper limit calculation method and active power scheduling method |
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