CN117175707A - Offshore wind power sending control method, system, equipment and medium - Google Patents
Offshore wind power sending control method, system, equipment and medium Download PDFInfo
- Publication number
- CN117175707A CN117175707A CN202311119910.7A CN202311119910A CN117175707A CN 117175707 A CN117175707 A CN 117175707A CN 202311119910 A CN202311119910 A CN 202311119910A CN 117175707 A CN117175707 A CN 117175707A
- Authority
- CN
- China
- Prior art keywords
- voltage
- offshore
- initial
- converter
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- 238000004590 computer program Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 241001672018 Cercomela melanura Species 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a method, a system, equipment and a medium for controlling offshore wind power transmission, and relates to the technical field of offshore wind power transmission. And generating a target system voltage by carrying out data adjustment according to the voltage data and a preset voltage threshold value. Based on the target system voltage, the initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set is adjusted through the matrix type modularized multi-level converter, and the target offshore alternating voltage amplitude is generated. And when receiving the target offshore alternating voltage amplitude, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data. Based on the operation data of the offshore wind farm, system parameter adjustment is carried out through a diode modular multilevel converter, and offshore wind power transmission data are generated. The diode modularized multi-level converter and the matrix modularized multi-level converter are matched for use, so that the conveying distance of the submarine cable is increased, and the requirements of medium-distance and long-distance offshore wind power economic delivery and efficient collection can be met.
Description
Technical Field
The invention relates to the technical field of offshore wind power transmission, in particular to a method, a system, equipment and a medium for controlling offshore wind power transmission.
Background
When offshore wind farms are small in scale and close to shore, 50Hz high voltage ac is typically used to access the land grid. However, the 50Hz high-voltage AC transmission grid-connected mode cannot carry out long-distance transmission under the influence of the cable capacitance current.
In recent years, flexible direct current transmission technology has been rapidly developed. Meanwhile, the output power of the wind power plant can be rapidly and flexibly controlled due to the flexible direct current, and the bus voltage and the frequency of the grid-connected point of the wind power plant can be independently controlled. Aiming at the large-capacity offshore wind farm with the speed of more than 80km, the MMC flexible direct current transmission technology adopting a multistage boosting and converting mode is adopted in the current operation or construction engineering at home and abroad.
However, with the increase of offshore wind power transmission scale, the volume and weight of the offshore platform converter station based on MMC are greatly increased, and the construction difficulty and cost of engineering are greatly increased. And offshore converter stations are far away from the shore, so that the equipment operation and maintenance are difficult and the cost is high. The offshore wind power output control method is complex in operation and high in operation and maintenance cost, is unfavorable for large-scale development of offshore wind power, and has poor adaptability.
Disclosure of Invention
The invention provides a method, a system, equipment and a medium for controlling offshore wind power output, which solve the technical problems of complex operation, high operation and maintenance cost, and poor adaptability of the existing offshore wind power output control method, which are not beneficial to large-scale development of offshore wind power.
The invention provides a control method for offshore wind power transmission, which is applied to a flexible low-frequency alternating current transmission system of offshore wind power, wherein the flexible low-frequency alternating current transmission system of offshore wind power comprises a land current conversion station, and the land current conversion station comprises a diode modularized multi-level converter and a matrix modularized multi-level converter; the method comprises the following steps:
acquiring voltage data, converter valve capacity and system single-unit fan capacity corresponding to the offshore wind power through a flexible low-frequency alternating current transmission system;
carrying out wind turbine starting division by adopting the converter valve capacity and the capacity of a single wind turbine of the system, and determining a first wind turbine starting set and a second wind turbine starting set;
performing data adjustment according to the voltage data and a preset voltage threshold value to generate a target system voltage;
based on the target system voltage, adjusting an initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set through the matrix type modularized multi-level converter to generate a target offshore alternating voltage amplitude;
When the target offshore alternating voltage amplitude is received, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data;
and based on the operation data of the offshore wind farm, performing system parameter adjustment through the diode modularized multi-level converter to generate offshore wind power transmission data.
Optionally, the voltage data includes an initial direct current voltage and an initial system voltage; the preset voltage threshold comprises a first voltage threshold and a second voltage threshold; the step of generating the target system voltage by performing data adjustment according to the voltage data and a preset voltage threshold value comprises the following steps:
comparing the initial direct current voltage with the first voltage threshold value to generate first comparison data;
according to the first comparison data, adjusting the initial direct current voltage to the first voltage threshold value by adopting a proportional-integral controller to generate a target direct current voltage;
when the target direct-current voltage is received, comparing the initial system voltage with the second voltage threshold value to generate second comparison data;
and according to the second comparison data, the proportional-integral controller is adopted to adjust the initial system voltage to the second voltage threshold value, and the target system voltage is generated.
Optionally, the step of adjusting, based on the target system voltage, an initial offshore ac voltage amplitude corresponding to the first wind turbine starting set through the matrix modular multilevel converter, and generating a target offshore ac voltage amplitude includes:
when the target system voltage is received, sequentially starting the wind turbines in the first wind turbine starting set to generate an initial offshore alternating voltage amplitude;
comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data;
and regulating the initial offshore alternating voltage amplitude to a preset voltage amplitude according to the amplitude comparison data through the diode modularized multi-level converter, and generating a target offshore alternating voltage amplitude.
Optionally, the step of generating offshore wind power sending data based on the offshore wind farm operation data by performing system parameter adjustment through the diode modular multilevel converter includes:
substituting the offshore wind farm operation data into an active power formula corresponding to the diode modularized multi-level converter to calculate, and generating and conveying active power;
The active power formula is as follows:
wherein P is dr The active power is transmitted for the active power of the alternating current system side of the converter transformer; r is R dc The resistor is a direct current line resistor; u (U) r The effective value of the no-load alternating current of the converter transformer; x is X r1 Is the leakage reactance of the converter transformer; u (U) dci Is the inversion side direct current voltage;
extracting a voltage reference value corresponding to the preset output curve and the output active power to generate an initial alternating voltage reference value;
constructing a control input reference value according to the initial alternating voltage reference value and the converter transmission power reference value;
and adjusting system parameters according to the control input reference value through the diode modularized multi-level converter to generate offshore wind power transmission data.
Optionally, the offshore wind farm operation data includes an actual power value of the converter; the step of constructing a control input reference value according to the initial ac voltage reference value and the converter transmission power reference value includes:
calculating the difference between the initial alternating voltage reference value and the actual power value of the converter to generate alternating voltage reference value variation;
and calculating the sum value between the alternating voltage reference value variation and the initial alternating voltage reference value to generate a control input reference value.
The invention also provides a control system for the offshore wind power transmission, which is applied to the offshore wind power transmission system through flexible low-frequency alternating current, wherein the offshore wind power transmission system through flexible low-frequency alternating current comprises a land current conversion station, and the land current conversion station comprises a diode modularized multi-level converter and a matrix modularized multi-level converter; the system comprises:
the system comprises a voltage data, a converter valve capacity and a system single-unit fan capacity acquisition module, wherein the voltage data, the converter valve capacity and the system single-unit fan capacity acquisition module is used for acquiring voltage data, the converter valve capacity and the system single-unit fan capacity corresponding to the offshore wind power sent out by flexible low-frequency alternating current;
the system comprises a first wind turbine starting set and a second wind turbine starting set determining module, a second wind turbine starting set determining module and a third wind turbine starting set determining module, wherein the first wind turbine starting set and the second wind turbine starting set are used for dividing wind turbine starting by adopting the converter valve capacity and the single system fan capacity;
the target system voltage generation module is used for carrying out data adjustment according to the voltage data and a preset voltage threshold value to generate target system voltage;
the target offshore alternating voltage amplitude generation module is used for adjusting the initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set through the matrix modular multilevel converter based on the target system voltage to generate a target offshore alternating voltage amplitude;
The offshore wind farm operation data generation module is used for sequentially starting wind turbines in the second wind turbine starting set to generate offshore wind farm operation data when the target offshore alternating voltage amplitude is received;
and the offshore wind power transmission data generation module is used for generating offshore wind power transmission data based on the offshore wind power plant operation data by performing system parameter adjustment through the diode modular multilevel converter.
Optionally, the voltage data includes an initial direct current voltage and an initial system voltage; the preset voltage threshold comprises a first voltage threshold and a second voltage threshold; the target system voltage generation module includes:
the first comparison data generation module is used for comparing the initial direct-current voltage with the first voltage threshold value to generate first comparison data;
the target direct current voltage generation module is used for adjusting the initial direct current voltage to the first voltage threshold value by adopting a proportional-integral controller according to the first comparison data to generate a target direct current voltage;
the second comparison data generation module is used for comparing the initial system voltage with the second voltage threshold value when the target direct-current voltage is received, so as to generate second comparison data;
And the target system voltage generation sub-module is used for adjusting the initial system voltage to the second voltage threshold value by adopting the proportional-integral controller according to the second comparison data to generate the target system voltage.
Optionally, the target marine ac voltage amplitude generation module includes:
the initial offshore alternating voltage amplitude generation module is used for sequentially starting the wind turbines in the first wind turbine starting set to generate an initial offshore alternating voltage amplitude when the target system voltage is received;
the amplitude comparison data generation module is used for comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data;
and the target offshore alternating voltage amplitude generation submodule is used for adjusting the initial offshore alternating voltage amplitude to a preset voltage amplitude according to the amplitude comparison data through the diode modular multilevel converter to generate the target offshore alternating voltage amplitude.
The invention also provides electronic equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps for realizing the offshore wind power transmission control method.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements an offshore wind power dispatch control method as described in any one of the above.
From the above technical scheme, the invention has the following advantages:
according to the method, the voltage data, the converter valve capacity and the single-unit capacity of the system corresponding to the offshore wind power through the flexible low-frequency alternating current transmission system are obtained, then the converter valve capacity and the single-unit capacity of the system are adopted to conduct wind turbine starting division, and a first wind turbine starting set and a second wind turbine starting set are determined. And performing data adjustment based on the voltage data and a preset voltage threshold value to generate a target system voltage. Based on the target system voltage, the initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set is adjusted through the matrix type modularized multi-level converter, and the target offshore alternating voltage amplitude is generated. And when receiving the target offshore alternating voltage amplitude, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data. Based on the operation data of the offshore wind farm, system parameter adjustment is carried out through a diode modular multilevel converter, and offshore wind power transmission data are generated. The method solves the technical problems that the existing offshore wind power output control method is complex in operation and high in operation and maintenance cost, is not beneficial to large-scale development of offshore wind power, and causes poor adaptability. The control method is applied to the offshore wind power flexible low-frequency alternating current delivery system, solves the problem that black start of a wind power plant cannot be realized when a diode scheme is adopted, reduces construction cost of a converter station by matching a diode modular multi-level converter with a matrix modular multi-level converter, improves conveying distance of submarine cables, and can meet the requirement of economic delivery and efficient collection of the offshore wind power at middle and long distances.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flowchart showing steps of a method for controlling offshore wind power delivery according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a flexible low-frequency AC transmission system for offshore wind power according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating steps of a method for controlling offshore wind turbine delivery according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a diode DR converter according to a second embodiment of the present invention;
FIG. 5 is a plot of the total output power of a wind farm versus the reference voltage of the AC voltage at sea according to the second embodiment of the present invention;
FIG. 6 is a V/F optimization control strategy of marine M3C provided in accordance with a second embodiment of the present invention;
fig. 7 is a block diagram of a offshore wind power transmission control system according to a third embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a system, equipment and a medium for controlling offshore wind power output, which are used for solving the technical problems that the existing method for controlling offshore wind power output is complex in operation and high in operation and maintenance cost, is not beneficial to large-scale development of offshore wind power and causes poor adaptability.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating steps of a method for controlling offshore wind power output according to an embodiment of the invention.
The first embodiment of the invention provides a control method for sending out offshore wind power, which is applied to a flexible low-frequency alternating current sending-out system of offshore wind power, as shown in fig. 2, wherein the flexible low-frequency alternating current sending-out system of offshore wind power comprises an offshore wind power plant, an offshore booster station, a low-frequency circuit breaker, a low-frequency alternating current cable, a low-frequency alternating current tie line, a converter transformer, a connecting transformer, a wind power plant side DR converter valve, a direct current bus, a power grid side MMC converter valve, an M3C converter, a connecting transformer, an onshore power frequency circuit breaker and an onshore large power grid.
The offshore wind power plant is connected with an offshore booster station, the offshore booster station is connected with a low-frequency alternating current cable, low-frequency alternating current circuit breakers are arranged at two ends of the low-frequency alternating current cable, the low-frequency alternating current cable is connected with a DR converter valve at the wind power plant side through a converter transformer, the low-frequency alternating current cable is connected with a low-frequency side of an M3C converter valve through a connecting transformer, the converter transformer is connected with the wind power plant side through a low-frequency alternating current interconnecting link, DR converter at the wind power plant side is connected with an MMC converter valve at the power grid side through a direct current bus, the MMC converter valve at the power grid side is connected to an AC main network at the land through the connecting transformer, and the M3C converter valve is connected to the AC main network at the land through the connecting transformer.
The MMC converter valve at the power grid side adopts a constant direct current voltage control mode to control the direct current voltage to be stable. The M3C converter valve adopts a V/F control mode of fixed alternating current voltage amplitude and fixed alternating current system frequency to control the voltage amplitude and frequency stability of the offshore alternating current system. The ac side voltage of the wind-field side DR converter valve is established by the M3C converter valve. During steady state operation, the wind farm power is all sent out through the DR converter valve.
The M3C converter valve controls the frequency of the offshore alternating current system to be a frequency value lower than 50Hz so as to improve the conveying distance of the alternating current submarine cable. The M3C converter valve controls the voltage of the offshore alternating current system to be 220kV. And the power frequency side of the M3C converter valve controls the voltage stability of the self submodule.
The wind turbine generator in the offshore wind farm needs to stably operate in a low-frequency alternating current system. The offshore low-frequency alternating current system needs to adopt a low-frequency offshore booster station, a low-frequency alternating current breaker and a low-frequency alternating current submarine cable.
The delivery control method includes:
and 101, acquiring voltage data, converter valve capacity and system single-unit fan capacity corresponding to the offshore wind power through the flexible low-frequency alternating current transmission system.
In an embodiment of the present invention, the voltage data includes an initial direct current voltage and an initial system voltage. And obtaining the direct current voltage of the MMC converter valve at the power grid side, namely initial direct current voltage, and the offshore alternating current system voltage of the M3C converter valve, namely initial system voltage. And acquiring the capacity of an M3C converter valve and the capacity of a single fan in the system.
And 102, carrying out wind turbine starting division by adopting the capacity of a converter valve and the capacity of a single wind turbine of the system, and determining a first wind turbine starting set and a second wind turbine starting set.
In the embodiment of the invention, the total capacity of the offshore wind turbines in the first wind turbine starting set cannot exceed the capacity of the M3C converter valve. Therefore, all the wind turbines in the system can be divided into a first wind turbine starting set and a second wind turbine starting set through the capacity of the converter valve and the capacity of a single wind turbine of the system.
And 103, carrying out data adjustment according to the voltage data and a preset voltage threshold value to generate a target system voltage.
In an embodiment of the present invention, the preset voltage threshold includes a first voltage threshold and a second voltage threshold. The initial direct current voltage is compared with a first voltage threshold value to generate first comparison data. And according to the first comparison data, adopting a proportional-integral controller to adjust the initial direct-current voltage to a first voltage threshold value, and generating a target direct-current voltage. And when the target direct current voltage is received, comparing the initial system voltage with a second voltage threshold value to generate second comparison data. And according to the second comparison data, adopting a proportional-integral controller to adjust the initial system voltage to a second voltage threshold value, and generating a target system voltage.
And 104, adjusting the initial offshore alternating voltage amplitude corresponding to the starting set of the first wind turbine generator by a matrix type modularized multi-level converter based on the target system voltage, and generating the target offshore alternating voltage amplitude.
In the embodiment of the invention, when the target system voltage is received, the wind turbines in the first wind turbine starting set are sequentially started to generate the initial offshore alternating voltage amplitude. And comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data. And regulating the initial offshore alternating voltage amplitude to a preset voltage amplitude according to the amplitude comparison data through the diode modularized multi-level converter, and generating a target offshore alternating voltage amplitude.
And 105, when receiving the target offshore alternating voltage amplitude, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data.
In the embodiment of the invention, after all the offshore wind turbines in the first wind turbine starting set are started, the M3C converter valve controls the offshore alternating voltage amplitude, and after the offshore alternating voltage is increased to the target offshore alternating voltage amplitude, the offshore DR converter valve is conducted, so that the power of the wind power plant is transferred from the M3C converter valve to the DR converter valve. And sequentially starting the wind turbines in the second wind turbine starting set, controlling the alternating voltage amplitude by the M3C converter to enable the transmission power of the DR converter valve to rise and transmit all the output of the offshore wind turbine, and generating the operation data of the offshore wind turbine.
And 106, based on the operation data of the offshore wind farm, performing system parameter adjustment through a diode modularized multi-level converter to generate offshore wind power transmission data.
In the embodiment of the invention, the operation data of the offshore wind farm is substituted into an active power formula corresponding to the diode modularized multi-level converter for calculation, so as to generate and transmit active power. And extracting a voltage reference value corresponding to the preset output curve and the transmitted active power, and generating an initial alternating voltage reference value. The control input reference value is constructed based on the initial ac voltage reference value and the inverter transmission power reference value. And adjusting system parameters according to the control input reference value through the diode modularized multi-level converter to generate offshore wind power transmission data.
In the embodiment of the invention, the starting set of the first wind turbine and the starting set of the second wind turbine are determined by acquiring voltage data, converter valve capacity and single-unit capacity of the system corresponding to the offshore wind power through the flexible low-frequency alternating current transmission system and then carrying out wind turbine starting division by adopting the converter valve capacity and the single-unit capacity of the system. And performing data adjustment based on the voltage data and a preset voltage threshold value to generate a target system voltage. Based on the target system voltage, the initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set is adjusted through the matrix type modularized multi-level converter, and the target offshore alternating voltage amplitude is generated. And when receiving the target offshore alternating voltage amplitude, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data. Based on the operation data of the offshore wind farm, system parameter adjustment is carried out through a diode modular multilevel converter, and offshore wind power transmission data are generated. The method solves the technical problems that the existing offshore wind power output control method is complex in operation and high in operation and maintenance cost, is not beneficial to large-scale development of offshore wind power, and causes poor adaptability. The control method is applied to the offshore wind power flexible low-frequency alternating current delivery system, solves the problem that black start of a wind farm cannot be achieved when a diode scheme is adopted, and enables a diode modular multilevel converter, namely a DR-MMC converter and a matrix modular multilevel converter, namely an M3C converter, to be built on land together without building an offshore converter station. The power of the offshore wind farm is controlled to be sent out through the DR converter valve instead of the M3C converter valve, so that the loss of the low-capacity offshore MMC converter valve during long-term operation is reduced, and the long-term operation economy of the direct current system is improved. Meanwhile, the frequency of the offshore alternating current system is lower than 50Hz, the conveying distance of the submarine cable is improved, and the requirement of high-efficiency collection of medium-distance and long-distance offshore wind power economic delivery can be met.
Referring to fig. 3, fig. 3 is a flowchart illustrating steps of a method for controlling offshore wind power output according to a second embodiment of the present invention.
The second embodiment of the invention provides another offshore wind power sending control method, which is applied to an offshore wind power sending system through flexible low-frequency alternating current, and comprises the following steps:
step 301, obtaining voltage data, converter valve capacity and system single-unit fan capacity corresponding to the offshore wind power through the flexible low-frequency alternating current transmission system.
In the embodiment of the present invention, the implementation process of step 301 is similar to that of step 101, and will not be described herein.
And 302, carrying out wind turbine starting division by adopting the capacity of a converter valve and the capacity of a single wind turbine of the system, and determining a first wind turbine starting set and a second wind turbine starting set.
In the embodiment of the present invention, the implementation process of step 302 is similar to that of step 102, and will not be repeated here.
Step 303, performing data adjustment according to the voltage data and a preset voltage threshold value, and generating a target system voltage.
Further, the voltage data includes an initial direct current voltage and an initial system voltage; the preset voltage threshold includes a first voltage threshold and a second voltage threshold. Step 303 may include the following sub-steps S11-S14:
S11, comparing the initial direct-current voltage with a first voltage threshold value to generate first comparison data.
And S12, according to the first comparison data, adopting a proportional-integral controller to adjust the initial direct-current voltage to a first voltage threshold value, and generating a target direct-current voltage.
And S13, when the target direct-current voltage is received, comparing the initial system voltage with a second voltage threshold value to generate second comparison data.
S14, according to the second comparison data, the proportional-integral controller is adopted to adjust the initial system voltage to a second voltage threshold value, and the target system voltage is generated.
The first voltage threshold value is a reference value of direct current voltage of the MMC converter valve on the power grid side, which is set in advance based on actual requirements.
The second voltage threshold value refers to a reference value of the offshore alternating current system voltage of the M3C converter valve, which is set in advance based on actual requirements.
In the embodiment of the invention, firstly, unlocking an MMC converter valve at the power grid side, and controlling the initial direct current voltage to be a first voltage threshold value. Comparing the initial direct current voltage acquired in real time with a first voltage threshold value to obtain first comparison data, and adjusting the initial direct current voltage to the first voltage threshold value by adopting a PI controller, namely a proportional integral controller according to the first comparison data to obtain target direct current voltage. Then, the M3C converter valve is unlocked, and the initial system voltage is controlled to be a second voltage threshold. When the initial direct current voltage is adjusted to be a first voltage threshold value, the following step of unlocking the M3C converter valve is executed. When the target direct current voltage is received, comparing the initial system voltage with a second voltage threshold value to obtain second comparison data, and adjusting the initial system voltage to the second voltage threshold value by adopting a proportional-integral controller according to the second comparison data, so as to obtain the target system voltage.
And 304, adjusting the initial offshore alternating voltage amplitude corresponding to the starting set of the first wind turbine generator by a matrix type modularized multi-level converter based on the target system voltage, and generating the target offshore alternating voltage amplitude.
Further, step 304 may include the following substeps S21-S23:
and S21, when receiving the target system voltage, sequentially starting the wind turbines in the first wind turbine starting set to generate an initial offshore alternating voltage amplitude.
S22, comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data.
S23, adjusting the initial offshore alternating voltage amplitude to a preset voltage amplitude according to amplitude comparison data through a diode modularized multi-level converter, and generating a target offshore alternating voltage amplitude.
In the embodiment of the invention, after the target system voltage is generated, the offshore wind turbines in the first wind turbine starting set are gradually started, so that the power of the wind turbines is completely sent out through the M3C converter valve. The operation information of each offshore wind turbine is acquired through a communication device between the land convertor station and each wind turbine in the offshore wind farm, and the land convertor station can monitor the operation state of each offshore wind turbine in real time. And after all the offshore wind turbines in the first wind turbine starting set are started, generating an initial offshore alternating voltage amplitude. Comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data, then controlling the offshore alternating voltage amplitude through a diode modular multilevel converter, namely through an M3C converter valve according to the amplitude comparison data, and conducting an offshore DR converter valve after the offshore alternating voltage is improved to the preset voltage amplitude, so that the power of the wind power plant is transferred from the M3C converter valve to the DR converter valve to generate a target offshore alternating voltage amplitude.
And 305, when receiving the target offshore alternating voltage amplitude, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data.
In the embodiment of the present invention, the implementation process of step 305 is similar to that of step 105, and will not be repeated here.
And 306, substituting the operation data of the offshore wind farm into an active power formula corresponding to the diode modularized multi-level converter to calculate, and generating and conveying active power.
In the embodiment of the invention, for the power transmission characteristic of the diode DR, the external characteristic of DR is the same as that of LCC with a triggering angle of 0 °, and in order to reduce the harmonic wave at the ac/dc side, a 12-pulse rectifier bridge is generally used as a basic converter unit. The quasi-steady state model based on LCC can obtain DR external characteristic equation as follows:
P dr ＝U dcr I dcr ；
wherein U is dcr A direct current voltage of the diode DR; u (U) r The effective value of the no-load alternating current of the converter transformer; x is X r1 Is the leakage reactance of the converter transformer; i dcr Direct current of diode DR; p (P) dr The active power is transmitted for the active power of the alternating current system side of the converter transformer; q (Q) dr Reactive power at the alternating current system side of the converter transformer;power factor angle for DR; mu is the phase shift angle of DR.
Let the DC voltage at the inversion side be U dci The resistance of the direct current line is R dc The active power absorbed by the rectifying station, namely the active power formula corresponding to the diode modularized multi-level converter is as follows:
the active power formula is:
wherein P is dr The active power is transmitted for the active power of the alternating current system side of the converter transformer; r is R dc The resistor is a direct current line resistor; u (U) r The effective value of the no-load alternating current of the converter transformer; x is X r1 Is the leakage reactance of the converter transformer; u (U) dci Is an inverter-side direct-current voltage.
And substituting the direct current line resistance in the running data of the offshore wind farm, the leakage reactance of the no-load alternating current effective value converter transformer and the direct current voltage at the inversion side into an active power formula for calculation, and obtaining the transmitted active power after all offshore wind turbines are started.
Step 307, extracting a voltage reference value corresponding to the preset output curve and the active power to generate an initial alternating voltage reference value.
The preset output curve is shown as a relation curve between the offshore alternating voltage reference value and the total output of the wind power plant in fig. 5.
In the embodiment of the present invention, as shown in the schematic diagram of the diode DR converter in FIG. 4, when the DC voltage U is at the inversion side dci And a direct current line resistance R dc At a fixed value, P dr From which ac bus voltage amplitude U r And (5) determining. Therefore, for the DR converter which is completely uncontrollable, the DR direct current voltage can be changed by changing the voltage of the alternating current side, so as to change the transmitted direct current power.
The total capacity of the offshore wind farm, which is transmitted to the land convertor station, is measured in real time to obtain the transmission active power transmitted by the diode DR convertor valve, and then an offshore voltage amplitude reference value, namely an initial alternating voltage reference value, is obtained and is used as an input reference value for V/F control of the M3C convertor valve. FIG. 5 is a schematic diagram showing the relationship between the voltage reference value of the AC voltage at sea and the total output of the wind farm, wherein the voltage reference value of the AC voltage at sea and the total output of the wind farm are in positive correlation, and the current power of the compaction of the AC voltage at sea is completely sent out by a diode DR valve.
Step 308, constructing a control input reference value according to the initial ac voltage reference value and the converter transmission power reference value.
Further, the offshore wind farm operational data comprises an actual power value of the converter, step 308 may comprise the sub-steps S31-S32 of:
s31, calculating a difference value between the initial alternating voltage reference value and the actual power value of the converter, and generating an alternating voltage reference value variation.
S32, calculating the sum value between the alternating voltage reference value variation and the initial alternating voltage reference value, and generating a control input reference value.
In the embodiment of the invention, the M3C power control loop is introduced into the V/F control outer loop of the offshore station as droop control of the alternating voltage of the transmitting end, the alternating voltage of the transmitting end is dynamically regulated, the flexible distribution of power between the M3C converter and the diode rectifier is realized, and a control block diagram is shown in figure 6. P in the figure windfarm For the total power emitted by the offshore wind farm, P m3c For active power, P, transmitted by M3C converters ref Active power parameter for set M3C converterCheck value, U acref0 For the reference value of the alternating voltage obtained after the table lookup, namely the reference value of the initial alternating voltage, U acref And the reference value is the control input reference value which is the final alternating voltage reference value obtained after the M3C power control loop is overlapped.
The specific process is as follows: firstly, obtaining an alternating current voltage reference value U through the total power of an offshore wind farm according to a set output curve acref0 I.e. the initial ac voltage reference value. Simultaneously inputting M3C transmission power reference value P ref_m3c I.e. the actual power value of the converter, and the reference value of the initial AC voltage is differenced, the variation delta U of the reference value of the AC voltage is obtained by the PI controller acref I.e. the change of the reference value of the alternating voltage, the change DeltaU of the reference value of the alternating voltage acref Superimposed on the AC voltage reference U acref0 Obtaining a final alternating voltage reference value U acref As a control input reference for the V/F control of the M3C converter valve.
And 309, adjusting system parameters according to the control input reference value through the diode modularized multi-level converter to generate offshore wind power transmission data.
According to the embodiment of the invention, the total capacity of the offshore wind farm, which is transmitted to a land convertor station, is measured in real time to obtain the active power transmitted by a diode DR convertor valve, then an offshore voltage amplitude reference value is obtained and used as an input reference value for V/F control of an M3C convertor valve, an M3C power control loop is introduced into a V/F control outer loop of the M3C to serve as droop control of the alternating voltage of a transmitting end, the alternating voltage of the transmitting end is dynamically regulated, and flexible power distribution between the M3C convertor and the diode rectifier is realized to generate offshore wind power transmitting data.
In the embodiment of the invention, the offshore wind power transmission system comprises an offshore wind power plant, an offshore low-frequency alternating current system and an onshore alternating current frequency conversion system. The offshore wind farm comprises a low-frequency alternating current fan, the total capacity is 300MW, and the capacity of a single offshore wind turbine is 5MW. When the system is started, firstly, the land receiving end MMC converter valve is unlocked, the direct current voltage of the land receiving end MMC converter station is increased to +/-110 kV, then, the M3C converter valve is unlocked, the low-frequency side is controlled by V/F, the voltage of the marine alternating current system is increased to 220kV of rated value, and the frequency is 20Hz. Then, 5 offshore wind turbines are started, the voltage of the direct current side of the DR converter valve is higher, the DR converter valve is not conducted and started, and all direct current power (about 25 MW) flows through the M3C converter valve to be injected into the direct current side.
Then, the M3C converter increases the amplitude of the offshore alternating current voltage, when the alternating current voltage is increased to a threshold value (such as 225 kV), the DR converter valve at the transmitting end is conducted, the direct current power is rapidly transferred from the M3C converter valve to the DR converter valve, and the active power of the M3C converter valve is rapidly reduced to 0.
And then, restarting the rest offshore wind turbine, and continuously controlling the amplitude of the offshore alternating current voltage by the M3C converter valve along with the rising of active power, wherein the DR converter valve is conducted, and the voltage of the direct current side of the DR converter valve is basically unchanged. As the differential pressure between the ac voltage and the dc voltage at sea increases, the dc power of the DR converter valve increases gradually, and all the active power flows through the DR converter valve, and the active power of the M3C converter valve maintains substantially 0. Eventually, the active power of the DR converter valve gradually increases to 300MW, and the start-up process ends.
The DR-MMC converter and the M3C converter are built on land in a co-station mode, an offshore converter station is not required to be built, and the DR scheme is adopted at the transmitting end, so that the construction cost of the converter station is reduced. In addition, during steady-state operation, the power of the wind power plant is all sent out through the DR converter valve, the operation loss of the diode valve DR is lower than that of the MMC with the same capacity, and the long-term operation economy of the direct current system is improved. Meanwhile, the frequency of the offshore alternating current system is lower than 50Hz, the conveying distance of the submarine cable is improved, and the requirement of high-efficiency collection of medium-distance and long-distance offshore wind power economic delivery can be met.
Referring to fig. 7, fig. 7 is a block diagram illustrating a offshore wind power output control system according to a third embodiment of the present invention.
The offshore wind power transmission control system provided by the embodiment of the invention is applied to a flexible low-frequency alternating current transmission system of offshore wind power, and the flexible low-frequency alternating current transmission system of offshore wind power comprises a land-based converter station, wherein the land-based converter station comprises a diode modular multilevel converter and a matrix modular multilevel converter. The system comprises:
the voltage data, the converter valve capacity and the system single-unit fan capacity acquisition module 701 is used for acquiring voltage data, the converter valve capacity and the system single-unit fan capacity corresponding to the offshore wind power sent out by flexible low-frequency alternating current.
The first wind turbine starting set and second wind turbine starting set determining module 702 is configured to divide wind turbine starting by using a converter valve capacity and a single system fan capacity, and determine a first wind turbine starting set and a second wind turbine starting set.
The target system voltage generating module 703 is configured to perform data adjustment according to the voltage data and a preset voltage threshold value, and generate a target system voltage.
The target offshore ac voltage amplitude generation module 704 is configured to adjust an initial offshore ac voltage amplitude corresponding to the first wind turbine generator start set through the matrix modular multilevel converter based on the target system voltage, and generate a target offshore ac voltage amplitude.
The offshore wind farm operation data generation module 705 is configured to sequentially start wind turbines in the second wind turbine start set when receiving the target offshore ac voltage amplitude value, and generate offshore wind farm operation data.
The offshore wind power transmission data generation module 706 is configured to generate offshore wind power transmission data by performing system parameter adjustment through a diode modular multilevel converter based on offshore wind farm operation data.
Optionally, the voltage data includes an initial direct current voltage and an initial system voltage. The preset voltage threshold includes a first voltage threshold and a second voltage threshold. The target system voltage generation module 703 includes:
And the first comparison data generation module is used for comparing the initial direct-current voltage with a first voltage threshold value to generate first comparison data.
And the target direct current voltage generation module is used for adjusting the initial direct current voltage to a first voltage threshold value by adopting the proportional-integral controller according to the first comparison data to generate the target direct current voltage.
And the second comparison data generation module is used for comparing the initial system voltage with a second voltage threshold value when receiving the target direct-current voltage to generate second comparison data.
And the target system voltage generation sub-module is used for adjusting the initial system voltage to a second voltage threshold value by adopting the proportional-integral controller according to the second comparison data to generate the target system voltage.
Optionally, the target marine ac voltage magnitude generation module 704 includes:
the initial marine alternating voltage amplitude generating module is used for sequentially starting the wind turbines in the first wind turbine starting set to generate an initial marine alternating voltage amplitude when receiving the target system voltage.
The amplitude comparison data generation module is used for comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data.
The target offshore alternating voltage amplitude generation submodule is used for adjusting the initial offshore alternating voltage amplitude to a preset voltage amplitude according to amplitude comparison data through the diode modularized multi-level converter to generate the target offshore alternating voltage amplitude.
Alternatively, the offshore wind power output data generation module 706 includes:
the transmission active power generation module is used for substituting the operation data of the offshore wind farm into an active power formula corresponding to the diode modularized multi-level converter to calculate, so as to generate transmission active power.
The active power formula is:
wherein P is dr The active power is transmitted for the active power of the alternating current system side of the converter transformer; r is R dc The resistor is a direct current line resistor; u (U) r The effective value of the no-load alternating current of the converter transformer; x is X r1 Is the leakage reactance of the converter transformer; u (U) dci Is an inverter-side direct-current voltage.
The initial alternating voltage reference value generation module is used for extracting a voltage reference value corresponding to the preset output curve and the transmitted active power and generating an initial alternating voltage reference value.
And the control input reference value construction module is used for constructing a control input reference value according to the initial alternating voltage reference value and the converter transmission power reference value.
The marine wind power transmission data generation sub-module is used for adjusting system parameters according to the control input reference value through the diode modularized multi-level converter to generate marine wind power transmission data.
Optionally, the offshore wind farm operational data comprises an actual power value of the converter. The control input reference value construction module may perform the steps of:
And calculating the difference between the initial alternating voltage reference value and the actual power value of the converter to generate the alternating voltage reference value variation.
And calculating the sum value between the alternating voltage reference value variation and the initial alternating voltage reference value to generate a control input reference value.
The embodiment of the invention also provides electronic equipment, which comprises: a memory and a processor, the memory storing a computer program; the computer program, when executed by a processor, causes the processor to perform the offshore wind turbine export control method of any of the embodiments described above.
The memory may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory has memory space for program code to perform any of the method steps described above. For example, the memory space for the program code may include individual program code for implementing the various steps in the above method, respectively. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. The program code may be compressed, for example, in a suitable form. These codes, when executed by a computing processing device, cause the computing processing device to perform the steps in the offshore wind delivery control method described above.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the offshore wind turbine export control method according to any of the embodiments above.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The offshore wind power transmission control method is characterized by being applied to an offshore wind power transmission system through flexible low-frequency alternating current, wherein the offshore wind power transmission system comprises a land-based converter station, and the land-based converter station comprises a diode modularized multi-level converter and a matrix modularized multi-level converter; the method comprises the following steps:
acquiring voltage data, converter valve capacity and system single-unit fan capacity corresponding to the offshore wind power through a flexible low-frequency alternating current transmission system;
carrying out wind turbine starting division by adopting the converter valve capacity and the capacity of a single wind turbine of the system, and determining a first wind turbine starting set and a second wind turbine starting set;
Performing data adjustment according to the voltage data and a preset voltage threshold value to generate a target system voltage;
based on the target system voltage, adjusting an initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set through the matrix type modularized multi-level converter to generate a target offshore alternating voltage amplitude;
when the target offshore alternating voltage amplitude is received, sequentially starting the wind turbines in the second wind turbine starting set to generate offshore wind farm operation data;
and based on the operation data of the offshore wind farm, performing system parameter adjustment through the diode modularized multi-level converter to generate offshore wind power transmission data.
2. The offshore wind power export control method of claim 1, wherein the voltage data comprises an initial dc voltage and an initial system voltage; the preset voltage threshold comprises a first voltage threshold and a second voltage threshold; the step of generating the target system voltage by performing data adjustment according to the voltage data and a preset voltage threshold value comprises the following steps:
comparing the initial direct current voltage with the first voltage threshold value to generate first comparison data;
According to the first comparison data, adjusting the initial direct current voltage to the first voltage threshold value by adopting a proportional-integral controller to generate a target direct current voltage;
when the target direct-current voltage is received, comparing the initial system voltage with the second voltage threshold value to generate second comparison data;
and according to the second comparison data, the proportional-integral controller is adopted to adjust the initial system voltage to the second voltage threshold value, and the target system voltage is generated.
3. The offshore wind turbine export control method according to claim 1, wherein the step of generating the target offshore ac voltage amplitude by adjusting the initial offshore ac voltage amplitude corresponding to the first wind turbine start set through the matrix modular multilevel converter based on the target system voltage comprises:
when the target system voltage is received, sequentially starting the wind turbines in the first wind turbine starting set to generate an initial offshore alternating voltage amplitude;
comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data;
and regulating the initial offshore alternating voltage amplitude to a preset voltage amplitude according to the amplitude comparison data through the diode modularized multi-level converter, and generating a target offshore alternating voltage amplitude.
4. The offshore wind turbine export control method of claim 1, wherein the step of generating offshore wind turbine export data by performing system parameter adjustment through the diode modular multilevel converter based on the offshore wind farm operation data comprises:
substituting the offshore wind farm operation data into an active power formula corresponding to the diode modularized multi-level converter to calculate, and generating and conveying active power;
the active power formula is as follows:
wherein P is dr The active power is transmitted for the active power of the alternating current system side of the converter transformer; r is R dc The resistor is a direct current line resistor; u (U) r The effective value of the no-load alternating current of the converter transformer; x is X r1 Is the leakage reactance of the converter transformer; u (U) dci Is the inversion side direct current voltage;
extracting a voltage reference value corresponding to the preset output curve and the output active power to generate an initial alternating voltage reference value;
constructing a control input reference value according to the initial alternating voltage reference value and the converter transmission power reference value;
and adjusting system parameters according to the control input reference value through the diode modularized multi-level converter to generate offshore wind power transmission data.
5. The offshore wind farm operation data of claim 4, wherein the offshore wind farm operation data comprises an actual power value of the converter; the step of constructing a control input reference value according to the initial ac voltage reference value and the converter transmission power reference value includes:
Calculating the difference between the initial alternating voltage reference value and the actual power value of the converter to generate alternating voltage reference value variation;
and calculating the sum value between the alternating voltage reference value variation and the initial alternating voltage reference value to generate a control input reference value.
6. The offshore wind power transmission control system is characterized by being applied to an offshore wind power transmission system through flexible low-frequency alternating current, wherein the offshore wind power transmission system comprises a land-based converter station, and the land-based converter station comprises a diode modularized multi-level converter and a matrix modularized multi-level converter; the system comprises:
the system comprises a voltage data, a converter valve capacity and a system single-unit fan capacity acquisition module, wherein the voltage data, the converter valve capacity and the system single-unit fan capacity acquisition module is used for acquiring voltage data, the converter valve capacity and the system single-unit fan capacity corresponding to the offshore wind power sent out by flexible low-frequency alternating current;
the system comprises a first wind turbine starting set and a second wind turbine starting set determining module, a second wind turbine starting set determining module and a third wind turbine starting set determining module, wherein the first wind turbine starting set and the second wind turbine starting set are used for dividing wind turbine starting by adopting the converter valve capacity and the single system fan capacity;
The target system voltage generation module is used for carrying out data adjustment according to the voltage data and a preset voltage threshold value to generate target system voltage;
the target offshore alternating voltage amplitude generation module is used for adjusting the initial offshore alternating voltage amplitude corresponding to the first wind turbine starting set through the matrix modular multilevel converter based on the target system voltage to generate a target offshore alternating voltage amplitude;
the offshore wind farm operation data generation module is used for sequentially starting wind turbines in the second wind turbine starting set to generate offshore wind farm operation data when the target offshore alternating voltage amplitude is received;
and the offshore wind power transmission data generation module is used for generating offshore wind power transmission data based on the offshore wind power plant operation data by performing system parameter adjustment through the diode modular multilevel converter.
7. The offshore wind export control system of claim 6, wherein the voltage data comprises an initial dc voltage and an initial system voltage; the preset voltage threshold comprises a first voltage threshold and a second voltage threshold; the target system voltage generation module includes:
The first comparison data generation module is used for comparing the initial direct-current voltage with the first voltage threshold value to generate first comparison data;
the target direct current voltage generation module is used for adjusting the initial direct current voltage to the first voltage threshold value by adopting a proportional-integral controller according to the first comparison data to generate a target direct current voltage;
the second comparison data generation module is used for comparing the initial system voltage with the second voltage threshold value when the target direct-current voltage is received, so as to generate second comparison data;
and the target system voltage generation sub-module is used for adjusting the initial system voltage to the second voltage threshold value by adopting the proportional-integral controller according to the second comparison data to generate the target system voltage.
8. The offshore wind export control system of claim 6, wherein the target offshore ac voltage magnitude generation module comprises:
the initial offshore alternating voltage amplitude generation module is used for sequentially starting the wind turbines in the first wind turbine starting set to generate an initial offshore alternating voltage amplitude when the target system voltage is received;
The amplitude comparison data generation module is used for comparing the initial offshore alternating voltage amplitude with a preset voltage amplitude to generate amplitude comparison data;
and the target offshore alternating voltage amplitude generation submodule is used for adjusting the initial offshore alternating voltage amplitude to a preset voltage amplitude according to the amplitude comparison data through the diode modular multilevel converter to generate the target offshore alternating voltage amplitude.
9. An electronic device comprising a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, causes the processor to perform the steps of the offshore wind turbine export control method according to any one of claims 1 to 5.
10. A computer-readable storage medium having stored thereon a computer program, wherein the computer program when executed implements the offshore wind power dispatch control method of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311119910.7A CN117175707A (en) | 2023-08-31 | 2023-08-31 | Offshore wind power sending control method, system, equipment and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311119910.7A CN117175707A (en) | 2023-08-31 | 2023-08-31 | Offshore wind power sending control method, system, equipment and medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117175707A true CN117175707A (en) | 2023-12-05 |
Family
ID=88942428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311119910.7A Pending CN117175707A (en) | 2023-08-31 | 2023-08-31 | Offshore wind power sending control method, system, equipment and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117175707A (en) |
-
2023
- 2023-08-31 CN CN202311119910.7A patent/CN117175707A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8744635B2 (en) | Power production control method based on power production rate requirement | |
| CN112421670B (en) | Intermediate-frequency flexible direct-current power transmission system suitable for sending out wind power from open sea and control method thereof | |
| CN103825293B (en) | A kind of cooperative control method improving the wind energy turbine set-flexible direct current power transmission system of electric power system inertia levels | |
| CN105429183A (en) | Permanent magnetic direct-drive type offshore wind power plant grid-connected system topology structure and control method thereof | |
| AU2004203836A1 (en) | Continuous reactive power support for wind turbine generators | |
| CN112600237B (en) | Light hybrid converter topology suitable for offshore wind power transmission and control strategy thereof | |
| CN107251360A (en) | Control method for the system of the frequency converter including being connected to power network | |
| CN113452061B (en) | Offshore wind power direct current transmission system and control method thereof | |
| CN114629136A (en) | Offshore wind power soft direct-sending system based on super capacitor and inertia coordination method thereof | |
| Ramachandran et al. | AC grid forming by coordinated control of offshore wind farm connected to diode rectifier based HVDC link-review and assessment of solutions | |
| CN116131276A (en) | Offshore wind power reactive power compensation optimization calculation method and system based on power factors | |
| CN108879769A (en) | A kind of offshore grid-connected wind farm and the joint planing method of onshore power grid enlarging | |
| EP3326256B1 (en) | Method and system for power grid voltage regulation by distributed energy resources | |
| CN113178886A (en) | Offshore wind power direct-current power transmission system with direct-current sides connected in series and control method thereof | |
| da Rocha et al. | Coordinated decentralized control of dynamic volt-var function in oil and gas platform with wind power generation | |
| CN116937546A (en) | Wind storage grid connection considered power grid low-frequency oscillation suppression method and system | |
| CN117175707A (en) | Offshore wind power sending control method, system, equipment and medium | |
| CN115800296A (en) | Voltage frequency cooperative supporting method for open sea wind power through VSC-MTDC grid-connected system | |
| Jewel et al. | A Hybrid Reaching Law Based Double-Integral Sliding Mode Controller Design to Mitigate SSR Effects in a DFIG-Based Wind Farm | |
| Hassan et al. | Stability Assessment of Renewable Energy-based DC Microgrids for Offshore Applications | |
| CN114362191A (en) | Reactive power coordination control method and device for offshore wind farm and storage medium | |
| CN116316858B (en) | Marine wind turbine generator network type control method, system, equipment and medium | |
| Ge et al. | Research on low-frequency offshore wind power transmission and frequency conversion technology | |
| Niu et al. | Low Voltage Ride-through Strategy for Wind Farm and VSC-HVDC | |
| Faria Da Rocha et al. | Coordinated Decentralized Control of Dynamic Volt-Var Function in Oil and Gas Platform With Wind Power Generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |