CN115102189A - Wind power plant inertia frequency modulation power distribution and closed-loop control method, device and equipment - Google Patents
Wind power plant inertia frequency modulation power distribution and closed-loop control method, device and equipment Download PDFInfo
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Abstract
The invention relates to the field of wind power plant group control, and provides a wind power plant inertia frequency modulation power distribution and closed-loop control method, device and equipment. The wind power plant inertia frequency modulation power distribution and closed-loop control method comprises the following steps: determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit; determining an inertia frequency modulation active power adjustment amount in real time in the process of executing the adjustment instruction by the target unit; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation. The embodiment of the invention also provides a corresponding device and equipment. The embodiment provided by the invention fully exerts the inertia frequency modulation capability of the adjustable unit, quickly adjusts the power of the whole field, and meets the field-level inertia frequency modulation target power requirement.
Description
Technical Field
The invention relates to the field of wind power plant group control, in particular to a wind power plant inertia frequency modulation power distribution and closed-loop control method, a wind power plant inertia frequency modulation power distribution and closed-loop control device, wind power plant inertia frequency modulation power distribution and closed-loop control equipment and a computer readable storage medium.
Background
With the rapid increase of installed capacity of wind power, the capacity of concentrated wind power output is larger and larger. The output of the wind turbine generator has strong fluctuation and uncertainty, so that a large-scale wind power collection area has the typical characteristics of high wind power permeability and weak local power grid. Under the condition of high-permeability wind power access, the primary frequency modulation difficulty of a power grid is increased sharply, so that the primary frequency modulation capability of the existing wind turbine generator needs to be fully excavated, the wind power plant has the primary frequency modulation function, and the problem of difficulty in primary frequency modulation of the power grid is solved.
The inertia response control of the wind generating set is a mode of releasing kinetic energy of a rotor of the set to realize power control, and can improve or reduce the output of the set in a short time and support the frequency change of a power grid. At present, researches on station-level inertia frequency modulation of a wind power plant mainly focus on implementation modes of the station-level inertia frequency modulation, how to realize the distribution of single machine inertia frequency modulation target values, but the rationality and the accuracy of the distribution of the single machine inertia frequency modulation target values, and the effects of the whole station frequency modulation in the execution process and subsequent compensation means are less researched.
Disclosure of Invention
The embodiment of the invention aims to provide a method, a device and equipment for wind power plant inertia frequency modulation power distribution and closed-loop control, and mainly solves the problems of poor regulation effect and unreasonable regulation power distribution of the existing wind generating set.
In order to achieve the above object, a first aspect of the present invention provides a wind farm inertia frequency modulation power distribution and closed-loop control method, including: determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit; determining the adjustment quantity of inertia frequency modulation active power in real time in the process of executing the adjustment instruction by the target unit; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation.
Preferably, the generating of the adjustment command according to the rotation speed constraint and the adjustable power constraint of the target unit includes: determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount; determining adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint; determining an inertia frequency modulation power target of the target unit according to the first distribution coefficient and the second distribution coefficient; and generating a corresponding adjusting instruction according to the inertia frequency modulation power-rising target.
Preferably, determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount includes: determining the upper limit or the lower limit of the rotating speed in the rotating speed constraint as a reference rotating speed according to the adjustment trend of the target unit; acquiring a difference value between the current rotating speed and the reference rotating speed as a rotating speed adjustment amount; determining the proportion of the rotating speed adjustment quantity of the target unit in the sum of the rotating speed adjustment quantities of all the target units participating in inertia frequency modulation; taking the ratio as the first distribution coefficient.
Preferably, determining an adjustable power constraint according to the current active power and the rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint includes: determining the upper limit or the lower limit of the rated power determination adjustable power constraint as reference power according to the adjustment trend of the target unit; obtaining a difference value between the current active power and the reference power as a power adjustment quantity; determining the proportion of the power adjustment quantity of the target unit in the sum of the power adjustment quantities of all the target units participating in inertia frequency modulation; and taking the ratio as the second distribution coefficient.
Preferably, determining the inertia frequency modulation liter power target of the target unit according to the first distribution coefficient and the second distribution coefficient includes: determining corresponding adjustment weights for the first and second distribution coefficients; obtaining a comprehensive coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjusting weight; and determining an inertia frequency modulation power-rise target of the target unit according to the inertia frequency modulation active power adjustment quantity and the comprehensive coefficient.
Preferably, the determining, in real time, an inertia frequency modulation active power adjustment amount includes: determining an inertia frequency modulation active power adjustment amount according to a set period; correspondingly, the generated instruction of the secondary dynamic compensation is superposed in the adjusting instruction in the previous period.
Preferably, the secondary dynamic compensation adopts a feedforward double-PI closed-loop control method; the feedforward double PI closed-loop control method comprises the following steps: and the current inner loop PI adjuster is adopted for adjustment, and the voltage outer loop PI adjuster is adopted for adjustment.
In a second aspect of the present invention, there is also provided a wind farm inertia frequency modulation power distribution and closed-loop control apparatus, including: the adjusting instruction module is used for determining an inertia frequency modulation active power adjusting quantity and a target unit to be adjusted, and generating an adjusting instruction according to the rotating speed constraint and the adjustable power constraint of the target unit; the adjustment monitoring module is used for determining the adjustment quantity of the inertia frequency modulation active power in real time in the process that the target unit executes the adjustment instruction; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation.
In a third aspect of the present invention, a wind farm inertia frequency modulation power distribution and closed-loop control device is further provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the wind farm inertia frequency modulation power distribution and closed-loop control method when executing the computer program.
In a fourth aspect of the present invention, there is also provided a computer readable storage medium having stored therein instructions which, when run on a computer, cause the computer to perform the steps of the wind farm inertia modulated power distribution and closed loop control method described above.
A fifth aspect of the invention provides a computer program product comprising a computer program which, when executed by a processor, implements the wind farm inertia modulated power distribution and closed loop control method as described above.
The technical scheme at least has the following beneficial effects:
the method considers the upper limit and the lower limit of the motor rotating speed and the unit operating power of the wind generating set as constraints, realizes reasonable distribution of the unit inertia frequency modulation power targets in different operating states in the wind power plant, dynamically considers the execution capacity of the unit inertia frequency modulation target power, and performs secondary dynamic compensation distribution of the unit power targets by means of feedforward double-PI closed-loop control, so that the problem that the whole-field regulation does not reach the standard due to the fact that certain units cannot fully execute inertia frequency modulation instructions due to self reasons is avoided, the inertia frequency modulation capacity of adjustable units is fully exerted, the whole-field power is rapidly adjusted, the field-level inertia frequency modulation target power requirement is met, meanwhile, the phenomenon that the wind generating set is off-grid due to unreasonable distribution of the in-field grid-connected wind generating set inertia response power can be avoided, and the whole-field regulation effect is influenced.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 schematically shows an implementation schematic diagram of a wind farm inertia frequency modulation power distribution and closed-loop control method according to an embodiment of the invention;
FIG. 2 schematically illustrates a flow diagram of field level inertia frequency modulation logic, according to an embodiment of the invention;
FIG. 3 schematically shows a structural schematic diagram of a wind farm inertia frequency modulation power distribution and closed-loop control device according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 1 schematically shows an implementation schematic diagram of a wind farm inertia frequency modulation power distribution and closed-loop control method according to an embodiment of the invention. As shown in fig. 1, the method includes:
s01, determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit; the method for determining the inertia frequency modulation active power adjustment quantity can adopt the following modes: the field level controller acquires the frequency change rate df/dt of the outlet wire of the grid-connected point of the wind power plant through the high-performance frequency acquisition device, and calculates the inertia frequency modulation active power adjustment quantity delta P of the whole field according to the power grid standard;
wherein, T J Is a station inertial time constant; f. of N Is the rated frequency of the system; f is the frequency of the grid-connected point; p N Is the rated capacity of the station. Meanwhile, amplitude limiting is carried out on the inertia frequency modulation active power adjustment quantity delta P according to the requirements of a power grid, and the amplitude limiting is generally 10% of the full-field rated capacity.
The following method can be adopted for determining the target unit to be adjusted: and setting upper and lower inertia frequency modulation rotation speed limits according to the upper and lower normal operation rotation speed limits of the wind turbine generator, dividing the whole in-operation unit into a unit capable of participating in inertia frequency modulation and a unit incapable of participating in inertia frequency modulation, and only distributing inertia frequency modulation target power to the units capable of participating in inertia frequency modulation. Meanwhile, in the inertia adjusting process, when the rotating speed of the unit exceeds the upper limit value and the lower limit value of the rotating speed of the inertia frequency modulation, the inertia frequency modulation is quitted, and the original power is recovered.
And for target power distribution which can participate in the inertia frequency modulation unit, considering the rotating speed of a motor and the adjustable power allowance when the unit operates, and issuing a unit inertia frequency modulation power target of a first period.
S02, determining an inertia frequency modulation active power adjustment amount in real time in the process that the target unit executes the adjustment instruction; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation.
Because the distribution of the inertia frequency modulation power target in the prior art is too ideal, the situation that the unit can not actually execute the inertia frequency modulation target instruction is not considered, and the field-level inertia frequency modulation target can not be accurately executed. The method adds a feedforward double PI closed-loop control link, and if the actual value P of the full-field active power is within a set period (which can be set according to the power grid standard) act And a set value P set ＝P 0 And when the difference of the + delta P still cannot meet the requirement of 1 percent of the rated capacity of the whole field (which can be set according to the power grid standard), performing secondary dynamic compensation distribution on the unit power target, fully exerting the inertia frequency modulation capability of the adjustable unit, increasing the adjustment amount of the unit with insufficient adjustment target amount compensation action of the adjustable unit, and ensuring that the field-level inertia frequency modulation target power requirement is met.
Through the steps, the adjusting efficiency and the adjusting effect of the wind power plant inertia frequency modulation power can be improved.
In some embodiments provided by the present invention, generating an adjustment instruction according to a rotation speed constraint and an adjustable power constraint of a target unit includes: determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount; determining adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint; determining an inertia frequency modulation power target of the target unit according to the first distribution coefficient and the second distribution coefficient; and generating a corresponding adjusting instruction according to the inertia frequency modulation power-rising target. The rotation speed constraint, that is, the rotation speed adjustment of the wind turbine generator set, should not exceed a rotation speed operation interval, which includes an upper rotation speed limit and a lower rotation speed limit. And determining a first distribution coefficient according to the rotation speed adjustment amount determined by the rotation speed constraint, wherein the distribution coefficient can be obtained by mapping according to the existing preset rule or can be obtained according to the existing empirical model. Similarly, adjustable power constraints also need to be considered in the adjustment process, and the adjustable power also has an upper limit and a lower limit. The second distribution coefficient is determined based on the adjustable power, and the determination method may be arbitrarily selected, and may be the same as or different from the determination method of the first distribution coefficient.
In some embodiments provided herein, determining a rotational speed adjustment based on the current rotational speed of the target unit and the rotational speed constraint, and determining a first distribution coefficient based on the rotational speed adjustment comprises: determining the upper limit or the lower limit of the rotating speed in the rotating speed constraint as a reference rotating speed according to the adjustment trend of the target unit; acquiring a difference value between the current rotating speed and the reference rotating speed as a rotating speed adjustment amount; determining the proportion of the rotating speed adjustment quantity of the target unit in the sum of the rotating speed adjustment quantities of all the target units participating in inertia frequency modulation; taking the ratio as the first distribution coefficient. The present embodiment provides a method for determining a first distribution coefficient, in which the ratio of the rotation speed adjustment amount is used as the first distribution coefficient. The calculation process is exemplified as follows: for a unit i with increased power, the margin omega of the rotation speed constraint up，i ＝ω 0,i -ω min Wherein ω is 0,i Is the current motor speed, omega, of the unit i min The total rotating speed constraint allowance omega of the machine set i participating in the inertia frequency modulation up ＝Σω up,i The power and the rotating speed of the unit i liter are restricted to be distributed coefficients, namely a first distribution coefficient a up，i ＝ω up,i /ω up . Similarly, for a power-down unit i, the margin ω of the rotational speed constraint down，i ＝ω max -ω 0,i Wherein ω is 0,i Is the current motor speed, omega, of the unit i max The total rotating speed constraint allowance omega of the machine set i participating in the inertia frequency modulation down ＝Σω down,i The power-reducing rotating speed of the unit i is restricted by a distribution coefficient, namely a first distribution coefficient a down，i ＝ω down,i /ω down 。
In some optional embodiments provided by the present invention, determining an adjustable power constraint according to the current active power and the rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint, includes: adjustment according to target unitTrend determining the upper limit or the lower limit in the rated power determination adjustable power constraint is a reference power; obtaining a difference value between the current active power and the reference power as a power adjustment quantity; determining the proportion of the power adjustment quantity of the target unit in the sum of the power adjustment quantities of all the target units participating in inertia frequency modulation; and taking the ratio as the second distribution coefficient. The present embodiment provides a method for determining a second allocation coefficient, in which the ratio of the power adjustment amount is used as the first allocation coefficient. The calculation process is exemplified as follows: for a unit i with increased power, the adjustable power margin C of the unit i up，i ＝C max -p 0,i In which C is max Rated capacity of the unit, p 0,i The total adjustable power margin C of all the participating inertia frequency modulation units is the current active power of the units up ＝∑C up，i The adjustable power margin distribution coefficient b of the unit i liter power up，i ＝C up,i /C up . Similarly, for the power-reducing unit i, the power margin C can be adjusted by the unit i down，i ＝p 0,i -C min In which C is min For minimum operating capacity, p, of the unit 0,i The total adjustable power margin C of all the participating inertia frequency modulation units is the current active power of the units down ＝ΣC down，i And the adjustable power margin distribution coefficient b of the unit i power reduction down，i ＝C down,i /C down 。
In some optional embodiments provided herein, determining the inertia chirp-per-liter power target of the target train according to the first distribution coefficient and the second distribution coefficient includes: determining corresponding adjustment weights for the first and second distribution coefficients; obtaining a comprehensive coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjusting weight; and determining an inertia frequency modulation power-rise target of the target unit according to the inertia frequency modulation active power adjustment quantity and the comprehensive coefficient. In the above-described embodiment, the first distribution coefficient and the second distribution coefficient calculated as described above are integrated to obtain one integrated coefficient to calculate the final power distribution, and this embodiment provides an integrated coefficientAnd the coefficient algorithm mode is adopted to improve the distribution efficiency. The method is also divided into two cases of a power increasing unit and a power decreasing unit. For a power-per-liter unit i, the overall coefficient is equal to (k) 1 a up,i +k 2 b up,i ) Wherein k is 1 、k 2 Weight, k, for the motor speed per liter and the adjustable power margin 1 +k 2 1. Correspondingly, the inertia frequency modulation power-rise target of the unit i is p up,i ＝ΔP×(k 1 a up，i +k 2 b up，i ). At the same time, limited by the capacity of the unit i, p up,i ≤C max -p 0,i . For a power-down unit i, the overall coefficient is equal to (k) 3 a down,i +k 4 b down,i ) Wherein k is 3 、k 4 For reducing the weight, k, of the rotational speed and the adjustable power margin of the power motor 3 +k 4 1. The inertia frequency modulation power reduction target of the unit i is p down,i ＝ΔP×(k 3 a down，i +k 4 b down，i ). At the same time, limited by the minimum operating capacity of unit i, p down,i ≤p 0,i -C min 。
In some embodiments provided by the present invention, the determining, in real time, an inertia frequency modulation active power adjustment amount includes: determining an inertia frequency modulation active power adjustment amount according to a set period; correspondingly, the generated instruction of the secondary dynamic compensation is superposed in the adjusting instruction in the previous period. The embodiment provides a technical scheme for adjusting and monitoring the process of executing the adjusting instruction by the target unit. The set period here may be set according to the power grid standard, or may be set according to an actual scene. The setting period may be a calculation period or a transmission period of the adjustment instruction. When the secondary dynamic compensation exists, the two adjusting instructions are overlapped according to the periods, and a certain time shift exists between the periods which are overlapped with each other.
In some embodiments provided herein, the second dynamic compensation employs a feedforward dual PI closed-loop control method; the feedforward double PI closed-loop control method comprises the following steps: and the current inner loop PI adjuster is adopted for adjustment, and the voltage outer loop PI adjuster is adopted for adjustment. The feedforward double PI closed-loop control method is a control method which respectively adopts a voltage closed loop and a current closed loop, and has the advantages of high dynamic response speed and good control effect. The feedforward compensation is actually introduced by using an open-loop control method to compensate the measurable disturbance signal, so that the characteristics of the control system are not changed. The current inner loop PI regulator in this embodiment includes a PI controller and a delay, and adds a current signal sampling delay link and a delay link of a PWM device. The parameters of the specific setting are determined through the transfer function. Similarly, the voltage outer loop PI regulator also adopts similar design steps. And under the condition of considering the sampling delay of the outer ring voltage signal, determining a transfer function of the direct current voltage controller, and further determining PI parameters of the direct current voltage controller through a corresponding closed-loop characteristic equation and the like.
Fig. 2 schematically illustrates a flow diagram of field level inertia frequency modulation logic according to an embodiment of the present invention, as shown in fig. 2. The flow diagram comprises: and calculating delta P according to the frequency change rate, and determining the inertia frequency modulation unit which can participate in the inertia frequency modulation unit, namely the target unit to be adjusted. And determining whether the power is adjusted to be increased or decreased according to the positive-negative relation of the delta P. And in the adjusting process, determining a unit power-up target or a unit power-down target according to the rotation speed constraint and the adjustable power, issuing the unit power-up target or the unit power-down target, judging whether the current requirement of the whole field frequency modulation is met, and finishing the adjustment and control when the requirement is met. And when the adjustment quantity is not met, calculating the single adjustment quantity delta P of the whole field through feedforward double PI, and distributing and issuing according to the method until the requirement is met.
Based on the same inventive concept, the embodiment of the invention also provides a wind power plant inertia frequency modulation power distribution and closed-loop control device. FIG. 3 schematically shows a structural schematic diagram of a wind farm inertia frequency modulation power distribution and closed-loop control device according to an embodiment of the invention. As shown in fig. 3, the apparatus includes: the adjusting instruction module is used for determining inertia frequency modulation active power adjusting quantity and a target unit to be adjusted, and generating an adjusting instruction according to the rotating speed constraint and the adjustable power constraint of the target unit; the adjustment monitoring module is used for determining the adjustment quantity of the inertia frequency modulation active power in real time in the process that the target unit executes the adjustment instruction; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation.
In some optional embodiments, generating the adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit includes: determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount; determining adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint; determining an inertia frequency modulation power target of the target unit according to the first distribution coefficient and the second distribution coefficient; and generating a corresponding adjusting instruction according to the inertia frequency modulation power-rising target.
In some optional embodiments, determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount comprises: determining the upper limit or the lower limit of the rotating speed in the rotating speed constraint as a reference rotating speed according to the adjustment trend of the target unit; acquiring a difference value between the current rotating speed and the reference rotating speed as a rotating speed adjustment amount; determining the proportion of the rotating speed adjustment quantity of the target unit in the sum of the rotating speed adjustment quantities of all the target units participating in inertia frequency modulation; taking the ratio as the first distribution coefficient.
In some optional embodiments, determining an adjustable power constraint according to the current active power and the rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint includes: determining the upper limit or the lower limit of the rated power determination adjustable power constraint as reference power according to the adjustment trend of the target unit; acquiring a difference value between the current active power and the reference power as a power adjustment quantity; determining the proportion of the power adjustment quantity of the target unit in the sum of the power adjustment quantities of all the target units participating in inertia frequency modulation; and taking the ratio as the second distribution coefficient.
In some optional embodiments, determining the inertia chirp-rise power target for the target train according to the first distribution coefficient and the second distribution coefficient includes: determining corresponding adjustment weights for the first and second distribution coefficients; obtaining a comprehensive coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjusting weight; and determining an inertia frequency modulation power-rising target of the target unit according to the inertia frequency modulation active power adjustment quantity and the comprehensive coefficient.
In some optional embodiments, the determining, in real time, an inertia frequency modulation active power adjustment amount includes: determining an inertia frequency modulation active power adjustment amount according to a set period; correspondingly, the generated instruction of the secondary dynamic compensation is superposed in the adjusting instruction in the previous period.
In some optional embodiments, the secondary dynamic compensation employs a feedforward dual-PI closed-loop control method; the feedforward double PI closed-loop control method comprises the following steps: and the current inner loop PI adjuster is adopted for adjustment, and the voltage outer loop PI adjuster is adopted for adjustment.
The specific limitations of each functional module in the wind farm inertia frequency modulation power distribution and closed-loop control device may refer to the limitations of the wind farm inertia frequency modulation power distribution and closed-loop control method, and are not described herein again. The various modules in the above-described apparatus may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In some embodiments, the invention further provides a wind farm inertia frequency modulation power distribution and closed-loop control device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the wind farm inertia frequency modulation power distribution and closed-loop control method when executing the computer program. The processor herein has functions of numerical calculation and logical operation, and has at least a central processing unit CPU having data processing capability, a random access memory RAM, a read only memory ROM, various I/O ports, an interrupt system, and the like. The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be provided with one or more than one, and the method is realized by adjusting the kernel parameters. The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
In an embodiment of the present invention, there is also provided a computer-readable storage medium having stored therein instructions, which when executed by a processor, cause the processor to be configured to execute the wind farm inertia modulated power distribution and closed loop control method described above.
In one embodiment provided by the invention, a computer program product is provided, which comprises a computer program, and the computer program realizes the wind farm inertia frequency modulation power distribution and closed loop control method when being executed by a processor.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A wind power plant inertia frequency modulation power distribution and closed-loop control method is characterized by comprising the following steps:
determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit;
and in the process of executing the adjusting instruction by the target unit, determining the inertia frequency modulation active power adjusting quantity in real time, and performing secondary dynamic compensation when the inertia frequency modulation active power adjusting quantity is larger than a set threshold value.
2. The method of claim 1, wherein generating the adjustment command based on the speed constraint and the adjustable power constraint of the target unit comprises:
determining a rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining a first distribution coefficient according to the rotation speed adjustment amount;
determining adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint;
determining an inertia frequency modulation power target of the target unit according to the first distribution coefficient and the second distribution coefficient;
and generating a corresponding adjusting instruction according to the inertia frequency modulation power-rising target.
3. The method of claim 2, wherein determining a rotational speed adjustment based on the current rotational speed of the target assembly and the rotational speed constraint, and determining a first distribution coefficient based on the rotational speed adjustment comprises:
determining the upper limit or the lower limit of the rotating speed in the rotating speed constraint as a reference rotating speed according to the adjustment trend of the target unit;
acquiring a difference value between the current rotating speed and the reference rotating speed as a rotating speed adjustment amount;
determining the proportion of the rotating speed adjustment quantity of the target unit in the sum of the rotating speed adjustment quantities of all the target units participating in inertia frequency modulation;
taking the ratio as the first distribution coefficient.
4. The method of claim 2, wherein determining an adjustable power constraint based on the current active power and the rated power of the target unit, and determining a second distribution coefficient based on the adjustable power constraint comprises:
determining the upper limit or the lower limit of the rated power determination adjustable power constraint as reference power according to the adjustment trend of the target unit;
obtaining a difference value between the current active power and the reference power as a power adjustment quantity;
determining the proportion of the power adjustment quantity of the target unit in the sum of the power adjustment quantities of all the target units participating in inertia frequency modulation;
and taking the ratio as the second distribution coefficient.
5. The method of claim 2, wherein determining the inertia chirp-up power target for the target fleet from the first and second distribution coefficients comprises:
determining corresponding adjustment weights for the first and second distribution coefficients;
obtaining a comprehensive coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjusting weight;
and determining an inertia frequency modulation power-rise target of the target unit according to the inertia frequency modulation active power adjustment quantity and the comprehensive coefficient.
6. The method of claim 2, wherein the determining the inertia frequency modulation active power adjustment in real time comprises:
determining an inertia frequency modulation active power adjustment amount according to a set period;
correspondingly, the generated instruction of the secondary dynamic compensation is superposed in the adjusting instruction in the previous period.
7. The method of claim 2, wherein the quadratic dynamic compensation employs a feed-forward dual PI closed-loop control method;
the feedforward double PI closed-loop control method comprises the following steps: and the current inner loop PI adjuster is adopted for adjustment, and the voltage outer loop PI adjuster is adopted for adjustment.
8. A wind power plant inertia frequency modulation power distribution and closed-loop control device is characterized by comprising:
the adjusting instruction module is used for determining an inertia frequency modulation active power adjusting quantity and a target unit to be adjusted, and generating an adjusting instruction according to the rotating speed constraint and the adjustable power constraint of the target unit; and
the adjustment monitoring module is used for determining the adjustment quantity of the inertia frequency modulation active power in real time in the process that the target unit executes the adjustment instruction; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation.
9. Wind farm inertia frequency modulated power distribution and closed-loop control device comprising a memory, a processor and a computer program stored in said memory and executable on said processor, characterized in that said processor, when executing said computer program, realizes the steps of the wind farm inertia frequency modulated power distribution and closed-loop control method according to any of the claims 1 to 7.
10. A computer readable storage medium having stored therein instructions which, when executed on a computer, cause the computer to perform the steps of the wind farm inertia frequency modulated power distribution and closed loop control method of any of claims 1 to 7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117394396A (en) * | 2023-12-11 | 2024-01-12 | 天津国能津能滨海热电有限公司 | Frequency modulation method, frequency modulation device, storage medium and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117394396A (en) * | 2023-12-11 | 2024-01-12 | 天津国能津能滨海热电有限公司 | Frequency modulation method, frequency modulation device, storage medium and electronic equipment |
| CN117394396B (en) * | 2023-12-11 | 2024-02-23 | 天津国能津能滨海热电有限公司 | Frequency modulation method, frequency modulation device, storage medium and electronic equipment |
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