CN116454922A - System frequency stability control method and system considering new energy frequency modulation energy constraint - Google Patents
System frequency stability control method and system considering new energy frequency modulation energy constraint Download PDFInfo
- Publication number
- CN116454922A CN116454922A CN202310706307.2A CN202310706307A CN116454922A CN 116454922 A CN116454922 A CN 116454922A CN 202310706307 A CN202310706307 A CN 202310706307A CN 116454922 A CN116454922 A CN 116454922A
- Authority
- CN
- China
- Prior art keywords
- frequency
- energy
- frequency modulation
- new energy
- time
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000006641 stabilisation Effects 0.000 claims abstract description 57
- 238000011105 stabilization Methods 0.000 claims abstract description 57
- 230000001360 synchronised effect Effects 0.000 claims description 31
- 230000004044 response Effects 0.000 claims description 28
- 238000013016 damping Methods 0.000 claims description 22
- 238000004590 computer program Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a system frequency stability control method and system considering new energy frequency modulation energy constraint, comprising the following steps: calculating the arrival time of the lowest frequency point of the system under the active disturbance; judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not, and obtaining a judging result; when the frequency stabilization energy balance criterion is not met, determining available frequency modulation energy of each new energy station; and adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in sequence from small to large according to the available frequency modulation energy, and stopping the system until the frequency modulation stabilization requirement is met, thereby completing the system frequency stabilization control. The invention can equivalent the frequency stability to the problem of the balance between disturbance energy and frequency modulation energy from the energy perspective, then equivalent the contribution of new energy frequency modulation to the frequency to an energy square, and ensure the frequency stability and simultaneously minimize the requirement on the new energy frequency modulation energy through the superposition discrimination of the energy square.
Description
Technical Field
The invention relates to the technical field of power system analysis and operation control, in particular to a system frequency stability control method and system considering new energy frequency modulation energy constraint.
Background
The current new energy frequency modulation control strategy is mainly applied to droop control, virtual inertia control and comprehensive control thereof, wherein the additional inertial control simulates the inertial response of the synchronous machine by introducing the rate of change of the grid frequency; the additional primary frequency modulation control responds to changes in the grid frequency by introducing a difference between the grid frequency and the nominal value. However, whether the frequency modulation characteristic of the analog synchronous machine is necessary and the frequency modulation characteristic of the analog synchronous machine has optimal supporting effect on the frequency response of the system is still to be further researched, meanwhile, the restraint of the new energy frequency modulation energy is not considered in the current research on the frequency active supporting of the power grid in the new energy frequency modulation control, the situation is different from the situation that the actual new energy frequency modulation energy is limited, and if the new energy frequency modulation energy is excessively utilized, the frequency secondary drop can be caused and the safety of a unit is threatened.
Therefore, the problem of frequency modulation coordination between the new energy and the synchronous machine needs to be considered, and particularly, how to match the control rule with the frequency response characteristic of the synchronous machine. Synchronous machines are still important frequency adjustment resources in the system and do not have the energy cost of frequency modulation. The frequency support characteristics of the new energy source and the synchronous machine are completely different, the new energy source realizes that the kinetic energy of a rotor, the frequency modulation energy and the like released by the frequency support are limited (the energy is not needed to be allocated), but the response speed is high, and meanwhile, the power control is flexible and controllable. The synchronous machine has enough frequency modulation energy, but because the mechanical delay of primary frequency modulation response is slower and inflexible, the frequency modulation coordination between the synchronous machine and the new energy is needed, if the synchronous machine and the new energy are matched on a frequency support, the frequency response characteristic of the system is also better, however, the current new energy frequency sagging control and virtual inertia control are difficult to realize better coordination with the synchronous machine, and the coordination mechanism and the mechanism are unclear for the stabilization mechanism of the frequency response of the system. The new energy under which control law can realize reasonable release of the new energy frequency modulation energy and effective coordination with the synchronous machine frequency modulation energy, thereby improving the system frequency stability.
The problem of intervention time of new energy frequency modulation is related, and the current basic knowledge is that the earlier the new energy intervention is, the larger the frequency modulation control intensity is, the more obvious the frequency characteristic improvement of the system is, but the intervention of the new energy improves the frequency characteristic, and simultaneously, the primary frequency modulation response amplitude of the synchronous machine is restrained, the advantage that the primary frequency modulation standby energy output of the synchronous machine is not costly is difficult to fully develop, the new energy participates in frequency modulation too early and excessively, and the problem of later power recovery is also possibly caused. Therefore, when the new energy participates in frequency modulation, the advantages of fast frequency modulation and strong controllability of the new energy can be exerted to the greatest extent, the disadvantages of limited frequency modulation energy and high frequency modulation cost are avoided, and further research is needed for the frequency stabilization of the support system to the greatest extent.
Therefore, a system frequency stabilization control method considering the frequency modulation energy constraint of new energy is needed.
Disclosure of Invention
The invention provides a system frequency stability control method and system considering new energy frequency modulation energy constraint, which aims to solve the problem of how to efficiently realize the frequency stability control of a new energy system.
In order to solve the above problems, according to an aspect of the present invention, there is provided a system frequency stabilization control method considering a new energy frequency modulation energy constraint, the method comprising:
calculating the arrival time of the lowest frequency point of the system under the active disturbance;
judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not, and obtaining a judging result;
when the judging result indicates that the frequency stabilization energy balance criterion is not met, determining available frequency modulation energy of each new energy station;
and adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in sequence from small to large according to the available frequency modulation energy, and stopping the system until the frequency modulation stabilization requirement is met, thereby completing the system frequency stabilization control.
Preferably, wherein the computing system includes:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the disturbance power; />Is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
Preferably, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
Preferably, wherein said determining available frequency modulation energy for each new energy station comprises:
，
wherein ,the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station; />Is a time interval.
Preferably, wherein the fm stabilization requirement comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
According to another aspect of the present invention, there is provided a system frequency stabilization control system considering new energy frequency modulation energy constraint, the system comprising:
the frequency minimum point arrival time determining unit is used for calculating the frequency minimum point arrival time of the system under the active disturbance;
the judging unit is used for judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not and obtaining a judging result;
an available frequency modulation energy determining unit, configured to determine available frequency modulation energy of each new energy station when the determination result indicates that the frequency stabilization energy balance criterion is not satisfied;
and the frequency stability control unit is used for sequentially adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in the last period of the arrival time of the lowest frequency point according to the order from small to large of the available frequency modulation energy until the frequency modulation stability requirement is met, and stopping to finish the frequency stability control of the system.
Preferably, the frequency nadir arrival time determining unit calculates a frequency nadir arrival time of the system under the active disturbance, including:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />Is one timeFrequency modulation response time; />Is the disturbance power; />Is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
Preferably, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
Preferably, the available frequency modulation energy determining unit determines available frequency modulation energy of each new energy station, including:
，
wherein , the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station; />Is a time interval.
Preferably, wherein the fm stabilization requirement comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
Based on another aspect of the present invention, the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a step of any one of the system frequency stabilization control methods taking into account the energy constraint of the new energy source frequency modulation.
Based on another aspect of the present invention, the present invention provides an electronic device, including:
the computer readable storage medium as described above; and
one or more processors configured to execute the programs in the computer-readable storage medium.
The invention provides a system frequency stability control method and system considering new energy frequency modulation energy constraint, comprising the following steps: calculating the arrival time of the lowest frequency point of the system under the active disturbance; judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not, and obtaining a judging result; when the judging result indicates that the frequency stabilization energy balance criterion is not met, determining available frequency modulation energy of each new energy station; and adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in sequence from small to large according to the available frequency modulation energy, and stopping the system until the frequency modulation stabilization requirement is met, thereby completing the system frequency stabilization control. The invention can equivalent the frequency stabilization to the problem of the balance of disturbance energy and frequency modulation energy from the energy perspective, then equivalent the contribution of new energy frequency modulation to the frequency to the energy square, ensure the frequency stabilization through the superposition discrimination of the energy square, simultaneously minimize the requirement for the new energy frequency modulation energy, and can provide reference and reference for the discrimination of the regional and provincial system frequency stabilization and the time sequence of the new energy station participating in frequency modulation.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
FIG. 1 is a flow chart of a system frequency stabilization control method 100 that considers new energy FM energy constraints in accordance with an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a system frequency stabilization control system 200 according to an embodiment of the present invention, which considers the energy constraint of new energy frequency modulation.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flowchart of a system frequency stabilization control method 100 that considers new energy fm energy constraints according to an embodiment of the invention. As shown in fig. 1, the system frequency stability control method considering new energy frequency modulation energy constraint provided by the embodiment of the invention can be used for equivalently converting frequency stability into the problem of balance between disturbance energy and frequency modulation energy from the energy perspective, then equivalently converting the contribution of new energy frequency modulation to frequency into energy blocks, and guaranteeing the frequency stability by overlapping and distinguishing the energy blocks, and simultaneously minimizing the requirement on the new energy frequency modulation energy, thereby providing reference and reference for distinguishing the frequency stability of a regional and provincial system and participating in frequency modulation time sequence of a new energy station. The system frequency stability control method 100 taking into consideration new energy frequency modulation energy constraint provided by the embodiment of the invention starts from step 101, and calculates the frequency minimum point arrival time of the system under active disturbance at step 101.
Preferably, wherein the computing system includes:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows ，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the disturbance power; />Is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
In the invention, the frequency modulation output of the synchronous machine is subjected to linearization characterization, and the arrival time of the frequency minimum point of the system under a certain active disturbance is calculated by adopting a piecewise approximation method。
The output linearization of the synchronous machine is characterized in that:
，
wherein R is the maximum power of primary frequency modulation,for primary frequency modulation response time, the arrival time of the lowest frequency point under the maximum disturbance in the traditional power system which is dominant by the synchronous machine is approximately 10s.
Discretizing the time t to makeEach time interval is +.>N+1 periods in total, a period of gradually increasing t, when the period in which t is located satisfies the following formula ++>The frequency nadir arrival time is:
，
in the formula ,for disturbance power, +.>Is a damping coefficient, comprising load damping and electric damping in the system, < ->For maximum frequency deviation allowed under disturbance, +.>Is the frequency nadir arrival time.
In step 102, it is determined whether the arrival time of the lowest frequency point meets a frequency stabilization energy balance criterion, and a determination result is obtained.
Preferably, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time;is the damping coefficient.
And in step 103, when the judging result indicates that the frequency stabilization energy balance criterion is not met, determining available frequency modulation energy of each new energy station.
Preferably, wherein said determining available frequency modulation energy for each new energy station comprises:
，
wherein ,the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station; />Is a time interval.
And step 104, adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in sequence from small to large according to the available frequency modulation energy until the time period of reaching the lowest frequency point reaches the time, stopping until the frequency modulation stabilization requirement is met, and completing the frequency stabilization control of the system.
Preferably, wherein the fm stabilization requirement comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
In the invention, whether the arrival time of the lowest frequency point under large disturbance meets the requirement is judged according to the frequency stability energy balance criterion. Wherein, the frequency stabilization energy balance criterion is:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time;is the damping coefficient.
If the frequency does not meet the requirement, calculating the available frequency modulation energy of each new energy station iEach new energy station satisfies the frequency modulation energy constraint +.>The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>And the output power of the ith new energy station.
Then the available frequency modulation energy is sequenced from small to large, and then I new energy frequency modulation stations are sequenced in the last period of time when the frequency minimum point arrivesAdding the frequency modulation sequences in sequence in time intervals until the formula is satisfied:
，
and determining that the frequency stability requirement is met, and finishing the frequency stability control.
The method is based on the frequency stabilization framework of energy balance, can realize the on-line evaluation and prevention control of frequency stabilization, has higher engineering applicability, can effectively support the establishment of the operation mode of a power grid company and the arrangement of units, and ensures the frequency safety of the power grid; according to the invention, the time of the new energy participating in frequency modulation is optimized, the frequency modulation capability of the synchronous unit is released to the greatest extent, the standby energy of the new energy participating in frequency modulation is minimized, the problem of the traditional frequency modulation energy deficiency after the high-proportion new energy is accessed is solved, the risk of system frequency instability is reduced, meanwhile, the technical requirement for the frequency modulation of the new energy is provided from the system angle, and the new energy frequency modulation resource (energy) required by the system frequency stabilization can be evaluated.
Fig. 2 is a schematic structural diagram of a system frequency stabilization control system 200 according to an embodiment of the present invention, which considers the energy constraint of new energy frequency modulation. As shown in fig. 2, a system frequency stabilization control system 200 according to an embodiment of the present invention, which considers a new energy fm energy constraint, includes: a frequency nadir arrival time determination unit 201, a judgment unit 202, an available frequency modulation energy determination unit 203, and a frequency stabilization control unit 204.
Preferably, the frequency nadir arrival time determining unit 201 is configured to calculate a frequency nadir arrival time of the system under the active disturbance.
Preferably, the frequency nadir arrival time determining unit 201 calculates a frequency nadir arrival time of the system under the active disturbance, including:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the disturbance power; />Is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
Preferably, the determining unit 202 is configured to determine whether the arrival time of the lowest frequency point meets a frequency stability energy balance criterion, and obtain a determination result.
Preferably, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
Preferably, the available frequency modulation energy determining unit 203 is configured to determine available frequency modulation energy of each new energy station when the determination result indicates that the frequency stabilization energy balance criterion is not satisfied.
Preferably, the available frequency modulation energy determining unit 203 determines available frequency modulation energy of each new energy station, including:
，
wherein ,the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station; />Is a time interval.
Preferably, the frequency stabilization control unit 204 is configured to sequentially add the available frequency modulation energy of the new energy station to the frequency modulation sequence in the last period of the arrival time of the lowest frequency point in order from small to large, until stopping when the frequency modulation stabilization requirement is met, and complete the system frequency stabilization control.
Preferably, wherein the fm stabilization requirement comprises:
，
wherein ,Is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
The system frequency stabilization control system 200 according to the embodiment of the present invention, which considers the new energy fm energy constraint, corresponds to the system frequency stabilization control method 100 according to another embodiment of the present invention, which considers the new energy fm energy constraint, and is not described herein.
Based on another aspect of the present invention, the present invention provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a step of any one of the system frequency stabilization control methods taking into account the energy constraint of the new energy source frequency modulation.
Based on another aspect of the present invention, the present invention provides an electronic device, including:
the computer readable storage medium as described above; and
one or more processors configured to execute the programs in the computer-readable storage medium.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed are equally possible within the scope of the invention.
In general, all terms used in the present invention are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
It will be appreciated by those skilled in the art that 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, and any modifications and equivalents are intended to be included within the scope of the invention.
Claims (12)
1. A system frequency stability control method considering new energy frequency modulation energy constraint, the method comprising:
calculating the arrival time of the lowest frequency point of the system under the active disturbance;
judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not, and obtaining a judging result;
when the judging result indicates that the frequency stabilization energy balance criterion is not met, determining available frequency modulation energy of each new energy station;
and adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in sequence from small to large according to the available frequency modulation energy, and stopping the system until the frequency modulation stabilization requirement is met, thereby completing the system frequency stabilization control.
2. The method of claim 1, wherein calculating a frequency nadir arrival time of the system at the active disturbance comprises:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the disturbance power; is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
3. The method of claim 1, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system;allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
4. The method of claim 1, wherein said determining available fm energy for each new energy station comprises:
，
wherein ,the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station;is a time interval.
5. The method of claim 1, wherein the fm stabilization requirement comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
6. A system frequency stabilization control system taking into account new energy frequency modulation energy constraints, the system comprising:
the frequency minimum point arrival time determining unit is used for calculating the frequency minimum point arrival time of the system under the active disturbance;
the judging unit is used for judging whether the arrival time of the lowest frequency point meets the frequency stability energy balance criterion or not and obtaining a judging result;
an available frequency modulation energy determining unit, configured to determine available frequency modulation energy of each new energy station when the determination result indicates that the frequency stabilization energy balance criterion is not satisfied;
and the frequency stability control unit is used for sequentially adding the available frequency modulation energy of the new energy station into the frequency modulation sequence in the last period of the arrival time of the lowest frequency point according to the order from small to large of the available frequency modulation energy until the frequency modulation stability requirement is met, and stopping to finish the frequency stability control of the system.
7. The system according to claim 6, wherein the frequency nadir arrival time determination unit calculates a frequency nadir arrival time of the system under active disturbance, comprising:
discretizing the time t into n+1 time periods, wherein the time interval of each time period is as follows，/>The period of time of step up t is increased, and the frequency nadir arrival time is determined based on the following formula, including:
，
wherein ,the frequency nadir arrival time; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the disturbance power; />Is a damping coefficient; />Allowing a maximum frequency deviation for the disturbance; /> and />The end time of the first period and the end time of the second period, respectively.
8. The system of claim 6, wherein the frequency stabilization energy balance criterion comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; m is the inertia of a synchronous machine started in the system;allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time; />Is the damping coefficient.
9. The system of claim 6, wherein the available energy modulation determining unit determines available energy modulation for each new energy station, comprising:
，
wherein ,the available frequency modulation energy for the ith new energy station; />The output power of the ith new energy station;is a time interval.
10. The system of claim 6, wherein the fm stabilization requirement comprises:
，
wherein ,is the disturbance power; />The frequency nadir arrival time; i is the number of new energy stations added with the frequency modulation sequence; />The available frequency modulation energy for the ith new energy station; m is the inertia of a synchronous machine started in the system; />Allowing a maximum frequency deviation for the disturbance; r is the maximum primary frequency modulation power; />The primary frequency modulation response time;/>is the damping coefficient.
11. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any of claims 1-5.
12. An electronic device, comprising:
the computer readable storage medium recited in claim 11; and
one or more processors configured to execute the programs in the computer-readable storage medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310706307.2A CN116454922B (en) | 2023-06-15 | 2023-06-15 | System frequency stability control method and system considering new energy frequency modulation energy constraint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310706307.2A CN116454922B (en) | 2023-06-15 | 2023-06-15 | System frequency stability control method and system considering new energy frequency modulation energy constraint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116454922A true CN116454922A (en) | 2023-07-18 |
| CN116454922B CN116454922B (en) | 2023-09-01 |
Family
ID=87130574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310706307.2A Active CN116454922B (en) | 2023-06-15 | 2023-06-15 | System frequency stability control method and system considering new energy frequency modulation energy constraint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116454922B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105303267A (en) * | 2015-11-20 | 2016-02-03 | 武汉大学 | Combination optimizing method, considering dynamic frequency constraint, for isolated power grid set comprising high-permeability photovoltaic power supply |
| CN110445194A (en) * | 2019-07-25 | 2019-11-12 | 国家电网公司华中分部 | One kind being based on water, thermoelectricity different proportion Primary frequency control ability optimization method |
| CN112803486A (en) * | 2021-03-25 | 2021-05-14 | 国网吉林省电力有限公司电力科学研究院 | Unit combination optimization method considering dynamic frequency constraint under wind power integration |
| CN114552598A (en) * | 2021-12-28 | 2022-05-27 | 上海电力大学 | Optimal scheduling method for realizing frequency safety constraint by considering source load frequency modulation resources |
| CN115276008A (en) * | 2022-09-28 | 2022-11-01 | 国网湖北省电力有限公司经济技术研究院 | Power system new energy bearing capacity assessment method considering peak-shaving frequency-modulation requirements |
| CN115441510A (en) * | 2022-10-20 | 2022-12-06 | 清华四川能源互联网研究院 | Method and system for adjusting frequency modulation parameters of new energy station |
| CN115800308A (en) * | 2022-10-18 | 2023-03-14 | 山东大学 | New energy primary frequency modulation coefficient correction method and system considering frequency modulation dead zone |
-
2023
- 2023-06-15 CN CN202310706307.2A patent/CN116454922B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105303267A (en) * | 2015-11-20 | 2016-02-03 | 武汉大学 | Combination optimizing method, considering dynamic frequency constraint, for isolated power grid set comprising high-permeability photovoltaic power supply |
| CN110445194A (en) * | 2019-07-25 | 2019-11-12 | 国家电网公司华中分部 | One kind being based on water, thermoelectricity different proportion Primary frequency control ability optimization method |
| CN112803486A (en) * | 2021-03-25 | 2021-05-14 | 国网吉林省电力有限公司电力科学研究院 | Unit combination optimization method considering dynamic frequency constraint under wind power integration |
| CN114552598A (en) * | 2021-12-28 | 2022-05-27 | 上海电力大学 | Optimal scheduling method for realizing frequency safety constraint by considering source load frequency modulation resources |
| CN115276008A (en) * | 2022-09-28 | 2022-11-01 | 国网湖北省电力有限公司经济技术研究院 | Power system new energy bearing capacity assessment method considering peak-shaving frequency-modulation requirements |
| CN115800308A (en) * | 2022-10-18 | 2023-03-14 | 山东大学 | New energy primary frequency modulation coefficient correction method and system considering frequency modulation dead zone |
| CN115441510A (en) * | 2022-10-20 | 2022-12-06 | 清华四川能源互联网研究院 | Method and system for adjusting frequency modulation parameters of new energy station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116454922B (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5664889B1 (en) | Inertia control method of wind power generator based on time-varying droop | |
| EP3540896A1 (en) | Method and apparatus for primary frequency control of wind power generator | |
| AU2017404568C1 (en) | Method and device for controlling output power of a wind turbine | |
| JP6476353B2 (en) | Power plant ramp rate control | |
| CN110635521B (en) | Fair coordination control method and system based on electric quantity and reserve capacity | |
| CN111030137A (en) | Power grid frequency prediction method and device with load participating in primary frequency modulation | |
| CN116454922B (en) | System frequency stability control method and system considering new energy frequency modulation energy constraint | |
| CN109861238B (en) | Automatic power generation and voltage coordination control method, system and medium for energy storage power station | |
| CN110994589B (en) | Online evaluation method and system for frequency modulation capability of power electronic access power system | |
| CN104820616A (en) | Task scheduling method and device | |
| CN106708618A (en) | Process scheduling method and device | |
| CN110838735B (en) | Unit adjusting method and device comprising power supply section partition | |
| CN108110779A (en) | Energy-storage system is to the response method of plant load deviation in a kind of power station | |
| CN112653151B (en) | Method and system for adjusting power grid power flow based on reactive compensation device | |
| JPWO2021220488A5 (en) | ||
| CN108879764B (en) | Robust optimization method and system for inhibiting wind photovoltaic uncertainty | |
| CN108268310B (en) | Method and device for determining minimum scheduling granularity | |
| CN107181255B (en) | Method and device for adjusting out-of-limit electric quantity of unit | |
| CN112838592A (en) | Load-source coordinated day-ahead scheduling method, device and system | |
| Li et al. | Multi-period do-not-exceed limit for variable renewable generation dispatch considering discrete recourse controls | |
| CN116345451B (en) | Operation control method and device for variable frequency temperature control load and terminal equipment | |
| CN114164313B (en) | Converter tilting control method and system | |
| CN115459366B (en) | Control method of unit in power system, storage medium and electronic equipment | |
| CN115498641B (en) | Decision control method and system based on new energy multi-field station short circuit ratio | |
| CN112540633B (en) | Temperature control method, device, equipment and medium |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |