CN115811070A - Flywheel energy storage self-adaptive capacity configuration method and system for assisting thermal power generating unit in frequency modulation - Google Patents
Flywheel energy storage self-adaptive capacity configuration method and system for assisting thermal power generating unit in frequency modulation Download PDFInfo
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Abstract
The invention discloses a flywheel energy storage self-adaptive capacity configuration method and system for assisting in frequency modulation of a thermal power generating unit, and relates to the technical field of flywheel energy storage. After the frequency modulation command signal is subjected to empirical mode decomposition to obtain a plurality of eigenmode function components, when the signal is reconstructed, an optimal reconstruction scheme is selected according to the effect evaluation indexes of frequency modulation of the energy storage combined thermal power generating unit under different combinations, the reconstructed signal is respectively distributed to the thermal power generating unit and the flywheel energy storage system to respond, the rated power and the rated capacity are calculated according to the power time sequence component distributed to the flywheel energy storage system, and the self-adaptive capacity configuration of the flywheel energy storage is realized.
Description
Technical Field
The invention relates to the technical field of flywheel energy storage, in particular to a flywheel energy storage self-adaptive capacity configuration method and system for assisting frequency modulation of a thermal power generating unit.
Background
Due to the intermittence and the fluctuation of the output of new energy such as wind power, photovoltaic energy and the like, the characteristic and the regulation and control of the fluctuation of the power grid frequency are increasingly complex. The gap between the power operation control of the existing thermal power generating unit and the power grid development requirement is gradually increased, and the requirements on the consumption of new energy such as photovoltaic energy, wind power energy and the like and the stability and the economy of a power system under the high-proportion new energy permeability cannot be met.
The method for improving the frequency modulation effect of the power grid by utilizing the energy storage arranged on the power generation side and the generator set is proved to be an effective method. The flywheel energy storage has the characteristics of instantaneous response, accurate tracking and bidirectional output, has remarkable technical advantages in the aspect of participating in power grid frequency modulation, has economic feasibility, can provide capacity support and flexible regulation capacity for a novel power system, and promotes energy clean low-carbon transformation. The application of the flywheel energy storage technology in the aspect of power grid frequency modulation is promoted, capacity optimization configuration is an important subject, reasonable capacity optimization configuration can maximize frequency modulation benefits on the basis of meeting the power grid frequency modulation requirements, and the problem that the energy storage auxiliary frequency modulation project of each large power generation plant is firstly considered in the construction process at present is solved. However, for the problem of capacity configuration optimization of frequency modulation of a flywheel energy storage-assisted thermal power generating unit, most of current researches are limited to establishing a full-life-cycle objective function and selecting an intelligent optimization algorithm to find an optimal solution, evaluation indexes of a frequency modulation effect are not considered enough, and when a frequency modulation signal is decomposed and reconstructed, the selection of the decomposition frequency is greatly influenced by human factors, and a scientific decomposition principle does not exist.
Disclosure of Invention
The invention aims to provide a flywheel energy storage self-adaptive capacity configuration method and system for assisting the frequency modulation of a thermal power generating unit so as to realize the flywheel energy storage self-adaptive capacity configuration.
In order to achieve the purpose, the invention provides the following scheme:
a flywheel energy storage self-adaptive capacity configuration method for assisting thermal power generating unit frequency modulation comprises the following steps:
acquiring a historical primary frequency modulation power instruction sequence;
performing empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components;
when each eigenmode function component is used as a boundary frequency, the eigenmode function component of a frequency band above the boundary frequency is used as a power instruction of the flywheel energy storage system, and the eigenmode function component of the frequency band below the boundary frequency and the boundary frequency is used as a power instruction of the thermal power generating unit, so that various distribution schemes are obtained;
simulating a plurality of distribution schemes one by one in a regional power grid frequency modulation simulation model, wherein each distribution scheme is a power grid frequency deviation signal;
determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme;
selecting a distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as an optimal signal reconstruction scheme;
and determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
A flywheel energy storage self-adaptive capacity configuration system for assisting thermal power generating unit frequency modulation comprises:
the historical data acquisition module is used for acquiring a historical primary frequency modulation power instruction sequence;
the decomposition module is used for carrying out empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components;
the distribution module is used for taking the eigenmode function component of a frequency band above the demarcation frequency as a power instruction of the flywheel energy storage system and taking the eigenmode function component of the frequency band below the demarcation frequency and the demarcation frequency as a power instruction of the thermal power generating unit when each eigenmode function component is taken as the demarcation frequency, so that various distribution schemes are obtained;
the simulation module is used for simulating a plurality of distribution schemes one by one in a regional power grid frequency modulation simulation model, and each distribution scheme is used for generating a power grid frequency deviation signal;
the evaluation index determining module is used for determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme;
the optimal scheme selection module is used for selecting the distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as an optimal signal reconstruction scheme;
and the capacity configuration module is used for determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a flywheel energy storage self-adaptive capacity configuration method and system for assisting a thermal power generating unit in frequency modulation, wherein after a frequency modulation command signal is subjected to empirical mode decomposition to obtain a plurality of eigenmode function components, an optimal reconstruction scheme is selected according to effect evaluation indexes of energy storage combined thermal power generating unit frequency modulation under different combinations during signal reconstruction, reconstructed signals are respectively distributed to the thermal power generating unit and a flywheel energy storage system to respond, rated power and rated capacity are calculated according to power time sequence components distributed to the flywheel energy storage system, and self-adaptive capacity configuration of flywheel energy storage is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a flowchart of a flywheel energy storage adaptive capacity configuration method for assisting in frequency modulation of a thermal power generating unit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a flywheel energy storage adaptive capacity allocation method for assisting in frequency modulation of a thermal power generating unit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a frequency modulation simulation model of a regional power grid according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a flywheel energy storage self-adaptive capacity configuration method and system for assisting the frequency modulation of a thermal power generating unit so as to realize the flywheel energy storage self-adaptive capacity configuration.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 and fig. 2, the present invention provides a flywheel energy storage adaptive capacity configuration method for assisting a thermal power generating unit in frequency modulation. Considering that EMD (empirical mode decomposition) is carried out on a frequency modulation command signal to obtain a plurality of IMF (intrinsic mode functions), when the signal is reconstructed, an optimal reconstruction scheme is selected according to the effect evaluation indexes of frequency modulation of the energy storage combined thermal power generating unit under different combinations, the reconstructed signal is respectively distributed to the thermal power generating unit and the flywheel energy storage system to respond, according to the power time sequence component distributed to the flywheel energy storage system, the maximum charge and discharge power is calculated to serve as the rated power, and the average charge and discharge power within continuous 60s is calculated to serve as the rated capacity.
The embodiment of the invention provides a flywheel energy storage self-adaptive capacity configuration method for assisting frequency modulation of a thermal power generating unit, which comprises the following steps of:
step S1, a historical primary frequency modulation power instruction sequence is obtained.
Acquiring historical data P of primary frequency modulation power instruction through DCS (Distributed Control System) t 。
And S2, carrying out empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components.
The EMD algorithm is a method applied to processing non-stationary signals, and can decompose original complex signals to obtain m eigenmode function components PIMF 1 ，PIMF 2 ，PIMF 3 ，…，PIMF 7 (example m =7 here, which is optional), these components contain local feature signals of different time scales of the original signal.
And S3, when each eigenmode function component is used as a boundary frequency, the eigenmode function component of the frequency band above the boundary frequency is used as a power instruction of the flywheel energy storage system, and the eigenmode function components of the frequency band below the boundary frequency and the boundary frequency are used as power instructions of the thermal power generating unit, so that various distribution schemes are obtained.
Taking m =7 given in the above step as an example, for 7 decomposed components, selecting each component as a boundary frequency, 6 reconstruction schemes can be obtained as shown in table 1.
Table 1 reconstruction scheme
| Scheme(s) | P IMF1 | P IMF2 | P IMF3 | P IMF4 | P IMF5 | P IMF6 | P IMF7 |
| 1 | H | L | L | L | L | L | L |
| 2 | H | H | L | L | L | L | L |
| 3 | H | H | H | L | L | L | L |
| 4 | H | H | H | H | L | L | L |
| 5 | H | H | H | H | H | L | L |
| 6 | H | H | H | H | H | H | L |
In table 1, H and L represent that the corresponding components participate in the recombination of the high-frequency and low-frequency components, respectively, and the finally obtained instruction component P of the frequency band above the demarcation frequency H Component P of command signal assigned to frequency band of flywheel energy storage, dividing frequency and below L And distributing to a traditional thermal power generating unit. Wherein, P H >0 represents flywheel energy storage system discharge. As can be seen from Table 1, scheme 1 is represented by P IMF2 For dividing the frequency, the 2 nd scheme uses P IMF3 For the demarcation frequency, \ 8230, scheme 6 is P IMF7 Is the demarcation frequency.
And S4, simulating the distribution schemes one by one in a regional power grid frequency modulation simulation model, wherein each distribution scheme is a power grid frequency deviation signal.
The frequency modulation simulation model of the regional power grid is established as shown in fig. 3. In FIG. 3, P t Historical data of the primary frequency modulation power instruction is obtained; p H The power instruction is distributed to the flywheel energy storage system after signal reconstruction; p L The power command is distributed to the thermal power generating unit after the signal is reconstructed; the power signal decomposition and reconstruction module is the content of the step S2 to the step S3; the speed regulator, the steam turbine, the flywheel energy storage and the generator-load model are common models for power system frequency modulation simulation. The method comprises the steps that after a flywheel energy storage system responds to a power instruction of the flywheel energy storage system, first power is output; the thermal power generating unit outputs second power after responding to a power instruction of the thermal power generating unit; the generator-load model is used for outputting a power grid frequency deviation signal by taking the sum of the first power and the second power and subtracting the value after the primary frequency modulation power command sequence as input.
After the high and low frequency components are distributed, the flywheel and the thermal power generating unit respectively respond, and the multiple distribution schemes obtained in the step S3 are simulated in the regional power grid simulation model one by one to obtain a power grid frequency deviation signal delta f under each group of schemes.
And S5, determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme.
The calculation formula of the primary frequency modulation effect evaluation index is as follows:
in the formula, J 1 Is a primary frequency modulation effect evaluation index delta f under a dispensing scheme i And k is a power grid frequency deviation signal obtained at the moment i under a distribution scheme, and is the total moment.
And S6, selecting the distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as the optimal signal reconstruction scheme.
Optimum effect (evaluation) with primary frequency modulationIndex J 1 Minimum) to select a demarcation frequency, determine a signal reconstruction scheme, P in the reconstruction scheme H Used as the flywheel energy storage system power command in the following steps.
And S7, determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
(1) Rated power P b Determining
For flywheel energy storage system power instruction P H And calculating rated power, wherein the rated power is required to meet the power command at each moment. The calculation formula is as follows:
P b ＝max(P HP (t))
in the formula, P b For the rated power, P, of flywheel energy storage systems HP (t) the actual power to be reached by the flywheel energy storage system at the moment t; p H (t) flywheel energy storage System Power command at time t, P H (t)>0 represents the flywheel energy storage system discharge, P H (t)<0 represents energy storage system charging; eta is the charge-discharge efficiency (generally 0.95) of the flywheel energy storage system; t belongs to m, and m is a power instruction P of the flywheel energy storage system H The length of the time series. P is b Unit of (d) is MW.
(2) Rated capacity E b Determining
For the primary frequency modulation, the power grid examines the integral electric quantity, and whether the integral electric quantity meets the requirement of the power grid within 60s after a primary frequency modulation instruction is examined, so that when the rated capacity of the flywheel energy storage system is configured, the integral electric quantity in each period (60 s) is calculated by using a sliding window, and the maximum value of the accumulated capacity is used as the configured rated capacity of the flywheel energy storage system. The calculation formula is as follows:
in the formula, E b The rated capacity of the flywheel energy storage system is obtained, n is the step length of a sliding window, n<60。E b Has the unit of MW/h.
The invention has the technical advantages that:
(1) processing the primary frequency modulation instruction by using an EMD decomposition algorithm, and reasonably reconstructing by combining respective characteristics of the unit and the stored energy to realize reasonable distribution of the frequency modulation instruction;
(2) a capacity configuration strategy of a reconstruction scheme is selected in a self-adaptive manner according to the frequency modulation effect evaluation index, so that the subjective factor of artificially selecting the boundary frequency is avoided;
(3) the method has the advantages that the frequency modulation effect is maximized, meanwhile, the power and capacity allocation scheme is obtained through calculation through statistical analysis of the power of the flywheel energy storage system, and the method has engineering feasibility.
The embodiment of the invention also provides a flywheel energy storage self-adaptive capacity configuration system for assisting the frequency modulation of a thermal power generating unit, which comprises the following steps:
the historical data acquisition module is used for acquiring a historical primary frequency modulation power instruction sequence;
the decomposition module is used for carrying out empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components;
the distribution module is used for taking the eigenmode function component of the frequency band above the dividing frequency as a power instruction of the flywheel energy storage system and taking the eigenmode function component of the frequency band below the dividing frequency and the dividing frequency as a power instruction of the thermal power generating unit when each eigenmode function component is taken as the dividing frequency, so that various distribution schemes are obtained;
the simulation module is used for simulating a plurality of distribution schemes one by one in a regional power grid frequency modulation simulation model, and each distribution scheme is used for generating a power grid frequency deviation signal;
the evaluation index determining module is used for determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme;
the optimal scheme selection module is used for selecting the distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as an optimal signal reconstruction scheme;
and the capacity configuration module is used for determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
The regional power grid frequency modulation simulation model comprises: a flywheel energy storage system, a thermal power generating unit and a generator-load model;
the flywheel energy storage system is used for outputting first power after responding to a power instruction of the flywheel energy storage system;
the thermal power generating unit is used for outputting second power after responding to a power instruction of the thermal power generating unit;
and the generator-load model is used for outputting a power grid frequency deviation signal by taking the value obtained by subtracting the primary frequency modulation power instruction sequence from the sum of the first power and the second power as an input.
The calculation formula of the primary frequency modulation effect evaluation index is
In the formula, J 1 Is a primary frequency modulation effect evaluation index delta f under a dispensing scheme i The method is a power grid frequency deviation signal obtained at the moment i under a distribution scheme, and k is a total moment.
The rated power of the flywheel energy storage system is calculated by the formula
P b ＝max(P HP (t))
In the formula, P b For the rated power, P, of flywheel energy storage systems HP (t) the actual power to be reached by the flywheel energy storage system at the moment t; p H (t) flywheel energy storage System Power command, P, at time t H (t)>0 represents the flywheel energy storage system discharge, P H (t)<0 represents energy storage system charging; eta is the charge-discharge efficiency of the flywheel energy storage system; t belongs to m, and m is a power instruction P of the flywheel energy storage system H The length of the time series.
The rated capacity of the flywheel energy storage system is calculated by the formula
In the formula, E b Is the rated capacity of the flywheel energy storage system, n is the step length of the sliding window, n<60。
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the description of the method part.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A flywheel energy storage self-adaptive capacity configuration method for assisting thermal power generating unit frequency modulation is characterized by comprising the following steps:
acquiring a historical primary frequency modulation power instruction sequence;
performing empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components;
when each eigenmode function component is used as a boundary frequency, the eigenmode function component of a frequency band above the boundary frequency is used as a power instruction of the flywheel energy storage system, and the eigenmode function components of the frequency band below the boundary frequency and the boundary frequency are used as power instructions of the thermal power generating unit to obtain various distribution schemes;
simulating a plurality of distribution schemes one by one in a regional power grid frequency modulation simulation model, wherein each distribution scheme is a power grid frequency deviation signal;
determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme;
selecting a distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as an optimal signal reconstruction scheme;
and determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
2. The method for configuring the flywheel energy storage adaptive capacity for assisting the thermal power generating unit in frequency modulation according to claim 1, wherein the regional power grid frequency modulation simulation model comprises: a flywheel energy storage system, a thermal power generating unit and a generator-load model;
the flywheel energy storage system is used for outputting first power after responding to a power instruction of the flywheel energy storage system;
the thermal power generating unit is used for outputting second power after responding to a power instruction of the thermal power generating unit;
and the generator-load model is used for outputting a power grid frequency deviation signal by taking the value obtained by subtracting the primary frequency modulation power instruction sequence from the sum of the first power and the second power as an input.
3. The flywheel energy storage self-adaptive capacity configuration method for assisting in frequency modulation of thermal power generating unit according to claim 1, wherein a calculation formula of the primary frequency modulation effect evaluation index is
In the formula, J 1 Is a primary frequency modulation effect evaluation index, delta f, under a dispensing scheme i The method is a power grid frequency deviation signal obtained at the moment i under a distribution scheme, and k is a total moment.
4. The flywheel energy storage self-adaptive capacity configuration method for assisting in frequency modulation of thermal power generating unit according to claim 1, wherein a calculation formula of rated power of the flywheel energy storage system is
P b ＝max(P HP (t))
In the formula, P b For the rated power, P, of flywheel energy storage systems HP (t) the actual power to be reached by the flywheel energy storage system at the moment t; p is H (t) flywheel energy storage System Power command at time t, P H (t)>0 represents the flywheel energy storage system discharge, P H (t)<0 represents energy storage system charging; eta is the charge-discharge efficiency of the flywheel energy storage system; t belongs to m, and m is a power instruction P of the flywheel energy storage system H The length of the time series.
5. The method for configuring flywheel energy storage adaptive capacity for assisting in frequency modulation of thermal power generating unit according to claim 4, wherein a calculation formula of rated capacity of the flywheel energy storage system is that
In the formula, E b Is the rated capacity of the flywheel energy storage system, n is the step length of the sliding window, n<60。
6. The utility model provides a flywheel energy storage self-adaptation capacity configuration system of supplementary thermal power unit frequency modulation which characterized in that includes:
the historical data acquisition module is used for acquiring a historical primary frequency modulation power instruction sequence;
the decomposition module is used for carrying out empirical mode decomposition on the primary frequency modulation power instruction sequence to obtain a plurality of eigenmode function components;
the distribution module is used for taking the eigenmode function component of the frequency band above the dividing frequency as a power instruction of the flywheel energy storage system and taking the eigenmode function component of the frequency band below the dividing frequency and the dividing frequency as a power instruction of the thermal power generating unit when each eigenmode function component is taken as the dividing frequency, so that various distribution schemes are obtained;
the simulation module is used for simulating a plurality of distribution schemes one by one in a regional power grid frequency modulation simulation model, and each distribution scheme is used for generating a power grid frequency deviation signal;
the evaluation index determining module is used for determining a primary frequency modulation effect evaluation index under each distribution scheme according to the power grid frequency deviation signal under each distribution scheme;
the optimal scheme selection module is used for selecting the distribution scheme corresponding to the minimum primary frequency modulation effect evaluation index as an optimal signal reconstruction scheme;
and the capacity configuration module is used for determining the rated power and the rated capacity of the flywheel energy storage system according to the power instruction of the flywheel energy storage system in the optimal signal reconstruction scheme.
7. The system for configuring flywheel energy storage adaptive capacity for assisting in frequency modulation of a thermal power generating unit according to claim 6, wherein the regional power grid frequency modulation simulation model comprises: a flywheel energy storage system, a thermal power generating unit and a generator-load model;
the flywheel energy storage system is used for responding to a power instruction of the flywheel energy storage system and then outputting first power;
the thermal power generating unit is used for outputting second power after responding to a power instruction of the thermal power generating unit;
and the generator-load model is used for outputting a power grid frequency deviation signal by taking the value obtained by subtracting the primary frequency modulation power instruction sequence from the sum of the first power and the second power as an input.
8. The flywheel energy storage self-adaptive capacity configuration system for assisting in frequency modulation of thermal power generating unit according to claim 6, wherein a calculation formula of the primary frequency modulation effect evaluation index is
In the formula, J 1 Is a primary frequency modulation effect evaluation index, delta f, under a dispensing scheme i And k is a power grid frequency deviation signal obtained at the moment i under a distribution scheme, and is the total moment.
9. The flywheel energy storage self-adaptive capacity configuration system for assisting in frequency modulation of thermal power generating unit according to claim 6, wherein a calculation formula of rated power of the flywheel energy storage system is
P b ＝max(P HP (t))
In the formula, P b For the rated power, P, of flywheel energy storage systems HP (t) the actual power to be reached by the flywheel energy storage system at the moment t; p H (t) flywheel energy storage System Power command at time t, P H (t)>0 represents the flywheel energy storage system discharge, P H (t)<0 represents energy storage system charging; eta is the charge-discharge efficiency of the flywheel energy storage system; t belongs to m, and m is a power instruction P of the flywheel energy storage system H The length of the time series.
10. The system for configuring the self-adaptive capacity of the flywheel energy storage for assisting the frequency modulation of the thermal power generating unit according to claim 9, wherein the calculation formula of the rated capacity of the flywheel energy storage system is as follows
In the formula, E b The rated capacity of the flywheel energy storage system is obtained, n is the step length of a sliding window, n<60。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116073414A (en) * | 2023-04-03 | 2023-05-05 | 华北电力大学 | Method and equipment for optimizing charge state range of flywheel energy storage participating in power grid frequency modulation |
| CN117713144A (en) * | 2024-02-06 | 2024-03-15 | 西安热工研究院有限公司 | Thermal power generating unit frequency modulation method and system based on molten salt energy storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116073414A (en) * | 2023-04-03 | 2023-05-05 | 华北电力大学 | Method and equipment for optimizing charge state range of flywheel energy storage participating in power grid frequency modulation |
| CN117713144A (en) * | 2024-02-06 | 2024-03-15 | 西安热工研究院有限公司 | Thermal power generating unit frequency modulation method and system based on molten salt energy storage |
| CN117713144B (en) * | 2024-02-06 | 2024-04-30 | 西安热工研究院有限公司 | Thermal power generating unit frequency modulation method and system based on molten salt energy storage |
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