Flywheel energy storage system primary frequency modulation capability evaluation method and system

Abstract

The invention relates to a flywheel energy storage system primary frequency modulation capability evaluation method and system, and the method comprises the following steps: determining the output power of a flywheel energy storage system according to a reference power value, the proportion of each array in the flywheel energy storage system, and a dynamic delay parameter of the flywheel energy storage system; superposing the output power and the power grid load variable quantity to obtain a power grid frequency variable quantity; obtaining power grid power variation according to the power grid frequency variation, and comparing and correcting the power grid power variation with a reference power value; and under the condition of only primary frequency modulation and no dependence on secondary frequency modulation, determining a ratio between a power grid load variance and a power grid frequency variance in a set time period according to a power spectrum of the input quantity, a power grid inertia time constant, dynamic delay of the energy storage system and a power grid load frequency characteristic parameter so as to measure the primary frequency modulation capability of the flywheel energy storage system.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method and system for evaluating the primary frequency regulation capability of a flywheel energy storage system. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Flywheel energy storage is a storage method that uses an electric motor to drive a flywheel to rotate at high speed, and then uses the flywheel to drive a generator to generate electricity when needed. It can absorb the frequency changes caused by unstable renewable energy sources such as wind power.

[0004] The primary frequency regulation capability of a power grid refers to the ability of the power grid to spontaneously change power when the grid frequency changes and the secondary frequency regulation does not take effect. When the load rises rapidly, if the primary frequency regulation capability of the power grid is poor and is insufficient to timely control the frequency regulation units to increase output in order to achieve a balance between power supply and demand, the grid frequency will drop and power outages will occur. In severe cases, the entire system may even collapse. The primary frequency regulation characteristics used in the prior art, from a static perspective, are expressed by the inequality of the static magnification factor between the prime mover power change and the grid frequency change. This method cannot reflect the difference in the response of the flywheel energy storage unit to different frequency components of the grid cycle, and the impact of the dynamic characteristics of different types of generator sets on the primary frequency regulation capability of the power grid, making it difficult to measure the rapid response capability of the power grid system to sudden accidents. Summary of the invention

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a method and system for evaluating the primary frequency regulation capability of a flywheel energy storage system. The method and system use the variance that measures the degree of deviation of a random variable from its mathematical expectation and describes the discrete characteristics of the distribution of random variable values. The method and system are applied to a scenario where a power grid only uses a flywheel energy storage system for primary frequency regulation and does not rely on secondary frequency regulation. The method measures the primary frequency regulation capability of the flywheel energy storage system by using the ratio between the power grid load variance and the power grid frequency variance, and demonstrates that the frequency regulation capability is related to several dynamic influencing parameters such as the power grid inertia time constant, the dynamic delay of the energy storage system, and the power grid load frequency characteristic parameters.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A first aspect of the present invention provides a method for evaluating the primary frequency regulation capability of a flywheel energy storage system, comprising the following steps:

[0008] Obtain the set reference power value, the proportion of each array of the flywheel energy storage system and the dynamic delay parameter of the flywheel energy storage system, determine the output power of the flywheel energy storage system, and superimpose it with the grid load change to obtain the grid frequency change, determine the grid power change based on the obtained grid frequency change, compare it with the reference power value and make corrections;

[0009] In the case of only primary frequency regulation and not relying on secondary frequency regulation, the ratio between the grid load variance and the grid frequency variance within a set time period is determined based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters. The primary frequency regulation capability of the flywheel energy storage system is measured based on the obtained ratio.

[0010] The frequency change of the flywheel energy storage system during the primary frequency regulation is determined based on the grid load change, the grid load frequency characteristic parameters and the dynamic delay of the flywheel energy storage system involved in the frequency regulation, as shown in the following formula:

[0011]

[0012] In the above formula, χ n (s) is the frequency variation of the power grid, χ NL (s) is the change in power grid load, β ∑ is the grid load frequency characteristic parameter, G(s) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

[0013] The random variables involved in the primary frequency modulation of the flywheel energy storage system are all zero-mean random signals. The random signals are output after the transfer function, and the variance of the output is:

[0014]

[0015] In the above formula, S x (ω) is the power spectrum of the input quantity, and H(jω) is the transfer function.

[0016] According to the relationship between the flywheel energy storage speed and the grid load, the variance of the grid frequency is obtained as shown in the following formula:

[0017]

[0018] In the above formula, T a∑ jω is the inertia time constant of the power grid, and G(jω) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

[0019] The variance of the grid load is shown in the following formula:

[0020]

[0021] Determine the ratio between the grid load variance and the grid frequency variance within a set time period to measure the primary frequency regulation capability of the flywheel energy storage system, as shown in the following formula:

[0022]

[0023] In the above formula, σ 2 χNL is the variance of the grid load, σ 2 χn is the variance of the grid frequency T a∑ jω is the grid inertia time constant, β ∑ is the grid load frequency characteristic parameter, G(jω) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

[0024] A second aspect of the present invention provides a system for implementing the above method, comprising:

[0025] The frequency modulation module is configured to: obtain a set reference power value, a proportion of each array of the flywheel energy storage system, and a dynamic delay parameter of the flywheel energy storage system, determine the output power of the flywheel energy storage system, and superimpose it with the grid load change to obtain the grid frequency change, determine the grid power change according to the obtained grid frequency change, compare it with the reference power value, and make corrections;

[0026] The evaluation module is configured to: determine the ratio between the grid load variance and the grid frequency variance within a set time period based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters when there is only primary frequency regulation and no reliance on secondary frequency regulation, and measure the primary frequency regulation capability of the flywheel energy storage system based on the obtained ratio.

[0027] A third aspect of the present invention provides a computer-readable storage medium.

[0028] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system as described above.

[0029] A fourth aspect of the present invention provides a computer device.

[0030] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system as described above are implemented.

[0031] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0032] 1. By using the variance that measures the degree of deviation of random variables from their mathematical expectations and describes the discrete characteristics of the distribution of random variable values, the ratio between the grid load variance and the grid frequency variance is used to measure the primary frequency regulation capability of the flywheel energy storage system in the scenario where the power grid only uses the flywheel energy storage system for primary frequency regulation and does not rely on secondary frequency regulation. It also shows that the frequency regulation capability is related to several dynamic influencing parameters such as the grid inertia time constant, the dynamic delay of the energy storage system, and the grid load frequency characteristic parameters, thereby reflecting the difference in the response of the flywheel energy storage unit to different frequency components of the grid cycle, as well as the impact of the dynamic characteristics of different types of generator sets on the primary frequency regulation capability of the grid, and measuring the rapid response capability of the grid system to sudden accidents.

[0033] 2. The load of the power grid includes two parts: periodic component and random component. The main task of the primary frequency regulation of the power grid is to regulate the short-period random load. Therefore, the primary frequency regulation of the flywheel energy storage system is also random and is a random process. The variance in the random process can measure the degree of deviation of the random variable from its mathematical expectation and describe the discrete characteristics of the distribution of the random variable values, thereby reflecting the amplitude of change of the random variable, and indirectly reflecting the primary frequency regulation capability of the flywheel energy storage system. The frequency regulation capability is related to the dynamic influencing factors such as the inertia time constant of the power grid, the dynamic delay of the energy storage system and the frequency characteristic parameters of the power grid load. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] Figure 1 is a schematic diagram of a characteristic curve of a regulation system in a static range provided by one or more embodiments of the present invention;

[0036] Figure 2 is a schematic diagram of the relationship between power grid frequency and time provided by one or more embodiments of the present invention;

[0037] Figure 3 It is a power output characteristic diagram of a frequency modulation unit to different grid frequency change signals provided by one or more embodiments of the present invention;

[0038] Figure 4 It is a schematic diagram of a model of primary frequency modulation dynamic characteristics of a flywheel energy storage system provided by one or more embodiments of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Primary frequency regulation capability refers to the ability of the power grid to spontaneously change power when the power grid frequency changes and the secondary frequency regulation does not take effect.

[0043] The primary frequency regulation characteristic refers to the characteristic that when the grid load changes, the demand power and the power output of the prime mover are unbalanced, causing the grid frequency to change. The regulation system controls the unit to automatically change its own output power to achieve a balance between demand and output power again, thereby limiting the change in grid frequency.

[0044] As described in the background technology, the traditional primary frequency modulation characteristic is reflected from a static perspective as a curve showing the relationship between the prime mover power and its speed (e.g. Figure 1 The primary frequency regulation characteristic is represented by the inequality of the static amplification factor between the prime mover power change and the grid frequency change.

[0045] However, using the inequality rate as the primary frequency regulation capability indicator of flywheel energy storage must meet the requirement that the speed of change of the grid frequency is much slower than the load response speed of the flywheel energy storage system, otherwise the static characteristics cannot truly reflect the actual situation. In the actual grid operation process, since the grid frequency is a random function related to time, the low-frequency component content is high and the high-frequency component content is relatively small, such as Figure 2 As shown, the system frequency contains dynamic information of various components, so the above conditions are difficult to fully meet.

[0046] In addition, the response capabilities of the frequency regulation system of the frequency regulation unit to the various components of the grid frequency are also different. Even if two frequency regulation units meet the conditions of completely identical static characteristics, there may be differences in the power output response to different grid frequency change signals, such as Figure 3 shown.

[0047] At the same time, in order to better adapt to the current situation of large-scale grid connection of wind power, when studying and analyzing the primary frequency regulation characteristics, it is necessary not only to examine the impact of the grid frequency, but also to explore the response characteristics of the flywheel energy storage system to different frequency components from a dynamic perspective, so as to more accurately describe the primary frequency regulation characteristics of the grid.

[0048] Therefore, the following embodiment provides a method and system for evaluating the primary frequency regulation capability of a flywheel energy storage system. The method and system use the variance that measures the degree to which a random variable deviates from its mathematical expectation and describes the discrete characteristics of the distribution of random variable values. The method is applied to a scenario where the power grid only uses a flywheel energy storage system for primary frequency regulation and does not rely on secondary frequency regulation. The ratio between the grid load variance and the grid frequency variance is used to measure the primary frequency regulation capability of the flywheel energy storage system, and it is demonstrated that the frequency regulation capability is related to several dynamic influencing parameters such as the grid inertia time constant, the dynamic delay of the energy storage system, and the grid load frequency characteristic parameters.

[0049] Embodiment 1:

[0050] The method for evaluating the primary frequency regulation capability of a flywheel energy storage system comprises the following steps:

[0051] The output power of the flywheel energy storage system is determined according to the reference power value, the proportion of each array in the flywheel energy storage system and the dynamic delay parameter of the flywheel energy storage system; the output power is superimposed on the grid load change to obtain the grid frequency change; the grid power change is obtained according to the grid frequency change, and is compared with the reference power value and corrected;

[0052] In the case of only primary frequency regulation and not relying on secondary frequency regulation, the ratio between the grid load variance and the grid frequency variance within a set time period is determined based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters to measure the primary frequency regulation capability of the flywheel energy storage system.

[0053] Specific:

[0054] like Figure 4 As shown, it is a mathematical model for analyzing the primary frequency modulation dynamic characteristics of the flywheel energy storage system;

[0055] When the system frequency changes, the output power of the flywheel energy storage system is obtained according to the reference power value R, the share of each array of the flywheel energy storage system α and the dynamic delay parameter G of the flywheel energy storage system;

[0056] The output power is added to the grid load change to calculate the grid frequency change;

[0057] According to the power grid frequency change χ n (s) The power change of the power grid is calculated using droop control and compared with the reference power value R to correct the power value.

[0058] Based on this mathematical model, a dynamic expression that characterizes the primary frequency regulation capability of the flywheel energy storage system can be derived.

[0059] According to the primary frequency modulation process of the flywheel energy storage system, the frequency change expression of the flywheel energy storage system is as shown in the following formula:

[0060]

[0061] In the above formula, χ n (s) is the frequency change of the power grid, T a∑ s is the grid inertia time constant, χ NL (s) is the change in power grid load, β Σ is the grid load frequency characteristic parameter, G(s) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

[0062] The load in the power grid consists of two parts: periodic component and random component. The main task of the primary frequency regulation of the power grid is to regulate the short-period random load, so the primary frequency regulation of the flywheel energy storage system is also random and is a random process.

[0063] This embodiment uses the analysis method of random process to analyze the primary frequency regulation capability of the flywheel energy storage system in the dynamic range. The analysis methods commonly used for random process include variance and power spectrum function. Among them, variance is used to measure the degree of deviation of random variables from their mathematical expectations, describing the discrete characteristics of the distribution of random variable values, which can reflect the variation range of random variables and can be used to analyze the relationship between the variation range of the power grid cycle and the variation range of the load in the primary frequency regulation process.

[0064] Taking into account the dynamic characteristics of each part of the power grid, the primary frequency regulation ability PFRA (Primary Frequency Regulation Ability) is defined as: under the action of only primary frequency regulation (that is, not relying on secondary frequency regulation), the ratio of load change to grid frequency change within a certain period of time, the dynamic expression PFRA (dynamic) of the primary frequency regulation ability of the flywheel energy storage system can be obtained, as shown in the following formula:

[0065]

[0066] In the above formula, is the variance of the grid load within the set time period, is the variance of the grid frequency within the set time period.

[0067] According to Pascal's theorem, if a certain signal s(t) satisfies the Dirichlet condition, that is, it is continuous or has only a finite number of discontinuous points in a period, the number of maximum and minimum values ​​is finite, and it is absolutely integrable, then the Fourier transform of the certain signal s(t) exists, as shown in the following formula:

[0068]

[0069] S(w) and s(t) satisfy Parseval's theorem:

[0070]

[0071] Among them, s(t) refers to a certain signal function. The first formula is to obtain S(w) by Fourier transforming s(t). S(w) is the Fourier transform of s(t). The second formula is the relationship between S(w) and s(t) according to Parceval's theorem. The second formula is equivalent to the definition of Parceval's theorem.

[0072] Since the random variables involved in the primary frequency regulation capability analysis of the flywheel energy storage system are all zero-mean random signals, the random signal x(t) is converted into output y(t) by the transfer function H(jw), and the variance of the output y(t) is:

[0073]

[0074] In the above formula, S x (ω) is the power spectrum of the input, H(jω) is the transfer function, dω has no practical meaning, and the right side of the formula represents the integration in the interval of "positive and negative infinity". The entire formula is the variance expression obtained using Parceval's theorem.

[0075] Therefore, according to the relationship between the flywheel energy storage speed and the grid load, the variance expression of the grid frequency is obtained as shown in the following formula:

[0076]

[0077] In the above formula, χ NL (jw) is the change of grid load, T a∑ jω is the inertia time constant of the power grid, and G(jω) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

[0078] The variance expression of the power grid load is as follows:

[0079]

[0080] The variance expressions of grid frequency and grid load are introduced into the dynamic expression PFRA(dynamic) of the primary frequency regulation capability of the flywheel energy storage system, and the following is obtained:

[0081]

[0082] Since the dynamic expression of the primary frequency regulation capability of the flywheel energy storage system is consistent with the grid inertia time constant T a∑ jω, the dynamic delay of the energy storage system (reflected in G(jω)) and the grid load frequency characteristic parameter β ∑ These are related to several dynamic influencing factors. The results based on the above formula can show several dynamic influencing factors related to the primary frequency regulation capability of the flywheel energy storage system.

[0083] The current indicators cannot directly evaluate the primary frequency regulation capability of flywheel energy storage, especially after large-scale grid connection of new energy. The uncertainty of new energy output will have a serious impact on the primary frequency regulation capability, which is not conducive to the grid to formulate accurate power generation plans.

[0084] The use of primary frequency regulation dynamic expressions to quantify the primary frequency regulation capability of flywheel energy storage can not only more clearly and intuitively reflect the size of the primary frequency regulation capability, but also clearly analyze the degree of influence of various factors on the primary frequency regulation capability, thereby providing more scientific and reasonable guidance for power grid dispatchers to arrange and formulate power generation plans.

[0085] The primary frequency regulation range of the power grid is (50±0.1) Hz, i.e. (49.9~50.1) Hz. The flywheel energy storage system involved in the primary frequency regulation exhibits significant dynamic characteristics in the primary frequency regulation process due to the limitation of the load response speed. Therefore, this embodiment uses the variance in random process analysis to obtain the dynamic expression of the primary frequency regulation capability of the flywheel energy storage system, and obtains the influencing factors of the primary frequency regulation capability of the flywheel energy storage system under dynamic conditions, thereby reflecting the difference in the response of the flywheel energy storage unit to different frequency components of the power grid cycle, and the impact of the dynamic characteristics of different types of generator sets on the primary frequency regulation capability of the power grid, and measuring the rapid response capability of the power grid system to sudden accidents.

[0086] Embodiment 2:

[0087] A system for implementing the above method comprises:

[0088] The frequency modulation module is configured to: determine the output power of the flywheel energy storage system according to the reference power value, the proportion of each array in the flywheel energy storage system and the dynamic delay parameter of the flywheel energy storage system; superimpose the output power with the grid load change to obtain the grid frequency change; obtain the grid power change according to the grid frequency change, compare it with the reference power value and make correction;

[0089] The evaluation module is configured to: when there is only primary frequency regulation and no reliance on secondary frequency regulation, determine the ratio between the grid load variance and the grid frequency variance within a set time period based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters, so as to measure the primary frequency regulation capability of the flywheel energy storage system.

[0090] Embodiment three:

[0091] This embodiment provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system as described in the first embodiment above are implemented.

[0092] Embodiment 4:

[0093] This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system as described in the first embodiment are implemented.

[0094] The steps or modules involved in the above embodiments 2 to 4 correspond to those in embodiment 1. For the specific implementation, please refer to the relevant description of embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood to include any medium that can store, encode or carry an instruction set for execution by a processor and enable the processor to execute any method in the present invention.

[0095] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for evaluating the primary frequency regulation capability of a flywheel energy storage system, characterized in that: The following steps are involved: Obtain the set reference power value, the proportion of each array of the flywheel energy storage system and the dynamic delay parameter of the flywheel energy storage system, determine the output power of the flywheel energy storage system, and superimpose it with the grid load change to obtain the grid frequency change, determine the grid power change based on the obtained grid frequency change, compare it with the reference power value and make corrections; In the case of only primary frequency regulation and not relying on secondary frequency regulation, the ratio between the grid load variance and the grid frequency variance within a set time period is determined based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters. The primary frequency regulation capability of the flywheel energy storage system is measured based on the obtained ratio.

2. The method for evaluating the primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: The frequency variation of the flywheel energy storage system during primary frequency regulation is determined based on the grid load variation, grid load frequency characteristic parameters, and the dynamic delay of the flywheel energy storage system involved in the frequency regulation.

3. The method for evaluating the primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: The frequency change of the flywheel energy storage system during primary frequency modulation is shown in the following formula: In the above formula, χ n (s) is the frequency change of the power grid, T a∑ s is the grid inertia time constant, χ NL (s) is the change in power grid load, β ∑ is the grid load frequency characteristic parameter, G(s) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

4. The method for evaluating the primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: The random variables involved in the primary frequency modulation of the flywheel energy storage system are all zero-mean random signals. The random signals are output after the transfer function, and the variance of the output is: In the above formula, S x (ω) is the power spectrum of the input quantity, and H(jω) is the transfer function.

5. The method for evaluating primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: According to the relationship between the flywheel energy storage speed and the grid load, the variance of the grid frequency is obtained as shown in the following formula: In the above formula, T a∑ jω is the inertia time constant of the power grid, and G(jω) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

6. The method for evaluating the primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: The variance of the grid load is shown in the following formula: In the above formula, χ NL (jw) is the change of grid load.

7. The method for evaluating primary frequency regulation capability of a flywheel energy storage system according to claim 1, characterized in that: Determine the ratio between the grid load variance and the grid frequency variance within a set time period to measure the primary frequency regulation capability of the flywheel energy storage system, as shown in the following formula: In the above formula, σ 2 χNL is the variance of the grid load, σ 2 χn is the variance of the grid frequency T a∑ jω is the grid inertia time constant, β ∑ is the grid load frequency characteristic parameter, G(jω) is the dynamic delay of the flywheel energy storage system involved in frequency regulation.

8. A flywheel energy storage system primary frequency regulation capability evaluation system, characterized in that: include: The frequency modulation module is configured to: obtain a set reference power value, a proportion of each array of the flywheel energy storage system, and a dynamic delay parameter of the flywheel energy storage system, determine the output power of the flywheel energy storage system, and superimpose it with the grid load change to obtain the grid frequency change, determine the grid power change according to the obtained grid frequency change, compare it with the reference power value, and make corrections; The evaluation module is configured to: determine the ratio between the grid load variance and the grid frequency variance within a set time period based on the power spectrum of the input quantity, the grid inertia time constant, the dynamic delay of the energy storage system and the grid load frequency characteristic parameters when there is only primary frequency regulation and no reliance on secondary frequency regulation, and measure the primary frequency regulation capability of the flywheel energy storage system based on the obtained ratio.

9. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system as described in any one of claims 1 to 7 are implemented.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps in the method for evaluating the primary frequency regulation capability of a flywheel energy storage system according to any one of claims 1 to 7 are implemented.

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