Inertia and primary frequency modulation control method, system and device of energy storage power station and medium

Abstract

The application belongs to the technical field of energy storage regulation, and discloses a control method, system, equipment and medium for inertia and primary frequency modulation of an energy storage power station, which comprises the following steps: acquiring and monitoring parameter information of the energy storage power station; determining whether the absolute value of the frequency deviation of the power grid meets a standard deviation value, if not, continuously acquiring and monitoring the parameter information of the energy storage power station, and if yes, calculating the inertia response and the total regulation amount of the primary frequency modulation action of the energy storage power station according to the parameter information of the energy storage power station and a sliding window time, and combining adaptive control and a lag filter mechanism; distributing the optimized inertia response and the total regulation amount of the primary frequency modulation action of the energy storage power station to each energy storage unit through an energy storage power station control system for response action, and continuously acquiring and monitoring the key parameter information of the energy storage power station. The application significantly improves the frequency response stability and regulation accuracy of the energy storage power station, and enhances the robustness and reliability of the power system under frequency mutation.

Description

Technical Field

[0001] This invention relates to the field of energy storage regulation technology, and in particular to control methods, systems, equipment and media for the inertia and primary frequency regulation of energy storage power stations. Background Technology

[0002] Currently, the installed capacity of new energy storage is growing rapidly, and my country's renewable energy is developing rapidly. The high proportion of new energy grid connection has led to increasingly tight grid flexibility adjustment resources and a continuous decline in the system's dynamic adjustment capability. In the face of the difficulties and challenges of the new power system, energy storage power stations, as emerging grid-connected entities, need to be able to meet the system's dynamic adjustment capability requirements, such as grid frequency regulation, peak shaving, and emergency power support.

[0003] Unlike traditional thermal power units that provide mechanical inertia support through rotors and primary frequency regulation capability through boiler heat storage, energy storage power stations achieve both inertia and primary frequency regulation capability through power electronic devices, resulting in rapid, accurate, and almost synchronous response times.

[0004] However, the inertial response of traditional thermal power units begins within a few hundred milliseconds of a frequency fluctuation in the power grid. It mitigates frequency changes through rapid energy exchange, followed by gradual takeover by primary frequency regulation, using continuous power adjustment to gradually restore the frequency to normal. Current control strategies for energy storage power stations generate inertial regulation based on the rate of frequency change and primary frequency regulation based on the frequency deviation. Due to the high response speed of energy storage systems, inertial response and primary frequency regulation start simultaneously within a very short time. The two regulation values ​​are generated concurrently and superimposed. Under conditions of rapid system frequency fluctuations, overshooting of the regulation value can lead to further frequency degradation.

[0005] Therefore, how to provide control methods, systems, equipment, and media for the inertia and primary frequency regulation of energy storage power stations is an urgent problem to be solved. Summary of the Invention

[0006] The embodiments of the present invention provide a method, system, equipment and medium for controlling the inertia and primary frequency regulation of an energy storage power station, in order to solve the problems in the prior art.

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0008] According to a first aspect of the present invention, a method for controlling the inertia and primary frequency regulation of an energy storage power station is provided.

[0009] In one embodiment, the control method for the inertia and primary frequency regulation of an energy storage power station includes the following steps:

[0010] Based on a pre-configured sliding window time, the parameter information of the energy storage power station is acquired and monitored. The parameter information of the energy storage power station includes the grid frequency deviation, the active load command of the energy storage power station, the adjustment amount of the primary frequency regulation action of the energy storage power station, the actual active power of the energy storage power station, and the rate of change of the grid frequency deviation.

[0011] Determine whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, continue to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, calculate the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism.

[0012] The energy storage power station control system distributes the optimized inertial response and total adjustment of primary frequency regulation to each energy storage unit for response actions, and continuously acquires and monitors key parameter information of the energy storage power station.

[0013] In one embodiment, the step of calculating the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, combined with adaptive control and hysteresis filtering mechanisms, includes the following steps:

[0014] The initial inertial response adjustment of the energy storage power station is calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station.

[0015] Based on the hysteresis filter, the inertia adjustment power is smoothed, and the filtered inertia response adjustment is calculated based on the preliminary inertia response adjustment.

[0016] Based on the rate of change of power grid frequency deviation, the adaptive inertia response adjustment is calculated using the adaptive coefficient of inertia adjustment.

[0017] Based on the obtained values ​​of the power grid frequency deviation and the rate of change of the power grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, the inertial response and the total adjustment of the primary frequency regulation action are dynamically calculated.

[0018] Based on the different operating states of the energy storage power station, the dynamic upper limit of the inertial response and the total adjustment of the primary frequency regulation action is optimized by constraining the conditions, so as to obtain the final inertial response and the total adjustment of the primary frequency regulation action.

[0019] In one embodiment, the calculation formula for calculating the initial inertial response adjustment of the energy storage power station using grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station is as follows:

[0020]

[0021] In the formula, ΔPI T represents the initial inertial response adjustment of the energy storage power station. I f represents the equivalent inertia time constant of an energy storage power station. N P represents the rated frequency of the power grid, Δt represents the sliding window time, and P represents the sliding window time. N Δf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

[0022] In one embodiment, the formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows:

[0023]

[0024] In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the previous filtering.

[0025] In one embodiment, the formula for calculating the adaptive inertia response adjustment based on the grid frequency deviation change rate and the adaptive coefficient of inertia adjustment is as follows:

[0026]

[0027] In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

[0028] In one embodiment, the formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action based on the obtained grid frequency deviation and the rate of change of grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows:

[0029]

[0030] In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the adjustment amount of the inertial response after filtering. This represents the rate of change of the power grid frequency deviation.

[0031] In one embodiment, the constraint includes:

[0032] If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action.

[0033] If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation.

[0034] If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

[0035] According to a second aspect of the present invention, a control system for the inertia and primary frequency regulation of an energy storage power station is provided.

[0036] In one embodiment, the control system for the inertia and primary frequency regulation of the energy storage power station includes:

[0037] The parameter acquisition unit is used to acquire and monitor the parameter information of the energy storage power station based on a pre-configured sliding window time. The parameter information of the energy storage power station includes the grid frequency deviation, the active load command of the energy storage power station, the adjustment amount of the primary frequency regulation action of the energy storage power station, the actual active power of the energy storage power station, and the rate of change of the grid frequency deviation.

[0038] The judgment unit is used to determine whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, it continues to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, it calculates the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism.

[0039] The control unit is used to distribute the optimized inertial response and total adjustment of the primary frequency regulation action of the energy storage power station to each energy storage unit for response actions through the energy storage power station control system, and to continuously acquire and monitor key parameter information of the energy storage power station.

[0040] In one embodiment, the calculation of the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, combined with adaptive control and hysteresis filtering mechanisms, includes:

[0041] The initial inertial response adjustment of the energy storage power station is calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station.

[0042] Based on the hysteresis filter, the inertia adjustment power is smoothed, and the filtered inertia response adjustment is calculated based on the preliminary inertia response adjustment.

[0043] Based on the rate of change of power grid frequency deviation, the adaptive inertia response adjustment is calculated using the adaptive coefficient of inertia adjustment.

[0044] Based on the obtained values ​​of the power grid frequency deviation and the rate of change of the power grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, the inertial response and the total adjustment of the primary frequency regulation action are dynamically calculated.

[0045] Based on the different operating states of the energy storage power station, the dynamic upper limit of the inertial response and the total adjustment of the primary frequency regulation action is optimized by constraining the conditions, so as to obtain the final inertial response and the total adjustment of the primary frequency regulation action.

[0046] In one embodiment, the calculation formula for calculating the initial inertial response adjustment of the energy storage power station using grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station is as follows:

[0047]

[0048] In the formula, ΔP I T represents the initial inertial response adjustment of the energy storage power station. I f represents the equivalent inertia time constant of an energy storage power station. N P represents the rated frequency of the power grid, Δt represents the sliding window time, and P represents the sliding window time. N Δf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

[0049] In one embodiment, the formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows:

[0050]

[0051] In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the previous filtering.

[0052] In one embodiment, the formula for calculating the adaptive inertia response adjustment based on the grid frequency deviation change rate and the adaptive coefficient of inertia adjustment is as follows:

[0053]

[0054] In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

[0055] In one embodiment, the formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action based on the obtained grid frequency deviation and the rate of change of grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows:

[0056]

[0057] In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the adjustment amount of the inertial response after filtering. This represents the rate of change of the power grid frequency deviation.

[0058] In one embodiment, the constraint includes:

[0059] If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action.

[0060] If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation.

[0061] If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

[0062] According to a third aspect of the present invention, a computer device is provided.

[0063] In some embodiments, the computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method described above.

[0064] According to a fourth aspect of the present invention, a computer-readable storage medium is provided.

[0065] In one embodiment, a computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the above method.

[0066] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0067] This invention provides an adaptive optimization control method for the inertia and primary frequency regulation capability of an energy storage power station. It selects key parameters of the energy storage power station, such as the grid frequency difference, the rate of change of the frequency difference, and the primary frequency regulation adjustment amount. By introducing adaptive control and hysteresis filtering mechanisms, it optimizes the inertia regulation of the energy storage power station during the initial stage of frequency change and the frequency stabilization stage. While improving the response speed, it effectively suppresses power overshoot and oscillation caused by frequency fluctuations. Furthermore, for the regulation state, it dynamically adjusts the upper limit coefficient of the total regulation amount to ensure that the energy storage power station can respond quickly in power system emergencies and smoothly return to normal state when the frequency recovers. Compared with existing technologies, this invention significantly improves the frequency response stability and regulation accuracy of the energy storage power station, and enhances the robustness and reliability of the power system under frequency abrupt changes.

[0068] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0069] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0070] Figure 1 This is a flowchart illustrating a control method for the inertia and primary frequency regulation of an energy storage power station according to an exemplary embodiment;

[0071] Figure 2 This is a schematic block diagram illustrating the control system for the inertia and primary frequency regulation of an energy storage power station according to an exemplary embodiment.

[0072] Figure 3 This is a schematic diagram of the structure of a computer device according to an exemplary embodiment;

[0073] Figure 4 This is a flowchart illustrating the principle of a control method for the inertia and primary frequency regulation of an energy storage power station according to an exemplary embodiment.

[0074] Figure 5 This is a control process diagram illustrating a control method for the inertia and primary frequency regulation of an energy storage power station according to an exemplary embodiment. Detailed Implementation

[0075] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0076] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0077] In this document, unless otherwise stated, the term "multiple" means two or more.

[0078] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0079] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0080] It should be understood that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order constraint on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the diagram may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0081] The modules in the apparatus or system of this application can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0082] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0083] Figure 1 and Figures 4-5 An embodiment of the control method for the inertia and primary frequency regulation of the energy storage power station of the present invention is shown.

[0084] In this optional embodiment, the control method for the inertia and primary frequency regulation of the energy storage power station includes the following steps:

[0085] Step S101: Based on a pre-configured sliding window time, acquire and monitor key parameter information of the energy storage power station. The key parameter information of the energy storage power station includes grid frequency deviation Δf and active power load command P of the energy storage power station. s ΔP, the primary frequency regulation adjustment amount of the energy storage power station f The actual active power P of the energy storage power station r and the rate of change of grid frequency deviation

[0086] Specifically, according to the requirements of the national standard GB / T 36547-2024 "Technical Regulations for Electrochemical Energy Storage Power Stations Connected to the Power Grid", the time window for calculating frequency changes should be 100ms-200ms, the sliding window time Δt is set to 200ms, and the dead zone of the inertial response of the energy storage power station is set to be no greater than ±0.05Hz. The standard setting is: the inertial response will activate when the absolute value of the frequency deviation |Δf| is greater than 0.05Hz.

[0087] According to the requirements of the national standard GB / T 40595-2021 "Technical Specifications and Test Guidelines for Primary Frequency Regulation of Grid-Connected Power Supply", the primary frequency regulation dead zone of energy storage power station should not be greater than ±0.05Hz. The standard setting is: when the absolute value of frequency deviation |Δf| is greater than 0.05Hz, the primary frequency regulation will be activated.

[0088] Step S103: Determine whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, continue to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, calculate the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism.

[0089] Step S105: The optimized inertial response and total adjustment of the primary frequency regulation action of the energy storage power station are distributed to each energy storage unit for response actions through the energy storage power station control system, and the key parameter information of the energy storage power station is continuously acquired and monitored.

[0090] In this optional embodiment, when calculating the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, and in combination with adaptive control and hysteresis filtering mechanisms, the initial inertial response adjustment of the energy storage power station can be calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station; the inertial adjustment power is smoothed based on the hysteresis filter, and the filtered inertial response adjustment is calculated based on the initial inertial response adjustment; the adaptive inertial response adjustment is calculated based on the grid frequency deviation change rate through the adaptive inertial adjustment coefficient; the inertial response and total adjustment of the primary frequency regulation action are dynamically calculated based on the obtained grid frequency deviation and grid frequency deviation change rate, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment; and the dynamic upper limit of the inertial response and total adjustment of the primary frequency regulation action is constrained and optimized based on the different operating states of the energy storage power station, to obtain the final inertial response and total adjustment of the primary frequency regulation action.

[0091] In this optional embodiment, the calculation formula for calculating the initial inertial response adjustment of the energy storage power station using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station is as follows:

[0092]

[0093] In the formula, ΔP I T represents the initial inertial response adjustment of the energy storage power station. I The time constant of the equivalent inertia of the energy storage power station is represented by f, which is set to 10s. N This represents the rated frequency of the power grid, set to 50Hz, where Δt represents the sliding window time, and P... NΔf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

[0094] It should be noted that in the actual operation of energy storage power stations, in the early stages of frequency changes, the small time window may cause the system to frequently calculate deviations and generate adjustment amounts, which in turn cause frequency fluctuations. In order to improve this situation, a hysteresis filter is introduced to smooth the response of inertia adjustment and reduce the impact of frequent switching.

[0095] In this optional embodiment, the formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows:

[0096]

[0097] In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the last filtering. If no historical data is available, The value is taken from the currently calculated ΔP. I This is equivalent to skipping the first filtering step, making it closer to the actual operating state; otherwise... The value is taken as the inertia adjustment power after the previous filtering.

[0098] It should be noted that, considering the current control logic of the energy storage power station, the inertia and primary frequency regulation respond simultaneously and continuously, and their effects are superimposed. When the grid frequency deviation decreases and the system tends to stabilize, the inertia response still generates regulation due to the frequency deviation change rate. Over-response of inertia regulation prevents the system from stabilizing quickly. Therefore, the range of inertia response is constrained. In the initial stage of regulation, when the grid frequency deviation exceeds 0.1Hz or the frequency deviation change rate exceeds 0.02Hz / s, both primary frequency regulation and inertia regulation are set to be fully applied (full application means that both primary frequency regulation and inertia regulation are theoretical calculations and are not constrained, i.e., the theoretical regulation (maximum value) is applied); otherwise, the inertia response regulation is multiplied by an adaptive coefficient.

[0099] In this optional embodiment, the calculation formula for calculating the adaptive inertia response adjustment amount based on the grid frequency deviation change rate and the adaptive inertia adjustment coefficient is as follows:

[0100]

[0101] In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor used to control the sensitivity of the adaptive coefficient, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

[0102] In this optional embodiment, the formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action based on the obtained grid frequency deviation and the rate of change of grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows:

[0103]

[0104] In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the amount of inertia response adjustment after filtering.

[0105] It should be noted that, in order to avoid excessive regulation due to the superposition of primary frequency regulation and inertia in the initial stage of regulation, as well as insufficient regulation effect due to excessive grid frequency difference, different upper limit coefficients of regulation are introduced to constrain the total regulation.

[0106] In this optional embodiment, the constraints include:

[0107] If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action.

[0108] If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation.

[0109] If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

[0110] Specifically, the formula for determining the constraint condition is:

[0111]

[0112] ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This represents the adjustment amount of the primary frequency regulation action of the energy storage power station, where Δt represents the sliding window time. This represents the rate of change of the power grid frequency deviation.

[0113] Specifically, the primary frequency regulation and inertia adjustment of the energy storage power station are optimized through adaptive control and hysteresis filtering mechanisms. A low-pass filtering algorithm is set to smooth the response of inertia adjustment and reduce the impact of frequent switching. Furthermore, an adaptive adjustment coefficient is introduced based on the frequency deviation change rate to reasonably control the inertia adjustment amount, ensuring that the inertia adjustment can adapt quickly and effectively under different frequency change rates. Further, the solution results need to meet the dynamic upper limit coefficient constraints for different operating states. A lower upper limit is set under normal conditions to ensure stability, while the upper limit is appropriately increased under emergency conditions to ensure rapid response and achieve a smooth transition. Finally, the adaptive optimization results considering filter hysteresis under the constraints are obtained.

[0114] Figure 2 An embodiment of the control system for the inertia and primary frequency regulation of the energy storage power station of the present invention is shown.

[0115] In this optional embodiment, the control system for the inertia and primary frequency regulation of the energy storage power station includes:

[0116] The parameter acquisition unit 201 is used to acquire and monitor the parameter information of the energy storage power station based on a pre-configured sliding window time. The parameter information of the energy storage power station includes the grid frequency deviation, the active load command of the energy storage power station, the adjustment amount of the primary frequency regulation action of the energy storage power station, the actual active power of the energy storage power station, and the rate of change of the grid frequency deviation.

[0117] The judgment unit 203 is used to judge whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, it continues to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, it calculates the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism.

[0118] The control unit 205 is used to distribute the optimized inertial response and total adjustment amount of the primary frequency regulation action of the energy storage power station to each energy storage unit for response actions through the energy storage power station control system, and to continuously acquire and monitor key parameter information of the energy storage power station.

[0119] In this optional embodiment, the step of calculating the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, combined with adaptive control and hysteresis filtering mechanisms, includes:

[0120] The initial inertial response adjustment of the energy storage power station is calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station.

[0121] Based on the hysteresis filter, the inertia adjustment power is smoothed, and the filtered inertia response adjustment is calculated based on the preliminary inertia response adjustment.

[0122] Based on the rate of change of power grid frequency deviation, the adaptive inertia response adjustment is calculated using the adaptive coefficient of inertia adjustment.

[0123] Based on the obtained values ​​of the power grid frequency deviation and the rate of change of the power grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, the inertial response and the total adjustment of the primary frequency regulation action are dynamically calculated.

[0124] Based on the different operating states of the energy storage power station, the dynamic upper limit of the inertial response and the total adjustment of the primary frequency regulation action is optimized by constraining the conditions, so as to obtain the final inertial response and the total adjustment of the primary frequency regulation action.

[0125] In this optional embodiment, the calculation formula for calculating the initial inertial response adjustment of the energy storage power station using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power of the energy storage power station is as follows:

[0126]

[0127] In the formula, ΔP I T represents the initial inertial response adjustment of the energy storage power station. I f represents the equivalent inertia time constant of an energy storage power station. N P represents the rated frequency of the power grid, Δt represents the sliding window time, and P represents the sliding window time. N Δf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

[0128] In this optional embodiment, the formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows:

[0129]

[0130] In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the previous filtering.

[0131] In this optional embodiment, the calculation formula for calculating the adaptive inertia response adjustment amount based on the grid frequency deviation change rate and the adaptive inertia adjustment coefficient is as follows:

[0132]

[0133] In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

[0134] In this optional embodiment, the formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action based on the obtained grid frequency deviation and the rate of change of grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows:

[0135]

[0136] In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the amount of inertia response adjustment after filtering.

[0137] In this optional embodiment, the constraints include:

[0138] If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action.

[0139] If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation.

[0140] If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

[0141] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 3 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores static and dynamic information data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0142] Those skilled in the art will understand that Figure 3 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0143] In addition, the present invention also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0144] In addition, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the above method embodiments.

[0145] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0146] This invention is not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A control method for the inertia and primary frequency regulation of an energy storage power station, characterized in that, The control method for the inertia and primary frequency regulation of this energy storage power station includes the following steps: Based on a pre-configured sliding window time, the parameter information of the energy storage power station is acquired and monitored. The parameter information of the energy storage power station includes the grid frequency deviation, the active load command of the energy storage power station, the adjustment amount of the primary frequency regulation action of the energy storage power station, the actual active power of the energy storage power station, and the rate of change of the grid frequency deviation. Determine whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, continue to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, calculate the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism. The optimized inertial response and total adjustment of primary frequency regulation are distributed to each energy storage unit through the energy storage power station control system to perform response actions, and key parameter information of the energy storage power station is continuously acquired and monitored. The calculation of the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, combined with adaptive control and hysteresis filtering mechanisms, includes the following steps: The initial inertial response adjustment of the energy storage power station is calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power. Based on a hysteresis filter, the inertial adjustment power is smoothed, and the filtered inertial response adjustment is calculated based on the initial adjustment. The adaptive inertial response adjustment is calculated using an adaptive coefficient based on the grid frequency deviation change rate. The inertial response and the total adjustment of the primary frequency regulation action are dynamically calculated based on the obtained grid frequency deviation and its change rate, combined with the filtered and adaptive inertial response adjustments. Finally, based on different operating states of the energy storage power station, the dynamic upper limit of the inertial response and the total adjustment of the primary frequency regulation action is optimized using constraint conditions to obtain the final inertial response and the total adjustment of the primary frequency regulation action.

2. The control method for inertia and primary frequency regulation of an energy storage power station according to claim 1, characterized in that, The calculation formula for the initial inertial response adjustment of the energy storage power station, which utilizes grid frequency deviation, sliding window time, grid rated frequency, and rated active power, is as follows: In the formula, ΔP I T represents the initial inertial response adjustment of the energy storage power station. I f represents the equivalent inertia time constant of an energy storage power station. N P represents the rated frequency of the power grid, Δt represents the sliding window time, and P represents the sliding window time. N Δf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

3. The control method for inertia and primary frequency regulation of an energy storage power station according to claim 1, characterized in that, The formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows: In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the previous filtering.

4. The control method for inertia and primary frequency regulation of an energy storage power station according to claim 1, characterized in that, The formula for calculating the adaptive inertia response adjustment based on the power grid frequency deviation change rate and the adaptive inertia adjustment coefficient is as follows: In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

5. The control method for inertia and primary frequency regulation of an energy storage power station according to claim 1, characterized in that, The formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action, based on the obtained values ​​of the power grid frequency deviation and the rate of change of the power grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows: In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the adjustment amount of the inertia response after filtering; Δt represents the rate of change of the power grid frequency deviation; Δt represents the sliding window time; Δf represents the power grid frequency deviation.

6. The control method for inertia and primary frequency regulation of an energy storage power station according to claim 1, characterized in that, The constraints include: If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action. If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation. If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

7. A control system for the inertia and primary frequency regulation of an energy storage power station, characterized in that, The control system for the inertia and primary frequency regulation of this energy storage power station includes: The parameter acquisition unit is used to acquire and monitor the parameter information of the energy storage power station based on a pre-configured sliding window time. The parameter information of the energy storage power station includes the grid frequency deviation, the active load command of the energy storage power station, the adjustment amount of the primary frequency regulation action of the energy storage power station, the actual active power of the energy storage power station, and the rate of change of the grid frequency deviation. The judgment unit is used to determine whether the absolute value of the grid frequency deviation meets the standard deviation value. If it does not meet the standard deviation value, it continues to acquire and monitor the parameter information of the energy storage power station. If it meets the standard deviation value, it calculates the inertial response of the energy storage power station and the total adjustment amount of the primary frequency regulation action based on the parameter information of the energy storage power station and the sliding window time, combined with the adaptive control and hysteresis filtering mechanism. The control unit is used to distribute the optimized inertial response and total adjustment of the primary frequency regulation action of the energy storage power station to each energy storage unit for response actions through the energy storage power station control system, and to continuously acquire and monitor key parameter information of the energy storage power station. The calculation of the inertial response and total adjustment of the primary frequency regulation action of the energy storage power station based on the parameter information and sliding window time of the energy storage power station, combined with adaptive control and hysteresis filtering mechanisms, includes: The initial inertial response adjustment of the energy storage power station is calculated using the grid frequency deviation, sliding window time, grid rated frequency, and rated active power. Based on a hysteresis filter, the inertial adjustment power is smoothed, and the filtered inertial response adjustment is calculated based on the initial adjustment. The adaptive inertial response adjustment is calculated using an adaptive coefficient based on the grid frequency deviation change rate. The inertial response and the total adjustment of the primary frequency regulation action are dynamically calculated based on the obtained grid frequency deviation and its change rate, combined with the filtered and adaptive inertial response adjustments. Finally, based on different operating states of the energy storage power station, the dynamic upper limit of the inertial response and the total adjustment of the primary frequency regulation action is optimized using constraint conditions to obtain the final inertial response and the total adjustment of the primary frequency regulation action.

8. The control system for the inertia and primary frequency regulation of the energy storage power station according to claim 7, characterized in that, The calculation formula for the initial inertial response adjustment of the energy storage power station, which utilizes grid frequency deviation, sliding window time, grid rated frequency, and rated active power, is as follows: In the formula, ΔP I T represents the initial inertial response adjustment of the energy storage power station. I f represents the equivalent inertia time constant of an energy storage power station. N P represents the rated frequency of the power grid, Δt represents the sliding window time, and P represents the sliding window time. N Δf represents the rated active power of the energy storage power station, and Δf represents the grid frequency deviation.

9. The control system for the inertia and primary frequency regulation of the energy storage power station according to claim 7, characterized in that, The formula for smoothing the inertia adjustment power based on the hysteresis filter and calculating the filtered inertia response adjustment based on the initial inertia response adjustment is as follows: In the formula, ΔP represents the adjustment amount of the inertial response after filtering, Δt represents the sliding window time, τ represents the time constant reflecting the filter response speed, and ΔP represents the time constant reflecting the filter response speed. I This indicates the initial inertial response adjustment of the energy storage power station. This represents the inertia adjustment power after the previous filtering.

10. The control system for the inertia and primary frequency regulation of the energy storage power station according to claim 7, characterized in that, The formula for calculating the adaptive inertia response adjustment based on the power grid frequency deviation change rate and the adaptive inertia adjustment coefficient is as follows: In the formula, K represents the adaptive inertia response adjustment amount. α This represents the adaptive coefficient for inertia adjustment. Δf represents the inertial response adjustment after filtering, α represents the attenuation factor, Δf represents the grid frequency deviation, and Δt represents the sliding window time.

11. The control system for the inertia and primary frequency regulation of the energy storage power station according to claim 7, characterized in that, The formula for dynamically calculating the inertial response and the total adjustment of the primary frequency regulation action, based on the obtained values ​​of the power grid frequency deviation and the rate of change of the power grid frequency deviation, combined with the filtered inertial response adjustment and the adaptive inertial response adjustment, is as follows: In the formula, ΔP represents the total adjustment amount of the inertial response and the primary frequency modulation action. f This indicates the adjustment amount of the primary frequency regulation action of the energy storage power station. This represents the adaptive inertia response adjustment amount. This represents the adjustment amount of the inertia response after filtering. Δt represents the rate of change of the power grid frequency deviation; Δt represents the sliding window time; Δf represents the power grid frequency deviation.

12. The control system for the inertia and primary frequency regulation of the energy storage power station according to claim 7, characterized in that, The constraints include: If the grid frequency deviation is less than 0.1Hz and the rate of change of the grid frequency deviation is less than 0.02Hz / s, the energy storage power station is judged to be in normal condition, and the inertial response and the total adjustment of primary frequency regulation are limited to 1.1 times the adjustment of primary frequency regulation action. If the grid frequency deviation is greater than 0.2Hz, or the rate of change of the grid frequency deviation is greater than 0.1Hz / s, the energy storage power station is determined to be in an emergency state, and the inertial response and the total primary frequency regulation are limited to 1.5 times the primary frequency regulation. If the grid frequency is under other conditions, the inertial response and the total primary frequency regulation will be limited to 1.3 times the primary frequency regulation.

13. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

Images