Storage medium, and charging and discharging control method, device and equipment of energy storage device

Abstract

The invention discloses a storage medium, and a charging and discharging control method, device and equipment of an energy storage device. The energy storage device is provided with an energy storage converter PCS. The charging and discharging control device comprises a real-time monitoring unit and a control unit corresponding to the energy storage device; the real-time monitoring unit is used for monitoring the real-time system frequency of the novel power system; the control strategy of the control unit comprises the steps that when the real-time system frequency exceeds the upper limit and the lower limit of a preset interval, the real-time system frequency serves as a parameter, and the real-time adaptive charging and discharging power of the energy storage device is calculated according to a preset algorithm; and according to the charging and discharging power adapted in real time, the charging and discharging power of the energy storage device is adjusted through the PCS. According to the invention, the stable active, effective and real-time support of the energy storage device on the frequency of the novel power system can be realized, an energy management platform or scheduling regulation is not needed, the dependence on a large-scale communication system is reduced, and the method is particularly suitable for large-scale distributed energy storage devices.

Description

Technical Field

[0001] The present invention relates to the field of novel power systems, and in particular to a method, device and equipment for controlling the charging and discharging of storage media and energy storage devices. Background Art

[0002] Frequency stability refers to the ability of a system to maintain its frequency within a certain range after being subjected to a disturbance that causes an imbalance in power between the source and the load.

[0003] In traditional power systems, synchronous generators generally have automatic droop characteristics, and the load power of motor-driven machinery such as compressors, fans, and pumps is positively correlated with the speed / frequency. Therefore, system frequency regulation for short-term or small disturbances can be achieved through automatic feedback, while longer-term power differences are achieved through AGC secondary frequency regulation or scheduling.

[0004] In AC power systems dominated by new energy (i.e., new power systems), with the large-scale access of renewable energy generation, non-rotating power loads such as electric heating and electric heat storage, and the construction of high-voltage direct current interconnection systems, the constant power control mode of power electronic converters has led to a serious reduction in the correlation between the power of power supplies, loads and other equipment and the system frequency, which is manifested as a weakening of the frequency regulation capability. Therefore, the frequency stability problem of AC island systems for hydrogen production by electrolysis of new energy has become increasingly serious. In the prior art, when a new power system is disturbed, the energy management and control platform or dispatcher generally performs data prediction based on the information it obtains, such as the active output of each power source in the entire network, the power load of the entire network, and the charge and discharge capacity of the energy storage device, and generates corresponding control instructions for power switching or load increase and decrease based on the prediction results. If it exceeds a certain range, it generates control instructions for the energy storage element; then, the power system frequency stability is controlled by controlling the charge and discharge of the energy storage element through the communication system.

[0005] After research, the inventors found that the existing technical solutions for frequency stability control of new power systems still have at least the following defects:

[0006] In new power systems, distributed energy is relatively dispersed in space and numerous in number. Therefore, in most cases, there is a large error between the predicted value and the actual value, which leads to poor control of the system frequency.

[0007] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0008] The purpose of the present invention is to be able to timely and effectively control the system frequency and improve the control effect.

[0009] The present invention provides a charge and discharge control method for an energy storage device, which is used to stabilize the system frequency of a new power system, comprising the steps of:

[0010] S11. Obtaining preset information data; the information data includes the real-time charge rate of the energy storage device, the real-time system frequency of the novel power system, and the total power of all energy storage devices participating in frequency regulation in the novel power system;

[0011] S12. When the real-time system frequency exceeds the upper and lower limits of a preset interval, calculating the real-time adaptive charge and discharge power of the energy storage device according to a preset algorithm using the information data as a parameter;

[0012] S13. According to the real-time adapted charging and discharging power, the charging and discharging power of the energy storage device is adjusted through the PCS.

[0013] In another aspect of the present invention, a charge and discharge control device for an energy storage device is provided for stabilizing the system frequency of a new power system. The energy storage device is provided with an energy storage converter PCS; the charge and discharge control device includes a real-time monitoring unit and a control unit;

[0014] The real-time monitoring unit is used to monitor the real-time system frequency of the novel power system and the real-time charge rate of the energy storage device;

[0015] The control strategy included in the control unit includes:

[0016] When the real-time system frequency exceeds the upper and lower limits of the preset interval, the real-time adaptive charge and discharge power of the energy storage device is calculated according to a preset algorithm using the real-time system frequency, the real-time charge rate and as parameters;

[0017] The charging and discharging power of the energy storage device is adjusted by the PCS according to the real-time adapted charging and discharging power.

[0018] On the other hand, an embodiment of the present invention further provides a charge and discharge control device for an energy storage device, wherein the charge and discharge control device for the energy storage device includes a computer program stored on a medium, wherein the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the methods described in the above aspects and achieves the same technical effects.

[0019] In another aspect of the embodiment of the present invention, a storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, each step of the charge and discharge control method of the energy storage device as described in any one of the above items is implemented.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, the frequency of the new power system and the charge rate of the energy storage device, as well as the basic parameters of the energy storage device within the new power system (the total power of all energy storage devices participating in frequency regulation in the new power system) are monitored in real time. The frequency of the new power system is controlled according to a preset algorithm, and the energy storage device can be used to actively stabilize the frequency of the new power system without the need for an energy management platform or scheduling and control. Since the energy storage device in the present invention can determine the real-time adaptive charging and discharging power of the energy storage device based on its own real-time charge rate and the real-time system frequency of the new power system, the present invention's active and effective real-time support for the frequency stabilization of the new power system does not require the participation of an energy management platform or scheduling and control, thereby reducing dependence on large-scale communication systems and is particularly suitable for large-scale, distributed energy storage device applications.

[0022] Specifically, in the application scenario of the present invention, the energy storage devices in the new power system are widely distributed and dispersed, and the reliability of the communication channel and the control system is a key factor affecting the regulation effect; the local self-regulation method in the present invention that is free from the participation of the energy management platform or dispatching and control can not only reduce the energy management platform or dispatching's erroneous prediction of the power generation and consumption balance, but also avoid the loss of control of the frequency stability control of the new power system caused by the paralysis of the communication system.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other purposes, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the charge and discharge control device of the energy storage device of the present invention;

[0026] Figure 2 It is a schematic diagram of the steps of the charge and discharge control method of the energy storage device of the present invention;

[0027] Figure 3 It is a structural diagram of the charge and discharge control device of the energy storage device described in the present invention. DETAILED DESCRIPTION

[0028] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0029] Unless expressly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising” will be understood to include the stated elements or components but not to exclude other elements or components.

[0030] In this document, the terms "first", "second", etc. are used to distinguish two different elements or parts, and are not used to limit specific positions or relative relationships. In other words, in some embodiments, the terms "first", "second", etc. can also be interchangeable with each other.

[0031] Example 1

[0032] In order to be able to control the system frequency in a timely and effective manner and improve the control effect, refer to Figure 1 In an embodiment of the present invention, a charge and discharge control device for an energy storage device is provided for stabilizing the system frequency of a new power system, wherein the energy storage device is provided with an energy storage converter PCS; the charge and discharge control device includes a real-time monitoring unit and a control unit;

[0033] The real-time monitoring unit is used to monitor the real-time system frequency of the new power system; the control strategy included in the control unit includes: when the real-time system frequency exceeds the upper and lower limits of the preset interval, the real-time adaptive charging and discharging power of the energy storage device is calculated according to a preset algorithm using the real-time system frequency as a parameter; according to the real-time adaptive charging and discharging power, the charging and discharging power of the energy storage device is adjusted through the PCS.

[0034] Taking the system rated frequency as a reference, the real-time system frequency can be used to determine whether the current system frequency disturbance exceeds the preset range. For example, the rated system frequency can be set to 50Hz and ±0.2H Z For the preset interval, at this time, when the real-time system frequency exceeds 50.2 Hz or is lower than 49.8 Hz, the real-time system frequency is used as a parameter to calculate the real-time adaptive charging and discharging power of the energy storage device according to the preset algorithm.

[0035] In an embodiment of the present invention, the real-time adaptive charging and discharging power of the energy storage device may be calculated using the following preset algorithm, specifically:

[0036] In the embodiment of the present invention, the novel power system is constructed by distributing multiple energy storage devices interconnected by circuits within a larger area, wherein the capacity of each energy storage device varies and the storage time varies.

[0037] Total inertia E of the new power system Cs , total power of energy storage device ΣP ES (nominal value) and total energy storage ΣE ES (0.5 nominal value); First, calculate the active power shortage ΔP of the new power system. The calculation formula includes:

[0038]

[0039] Among them, ΔP is the active power shortage of the entire new power system; ECs is the equivalent inertia value of the new power system; fs is the real-time system frequency at the time when the disturbance occurs at the node to which the energy storage device belongs; f N is the rated frequency;

[0040] Calculate the real-time adaptive charging and discharging power P of the energy storage device i , the calculation formula includes:

[0041]

[0042] Wherein, k is greater than 1 and not greater than 3; ΔP is the active power shortage of the new power system; P imax is the maximum charge and discharge power of the energy storage device i; P ES is the total power of the energy storage device i. Preferably, the value of k can be 1.3-2.

[0043] In the embodiment of the present invention, the value of k is greater than 1 and not greater than 3. This is mainly due to the fact that some energy storage devices in the entire new power system may be unable to participate in frequency stabilization due to insufficient charge rate or faults. Therefore, by setting a coefficient with a value greater than 1, the regulation amount of a single storage device is appropriately increased, thereby compensating for the lack of energy storage devices that cannot participate in frequency regulation in the new power system. The inventors have found through research that the optimal value range of k is 1.3 to 2.

[0044] In practical applications, the embodiment of the present invention calculates the real-time adaptive charging and discharging power P of the energy storage device. i , you can also include preconditions:

[0045] |P i |<P imax ;P imax is the maximum charge and discharge power.

[0046] Furthermore, during the operation of the energy storage device, the amount of energy that can be charged or discharged varies depending on its energy storage state. To avoid the situation where the final calculation result exceeds the current charge and discharge capacity of the energy storage device and the charging and discharging cannot be performed according to the calculation result, the following judgment conditions may be further included in the embodiment of the present invention:

[0047] When the current charging energy of the energy storage device ≮E cmax , or, current discharge energy ≮E dmax When the PCS is stopped, the charging and discharging power of the energy storage device is adjusted; wherein, E cmax is the maximum charging capacity calculated based on the real-time charge rate SOC; E dmax It is the maximum discharge capacity calculated based on the real-time charge rate SOC.

[0048] In this way, when the calculation result exceeds the current charging and discharging capacity of the energy storage device, the maximum power output of the energy storage device is used.

[0049] A specific example according to an embodiment of the present invention may be as follows:

[0050] First, the target new power system includes a 1MW / 1MWh energy storage device i with a charge rate of 60%. In addition, the rated frequency of the target new power system is 50Hz, the power is 100MW when the source and load are balanced, and the total inertia time is 10s. The total inertia of the power system E can be calculated as Cs is 1GJ.

[0051] Assume that the total energy storage capacity in the target new power system is 10MW / 20MWh;

[0052] Assume that the frequency change rate monitored by energy storage device i is = -0.1 / s. At this time, the system power difference ΔP is calculated according to Formula 1, including:

[0053]

[0054] Among them, the system power difference ΔP is a negative value, which means that the power supply power is less than the load power;

[0055] Then, according to Formula 2, the charging and discharging power P adapted by the energy storage device i is calculated when the real-time system frequency exceeds the upper and lower limits of the preset range. i ; Assume that k is 2, and the system power difference ΔP = -4; Specifically:

[0056]

[0057] Calculation result P i A negative value indicates that the energy storage element needs to be discharged, and the absolute value of the calculation result is less than the maximum nominal power 1MW; therefore, the energy storage device i can be controlled to discharge in turn; if the calculation result P i If the maximum rated power exceeds 1MW, the maximum power output of the energy storage device i can be used. Based on a 60% charge rate of 1MWh, the discharge time is approximately 0.75h (45min).

[0058] In summary, in the embodiment of the present invention, real-time monitoring of the frequency of the new power system and the charge rate of the energy storage device, as well as the basic parameters of the energy storage device within the new power system (the total power of all energy storage devices participating in frequency regulation in the new power system) is utilized to perform frequency regulation of the new power system according to a preset algorithm. The energy storage device can be used to actively stabilize the frequency of the new power system without the need for an energy management platform or scheduling and control. Since the energy storage device in the embodiment of the present invention can determine the real-time adaptive charging and discharging power of the energy storage device based on its own real-time charge rate and the real-time system frequency of the new power system, the active and effective real-time support for the frequency stabilization of the new power system in the embodiment of the present invention does not require the participation of an energy management platform or scheduling and control, thereby reducing dependence on large-scale communication systems and is particularly suitable for large-scale, distributed energy storage device applications.

[0059] Specifically, in the application scenario of the embodiment of the present invention, the energy storage devices in the new power system are widely distributed and dispersed, and the reliability of the communication channel and the control system is a key factor affecting the regulation effect; the local self-regulation method in the embodiment of the present invention that is free from the participation of the energy management platform or dispatching and control can not only reduce the energy management platform or dispatching's erroneous prediction of the power generation and consumption balance, but also avoid the loss of control of the frequency stability control of the new power system caused by the paralysis of the communication system.

[0060] Example 2

[0061] In another aspect of the embodiment of the present invention, a method for controlling the charge and discharge of an energy storage device is also provided. Figure 2 A schematic diagram showing the steps of a charge and discharge control method for an energy storage device according to an embodiment of the present invention is shown. The charge and discharge control method for an energy storage device is based on Figure 1 The charge and discharge control device of the energy storage device described in the corresponding embodiment, the new power system in the embodiment of the present invention includes an energy storage device provided with an energy storage converter PCS, and a real-time monitoring unit and a control unit corresponding to each energy storage device respectively. The charge and discharge control method of the embodiment of the present invention includes the steps of:

[0062] S11, obtaining the real-time system frequency of the power system;

[0063] S12. When the real-time system frequency exceeds the upper and lower limits of a preset interval, calculating the real-time adaptive charge and discharge power of the energy storage device according to a preset algorithm using the real-time system frequency as a parameter;

[0064] S13. According to the real-time adapted charging and discharging power, the PCS adjusts the charging and discharging power of the energy storage device.

[0065] Preferably, in an embodiment of the present invention, the preset algorithm includes:

[0066] Calculate the active power shortage ΔP of the new power system. The calculation formula includes:

[0067]

[0068] Among them, ΔP is the active power shortage of the entire new power system; ECs is the equivalent inertia value of the new power system; fs is the real-time system frequency at the time when the disturbance occurs at the node to which the energy storage device belongs; f N is the rated frequency;

[0069] Calculate the real-time adaptive charging and discharging power P of the energy storage device i , the calculation formula includes:

[0070]

[0071] Wherein, k is greater than 1 and less than 3; ΔP is the active power shortage of the new power system; P imax is the maximum charge and discharge power of the energy storage device i; ΣP ES It is the total power of all energy storage devices participating in frequency regulation in the novel power system.

[0072] Preferably, in the embodiment of the present invention, the preset interval includes: ±0.2H Z .

[0073] Preferably, in the embodiment of the present invention, the real-time adaptive charging and discharging power P of the energy storage device i is calculated. i , also includes the preconditions:

[0074] |P i |<P imax .

[0075] Preferably, in the embodiment of the present invention, it further includes:

[0076] When the current charging energy of the energy storage device ≮E cmax , or, current discharge energy ≮E dmax When the PCS is stopped, the charging and discharging power of the energy storage device is adjusted; wherein, E cmax is the maximum charging capacity calculated based on the real-time charge rate SOC; E dmax It is the maximum discharge capacity calculated based on the real-time charge rate SOC.

[0077] Since the working principle and beneficial effects of the charge and discharge control method of the energy storage device in the embodiment of the present invention have been Figure 1 The corresponding charge and discharge control device of the energy storage device is also recorded and explained, so they can be referenced with each other and will not be repeated here.

[0078] Example 3

[0079] Corresponding to the method embodiments, embodiments of the present invention also provide a charge and discharge control device for an energy storage device, such as a terminal or server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be, but is not limited to, a smartphone, tablet computer, laptop computer, or desktop computer.

[0080] An example diagram of a hardware structure block diagram of a charge and discharge control device for an energy storage device provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown, this may include:

[0081] Processor 1, communication interface 2, memory 3 and communication bus 4;

[0082] The processor 1, the communication interface 2, and the memory 3 communicate with each other via the communication bus 4;

[0083] Optionally, the communication interface 2 may be an interface of a communication module, such as an interface of a GSM module;

[0084] The processor 1 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0085] The memory 3 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0086] The processor 1 is specifically configured to execute the computer program stored in the memory 3 to perform the following steps:

[0087] S11. Obtaining the real-time system frequency of the novel power system;

[0088] S12. When the real-time system frequency exceeds the upper and lower limits of a preset interval, calculating the real-time adaptive charge and discharge power of the energy storage device according to a preset algorithm using the real-time system frequency as a parameter;

[0089] S13. According to the real-time adapted charging and discharging power, the PCS adjusts the charging and discharging power of the energy storage device.

[0090] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the system frequency control method of the power system provided by the embodiment of the present invention.

[0091] Example 4

[0092] In an embodiment of the present invention, a storage medium is further provided. The storage medium may store a program suitable for execution by a processor, wherein the program is used to:

[0093] S11. Obtaining the real-time system frequency of the novel power system;

[0094] S12. When the real-time system frequency exceeds the upper and lower limits of a preset interval, calculating the real-time adaptive charge and discharge power of the energy storage device according to a preset algorithm using the real-time system frequency as a parameter;

[0095] S13. According to the real-time adapted charging and discharging power, the PCS adjusts the charging and discharging power of the energy storage device.

[0096] Optionally, the detailed functions and extended functions of the program may refer to the above description.

[0097] The above-mentioned product can execute the method provided by the embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the methods provided by other embodiments of the present invention.

[0098] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0099] In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0100] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0101] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0102] It should be understood that in the embodiments of the present application, the various embodiments and features can be combined with each other to solve the aforementioned technical problems.

[0103] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0104] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the charge and discharge of an energy storage device, for stabilizing the system frequency of a new power system, characterized in that: Including steps: S11. Obtaining preset information data; the information data includes the real-time charge rate of the energy storage device, the real-time system frequency of the novel power system, and the total power of all energy storage devices participating in frequency regulation in the novel power system; S12. When the real-time system frequency exceeds the upper and lower limits of a preset interval, calculating the real-time adaptive charge and discharge power of the energy storage device according to a preset algorithm using the information data as a parameter; S13. According to the real-time adapted charging and discharging power, the charging and discharging power of the energy storage device is adjusted by the energy storage converter PCS.

2. The charge and discharge control method of the energy storage device according to claim 1, characterized in that: The preset interval is determined according to the system capacity or safety and stability range, including: ±0.2H Z .

3. The charge and discharge control method of the energy storage device according to claim 2, characterized in that: The preset algorithm includes: The active power shortage ΔP of the new power system is calculated based on the system frequency change rate. The calculation formula includes: Among them, ΔP is the active power shortage of the entire new power system; E Cs is the equivalent inertia value of the new power system; fs is the real-time system frequency at the time when the disturbance of the node to which the energy storage device belongs occurs; f N is the rated frequency; Calculate the real-time adaptive charging and discharging power P of the energy storage device i , the calculation formula includes: Where, 3≥k>1; ΔP is the active power shortage of the new power system; P imax is the maximum charge and discharge power of the energy storage device i or the power of the energy storage device PCS; ΣP ES It is the total power of all energy storage devices participating in frequency regulation in the novel power system.

4. The charge and discharge control method of the energy storage device according to claim 3, characterized in that: Calculate the real-time adaptive charging and discharging power P of the energy storage device i , also includes the preconditions: |P i |<P imax 。 5. The charge and discharge control method of the energy storage device according to claim 4, characterized in that: Also includes: When the current charging energy of the energy storage device ≮E cmax , or, current discharge energy ≮E dmax When the PCS is stopped, the charging and discharging power of the energy storage device is adjusted; wherein, E cmax is the maximum charging capacity calculated based on the real-time charge rate SOC of the energy storage device; E dmax It is the maximum discharge capacity calculated based on the real-time charge rate SOC.

6. The charge and discharge control method of the energy storage device according to claim 3, characterized in that: include: 2≥k＞1.3。 7. A charge and discharge control device for an energy storage device, used to stabilize the system frequency of a new power system, characterized in that: The energy storage device is provided with an energy storage converter PCS; the charge and discharge control device includes a real-time monitoring unit and a control unit; The real-time monitoring unit is used to monitor the real-time system frequency of the novel power system and the real-time charge rate of the energy storage device; The control strategy included in the control unit includes: When the real-time system frequency exceeds the upper and lower limits of the preset interval, the real-time adaptive charge and discharge power of the energy storage device is calculated according to a preset algorithm using the real-time system frequency, the real-time charge rate and as parameters; The charging and discharging power of the energy storage device is adjusted by the PCS according to the real-time adapted charging and discharging power.

8. The charge and discharge control device for the energy storage device according to claim 7, characterized in that: The preset interval is determined according to the system capacity or safety and stability range, including: ±0.2H Z .

9. The charge and discharge control device for the energy storage device according to claim 8, characterized in that: The preset algorithm includes: The active power shortage ΔP of the new power system is calculated based on the system frequency change rate. The calculation formula includes: Among them, ΔP is the active power shortage of the entire new power system; E Cs is the equivalent inertia value of the new power system; fs is the real-time system frequency at the time when the disturbance of the node to which the energy storage device belongs occurs; f N is the rated frequency; Calculate the real-time adaptive charging and discharging power P of the energy storage device i , the calculation formula includes: Where, 3≥k>1; ΔP is the active power shortage of the new power system; P imax is the maximum charge and discharge power of the energy storage device i or the power of the energy storage device PCS; ΣP ES It is the total power of all energy storage devices participating in frequency regulation in the novel power system.

10. The charge and discharge control device of the energy storage device according to claim 9, characterized in that: Calculate the real-time adaptive charging and discharging power P of the energy storage device i , also includes the preconditions: |P i |<P imax 。 11. The charge and discharge control device for an energy storage device according to claim 10, characterized in that: Also includes: When the current charging energy of the energy storage device ≮E cmax , or, current discharge energy ≮E dmax When the PCS is stopped, the charging and discharging power of the energy storage device is adjusted; wherein, E cmax is the maximum charging capacity calculated based on the real-time charge rate SOC of the energy storage device; E dmax It is the maximum discharge capacity calculated based on the real-time charge rate SOC.

12. The charge and discharge control device for an energy storage device according to claim 9, characterized in that: include: 2≥k＞1.3。 13. A new type of system frequency control device for a power system, characterized in that: include: memory for storing computer programs; A processor is used to call and execute the computer program to implement the steps of the system frequency control method of the new power system as described in claims 1-6.

14. A storage medium, characterized in that The system comprises a software program, wherein the software program is suitable for executing the steps of the system frequency control method of the novel power system according to claims 1 to 6 by a processor.

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