Thermal power storage segmented boosting confluence segmented SOP system and thermal power storage segmented boosting confluence segmented SOP method

Abstract

The invention discloses a thermal power storage segmented boost confluence segmented SOP system and method, and relates to the technical field of thermal power storage, and the method is characterized in that electric energy generated by generators enters a thermal power storage segmented grid-connected unit through outlets of a first generator and a second generator; electric energy enters an A set of high-voltage SOP and a B set of high-voltage SOP in the energy storage and convergence power electronic boost subsection SOP unit, the A set of high-voltage SOP and the B set of high-voltage SOP receive the electric energy from the first generator and the second generator respectively, convergence is carried out through an energy storage 20kV convergence bus, and the converged electric energy is subjected to voltage reduction through a power electronic transformer and is reduced from 20kV to 6kV. According to the system, the energy storage 690V bus is connected through the distributed energy storage device and the current converter, then is boosted to 20kV through the low-voltage booster and the power electronic transformer, and finally is connected to the outlet of the generator through the high-voltage SOP, so that the flexible adjustment of the energy storage power is realized, and the output electric quantity of the generator is not influenced.

Description

Technical Field

[0001] The present invention relates to the field of thermal power energy storage technology, and in particular to a thermal power energy storage segmented boosting and converging segmented SOP (Static Synchronous Compensator) system and method. Background Art

[0002] The traditional large-scale thermal power plant power system mainly relies on power frequency transformers for voltage conversion. As the capacity of the unit increases, the capacity of the power system is also increasing, resulting in a larger capacity of high-frequency transformers and an increase in short-circuit current in the power system, which puts higher requirements on the short-circuit breaking capacity of high-voltage switches. At the same time, in order to meet the requirements of short-circuit thermal stability, the high-voltage cables of the power system need to be thicker, which undoubtedly increases the investment cost.

[0003] In order to solve the problems faced by traditional AC power supply systems, DC networking has gradually attracted attention in recent years. Compared with traditional AC power supply systems, DC networking has the advantages of larger power supply capacity, no need to consider phase angle and frequency, and can realize asynchronous system interconnection. In addition, DC networking can also improve power conversion efficiency, reduce equipment loss, and realize load variable frequency drive, thereby simplifying the internal circuit of the load and reducing the failure rate and equipment cost.

[0004] However, in the actual application of thermal storage systems, how to more effectively use energy storage technology to improve the frequency regulation performance of thermal power units remains a challenge. To this end, we proposed a new type of thermal power energy storage segmented boosting and converging segmented SOP system. The system is connected to the energy storage 690V bus through distributed energy storage devices and converters, and then boosted to 20kV through low-voltage boosters and power electronic transformers, and finally connected to the generator outlet through high-voltage SOP. In this way, the energy storage power can be flexibly adjusted without affecting the output power of the generator. At the same time, the virtual synchronous machine inertia damping parameter optimization control strategy is adopted in the high-voltage SOP, with the minimum sum of the square of frequency deviation and active power deviation as the objective function, which effectively balances the frequency oscillation and output active power oscillation, and realizes the friendly grid connection of thermal power configuration energy storage. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that as the capacity of the unit increases, the short-circuit current of the plant power system increases. In order to meet the requirements of short-circuit thermal stability, the high-voltage cable of the plant power system needs to be thicker, which undoubtedly increases the investment cost.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a thermal power energy storage segmented boosting and converging segmented SOP system, which includes a thermal power energy storage segmented grid-connected unit, including a first generator and a second generator arranged in the thermal power energy storage segmented grid-connected unit; the first generator and the second generator are respectively boosted to 330kV through a first main transformer and a second main transformer and connected to a 330kV power grid, and the outlets of the first generator and the second generator are connected to AC 20kV energy storage A and B segment busbars; an energy storage converging power electronic boosting segmented SOP unit, wherein the A set of high-voltage SOP and the B set of high-voltage SOP in the energy storage converging power electronic boosting segmented SOP unit are connected to the side of the thermal power energy storage segmented grid-connected unit as the motor side, and the motor sides of the A set of high-voltage SOP and the B set of high-voltage SOP are respectively connected through AC The 20kV energy storage A and B section busbars are connected to the outlets of the first generator and the second generator, and the energy storage sides on the other sides of the A set high-voltage SOP and the B set high-voltage SOP are connected through the energy storage 20kV busbar busbar, and the busbar of the energy storage 20kV busbar is connected to the high-voltage side of the power electronic transformer, and the power electronic transformer converts the 20kV energy storage voltage into 6kV; the distributed energy storage segmented boost busbar unit is connected to the low-voltage side of the power electronic transformer through the energy storage access switch, the A set energy storage sending switch and the B set energy storage sending switch in the distributed energy storage segmented boost busbar unit, and the A set energy storage low-voltage busbar boost transformer and the B set energy storage low-voltage busbar boost transformer. The A section and B section energy storage 690V busbars are connected to the distributed energy storage module through the PCS commutation device.

[0008] As a preferred solution of the thermal power energy storage segmented boost and confluence segmented SOP system described in the present invention, wherein: the A set of high-voltage SOP and the B set of high-voltage SOP are two sets of high-voltage flexible commutation devices, and a virtual synchronous machine inertia damping parameter optimization control strategy is adopted.

[0009] As a preferred solution of the thermal power energy storage segmented boost and convergence segmented SOP system described in the present invention, an energy storage switch is provided between the PCS commutation device and the A and B segment energy storage 690V busbars to control the storage and release of electric energy.

[0010] Another object of the present invention is to provide a method for a thermal power energy storage segmented boosting and converging segmented SOP system.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: the electric energy generated by the generator enters the thermal power energy storage segmented grid-connected unit through the outlets of the first generator and the second generator; the electric energy enters the A set high-voltage SOP and the B set high-voltage SOP in the energy storage converging power electronic boost segmented SOP unit, respectively receiving the electric energy from the first generator and the second generator, and converging through the energy storage 20kV converging busbar, and the converged electric energy is stepped down by the power electronic transformer from 20kV to 6kV; the virtual synchronous machine inertia damping parameter optimization control strategy is adopted in the A set high-voltage SOP and the B set high-voltage SOP; the A section and the B section energy storage 690V busbars in the distributed energy storage segmented boost converging unit are connected to the distributed energy storage module through the PCS commutation device to store and convert the electric energy; the stored electric energy is boosted to 6kV by the A set and the B set energy storage low-voltage converging boost transformer, and then sent to the energy storage converging power electronic boost segmented SOP unit through the A set and the B set energy storage sending switch and the energy storage access switch.

[0012] As a preferred solution of the thermal power energy storage segmented boosting and converging segmented SOP system and method described in the present invention, the virtual synchronous machine inertia damping parameter optimization control strategy includes adopting virtual synchronous control in the A set and B set high-voltage SOP, and the rotor motion equation formula is expressed as: , in, is the power angle, For time, is the derivative of the power angle with respect to time, The output angular velocity of the high voltage SOP of sets A and B, Derivative of the output angular velocity of the high-voltage SOP of sets A and B with respect to time, is the initial value of angular velocity; is the inertia, is the damping coefficient, is the mechanical torque, is the electromagnetic torque.

[0013] As a preferred solution of the thermal power energy storage segmented boosting and converging segmented SOP system and method described in the present invention, the virtual synchronous machine inertia damping parameter optimization control strategy also includes optimizing the parameters of the virtual synchronous machine inertia and damping coefficient with the goal of minimizing the sum of the squares of the frequency deviation and the active power deviation, and the constructed objective function is expressed as: , in, For the goal, is the sum of the squares of frequency deviation and active power deviation, is the number of VSG (virtual synchronous generator); is the output angular frequency of the i-th set of high-voltage SOP; Output / absorb active power for the i-th set of high-voltage SOP; is the reference angular frequency of the i-th set of high voltage SOP; is the reference value of active power output / absorption of the i-th set of high-voltage SOP; according to the required and , substitute into the rotor motion equation formula, and find the optimal solution of the parameters of virtual synchronous machine inertia and damping coefficient.

[0014] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the method of a thermal power energy storage segmented boosting and converging segmented SOP system as described above are implemented.

[0015] A computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the steps of the method of a thermal power energy storage segmented boosting and converging segmented SOP system as described above are implemented.

[0016] The beneficial effects of the present invention are as follows: the system of the present invention is connected to the energy storage 690V busbar through a distributed energy storage device and a converter, and then boosted to 20kV through a low-voltage booster and a power electronic transformer, and finally connected to the generator outlet through a high-voltage SOP. In this way, flexible adjustment of energy storage power is achieved, and the output power of the generator will not be affected. At the same time, a virtual synchronous machine inertia damping parameter optimization control strategy is adopted in the high-voltage SOP, with the frequency deviation and the minimum square sum of active power deviation as the objective function, effectively balancing the frequency oscillation and the output active power oscillation, and realizing the friendly grid connection of thermal power configuration energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 This is a structural diagram of a thermal power energy storage segmented boost and convergence segmented SOP system in Example 1.

[0019] Among them: 1. Thermal power energy storage segmented grid-connected unit; 11. First generator; 12. Second generator; 13. First main transformer; 14. Second main transformer; 15. Energy storage 20kV high-voltage grid-connected section A bus; 16. Energy storage 20kV high-voltage grid-connected section B bus; 17. Section A grid-connected switch; 18. Section B grid-connected switch; 19. 330k grid-connected system; 2. Energy storage converging power electronic boost segmented SOP unit; 21. A set of high-voltage SOP; 22. B set of high-voltage SOP; 23. AC to DC converter; 24. Capacitor; 25. DC transformer; 26. Capacitor; 27. DC to AC converter; 3. Distributed energy storage segmented boost converging unit; 31. Energy storage access switch; 32. A set of energy storage delivery switch; 33. A set of storage 34. A section energy storage 690V busbar; 35. A section #1 energy storage module connection switch; 36. A section #1 AC to DC converter; 37. A section #1 energy storage module; 38. A section #n energy storage module connection switch; 39. A section #n AC to DC converter; 310. A section #n energy storage module; 311. B set energy storage delivery switch; 312. B set energy storage low voltage busbar; 313. B section energy storage 690V busbar; 314. B section #1 energy storage module connection switch; 315. B section #1 AC to DC converter; 316. B section #1 energy storage module; 317. B section #m energy storage module connection switch; 318. B section #m AC to DC converter; 319. B section #m energy storage module. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] Example 1 Reference Figure 1 , which is the first embodiment of the present invention, and which provides a thermal power energy storage segmented boosting and converging segmented SOP system, including: Figure 1 As shown, it includes a thermal power energy storage segmented grid-connected unit 1, including a first generator 11 and a second generator 12 arranged in the thermal power energy storage segmented grid-connected unit 1; the first generator 11 and the second generator 12 are respectively boosted to 330 kV through a first main transformer 13 and a second main transformer 14 and connected to a 330 kV power grid, and the outlets of the first generator 11 and the second generator 12 are connected to AC 20 kV energy storage A and B busbars.

[0023] The energy storage converging power electronic boosting segmented SOP unit 2, the A set high voltage SOP21 and the B set high voltage SOP22 in the energy storage converging power electronic boosting segmented SOP unit 2, are connected to the side of the thermal power energy storage segmented grid-connected unit 1 as the motor side, the motor sides of the A set high voltage SOP21 and the B set high voltage SOP22 are respectively connected to the outlets of the first generator 11 and the second generator 12 through the AC 20kV energy storage A and B segment busbars, and the energy storage sides of the A set high voltage SOP21 and the B set high voltage SOP22 on the other side are connected through the energy storage 20kV busbar, and the busbar end of the energy storage 20kV busbar is connected to the high voltage side of the power electronic transformer, and the power electronic transformer converts the 20kV energy storage voltage into 6kV.

[0024] The distributed energy storage segmented boost bus unit 3 is connected to the A section and B section energy storage 690V busbars on the low-voltage side of the power electronic transformer through the energy storage access switch 31, the A set energy storage sending switch 32 and the B set energy storage sending switch 311 in the distributed energy storage segmented boost bus unit 3, and the A set energy storage low-voltage bus boost transformer 33 and the B set energy storage low-voltage bus boost transformer 312. The A section and B section energy storage 690V busbars are connected to the distributed energy storage module through the PCS commutation device.

[0025] A set of high-voltage SOP21 and B set of high-voltage SOP22 are two sets of high-voltage flexible commutation devices, and adopt the virtual synchronous machine inertia damping parameter optimization control strategy.

[0026] An energy storage switch is installed between the PCS commutation device and the 690V energy storage busbars of sections A and B to control the storage and release of electric energy.

[0027] A further improvement of the present invention is that a virtual synchronous machine inertia damping parameter optimization control strategy is adopted in the A and B high-voltage SOPs, with the minimum sum of the square of frequency deviation and active power deviation as the objective function, which can effectively balance the frequency oscillation and the output active power oscillation and realize the friendly grid connection of thermal power with energy storage.

[0028] Switch opening and closing and control method: The opening and closing of the switch is usually related to the current state of the system, such as whether it is in the power generation state, energy storage state or grid connection state. To protect the safety of equipment and system, when abnormal conditions such as overcurrent, overvoltage, undervoltage, etc. are detected, the relevant switch may be automatically disconnected. The control signal comes from the control system or the operator's control signal, which is used to open or close the switch as needed.

[0029] Linkage between generator output and energy storage circuit: When the generator generates excess electricity, the excess electricity can be sent to the energy storage circuit for storage through the control switch. When the system needs additional electricity, the energy storage circuit can release the stored electricity through the control switch to supplement the grid or meet other electricity needs.

[0030] Linkage between energy storage circuit and grid-connected circuit: The switch status in the energy storage circuit may be affected by the status of the grid-connected circuit. For example, when the grid fails or power restriction is required, the energy storage circuit may be disconnected from the grid to protect the safety of equipment and systems. When the grid returns to normal or the power supply needs to be increased, the energy storage circuit may be reconnected to the grid to release the stored energy.

[0031] Linkage between protection mechanism and switch: When the system detects an abnormal situation (such as overcurrent, overvoltage, etc.), the relevant protection switch may automatically disconnect to cut off the fault circuit and prevent the fault from spreading.

[0032] Linkage between control system and switch: The control system can monitor the system status information in real time and determine whether the switch status needs to be adjusted based on the preset control logic.

[0033] Example 2 The second embodiment of the present invention is different from the first embodiment in that: a method for a thermal power energy storage segmented boosting and converging segmented SOP system comprises: the electric energy generated by the generator enters the thermal power energy storage segmented grid-connected unit through the outlets of the first generator and the second generator; The electric energy enters the A-set high-voltage SOP and the B-set high-voltage SOP in the energy storage converging power electronic step-up segmented SOP unit, which receive the electric energy from the first generator and the second generator respectively, and converge through the energy storage 20kV converging bus. The converged electric energy is stepped down from 20kV to 6kV through the power electronic transformer; the virtual synchronous machine inertia damping parameter optimization control strategy is adopted in the A-set high-voltage SOP and the B-set high-voltage SOP.

[0034] The 690V busbars of sections A and B in the distributed energy storage segmented boost busbar unit are connected to the distributed energy storage module through the PCS commutation device to store and convert electric energy.

[0035] The stored electric energy is boosted to 6kV through the A and B energy storage low-voltage bus step-up transformers, and then sent to the energy storage bus power electronic step-up segmented SOP unit through the A and B energy storage delivery switches and energy storage access switches.

[0036] Ultimately, the entire system controls the power of sets A and B high-voltage SOPs to achieve energy storage power regulation and flexible grid connection, thereby assisting thermal power units in frequency regulation.

[0037] The virtual synchronous machine inertia damping parameter optimization control strategy is adopted, and virtual synchronous control is adopted in the A and B high-voltage SOPs. The rotor motion equation formula is expressed as: , in, is the power angle, For time, is the derivative of the power angle with respect to time, The output angular velocity of the high voltage SOP of sets A and B, Derivative of the output angular velocity of the high-voltage SOP of sets A and B with respect to time, is the initial value of angular velocity; is the inertia, is the damping coefficient, is the mechanical torque, is the electromagnetic torque.

[0038] There is a contradiction between the frequency oscillation and active power oscillation of the virtual synchronous machine. From the rotor motion equation, we know that the inertia The value of will not only affect The size of will also affect the oscillation of active power. It will also affect the oscillation of frequency and power. When the virtual synchronous machine system is connected to the grid and is disturbed, the system frequency and output active power will oscillate at the same time. In order to better balance the frequency oscillation and the output active power oscillation when oscillation occurs, a parameter optimization control method for the inertia and damping coefficient of the virtual synchronous machine is proposed with the goal of minimizing the sum of the squares of the frequency deviation and the active power deviation. The constructed objective function is expressed as, , in, For the goal, is the sum of the squares of frequency deviation and active power deviation, is the number of VSG (virtual synchronous generator); is the output angular frequency of the i-th set of high-voltage SOP; Output / absorb active power for the i-th set of high-voltage SOP; is the reference angular frequency of the i-th set of high voltage SOP; It is the reference value of active power output / absorption of the i-th set of high-voltage SOP.

[0039] The frequency and output active power are considered to be of the same level, and the weighting coefficients are both set to 1. Using the sum of squares of frequency and power deviations can avoid negative numbers in the integral. and , substituting into the rotor motion equation formula, the optimal solution of the parameters of the virtual synchronous machine inertia and the damping coefficient is found. When energy storage assists the frequency regulation of thermal power units, the frequency oscillation and the output active power oscillation can be better balanced.

[0040] Example 3 The third embodiment of the present invention is different from the first two embodiments in that: 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 invention, 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, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0041] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0042] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0043] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A thermal power energy storage segmented boosting and converging segmented SOP system, characterized by: include, A thermal power energy storage segmented grid-connected unit (1), comprising a first generator (11) and a second generator (12) arranged in the thermal power energy storage segmented grid-connected unit (1); the first generator (11) and the second generator (12) are respectively stepped up to 330 kV through a first main transformer (13) and a second main transformer (14) and connected to a 330 kV power grid, and the outlets of the first generator (11) and the second generator (12) are connected to AC 20 kV energy storage A and B busbars; An energy storage converging power electronic boosting segmented SOP unit (2), wherein the A set high voltage SOP (21) and the B set high voltage SOP (22) in the energy storage converging power electronic boosting segmented SOP unit (2) are connected to the motor side of the thermal power energy storage segmented grid-connected unit (1), the motor sides of the A set high voltage SOP (21) and the B set high voltage SOP (22) are connected to the outlets of the first generator (11) and the second generator (12) through the AC 20 kV energy storage A and B segment busbars respectively, the energy storage sides of the A set high voltage SOP (21) and the B set high voltage SOP (22) on the other side are connected through the energy storage 20 kV converging busbar, the converging end of the energy storage 20 kV converging busbar is connected to the high voltage side of the power electronic transformer, and the power electronic transformer converts the 20 kV energy storage voltage into 6 kV; The distributed energy storage segmented boosting and converging unit (3) is connected to the A-section and B-section energy storage 690V busbars on the low-voltage side of the power electronic transformer through the energy storage access switch (31), the A-set energy storage sending switch (32) and the B-set energy storage sending switch (311) in the distributed energy storage segmented boosting and converging unit (3), and the A-set energy storage low-voltage converging and boosting transformer (33) and the B-set energy storage low-voltage converging and boosting transformer (312). The A-section and B-section energy storage 690V busbars are connected to the distributed energy storage module through the PCS commutation device.

2. A thermal power energy storage segmented boosting and converging segmented SOP system as claimed in claim 1, characterized in that: The A set of high-voltage SOP (21) and the B set of high-voltage SOP (22) are two sets of high-voltage flexible commutation devices, and adopt a virtual synchronous machine inertia damping parameter optimization control strategy.

3. A thermal power energy storage segmented boosting and converging segmented SOP system as claimed in claim 2, characterized in that: An energy storage switch is provided between the PCS commutation device and the energy storage 690V busbars of sections A and B for controlling the storage and release of electric energy.

4. A method using a thermal power energy storage segmented boosting and converging segmented SOP system as claimed in any one of claims 1 to 3, characterized in that: include, The electric energy generated by the generator enters the thermal power energy storage segmented grid-connected unit through the outlets of the first generator and the second generator; The electric energy enters the A-set high-voltage SOP and the B-set high-voltage SOP in the energy storage converging power electronic step-up segmented SOP unit, which receive the electric energy from the first generator and the second generator respectively, and are converged through the energy storage 20kV converging busbar. The converged electric energy is stepped down from 20kV to 6kV through the power electronic transformer; The A set high-voltage SOP and the B set high-voltage SOP adopt a virtual synchronous machine inertia damping parameter optimization control strategy; The 690V busbars of Section A and Section B in the distributed energy storage segmented boost busbar unit are connected to the distributed energy storage module through the PCS commutation device to store and convert electric energy; The stored electric energy is boosted to 6kV through the A and B energy storage low-voltage bus step-up transformers, and then sent to the energy storage bus power electronic step-up segmented SOP unit through the A and B energy storage delivery switches and energy storage access switches.

5. A method for a thermal power energy storage segmented boosting and converging segmented SOP system as claimed in claim 4, characterized in that: The virtual synchronous machine inertia damping parameter optimization control strategy includes adopting virtual synchronous control in the A set and B set high-pressure SOP, and the rotor motion equation formula is expressed as: ， in, is the power angle, For time, is the derivative of the power angle with respect to time, The output angular velocity of the high voltage SOP of sets A and B, Derivative of the output angular velocity of the high-voltage SOP of sets A and B with respect to time, is the initial value of angular velocity; is the inertia, is the damping coefficient, is the mechanical torque, is the electromagnetic torque.

6. A method for a thermal power energy storage segmented boosting and converging segmented SOP system as claimed in claim 5, characterized in that: The virtual synchronous machine inertia damping parameter optimization control strategy also includes optimizing the parameters of the virtual synchronous machine inertia and damping coefficient with the goal of minimizing the sum of the square of the frequency deviation and the active power deviation. The constructed objective function is expressed as: ， in, For the goal, is the sum of the squares of frequency deviation and active power deviation, is the number of VSG; is the output angular frequency of the i-th set of high-voltage SOP; Output / absorb active power for the i-th set of high-voltage SOP; is the reference angular frequency of the i-th set of high voltage SOP; is the reference value of active power output / absorption of the i-th set of high-voltage SOP; According to the requested and , substitute into the rotor motion equation formula, and find the optimal solution of the parameters of virtual synchronous machine inertia and damping coefficient.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method of a thermal power energy storage segmented boosting and converging segmented SOP system described in any one of claims 5 to 6 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for a thermal power energy storage segmented boosting and converging segmented SOP system as described in any one of claims 5 to 6 are implemented.

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