Segmented energy storage interconnected direct-hanging generator set system and method

Abstract

The invention discloses a segmented energy storage interconnected direct-hanging generator set system and method, and relates to the technical field of power systems and energy storage, and the method comprises the steps: converting a direct current into an alternating current through a current converter, boosting the alternating current to 20kV, enabling the alternating current to run in parallel with a generator, and employing a self-adaptive droop control method to adjust the charging and discharging states in real time according to the frequency fluctuation of a power grid, the frequency modulation requirement is met and the power grid is kept stable. The distributed energy storage system is constructed, segmented boosting is achieved, the energy storage system is connected to the outlet of the thermal power generating unit, the thermal power generating unit is effectively assisted in frequency modulation, meanwhile, the auxiliary frequency modulation object of the energy storage system is flexibly adjusted by controlling on-off of the interconnection circuit breaker, and the A set or the B set of energy storage can assist different power generating units respectively; the flexibility and efficiency of frequency modulation are improved, and stable operation of a power grid is ensured.

Description

Technical Field

[0001] The present invention relates to the field of power systems and energy storage technology, and in particular to a segmented energy storage interconnected direct-mounted generator set system and method. Background Art

[0002] As the capacity of large thermal power units continues to increase, the capacity and demand of the power supply system for the plant also increase. The traditional high-voltage power plant transformer design uses a power frequency transformer for two-stage voltage transformation, which reduces the voltage from 20kV at the generator outlet to 6kV, and then further reduces the voltage to 400V to meet the needs of the power supply system for the plant. However, this design faces some challenges.

[0003] As the capacity of the unit increases, the capacity of the high-frequency transformer also needs to be increased accordingly, which leads to an increase in the short-circuit current of the power system. In order to meet the requirements of short-circuit thermal stability, thicker cables need to be selected, which increases the investment cost. Secondly, the traditional power frequency transformer is huge in size, and in order to obtain a larger power system capacity, it is often necessary to increase the capacity, which is not only costly, but also takes a long time to complete, which will affect the normal power generation of the power plant.

[0004] In order to solve these problems, the industry has begun to explore new forms of plant power systems. Among them, DC networking is considered to be a potential solution. Compared with traditional AC plant power systems, DC networking has the advantages of larger power supply capacity, no need to consider phase angle and frequency, and the ability to achieve asynchronous system interconnection. In addition, the plant load is connected to the DC plant power system through a rectifier, which can improve the efficiency of power conversion, reduce equipment losses, and realize load variable frequency drive, thereby simplifying the internal circuit of the load, reducing the failure rate and equipment cost.

[0005] The present invention proposes a segmented energy storage interconnected direct-mounted generator set system, which constructs distributed energy storage and is directly connected to the outlet of the thermal power generator through commutation and step-up transformer to assist the frequency regulation of the thermal power unit and solve the problems existing in the traditional plant power system. Summary of the invention

[0006] In view of the above-mentioned problems, the present invention is proposed.

[0007] Therefore, the technical problem solved by the present invention is that the traditional industrial frequency transformer is huge in size, and in order to obtain a larger plant power system capacity, it is often necessary to increase the capacity and transform it, which is not only very expensive, but also takes a long time to complete, and will affect the normal power generation of the power plant.

[0008] In order to solve the above technical problems, the present invention provides the following technical solution: a segmented energy storage interconnected direct-mounted generator set system, which comprises the following steps: Thermal power energy storage segmented high-voltage grid-connected unit and distributed energy storage converging segmented interconnected unit; in the thermal power energy storage segmented high-voltage grid-connected unit, #1 and #2 energy storage transformers are respectively connected to 20kV energy storage A and B segment busbars, and the 20kV energy storage A and B segment busbars are connected to the #1 and #2 generator outlets; the distributed energy storage converging segmented interconnected unit is divided into two sets of energy storage systems, A and B, and the 10kV energy storage A and B segment busbars are connected to the low-voltage side of #1 and #2 energy storage transformers through A and B sets of energy storage access circuit breakers and A and B sets of grid-connected circuit breakers; the 10kV energy storage A and B segment busbars are connected through an interconnected circuit breaker; the A and B two energy storage systems output 10kV AC power through their respective converters, and are connected to the 10kV energy storage A and B segment busbars through energy storage access circuit breakers.

[0009] The 10kV energy storage A and B section busbars are responsible for transmitting the alternating current output by the energy storage system.

[0010] Another object of the present invention is to provide a method for interconnecting segmented energy storage and directly hanging generator sets, which can directly connect the energy storage system to the outlet of the thermal power unit through the coordinated work of the distributed energy storage system and the commutation and boosting equipment, thereby realizing the efficient power supply and frequency regulation function of the plant power system, and solving the problems of excessive short-circuit current, high equipment investment, low energy conversion efficiency and difficulty in expansion and transformation in the existing high-voltage plant transformer system.

[0011] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for interconnecting and directly hanging generator sets with segmented energy storage, comprising: The A and B distributed energy storage systems convert DC power into 10kV AC power through their respective converters, and output it to the 10kV energy storage A section bus and the 10kV energy storage B section bus.

[0012] The 10kV energy storage section A bus and the 10kV energy storage section B bus are connected through an interconnecting circuit breaker. The AC power output by the 10kV energy storage section A and section B bus is boosted to 20kV through the energy storage transformer and output to the outlets of #1 generator and #2 generator respectively, and runs in parallel with the generators.

[0013] Control the charging and discharging status of the energy storage system according to frequency regulation requirements.

[0014] Through the adaptive droop control method, the frequency droop coefficient and voltage droop coefficient of the energy storage system are adjusted in real time, and the charging and discharging state of the energy storage system is controlled according to the frequency fluctuation of the thermal power unit.

[0015] As a preferred solution of the segmented energy storage interconnected direct-mounted generator set method described in the present invention, after the 10kV energy storage section A bus and the 10kV energy storage section B bus are connected through the interconnection circuit breaker, when the A set of energy storage is needed to assist the frequency regulation of the #2 generator set, the B set of distributed energy storage grid-connected switch is disconnected and the interconnection circuit breaker is closed.

[0016] When the B set of energy storage is needed to assist the frequency regulation of the #1 generator set, the A set of distributed energy storage grid-connected switch is disconnected and the interconnecting circuit breaker is closed.

[0017] As a preferred solution of the segmented energy storage interconnected direct-mounted generator set method described in the present invention, wherein: the charging and discharging state of the energy storage system is controlled according to the frequency regulation demand, including that when the frequency of the thermal power unit drops to less than or equal to a threshold, the energy storage system discharges to replenish energy, and when the frequency of the thermal power unit rises to exceed the threshold, the energy storage system charges to absorb energy.

[0018] As a preferred solution of the segmented energy storage interconnection and direct-mounted generator set method described in the present invention, the basic formula of the adaptive droop control method is expressed as follows: , Where f is the actual output frequency of the energy storage system, is the reference frequency of the energy storage system, is the frequency droop coefficient, P is the actual output power of the energy storage system, is the reference output power of the energy storage system, V is the actual output voltage of the energy storage system, is the reference voltage of the energy storage system, is the voltage droop coefficient, Q is the actual output reactive power of the energy storage system, It is the reference reactive power of the energy storage system.

[0019] As a preferred solution of the segmented energy storage interconnection and direct-mounted generator set method described in the present invention, the adaptive expression of the frequency droop coefficient is: , in, It is the basic value of the droop coefficient, which is usually determined according to the rated parameters and design requirements of the energy storage system. is the adjustment coefficient of the frequency deviation on the droop coefficient, is the absolute value of the frequency deviation of the energy storage system, It is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient. SOC is the energy storage system's state of charge, which indicates the remaining capacity of the energy storage system. It is the maximum frequency deviation allowed by the energy storage system and is used to normalize the frequency deviation to ensure that the droop coefficient varies within a reasonable range.

[0020] As a preferred solution of the segmented energy storage interconnection and direct-mounted generator set method described in the present invention, the adaptive expression of the voltage droop coefficient is: , in, is the basic value of the voltage droop coefficient, is the adjustment coefficient of the voltage deviation on the droop coefficient, is the absolute value of the voltage deviation of the energy storage system, is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient, is the rated voltage of the energy storage system, which is used to normalize the voltage deviation.

[0021] 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 above-mentioned method for interconnecting and directly connecting generator sets with segmented energy storage are implemented.

[0022] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for interconnecting and directly connecting generator sets with segmented energy storage.

[0023] Beneficial effects of the present invention: The distributed energy storage structure of the present invention is transformed into 10kV AC through commutation and boosting, and is divided into two sections, A and B. The 10kV energy storage A and B busbars are connected through an interconnecting circuit breaker. The 10kV energy storage A and B busbars are connected to the 20kV energy storage A and B busbars through #1 and #2 energy storage transformers respectively. The 20kV energy storage A and B busbars are connected to the #1 and #2 generator outlets, so as to achieve the purpose of distributed energy storage segmented boosting and connecting to the outlet of thermal power generators to assist the frequency regulation of thermal power units. Furthermore, by opening / breaking the interconnecting circuit breaker, the purpose of A set of energy storage assisting the frequency regulation of the #2 generator unit and B set of energy storage assisting the frequency regulation of the #1 generator unit can be achieved. Under normal circumstances, the interconnecting circuit breaker is disconnected, and the A set of energy storage assists the #1 thermal power unit, and the B set of energy storage assists the #2 thermal power unit. When the A set of energy storage assists the frequency regulation of the #2 generator set, the B set of distributed energy storage grid-connected switch is disconnected and the interconnecting circuit breaker is closed; when the B set of energy storage assists the frequency regulation of the #1 generator set, the A set of distributed energy storage grid-connected switch is disconnected and the interconnecting circuit breaker is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 The overall framework diagram of the segmented energy storage interconnected direct-mounted generator set system provided for the first embodiment of the present invention.

[0026] Figure 2 An overall flow chart of the invention of a segmented energy storage interconnected direct-mounted generator set provided for the second embodiment of the present invention.

[0027] In the figure: 1. Thermal power energy storage segmented high-voltage grid-connected unit; 2. Distributed energy storage convergence segmented interconnected unit; 1-1. #1 generator; 1-2. #1 main transformer; 1-3. 300kV busbar; 1-4. #1 energy storage transformer; 1-5. Energy storage boost transformer high-voltage section A grid-connected switch; 1-7. Energy storage boost transformer high-voltage section B grid-connected switch; 1-8. #2 generator; 1-9. #2 main transformer; 2-2. 10KV energy storage section A busbar; 2-11. 10kV busbar tie switch; 2-4. Section A #1 energy storage transformer; 2-8. Section A #n energy storage transformer; 2-14. Section B #1 energy storage transformer ; 2-18, Section B #n energy storage transformer; 2-5, energy storage system converter cabinet 1; 2-9, energy storage system converter cabinet n; 2-15, energy storage system converter cabinet 1; 2-19, energy storage system converter cabinet m; 2-6, #1 energy storage module; 2-10, #n energy storage module; 2-16, #1 energy storage module; 2-20, #m energy storage module; 2-1, Section A energy storage access switch; 2-3, Section A energy storage #1 energy storage access switch; 2-7, Section A energy storage #2 energy storage access switch; 2-17, Section B energy storage #n energy storage access switch; 2-13, Section B energy storage #1 energy storage access switch. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, 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 drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0029] Example 1, reference Figure 1 , which is an embodiment of the present invention, provides a segmented energy storage interconnected direct-mounted generator set system, including: Thermal power energy storage segmented high-voltage grid-connected unit 1 and distributed energy storage convergence segmented interconnected unit 2.

[0030] In the thermal power energy storage segmented high-voltage grid-connected unit 1, the #1 and #2 energy storage transformers are connected to the 20kV energy storage A and B section busbars respectively, and the 20kV energy storage A and B section busbars are connected to the #1 and #2 generator outlets.

[0031] The distributed energy storage bus segment interconnection unit 2 is divided into two energy storage systems, A and B. The 10kV energy storage A and B busbars are connected to the low-voltage side of #1 and #2 energy storage transformers through A and B energy storage access circuit breakers and A and B grid-connected circuit breakers.

[0032] The 10kV energy storage A and B section busbars are connected through an interconnecting circuit breaker.

[0033] The two energy storage systems A and B output 10kV AC power through their respective converters, and are connected to the 10kV energy storage A and B busbars through energy storage access breakers.

[0034] The 10kV energy storage A and B section busbars are responsible for transmitting the AC power output by the energy storage system.

[0035] A further improvement of the present invention is that, in order to realize energy storage interconnection, the segmented energy storage can assist the frequency regulation of different thermal power units, and an interconnection circuit breaker is used. When the A-section energy storage assists the #1 thermal power unit and the B-section energy storage assists the #2 thermal power unit in frequency regulation, the interconnection circuit breaker is disconnected; when the A-set energy storage assists the #2 generator unit in frequency regulation, the B-set distributed energy storage grid-connected switch is disconnected and the interconnection circuit breaker is closed; when the B-set energy storage assists the #1 generator unit in frequency regulation, the A-set distributed energy storage grid-connected switch is disconnected and the interconnection circuit breaker is closed; when the A-set and B-set energy storage assist the #1 generator unit in frequency regulation, the interconnection circuit breaker is closed, and the B-set energy storage access circuit breaker is disconnected from the B-set grid-connected circuit breaker; when the A-set and B-set energy storage assist the #2 generator unit in frequency regulation, the interconnection circuit breaker is closed, and the A-set energy storage access circuit breaker is disconnected from the A-set grid-connected circuit breaker.

[0036] A further improvement of the present invention is that by adopting a direct-hanging scheme for energy storage to access the generator outlet, the energy storage can be regarded as a stable voltage source connected in parallel with the generator to jointly constitute a controllable and adjustable power source point and participate in various adjustments of the power system. By adopting the direct-hanging scheme, there is no need to consider the problem of high-plant variable capacity, and it will not affect the primary system and secondary protection system of the original unit.

[0037] Example 2, reference Figure 2 , which is an embodiment of the present invention, provides a method for interconnecting a segmented energy storage directly mounted generator set, characterized in that: S1: The A and B distributed energy storage systems convert DC power into 10kV AC power through their respective converters, and output it to the 10kV energy storage A section bus and the 10kV energy storage B section bus.

[0038] Furthermore, the 10kV energy storage A and B section busbars serve as a connecting bridge between the energy storage system and the energy storage transformer, responsible for transmitting the AC power output by the energy storage system.

[0039] The two busbar sections are connected via an interconnection circuit breaker to achieve interconnection and energy dispatch between energy storage systems. The interconnection circuit breaker is used to control the electrical connection status between the A and B energy storage systems.

[0040] After the 10kV energy storage section A busbar and the 10kV energy storage section B busbar are connected through the interconnection circuit breaker, when the A set of energy storage is needed to assist the frequency regulation of the #2 generator set, the B set of distributed energy storage grid-connected switch is disconnected and the interconnection circuit breaker is closed.

[0041] When the B set of energy storage is needed to assist the frequency regulation of the #1 generator set, the A set of distributed energy storage grid-connected switch is disconnected and the interconnecting circuit breaker is closed.

[0042] Under normal circumstances, the interconnected circuit breaker is disconnected, and the A set of energy storage assists the #1 thermal power unit, and the B set of energy storage assists the #2 thermal power unit.

[0043] S2: The 10kV energy storage section A bus and the 10kV energy storage section B bus are connected through an interconnecting circuit breaker. The AC power output by the 10kV energy storage section A and section B bus is boosted to 20kV through the energy storage transformer and output to the outlets of #1 generator and #2 generator respectively, and run in parallel with the generators.

[0044] The generator outlet is the connection point between the thermal power unit and the power grid, and is also the key point for the energy storage system to access the thermal power unit.

[0045] By directly connecting the energy storage system to the generator outlet, the energy storage can be regarded as a stable voltage source connected in parallel with the generator, together forming a controllable and adjustable power source point.

[0046] S3: Control the charging and discharging status of the energy storage system according to the frequency modulation requirements.

[0047] The charging and discharging state of the energy storage system is controlled according to the frequency regulation demand, including that when the frequency of the thermal power unit drops to less than or equal to the threshold, the energy storage system discharges to replenish energy, and when the frequency of the thermal power unit rises to exceed the threshold, the energy storage system charges to absorb energy.

[0048] Specifically, the energy storage system monitors the frequency fluctuations of the thermal power units and controls the charging and discharging status of the energy storage system according to the frequency regulation requirements. When the frequency of the thermal power units decreases, the energy storage system discharges to replenish energy; when the frequency of the thermal power units increases, the energy storage system charges to absorb excess energy. By accurately controlling the charging and discharging rate and capacity of the energy storage system, the frequency stability of the thermal power units can be achieved.

[0049] Interconnection control logic: The on / off state of the interconnection circuit breaker is determined by the system control logic according to the frequency regulation requirements and the state of the energy storage system. When the A-set energy storage is needed to assist the frequency regulation of the #2 generator set, the system control logic will disconnect the B-set distributed energy storage grid-connected switch and close the interconnection circuit breaker; vice versa. This flexible control method enables the system to flexibly dispatch energy storage resources according to actual needs.

[0050] In the segmented energy storage interconnected direct-mounted generator system, especially in the energy storage frequency regulation unit, the use of adaptive droop control can effectively adjust the output of the energy storage system to assist the thermal power unit in frequency regulation. Adaptive droop control is a commonly used control strategy for distributing current and power among multiple parallel power sources or energy storage systems while maintaining system stability and frequency accuracy.

[0051] S4: Through the adaptive droop control method, the frequency droop coefficient and voltage droop coefficient of the energy storage system are adjusted in real time, and the charging and discharging state of the energy storage system is controlled according to the frequency fluctuation of the thermal power unit.

[0052] The basic formula of the adaptive droop control method is expressed as, (1) Where f is the actual output frequency of the energy storage system, is the reference frequency of the energy storage system, is the frequency droop coefficient, P is the actual output power of the energy storage system, is the reference output power of the energy storage system, V is the actual output voltage of the energy storage system, is the reference voltage of the energy storage system, is the voltage droop coefficient, Q is the actual output reactive power of the energy storage system, It is the reference reactive power of the energy storage system.

[0053] The adaptive expression of the frequency droop coefficient is: (2) in, It is the basic value of the droop coefficient, which is usually determined according to the rated parameters and design requirements of the energy storage system. is the adjustment coefficient of the frequency deviation on the droop coefficient, is the absolute value of the frequency deviation of the energy storage system, It is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient. SOC is the energy storage system's state of charge, which indicates the remaining capacity of the energy storage system. It is the maximum frequency deviation allowed by the energy storage system and is used to normalize the frequency deviation to ensure that the droop coefficient varies within a reasonable range.

[0054] The adaptive expression of voltage droop coefficient is: (3) in, is the basic value of the voltage droop coefficient, is the adjustment coefficient of the voltage deviation on the droop coefficient, is the absolute value of the voltage deviation of the energy storage system, is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient, is the rated voltage of the energy storage system, which is used to normalize the voltage deviation.

[0055] Formula (2) and Formula (3) can adjust the droop coefficient in real time according to the current frequency deviation |Δω| and voltage deviation |ΔV| of the system, thereby realizing rapid regulation of the output power of the energy storage system. By introducing the nonlinear relationship between system state variables (such as frequency deviation, voltage deviation and SOC), the formula can more accurately reflect the actual operation of the system and improve control accuracy. The formula takes into account the influence of the state of charge (SOC) of the energy storage system on the droop coefficient, which helps to optimize the utilization efficiency of the energy storage system while maintaining system stability and avoiding overcharging or over-discharging. By introducing the maximum frequency deviation and rated voltage After normalization, the formula can ensure that the droop coefficient varies within a reasonable range and avoid system instability in extreme cases.

[0056] By adaptively adjusting the droop coefficient, the formula helps maintain the stability of system frequency and voltage and improve the overall stability and reliability of the power system. When a system failure or abnormal situation occurs, the formula can quickly adjust the output power of the energy storage system to reduce the impact of the failure on the system and improve the system's fault tolerance and recovery speed.

[0057] Adaptive droop coefficient and The expression of has significant advantages when using adaptive droop control in energy storage frequency regulation units, which can significantly improve the system's dynamic response capability, flexibility and scalability, as well as stability and reliability. These advantages help optimize the efficiency of energy storage systems and improve the overall performance and reliability of power systems.

[0058] 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 for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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. The segmented energy storage interconnected direct-mounted generator set system is characterized by: include: A thermal power energy storage segmented high voltage grid-connected unit (1) and a distributed energy storage converging segmented interconnected unit (2); The #1 and #2 energy storage transformers in the thermal power energy storage segmented high-voltage grid-connected unit (1) are connected to 20 kV energy storage segment A and B busbars respectively, and the 20 kV energy storage segment A and B busbars are connected to the #1 and #2 generator outlets; The distributed energy storage bus segment interconnection unit (2) is divided into two energy storage systems, A and B. The 10kV energy storage A and B busbars are connected to the low voltage side of #1 and #2 energy storage transformers through A and B energy storage access circuit breakers and A and B grid-connected circuit breakers; The 10kV energy storage A and B section busbars are connected via an interconnecting circuit breaker; The two energy storage systems A and B respectively output 10kV AC power through their respective converters, and are connected to the 10kV energy storage A and B busbars through energy storage access circuit breakers; The 10kV energy storage A and B section busbars are responsible for transmitting the alternating current output by the energy storage system.

2. A method for interconnecting a segmented energy storage directly mounted generator set, using the segmented energy storage interconnected directly mounted generator set system as claimed in claim 1, characterized in that: include: The A and B distributed energy storage systems convert DC power into 10kV AC power through their respective converters and output it to the 10kV energy storage A section bus and the 10kV energy storage B section bus; The 10kV energy storage section A busbar and the 10kV energy storage section B busbar are connected through an interconnection circuit breaker. The AC power output from the 10kV energy storage section A and section B busbars is boosted to 20kV through the energy storage transformer and output to the outlets of the #1 generator and the #2 generator respectively, and runs in parallel with the generators. Control the charging and discharging status of the energy storage system according to frequency regulation requirements; Through the adaptive droop control method, the frequency droop coefficient and voltage droop coefficient of the energy storage system are adjusted in real time, and the charging and discharging state of the energy storage system is controlled according to the frequency fluctuation of the thermal power unit.

3. The method for interconnecting and directly hanging generator sets with segmented energy storage as claimed in claim 2, characterized in that: After the 10kV energy storage section A busbar and the 10kV energy storage section B busbar are connected through the interconnection circuit breaker, when the A set of energy storage is needed to assist the frequency modulation of the No. 2 generator set, the B set of distributed energy storage grid-connected switch is disconnected and the interconnection circuit breaker is closed; When the B set of energy storage is needed to assist the frequency regulation of the #1 generator set, the A set of distributed energy storage grid-connected switch is disconnected and the interconnecting circuit breaker is closed.

4. The method for interconnecting and directly hanging generator sets with segmented energy storage as claimed in claim 3, characterized in that: The controlling of the charging and discharging state of the energy storage system according to the frequency regulation demand includes: when the frequency of the thermal power unit drops to less than or equal to a threshold, the energy storage system discharges to replenish energy; when the frequency of the thermal power unit rises to exceed the threshold, the energy storage system charges to absorb energy.

5. The method for interconnecting and directly hanging generator sets with segmented energy storage as claimed in claim 4, characterized in that: The basic formula of the adaptive droop control method is expressed as, ， Where f is the actual output frequency of the energy storage system, is the reference frequency of the energy storage system, is the frequency droop coefficient, P is the actual output power of the energy storage system, is the reference output power of the energy storage system, V is the actual output voltage of the energy storage system, is the reference voltage of the energy storage system, is the voltage droop coefficient, Q is the actual output reactive power of the energy storage system, It is the reference reactive power of the energy storage system.

6. The method for interconnecting and directly hanging generator sets with segmented energy storage as claimed in claim 5, characterized in that: The adaptive expression of the frequency droop coefficient is: ， in, It is the basic value of the droop coefficient, which is usually determined according to the rated parameters and design requirements of the energy storage system. is the adjustment coefficient of the frequency deviation on the droop coefficient, is the absolute value of the frequency deviation of the energy storage system, It is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient. SOC is the energy storage system's state of charge, which indicates the remaining capacity of the energy storage system. It is the maximum frequency deviation allowed by the energy storage system and is used to normalize the frequency deviation to ensure that the droop coefficient varies within a reasonable range.

7. The method for interconnecting and directly hanging generator sets with segmented energy storage as claimed in claim 6, characterized in that: The adaptive expression of the voltage droop coefficient is: ， in, is the basic value of the voltage droop coefficient, is the adjustment coefficient of the voltage deviation on the droop coefficient, is the absolute value of the voltage deviation of the energy storage system, is the adjustment coefficient of the energy storage system's state of charge on the droop coefficient, is the rated voltage of the energy storage system, which is used to normalize the voltage deviation.

8. 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 for segmented energy storage interconnection and direct-connection of generator sets described in any one of claims 3 to 7 are implemented.

9. 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 segmented energy storage interconnection and direct-connection of generator sets described in any one of claims 3 to 7 are implemented.

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