Black start cooperative control system and method for thermal power plant based on energy storage system

Abstract

The present application relates to the technical field of black start control of thermal power plants, and provides a black start collaborative control system and method of thermal power plants based on energy storage systems, which comprises: a network-structured energy storage unit, which is used to autonomously build a millisecond-level island micro-grid under the condition that the power grid is completely stopped and no external power support is provided, simulates the external characteristics of a synchronous generator, and provides flexible power support required by auxiliary machines of the thermal power plant in the initial stage of start-up; and a thermal power plant unit collaborative controller, which is used to collect operating state parameters of the network-structured energy storage unit, generate and issue control instructions, and dynamically coordinate the centralized scheduling of the whole black start process. The present application significantly improves the response speed, system stability and whole-process automation level of the black start of the thermal power plant, effectively overcomes the defects of slow start, limited capacity, large switching disturbance and the like caused by traditional reliance on diesel engines or external power sources, greatly improves the black start success rate and the power grid resilience, and has outstanding technical advancement and engineering practical value.

Description

Technical Field

[0001] This invention relates to the field of black start control technology for thermal power plants, and particularly to a collaborative control system and method for black start control of thermal power plants based on an energy storage system. Background Technology

[0002] With the deepening of energy structure transformation and the construction of new power systems, society has put forward higher requirements for the safety, reliability and resilience of power supply. The frequent occurrence of extreme weather, the increase in natural disasters and the continuous improvement of power grid complexity have made the risk of large-scale power outages increasingly prominent. Against this background, thermal power plants, as the traditional main power source, still play a key role in the recovery process after the power grid collapse.

[0003] Currently, existing black start technologies for thermal power plants generally rely on diesel generators or external emergency power sources to provide initial plant power. This results in problems such as slow response speed, limited power supply capacity, and susceptibility to disturbances during the switching process. Especially in extreme scenarios without external power support, it is difficult to build a stable and reliable starting power environment within milliseconds, leading to low black start success rates and long cycles. The core of this deficiency lies in the lack of an integrated control system that can autonomously construct the grid, flexibly support, and coordinate the dynamic recovery of thermal power units throughout the entire process under conditions of a complete grid outage. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the prior art by providing a collaborative control system and method for black start of thermal power plants based on energy storage system, so as to solve the problem that the existing black start technology of thermal power plants is difficult to achieve rapid, stable and collaborative autonomous recovery of the entire process without external power support.

[0005] In one aspect, the present invention provides a black start collaborative control system for thermal power plants based on an energy storage system, the black start collaborative control system for thermal power plants based on an energy storage system includes a grid-type energy storage unit and a thermal power plant unit collaborative controller. The grid-type energy storage unit is used to autonomously construct an islanded microgrid in milliseconds under the condition of a complete grid outage and no external power support, simulating the external characteristics of a synchronous generator, and providing the flexible power support required for the initial startup of thermal power plant auxiliary equipment. The thermal power plant unit coordination controller is used to collect the operating status parameters of the grid-type energy storage unit, generate and issue control commands to centrally schedule and dynamically coordinate the entire black start process.

[0006] Optionally, the thermal power plant unit coordination controller includes an auxiliary machine start-up sequence management module and a power dynamic coordination control module; The auxiliary equipment start-up sequence management module is used to formulate a strategy for the activation of auxiliary equipment in thermal power plants based on the carrying capacity of the isolated microgrid, and to maintain the voltage frequency throughout the black start process. The power dynamic coordination control module is used to adjust the active power output and reactive power output of the grid-type energy storage unit based on the scheduling target in the control command issued by the thermal power plant unit coordination controller, to match the power gap during the load increase process of the thermal power unit, and maintain the power balance of the islanded microgrid.

[0007] Optionally, the thermal power plant unit coordinated controller further includes a seamless switching control module and a plant power restoration and grid connection preparation interface module; The seamless switching control module is used to reduce the power supply ratio of the grid-type energy storage unit and exit the main power supply circuit after the thermal power unit in the thermal power plant reaches the self-sustaining operation threshold, based on the operating status parameters of the grid-type energy storage unit. This completes the seamless switching of the main power supply from energy storage to thermal power. The plant power restoration and grid connection preparation interface module is used to maintain the power quality of the plant power system after the thermal power unit is under load, and at the same time generate synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

[0008] Optionally, the grid-type energy storage unit includes a self-sustaining auxiliary power supply system; The self-sustaining auxiliary power supply system includes an independently configured DC backup power supply, which provides the control power required for the startup and operation of the grid-type energy storage unit in the event of a complete power failure of the plant power system.

[0009] Optionally, the thermal power plant unit coordinated controller further includes a black start phase identification and control mode automatic evolution unit; The black start phase identification and control mode automatic evolution unit is used to automatically determine the current black start phase based on the operating status parameters of the grid-type energy storage unit, and dynamically start / stop or parameterize the auxiliary machine start sequence management module, the power dynamic coordination control module, the seamless switching control module, and the plant power restoration and grid connection preparation interface module accordingly. The black start phase identification and control mode automatic evolution unit is equipped with a phase transition condition verification mechanism. The phase transition condition verification mechanism is used to perform joint logical verification on the multi-dimensional state criteria based on the operating status parameters of the grid-type energy storage unit, the load demand of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit before the thermal power plant unit collaborative controller advances the black start phase control process from the current stage to the next stage. The load requirements for auxiliary equipment in thermal power plants include the power rating and startup impact characteristics of the auxiliary equipment that need to be known when formulating auxiliary equipment commissioning strategies.

[0010] Optionally, the joint logic verification includes: comparing the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the auxiliary equipment of the thermal power plant, and the operating condition information of the thermal power unit with the threshold conditions required for the corresponding black start stage transition, generating Boolean judgment results for each dimension, and combining and judging the Boolean judgment results of all dimensions based on preset logic operation rules. The logical operation rules include: for each black start stage, defining a set of transition access conditions composed of the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit. Only when the transition access condition set simultaneously meets the current access condition is the black start stage control process allowed to advance from the current stage to the next stage.

[0011] Optionally, the thermal power plant unit collaborative controller further includes a black start full-process state mirroring and backtracking module; The black start full-process state mirroring and backtracking module is used to record the collaborative control status of each stage of black start during the execution of black start, and automatically generate a state snapshot containing the complete operation sequence and response data within a preset time period before the failure when black start fails or is interrupted, so as to provide automatic retry and manual analysis for subsequent collaborative control of black start in thermal power plants.

[0012] Another aspect of the present invention provides a black-start collaborative control method for thermal power plants based on an energy storage system, applied to the aforementioned black-start collaborative control system for thermal power plants based on an energy storage system, wherein the black-start collaborative control method for thermal power plants based on an energy storage system includes: Using grid-type energy storage units, an islanded microgrid can be autonomously constructed in milliseconds under the condition of a complete grid outage and no external power support, simulating the external characteristics of a synchronous generator, and providing the flexible power support required for the initial startup of thermal power plant auxiliary equipment. By utilizing the thermal power plant unit collaborative controller, the operating status parameters of the grid-type energy storage unit are collected, control commands are generated and issued, and the entire black start process is centrally scheduled and dynamically coordinated. Based on the carrying capacity of isolated microgrids, a strategy for engaging auxiliary equipment in thermal power plants is formulated to maintain voltage frequency throughout the black start process. Based on the scheduling objectives in the control instructions issued by the thermal power plant unit coordinating controller, the active power output and reactive power output of the grid-type energy storage unit are adjusted to match the power gap during the load increase process of the thermal power unit and maintain the power balance of the islanded microgrid. After the thermal power units in the thermal power plant reach the self-sustaining operation threshold, the power supply ratio of the grid-type energy storage unit is reduced based on the operating status parameters of the grid-type energy storage unit, and the unit is removed from the main power supply circuit, thus completing the seamless switching of the main power supply from energy storage to thermal power. After the thermal power unit is under load, it maintains the power quality of the plant power system and generates synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

[0013] Another aspect of the present invention provides an electronic device comprising: At least one processor; and, A memory that is communicatively connected to at least one processor; wherein, The memory stores instructions that can be executed by at least one processor, which enables the at least one processor to execute the aforementioned black-start coordinated control method for thermal power plants based on energy storage systems.

[0014] In another aspect, the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned black-start coordinated control method for thermal power plants based on an energy storage system.

[0015] Compared to existing technologies, this invention achieves millisecond-level autonomous construction of a stable islanded microgrid under conditions of complete grid outage and no external power supply by deeply integrating a grid-based energy storage unit with a co-controller for thermal power plant units. It also simulates the external characteristics of a synchronous generator to provide flexible power support for auxiliary equipment. Simultaneously, based on a multi-module collaborative mechanism, it dynamically optimizes the auxiliary equipment startup sequence, precisely matches power supply and demand, and achieves seamless, disturbance-free switching between energy storage and thermal power. Furthermore, it provides a high-precision synchronization reference for plant power restoration and grid connection. This invention significantly improves the response speed, system stability, and automation level of black starts in thermal power plants, effectively overcoming the shortcomings of traditional methods that rely on diesel engines or external power sources, such as slow startup, limited capacity, and large switching disturbances. It greatly improves the success rate of black starts and grid resilience, demonstrating outstanding technological advancement and engineering practical value. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with the corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 A schematic diagram of a black start collaborative control system for thermal power plants based on an energy storage system is provided as an embodiment of the present invention. Figure 2 A flowchart of a black start collaborative control method for thermal power plants based on an energy storage system, provided as another embodiment of the present invention; Figure 3 A schematic diagram of the structure of an electronic device provided for another embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a computer-readable storage medium provided for another embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the various embodiments of the present invention to facilitate a better understanding of the invention. However, the technical solutions claimed in the present invention can be implemented even without these technical details and with various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined with and referenced by each other without contradiction.

[0019] One embodiment of the present invention provides a black start coordinated control system for thermal power plants based on an energy storage system, the structure of which is as follows: Figure 1 As shown, it includes a grid-type energy storage unit and a thermal power plant unit coordination controller.

[0020] Grid-based energy storage units are used to autonomously construct isolated microgrids within milliseconds under conditions of complete grid outage and no external power supply. They simulate the external characteristics of synchronous generators, providing flexible power support for auxiliary equipment in thermal power plants during the initial startup phase. An isolated microgrid refers to a millisecond-level stable power grid autonomously constructed using grid-based energy storage units.

[0021] The thermal power plant unit coordination controller is used to collect the operating status parameters of grid-type energy storage units, generate and issue control commands to centrally schedule and dynamically coordinate the entire black start process.

[0022] For example, combined Figure 1 The thermal power plant unit coordination controller includes an auxiliary machine start-up sequence management module and a power dynamic coordination control module.

[0023] The auxiliary equipment startup sequence management module is used to formulate auxiliary equipment activation strategies for thermal power plants based on the carrying capacity of the isolated microgrid, maintaining voltage frequency throughout the black start process. Specifically, at each stage of the black start process, the auxiliary equipment startup sequence management module can dynamically calculate the load margin that the isolated microgrid can carry, based on its real-time carrying capacity (i.e., the upper limit of load capacity that can be safely supported under the current power output and energy storage conditions), and generate a thermal power plant auxiliary equipment activation sequence accordingly, ensuring that the voltage frequency remains within the allowable range throughout the black start process.

[0024] The power dynamic coordination control module is used to adjust the active and reactive power output of the grid-type energy storage unit based on the scheduling targets in the control commands issued by the thermal power plant unit coordination controller, to match the power gap during the load increase process of the thermal power unit, and to maintain the power balance of the islanded microgrid.

[0025] A thermal power unit is a collection of physical equipment used for power generation in a thermal power plant; it is the physical unit of energy conversion. The operating data of a thermal power unit can be obtained by the thermal power plant unit co-controller through the automation system deployed on the thermal power unit, i.e., the thermal power unit control system.

[0026] For example, combined Figure 1 The thermal power plant unit coordination controller also includes a seamless switching control module and a plant power restoration and grid connection preparation interface module.

[0027] The seamless switching control module is used to reduce the power supply ratio of the grid-type energy storage unit and disconnect it from the main power supply circuit after the thermal power unit in the thermal power plant reaches the self-sustaining operation threshold, based on the operating status parameters of the grid-type energy storage unit. This completes the seamless switching of the main power supply from energy storage to thermal power.

[0028] The plant power restoration and grid connection preparation interface module is used to maintain the power quality of the plant power system after the thermal power unit is under load, and at the same time generate synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

[0029] For example, a grid-type energy storage unit includes a self-sustaining auxiliary power supply system.

[0030] The self-sustaining auxiliary power supply system includes an independently configured DC backup power supply, which provides the control power required for the startup and operation of the grid-type energy storage unit in the event of a complete power failure of the plant power system.

[0031] For example, the thermal power plant unit co-controller also includes a black start phase identification and control mode automatic evolution unit.

[0032] The Black Start Phase Identification and Control Mode Automatic Evolution Unit is used to automatically determine the current black start phase based on the operating status parameters of the grid-connected energy storage unit, and accordingly dynamically start / stop or parameterize the auxiliary equipment start-up sequence management module, power dynamic coordination control module, seamless switching control module, and plant power restoration and grid connection preparation interface module. For example, the Black Start Phase Identification and Control Mode Automatic Evolution Unit can determine the current black start phase of the grid-connected energy storage unit based on the preset correspondence between the operating status parameters of the grid-connected energy storage unit and each black start phase, and dynamically start / stop or parameterize the auxiliary equipment start-up sequence management module, power dynamic coordination control module, seamless switching control module, and plant power restoration and grid connection preparation interface module according to the actual needs of the current black start phase.

[0033] The black start phase identification and control mode automatic evolution unit is equipped with a phase transition condition verification mechanism. The phase transition condition verification mechanism is used to perform joint logical verification on the multi-dimensional state criteria based on the operating status parameters of the grid-type energy storage unit, the load demand of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit before the thermal power plant unit collaborative controller advances the black start phase control process from the current stage to the next stage.

[0034] Among them, the load requirements of auxiliary equipment in thermal power plants include the power level and start-up impact characteristics of the auxiliary equipment that need to be known when formulating the auxiliary equipment commissioning strategy.

[0035] For example, the joint logic verification includes: comparing the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the auxiliary equipment of the thermal power plant, and the operating condition information of the thermal power unit with the threshold conditions required for the corresponding black start stage transition, generating Boolean judgment results for each dimension, and combining and judging the Boolean judgment results of all dimensions based on preset logic operation rules.

[0036] The logical operation rules include: For each black start stage, a set of transition access conditions is defined, consisting of the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit. The black start stage control process is only allowed to advance from the current stage to the next stage when the transition access condition set simultaneously meets the current access conditions. In other words, the black start stage control process is only allowed to advance from the current stage to the next stage when the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit in the transition access condition set simultaneously meet their current access conditions, i.e., the quantized boundary conditions.

[0037] Preferably, the threshold conditions, or access conditions, required for the transition during the black start phase are a set of pre-defined quantitative boundary conditions based on the safe and stable operation requirements of each stage of black start in a thermal power plant. Specifically, these include: the voltage stability threshold of the grid-type energy storage unit, such as ±5% of the rated voltage, i.e., maintaining 361V–400V under a 380V system; the frequency deviation threshold of the grid-type energy storage unit, such as 49.5 Hz–50.5Hz; and the state of charge (SOC) of the grid-type energy storage unit. The lower limit threshold for the State of Charge (SOC) is set to no less than 20% to ensure continuous support capacity. The power level threshold for auxiliary equipment in thermal power plants is divided according to equipment type. For example, the power level threshold for induced draft fans can be set to 2MW–5MW, the power level threshold for feedwater pumps can be set to 3MW–8MW, and the power level threshold for circulating water pumps can be set to 1MW–3MW. The starting inrush current multiple threshold for auxiliary equipment in thermal power plants is usually set to 4 to 7 times the rated current and the duration does not exceed 2 seconds. The operating condition information threshold for thermal power units includes self-sustaining operation criteria such as boiler steam pressure greater than or equal to 3MPa, turbine speed greater than or equal to 2850rpm, and generator outlet voltage greater than or equal to 90% of the rated value. Only when the measured data of all dimensions—namely, the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit—simultaneously meet the threshold conditions of the corresponding stage, i.e., when the Boolean judgment results of the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit are all "true," will the overall verification result generated by the joint logic verification be "true," allowing the black start stage control process to enter the next stage, thereby ensuring the safety and controllability of the entire black start process.

[0038] For example, the thermal power plant unit co-controller also includes a black start full-process state mirroring and backtracking module.

[0039] The black start full-process status mirroring and backtracking module is used to record the coordinated control status of each stage of black start during black start execution. When black start fails or is interrupted, it automatically generates a status snapshot containing the complete operation sequence and response data within a preset time period before the failure, so that subsequent black start coordinated control of thermal power plants can be automatically retried and manually analyzed.

[0040] The black-start collaborative control system for thermal power plants based on energy storage systems provided in this embodiment constructs a system architecture with grid-type energy storage units and thermal power plant unit collaborative controllers as the core. The grid-type energy storage units, with their self-sustaining auxiliary power supply systems, can autonomously establish stable isolated microgrids within milliseconds when the grid is completely shut down and there is no external power source. This simulates the external characteristics of synchronous generators, providing flexible power support and solving the problem of traditional solutions being unable to quickly construct reliable start-up power sources. The four functional modules—auxiliary generator start-up sequence management module, power dynamic coordination control module, seamless switching control module, and plant power restoration and grid connection preparation interface module—are centrally scheduled and coordinated. Under this mechanism, the auxiliary equipment startup sequence management module systematically engages auxiliary equipment in the thermal power plant based on the microgrid's carrying capacity. The power dynamic coordination control module matches the power gap during the load increase process of the thermal power unit in real time. The seamless switching control module enables a smooth and uninterrupted switch from energy storage to thermal power as the main power supply source. The plant power restoration and grid connection preparation interface module provides a precise synchronization benchmark for subsequent grid connection. Furthermore, the introduced black start stage identification and control mode automatic evolution unit ensures the safe and orderly evolution of each stage of black start through multi-dimensional state criteria joint verification and logical access mechanisms. The black start full-process state mirroring and backtracking module ensures the traceability and fault-tolerant retry capabilities of the black start process. This implementation method provides a closed-loop, intelligent, and adaptive integrated control system for thermal power plants based on an energy storage system. It fundamentally overcomes the shortcomings of existing technologies, such as reliance on external emergency power sources, slow response, limited capacity, large switching disturbances, and lack of full-process coordination. It achieves rapid, stable, and fully automatic black start recovery capabilities for thermal power plants under extreme power outage conditions.

[0041] Another aspect of the present invention provides a black-start collaborative control method for thermal power plants based on an energy storage system, applied to the black-start collaborative control system for thermal power plants based on an energy storage system described in the above embodiments. The flow of the black-start collaborative control method for thermal power plants based on an energy storage system is as follows: Figure 2 As shown, it includes the following steps S1 to S6.

[0042] Step S1: Using grid-type energy storage units, an islanded microgrid is autonomously constructed in milliseconds under the condition of a complete grid outage and no external power supply support, simulating the external characteristics of a synchronous generator, and providing the flexible power support required for the initial startup of auxiliary equipment in thermal power plants.

[0043] Step S2: Using the thermal power plant unit collaborative controller, collect the operating status parameters of the grid-type energy storage unit, generate and issue control commands, and centrally schedule and dynamically coordinate the entire black start process.

[0044] Step S3: Based on the carrying capacity of the islanded microgrid, formulate a strategy for the commissioning of auxiliary equipment in thermal power plants to maintain the voltage frequency throughout the black start process.

[0045] Step S4: Based on the scheduling objectives in the control instructions issued by the thermal power plant unit coordinating controller, adjust the active power output and reactive power output of the grid-type energy storage unit to match the power gap during the load increase process of the thermal power unit and maintain the power balance of the islanded microgrid.

[0046] Step S5: After the thermal power units in the thermal power plant reach the self-sustaining operation threshold, the power supply ratio of the grid-type energy storage unit is reduced based on the operating status parameters of the grid-type energy storage unit, and the unit is removed from the main power supply circuit, thus completing the seamless switching of the main power supply from energy storage to thermal power.

[0047] Step S6: After the thermal power unit is under load, maintain the power quality of the plant power system and generate synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

[0048] Compared to existing technologies, this invention achieves millisecond-level autonomous construction of a stable islanded microgrid under conditions of complete grid outage and no external power supply by deeply integrating a grid-based energy storage unit with a thermal power plant unit co-controller. It also simulates the external characteristics of a synchronous generator to provide flexible power support for auxiliary equipment. Simultaneously, based on a centralized scheduling and dynamic coordination mechanism, it can dynamically optimize the auxiliary equipment startup sequence, accurately match power supply and demand, and achieve seamless, disturbance-free switching between energy storage and thermal power. Furthermore, it provides a high-precision synchronization benchmark for plant power restoration and grid connection. This invention significantly improves the response speed, system stability, and automation level of thermal power plant black starts, effectively overcoming the shortcomings of traditional methods that rely on diesel engines or external power sources, such as slow startup, limited capacity, and large switching disturbances. It greatly improves the success rate of black starts and grid resilience, demonstrating outstanding technological advancement and engineering practical value.

[0049] like Figure 3 As shown, another embodiment of the present invention relates to an electronic device 40, comprising: At least one processor 401; and a memory 402 communicatively connected to at least one processor 401; wherein the memory 402 stores instructions executable by at least one processor 401, the instructions being executed by at least one processor 401 to enable at least one processor 401 to execute the black start coordinated control method for thermal power plants based on energy storage systems described in the above embodiments.

[0050] The processor 401 can be a processing unit. The memory 402 and the processor 401 are communicatively connected via a bus 403. The bus 403 can include any number of interconnected buses and bridges, connecting various circuits of one or more processors 401 and memory 402 together. The bus 403 can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor is transmitted over a wireless medium via an antenna, which further receives data and transmits it to the processor.

[0051] Processor 401 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 402 can be used to store data used by processor 401 during operation.

[0052] System memory 402 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 4021 and / or cache memory 4022. Electronic device 40 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, electronic device 40 may include read-only memory (ROM) 4023, which can be used to read and write non-removable, non-volatile magnetic media (…). Figure 3 (Not shown in the image, usually referred to as "hard drive"). Although not shown in... Figure 3 The diagram shows that a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) can be provided. In these cases, each drive can be connected to bus 403 via one or more data media interfaces. Memory 402 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of various embodiments of the present invention.

[0053] A program / utility 4025 having a set (at least one) of program modules 4024 may be stored, for example, in memory 402, and such program modules 4024 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment. Program modules 4024 typically perform the functions and / or methods described in the embodiments of this invention.

[0054] Electronic device 40 can also communicate with one or more external devices 404 (such as a keyboard, pointing device, display, etc.). This communication can be performed via input / output (I / O) interface 405. Furthermore, electronic device 40 can also communicate with one or more networks, such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet, via network adapter 406. Figure 3 As shown, network adapter 406 communicates with other modules of electronic device 40 (such as processing unit 401) via bus 403. It should be understood that, although... Figure 3 As not shown, it can be combined with other hardware and / or software modules in conjunction with electronic device 40.

[0055] The processing unit 401 executes various functional applications and data processing by running programs stored in memory 402. For example, it executes the functions of grid-type energy storage units and thermal power plant unit collaborative controllers in the thermal power plant black start collaborative control system based on energy storage system. It also executes the functions of various modules in the thermal power plant unit collaborative controller, such as auxiliary machine start sequence management module, power dynamic coordination control module, seamless switching control module, and plant power restoration and grid connection preparation interface module.

[0056] Another embodiment of the present invention relates to a computer-readable storage medium storing a computer program that, when executed by a processor, implements the black-start coordinated control method for thermal power plants based on energy storage systems described in the above embodiments.

[0057] That is, those skilled in the art will understand that all or part of the steps in the methods described in the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium can be any available medium accessible to electronic devices, including volatile and non-volatile media, removable media, and non-removable media. Specifically, it can include various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0058] For example, such as Figure 4 As shown, the computer-readable storage medium can be an optical disc 30, on which a computer program, i.e. a program product, is stored. When the program product is executed by the processor, it implements the black start collaborative control method for thermal power plants based on energy storage systems described in the above embodiments.

[0059] It should be understood that the systems, apparatuses, and methods disclosed in the above embodiments can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, and the indirect coupling or communication connection of apparatuses or units may be electrical, mechanical, or other forms.

[0060] The units described as separate components may or may not be physically separate. 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 the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0061] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0062] If the functionality is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0063] Those skilled in the art will understand that the above embodiments are specific implementations of the present invention, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A black-start collaborative control system for thermal power plants based on an energy storage system, characterized in that, The black start collaborative control system for thermal power plants based on energy storage systems includes a grid-type energy storage unit and a collaborative controller for thermal power plant units. The grid-type energy storage unit is used to autonomously construct an islanded microgrid in milliseconds under the condition of a complete grid outage and no external power support, simulating the external characteristics of a synchronous generator, and providing the flexible power support required for the initial startup of thermal power plant auxiliary equipment. The thermal power plant unit coordination controller is used to collect the operating status parameters of the grid-type energy storage unit, generate and issue control commands to centrally schedule and dynamically coordinate the entire black start process.

2. The thermal power plant black start collaborative control system based on energy storage system according to claim 1, characterized in that, The thermal power plant unit collaborative controller includes an auxiliary machine start-up sequence management module and a power dynamic coordination control module. The auxiliary equipment start-up sequence management module is used to formulate a strategy for the activation of auxiliary equipment in thermal power plants based on the carrying capacity of the isolated microgrid, and to maintain the voltage frequency throughout the black start process. The power dynamic coordination control module is used to adjust the active power output and reactive power output of the grid-type energy storage unit based on the scheduling target in the control command issued by the thermal power plant unit coordination controller, to match the power gap during the load increase process of the thermal power unit, and maintain the power balance of the islanded microgrid.

3. The thermal power plant black start collaborative control system based on energy storage system according to claim 2, characterized in that, The thermal power plant unit collaborative controller also includes a seamless switching control module and a plant power restoration and grid connection preparation interface module. The seamless switching control module is used to reduce the power supply ratio of the grid-type energy storage unit and exit the main power supply circuit after the thermal power unit in the thermal power plant reaches the self-sustaining operation threshold, based on the operating status parameters of the grid-type energy storage unit. This completes the seamless switching of the main power supply from energy storage to thermal power. The plant power restoration and grid connection preparation interface module is used to maintain the power quality of the plant power system after the thermal power unit is under load, and at the same time generate synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

4. The thermal power plant black start collaborative control system based on energy storage system according to claim 3, characterized in that, The grid-type energy storage unit includes a self-sustaining auxiliary power supply system; The self-sustaining auxiliary power supply system includes an independently configured DC backup power supply, which provides the control power required for the startup and operation of the grid-type energy storage unit in the event of a complete power failure of the plant power system.

5. The thermal power plant black start collaborative control system based on energy storage system according to claim 4, characterized in that, The thermal power plant unit collaborative controller also includes a black start phase identification and control mode automatic evolution unit. The black start phase identification and control mode automatic evolution unit is used to automatically determine the current black start phase based on the operating status parameters of the grid-type energy storage unit, and dynamically start / stop or parameterize the auxiliary machine start sequence management module, the power dynamic coordination control module, the seamless switching control module, and the plant power restoration and grid connection preparation interface module accordingly. The black start phase identification and control mode automatic evolution unit is equipped with a phase transition condition verification mechanism. The phase transition condition verification mechanism is used to perform joint logical verification on the multi-dimensional state criteria based on the operating status parameters of the grid-type energy storage unit, the load demand of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit before the thermal power plant unit collaborative controller advances the black start phase control process from the current stage to the next stage. The load requirements for auxiliary equipment in thermal power plants include the power rating and startup impact characteristics of the auxiliary equipment that need to be known when formulating auxiliary equipment commissioning strategies.

6. The black-start coordinated control system for thermal power plants based on energy storage systems according to claim 5, characterized in that, The joint logic verification includes: comparing the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the auxiliary equipment of the thermal power plant, and the operating condition information of the thermal power unit with the threshold conditions required for the corresponding black start stage transition, generating Boolean judgment results for each dimension, and combining and judging the Boolean judgment results of all dimensions based on preset logic operation rules. The logical operation rules include: for each black start stage, defining a set of transition access conditions composed of the operating status parameters of the grid-type energy storage unit, the power level and start-up impact characteristics of the thermal power plant auxiliary equipment, and the operating condition information of the thermal power unit. Only when the transition access condition set simultaneously meets the current access condition is the black start stage control process allowed to advance from the current stage to the next stage.

7. The black-start collaborative control system for thermal power plants based on an energy storage system according to claim 6, characterized in that, The thermal power plant unit collaborative controller also includes a black start full-process status mirroring and backtracking module. The black start full-process state mirroring and backtracking module is used to record the collaborative control status of each stage of black start during the execution of black start, and automatically generate a state snapshot containing the complete operation sequence and response data within a preset time period before the failure when black start fails or is interrupted, so as to provide automatic retry and manual analysis for subsequent collaborative control of black start in thermal power plants.

8. A collaborative control method for black start of thermal power plants based on energy storage systems, characterized in that, The black-start collaborative control system for thermal power plants based on energy storage systems, as described in any one of claims 1 to 7, comprises: Using grid-type energy storage units, an islanded microgrid can be autonomously constructed in milliseconds under the condition of a complete grid outage and no external power support, simulating the external characteristics of a synchronous generator, and providing the flexible power support required for the initial startup of thermal power plant auxiliary equipment. By utilizing the thermal power plant unit collaborative controller, the operating status parameters of the grid-type energy storage unit are collected, control commands are generated and issued, and the entire black start process is centrally scheduled and dynamically coordinated. Based on the carrying capacity of isolated microgrids, a strategy for engaging auxiliary equipment in thermal power plants is formulated to maintain voltage frequency throughout the black start process. Based on the scheduling objectives in the control instructions issued by the thermal power plant unit coordinating controller, the active power output and reactive power output of the grid-type energy storage unit are adjusted to match the power gap during the load increase process of the thermal power unit and maintain the power balance of the islanded microgrid. After the thermal power units in the thermal power plant reach the self-sustaining operation threshold, the power supply ratio of the grid-type energy storage unit is reduced based on the operating status parameters of the grid-type energy storage unit, and the unit is removed from the main power supply circuit, thus completing the seamless switching of the main power supply from energy storage to thermal power. After the thermal power unit is under load, it maintains the power quality of the plant power system and generates synchronous phase, frequency and voltage reference signals to provide control reference and operating conditions for connecting to the external main grid.

9. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, which, when executed by the at least one processor, enables the at least one processor to perform the black start collaborative control method for thermal power plants based on energy storage systems as described in claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the black start collaborative control method for thermal power plants based on energy storage systems as described in claim 8.

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