Power control method and system for integrated energy system

Abstract

The application discloses a power control method and system of a comprehensive energy system, and belongs to the technical field of comprehensive energy systems. The method comprises the following steps: in response to a power adjustment instruction, obtaining a fault measure quantity; determining an energy storage adjustment strategy based on the type of the fault; the energy storage adjustment strategy comprises energy storage up-regulation and / or energy storage down-regulation; based on the fault measure quantity, the energy storage adjustment strategy, a first power parameter of the energy storage device at present, and a second power parameter of the device to be cut off at present, determining a power adjustment quantity of the energy storage device and a target cut-off device, the target cut-off device comprising at least one of a power supply device and a power consumption device; cutting off the target cut-off device, and adjusting the charging and discharging power of the energy storage device based on the power adjustment quantity and the energy storage adjustment strategy. The application adjusts the power of the comprehensive energy system by combining the power adjustment quantity, the energy storage adjustment strategy and the target cut-off device, maintains the balance of the power, and improves the stability and safety of the comprehensive energy system.

Description

Technical Field

[0001] This application belongs to the field of integrated energy system technology, specifically relating to a power control method and system for an integrated energy system. Background Technology

[0002] As an organic whole, a fault in an integrated energy system disrupts the power balance among its power sources, grid, loads, and energy storage devices, affecting its continued safe and stable operation. To address this, the common approach is "high-frequency generator shedding and low-frequency load shedding," attempting to balance the integrated energy system's power by reducing generation capacity or electricity demand. Generator shedding refers to disconnecting wind and solar power collectors to cut off the generators in the power supply, while load shedding refers to disconnecting load lines to eliminate the electrical load.

[0003] However, since wind power collectors, photovoltaic collectors, and load lines are discrete, simply cutting off the generator or load is insufficient to effectively guarantee the power balance of the integrated energy system. Summary of the Invention

[0004] This application provides a power control method for an integrated energy system to solve the problem that simply cutting off the generator or load is insufficient to ensure the power balance of the integrated energy system when a fault occurs; this application also provides a power control system for an integrated energy system.

[0005] Technical solution: This application provides a power control method for an integrated energy system, including:

[0006] In response to a power adjustment command, a fault measure quantity is obtained; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs.

[0007] The energy storage regulation strategy is determined based on the type of the fault; the energy storage regulation strategy includes energy storage up-regulation and / or energy storage down-regulation.

[0008] Based on the fault mitigation measures, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, the power regulation amount of the energy storage device and the target disconnected device are determined. The target disconnected device includes at least one of the power supply device and the power consumption device. The first power parameter includes the maximum discharge power, the maximum charging power, and the current power of the energy storage device.

[0009] The target removal device is removed, and the charging and discharging power of the energy storage device is adjusted based on the power adjustment amount and the energy storage adjustment strategy.

[0010] In some embodiments, determining the power regulation amount of the energy storage device and the target device to be disconnected based on the fault measure amount, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected includes:

[0011] The adjustable power range of the energy storage device is determined based on the energy storage regulation strategy and the first power parameter.

[0012] Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, a plurality of combinations to be switched are determined, wherein the power supply device is configured to include a plurality of wind power collector lines and a plurality of photovoltaic collector lines, and the electrical device is configured to include a plurality of load lines;

[0013] Based on the steady-state power of the combination to be cut and the fault mitigation measures, a power cut-off reference value is determined; the steady-state power is the power of the combination to be cut at a preset time point before the fault.

[0014] Based on the power adjustable range and the power cut-off reference value, the target cut-off device and the power adjustment amount are determined.

[0015] In some embodiments, determining the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter includes:

[0016] In response to the energy storage regulation strategy of reducing energy storage, the minimum value of the power adjustable range is determined based on the maximum discharge power and the current power, and the maximum value of the power adjustable range is determined based on the maximum charging power and the current power.

[0017] In some embodiments, determining the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter further includes:

[0018] In response to the energy storage regulation strategy of increasing energy storage, the minimum value of the power adjustable range is determined based on the maximum charging power and the current power, and the maximum value of the power adjustable range is determined based on the maximum discharging power and the current power.

[0019] In some embodiments, based on the power adjustable range, the second power parameter of each power supply device and each power consumption device, a plurality of combinations to be switched are determined, including:

[0020] In response to the energy storage regulation strategy for energy storage downgrade, a plurality of first combinations are determined based on at least one of the plurality of wind power collectors and the plurality of photovoltaic collectors, and a first steady-state power of each first combination;

[0021] Multiple first combinations are collectively identified as the combination to be cut.

[0022] In some embodiments, determining multiple combinations to be switched based on the power adjustable range, the second power parameter of each power supply device and each power consumption device further includes:

[0023] A second combination is determined based on at least one of the plurality of first combinations and at least one of the plurality of load lines, and a second steady-state power for each of the second combinations;

[0024] Multiple first combinations and multiple second combinations are collectively determined as the combination to be cut.

[0025] In some embodiments, determining multiple combinations to be switched based on the power adjustable range, the second power parameter of each power supply device and each power consumption device further includes:

[0026] In response to the energy storage regulation strategy for energy storage up-adjustment, a plurality of first combinations are determined based on at least one of the plurality of load lines, and a first steady-state power for each of the first combinations;

[0027] Multiple first combinations are collectively identified as the combination to be cut.

[0028] In some embodiments, determining multiple combinations to be switched based on the power adjustable range, the second power parameter of each power supply device and each power consumption device further includes:

[0029] A second combination is determined based on at least one of the multiple first combinations, at least one of the multiple wind power collectors and at least one of the multiple photovoltaic collectors, and a second steady-state power of each second combination;

[0030] Multiple first combinations and multiple second combinations are collectively determined as the combination to be cut.

[0031] In some embodiments, determining a power cut-off reference value based on the steady-state power of the combination to be cut and the fault mitigation amount includes:

[0032] Based on the fault measure quantity and the first steady-state power, obtain a first reference value for each of the first combinations;

[0033] Based on the fault measure quantity, the first steady-state power, and the second steady-state power, a second reference value is obtained for each of the second combinations.

[0034] In some embodiments, determining the target cut-off device and the power adjustment amount based on the power adjustable range and the power cut-off reference value includes:

[0035] Filter all the first reference values ​​within the power adjustable range;

[0036] Among the first combinations corresponding to the first reference value selected, the first combination with the smallest first steady-state power is determined as the target removal device;

[0037] The first reference value of the target removal device is determined as the power adjustment amount.

[0038] In some embodiments, determining the target cut-off device and the power adjustment amount based on the power adjustable range and the power cut-off reference value further includes:

[0039] In response to the failure to find the first reference value within the power adjustable range, all second reference values ​​within the power adjustable range are filtered.

[0040] Among the second combinations corresponding to the selected second reference values, the second combination with the smallest sum of the first steady-state power and the second steady-state power is determined as the target removal device;

[0041] The second reference value of the target removal device is determined as the power adjustment amount.

[0042] In some embodiments, determining the target cut-off device and the power adjustment amount based on the power adjustable range and the power cut-off reference value further includes:

[0043] In response to the failure to filter out the first reference value and the second reference value within the power adjustable range, a third reference value of the second combination is obtained; the third reference value is configured as the over / under power or undercut power of the second combination after energy storage regulation;

[0044] Filter all of the third reference values ​​within the power adjustable range;

[0045] Among the second combinations corresponding to the selected third reference value, the second combination with the smallest third reference value is determined as the target resection device;

[0046] Based on the second reference value of the target removal device, the maximum or minimum value of the power adjustable range is determined as the power adjustment amount.

[0047] In some embodiments, the third reference value is obtained based on the fault measure amount, the first steady-state power, the second steady-state power, and the power adjustable range.

[0048] Accordingly, embodiments of this application also provide a power control system for an integrated energy system, used to execute the power control method for an integrated energy system as described in any of the above claims, the power control system comprising:

[0049] The fault measure quantity acquisition module is configured to acquire fault measure quantity in response to a power adjustment command; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs.

[0050] An energy storage regulation strategy determination module is configured to determine an energy storage regulation strategy based on the type of the fault; the energy storage regulation strategy includes energy storage up-regulation and / or energy storage down-regulation.

[0051] The power regulation amount and cut-off target determination module is configured to determine the power regulation amount of the energy storage device and the target cut-off device based on the fault measure amount, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be cut off. The target cut-off device includes at least one of the power supply device and the power consumption device. The first power parameter includes the maximum discharge power, the maximum charging power, and the current power of the energy storage device.

[0052] The processing module is configured to disconnect the target disconnect device and adjust the charging and discharging power of the energy storage device based on the power adjustment amount and the energy storage adjustment strategy.

[0053] Beneficial Effects: Compared with the prior art, the power control method for an integrated energy system provided in this application includes: responding to a power adjustment command to obtain a fault measure quantity; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs; determining an energy storage regulation strategy based on the type of fault; the energy storage regulation strategy includes energy storage up-adjustment and / or energy storage down-adjustment; determining a power adjustment amount for the energy storage device and a target device to be disconnected based on the fault measure quantity, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, wherein the target device to be disconnected includes at least one of a power supply device and an electrical device; the first power parameter includes the maximum discharge power, the maximum charging power, and the current power of the energy storage device; disconnecting the target device to be disconnected; and adjusting the charging and discharging power of the energy storage device based on the power adjustment amount and the energy storage regulation strategy. Thus, this application combines the power adjustment amount, the energy storage regulation strategy, and the target device to jointly regulate the power of the integrated energy system after a fault, maintaining power balance and improving the stability and security of the integrated energy system.

[0054] It is understood that, compared with the prior art, the power control system for an integrated energy system provided in this application includes all the technical features and effects of the power control method for the integrated energy system described above, and will not be repeated here. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 A first flowchart illustrating the power control method for an integrated energy system provided in an embodiment of this application;

[0057] Figure 2 A second flowchart illustrating the power control method for an integrated energy system provided in an embodiment of this application;

[0058] Figure 3 A schematic diagram of the third process of the power control method for an integrated energy system provided in an embodiment of this application;

[0059] Figure 4 This is a schematic diagram of the power control system of the integrated energy system provided in the embodiments of this application. Detailed Implementation

[0060] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0061] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. In the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0062] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments and may not be to scale. The modules or processes shown in the drawings are not necessarily essential for implementing this application and therefore should not be used to limit the scope of protection of this application.

[0063] An integrated energy system refers to a highly efficient, economical, and sustainable energy system that organically integrates four aspects: power generation (source), power transmission network (grid), power consumption (load), and power storage (storage). This energy system can connect to the main power grid for real-time power exchange, and can also operate independently off-grid, enhancing the flexibility and reliability of the power system and promoting the large-scale integration and local consumption of electricity generated by renewable energy power generation equipment. When an integrated energy system is subjected to sudden interference events leading to unstable or insufficient power supply, related technologies often employ generator shedding (i.e., adjusting the output power of wind and photovoltaic power generation in power generation) or load shedding (i.e., adjusting the electricity load in power consumption) to maintain system power balance and stability. However, because the collector lines and load lines of renewable energy power generation equipment such as wind power collectors and photovoltaic collectors in an integrated energy system are discrete, simply disconnecting the collector lines or load lines of renewable energy power generation equipment often fails to achieve timely system power balance.

[0064] When a fault occurs in the integrated energy system, such as a tripping of the interconnection line with the main grid or a tripping of power lines or load lines within the off-grid system, emergency control is required to distribute power and maintain the power balance and stability of the integrated energy system. Emergency control demands high timeliness, needing to be executed within tens to hundreds of milliseconds. However, the power regulation rate of the integrated energy system's power sources (such as wind power and photovoltaic power generation equipment) is difficult to meet the requirements of emergency control. Therefore, on the one hand, power generation and / or consumption can be controlled by directly disconnecting wind power collectors, photovoltaic collectors, and load lines. On the other hand, based on the rapid response characteristics of energy storage devices, a "regulation-based switching" control method can be adopted for energy storage devices to minimize line disconnection losses.

[0065] In view of this, embodiments of this application provide a power control method for an integrated energy system, which combines an energy storage regulation strategy and a target cut-off device to jointly regulate the power of the integrated energy system after a fault, so as to solve at least part of the above-mentioned technical problems.

[0066] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 A first flowchart illustrating the power control method for an integrated energy system provided in an embodiment of this application; Figure 2 A second flowchart illustrating the power control method for an integrated energy system provided in an embodiment of this application; Figure 3 This is a schematic diagram of the third process of the power control method for an integrated energy system provided in an embodiment of this application.

[0067] This application provides a power control method for an integrated energy system, used to redistribute the power of the integrated energy system after a failure occurs. The power control method includes the following steps 10 to 40.

[0068] Step 10: In response to the power adjustment command, obtain the fault response quantity; the fault response quantity is the absolute power value of the integrated energy system before the fault occurs, denoted as P. 措施量 Specifically, after a fault occurs in the integrated energy system, a power adjustment command to restore the fault will be issued. The power control method of this application needs to respond to and execute this fault adjustment command. The fault measure quantity is the power value that needs to be adjusted after the integrated energy system fails. That is, after an emergency fault occurs in the integrated energy system, the power deficit or power surplus of the integrated energy system can be obtained through sensors and other devices built into the integrated energy system, so as to provide clear targets and basis for subsequent power adjustment steps.

[0069] Step 20: Determine the energy storage regulation strategy based on the type of fault. The energy storage regulation strategy includes increasing and / or decreasing energy storage. Specifically, the types of faults occurring in the integrated energy system can be divided into two categories. The first category includes PCC (Point of Common Coupling) interconnection line disconnection, off-grid load line tripping, and off-grid energy storage collector line tripping during charging. The second category includes PCC interconnection line disconnection, off-grid wind and solar collector line tripping, and off-grid energy storage collector line tripping during discharge. The common characteristics of the first category of faults are load loss in the integrated energy system, power supply exceeding load power, and increased integrated energy system frequency. Therefore, it is necessary to decrease energy storage and disconnect wind or solar collector lines. Thus, the energy storage regulation strategy determined for the first category of faults is decreasing energy storage. The common characteristics of the second category of faults are power loss in the integrated energy system, power supply less than load power, and decreased integrated energy system frequency. Therefore, it is necessary to increase energy storage and disconnect load. Thus, the energy storage regulation strategy determined for the second category of faults is increasing energy storage. It should be noted that this application uses either an upward adjustment or a downward adjustment of energy storage as the benchmark, which is equivalent to defining a positive direction for power regulation. When the upward adjustment of energy storage is used as the benchmark, the upward adjustment is the positive direction. In this case, if the power regulation amount is positive, it means that the energy storage device is actually adjusting its energy storage upward; if the power regulation amount is negative, it means that the energy storage device is actually adjusting its energy storage downward. When the downward adjustment of energy storage is used as the benchmark, the downward adjustment is the positive direction. In this case, if the power regulation amount is positive, it means that the energy storage device is actually adjusting its energy storage downward; if the power regulation amount is negative, it means that the energy storage device is actually adjusting its energy storage upward. It should be noted that the final adjustment result of the energy storage regulation strategy in this application may be an upward adjustment, a downward adjustment, or no adjustment of energy storage, depending on the specific circumstances of the subsequent cut-off of the target. In this way, by determining the energy storage regulation strategy based on the fault type, the energy storage equipment can quickly make targeted responses when a fault occurs. For example, it can quickly increase the energy storage output when there is a power deficit fault, or promptly reduce the energy storage absorption power when there is a power surplus fault. This effectively suppresses the frequency and voltage fluctuations of the integrated energy system, enhances the integrated energy system's ability to cope with sudden faults, and maintains the stable operation of the integrated energy system.

[0070] Step 30: Based on the fault mitigation measures, energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, determine the power regulation amount of the energy storage device and the target disconnected device. The target disconnected device includes at least one of the power supply equipment and the power consumption equipment. The first power parameter includes the maximum discharge power, maximum charging power, and current power of the energy storage device. In this embodiment, "current" refers to the moment before the fault occurred; that is, the first power parameter is the power parameter of the energy storage device at the moment before the fault occurred, the second power parameter is the power parameter of the device to be disconnected at the moment before the fault occurred, and the current power is the power of the energy storage device at the moment before the fault occurred. This application combines the power regulation amount, energy storage regulation strategy, and disconnection target to jointly regulate the power of the integrated energy system after a fault. That is, while disconnecting the disconnection target, this application also adjusts or lowers the power of the energy storage device according to the energy storage regulation strategy and the power regulation amount. Furthermore, the disconnection target of this application needs to be determined based on the fault mitigation measures, energy storage regulation strategy, and power parameters of the energy storage device to avoid the impact of a single disconnection on the operational stability of the integrated energy system. Thus, this application improves the reliability and flexibility of power regulation after a fault, enhances the ability of the integrated energy system to cope with faults, and at the same time controls economic operating costs and reduces losses caused by faults.

[0071] In some embodiments, step 30 determines the power regulation amount of the energy storage device and the target device to be disconnected based on the fault measure amount, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, including steps 31 to 34.

[0072] Step 31: Determine the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter. This application clarifies the adjustable power range of the energy storage device under different conditions, enabling more precise power regulation of the energy storage device after a fault.

[0073] In some embodiments, step 31, determining the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter, includes: in response to the energy storage regulation strategy being energy storage down, determining the minimum value of the adjustable power range based on the maximum discharge power and the current power, and determining the maximum value of the adjustable power range based on the maximum charging power and the current power. Specifically, when the energy storage regulation strategy is energy storage down, it means controlling the energy storage device to reduce power output or even charge to absorb excess power. At this time, determining the minimum value of the adjustable power range based on the maximum discharge power and the current power can effectively prevent the energy storage device from over-discharging, avoiding damage to the hardware components and performance of the energy storage device. Similarly, determining the maximum value of the adjustable power range based on the maximum charging power and the current power can effectively prevent the energy storage device from overcharging, avoiding overheating or bulging of the energy storage device, and improving the safety of power regulation of the energy storage device.

[0074] In some embodiments, in response to the energy storage regulation strategy being to reduce energy storage, the minimum and maximum values ​​of the power adjustable range can be obtained according to the following formula (1):

[0075]

[0076] Among them, P a For the minimum value, P b For the maximum value, P 放电max P represents the maximum discharge power of the energy storage device in the integrated energy system. 充电max P is the maximum charging power of the energy storage device. 实时 This represents the current power of the energy storage device. For example, the maximum charging power P of the energy storage device. 充电max It is 10MW, with a maximum discharge power P 放电max The current power P of the energy storage device is 10MW. 实时 If the value is -4MW, then the energy storage device can be adjusted down to 6.0MW and up to 14.0MW. The adjustable power range based on the downward adjustment of energy storage is denoted as (-14.0, 6.0).

[0077] In some embodiments, step 31, which determines the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter, further includes: in response to the energy storage regulation strategy being an increase in energy storage, determining the minimum value of the adjustable power range based on the maximum charging power and the current power, and determining the maximum value of the adjustable power range based on the maximum discharging power and the current power. Specifically, when the energy storage regulation strategy is an increase in energy storage, it means that the energy storage device needs to be controlled to increase its power output. At this time, determining the minimum value of the adjustable power range based on the maximum charging power and the current power can effectively prevent the energy storage device from overcharging when preparing to increase its power output. Overcharging of the energy storage device can damage battery performance and shorten its lifespan. Similarly, determining the maximum value of the adjustable power range based on the maximum discharging power and the current power can prevent the energy storage device from over-discharging when increasing its power output, thus improving the safety of the energy storage device's power regulation.

[0078] In some embodiments, in response to an energy storage regulation strategy of increasing energy storage, the minimum and maximum values ​​of the power adjustable range can be obtained according to the following formula (2):

[0079]

[0080] Among them, P a For the minimum value, P b For the maximum value, P 放电max P represents the maximum discharge power of the energy storage device in the integrated energy system. 充电max P is the maximum charging power of the energy storage device. 实时This represents the current power of the energy storage device. For example, the maximum charging power P of the energy storage device. 充电max It is 10MW, with a maximum discharge power P 放电max The current power P of the energy storage device is 10MW. 实时 If the capacity is 4MW, the energy storage device can be adjusted down to 14.0MW and up to 6.0MW. The adjustable range based on the upward adjustment of energy storage is denoted as (-14.0, 6.0).

[0081] Step 32: Based on the adjustable power range and the second power parameters of each power supply device and each electrical device, multiple switching combinations are determined. The power supply devices are configured to include multiple wind power collector lines and multiple photovoltaic collector lines, and the electrical devices are configured to include multiple load lines. This embodiment of the application determines multiple switching combinations and selects the appropriate switching combination for different types of faults for disconnection, while simultaneously combining energy storage power regulation for power redistribution and balancing.

[0082] In some embodiments, step 32, based on the adjustable power range, the second power parameters of each power supply device and each electrical device, determines multiple combinations to be switched, including: in response to the energy storage regulation strategy being energy storage downgrade, determining multiple first combinations based on at least one of multiple wind power collectors and multiple photovoltaic collectors, and a first steady-state power of each first combination; and collectively determining the multiple first combinations as the combinations to be switched. Specifically, when the energy storage regulation strategy is energy storage downgrade, this application embodiment preferentially determines multiple first combinations based on at least one of multiple wind power collectors and multiple photovoltaic collectors to quickly adjust the power output of the power supply devices, achieve the purpose of reducing power in a short time, avoid the impact of power imbalance on the integrated energy system, and maintain the stability of the frequency and voltage of the integrated energy system.

[0083] In some embodiments, step 32, determining multiple combinations to be switched based on the adjustable power range, the second power parameters of each power supply device and each electrical device, further includes: determining a second combination based on at least one of the multiple first combinations and at least one of the multiple load lines, and the second steady-state power of each second combination; and jointly determining the multiple first combinations and multiple second combinations as the combinations to be switched. Specifically, when the energy storage regulation strategy is energy storage downsizing, this application embodiment determines the first combination and the first steady-state power based on multiple wind power collectors and photovoltaic collectors, and then determines the second combination and the second steady-state power in combination with the load lines, providing multiple combination methods for energy storage downsizing and improving the flexibility of energy storage downsizing. This application can select the most suitable combination to be switched from multiple first combinations and / or multiple second combinations according to the actual situation to achieve the best power downsizing effect.

[0084] In some embodiments, step 32, determining multiple combinations to be switched based on the adjustable power range, the second power parameters of each power supply device and each electrical device, further includes: in response to the energy storage regulation strategy being energy storage up-regulation, determining multiple first combinations based on at least one of multiple load lines, and a first steady-state power of each first combination, and collectively determining the multiple first combinations as the combinations to be switched. Unlike energy storage down-regulation, when the energy storage regulation strategy is energy storage up-regulation, this embodiment prioritizes determining the first combination and the first steady-state power based on multiple load lines, which can quickly balance power, optimize load distribution, promote demand-side response, improve energy efficiency, and ensure the stable operation of the integrated energy system.

[0085] In some embodiments, step 32, determining multiple switching combinations based on the power adjustable range, the second power parameters of each power supply device and each electrical device, further includes: determining a second combination based on at least one of multiple first combinations, at least one of multiple wind power collectors and multiple photovoltaic collectors, and the second steady-state power of each second combination. Multiple first combinations and multiple second combinations are collectively determined as the switching combinations. Unlike energy storage downregulation, when the energy storage regulation strategy is energy storage upregulation, this application embodiment determines the first combination and first steady-state power based on multiple load lines, and then combines the wind power collectors and photovoltaic collectors to determine the second combination and second steady-state power, providing multiple combination methods for energy storage upregulation and improving the flexibility of energy storage upregulation. This application can also select the most suitable switching combination from multiple first combinations and / or multiple second combinations according to actual conditions to achieve the best power upregulation effect.

[0086] It can be seen that due to different energy storage regulation strategies, the specific combinations of the first and second combinations, as well as the corresponding steady-state power, will change. When a Type I fault occurs in the integrated energy system, the integrated energy system loses load, the power supply exceeds the load power, and the frequency of the integrated energy system increases. At this time, the energy storage regulation strategy is to reduce energy storage, which requires first disconnecting either the wind power collector or the photovoltaic collector. Therefore, the first combination is at least one of multiple wind power collectors and multiple photovoltaic collectors, which can also be referred to as disconnecting at least one power collector alone. When disconnecting the power collector alone cannot meet the energy storage reduction requirement, a second combination is further determined based on at least one of the multiple first combinations and at least one of the multiple load lines, that is, combining the disconnection of the power collector and the disconnection of the load to further meet the energy storage reduction requirement.

[0087] Similarly, when a Type II fault occurs in the integrated energy system, the system loses power, the power output is less than the load power, and the system frequency decreases. In this case, the energy storage regulation strategy is to increase energy storage capacity, requiring the initial load shedding. Therefore, the first combination is at least one of multiple load lines. When simply shedding a load line cannot meet the energy storage increase demand, a second combination is further determined based on at least one of the multiple first combinations, at least one of multiple wind power collector lines, and at least one of multiple photovoltaic collector lines. This combines load shedding and power collector line shedding to further meet the energy storage increase demand. It can be seen that the shedding objective of this application organically combines shedding power collector lines and shedding load lines, avoiding power instability caused by simply shedding either a power collector line or a load line, thus improving the safety of the integrated energy system.

[0088] Step 33: Determine the power cut-off reference value based on the steady-state power and fault mitigation measures of the combination to be cut off; the steady-state power is the power of the combination to be cut off at a preset time point before the fault. Specifically, this embodiment of the application determines the power cut-off reference value by considering the steady-state power of the combination to be cut off at a preset time point before the fault and the fault mitigation measures. The steady-state power reflects the power state of the combination to be cut off during normal operation of the integrated energy system, while the fault mitigation measures reflect the degree of impact of the fault on the integrated energy system. The power cut-off reference value determined by combining these two factors helps to quickly adjust the power balance of the integrated energy system after a fault, reducing power excess or deficiency, and enabling the integrated energy system to operate stably in the new state.

[0089] In some embodiments, step 33 determines the power cut-off reference value based on the steady-state power and fault mitigation measures of the combination to be cut off, including: obtaining a first reference value for each first combination based on the fault mitigation measures and the first steady-state power; and obtaining a second reference value for each second combination based on the fault mitigation measures, the first steady-state power, and the second steady-state power. Thus, by simultaneously obtaining the first and second reference values, this embodiment avoids the limitation of a single factor determining the power cut-off reference value, comprehensively integrating multiple key elements closely related to the operating state of the integrated energy system. This allows the finally determined power cut-off reference value to more accurately reflect the actual situation of the integrated energy system after a fault, and to better match the power characteristics of different combinations to be cut off before and after a fault, as well as the degree of measures required to address the fault, thereby providing precise guidance for subsequent cut-off operations. In particular, considering the different states corresponding to the first and second combinations, obtaining corresponding reference values ​​separately allows for differentiated processing based on the characteristics of different combinations to be cut off, helping to achieve more accurate and targeted power cut-off arrangements and avoiding the irrationality of a "one-size-fits-all" approach.

[0090] In some embodiments, this application can obtain the first reference value and the second reference value using the following formula:

[0091] K1 = P 措施量 -P i (3);

[0092] K2 = P 措施量 +P j -P i (4);

[0093] Where K1 is the first reference value, P 措施量 P represents the quantity of fault response measures. i K2 is the first steady-state power, and P is the second reference value. j This is the second steady-state power.

[0094] It should be noted that, in conjunction with the foregoing explanation, in response to the energy storage regulation strategy of either increasing or decreasing energy storage, P in the above formula... i and P j The different combinations to be cut are different, which will not be elaborated here.

[0095] Step 34: Based on the adjustable power range and power cut-off reference value, determine the target cut-off equipment and the power adjustment amount. In this way, this application precisely selects the target cut-off equipment and rationally determines the power adjustment amount, ensuring it perfectly matches the needs of the integrated energy system. This avoids problems such as instability caused by setting unreasonable adjustment amounts, enabling targeted responses to faults, timely intervention and mitigation of fault impacts, and flexible adjustment of power layout, thereby improving the robustness of the integrated energy system to better cope with various complex operating conditions and fault situations.

[0096] In some embodiments, step 34, determining the target cut-off device and power adjustment amount based on the power adjustable range and power cut-off reference value, includes: screening all first reference values ​​within the power adjustable range; identifying the first combination with the smallest first steady-state power among the screened first reference values ​​as the target cut-off device; and determining the first reference value of the target cut-off device as the power adjustment amount. It can be understood that when there are multiple first combinations with the smallest first steady-state power, priority is given to selecting the first combination with the smaller cut-off capacity or number of cut-offs. Thus, by screening first reference values ​​within the power adjustable range and selecting the first combination with the smallest first steady-state power as the target cut-off device, this application accurately cuts off the portion with the least impact on the integrated energy system, avoids resource waste, and reasonably determines the power adjustment amount.

[0097] In response to the energy storage regulation strategy, the energy storage capacity is reduced. Taking the PCC tie line disconnection (power connected to the grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is -4MW, and the power connected to the grid via the tie line is 10.0MW. A tie line tripping fault occurs. Please refer to Table 1:

[0098] Table 1

[0099]

[0100] At this point, the fault response amount is 10.0MW. Based on the energy storage reduction, the adjustable power range of the energy storage device is (-14.0, 6.0). If cutting wind power collector line 1 alone leaves 8.0MW, cutting wind power collector line 2 alone leaves 2MW, cutting photovoltaic collector line 1 alone leaves -2.0MW, and cutting photovoltaic collector line 2 alone leaves -4.0MW, it can be seen that cutting wind power collector line 2, photovoltaic collector line 1, or photovoltaic collector line 2 are all within the energy storage adjustment range. Therefore, the combination with the smallest cut-off amount is selected, that is, cutting wind power collector line 2, which reduces the power of the energy storage device by 2.0MW.

[0101] In response to the energy storage regulation strategy, the energy storage capacity is increased. Taking the PCC tie line disconnection (power off-grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is 4MW, and the off-grid power is 8.0MW. A tie line tripping fault occurs. Please refer to Table 2:

[0102] Table 2

[0103]

[0104] The fault response capacity is 8.0MW, and the controlled objects are energy storage and load lines. Based on the energy storage adjustment, the adjustable power range of the energy storage equipment is (-14.0, 6.0). After cutting load line 1, 7MW remains; after cutting load line 2, 4MW remains; and after cutting load line 3, 3MW remains. It can be seen that cutting load line 2 or load line 3 is within the energy storage adjustment range. Therefore, the combination with the smallest cutoff amount is selected, i.e., cutting load line 2, which increases the power of the energy storage equipment by 4.0MW.

[0105] In some embodiments, step 34, determining the target cut-off device and power adjustment amount based on the power adjustable range and power cut-off reference value, further includes: in response to the failure to find a first reference value within the power adjustable range, filtering all second reference values ​​within the power adjustable range; among the second combinations corresponding to the filtered second reference values, determining the second combination with the smallest sum of the first steady-state power and the second steady-state power as the target cut-off device; and determining the second reference value of the target cut-off device as the power adjustment amount. Thus, through related supplementary operations—that is, when the first reference value is not found within the power adjustable range, instead filtering the second reference value, and selecting the second combination with the smallest sum of the first steady-state power and the second steady-state power as the target cut-off device, and its second reference value as the power adjustment amount—the flexibility and adaptability of the integrated energy system can be enhanced to cope with complex faults, expand the decision-making space, optimize resource allocation and utilization to minimize power loss, and accurately adjust power. It can also improve operation and management efficiency and reliability, clarify operating procedures, reduce operational risks, and contribute to the stable operation and reliable power supply of the integrated energy system.

[0106] In response to the energy storage regulation strategy, the energy storage capacity is reduced. Taking the PCC tie line disconnection (power connected to the grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is -4MW, and the power connected to the grid via the tie line is 10.0MW. A tie line tripping fault occurs. Please refer to Table 3:

[0107] Table 3

[0108]

[0109] The fault response capacity is 10.0MW. Based on the energy storage reduction, the adjustable power range of the energy storage device is (-14.0, 6.0). Cutting wind power collector line 1 leaves 8MW remaining, cutting wind power collector line 2 leaves -18MW remaining, cutting photovoltaic collector line 1 leaves -16MW remaining, cutting photovoltaic collector line 2 leaves -20MW remaining, and other combinations of cutting wind and photovoltaic collector lines have even larger remaining capacities, all outside the energy storage adjustment range. Therefore, this application includes the load line. Cutting photovoltaic collector line 1 + load line 1 leaves -6MW remaining, and cutting photovoltaic collector line 1 + load line 2 leaves 4MW remaining. Within the adjustable power range of the energy storage device, the combination with the smallest power line and load line cutoff is selected, i.e., cutting photovoltaic collector line 1 + load line 1. The energy storage reduction is 10 + 10 - 26 = -6MW, meaning the energy storage device's power is increased by 6MW.

[0110] In response to the energy storage regulation strategy, the energy storage capacity is increased. Taking the PCC tie line disconnection (power off-grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is 4MW, and the off-grid power is 10.0MW. A tie line tripping fault occurs. Please refer to Table 4:

[0111] Table 4

[0112]

[0113] The fault response capacity is 10.0MW. Based on the energy storage upgrade, the adjustable power range of the energy storage device is (-14.0, 6.0). With load line 1 cut off, there is 8MW remaining; with load line 2 cut off, there is -16MW remaining; and with load line 1 + load line 2 cut off, there is -18MW remaining, all outside the energy storage adjustment range. Including the wind power collector and photovoltaic collector, with load line 2 + wind power collector 1 cut off, there is -8MW remaining; and with load line 2 + photovoltaic collector 1 cut off, there is -6MW remaining, both within the adjustable power range of the energy storage device. The combination with the smallest power line and load line cutoff is selected, i.e., load line 2 + wind power collector 1. The energy storage upgrade is 10 + 8 - 26 = -8MW, meaning the energy storage device's power is reduced by 8MW.

[0114] In some embodiments, step 34, determining the target cut-off device and power adjustment amount based on the adjustable power range and the power cut-off reference value, further includes: in response to the failure to find the first and second reference values ​​within the adjustable power range, obtaining a third reference value for the second combination; the third reference value is configured as the over / under power or undercut power of the second combination after energy storage adjustment; filtering all third reference values ​​within the adjustable power range; among the second combinations corresponding to the filtered third reference values, determining the second combination with the smallest third reference value as the target cut-off device; and determining the maximum or minimum value of the adjustable power range as the power adjustment amount based on the second reference value of the target cut-off device. When the first and second reference values ​​are not found within the adjustable power range, the system can further obtain the third reference value of the second combination for processing. In particular, introducing the over / under power or undercut power after energy storage adjustment as the third reference value fully leverages the adjustment role of energy storage devices in the integrated energy system, enabling energy storage devices to respond quickly in the event of a fault or power imbalance, providing additional power support or absorbing excess power, thereby helping the integrated energy system restore stability. By considering reference values ​​adjusted by energy storage, integrated energy systems can better utilize energy storage resources, improving their stability and reliability. In the face of various extreme failure scenarios, integrated energy systems have corresponding countermeasures and will not be trapped due to the inability to find suitable reference values, thereby improving their adaptability and reliability in complex and ever-changing operating environments.

[0115] In some embodiments, the third reference value is obtained based on the fault response quantity, the first steady-state power, the second steady-state power, and the adjustable power range. Specifically, the fault response quantity reflects the degree of measures required to address the fault, the first and second steady-state power reflect the power state of different switching combinations in the integrated energy system, and the adjustable power range limits the power adjustment range of the energy storage device. This application combines these three parameters to determine the third reference value, which can more accurately reflect the state of the integrated energy system after a fault, thereby making the decision-making more scientific and reasonable.

[0116] In some embodiments, the third reference value is obtained based on the following formula:

[0117]

[0118] Among them, P 措施量 P represents the quantity of fault response measures. i For the first steady-state power, P j For the second steady-state power, ΔP i As the third reference value, P a P is the minimum value of the adjustable power range. b This represents the maximum value within the adjustable power range.

[0119] In response to the energy storage regulation strategy, the energy storage capacity is reduced. Taking the PCC tie line disconnection (power connected to the grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is -4MW, and the power connected to the grid via the tie line is 10.0MW. A tie line tripping fault occurs. Please refer to Table 5:

[0120] Table 5

[0121]

[0122]

[0123] The fault mitigation amount is 10.0MW. Based on the reduction in energy storage capacity, the adjustable range of the energy storage device's power is (-14.0, 6.0). Any combination of cutting wind power collectors, photovoltaic collectors, and load lines cannot be balanced by energy storage. Furthermore, cutting wind power collector 1 reduces the energy storage device's power by 6MW, 10-3-6=1MW, resulting in an under-cut of 1MW; cutting wind power collector 2 + load line 1 + load line 2 increases the energy storage device's power by 14MW, 10+4+6-40-(-14)=-6MW, resulting in an over-cut of 6MW. The combination with the smallest over-cut or under-cut amount ΔPi is selected; therefore, the final choice is to cut wind power collector 1, reducing the energy storage device's power by 6MW.

[0124] In response to the energy storage regulation strategy, the energy storage capacity is increased. Taking the PCC tie line disconnection (power off-grid) as an example, the maximum charging power of the energy storage device is 10MW, the maximum discharging power is 10MW, the current power is 4MW, and the off-grid power is 10.0MW. A tie line tripping fault occurs. Please refer to Table 6:

[0125] Table 6

[0126]

[0127] The fault mitigation capacity is 10.0MW. Based on the energy storage upgrade, the adjustable power range of the energy storage device is (-14.0, 6.0). Any combination of cutting wind power collectors, photovoltaic collectors, and load lines cannot be balanced by energy storage. Furthermore, cutting load line 1 increases the energy storage device's power by 6MW, 10-2-6=2MW, resulting in a 2MW under-cut; cutting load line 2 + wind power collector 1 increases the energy storage device's power by 6MW, 10+24-26=2MW, resulting in a 2MW under-cut. The combination with the smallest over-cut or under-cut amount ΔPi is selected. Since the under-cut amounts are equal, the combination with the smaller cut capacity and number of cuts is preferred. Therefore, the final choice is to cut load line 1, increasing the energy storage device's power by 6MW.

[0128] Step 40: Disconnect the target disconnect device and adjust the charging and discharging power of the energy storage device based on the power regulation amount and energy storage regulation strategy. Thus, by disconnecting the target disconnect device, this application can quickly disconnect at least one of the wind power collector line, photovoltaic collector line, and load line. Simultaneously, by adjusting the charging and discharging power of the energy storage device based on the power regulation amount, the power balance of the integrated energy system can be quickly adjusted, effectively mitigating power fluctuations caused by faults and ensuring stable system operation after a fault occurs.

[0129] In summary, the embodiments of this application provide a power control method for an integrated energy system, which is used to redistribute the power of the integrated energy system after a failure occurs. The method combines power regulation amount, energy storage regulation strategy and target disconnection equipment to jointly regulate the power of the integrated energy system after the failure, maintain power balance, and improve the stability and safety of the integrated energy system.

[0130] Please see Figure 4 , Figure 4This is a schematic diagram of the structure of the power control system of the integrated energy system provided in the embodiments of this application. Accordingly, this application also provides a power control system for an integrated energy system, used to execute the power control method of the integrated energy system as described in any of the above embodiments. The power control system includes: a fault measure quantity acquisition module, an energy storage regulation strategy determination module, a power regulation quantity and target disconnection device determination module, and a processing module. The fault measure quantity acquisition module is configured to acquire fault measure quantity in response to a power adjustment command; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs; the energy storage regulation strategy determination module is configured to determine the energy storage regulation strategy based on the type of fault; the energy storage regulation strategy includes energy storage up-adjustment and / or energy storage down-adjustment; the power regulation quantity and target disconnection device determination module is configured to determine the power regulation quantity of the energy storage device and the target disconnection device based on the fault measure quantity, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, the target disconnection device includes at least one of power supply equipment and power consumption equipment; the first power parameter includes the maximum discharge power, maximum charging power, and current power of the energy storage device; the processing module is configured to disconnect the target disconnection device and adjust the charging and discharging power of the energy storage device based on the power regulation quantity and the energy storage regulation strategy.

[0131] It is understood that, compared with the prior art, the power control system for an integrated energy system provided in this application includes all the technical features and effects of the power control method for the integrated energy system described above, and will not be repeated here.

[0132] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0133] The power control method and system of an integrated energy system provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power control method for an integrated energy system, characterized in that, include: In response to a power adjustment command, a fault measure quantity is obtained; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs. Determine the energy storage regulation strategy based on the type of fault; The energy storage regulation strategy includes energy storage up-regulation and / or energy storage down-regulation; Based on the fault mitigation measures, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, the power regulation amount of the energy storage device and the target disconnected device are determined. The target disconnected device includes at least one of the power supply device and the power consumption device. The first power parameter includes the maximum discharge power, the maximum charging power, and the current power of the energy storage device. The target removal device is removed, and the charging and discharging power of the energy storage device is adjusted based on the power adjustment amount and the energy storage adjustment strategy.

2. The power control method for an integrated energy system according to claim 1, characterized in that, Based on the fault mitigation measures, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be disconnected, the power regulation amount of the energy storage device and the target disconnected device are determined, including: The adjustable power range of the energy storage device is determined based on the energy storage regulation strategy and the first power parameter. Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, a plurality of combinations to be switched are determined, wherein the power supply device is configured to include a plurality of wind power collector lines and a plurality of photovoltaic collector lines, and the electrical device is configured to include a plurality of load lines; Based on the steady-state power of the combination to be cut and the fault mitigation measures, a power cut-off reference value is determined; the steady-state power is the power of the combination to be cut at a preset time point before the fault. Based on the power adjustable range and the power cut-off reference value, the target cut-off device and the power adjustment amount are determined.

3. The power control method for an integrated energy system according to claim 2, characterized in that, Determining the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter includes: In response to the energy storage regulation strategy of reducing energy storage, the minimum value of the power adjustable range is determined based on the maximum discharge power and the current power, and the maximum value of the power adjustable range is determined based on the maximum charging power and the current power.

4. The power control method for an integrated energy system according to claim 2, characterized in that, Determining the adjustable power range of the energy storage device based on the energy storage regulation strategy and the first power parameter further includes: In response to the energy storage regulation strategy of increasing energy storage, the minimum value of the power adjustable range is determined based on the maximum charging power and the current power, and the maximum value of the power adjustable range is determined based on the maximum discharging power and the current power.

5. The power control method for an integrated energy system according to claim 3, characterized in that, Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, multiple combinations to be switched are determined, including: In response to the energy storage regulation strategy for energy storage downgrade, a plurality of first combinations are determined based on at least one of the plurality of wind power collectors and the plurality of photovoltaic collectors, and a first steady-state power of each first combination; Multiple first combinations are collectively identified as the combination to be cut.

6. The power control method for an integrated energy system according to claim 5, characterized in that, Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, multiple combinations to be switched are determined, further including: A second combination is determined based on at least one of the plurality of first combinations and at least one of the plurality of load lines, and a second steady-state power for each of the second combinations; Multiple first combinations and multiple second combinations are collectively determined as the combination to be cut.

7. The power control method for an integrated energy system according to claim 4, characterized in that, Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, multiple combinations to be switched are determined, further including: In response to the energy storage regulation strategy for energy storage up-adjustment, a plurality of first combinations are determined based on at least one of the plurality of load lines, and a first steady-state power for each of the first combinations; Multiple first combinations are collectively identified as the combination to be cut.

8. The power control method for an integrated energy system according to claim 7, characterized in that, Based on the power adjustable range, the second power parameters of each power supply device and each electrical device, multiple combinations to be switched are determined, further including: A second combination is determined based on at least one of the multiple first combinations, at least one of the multiple wind power collectors and at least one of the multiple photovoltaic collectors, and a second steady-state power of each second combination; Multiple first combinations and multiple second combinations are collectively determined as the combination to be cut.

9. The power control method for an integrated energy system according to claim 6 or 8, characterized in that, Based on the steady-state power of the combination to be cut and the fault mitigation measures, a power cut-off reference value is determined, including: Based on the fault measure quantity and the first steady-state power, obtain a first reference value for each of the first combinations; Based on the fault measure quantity, the first steady-state power, and the second steady-state power, a second reference value is obtained for each of the second combinations.

10. The power control method for an integrated energy system according to claim 9, characterized in that, Based on the adjustable power range and the power cut-off reference value, determining the target cut-off device and the power adjustment amount includes: Filter all the first reference values ​​within the power adjustable range; Among the first combinations corresponding to the first reference value selected, the first combination with the smallest first steady-state power is determined as the target removal device; The first reference value of the target removal device is determined as the power adjustment amount.

11. The power control method for an integrated energy system according to claim 9, characterized in that, Determining the target cut-off device and the power adjustment amount based on the power adjustable range and the power cut-off reference value further includes: In response to the failure to find the first reference value within the power adjustable range, all second reference values ​​within the power adjustable range are filtered. Among the second combinations corresponding to the selected second reference values, the second combination with the smallest sum of the first steady-state power and the second steady-state power is determined as the target removal device; The second reference value of the target removal device is determined as the power adjustment amount.

12. The power control method for an integrated energy system according to claim 9, characterized in that, Determining the target cut-off device and the power adjustment amount based on the power adjustable range and the power cut-off reference value further includes: In response to the failure to filter out the first reference value and the second reference value within the power adjustable range, a third reference value of the second combination is obtained; the third reference value is configured as the over / under power or undercut power of the second combination after energy storage regulation; Filter all of the third reference values ​​within the power adjustable range; Among the second combinations corresponding to the selected third reference value, the second combination with the smallest third reference value is determined as the target resection device; Based on the second reference value of the target removal device, the maximum or minimum value of the power adjustable range is determined as the power adjustment amount.

13. The power control method for an integrated energy system according to claim 12, characterized in that, The third reference value is obtained based on the fault measure quantity, the first steady-state power, the second steady-state power, and the power adjustable range.

14. A power control system for an integrated energy system, characterized in that, A power control method for performing an integrated energy system as described in any one of claims 1 to 13, the power control system comprising: The fault measure quantity acquisition module is configured to acquire fault measure quantity in response to a power adjustment command; the fault measure quantity is the absolute power value of the integrated energy system before a fault occurs. An energy storage regulation strategy determination module is configured to determine an energy storage regulation strategy based on the type of the fault; the energy storage regulation strategy includes energy storage up-regulation and / or energy storage down-regulation. The power regulation amount and cut-off target determination module is configured to determine the power regulation amount of the energy storage device and the target cut-off device based on the fault measure amount, the energy storage regulation strategy, the current first power parameter of the energy storage device, and the current second power parameter of the device to be cut off. The target cut-off device includes at least one of the power supply device and the power consumption device. The first power parameter includes the maximum discharge power, the maximum charging power, and the current power of the energy storage device. The processing module is configured to disconnect the target disconnect device and adjust the charging and discharging power of the energy storage device based on the power adjustment amount and the energy storage adjustment strategy.

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