Operation control method and system for flexible interconnection system in power distribution area

Abstract

The invention discloses an operation control method and system for a flexible interconnection system in a power distribution area, and relates to the technical field of multi-objective optimization, and the method comprises the steps: collecting operation data, carrying out the preprocessing of the operation data, and carrying out the calculation based on the preprocessed operation data, and obtaining a voltage deviation and a power balance deviation; according to the voltage deviation, the power balance deviation and the operation data, the operation state of the power distribution area flexible interconnection system is judged; if the judgment result is that the operation state is normal, generating an optimized operation instruction by using a multi-objective optimization algorithm, and transmitting the optimized operation instruction to an execution center of the flexible interconnection system in the power distribution area; an execution center of the power distribution area flexible interconnection system completes dynamic control and fault self-healing recovery according to the optimized operation instruction; according to the method, the voltage deviation, the power balance deviation and the line loss of the power distribution area are comprehensively optimized through the multi-objective optimization algorithm, and the operation efficiency and the flexibility of the flexible interconnection system of the power distribution area are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-objective optimization, and in particular to an operation control method and system for a flexible interconnection system of a distribution station area. Background Art

[0002] As modern power systems gradually develop in the direction of intelligence and distribution, the operation and control technology of distribution networks, as the terminal link of the power grid, faces new challenges. The traditional operation mode of distribution stations is mostly based on independent operation and management of single distribution stations, lacking the coordination ability between distribution stations, and it is difficult to adapt to the trend of high-proportion access of distributed energy, increased load volatility, and the growing personalized needs of power users. In recent years, flexible interconnection technology has been gradually introduced into distribution stations, and power flow regulation and voltage stability control between distribution stations have been realized through flexible devices (such as unified power flow controllers, static VAR compensators, etc.), which has improved the flexibility and reliability of distribution networks. However, the existing operation and control methods of flexible interconnection systems are mostly limited to single-objective optimization (such as power balance or voltage stability), lack consideration of multi-objective comprehensive optimization, and have problems of insufficient real-time and intelligence in operation status judgment and abnormal handling.

[0003] Existing technologies still have obvious deficiencies in the coordinated optimization of distribution station sections and fault self-healing capabilities. On the one hand, due to the dynamic nature and uncertainty of distributed energy and energy storage equipment, existing control methods are difficult to achieve comprehensive optimization of voltage deviations, power balance deviations, and line losses, resulting in large voltage fluctuations, uneven power distribution, and high line energy consumption in distribution station sections. On the other hand, in abnormal conditions or fault scenarios, the existing control system has limited response capabilities and lacks the ability to quickly isolate fault areas and dynamically schedule available resources, making it difficult to achieve rapid recovery of the system. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides an operation control method of a flexible interconnection system of a distribution station area to solve the dynamic multi-objective optimization problem across distribution stations.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In the first aspect, the present invention provides an operation control method for a flexible interconnection system in a distribution substation area, which includes collecting operation data, preprocessing the operation data, and calculating voltage deviation and power balance deviation based on the preprocessed operation data; judging the operation status of the flexible interconnection system in the distribution substation area according to the voltage deviation, power balance deviation and operation data; if the judgment result is that the operation status is normal, generating an optimized operation instruction by using a multi-objective optimization algorithm, and transmitting the optimized operation instruction to the execution center of the flexible interconnection system in the distribution substation area; the execution center of the flexible interconnection system in the distribution substation area completes dynamic control and fault self-healing recovery according to the optimized operation instruction.

[0008] As a preferred solution of the operation control method of the flexible interconnection system of the distribution station area described in the present invention, the operation data includes load data, distributed power supply data, energy storage device operation status, flexible interconnection device status and fault signals.

[0009] In a second aspect, the present invention provides an operation control system of a distribution substation area flexible interconnection system, comprising an acquisition module, a status module, an operation module and an execution self-healing module; the acquisition module is used to acquire operation data, pre-process the operation data, and calculate voltage deviation and power balance deviation based on the pre-processed operation data; the status module is used to judge the operation state of the distribution substation area flexible interconnection system according to the voltage deviation, power balance deviation and operation data; the operation module is used to generate an optimized operation instruction using a multi-objective optimization algorithm if the judgment result is that the operation state is normal, and transmit the optimized operation instruction to the execution center of the distribution substation area flexible interconnection system; the execution self-healing module is used for the execution center of the distribution substation area flexible interconnection system to complete dynamic control and fault self-healing recovery according to the optimized operation instruction.

[0010] In a third aspect, the present invention provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program is executed by the processor, any step of the operation control method of the flexible interconnection system of the distribution station area as described in the first aspect of the present invention is implemented.

[0011] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program is executed by a processor, any step of the operation control method of the flexible interconnection system of the distribution station area as described in the first aspect of the present invention is implemented.

[0012] The beneficial effects of the present invention are as follows: the present invention comprehensively optimizes the voltage deviation, power balance deviation and line loss of the distribution station area through a multi-objective optimization algorithm, thereby significantly improving the operating efficiency and flexibility of the flexible interconnection system of the distribution station area; by setting the optimization objective function and dynamically adjusting the optimization priority in combination with real-time operation data, optimal control is achieved in different operation scenarios; when the power deviation exceeds the limit, the power is balanced first, when the voltage deviation exceeds the limit, the voltage is stabilized first, when the line loss exceeds the limit, the loss is reduced first, and dynamic optimization instructions are generated through hierarchical progressive optimization (node ​​level, regional level, global level); this method overcomes the problems of single optimization target or inflexible priority adjustment in the prior art, can reduce energy consumption while meeting voltage stability and supply and demand balance, and significantly improves the overall reliability and operation economy of the flexible interconnection system of the distribution station area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0014] Figure 1 This is a flow chart of the operation control method of the flexible interconnection system of the distribution station area in Example 1.

[0015] Figure 2 This is a module diagram of the operation control system of the distribution station area flexible interconnection system in Example 1. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0017] Example 1, reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and provides an operation control method of a flexible interconnection system of a distribution station area, comprising the following steps:

[0018] S1. Collecting operation data, preprocessing the operation data, and calculating voltage deviation and power balance deviation based on the preprocessed operation data.

[0019] Furthermore, the operating data includes load data, distributed power supply data, energy storage equipment operating status, flexible interconnection equipment status and fault signals.

[0020] Specifically, distributed sensor networks and flexible interconnection devices are deployed at key nodes in the distribution substation area to collect real-time operation data of the flexible interconnection system in the distribution substation area, including load data, distributed power supply data, energy storage equipment operation status, flexible interconnection equipment status and fault signals;

[0021] The load data are voltage, current, active power and reactive power;

[0022] The distributed power data are the real-time output power of photovoltaic and wind power;

[0023] The operating states of the energy storage device are respectively the charging and discharging power and the remaining capacity of the energy storage device;

[0024] The states of the flexible interconnection devices are the power flow and voltage level at the interconnection point in the distribution substation area;

[0025] The fault signals are respectively monitoring abnormal conditions such as overload, short circuit and voltage exceeding the limit in the distribution station area.

[0026] The distribution substation is the basic part of the flexible interconnection equipment, and its main function is to achieve local supply and demand balance and voltage stability;

[0027] The flexible interconnection device is responsible for receiving optimization instructions and coordinating the operation of the flexible interconnection device to achieve functions such as supply and demand balance, voltage stability and fault recovery across distribution substations;

[0028] The distribution substation area and flexible interconnection equipment equal the distribution substation area flexible interconnection system. The combination of the two constitutes a complete distribution substation area flexible interconnection system, which together realizes efficient, reliable and flexible distribution network operation.

[0029] S1.1. Preprocess the operation data, and calculate the voltage deviation and power balance deviation based on the preprocessed operation data, specifically,

[0030] Use edge computing devices to clean the operating data to remove noise (eliminate noise data and invalid data to ensure data accuracy) and normalize the data (unify variables of different dimensions (such as voltage, current, and power) to the same numerical range to facilitate subsequent calculations);

[0031] In the flexible interconnection system of the distribution station area, edge computing equipment is responsible for real-time collection, analysis and pre-processing of operating data;

[0032] After the preprocessing is completed, the voltage deviation and power balance deviation are calculated;

[0033] The voltage deviation expression is:

[0034] ΔV i =|V i -V s |;

[0035] Where, ΔV i is the voltage deviation of the ith node, V i is the actual voltage of the ith node, V s is the rated voltage, i is the index of the node;

[0036] The power balance deviation expression is:

[0037]

[0038] Where ΔP is the power balance deviation, which represents the difference between the required power and the supplied power, N is the total number of load nodes, and P i is the load power of the i-th node, M is the total number of flexible interconnect devices, and L j is the power loss of the jth line, which is determined by the line resistance and current, K is the number of all distributed power sources, P d,k is the output power of the kth distributed power source, such as photovoltaic, wind power, etc., k is the index of the distributed power source number, d is the category of the distributed power source, H is the number of all energy storage devices, E h is the charge and discharge power of the hth energy storage device. A positive value indicates discharge, and a negative value indicates charge. c is the power flow of the cth flexible interconnection device. A positive value indicates that the power flows into the current distribution substation, and a negative value indicates that the power flows out of the current distribution substation. c is the index of the flexible interconnection device, j is the index of the line, and h is the index of the energy storage device.

[0039] Based on the traditional power balance formula, this formula adds the charging and discharging power of energy storage equipment, the power flow of flexible interconnection equipment and line loss, which fully reflects the dynamic supply and demand characteristics of modern distribution substations. By comprehensively considering the role of distributed power sources, energy storage equipment and flexible interconnection equipment, the formula can more accurately evaluate the power imbalance state of the distribution system and provide a basis for dynamic optimization and real-time adjustment.

[0040] It should be noted that by deploying distributed sensor networks and flexible interconnected devices, multi-dimensional data such as loads, distributed power sources, energy storage equipment and fault signals are collected, and edge computing is used to complete data cleaning and normalization processing to ensure data accuracy and consistency. By calculating voltage deviation and power balance deviation, the charging and discharging power of energy storage equipment, power flow of flexible interconnected equipment and line loss in the formula, the dynamic supply and demand characteristics of flexible interconnected systems in modern distribution substations are fully reflected, providing an accurate basis for supply and demand balance, voltage stability and dynamic optimization, and realizing efficient and flexible operation of the distribution network.

[0041] S2. Determine the operating status of the flexible interconnection system in the distribution substation area based on voltage deviation, power balance deviation and operating data.

[0042] Furthermore, if the node voltage in the distribution area deviates from the rated value (ΔV i >ΔV max ), which may cause the flexible interconnection system of the distribution substation area to fail or reduce the operating efficiency, then the operating state of the flexible interconnection system of the distribution substation area is determined to be an abnormal state;

[0043] If the node voltage in the distribution area is close to the rated value and the deviation is within the allowable range (ΔV i <ΔV max ), the voltage distribution is stable, then the operation state of the flexible interconnection system of the distribution substation area is determined to be normal;

[0044] If the power balance deviation of the flexible interconnection system in the distribution substation area cannot maintain the supply and demand balance (ΔP>ΔP max ), which may cause power grid fluctuations or load failure, and the operation state of the flexible interconnection system of the distribution substation area is determined to be abnormal;

[0045] If the power balance deviation of the flexible interconnection system in the distribution substation area is within the allowable range (ΔP<ΔP max ), the flexible interconnection equipment and the energy storage center can be effectively adjusted to meet the load demand, then the operation status of the flexible interconnection system in the distribution station area is determined to be normal;

[0046] If a fault signal is displayed (such as overload, short circuit or voltage exceeding the limit, etc.), it indicates that the flexible interconnection system in the distribution substation area is faulty. The flexible interconnection system in the distribution substation area is judged to be in a fault state and needs to enter the fault self-healing recovery mode immediately;

[0047] It should be noted that the operating status of the flexible interconnection system in the distribution station area is judged in real time through voltage deviation, power balance deviation and fault signal, and the three states of normal, abnormal and fault are distinguished; thresholds are set to accurately determine voltage stability and supply and demand balance to ensure effective adjustment of flexible interconnection equipment and energy storage equipment. Abnormal conditions can warn of reduced efficiency or potential risks, and fault conditions can trigger self-healing mechanisms to ensure rapid recovery of the system. This method realizes dynamic monitoring and intelligent management of the status of the flexible interconnection system in the distribution station area, and improves operational reliability and flexibility.

[0048] S3. Check the normal status of the flexible interconnection equipment in the distribution substation area, generate optimized operation instructions using a multi-objective optimization algorithm, and transmit the optimized operation instructions to the execution center of the flexible interconnection system in the distribution substation area.

[0049] Furthermore, the voltage deviation, power balance deviation and line loss are analyzed, and the comprehensive optimization objectives and priorities are determined according to the multi-objective optimization algorithm, which is expressed as follows:

[0050]

[0051] Among them, Q is the comprehensive optimization target value, which is a comprehensive indicator used to measure the operating status of the system, min is the optimization direction of the objective function, that is, the minimum value of the comprehensive optimization target value, ΔP i is the power balance deviation of the ith node, V i,s is the rated voltage (reference voltage) of the i-th node voltage, I j is the current of the jth line, R j is the resistance of the jth line, is the loss of the jth line, |ΔP i | is to reduce node power deviation and ensure supply and demand balance, (V i -V s ) 2 is the square of the node voltage deviation, improving voltage stability, It is to reduce line loss and improve system operation efficiency;

[0052] This objective function combines the three optimization objectives of power balance deviation, voltage deviation and line loss, aiming to balance the supply and demand power, ensure voltage stability and reduce line loss. Compared with the traditional single-objective optimization, this formula combines the global power grid operation efficiency and stability through a multi-objective optimization algorithm, providing a theoretical basis for the efficient operation of the flexible interconnection system of the distribution substation area.

[0053] Define constraints and ensure that the optimization results meet the operating restrictions of the flexible interconnection system in the distribution substation area;

[0054] Node voltage constraints:

[0055]

[0056] in, is the minimum voltage allowed for the ith node (lower limit), is the maximum voltage allowed for the i-th node (upper limit);

[0057] Power flow constraints for flexible interconnect devices:

[0058]

[0059] Among them, F i is the actual power flow of the flexible interconnect device at the i-th node (i.e., the amount of power currently transferred by the device), is the lower limit of the power flow of the i-th flexible interconnect device (i.e., the minimum adjustable power flow of the device), is the upper limit of the power flow of the i-th flexible interconnect device (i.e., the maximum allowed power flow of the device);

[0060] When the power deviation exceeds the allowable range (|ΔP i |>ΔP max), indicating that the power generation and load demand in the distribution station area are seriously mismatched, which may lead to voltage fluctuations, equipment overload and other problems. Priority is given to power balance optimization. The optimization algorithm will prioritize the adjustment of distributed power output and the charging and discharging power of energy storage equipment to achieve supply and demand balance as soon as possible and restore normal power distribution;

[0061] When the node voltage deviation is large ((V i -V i,s ) 2 >ΔV max ), indicating that the voltage level of the flexible interconnection system in the distribution station area is unstable, which may lead to a decline in power supply quality or equipment damage. Priority should be given to voltage stability optimization. The optimization algorithm will prioritize improving voltage stability by adjusting the power output of distributed power sources, the charging and discharging actions of energy storage devices, and the power flow of flexible interconnection devices;

[0062] When the line loss exceeds the allowable range It shows that the loss of electric energy is large during transmission, which reduces the overall efficiency of the flexible interconnection system in the distribution substation area. Efficiency optimization is given priority. The optimization algorithm will give priority to reducing line losses and improving the operating efficiency of the flexible interconnection system in the distribution substation area by adjusting the distribution and transmission path of power flow;

[0063] After determining the comprehensive optimization goals and priorities, perform hierarchical and progressive optimization;

[0064] Generate dynamic optimization operation instructions based on hierarchical progressive optimization results, and output optimized voltage deviation, power balance deviation and line loss;

[0065] The dynamic optimization operation instructions are specifically: adjusting the power output of distributed power sources and energy storage devices and adjusting the power flow distribution of flexible interconnected devices.

[0066] S3.1. Layered progressive optimization, specifically:

[0067] Define the node level and balance local supply and demand by adjusting distributed power sources and energy storage devices;

[0068] Within the node range of a single distribution station area, by dynamically adjusting the output power of distributed power sources (such as photovoltaics, wind power, etc.) and the charging and discharging power of energy storage equipment, the power deviation of local nodes is balanced first; according to the SOC (state of charge) constraints of energy storage equipment, over-discharge or over-charging is avoided to ensure that the energy storage equipment operates within a reasonable range; the supply and demand matching of local load nodes is optimized, the fluctuations caused by power imbalance are reduced, and the operation stability of a single node is improved;

[0069] Define the regional level, balance the voltage distribution and reduce the voltage deviation by adjusting the power flow between nodes in the distribution station area;

[0070] Analyze the voltage deviation and power flow distribution of each node in the entire distribution area, optimize the local voltage distribution by adjusting the power flow between nodes; dynamically adjust the operating status of energy storage equipment and distributed power sources in the area, reduce the voltage deviation of high-load nodes, and improve the overall voltage stability; regulate the voltage of each node within the allowable range To ensure balanced voltage distribution within the substation area;

[0071] Define the global level and use flexible interconnection equipment to optimize the power flow between distribution stations, balance power distribution, and reduce high-loss line loads;

[0072] Between multiple distribution substations, flexible interconnection equipment (such as flexible DC transmission equipment) is used to coordinate power flows between substations and optimize power flow distribution across distribution substations. Based on power balance deviation and the load of high-loss lines, power scheduling across distribution substations is dynamically adjusted to prioritize power allocation to high-load areas and reduce the burden on high-loss lines. The supply and demand relationship of distribution substations is balanced to prevent voltage deviations or power imbalances in a single distribution substation from spreading to other distribution substations, thereby improving the operating efficiency and stability of the global distribution network.

[0073] It should be noted that through hierarchical progressive optimization (node ​​level, regional level, global level), combined with multi-objective optimization algorithms, the operating status of distributed power sources, energy storage equipment and flexible interconnection equipment can be dynamically adjusted; the node level optimizes the local supply and demand balance to reduce voltage deviation; the regional level optimizes power flow distribution to reduce high-loss line loads; the global level coordinates the power flow between distribution stations through flexible interconnection equipment to improve overall operating efficiency; comprehensively optimize power balance, voltage stability and line losses, generate dynamic operating instructions, ensure efficient and reliable operation of the flexible interconnection system in the distribution station area, and provide intelligent control means for the flexible interconnection system in the distribution station area.

[0074] S4. The flexible interconnection system execution center of the distribution station area completes dynamic control and fault self-healing recovery according to the optimized operation instructions.

[0075] Furthermore, dynamic optimization instructions are generated based on the hierarchical progressive optimization results, and the dynamic optimization instructions are distributed to the energy storage equipment, distributed power sources and flexible interconnection equipment in the distribution station area for execution;

[0076] Dynamically adjust the charge and discharge power of the energy storage device according to the optimized operation instructions, give priority to balancing the power balance deviation of the local nodes in the distribution area, and avoid over-discharge (for example, dynamically adjust the charge and discharge power of the energy storage device, give priority to balancing the power balance deviation of the local nodes in the distribution area, and avoid over-discharge according to the SOC state monitoring constraints of the energy storage device);

[0077] The constraints for SOC status monitoring are:

[0078] SOCmin ≤SOC≤SOC max ;

[0079] Among them, SOC min SOC is the lowest state of charge allowed by the energy storage device (usually 0% to 20%, depending on the device design). max It is the highest state of charge allowed by the energy storage device (usually 80% to 100%, depending on the device design). SOC is the state of charge of the energy storage device and is a key parameter of the energy storage device. It refers to the percentage of the current stored energy of the energy storage device to its maximum storage capacity. The SOC constraint ensures that the charging and discharging operations of the energy storage device are within a reasonable range and will not be overcharged or over-discharged.

[0080] Dynamically adjust the output power of distributed power sources according to the optimized operation instructions, give priority to the use of clean energy, and fine-tune the node voltage of the distribution station area to achieve real-time supply and demand balance, reduce power deviation, give priority to the consumption of clean energy, reduce operating costs and carbon emissions, and reduce voltage deviation through voltage fine-tuning, thereby improving power quality and the stability of the flexible interconnection system of the distribution station area;

[0081] According to the optimized operation instructions, the power flow of flexible interconnected devices is optimized, the power distribution across distribution stations is dynamically adjusted, the load on high-loss lines is reduced, and the voltage balance between distribution stations is achieved;

[0082] During the execution of the optimization instructions, the operating status of the flexible interconnection system in the distribution substation area is monitored in real time, including the SOC (state of charge) of the energy storage device, the output power of the distributed power source, the power flow of the flexible interconnection device, and the voltage changes of each node in the distribution substation area;

[0083] If the energy storage device does not fully respond to the optimization instruction (e.g. due to device capacity limitation or abnormal operation), record the real-time response deviation of the energy storage device, make feedback, and upload the feedback data to the multi-objective optimization algorithm to regenerate the optimization operation instruction adapted to the current state;

[0084] If the flexible interconnection device does not fully respond to the optimization operation instruction, regenerate the optimization operation instruction adapted to the current state;

[0085] The edge computing device analyzes voltage deviation and power balance deviation in real time. If an abnormal condition is found (such as node voltage exceeding the limit, power imbalance or equipment failure), the fault area is quickly isolated to prevent the fault from spreading.

[0086] Mobilize the remaining available resources of energy storage equipment, distributed power sources and flexible interconnection equipment to give priority to restoring power supply to critical loads (such as hospitals, communication base stations, etc.);

[0087] The remaining available resources include the remaining available resources of energy storage equipment, the remaining available resources of distributed power sources and the remaining available resources of flexible interconnection equipment;

[0088] The remaining available resources of the energy storage device are: the current state of charge SOC has not reached the minimum constraint, and has the ability to discharge further; or has not reached the maximum constraint, and has the ability to charge further;

[0089] Remaining discharge power: the difference between the maximum discharge power of the energy storage device and the current discharge power;

[0090] Remaining capacity: Current SOC and SOC of energy storage equipment min The difference in available energy between

[0091] The remaining available resources of distributed power sources are the currently available output power of distributed power sources such as photovoltaic power and wind power (affected by weather conditions, equipment limitations, etc.);

[0092] The difference between the current power generation and the rated maximum power of the equipment;

[0093] The remaining available resources of the flexible interconnection equipment are the power flow adjustment capacity of the flexible interconnection equipment between distribution stations (not reaching F min or F max scope);

[0094] The available power adjustment margin of the current equipment is used to adjust the power support of the distribution area;

[0095] Regulate the power flow of flexible interconnected devices across distribution stations to compensate for power balance deviations in faulty areas and avoid excessive discharge;

[0096] Optimize the dynamic output strategy of energy storage equipment and distributed power sources to achieve rapid recovery and reduce the overall fluctuation of the flexible interconnection system in the distribution station area;

[0097] After the fault area is restored, readjust the power balance and voltage distribution to ensure that the flexible interconnection system in the distribution substation area returns to normal operation;

[0098] When the node voltage in the distribution substation area is close to the rated value and the power balance deviation of the flexible interconnection system of the distribution substation area is within the allowable range (ΔV i <ΔV max and ΔP<ΔP max ), indicating that the operation status of the flexible interconnection system in the distribution station area has returned to normal;

[0099] It should be noted that by executing dynamic optimization instructions, coordinating energy storage devices, distributed power sources and flexible interconnected devices to achieve dynamic control and fault self-healing, energy storage devices balance local power deviations according to SOC constraints, distributed power sources optimize clean energy utilization and fine-tune point voltages, and flexible interconnected devices dynamically allocate cross-regional power flows to reduce losses and maintain voltage balance, monitor equipment response and operating status in real time, adjust optimization strategies for equipment that has not fully responded, quickly isolate faults and prioritize restoring power supply to critical loads, and ultimately achieve efficient recovery and stable operation of the flexible interconnected system in the distribution station area by adjusting power balance and voltage distribution.

[0100] The present embodiment also provides an operation control system of a distribution substation area flexible interconnection system, including: an acquisition module, a status module, an operation module and an execution self-healing module; the acquisition module is used to acquire operation data, pre-process the operation data, and calculate and obtain voltage deviation and power balance deviation; the status module is used to determine the operation status of the distribution substation area flexible interconnection system according to the voltage deviation, power balance deviation and operation data; the operation module is used to check the normal status of the distribution substation area flexible interconnection equipment, generate optimized operation instructions using a multi-objective optimization algorithm, and transmit the optimized operation instructions to the execution center of the distribution substation area flexible interconnection system; the execution self-healing module is used for the execution center of the distribution substation area flexible interconnection system to complete dynamic control and fault self-healing recovery according to the optimized operation instructions.

[0101] This embodiment also provides a computer device, which is suitable for the operation control method of the flexible interconnection system of the distribution station area, including: a memory and a processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the operation control method of the flexible interconnection system of the distribution station area proposed in the above embodiment.

[0102] The computer device may be a terminal, and the computer device includes a processor, a memory, a communication interface, a display screen and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, an operator network, NFC (near field communication) or other technologies. The display screen of the computer device may be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device may be a touch layer covering the display screen, or a key, trackball or touchpad provided on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0103] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, the operation control method of realizing the flexible interconnection system of the distribution station area proposed in the above embodiment is implemented; the storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, referred to as EPROM), programmable read-only memory (Programmable Red-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0104] In summary, the present invention comprehensively optimizes the voltage deviation, power balance deviation and line loss of the distribution station area through a multi-objective optimization algorithm, thereby significantly improving the operating efficiency and flexibility of the flexible interconnection system of the distribution station area; by setting the optimization objective function and dynamically adjusting the optimization priority in combination with real-time operation data, optimal control in different operation scenarios is achieved; when the power deviation exceeds the limit, the power is balanced first, when the voltage deviation exceeds the limit, the voltage is stabilized first, when the line loss exceeds the limit, the loss is reduced first, and dynamic optimization instructions are generated through hierarchical progressive optimization (node ​​level, regional level, global level); this method overcomes the problems of single optimization objectives or inflexible priority adjustment in the prior art, can reduce energy consumption while meeting voltage stability and supply and demand balance, and significantly improves the overall reliability and operation economy of the flexible interconnection system of the distribution station area.

[0105] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An operation control method for a flexible interconnection system of a distribution station area, characterized in that: include: Collecting operation data, preprocessing the operation data, and calculating voltage deviation and power balance deviation based on the preprocessed operation data; Determine the operating status of the flexible interconnection system in the distribution substation area based on voltage deviation, power balance deviation and operating data; If the result of the judgment is that the operation status is normal, the multi-objective optimization algorithm is used to generate an optimized operation instruction, and the optimized operation instruction is transmitted to the execution center of the flexible interconnection system of the distribution station area; The execution center of the flexible interconnection system of the distribution station area completes dynamic control and fault self-healing recovery according to the optimized operation instructions.

2. The operation control method of the flexible interconnection system of the distribution station area according to claim 1, characterized in that: The operating data includes load data, distributed power supply data, energy storage device operating status, flexible interconnection device status and fault signals.

3. The operation control method of the flexible interconnection system of the distribution station area according to claim 2, characterized in that: The operation data is preprocessed, and voltage deviation and power balance deviation are calculated based on the preprocessed operation data. The specific steps are: The edge computing equipment is used to clean the operating data, remove noise and normalize the data; after preprocessing, the voltage deviation and power balance deviation are calculated.

4. The operation control method of the flexible interconnection system of the distribution station area according to claim 3, characterized in that: The specific steps of determining the operating status of the flexible interconnection system of the distribution station area are as follows: If the node voltage in the distribution station area deviates from the rated value (ΔV i >ΔV max ), it is determined that the operation state of the flexible interconnection system of the distribution station area is abnormal; If the node voltage in the distribution area is close to the rated value and the deviation is within the allowable range (ΔV i <ΔV max ), it is determined that the operation status of the distribution station area flexible interconnection system is normal; If the power balance deviation of the flexible interconnection system in the distribution substation area cannot maintain the supply and demand balance (ΔP>ΔP max ), it is determined that the operation state of the flexible interconnection system of the distribution station area is abnormal; If the power balance deviation of the flexible interconnection system in the distribution substation area is within the allowable range (ΔP<ΔP max ), it is determined that the operation status of the distribution station area flexible interconnection system is normal; If a fault signal appears, it indicates that the flexible interconnection system in the distribution substation area is faulty. The flexible interconnection system in the distribution substation area is judged to be in a fault state and needs to enter the fault self-healing recovery mode immediately.

5. The operation control method of the flexible interconnection system of the distribution station area according to claim 4, characterized in that: The specific steps of using the multi-objective optimization algorithm to generate the optimization operation instructions are as follows: Analyze voltage deviation, power balance deviation and line loss, and determine comprehensive optimization goals and priorities based on a multi-objective optimization algorithm; When the power deviation exceeds the allowable range (|ΔP i |>ΔP max ), power balance optimization is prioritized; When the node voltage deviation is large ((V i -V i,s ) 2 >ΔV max ), voltage stability optimization is prioritized; When the line loss exceeds the allowable range Efficiency optimization is prioritized; After determining the comprehensive optimization goals and priorities, perform hierarchical and progressive optimization; According to the hierarchical progressive optimization results, dynamic optimization operation instructions are generated, and the optimized voltage deviation, power balance deviation and line loss are output.

6. The operation control method of the flexible interconnection system of the distribution station area according to claim 5, characterized in that: The specific steps of the hierarchical progressive optimization are as follows: Define the node level and balance local supply and demand by adjusting distributed power sources and energy storage devices; Define the regional level and balance the voltage distribution by adjusting the power flow between nodes in the distribution station area; Define the global level and use flexible interconnection devices to optimize the power flow between distribution stations and balance the power distribution.

7. The operation control method of the flexible interconnection system of the distribution station area according to claim 6, characterized in that: The specific steps of completing dynamic control and fault self-healing recovery according to the optimized operation instructions are as follows: Dynamically adjust the charging and discharging power of energy storage equipment according to the optimized operation instructions, giving priority to balancing the power balance deviation of local nodes in the distribution station area; Dynamically adjust the output power of distributed power sources according to the optimized operation instructions, give priority to the use of clean energy, and fine-tune the node voltage in the distribution station area; According to the optimized operation instructions, the power flow of flexible interconnected devices is optimized and the power distribution across distribution stations is dynamically adjusted; During the execution of optimized operation instructions, the operation status of the flexible interconnection system in the distribution substation area is monitored in real time; If the energy storage device does not fully respond to the optimization instruction, record the real-time response deviation of the energy storage device, make feedback, and upload the feedback data to the multi-objective optimization algorithm to regenerate the optimization operation instruction; If the flexible interconnect device does not fully respond to the optimization operation instruction, regenerate the optimization operation instruction; The voltage deviation and power balance deviation are analyzed in real time through edge computing devices. If an abnormal state is found, the fault area can be quickly isolated. Mobilize the remaining available resources of energy storage equipment, distributed power sources and flexible interconnection equipment to restore critical loads first; Regulate the power flow of flexible interconnected devices across distribution stations to compensate for power balance deviations in faulty areas; When the node voltage in the distribution station area is close to the rated value and the power balance deviation between supply and demand is within the allowable range (ΔV i <ΔV max and ΔP<ΔP max ), the operating status of the flexible interconnection system in the distribution station area returns to normal.

8. An operation control system of a flexible interconnection system of a distribution substation area, based on the operation control method of a flexible interconnection system of a distribution substation area according to any one of claims 1 to 7, characterized in that: include: Acquisition module, status module, operation module and execution self-healing module; The acquisition module is used to acquire operation data, pre-process the operation data, and calculate the voltage deviation and the power balance deviation based on the pre-processed operation data; The state module is used to determine the operating state of the flexible interconnection system of the distribution station area according to the voltage deviation, power balance deviation and operating data; The operation module is used to generate an optimization operation instruction using a multi-objective optimization algorithm if the judgment result is that the operation status is normal, and transmit the optimization operation instruction to the execution center of the flexible interconnection system of the distribution station area; The execution self-healing module is used for the execution center of the flexible interconnection system of the distribution station area to complete dynamic control and fault self-healing recovery according to the optimized operation instructions.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the operation control method of the distribution station area flexible interconnection system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the operation control method of the distribution station area flexible interconnection system according to any one of claims 1 to 7 are implemented.

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