Unit division-based inter-unit power mutual aid method, system and equipment for power distribution network and medium

Abstract

The invention discloses a unit division-based power mutual aid method, system and equipment for power distribution network units, and a medium. The method comprises the following steps of: acquiring operation data; identifying surplus units and shortage units in the power distribution network, and calculating the maximum supportable power and the minimum required power; performing power mutual aid path planning to generate an optimal mutual aid path; generating a power support instruction set through a supply-demand matching algorithm; power mutual aid operation is executed through the cooperative control architecture, the running state of the power distribution network is monitored, and a power adjustment instruction is generated and executed. According to the method, a power-resource-stability multi-dimensional evaluation system is constructed; multi-constraint path optimization, a centralized control mode and a distributed control mode are adopted for cooperative control, and efficient power transmission and quick response are achieved on the premise that line safety and voltage stability are guaranteed; and in combination with a real-time safety monitoring and adjusting mechanism, complete power mutual aid closed-loop management is formed, and the power supply reliability, the operation safety and the energy utilization efficiency of the power distribution network are improved.

Description

Technical Field

[0001] This invention relates to the field of power system operation and control technology, and in particular to a method, system, equipment and medium for power mutual assistance between distribution network units based on unit division. Background Technology

[0002] With the significant increase in the penetration rate of distributed photovoltaic (PV) and wind power in distribution networks, the operating characteristics of these networks have undergone significant changes. In traditional distribution networks, electricity is primarily transmitted unidirectionally from the upstream grid to the load. However, the integration of a high proportion of distributed power sources transforms the distribution network into an active network with bidirectional power flow. The intermittent output of distributed power sources within each distribution network unit and the volatility of load demand frequently lead to power supply and demand imbalances between these units: some distribution network units experience power surpluses due to large-scale PV generation, while others suffer power shortages due to peak loads. If this imbalance is not addressed promptly and effectively, it will result in both wind and solar power curtailment and a decline in power supply reliability.

[0003] In terms of condition assessment, existing power mutual assistance methods for distribution network units mostly rely on a single dimension such as power balance, voltage or frequency deviation for judgment, failing to comprehensively consider key resource characteristics such as the state of charge data of energy storage systems and the state of flexible load regulation data. This leads to biases in the assessment of the true mutual assistance potential of distribution network units. In addition, in terms of mutual assistance path planning and control, existing power mutual assistance methods for distribution network units usually take minimizing transmission loss as the single optimization objective, lacking sufficient consideration of line capacity constraints and voltage stability margins. Moreover, power control often adopts simple droop control without establishing a collaborative response mechanism between distribution network units, which can easily lead to operational risks such as line overload, voltage exceeding limits, or power distribution imbalance. Summary of the Invention

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

[0005] Therefore, this invention provides a method, system, device, and medium for power mutual assistance between distribution network units based on unit division to address the problems of existing power mutual assistance methods in distribution networks, which rely solely on a single power or voltage index for state assessment, fail to consider energy storage system state of charge data and flexible load regulation state data, prioritize minimizing transmission loss in mutual assistance path planning, ignore line capacity constraints and voltage stability margins, lack coordination in control strategies, and are prone to operational risks such as overload and voltage exceeding limits.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a method for power mutual assistance between distribution network units based on unit division, comprising: Real-time acquisition of operational data from each distribution network unit in the distribution network; Based on the operational data, surplus units and shortage units in the distribution network are identified, and the maximum support power of each surplus unit and the minimum required power of each shortage unit are calculated. Power mutual assistance path planning is performed on the surplus and shortage units to generate the optimal mutual assistance path; Based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path, a power support instruction set is generated from each surplus unit to the corresponding shortage unit through a supply and demand matching algorithm; According to the power support instruction set, the corresponding surplus units and shortage units are controlled to perform power mutual assistance operations through a cooperative control architecture. During the power mutual assistance operation, the operating status of the distribution network is monitored. When an abnormal operating status is detected, a power adjustment command is generated and executed based on the power support command set and the optimal mutual assistance path.

[0007] As a preferred embodiment of the power mutual assistance method between distribution network units based on unit division described in this invention, the step of identifying surplus units and shortage units in the distribution network includes: Collect the state-of-charge data of the energy storage system and the flexible load regulation status data of each distribution network unit in the distribution network; Based on the aforementioned operating data, calculate the power surplus and power shortage of each distribution network unit; Distribution network units with a power surplus exceeding a first threshold are identified as surplus units, and distribution network units with a power shortage exceeding a second threshold are identified as shortage units.

[0008] The beneficial effects of this preferred technical solution are as follows: by integrating multi-dimensional data such as energy storage state of charge data and flexible load regulation state data, a comprehensive distribution network unit state assessment system is constructed, which realizes the identification of surplus and shortage units, overcomes the limitations of traditional methods that rely on a single power index, provides a reliable basis for subsequent power mutual assistance, and improves the accuracy of state judgment and the reliability of mutual assistance decision-making.

[0009] As a preferred embodiment of the power mutual assistance method among distribution network units based on unit division as described in this invention, the step of calculating the maximum supportable power of each surplus unit and the minimum required power of each shortage unit includes: For the identified surplus cells, the maximum supportable power is calculated based on the power surplus and the state of charge data of the energy storage system. For the identified shortage units, the minimum required power is calculated based on the power shortage degree and in conjunction with the flexible load adjustment status data.

[0010] The beneficial effects of this preferred technical solution are as follows: based on the power balance assessment, it further integrates the state of charge data and flexible load adjustment data of the energy storage system, quantifies the support power of surplus units and the demand power of shortage units, and improves the accuracy and execution effect of power mutual assistance.

[0011] As a preferred embodiment of the power mutual assistance method between distribution network units based on unit division described in this invention, the step of generating the optimal mutual assistance path includes: Based on the maximum supportable power and the minimum required power, and under the conditions of satisfying line capacity constraints and voltage drop constraints, a mutual assistance path connecting each surplus unit and shortage unit is planned, and an optimal mutual assistance path connecting each surplus unit and shortage unit is generated.

[0012] The beneficial effects of this preferred technical solution are: by comprehensively considering line capacity constraints and voltage drop constraints in the mutual assistance path planning, it breaks through the limitations of the traditional approach that takes transmission loss as the sole objective, ensuring that the generated mutual assistance path can avoid line overload and voltage over-limit problems, and improving the safety and power supply reliability of the power mutual assistance process.

[0013] As a preferred embodiment of the power mutual assistance method between distribution network units based on unit division described in this invention, the step of generating a power support instruction set from each surplus unit to the corresponding shortage unit includes: Based on the maximum supportable power and the minimum required power, the surplus units and the shortage units are matched according to the optimal mutual assistance path to obtain the power value that each surplus unit should deliver to each shortage unit. Based on the power value, allocate the required support units to each surplus unit and generate a power support instruction set.

[0014] The beneficial effects of this preferred technical solution are as follows: by establishing a supply and demand matching mechanism, a power support instruction set is generated based on the actual power capacity of surplus and shortage units and the optimal mutual assistance path, thereby realizing the coordination and optimized configuration of power mutual assistance among distribution network units and effectively improving the economy and operating efficiency of power transmission.

[0015] As a preferred embodiment of the power mutual assistance method between distribution network units based on unit division described in this invention, the steps for performing the power mutual assistance operation include: Power control commands are issued to the surplus and shortage units through centralized control, based on the power support command set. Through a distributed control method, the power control command is executed locally in the surplus unit and the shortage unit to complete the power mutual assistance operation.

[0016] The beneficial effects of this preferred technical solution are as follows: Through a control architecture that combines centralized control and distributed control, the global optimality of power allocation commands is guaranteed, and rapid response and execution of local control are achieved. This effectively solves the problem that traditional single control methods cannot balance optimization and real-time stability, and improves the accuracy and operational reliability of power mutual assistance.

[0017] As a preferred embodiment of the power mutual assistance method between distribution network units based on unit division described in this invention, the step of generating and executing power adjustment instructions includes: When the abnormal operating state is that the line current exceeds the limit, the power value in the power control command is reduced according to the power support command set and the optimal mutual assistance path. When the abnormal operating state is that the node voltage exceeds the limit, the system switches to the backup mutual assistance path or adjusts the power value in the power control command according to the power support instruction set and the optimal mutual assistance path.

[0018] The beneficial effects of this preferred technical solution are as follows: it adopts differentiated adjustment strategies for different abnormal operating states, and through the adjustment mechanism that combines power reduction and path switching, it can quickly eliminate the risk of line overload and voltage exceeding limits, effectively prevent the expansion of abnormal conditions, and enhance the adaptability and operational safety of the power mutual assistance process.

[0019] Secondly, the present invention provides a power mutual assistance system between distribution network units based on unit division, comprising: The data acquisition module is configured to collect operational data from each distribution network unit in the distribution network in real time. The status assessment module is configured to identify surplus units and shortage units based on the operating data, and to calculate the maximum support power of each surplus unit and the minimum required power of each shortage unit. The path planning module is configured to perform power mutual assistance path planning for the surplus and shortage units and generate the optimal mutual assistance path. The instruction generation module is configured to generate a power support instruction set based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path. The control execution module is configured to control the corresponding surplus units and shortage units to perform power mutual assistance operations according to the power support instruction set; The safety adjustment module is configured to monitor the operating status of the distribution network during power mutual assistance and generate and execute power adjustment commands when an anomaly is detected.

[0020] Thirdly, the present invention provides an electronic device, comprising: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, they implement the steps of a power mutual assistance method between distribution network units based on unit partitioning.

[0021] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the steps of the power mutual assistance method between distribution network units based on unit partitioning.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: by constructing a multi-dimensional evaluation system of power, resources, and stability, it breaks through the limitations of traditional single-parameter evaluation; by adopting multi-constraint path optimization and centralized control methods in conjunction with distributed control methods, it achieves efficient power transmission and rapid response while ensuring line safety and voltage stability; and by combining real-time safety monitoring and adjustment mechanisms, it forms a complete closed-loop management of power mutual assistance, which improves the reliability of power supply, operational safety, and energy utilization efficiency of the distribution network. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall process of a power mutual assistance method between distribution network units based on unit division, according to an embodiment of the present invention. Detailed Implementation

[0025] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0026] Example 1, referring to Figure 1 As an embodiment of the present invention, a power mutual assistance method between distribution network units based on unit division is provided, comprising: S100: Real-time acquisition of operating data of each distribution network unit in the distribution network.

[0027] S200. Based on the operating data, identify the surplus units and shortage units in the distribution network, and calculate the maximum support power of each surplus unit and the minimum required power of each shortage unit.

[0028] S300: Perform power mutual assistance path planning on the surplus and shortage units to generate the optimal mutual assistance path.

[0029] S400. Based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path, a power support instruction set is generated from each surplus unit to the corresponding shortage unit through a supply and demand matching algorithm.

[0030] S500: According to the power support instruction set, control the corresponding surplus units and shortage units to perform power mutual assistance operations through the cooperative control architecture.

[0031] S600: During the power mutual assistance operation, monitor the operating status of the distribution network. When an abnormal operating status is detected, generate and execute a power adjustment command based on the power support command set and the optimal mutual assistance path.

[0032] It should be noted that with the large-scale access of distributed new energy sources and the diversification of load demand, each distribution network unit exhibits dynamic power imbalance characteristics and suffers from problems such as one-sided state assessment, single path planning, and lagging control response. Traditional operation modes are unable to achieve efficient power mutual assistance between distribution network units. At the same time, existing solutions mostly rely on single power indicators, do not integrate energy storage system state of charge data and flexible load adjustment state data, and lack multi-constraint path optimization and collaborative control mechanisms, leading to misjudgment of mutual assistance potential and prominent line safety risks, making it difficult to support the safe and economical operation of the distribution network.

[0033] Therefore, to address the issues of incomplete state assessment, lack of path safety constraints, and insufficient control coordination, the following steps from S100 to S600 are employed: first, multi-dimensional operational data is collected and a three-dimensional assessment system of power, resources, and stability is constructed to identify surplus and shortage units; then, the optimal mutual assistance path is generated, and power support commands are generated through a supply-demand matching algorithm; finally, centralized and distributed control methods are used to coordinate the execution of power mutual assistance, and adjustments are made in real time to achieve safe and efficient power mutual assistance among distribution network units, thereby improving power supply reliability and energy utilization efficiency.

[0034] Example 2, refer to Figure 1 As an embodiment of the present invention, based on the above embodiment, a power mutual assistance method between distribution network units based on unit division is provided.

[0035] In this application embodiment, taking a distribution network with a high proportion of distributed photovoltaic power in a high-tech zone of a city as the application scenario, the specific implementation of the steps for real-time collection of the operation data of each distribution network unit in the distribution network in S100 (A1~A3) is as follows: Collect the state-of-charge data of the energy storage system and the flexible load regulation data of each distribution network unit in the distribution network.

[0036] Specifically, the system collects real-time data on the state of charge of the energy storage system and the flexible load adjustment status, such as the load that can be shifted and the load that can be reduced, from the monitoring terminals of each distribution network unit, such as smart meters, energy storage controllers, or load controllers. The collection frequency is 10Hz. At the same time, it collects electrical quantity data such as voltage, current, active power, reactive power, and topology data such as line resistance, reactance, and rated capacity.

[0037] Taking distribution network unit A as an example: The state of charge data of the energy storage system was collected. Rated energy storage capacity The load that can be shifted This can reduce the load by Δ Distributed power generation real-time output Real-time load Rated load Minimum protection capacity for energy storage It is set at 20% of the rated energy storage capacity; Taking distribution network unit B as an example: the rated load is collected. =2MW, transferable load capacity =100kW, can reduce load Δ Real-time load Distributed power generation real-time output .

[0038] In an optional implementation, step S100 may further include a data preprocessing step, which involves: removing outliers from the collected running data, such as by using the 3σ rule, normalization, and data fusion, such as by using Kalman filtering to fuse multi-source data, thereby improving data quality and consistency.

[0039] In another optional implementation, step S100 may also include a communication status monitoring step, which is to monitor the communication delay and packet loss rate of the communication link for the operation data acquisition in real time. If the communication delay exceeds a delay threshold such as 100ms or the packet loss rate is greater than 5%, the operation data retransmission is triggered or the backup communication channel is switched to ensure the reliable acquisition and transmission of the operation data.

[0040] In this embodiment of the application, step S200, which involves calculating the maximum support power of each surplus unit and the minimum required power of each shortage unit, includes steps B1 to B3: B1. For the identified surplus units, calculate the maximum supportable power based on the power surplus and the state of charge data of the energy storage system.

[0041] Specifically, the power surplus is calculated based on distribution network unit A. : because The distribution network unit A is identified as a surplus unit.

[0042] Calculate available energy storage capacity : The maximum supported power is: in, For the available energy storage capacity, To the maximum supported power, To determine the duration of mutual assistance, set =0.5h, substitute into the calculation: B2. For the identified shortage units, calculate the minimum required power based on the power shortage degree and the flexible load adjustment status data.

[0043] Specifically, calculate the power shortage: because Identify distribution network unit B as a shortage unit and calculate the adjustable amount of flexible load. : The formula for calculating the minimum required power is: in, The adjustable amount of flexible load, Substitute the minimum required power into the calculation: The steps for identifying surplus and shortage units in the distribution network include B2.1 to B2.2: B2.1. Based on the aforementioned operating data, calculate the power surplus and power shortage of each distribution network unit.

[0044] Specifically, based on the collected operational data, the power surplus of each distribution network unit is calculated. and power shortage The formula is: in, Power margin For power shortage degree, Provide real-time power output for distributed power sources. For energy storage discharge power, For energy storage charging power, For real-time load, This is the rated load.

[0045] B2.2 Identify distribution network units with a power surplus exceeding the first threshold as surplus units, and identify distribution network units with a power shortage exceeding the second threshold as shortage units.

[0046] Specifically, the first threshold is set at 5%, and the second threshold at 3%. When the power margin... When identified as a surplus cell, when power shortage is It is identified as a shortage unit.

[0047] In an optional implementation, step S200 may further include a voltage stability margin assessment step, which involves calculating the voltage stability margin of each distribution network unit. ,when The time is marked as a voltage-vulnerable unit, and its power input is limited.

[0048] In another optional implementation, step S200 may also include a mutual assistance duration adjustment step, which involves: adjusting the duration Δt of power mutual assistance based on the state of charge of the energy storage system; when surplus units... And shortage of units When, set Hours to extend support time; when or When, set The time is shortened to a shorter mutual assistance cycle, enabling adaptive matching between the power mutual assistance duration and the system state.

[0049] In this embodiment of the application, step S300, the step of generating the optimal mutual assistance path, includes: Based on the maximum supportable power and the minimum required power, and under the conditions of satisfying line capacity constraints and voltage drop constraints, a mutual assistance path connecting each surplus unit and shortage unit is planned, and an optimal mutual assistance path connecting each surplus unit and shortage unit is generated.

[0050] Specifically, taking distribution network unit A (surplus unit) as an example... =2.7MW) to distribution network unit B (shortage unit, Taking power mutual assistance of 0.45MW as an example, based on the distribution network topology, a graph model G=(V,E) is established, where electrical nodes V represent each distribution network unit, and edges E represent connecting lines. Electrical parameters, including line resistance, are assigned to each edge in the graph. Reactance ; An improved Dijkstra algorithm is adopted, with the objective function F as follows: Among them, the constraints include the transmission loss formula. for: Response time for: Overload risk for: The weighting coefficients are: , , ,satisfy .

[0051] Line capacity constraints: ; Voltage drop constraint: ; in, Transmission loss value, For response time, This is the overload risk value. For line transmission power, Line voltage, Let J be the current in line j. For power factor, Due to line communication delay, The rated current of the line. Let be the reactive power transmitted by line j.

[0052] On the graph model G=(V,E), with distribution network unit A as the starting point and distribution network unit B as the ending point, the optimal mutual assistance path is obtained by searching the top 3 candidate paths that satisfy the constraints.

[0053] In an optional implementation, step S300 may further include a path risk assessment step: calculating the overload risk index for each candidate path. ,when If the value is greater than 0.2, the candidate path is excluded to ensure that the selected candidate path has sufficient safety margin.

[0054] In another optional implementation, step S300 may also include a multi-path backup step: planning and preparing two backup mutual aid paths for each shortage unit, and automatically switching to the backup mutual aid path when the main path is abnormal, thereby improving the reliability of power mutual aid.

[0055] In this embodiment of the application, step S400, which generates the power support instruction set from each surplus cell to the corresponding shortage cell, includes steps D1 to D2: D1. Based on the maximum supportable power and the minimum required power, the surplus units and the shortage units are matched according to the optimal mutual assistance path to obtain the power value that each surplus unit should deliver to each shortage unit.

[0056] Specifically, according to distribution network unit A =2.7MW, Distribution Network Unit B =0.45MW and the optimal mutual assistance path, the KM algorithm is used for supply and demand matching, and the supply and demand objective function is: in, , is the estimated cost of the optimal mutual aid path from surplus unit m to shortage unit n.

[0057] The matching constraints are: , The power that distribution network unit A should transmit to distribution network unit B is obtained by solving the problem. .

[0058] D2. Based on the power value, allocate the required support units to each surplus unit and generate a power support instruction set.

[0059] Specifically, based on the power value A structured power support instruction set is generated. The power support instruction set contains the following information: Supporting entity: Distribution network unit A; Recipient: Distribution network unit B; Support power: 0.45MW; Execution path: Determined optimal mutual assistance path; Timestamp: Instruction generation time; Effective duration: Mutual assistance duration. =0.5h.

[0060] In an optional implementation, step S400 may further include a transmission cost optimization step, which involves prioritizing the selection of... The surplus and shortage units corresponding to the path with the smallest value are matched to reduce the overall transmission cost and improve the economic efficiency of mutual assistance.

[0061] In another optional implementation, step S400 may further include a power allocation adjustment step, wherein when a surplus unit needs to supply power to multiple shortage units, the power allocation is adjusted according to the power distribution of each shortage unit. Proportionate allocation of the surplus unit This ensures fairness in power allocation and efficiency in resource utilization.

[0062] In this embodiment of the application, step S500, the step of performing power mutual assistance operation, includes E1~E2: E1. Through centralized control, power control commands are issued to the surplus unit and the shortage unit according to the power support command set.

[0063] Specifically, based on the support relationship determined in the power support instruction set (distribution network unit A → distribution network unit B, power value) =0.45MW), and power control commands are generated using model predictive control algorithms. For example, issuing a discharge command to distribution network unit A ; Issue power receiving command to distribution network unit B Instruction validity period: 0.5 hours; Power control commands are transmitted in real time to the local controllers of distribution network unit A and distribution network unit B via a power fiber optic network.

[0064] E2. Through distributed control, the power control command is executed locally in the surplus unit and the shortage unit to complete the power mutual assistance operation.

[0065] Specifically, after receiving the power control command, the local controllers of distribution network unit A and distribution network unit B execute the following respectively: Distribution network unit A (surplus unit): Based on the received data An improved droop control is adopted, and the control equation is: , ; Where f is the real-time operating frequency, For the rated frequency, Where P is the rated voltage, Q is the actual measured active power output, and n is the actual measured reactive power output. n = 0.03. This is the active power droop coefficient. This is the initial active power droop coefficient. ,Pick , This is a reactive power control command.

[0066] Distribution network unit B (shortage unit): According to Coordinate local flexible loads and energy storage systems, and prioritize the use of loads that can be moved.

[0067] Through the coordinated operation of the centralized control method and the distributed control method, 0.45MW of power is transferred from distribution network unit A to distribution network unit B, thus completing the power mutual assistance operation.

[0068] In an optional implementation, step S500 may further include a power point tracking correction step, which involves: real-time monitoring of the actual transmitted power. ,when At that time, adjustments are made through the centralized control layer. This value ensures accurate power transmission.

[0069] In another optional implementation, step S500 may also include a communication interruption emergency step, which is as follows: when a communication interruption is detected, the distributed control layer continues to execute according to the last received valid instruction, and at the same time fine-tunes the output power according to the local measurement value to maintain transient stability.

[0070] In this embodiment of the application, step S600, the step of generating and executing the power adjustment command, includes F1~F2: F1. When the abnormal operating state is that the line current exceeds the limit, the power value in the power control command is reduced according to the power support command set and the optimal mutual assistance path.

[0071] Specifically, when the line current on the mutual assistance path L1 (A→B) is detected... Exceeding the line rating The safety adjustment module is activated, based on the power values ​​in the power support instruction set. And the evaluation cost of the optimal mutual assistance path Reduce power proportionally. The reduction formula is: in, The adjusted new power support command value, The power support command value before adjustment. The reduction factor is positively correlated with the degree of path overload. For example, when the current exceeds the limit by 10%, it is set to... The power adjustment command is calculated. And immediately issue an update.

[0072] F2. When the abnormal operating state is that the node voltage exceeds the limit, switch to the backup mutual assistance path or adjust the power value in the power control command according to the power support instruction set and the optimal mutual assistance path.

[0073] Specifically, when the node voltage of distribution network unit B is detected to exceed the limit V, such as... At that time, the safety adjustment module is activated, querying the backup mutual assistance path planned for distribution network unit B in S300. If it exists and its assessed cost is... and If the power levels are similar, a power adjustment command for path switching is generated and executed. If no backup path is available, the power of the path with higher reactive power transmission is preferentially reduced according to the power support command set, such as calculating the reactive power ratio of the current path. ,like Then, a power adjustment command to reduce power is generated and executed.

[0074] In an optional implementation, step S600 may further include a graded load control step, wherein when the abnormality cannot be eliminated after power reduction, graded load control is initiated according to load priority, such as non-critical industrial load > commercial load, to ensure power supply to residents and critical loads.

[0075] In another optional implementation, step S600 may also include an adjustment effect evaluation step, which is as follows: after executing the power adjustment command, continuously monitor the line current and node voltage. If the current does not return to normal within a set time, such as 30 seconds, start a new round of adjustment until the abnormality is eliminated.

[0076] In summary, this invention provides a power mutual assistance method among distribution network units based on unit division. By collecting real-time operating data from each distribution network unit, surplus and shortage units are identified according to a three-dimensional power-resource-stability index system, and the maximum supportable power and minimum demand power are calculated. Then, an optimal mutual assistance path is generated; next, supply and demand are matched based on path evaluation costs, generating a power support instruction set; finally, power mutual assistance operations are executed through a collaborative control architecture using centralized and distributed control methods. Power is adjusted or paths are switched when line overload or voltage exceedance is detected, achieving safe and efficient power mutual assistance among distribution network units, improving the renewable energy absorption capacity and power supply reliability.

[0077] Example 3 illustrates a schematic scheme for a power mutual assistance method between distribution network units based on unit division. It should be noted that the technical solution of this power mutual assistance system based on unit division belongs to the same concept as the technical solution of the power mutual assistance method based on unit division described above. Details not described in detail in the technical solution of the power mutual assistance system based on unit division in this embodiment can be found in the description of the technical solution of the power mutual assistance method based on unit division described above.

[0078] This embodiment also provides a power mutual assistance system between distribution network units based on unit division, including: The data acquisition module is configured to collect operational data from each distribution network unit in the distribution network in real time. The status assessment module is configured to identify surplus units and shortage units based on the operating data, and to calculate the maximum support power of each surplus unit and the minimum required power of each shortage unit. The path planning module is configured to perform power mutual assistance path planning for the surplus and shortage units and generate the optimal mutual assistance path. The instruction generation module is configured to generate a power support instruction set based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path. The control execution module is configured to control the corresponding surplus units and shortage units to perform power mutual assistance operations according to the power support instruction set; The safety adjustment module is configured to monitor the operating status of the distribution network during power mutual assistance and generate and execute power adjustment commands when an anomaly is detected.

[0079] This embodiment also provides an electronic device applicable to the situation of power mutual assistance between distribution network units based on unit division, including: a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement the method for implementing power mutual assistance between distribution network units based on unit division as proposed in the above embodiment.

[0080] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the power mutual assistance method between distribution network units based on unit division as proposed in the above embodiments.

[0081] The storage medium proposed in this embodiment and the method for power mutual assistance between distribution network units based on unit division proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0082] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for power mutual assistance between distribution network units based on unit division, characterized in that, include: Real-time acquisition of operational data from each distribution network unit in the distribution network; Based on the operational data, surplus units and shortage units in the distribution network are identified, and the maximum support power of each surplus unit and the minimum required power of each shortage unit are calculated. Power mutual assistance path planning is performed on the surplus and shortage units to generate the optimal mutual assistance path; Based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path, a power support instruction set for each surplus unit to the corresponding shortage unit is generated through a supply and demand matching algorithm. According to the power support instruction set, the corresponding surplus units and shortage units are controlled to perform power mutual assistance operations through a cooperative control architecture. During the power mutual assistance operation, the operating status of the distribution network is monitored. When an abnormal operating status is detected, a power adjustment command is generated and executed based on the power support command set and the optimal mutual assistance path.

2. The power mutual assistance method between distribution network units based on unit division as described in claim 1, characterized in that, The steps for identifying surplus and shortage units in a distribution network include: Collect the state-of-charge data of the energy storage system and the flexible load regulation status data of each distribution network unit in the distribution network; Based on the aforementioned operating data, calculate the power surplus and power shortage of each distribution network unit; Distribution network units with a power surplus exceeding a first threshold are identified as surplus units, and distribution network units with a power shortage exceeding a second threshold are identified as shortage units.

3. The power mutual assistance method between distribution network units based on unit division as described in claim 2, characterized in that, The steps of calculating the maximum supportable power of each surplus unit and the minimum required power of each shortage unit include: For the identified surplus cells, the maximum supportable power is calculated based on the power surplus and the state of charge data of the energy storage system. For the identified shortage units, the minimum required power is calculated based on the power shortage degree and in conjunction with the flexible load adjustment status data.

4. The power mutual assistance method between distribution network units based on unit division as described in claim 3, characterized in that, The steps to generate the optimal mutual assistance path include: Based on the maximum supportable power and the minimum required power, and under the conditions of satisfying line capacity constraints and voltage drop constraints, a mutual assistance path connecting each surplus unit and shortage unit is planned, and an optimal mutual assistance path connecting each surplus unit and shortage unit is generated.

5. The power mutual assistance method between distribution network units based on unit division as described in claim 4, characterized in that, The steps for generating the power support instruction set from each surplus cell to the corresponding shortage cell include: Based on the maximum supportable power and the minimum required power, the surplus units and the shortage units are matched according to the optimal mutual assistance path to obtain the power value that each surplus unit should deliver to each shortage unit. Based on the power value, allocate the required support units to each surplus unit and generate a power support instruction set.

6. The power mutual assistance method between distribution network units based on unit division as described in claim 5, characterized in that, The steps for performing power exchange operation include: Power control commands are issued to the surplus and shortage units through centralized control, based on the power support command set. Through a distributed control method, the power control command is executed locally in the surplus unit and the shortage unit to complete the power mutual assistance operation.

7. The power mutual assistance method between distribution network units based on unit division as described in claim 6, characterized in that, The steps for generating and executing power adjustment instructions include: When the abnormal operating state is that the line current exceeds the limit, the power value in the power control command is reduced according to the power support command set and the optimal mutual assistance path. When the abnormal operating state is that the node voltage exceeds the limit, the system switches to the backup mutual assistance path or adjusts the power value in the power control command according to the power support instruction set and the optimal mutual assistance path.

8. A power mutual assistance system between distribution network units based on unit division, using the method described in any one of claims 1-7, characterized in that, include: The data acquisition module is configured to collect operational data from each distribution network unit in the distribution network in real time. The status assessment module is configured to identify surplus units and shortage units based on the operating data, and to calculate the maximum support power of each surplus unit and the minimum required power of each shortage unit. The path planning module is configured to perform power mutual assistance path planning for the surplus and shortage units and generate the optimal mutual assistance path. The instruction generation module is configured to generate a power support instruction set based on the maximum supportable power, the minimum required power, and the optimal mutual assistance path. The control execution module is configured to control the corresponding surplus units and shortage units to perform power mutual assistance operations according to the power support instruction set; The safety adjustment module is configured to monitor the operating status of the distribution network during power mutual assistance and generate and execute power adjustment commands when an anomaly is detected.

9. An electronic device, comprising: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, they implement the steps of the power mutual assistance method between distribution network units based on unit division as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the steps of the power mutual assistance method between distribution network units based on unit partitioning as described in any one of claims 1 to 7.

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