Power distribution network power supply and distribution system and method based on energy storage balance

Abstract

The invention provides a power distribution network power supply and distribution system and method based on energy storage balance. The method comprises the steps that real-time operation parameters of all nodes in an active power distribution network are collected; the real-time operation parameters comprise the real-time power generation power of the distributed power supply, the real-time electrical load power of the user side and the real-time charge state of the energy storage device; performing power supply simulation based on the real-time generated power, the real-time electrical load power and the real-time charge state, and determining an initial power supply scheme; the initial power supply scheme comprises initial power supply power of the distributed power supply and initial charging and discharging power of the energy storage device; after power supply is carried out according to the initial power supply scheme, stability evaluation is carried out based on the current charge state of the energy storage device and the voltage constraint condition and the current constraint condition of each node in the active power distribution network, and a final power supply scheme is determined; the final power supply scheme comprises the final power supply power of the distributed power supply and the final charging and discharging power of the energy storage device. According to the invention, efficient and stable operation of the power distribution network is realized.

Description

Technical Field

[0001] This invention relates to the field of computer technology, and in particular to a power distribution system and method for a power distribution network based on energy storage balance. Background Technology

[0002] Currently, traditional power distribution methods are mainly based on static planning and passive control strategies. In this approach, the power system supplies power according to a pre-set operating mode, transmitting electricity to users through substations, distribution lines, and other equipment. The power supply process relies on historical load power for capacity planning and network layout. During operation, when load fluctuations or distributed power generation occur, the system lacks effective adjustment mechanisms. For example, when distributed photovoltaic power generates a large amount of electricity during periods of abundant sunshine, traditional distribution networks struggle to quickly adjust power allocation, leading to underutilization of electrical energy and potentially causing problems such as localized voltage exceeding limits. Conversely, during peak electricity consumption periods, insufficient power supply capacity can easily lead to power shortages. Its main drawback is the lack of dynamic response capability to real-time system conditions, the inability to flexibly coordinate the relationship between distributed power sources, loads, and energy storage devices, and the difficulty in achieving efficient and stable operation of the distribution network. Summary of the Invention

[0003] This invention provides a power distribution system and method based on energy storage balance, aiming to achieve efficient and stable operation of the power distribution network.

[0004] In a first aspect, the present invention provides a power distribution method for a distribution network based on energy storage balance, comprising: Collect real-time operating parameters of each node in the active distribution network; real-time operating parameters include real-time generation power of distributed power sources, real-time power load on the user side, and real-time state of charge of energy storage devices; Based on the real-time power generation, the real-time power load, and the real-time state of charge, a power supply simulation is performed to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of the distributed power source and the initial charging and discharging power of the energy storage device; After supplying power using the initial power supply scheme, a stability assessment is performed based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme for the user side; the final power supply scheme includes the final power supply power of the distributed power source and the final charging and discharging power of the energy storage device.

[0005] Secondly, the present invention also provides a power distribution system based on energy storage balance, applied to the power distribution method based on energy storage balance as described in the first aspect; the power distribution system based on energy storage balance includes: The data acquisition module is used to collect real-time operating parameters of each node in the active distribution network. The real-time operating parameters include the real-time power generation of distributed power sources, the real-time power load of users, and the real-time state of charge of energy storage devices. The power supply simulation module is used to perform power supply simulation based on the real-time power generation, the real-time power load, and the real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of the distributed power source and the initial charging and discharging power of the energy storage device; The power supply and distribution optimization module is used to perform stability assessment based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network after power supply is provided according to the initial power supply scheme, and to determine the final power supply scheme on the user side; the final power supply scheme includes the final power supply power of the distributed power source and the final charging and discharging power of the energy storage device.

[0006] Thirdly, the present invention also provides an electronic device, comprising: a memory for storing computer software programs; and a processor for reading and executing the computer software programs, thereby realizing the power distribution method based on energy storage balance as described above.

[0007] Fourthly, the present invention also provides a non-transitory computer-readable storage medium storing a computer software program, which, when executed by a processor, implements the power distribution method based on energy storage balance as described above.

[0008] Fifthly, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the power distribution method based on energy storage balance as described above.

[0009] The power distribution method based on energy storage balance provided in this invention fully considers the interrelationships between distributed power sources, the user side, and energy storage devices when simulating the initial power supply scheme on the user side. It dynamically plans the power allocation of distributed power sources and energy storage devices according to actual conditions, achieving effective coordination between the two and ensuring the power supply balance of the active distribution network. Furthermore, it dynamically adjusts the active distribution network based on the simulation results and the voltage and current constraints of each node in the active distribution network, ensuring that the active distribution network can continuously adapt to various changes during operation and always maintain the power supply balance, thereby guaranteeing the efficient and stable operation of the distribution network. Attached Figure Description

[0010] Figure 1 This is a flowchart of a power distribution method for a power distribution network based on energy storage balance provided in an embodiment of the present invention; Figure 2 This is a structural diagram of a power distribution network system based on energy storage balance provided in an embodiment of the present invention; Figure 3 An embodiment diagram of the electronic device provided in this invention; Figure 4 An embodiment diagram of a computer-readable storage medium provided in accordance with the present invention. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0013] In the description of this invention, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this invention is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0014] Optional, see below Figure 1 , Figure 1 This is a flowchart of the power distribution method for a distribution network based on energy storage balance provided by the present invention. In this embodiment of the invention, the executing entity of the power distribution method for a distribution network based on energy storage balance is the power supply and distribution system. Therefore, the power distribution method for a distribution network based on energy storage balance includes: Step 10: Collect real-time operating parameters of each node in the active distribution network.

[0015] Optionally, in an active distribution network, to achieve efficient and stable power supply, it is necessary to collect real-time operating parameters of each node, mainly relying on various sensors and monitoring devices deployed in the distribution network. For distributed power sources, power sensors monitor their power generation in real time. These sensors can accurately measure the amount of electrical energy output by different types of distributed power sources (such as solar photovoltaic panels, wind turbines, etc.) at different times. On the user side, smart meters collect real-time power load data. Smart meters can record users' electricity consumption in real time and transmit the data to the data processing center. For energy storage devices, real-time state of charge (SOC) sensors or algorithms based on battery models are used to obtain the current power status of the energy storage device. Therefore, various sensors and monitoring devices transmit the collected data to the central control system through communication networks (such as fiber optics, wireless communication, etc.).

[0016] In one embodiment, a small-scale active distribution network exists, comprising one solar photovoltaic power station, two wind farms, 100 residential users, and one large commercial user, and is equipped with a lithium-ion battery energy storage device. Power sensors are installed at the collectors of each photovoltaic panel in the solar photovoltaic power station to monitor the power generation in real time; power sensors are also installed at the output of each wind farm to measure the power generation of the wind turbines; smart meters are installed for the 100 residential users and the large commercial user to collect their electricity load power in real time; for the lithium-ion battery energy storage device, its state of charge is calculated and acquired in real time through built-in sensors and a dedicated battery management system. Every 15 minutes, the data collected by all sensors is transmitted to the central control system of the distribution network via a 5G communication network, forming a real-time operating parameter dataset. For example, at a certain moment, the real-time power generation of the solar photovoltaic power station is 200kW, the power generation of the two wind power plants is 150kW and 120kW respectively, the total real-time power load of 100 residential users is 180kW, the real-time power load of large commercial users is 80kW, and the real-time state of charge of the lithium battery energy storage device is 60%.

[0017] Step 20: Based on real-time power generation, real-time power load, and real-time state of charge, perform power supply simulation to determine the initial power supply scheme on the user side. The initial power supply scheme includes the initial power supply of distributed power sources and the initial charging and discharging power of energy storage devices.

[0018] Furthermore, the power supply and distribution system conducts power supply simulations based on real-time power generation, real-time power load, and real-time state of charge. The purpose is to initially plan how distributed power sources and energy storage devices can work together to meet the electricity demand of users. Power supply simulations are typically based on mathematical models and optimization algorithms to achieve reasonable resource allocation. Through optimization algorithms, the initial power supply capacity of distributed power sources and the initial charging and discharging capacity of energy storage devices are determined while meeting user electricity demand, thus determining the initial power supply scheme for the user side, as detailed in steps 201 to 204.

[0019] Step 30: After supplying power using the initial power supply scheme, a stability assessment is performed based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme for the user side. The final power supply scheme includes the final power supply capacity of the distributed power source and the final charging and discharging capacity of the energy storage device.

[0020] Furthermore, after implementing the initial power supply scheme, it is necessary to assess the operational stability of the distribution network to ensure the reliability and safety of the power supply. This stability assessment primarily focuses on the current state of charge (SOC) of the energy storage device and the voltage and current constraints of each node. Therefore, the power supply and distribution system checks whether the SOC of the energy storage device is within a safe range after the initial power supply scheme is implemented, avoiding overcharging or over-discharging that could damage the battery. Secondly, based on the distribution network topology and electrical parameters, the voltage and current values ​​of each node under the current power supply scheme are calculated to determine whether the voltage constraints (e.g., node voltage must be maintained within ±5% of the rated voltage) and current constraints (e.g., line current cannot exceed the line's rated current carrying capacity) are met. If the assessment results indicate unstable factors, the initial power supply scheme is adjusted, and the final power supply capacity of the distributed generation and the final charging and discharging capacity of the energy storage device are redefined to form the final power supply scheme, ensuring the stable operation of the distribution network, as detailed in steps 301 to 305.

[0021] In simulating the initial power supply scheme on the user side, this invention fully considers the interrelationships between distributed power sources, the user side, and energy storage devices. It dynamically plans the power allocation of distributed power sources and energy storage devices based on actual conditions, achieving effective coordination between the two and ensuring the power supply and distribution balance of the active distribution network. Furthermore, based on the simulation results and the voltage and current constraints of each node in the active distribution network, dynamic adjustments are made to ensure that the active distribution network can continuously adapt to various changes during operation, always maintaining the power supply and distribution balance, and guaranteeing the efficient and stable operation of the distribution network.

[0022] In one embodiment, steps 201 to 204 are described as follows: Step 201: Determine the power difference based on real-time power generation and real-time power consumption, and determine the target state of charge range of the energy storage device based on the power difference and real-time state of charge.

[0023] Optionally, through real-time power generation With real-time power load Subtract them to calculate the power difference. This power difference reflects the supply and demand relationship between power generation and power consumption.

[0024] Furthermore, the power supply and distribution system determines the target state of charge range of the energy storage device based on the power difference and the real-time state of charge, as described in steps 2011 to 2015.

[0025] Step 202: Determine the basic power supply of the distributed power source based on the target state of charge range.

[0026] Furthermore, the power supply and distribution system determines the basic power supply capacity of the distributed power source based on the target state of charge range, as described in steps 2021 to 2023.

[0027] Step 203: Determine the initial charging and discharging power based on the power difference, the target state of charge range, and the base power supply.

[0028] Furthermore, the power supply and distribution system determines the initial charging and discharging power based on the power difference, the target state of charge range, and the base power supply, as described in steps 2031 to 2035.

[0029] Step 204: Adjust the base power supply based on the initial charge and discharge power to obtain the initial power supply.

[0030] Furthermore, when the energy storage device is charging, the initial power supply of the distributed power source is: Initial power supply = Base power supply + Initial charge / discharge power. When the energy storage device is discharging, the initial power supply of the distributed power source is: Initial power supply = Base power supply - Initial charge / discharge power.

[0031] In simulating the initial power supply scheme on the user side, the embodiments of the present invention fully consider the interrelationship between distributed power sources, the user side, and energy storage devices. Based on the actual situation, the power allocation of distributed power sources and energy storage devices is dynamically planned, achieving effective coordination between the two and ensuring the power supply and distribution balance of the active distribution network, thereby ensuring the efficient and stable operation of the distribution network.

[0032] In one embodiment, steps 2011 to 2015 are described as follows: Step 2011: If the power difference is greater than the first power threshold, then the power difference is determined to be within the first state of charge interval. The first state of charge interval includes a first sub-interval, a second sub-interval, and a third sub-interval. The power threshold for the first sub-interval is greater than the first power threshold and less than or equal to the second power threshold. The power threshold for the second sub-interval is greater than the second power threshold and less than or equal to the third power threshold. The power threshold for the third sub-interval is greater than all three power thresholds.

[0033] Optionally, a first power threshold can be set. In this embodiment of the invention, the first power threshold is 0. Therefore, when the power difference is greater than the first power threshold (i.e., greater than 0), the power difference is determined to be within the first state of charge interval. The first state of charge interval includes a first sub-interval, a second sub-interval, and a third sub-interval. The range of the first sub-interval is... The range of the second subinterval is The third subinterval .

[0034] Continuing in the small active distribution network, a first power threshold is set. =0, second power threshold =150kW, third power threshold =250kW. Real-time power generation is known. =470kW, real-time electrical load power =260kW, the calculated power difference =210kW. Since 210kW>0, the power difference is within the first state of charge range. Also, since 150kW<210kW 250kW, so It is located in the second sub-interval.

[0035] Step 2012: If the power difference is within the first sub-interval, determine whether the real-time state of charge is less than or equal to the first initial state of charge threshold.

[0036] Furthermore, two initial state-of-charge thresholds are set, the first initial state-of-charge threshold... Second initial state of charge threshold ,and < When the power difference is within the first sub-interval, the real-time state of charge of the energy storage device will be... and Compare and judge Is it less than or equal to? Based on this, the target state of charge range is further determined.

[0037] Continuing with the above-mentioned small-scale active distribution network, let the first initial state of charge threshold be set. =30%, second initial state of charge threshold =70%. The real-time state of charge of the lithium battery energy storage device is known. =60%, because 60% > 30%, further judgment is needed. and The relationship.

[0038] Step 2013: If yes, then the target state of charge interval is determined as the second sub-interval. If the real-time state of charge is greater than or equal to the second initial state of charge threshold, then the target state of charge interval is determined as the third sub-interval. If the real-time state of charge is greater than the first initial state of charge threshold and less than the second initial state of charge threshold, then the target state of charge interval is determined as the first sub-interval.

[0039] Furthermore, if Then the target charge state interval is determined as the second sub-interval; if Then the target charge state interval is determined as the third sub-interval; if < < Then, the target state of charge interval is determined as the first sub-interval, and the appropriate target state of charge interval for the energy storage device is accurately determined in order to balance the relationship between power generation and energy storage.

[0040] Continuing with the above embodiments, it is known that... =60%, =30%, =70%, since 30% < 60% < 70%, the target state of charge interval is determined as the first sub-interval. Assuming the state of charge range corresponding to the first sub-interval is [40%, 60%], this range is taken as the target state of charge interval.

[0041] Step 2014: If the rate difference is in the second sub-interval or the third sub-interval, then the target state of charge interval is determined to be the second sub-interval or the third sub-interval.

[0042] Furthermore, when the power difference is in the second or third sub-interval, the sub-interval where the power difference is located is directly determined as the target state of charge interval. This is because the power difference is relatively large in these two intervals. In order to make full use of the energy storage device to balance the power, it is set as the state of charge interval corresponding to the power difference to ensure power supply stability.

[0043] Continuing with the above embodiments, it has been determined in step 2011 that... Since it is in the second sub-interval, the target state of charge interval is directly determined as the state of charge range corresponding to the second sub-interval. Assuming the state of charge range corresponding to the second sub-interval is [60%, 80%], then this range is the target state of charge interval.

[0044] Step 2015: If the power difference is less than the first power threshold, then the power difference is determined to be within the second state of charge interval. Based on the power difference and the real-time state of charge, the target state of charge interval is determined to be the fourth, fifth, or sixth sub-interval within the second state of charge interval. The power threshold for the fourth sub-interval is greater than or equal to the fourth power threshold and less than the first power threshold. The power threshold for the fifth sub-interval is greater than or equal to the fifth power threshold and less than the fourth power threshold. The power threshold for the sixth sub-interval is less than the fifth power threshold.

[0045] Furthermore, when the power difference is less than the first power threshold, i.e., less than 0, the power difference is determined to be in the second state of charge interval, wherein the second state of charge interval includes the fourth sub-interval, the fifth sub-interval, and the sixth sub-interval.

[0046] In this embodiment of the invention, the range of the fourth sub-interval is: The range of the fifth subinterval is The sixth subinterval .

[0047] Furthermore, similarly to steps 2012 to 2014 above, two initial state of charge thresholds are set, the first initial state of charge threshold... Second initial state of charge threshold ,and < When the power difference is in the fourth sub-interval, the real-time state of charge of the energy storage device will be... and Compare and judge Is it less than or equal to? Based on this, the target state of charge range is further determined.

[0048] Furthermore, if Then the target charge state interval is determined as the fifth sub-interval; if Then the target charge state interval is determined as the sixth sub-interval; if < < Then, the target state of charge interval is determined as the fourth sub-interval, and the appropriate target state of charge interval for the energy storage device is accurately determined to balance the relationship between power generation and energy storage. Furthermore, when the power difference is in the fifth or sixth sub-interval, the sub-interval where the power difference is located is directly determined as the target state of charge interval.

[0049] Continuing with the above embodiments, let a fourth power threshold be set. =-10kW, fifth power threshold =-30kW. If at another moment, the real-time generating power in a small active distribution network... =300kW, real-time electrical load power =320kW, then the power difference =300-320=-20kW. Since -20kW<0, the power difference falls within the second state of charge range. Also, since -30kW<-20kW<-10kW, therefore... If the fifth sub-interval corresponds to a state of charge range of [20%, 40%], then this range is the target state of charge interval.

[0050] This invention, through setting multiple power thresholds and state-of-charge thresholds, matches different power generation-consumption relationships with energy storage states. This allows the target state-of-charge range of the energy storage device to be dynamically adjusted according to real-time operating conditions. For example, when power generation is much greater than the power load, the charging target range of the energy storage device is rationally planned to avoid overcharging; when power generation is insufficient, a suitable discharge range is determined to ensure power supply reliability. This effectively balances the relationship between power generation, power consumption, and energy storage in the active distribution network, improves the utilization efficiency of the energy storage device, enhances the distribution network's ability to cope with power fluctuations, and lays a solid foundation for the accurate determination of subsequent distributed power supply and energy storage device charging and discharging power, thereby achieving efficient and stable operation of the active distribution network.

[0051] In one embodiment, steps 2021 to 2023 are described as follows: Step 2021: If the target charge state interval is the first sub-interval, the second sub-interval, the fourth sub-interval, or the fifth sub-interval, then the basic power supply is determined to be the real-time power load.

[0052] Optionally, when the target state of charge interval is within the first, second, fourth, or fifth sub-interval, it means that the current power difference in the distribution network and the state of the energy storage device are in a relatively balanced or moderately fluctuating state. In this case, in order to prioritize the electricity demand of the user side and at the same time make reasonable use of the energy storage device for power regulation, the real-time power load is directly... Determined as the base power supply for distributed power sources This decision is based on a comprehensive consideration of stability and power reliability, ensuring that users' power supply is not affected, while reserving reasonable space for the charging and discharging regulation of energy storage devices.

[0053] Continuing with the above embodiment, after a certain calculation, the target state of charge interval is determined as the second sub-interval. Real-time power load. =260kW, determine the basic power supply capacity of the distributed power source. =260kW. This means that under this condition, the distributed power source prioritizes ensuring the user's 260kW power demand, while the energy storage device can perform charging and discharging operations as needed to further optimize power balance.

[0054] Step 2022: If the target state of charge interval is the third sub-interval, then the base power supply is determined to be the first difference between the real-time power load and the third power threshold.

[0055] Furthermore, when the target state of charge interval is the third sub-interval, it indicates a large power difference, meaning the generated power far exceeds the electrical load, and the energy storage device has ample room for charging. To fully utilize the excess generated power while avoiding overcharging of the energy storage device, the real-time electrical load power is calculated. With the third power threshold The difference determines the base power supply of the distributed power source. ,Right now = The power generated is deducted from the portion exceeding the third power threshold, and the remaining power is used as the basic power supply. The remaining excess power is used to charge the energy storage device, so as to achieve a reasonable allocation of resources.

[0056] Continuing in small active distribution networks, a third power threshold is set. =250kW, real-time power generation =470kW, real-time electrical load power =260kW, the target state-of-charge interval is determined as the third sub-interval. Base power supply: =260-(470-250)=260-220=40kW, indicating that in this state, the distributed power source only provides 40kW of basic power supply, and the remaining 470-40=430kW of power generation can be used to charge the energy storage device, which can not only meet the basic electricity needs of users, but also make efficient use of surplus power generation resources.

[0057] Step 2023: If the target state of charge interval is the sixth sub-interval, then the base power supply is determined to be the second difference between the real-time power load and the fifth power threshold.

[0058] Furthermore, when the target state of charge interval is the sixth sub-interval, it indicates that the power difference is negative and has a large absolute value, meaning that the generated power is much less than the electrical load, and the energy storage device needs to discharge a large amount to make up for the power gap. To rationally allocate the discharge of the energy storage device and the power supply of the distributed power source, the real-time electrical load power is calculated. With the fifth power threshold The difference determines the base power supply of the distributed power source. ,Right now = This indicates that, while meeting users' electricity needs, the power supply pressure on distributed power sources should be reduced, allowing energy storage devices to undertake more power replenishment tasks to ensure stable operation.

[0059] Continuing in small active distribution networks, a fifth power threshold is set. =10kW, real-time power generation =300kW, real-time electrical load power =320kW, and the target state-of-charge interval is determined to be the sixth sub-interval. Base power supply: =320-(320-10)=10kW, which means that in this state, the distributed power source only provides 10kW of basic power supply, and the remaining power gap of 320-10=310kW is supplemented by the discharge of the energy storage device, thereby maintaining power balance.

[0060] In this embodiment of the invention, during periods of relatively balanced or moderate power fluctuation (the first, second, fourth, and fifth sub-intervals), priority is given to ensuring user electricity demand and guaranteeing power supply reliability. In the third sub-interval, where power generation is excessive, the excess power is fully utilized to charge energy storage devices by precisely calculating the power difference, thereby improving energy efficiency. In the sixth sub-interval, where power generation is insufficient, the power supply tasks of distributed power sources and energy storage devices are rationally allocated to alleviate the power supply pressure on distributed power sources and ensure stable operation. Therefore, through a differentiated power allocation strategy, synergistic optimization between power generation, energy storage, and power consumption is achieved, effectively improving the overall operating efficiency and stability of the active distribution network and enhancing its ability to cope with complex power fluctuation scenarios.

[0061] In one embodiment, steps 2031 to 2035 are described as follows: Step 2031: If the target state of charge interval is the first sub-interval, then the initial charging and discharging power is determined to be the power difference - the second power threshold + the basic power supply.

[0062] Optionally, when the target state of charge interval is the first sub-interval, it indicates that the power difference is within a relatively small and controllable range, and the energy storage device is also in a moderate state of charge.

[0063] Furthermore, in order to rationally utilize the energy storage device to regulate power while meeting users' electricity needs, this embodiment of the invention determines the initial charging and discharging power of the energy storage device by calculating "power difference - second power threshold + basic power supply". The logic of this formula is to first subtract the second power threshold from the power difference to balance the power fluctuation, and then combine it with the basic power supply to obtain the charging and discharging power suitable for the current state of the energy storage device, so that the energy storage device can gradually adjust its state of charge to the target range while ensuring the stability of the power supply.

[0064] Continuing with the above embodiments, the target state of charge interval is the first sub-interval, and the base power supply determined in step 202 is... =260kW. Initial charge / discharge power: =210-150+260=320kW, which means that in this state, the energy storage device will charge at a power of 320kW (because the result is positive) to optimize power distribution and adjust its own state of charge.

[0065] Step 2032: If the target state of charge interval is the second sub-interval, then the initial charge and discharge power is determined as the power difference - the three power thresholds + the second power threshold + the basic power supply.

[0066] Furthermore, when the target state of charge (SOC) range falls within the second sub-range, it indicates a significant power difference, relatively abundant power generation, and ample adjustment space for the energy storage device. The formula "Power Difference - Third Power Threshold + Second Power Threshold + Base Power Supply" allows for finer adjustments to the power difference by introducing the third and second power thresholds. Combined with the base power supply, it calculates the initial charging and discharging power of the energy storage device. Its purpose is to fully utilize excess power generation while rationally controlling the charging and discharging rate of the energy storage device, avoiding overcharging or undercharging, and ensuring stable operation of the energy storage device within the target SOC range, thereby effectively balancing the power distribution network.

[0067] Continuing with the above embodiment, the target state of charge interval is the second sub-interval, and the base power supply is... =260kW. Initial charge / discharge power: =210-250+150+260=370kW, indicating that the energy storage device will be charged with a power of 370kW, maximizing the use of excess power generation to charge the energy storage device while meeting the user's electricity needs.

[0068] Step 2033: If the target state of charge interval is the third sub-interval or the sixth sub-interval, then the initial charging and discharging power is determined to be the power difference minus the base power supply.

[0069] Furthermore, when the target state of charge interval is the third sub-interval, the power generation is much greater than the power load, and the energy storage device can charge in large quantities; when it is the sixth sub-interval, the power generation is much less than the power load, and the energy storage device needs to discharge in large quantities. The initial charging and discharging power is calculated by "power difference - basic power supply". This formula takes the basic power supply as a benchmark and determines the scale of charging and discharging of the energy storage device according to the power difference, so that the energy storage device can ensure the stability of power supply for users under extreme power conditions, while reasonably adjusting its own state of charge.

[0070] Continuing with the above embodiments, for the third sub-interval case: the target state of charge interval is the third sub-interval, and the base power supply... =40kW. Initial charge / discharge power: =210-40=170kW, the energy storage device will be charged at a power of 170kW. For the sixth sub-interval: the target state of charge interval is the sixth sub-interval, and the base power supply... =10kW. Initial charge / discharge power: =-20-10=-30kW, the energy storage device will discharge at a power of 30kW.

[0071] Step 2034: If the target state of charge interval is the fourth sub-interval, then the initial charging and discharging power is determined as the power difference + the fourth power threshold - the basic power supply power.

[0072] Furthermore, when the target state of charge (SOC) range is the fourth sub-range, the power difference is small and the power generation is slightly lower than the load, or it is in a near-equilibrium state but requires fine-tuning by the energy storage device. The formula "Power Difference + Fourth Power Threshold - Base Power Supply" corrects the power difference by introducing the fourth power threshold and, combined with the base power supply, calculates the appropriate initial charging and discharging power for the energy storage device. Its function is to precisely control the charging and discharging of the energy storage device in this delicate power balance state, enabling it to quickly reach a stable state while maintaining the SOC of the energy storage device within the target range.

[0073] Continuing with the above embodiment, the target state of charge interval is the fourth sub-interval, and the base power supply is... =320kW. Initial charge / discharge power: =-20+30-320=-310kW. The energy storage device will discharge at a power of 310kW to make up for the insufficient power generation and ensure stable operation.

[0074] Step 2035: If the target state of charge interval is the fifth sub-interval, then the initial charge and discharge power is determined as the power difference + the fifth power threshold - the fourth power threshold - the basic power supply.

[0075] Furthermore, when the target state of charge (SOC) range is the fifth sub-range, the power difference narrows further, and power generation and consumption approach equilibrium, but fine-tuning by the energy storage device is still required. The formula "Power Difference + Fifth Power Threshold - Fourth Power Threshold - Base Supply Power" incorporates both the fifth and fourth power thresholds to finely adjust the power difference. Combined with the base supply power, the initial charging and discharging power of the energy storage device is calculated. This calculation method enables precise control of the charging and discharging operation of the energy storage device under such minor power differences, achieving accurate power balance and ensuring that the SOC of the energy storage device remains stable within the target range, thereby improving the stability and reliability of the distribution network operation.

[0076] Continuing with the above embodiment, the target state of charge interval is the fifth sub-interval, and the base power supply is... =315kW. Initial charge / discharge power: =-5+10-30-315=-340kW, the energy storage device will discharge at a power of 340kW to fine-tune the power balance.

[0077] This invention achieves precise control of the charging and discharging power of energy storage devices through differentiated calculation formulas. At each stage of power fluctuation, whether there is overcapacity, undercapacity, or near-balance in power generation, the charging and discharging tasks of the energy storage devices can be rationally arranged based on real-time conditions. This effectively balances the power distribution network, improves the utilization efficiency of the energy storage devices, avoids damage to the devices from overcharging and discharging, ensures the stability and reliability of power supply to the user side, and optimizes the collaborative working mode between distributed power sources and energy storage devices. This enhances the ability of the active distribution network to cope with complex operating conditions and achieves stable operation.

[0078] In one embodiment, steps 301 to 305 are described as follows: Step 301: Based on the rated capacity of the energy storage device, combined with the initial charging and discharging power and the power supply time, determine the change in state of charge, and based on the change in state of charge and the real-time state of charge, determine the current state of charge of the energy storage device after the execution of the initial power supply scheme.

[0079] Optionally, based on the rated capacity of the energy storage device Initial charge and discharge power and power supply time Calculate the change in state of charge. When the energy storage device is charging, When the energy storage device discharges, ,in, For charging efficiency, For discharge efficiency. Then, the change in state of charge is compared with the real-time state of charge. By adding them together, we obtain the current state of charge of the energy storage device after the initial power supply scheme has been executed. ,Right now .

[0080] Continuing in small-scale active distribution networks, the rated capacity of lithium battery energy storage devices... =500kWh, charging efficiency =90%, discharge efficiency =90%. Initial charging power is known. =320kW (calculation result in step 20), power supply time =1h. Calculate the change in state of charge: =0.576=57.6%, Real-time state of charge If the charge level is 60%, then the current state of charge after implementing the initial power supply scheme is: =117.6% (In reality, it should not exceed 100%; this is just a calculation demonstration).

[0081] Step 302: Based on the reference voltage of each node in the distribution network and the first active power, first reactive power, resistance and reactance of the line between it and the connected node, determine the voltage deviation of each node, and based on the line rated current, second active power, second reactive power and the voltage at both ends of each transmission line in the distribution network, determine the current margin of each transmission line.

[0082] Furthermore, based on the principles of power flow calculation in distribution networks, the Newton-Raphson method is adopted. Let the nodes... The reference voltage is , and its connected nodes The resistance of the line between them is Reactance is The first active power transmitted is The first reactive power is .node voltage offset The calculation formula is: .

[0083] Furthermore, each transmission route The rated current of the line is The second active power transmitted is The second reactive power is The voltages at both ends are respectively Each transmission route Current margin for: .

[0084] Continuing in a small active distribution network, the reference voltage of node A... =10kV, the line resistance of its connected node B =0.5 Reactance =1 The first active power transmitted =100kW, first reactive power =50kvar. Voltage offset at node A: =10kV. Rated current of a certain transmission line. =200A, the second active power transmitted =300kW, second reactive power =150kvar, voltage at one end =10kV. Calculate the actual current: 181.97A.

[0085] Step 303: Determine the power supply range based on the voltage offset of each node and the current margin of each transmission line.

[0086] Furthermore, the power supply and distribution system determines the power supply range based on the voltage offset of each node and the current margin of each transmission line, as described in steps 3031 to 3034.

[0087] Step 304: Determine the first power adjustment amount of the distributed power source based on the power supply interval and the current state of charge, and determine the second power adjustment amount of the energy storage device based on the power supply adjustment amount.

[0088] Furthermore, the power supply and distribution system determines the first power adjustment amount of the distributed power source based on the power supply section and the current state of charge, as described in steps 3041 to 3044.

[0089] Furthermore, based on the power adjustment amount of distributed power sources and the power balance principle of the distribution network, the energy storage device has a second power adjustment amount. =-First power adjustment amount .

[0090] Step 305: Adjust the initial power supply based on the first power adjustment amount to obtain the final power supply, and adjust the initial charge / discharge power based on the second power adjustment amount to obtain the final charge / discharge power.

[0091] Furthermore, adjust the first power amount With initial power supply Adding them together gives the final power output of the distributed power source. ,Right now = + Adjust the second power amount With initial charge and discharge power Adding them together gives the final charge and discharge power of the energy storage device. ,Right now .

[0092] In one embodiment, the initial power supply is known. =280kW, first power adjustment amount =30kW, then the final power supply of the distributed power source is: =280 + 30 = 310kW. Initial charge / discharge power. =120kW, second power adjustment amount =-30kW, then the final charging and discharging power of the energy storage device is: =120-30=90kW.

[0093] This invention considers various constraints and dynamic factors during the operation of the distribution network, comprehensively evaluating and optimizing it from multiple dimensions such as energy storage device power management, node voltage stability, and line current safety. Therefore, by determining reasonable power supply intervals and precisely adjusting the power of distributed power sources and energy storage devices, it ensures that the distribution network meets voltage and current constraints under various operating conditions, effectively avoiding problems such as overvoltage, undervoltage, and line overload, significantly improving the operational stability and reliability of the distribution network. Simultaneously, it can also dynamically optimize based on load changes and energy storage status, achieving efficient operation of the active distribution network.

[0094] In one embodiment, steps 3031 to 3034 are described as follows: Step 3031: If the voltage offset of each node is less than or equal to the preset maximum voltage offset, and the current margin of each transmission line is greater than or equal to the preset minimum current margin, then the power supply section is determined as the first power supply section.

[0095] Optionally, in an active distribution network, a maximum voltage offset and a minimum current margin are pre-set as key thresholds for stable operation. The voltage offset of each node and the current margin of each transmission line are calculated and compared with these preset thresholds. When the voltage offset of all nodes does not exceed the preset maximum voltage offset, and the current margin of all transmission lines is not lower than the preset minimum current margin, the distribution network is considered to be in a good and stable operating state. At this point, a pre-defined first power supply interval suitable for stable operating conditions is determined as the current power supply interval. This first power supply interval typically covers a reasonable range of distributed power generation and energy storage device charging / discharging power to maintain efficient operation under stable conditions.

[0096] Step 3032: If the voltage offset of each node is greater than the preset maximum voltage offset and the current margin of each transmission line is greater than or equal to the preset minimum current margin, then the power supply section is determined as the second power supply section.

[0097] Furthermore, when the voltage deviation of all nodes in the distribution network exceeds the preset maximum voltage deviation, but the current margin of the transmission line can still be maintained at a level not lower than the preset minimum current margin, it indicates that the main problem is voltage instability, while the line current-carrying capacity can still meet the requirements. To cope with excessively high or low voltage, the power supply strategy needs to be adjusted. In this case, the second power supply section is determined as the current power supply section. The second power supply section is optimized for voltage issues by adjusting the power supply of distributed power sources and the charging and discharging power of energy storage devices to improve the node voltage conditions and restore the voltage to a reasonable range.

[0098] Step 3033: If the voltage offset of each node is less than or equal to the preset maximum voltage offset, and the current margin of each transmission line is less than the preset minimum current margin, then the power supply section is determined to be the third power supply section.

[0099] Furthermore, if the voltage deviation of all nodes is within a reasonable range (less than or equal to the preset maximum voltage deviation), but the current margin of some or all transmission lines is lower than the preset minimum current margin, it indicates that there is a risk of line overload in the distribution network, while the voltage condition is relatively stable. To avoid line damage due to excessive current and ensure safe operation, the third power supply section is designated as the current power supply section. The third power supply section focuses on current limiting by adjusting the power of distributed power sources and energy storage devices to reduce line current and ensure it remains within the safe current-carrying capacity range.

[0100] Step 3034: If the voltage offset of each node is greater than the preset maximum voltage offset and the current margin of each transmission line is less than the preset minimum current margin, then the power supply section is determined to be the fourth power supply section.

[0101] Furthermore, when the voltage deviation of all nodes in the distribution network exceeds the preset maximum voltage deviation, and the current margin of all transmission lines is lower than the preset minimum current margin, it indicates a severe dual problem of voltage instability and line overload. In this case, a more stringent power supply strategy adjustment is required, designating the fourth power supply section as the current power supply section. This fourth power supply section is designed for extremely unstable operating conditions. By significantly adjusting the power output of distributed power sources and the charging and discharging power of energy storage devices, priority is given to ensuring the basic stability and safe operation of the system, gradually alleviating voltage and current problems.

[0102] This invention enables rapid matching of appropriate power supply sections based on the actual state of voltage stability and line current safety. When stable, the first power supply section maintains efficient operation; when facing a single voltage or current problem, the second and third power supply sections are used to specifically optimize the voltage or current; when facing both voltage and current crises, the fourth power supply section is used to implement emergency adjustment strategies. Therefore, this hierarchical and categorized power supply section determination method effectively balances the voltage stability and current safety requirements during distribution network operation, avoiding faults caused by voltage anomalies or line overloads, significantly improving the stability, reliability, and safety of active distribution network operation, and providing a solid foundation for precise adjustments to subsequent power supply schemes, ensuring the quality of power supply on the user side and the stable operation of the overall distribution network.

[0103] In one embodiment, steps 3041 to 3044 are described as follows: Step 3041, if the power supply interval is the first power supply interval, for the current state of charge less than or equal to the first target state of charge threshold, determine the first power adjustment amount as: (change in state of charge / power supply time) * rated capacity. For the current state of charge greater than or equal to the second target state of charge threshold, determine the first power adjustment amount as: -(change in state of charge / power supply time) * rated capacity. If for the current state of charge is greater than the first target state of charge threshold and less than the second target state of charge threshold, determine the first power adjustment amount as: k * (initial power supply power - real-time power consumption load power). k is a preset fine-tuning coefficient.

[0104] Optionally, when the power supply interval is the first power supply interval, it indicates that the distribution network is in a stable operation state. At this time, according to the current state of charge of the energy storage device and the preset first target state of charge threshold , second target state of charge threshold (and < ), determine the first power adjustment amount of the distributed power source in three cases .

[0105] If , it means that the energy storage device has a low power level. To increase its state of charge, calculate the first power adjustment amount through the formula , which determines the additional power generation required to charge the energy storage device by using the change in state of charge , power supply time ( ) and the rated capacity of the energy storage device ( ).

[0106] If , it indicates that the energy storage device has a high power level. To avoid overcharging, use the formula to limit the charging of the energy storage device by reducing the power generation.

[0107] If < < , then use the formula = k * , where k is a preset fine-tuning coefficient (0 < k < 1), and this formula makes fine-tuning based on the difference between the initial power supply power and the real-time power consumption load power to maintain the power balance of the system and the stability of the state of charge of the energy storage device.

[0108] Continuing with the above embodiment, the first target state of charge threshold = 30%, the second target state of charge threshold = 70%, the rated capacity of the energy storage device = 500 kWh, the power supply time =1h, preset fine-tuning coefficient k=0.2. Initial power supply. =280kW, real-time electrical load power =260kW, change in state of charge =20%, calculate the current state of charge. =65%. Because 30% < 65% < 70%, the first power adjustment amount is calculated according to the formula: =4kW.

[0109] Step 3042: If the power supply interval is the second power supply interval, then the first power adjustment amount is determined as: -(voltage offset of each node / preset maximum voltage offset) * initial power supply.

[0110] Furthermore, when the power supply section is the second power supply section, it means that the distribution network has voltage instability issues, but the current margin is within a safe range. To improve the voltage situation, the following formula can be used: Calculate the first power adjustment amount ( ).in, This is the sum of the voltage offsets at all nodes. For the number of nodes, This is the preset maximum voltage offset. The formula adjusts the node voltage by comparing the voltage offset of each node with the preset maximum voltage offset, based on the initial power supply. By changing the power supply of distributed generation, it affects the power flow distribution and regulates the node voltage.

[0111] Continue with 3 nodes in a small active distribution network, with a preset maximum voltage offset. =0.5kV, initial power supply =300kW. Node A voltage offset =0.6kV, Node B voltage offset =0.7kV, voltage offset at node C =0.8kV, then -420kW.

[0112] Step 3043: If the power supply interval is the third power supply interval, then the first power adjustment amount is determined as: (current margin of each transmission line / preset minimum current margin) * initial power supply power.

[0113] Furthermore, when the power supply section is the third power supply section, it indicates that the distribution network faces the risk of line overload, while the voltage is within a stable range. To reduce the line current, the formula is used... Calculate the first power adjustment amount ( ).in, This is the sum of the current margins of all transmission lines. For the number of transmission routes, This is a preset minimum current margin. The formula is adjusted based on the relationship between the current margin of each transmission line and the preset minimum current margin, using the initial power supply as a benchmark. By reducing the power supply of distributed power sources, it ensures that the power supply is within a safe range.

[0114] In a small active distribution network, there are two transmission routes, with a preset minimum current margin. =50A, initial power supply =250kW. Transmission route L1 current margin =40A, transmission route L2 current margin =35A, then s first power adjustment amount =187.5kW.

[0115] Step 3044: If the power supply interval is the fourth power supply interval, then the first power adjustment amount is determined as: - (voltage offset of each node / preset maximum voltage offset) * initial power supply power + (current margin of each transmission line / preset minimum current margin) * initial power supply power.

[0116] Furthermore, when the power supply section is the fourth power supply section, it faces problems of voltage instability and line overload. The first power adjustment amount is = -(voltage offset of each node / preset maximum voltage offset) * initial power supply + (current margin of each transmission line / preset minimum current margin) * initial power supply.

[0117] This invention employs differentiated power adjustment strategies for different operating states of the distribution network (stability, voltage issues, current issues, and dual voltage and current issues). In stable conditions, the power generation is precisely adjusted based on the state of charge of the energy storage devices to maintain a reasonable power level. When a single voltage or current issue occurs, the power supply of distributed generation sources is adjusted based on voltage deviation or current margin to effectively improve voltage conditions or reduce line overload risks. When facing both voltage and current crises, power is adjusted by comprehensively considering both factors to achieve synergistic optimization of multiple issues. Therefore, through scenario-specific power adjustment mechanisms, the system can quickly respond to changes in the operating state of the distribution network, dynamically optimize the power supply of distributed generation sources, enhance the distribution network's adaptability to complex operating conditions, ensure voltage stability and current safety, improve power supply reliability and energy utilization efficiency, and achieve efficient and stable operation of the active distribution network.

[0118] Furthermore, the distribution network power supply and distribution system based on energy storage balance provided by the present invention will be described below. The distribution network power supply and distribution system based on energy storage balance described below can be referred to in correspondence with the distribution network power supply and distribution method based on energy storage balance described above.

[0119] Optional, refer to Figure 2 , Figure 2This is a structural diagram of the power distribution system based on energy storage balance provided by the present invention. The power distribution system based on energy storage balance includes: The data acquisition module 210 is used to collect real-time operating parameters of each node in the active distribution network; the real-time operating parameters include the real-time power generation of distributed power sources, the real-time power consumption load of users, and the real-time state of charge of energy storage devices. The power supply simulation module 220 is used to perform power supply simulation based on real-time power generation, real-time power load and real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of distributed power sources and the initial charging and discharging power of energy storage devices; The power supply and distribution optimization module 230 is used to perform stability assessment based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network after power supply is provided with the initial power supply scheme, and to determine the final power supply scheme on the user side; the final power supply scheme includes the final power supply power of the distributed power source and the final charging and discharging power of the energy storage device.

[0120] In simulating the initial power supply scheme on the user side, this invention fully considers the interrelationships between distributed power sources, the user side, and energy storage devices. It dynamically plans the power allocation of distributed power sources and energy storage devices based on actual conditions, achieving effective coordination between the two and ensuring the power supply and distribution balance of the active distribution network. Furthermore, based on the simulation results and the voltage and current constraints of each node in the active distribution network, dynamic adjustments are made to ensure that the active distribution network can continuously adapt to various changes during operation, always maintaining the power supply and distribution balance, and guaranteeing the efficient and stable operation of the distribution network.

[0121] See also Figure 3 , Figure 3 An embodiment diagram of an electronic device provided in accordance with the present invention. For example... Figure 3 As shown, this embodiment of the invention provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor 320. When the processor 320 executes the computer program 311, it performs the following steps: Collect real-time operating parameters of each node in the active distribution network; real-time operating parameters include real-time generation power of distributed power sources, real-time power load on the user side, and real-time state of charge of energy storage devices; Power supply simulation is performed based on real-time power generation, real-time power load, and real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of distributed power sources and the initial charging and discharging power of energy storage devices. After supplying power using the initial power supply scheme, a stability assessment is conducted based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme for the user side. The final power supply scheme includes the final power supply capacity of the distributed power source and the final charging and discharging capacity of the energy storage device.

[0122] See also Figure 4 , Figure 4 An embodiment diagram of a computer-readable storage medium provided in accordance with an embodiment of the present invention is shown. Figure 4 As shown, this embodiment provides a computer-readable storage medium 400 on which a computer program 311 is stored. When the computer program 311 is executed by a processor, it performs the following steps: Collect real-time operating parameters of each node in the active distribution network; real-time operating parameters include real-time generation power of distributed power sources, real-time power load on the user side, and real-time state of charge of energy storage devices; Power supply simulation is performed based on real-time power generation, real-time power load, and real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of distributed power sources and the initial charging and discharging power of energy storage devices. After supplying power using the initial power supply scheme, a stability assessment is conducted based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme for the user side. The final power supply scheme includes the final power supply capacity of the distributed power source and the final charging and discharging capacity of the energy storage device.

[0123] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the power distribution method based on energy storage balance provided by the above methods, the method comprising: Collect real-time operating parameters of each node in the active distribution network; real-time operating parameters include real-time generation power of distributed power sources, real-time power load on the user side, and real-time state of charge of energy storage devices; Power supply simulation is performed based on real-time power generation, real-time power load, and real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of distributed power sources and the initial charging and discharging power of energy storage devices. After supplying power using the initial power supply scheme, a stability assessment is conducted based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme for the user side. The final power supply scheme includes the final power supply capacity of the distributed power source and the final charging and discharging capacity of the energy storage device.

[0124] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0125] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence 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 ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power distribution method for a distribution network based on energy storage balance, characterized in that, include: Collect real-time operating parameters of each node in the active distribution network; real-time operating parameters include real-time generation power of distributed power sources, real-time power load on the user side, and real-time state of charge of energy storage devices; Based on the real-time power generation, the real-time power load, and the real-time state of charge, a power supply simulation is performed to determine the initial power supply scheme on the user side. The initial power supply scheme includes the initial power supply of the distributed power source and the initial charging and discharging power of the energy storage device; After supplying power using the initial power supply scheme, a stability assessment is performed based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network to determine the final power supply scheme on the user side. The final power supply scheme includes the final power supply of the distributed power source and the final charging and discharging power of the energy storage device.

2. The power distribution method for a distribution network based on energy storage balance according to claim 1, characterized in that, The process of simulating power supply based on the real-time power generation, the real-time power load, and the real-time state of charge to determine the initial power supply scheme on the user side includes: The power difference is determined based on the real-time power generation and the real-time power load, and the target state of charge range of the energy storage device is determined based on the power difference and the real-time state of charge. The base power supply of the distributed power source is determined based on the target state of charge range; The initial charging and discharging power is determined based on the power difference, the target state of charge range, and the base power supply. The base power supply is adjusted based on the initial charge and discharge power to obtain the initial power supply.

3. The power distribution method for a distribution network based on energy storage balance according to claim 2, characterized in that, Determining the target state of charge range of the energy storage device based on the power difference and the real-time state of charge includes: If the power difference is greater than a first power threshold, then the power difference is determined to be in a first state of charge interval; the first state of charge interval includes a first sub-interval, a second sub-interval, and a third sub-interval; the power threshold of the first sub-interval is greater than the first power threshold and less than or equal to the second power threshold; the power threshold of the second sub-interval is greater than the second power threshold and less than or equal to the third power threshold; the power threshold of the third sub-interval is greater than all three power thresholds. If the power difference is within the first sub-interval, then determine whether the real-time state of charge is less than or equal to the first initial state of charge threshold. If so, the target state of charge interval is determined as the second sub-interval; if the real-time state of charge is greater than or equal to the second initial state of charge threshold, the target state of charge interval is determined as the third sub-interval; if the real-time state of charge is greater than the first initial state of charge threshold and less than the second initial state of charge threshold, the target state of charge interval is determined as the first sub-interval. If the rate difference value is within the second sub-interval or the third sub-interval, then the target state of charge interval is determined to be the second sub-interval or the third sub-interval; If the power difference is less than the first power threshold, the power difference is determined to be in the second state of charge interval. Based on the power difference and the real-time state of charge, the target state of charge interval is determined to be the fourth, fifth, or sixth sub-interval in the second state of charge interval. The power threshold of the fourth sub-interval is greater than or equal to the fourth power threshold and less than the first power threshold. The power threshold of the fifth sub-interval is greater than or equal to the fifth power threshold and less than the fourth power threshold. The power threshold of the sixth sub-interval is less than the fifth power threshold.

4. The power distribution method for a distribution network based on energy storage balance according to claim 3, characterized in that, Determining the base power supply of the distributed power source based on the target state of charge range includes: If the target state of charge interval is the first sub-interval, the second sub-interval, the fourth sub-interval, or the fifth sub-interval, then the basic power supply is determined to be the real-time power load power. If the target state of charge interval is the third sub-interval, then the basic power supply is determined to be the first difference between the real-time power load power and the third power threshold. If the target state of charge interval is the sixth sub-interval, then the base power supply is determined to be the second difference between the real-time power load power and the fifth power threshold.

5. The power distribution method for a distribution network based on energy storage balance according to claim 3, characterized in that, The determination of the initial charge / discharge power based on the power difference, the target state of charge range, and the base power supply includes: If the target state of charge interval is the first sub-interval, then the initial charge and discharge power is determined to be the power difference - the second power threshold + the base power supply. If the target state of charge interval is the second sub-interval, then the initial charge and discharge power is determined to be the power difference - three power thresholds + second power threshold + basic power supply. If the target state of charge interval is the third sub-interval or the sixth sub-interval, then the initial charge and discharge power is determined to be the power difference - the base power supply. If the target state of charge interval is the fourth sub-interval, then the initial charge and discharge power is determined to be the power difference + the fourth power threshold - the base power supply. If the target state of charge interval is the fifth sub-interval, then the initial charge / discharge power is determined to be the power difference + the fifth power threshold - the fourth power threshold - the base power supply.

6. The power distribution method for a distribution network based on energy storage balance according to any one of claims 1 to 5, characterized in that, The stability assessment based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network is used to determine the final power supply scheme on the user side, including: Based on the rated capacity of the energy storage device, combined with the initial charge and discharge power and power supply time, the change in state of charge is determined, and based on the change in state of charge and the real-time state of charge, the current state of charge of the energy storage device after the execution of the initial power supply scheme is determined. Based on the reference voltage of each node in the distribution network, combined with the first active power, first reactive power, resistance and reactance of the lines between it and the connected nodes, the voltage deviation of each node is determined, and based on the line rated current, second active power, second reactive power and the voltage at both ends of each transmission line in the distribution network, the current margin of each transmission line is determined. The power supply range is determined based on the voltage offset of each node and the current margin of each transmission line; The first power adjustment amount of the distributed power source is determined based on the power supply range and the current state of charge, and the second power adjustment amount of the energy storage device is determined based on the power supply adjustment amount. The initial power supply is adjusted based on the first power adjustment amount to obtain the final power supply, and the initial charge / discharge power is adjusted based on the second power adjustment amount to obtain the final charge / discharge power.

7. The power distribution method for a distribution network based on energy storage balance according to claim 6, characterized in that, The power supply range is determined based on the voltage offset of each node and the current margin of each transmission line, including: If the voltage offset of each node is less than or equal to the preset maximum voltage offset, and the current margin of each transmission line is greater than or equal to the preset minimum current margin, then the power supply section is determined as the first power supply section. If the voltage offset of each node is greater than the preset maximum voltage offset, and the current margin of each transmission line is greater than or equal to the preset minimum current margin, then the power supply section is determined as the second power supply section. If the voltage offset of each node is less than or equal to the preset maximum voltage offset, and the current margin of each transmission line is less than the preset minimum current margin, then the power supply section is determined to be the third power supply section. If the voltage offset of each node is greater than the preset maximum voltage offset, and the current margin of each transmission line is less than the preset minimum current margin, then the power supply section is determined to be the fourth power supply section.

8. The power distribution method for a distribution network based on energy storage balance according to claim 7, characterized in that, Determining the first power adjustment amount of the distributed power source based on the power supply interval and the current state of charge includes: If the power supply interval is the first power supply interval, for the current state of charge (SBC) less than or equal to the first target SBC threshold, the first power adjustment amount is determined to be: (SBC change / power supply time) * rated capacity; for the current SBC greater than or equal to the second target SBC threshold, the first power adjustment amount is determined to be: -(SBC change / power supply time) * rated capacity; if the current SBC is greater than the first target SBC threshold and less than the second target SBC threshold, the first power adjustment amount is determined to be: k * (initial power supply - real-time power load); k is a preset fine-tuning coefficient. If the power supply interval is the second power supply interval, then the first power adjustment amount is determined as: -(voltage offset of each node / preset maximum voltage offset) * initial power supply; If the power supply interval is the third power supply interval, then the first power adjustment amount is determined as: (current margin of each transmission line / preset minimum current margin) * initial power supply power; If the power supply interval is the fourth power supply interval, then the first power adjustment amount is determined as: -(voltage offset of each node / preset maximum voltage offset) * initial power supply power + (current margin of each transmission line / preset minimum current margin) * initial power supply power.

9. A power distribution system based on energy storage balance, characterized in that, The method for power distribution in a distribution network based on energy storage balance, as described in any one of claims 1 to 8, is applied; the power distribution system based on energy storage balance comprises: The data acquisition module is used to collect real-time operating parameters of each node in the active distribution network. The real-time operating parameters include the real-time power generation of distributed power sources, the real-time power load of users, and the real-time state of charge of energy storage devices. The power supply simulation module is used to perform power supply simulation based on the real-time power generation, the real-time power load, and the real-time state of charge to determine the initial power supply scheme on the user side; the initial power supply scheme includes the initial power supply of the distributed power source and the initial charging and discharging power of the energy storage device; The power supply and distribution optimization module is used to perform stability assessment based on the current state of charge of the energy storage device and the voltage and current constraints of each node in the active distribution network after power supply is provided according to the initial power supply scheme, and to determine the final power supply scheme on the user side; the final power supply scheme includes the final power supply power of the distributed power source and the final charging and discharging power of the energy storage device.

10. A non-transitory computer-readable storage medium, wherein a computer software program is stored therein, characterized in that, When the computer software program is executed by the processor, it implements the power distribution method based on energy storage balance as described in any one of claims 1 to 8.

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