Method, system and equipment for adjusting three-phase imbalance line change of low-voltage power distribution network and medium

Abstract

The invention discloses a low-voltage power distribution network three-phase imbalance line change adjusting method, system and device and a medium, and relates to the technical field of low-voltage power distribution networks, and the method comprises the steps: obtaining the real-time power data of a three-phase circuit, and obtaining the three-phase imbalance degree based on the real-time power data; dynamically obtaining a judgment threshold value of a power grid balance state based on the historical operation data and the historical three-phase unbalance degree of the power distribution network; and comparing the real-time three-phase unbalance degree with a judgment threshold value to obtain a balance state judgment result of the power distribution network, and carrying out graded line change adjustment according to the balance state judgment result. According to the invention, an accurate basis is provided for the judgment of the three-phase imbalance state based on the judgment threshold value, so that an accurate adjustment demand is obtained, the adjustment precision is improved through graded wire change adjustment, and the problem of insufficient adjustment precision of a conventional three-phase imbalance adjustment technology is solved.

Description

Technical Field

[0001] This application relates to the field of low-voltage distribution network technology, specifically to a method, system, equipment, and medium for adjusting three-phase unbalanced switching in low-voltage distribution networks. Background Technology

[0002] In low-voltage distribution networks, when a large number of single-phase loads, impulsive loads, or asymmetrical loads are connected to the distribution network, or when asymmetrical changes occur in the three-phase power supply, three-phase imbalance will occur in the distribution network. For example, three-phase voltage imbalance or three-phase current imbalance may occur. Therefore, three-phase imbalance regulation of the distribution network is necessary. However, the conventional method of three-phase imbalance regulation in power systems is to adjust the unbalanced phases of users based on the load monitoring data of each phase. This method has the following problems: the imbalance regulation method based on phase adjustment technology cannot achieve quantitative regulation of three-phase current, and the load transfer operation is complex. If the operation sequence is not standardized, it will affect the reliability and stability of the distribution network and the quality of power supply. Summary of the Invention

[0003] The purpose of this application is to address the problem of insufficient adjustment accuracy of conventional three-phase imbalance adjustment technology; it proposes a method, system, equipment and medium for three-phase imbalance switching adjustment in low-voltage distribution networks. By dynamically acquiring judgment thresholds, it provides an accurate basis for judging the three-phase imbalance state, thereby obtaining precise adjustment requirements, and improving the adjustment accuracy through graded switching adjustment.

[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, embodiments of this application provide a method for adjusting three-phase imbalance switching in a low-voltage distribution network, the method comprising: Acquire real-time power data of a three-phase circuit, and obtain the three-phase imbalance based on the real-time power data; The threshold for judging the balance state of the power grid is dynamically obtained based on the historical operation data and historical three-phase imbalance of the distribution network. The real-time three-phase imbalance is compared with the judgment threshold to obtain the balance state judgment result of the distribution network, and the graded line replacement adjustment is carried out according to the balance state judgment result.

[0005] In this solution, the threshold for judging the balance state of the power grid is dynamically obtained by using historical operating data and historical three-phase imbalance of the distribution network. This provides a precise benchmark for judging and adjusting the balance state, thereby avoiding the problem of insufficient or excessive adjustment under different scenarios with fixed thresholds. The three-phase imbalance problem under different power scenarios is accurately solved by graded line replacement adjustment, avoiding the use of the same adjustment method for different load sizes, improving the targeting of adjustment, and ensuring the safety and stability of the adjustment process.

[0006] Preferably, the step of acquiring real-time power data of the three-phase circuit and acquiring the three-phase imbalance based on the real-time power data includes: Real-time acquisition of key power parameters of a three-phase circuit, including at least the electrical signals and power information of each phase and the load impedance characteristics of each phase; After validating the key power parameters, the average value of the three-phase electrical signal is calculated. Obtain the absolute value of the deviation of the average value of the three-phase current of each phase signal, and calculate the real-time three-phase unbalance based on the maximum absolute value of the deviation and the average value of the three-phase current.

[0007] Preferably, the threshold for dynamically obtaining the power grid balance state based on historical operating data and historical three-phase imbalance of the distribution network includes: The dynamic value of the power threshold for calculating the unbalanced state is obtained based on the historical operating data of the distribution network, and the power threshold is determined in combination with the rated power of the power source. The balance threshold of the unbalanced state is determined based on the historical three-phase unbalance, and the balance threshold is dynamically adjusted based on the real-time load type weight.

[0008] Preferably, the step of obtaining dynamic values ​​of the power threshold for calculating the unbalanced state based on historical operating data of the distribution network, and determining the power threshold in conjunction with the rated power of the power source, includes: The average power during the off-peak period in the historical data of the distribution network is obtained, and the ratio of this power to the rated power of the power source is used as the first dynamic value. The second dynamic value is obtained based on the sum of the first dynamic value and its percentage. The first dynamic value and the second dynamic value are dynamically adjusted based on the historical circuit load fluctuation characteristics; The power threshold is obtained by multiplying the rated power of the power supply by the first dynamic value and the second dynamic value, respectively. The product of the rated power of the power supply and the first dynamic value is used as the first power threshold, and the product of the rated power of the power supply and the second dynamic value is used as the second power threshold.

[0009] Preferably, the step of comparing the real-time three-phase imbalance with the judgment threshold to obtain the balance state judgment result of the distribution network includes: If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is less than the first power threshold, then it is determined to be a low power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold, and the current total power is greater than or equal to the first power threshold and less than the second power threshold, then it is determined to be a medium power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is greater than or equal to the second power threshold, then it is determined to be a high power imbalance state. If the real-time three-phase imbalance is less than the balance threshold, it is determined to be in a balanced state.

[0010] Preferably, the step of performing graded line-changing adjustment based on the balance state judgment result includes: When the distribution network is in a low power imbalance state, the voltage and current parameters of each phase are adjusted according to the incremental rule based on the adjustment range. When the distribution network is in a medium power imbalance state, the power deficit of each phase is calculated based on the load impedance characteristics of each phase, the compensation energy is determined according to the power deficit of each phase, and the voltage and current parameters of each phase are adjusted synchronously. When the power distribution network is in a state of high power imbalance, an overload warning is issued, and power compensation is performed on each phase circuit as well as the voltage and current parameters of each phase are adjusted.

[0011] Preferably, the method further includes: The three-phase imbalance is recalculated based on the adjusted power parameters until the three-phase current imbalance is less than the balance threshold. In the case of adjusting the high power imbalance state, if the real-time three-phase current imbalance is still greater than or equal to the balance threshold after a preset number of compensation and adjustment cycles, then the non-critical load circuit is cut off based on the load priority.

[0012] Secondly, embodiments of this application provide a three-phase unbalanced switching regulation system for a low-voltage distribution network, comprising: The detection module is used to acquire real-time power data of the three-phase circuit and to obtain the three-phase imbalance based on the real-time power data. The threshold module is used to dynamically obtain the judgment threshold of the power grid balance state based on the historical operating data and historical three-phase imbalance of the distribution network. The adjustment module is used to compare the real-time three-phase imbalance with the judgment threshold, obtain the balance state judgment result of the distribution network, and perform graded line switching adjustment based on the balance state judgment result.

[0013] Thirdly, embodiments of this application provide a computer device, including: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory is used to store computer programs; and the processor, when executing the program stored in the memory, implements the steps of the method described in the first aspect above.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method described in the first aspect above.

[0015] The beneficial effects of this application are: 1. By combining the ratio of power to rated power and whether the three-phase current imbalance exceeds the standard, the balance status of the three-phase circuit in the distribution network can be judged in two ways. This can accurately distinguish the imbalance status in different power ranges, thereby accurately matching the adjustment strategy under different load intensities, improving the targeting of adjustment, and avoiding the problem of insufficient adjustment accuracy caused by using the same adjustment method regardless of the load size. 2. Differentiated adjustment strategies are adopted for different imbalance states, including adjustment and compensation methods for low-power imbalance, medium-power imbalance and high-power imbalance. This solves the three-phase imbalance problem under different power scenarios, improves the adjustment accuracy, and ensures the safety and stability of the adjustment process. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0017] Figure 1 A flowchart of a three-phase unbalanced switching adjustment method for a low-voltage distribution network provided in this application embodiment.

[0018] Figure 2 This is a schematic diagram of a system module for a three-phase unbalanced switching adjustment method for a low-voltage distribution network, provided in an embodiment of this application.

[0019] Figure 3 A schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely one preferred embodiment of this application and are only used to explain this application. They do not limit the scope of protection of this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Example 1: As Figure 1 As shown, a method for adjusting three-phase imbalance switching in a low-voltage distribution network includes steps S1-S3, wherein: S1. Obtain real-time power data of the three-phase circuit, and obtain the three-phase imbalance based on the real-time power data; As an optional implementation, step S1 includes: Real-time acquisition of key power parameters of a three-phase circuit, including at least the electrical signals and power information of each phase and the load impedance characteristics of each phase; After validating the key power parameters, the average value of the three-phase electrical signal is calculated. Obtain the absolute value of the deviation of the average value of the three-phase current of each phase signal, and calculate the real-time three-phase unbalance based on the maximum absolute value of the deviation and the average value of the three-phase current.

[0022] Specifically, three-phase unbalance refers to the unbalance of three-phase current and the unbalance of three-phase voltage; Three-phase current imbalance = (maximum absolute value of deviation ÷ average value of three-phase current) × 100%; Three-phase voltage imbalance = (absolute value of maximum deviation ÷ average value of three-phase voltage) × 100%.

[0023] Specifically, the validity verification of key power parameters is carried out through dual-path cross-verification, which involves obtaining the deviation between two sets of data collected at the same time. If the deviation between the two sets of data is less than or equal to a preset deviation threshold, the data is deemed valid. If the deviation between the two sets of data is greater than the preset deviation threshold, the data at that time is re-collected.

[0024] The purpose of obtaining the load impedance characteristics of each phase circuit is to identify the load type, thereby providing a weighting basis for the dynamic adjustment of the balance threshold, ensuring that the balance threshold matches the operating characteristics of the actual load type, and thus guaranteeing the accuracy of the unbalanced state judgment. Simultaneously, identifying the load type facilitates the determination of load priorities, providing load priority support for handling unbalanced states after subsequent unbalance adjustments.

[0025] S2. Dynamically obtain the judgment threshold of the power grid balance state based on the historical operation data and historical three-phase imbalance of the distribution network; As an optional implementation, the threshold for dynamically obtaining the power grid balance state based on historical operating data and historical three-phase imbalance of the distribution network includes: The dynamic value of the power threshold for calculating the unbalanced state is obtained based on the historical operating data of the distribution network, and the power threshold is determined in combination with the rated power of the power source. The balance threshold of the unbalanced state is determined based on the historical three-phase unbalance, and the balance threshold is dynamically adjusted based on the real-time load type weight.

[0026] In some possible embodiments, a balance threshold for the unbalanced state is determined based on historical three-phase unbalance, and the balance threshold is dynamically adjusted based on real-time load type weights, including: Extract the three-phase current values ​​at each time of day from historical data, calculate the three-phase current imbalance at each time of day, and statistically analyze the duration and magnitude of the imbalance exceeding the standard each day. Based on the distribution, select candidate imbalance values ​​to calculate the balance threshold. For example: balance threshold = 95th percentile imbalance value in historical data × 0.9. The real-time load type weight is determined based on the proportion of load types in historical data. For example, for scenarios with a high proportion of single-phase loads and many impact loads, the balance threshold is lowered by 10%-15% (such as adjusting the regular threshold of 5% to 4%-4.5%). For scenarios with balanced three-phase loads and stable operation, the threshold can be raised by 5%-10%, which avoids over-adjustment and ensures the adjustment accuracy in special scenarios.

[0027] As an optional implementation, the step of obtaining dynamic values ​​of the power threshold for calculating the unbalanced state based on historical operating data of the distribution network, and determining the power threshold in conjunction with the rated power of the power source, includes: The average power during the off-peak period in the historical data of the distribution network is obtained, and the ratio of this power to the rated power of the power source is used as the first dynamic value. The second dynamic value is obtained based on the sum of the first dynamic value and its percentage. The first dynamic value and the second dynamic value are dynamically adjusted based on the historical circuit load fluctuation characteristics; The power threshold is obtained by multiplying the rated power of the power supply by the first dynamic value and the second dynamic value, respectively. The product of the rated power of the power supply and the first dynamic value is used as the first power threshold, and the product of the rated power of the power supply and the second dynamic value is used as the second power threshold.

[0028] In some examples, the average total power during the off-peak period in statistical historical data (such as 3 months of historical operating data) is used as the value a (first dynamic value) by taking 1.2 times the ratio of this average value to the rated power of the power supply. The value b (second dynamic value) is equal to the first dynamic value plus 25%, and 100% > b > a.

[0029] S3. Compare the real-time three-phase imbalance with the judgment threshold to obtain the balance state judgment result of the distribution network, and perform graded line switching adjustment based on the balance state judgment result.

[0030] As an optional implementation, in step S3, the real-time three-phase imbalance is compared with the judgment threshold to obtain the balance state judgment result of the distribution network, including: If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is less than the first power threshold, then it is determined to be a low power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold, and the current total power is greater than or equal to the first power threshold and less than the second power threshold, then it is determined to be a medium power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is greater than or equal to the second power threshold, then it is determined to be a high power imbalance state. If the real-time three-phase imbalance is less than the balance threshold, it is determined to be in a balanced state.

[0031] In some examples, the current total power is calculated as follows: The rated power of the power supply is The three-phase imbalance criterion is as follows: like Furthermore, if the three-phase current imbalance is greater than or equal to the imbalance threshold, it is determined to be a low-power imbalance state. like Furthermore, if the three-phase current imbalance is greater than or equal to the imbalance threshold, it is determined to be a medium-power imbalance state. like Furthermore, if the three-phase current imbalance is greater than or equal to the balance threshold, it is determined to be a high-power imbalance state.

[0032] In this embodiment, a precise decision-making logic for determining whether adjustment is needed and, if so, the intensity of adjustment is constructed through a dual comparison of three-phase current imbalance and balance threshold, as well as total power and power threshold. This overcomes the limitations of single-index judgment and solves the one-sided problem of traditional judgments that only consider imbalance and ignore load scale or only consider power and ignore balance state. On the one hand, by comparing imbalance and balance threshold, the core prerequisite for adjustment initiation is clarified, ensuring that intervention is triggered only when the imbalance exceeds the standard, avoiding ineffective operation in the balanced state, and reducing equipment operating losses. On the other hand, by dividing the total power into proportions with the power threshold, adjustment strategies under different load intensities are precisely matched, ensuring the targeting and accuracy of adjustment, avoiding parameter fluctuations caused by over-adjustment or power supply hazards caused by under-adjustment, thereby significantly improving the compliance rate of three-phase current imbalance.

[0033] As an optional implementation, step S3 involves performing graded line-changing adjustments based on the balance state judgment result, including: When the distribution network is in a low power imbalance state, the voltage and current parameters of each phase are adjusted according to the incremental rule based on the adjustment range. When the distribution network is in a medium power imbalance state, the power deficit of each phase is calculated based on the load impedance characteristics of each phase, the compensation energy is determined according to the power deficit of each phase, and the voltage and current parameters of each phase are adjusted synchronously. When the power distribution network is in a state of high power imbalance, an overload warning is issued, and power compensation is performed on each phase circuit as well as the voltage and current parameters of each phase are adjusted.

[0034] Specifically, the power deficit of each phase = (average power of three phases - actual power of that phase). Three-phase average power = (phase A power + phase B power + phase C power) ÷ 3; Single-phase actual power = voltage value × phase current value × power factor (power factor is determined based on load impedance characteristics).

[0035] Furthermore, the compensation energy is equal to the power deficit of that phase multiplied by 0.8. The remaining deficit is compensated through parameter adjustments, with priority given to adjusting the phase with the largest power deficit.

[0036] As an optional implementation, the method further includes: The three-phase imbalance is recalculated based on the adjusted power parameters until the three-phase current imbalance is less than the balance threshold. In the case of adjusting the high power imbalance state, if the real-time three-phase current imbalance is still greater than or equal to the balance threshold after a preset number of compensation and adjustment cycles, then the non-critical load circuit is cut off based on the load priority.

[0037] In this embodiment, under low-power scenarios, the voltage and current parameters of each phase are adjusted by gradually increasing the adjustment range to avoid energy waste caused by starting the power compensation module. Small-step adjustments can reduce the impact of parameter sudden changes on the circuit, thereby ensuring the stable operation of sensitive loads. Under medium-power scenarios, precise power compensation and parameter coordinated adjustment are combined. First, power deficit is calculated and directional compensation power is delivered. Then, parameter adjustments are made to improve the efficiency of imbalance improvement and shorten the time to reach the target. Under high-power scenarios, early warning and adjustment are executed simultaneously, and a non-critical load disconnection mechanism is superimposed. This can quickly reduce the imbalance while avoiding circuit failures caused by total power overload, thereby ensuring the power supply continuity of critical loads (such as key industrial equipment and basic residential lighting).

[0038] Based on the same inventive concept, this application also provides a three-phase unbalanced switching adjustment system for a low-voltage distribution network, corresponding to a three-phase unbalanced switching adjustment method for a low-voltage distribution network, such as... Figure 2 As shown, it includes: The detection module is used to acquire real-time power data of the three-phase circuit and to obtain the three-phase imbalance based on the real-time power data. The threshold module is used to dynamically obtain the judgment threshold of the power grid balance state based on the historical operating data and historical three-phase imbalance of the distribution network. The adjustment module is used to compare the real-time three-phase imbalance with the judgment threshold, obtain the balance state judgment result of the distribution network, and perform graded line switching adjustment based on the balance state judgment result.

[0039] In this embodiment, the dynamic judgment threshold of the power grid balance state provides a precise benchmark for balance state determination and adjustment, thereby avoiding the problem of insufficient or excessive adjustment under fixed threshold in different scenarios; the three-phase imbalance problem under different power scenarios is accurately solved by graded line replacement adjustment, avoiding the use of the same adjustment method for different load sizes, improving the targeting of adjustment, and ensuring the safety and stability of the adjustment process.

[0040] This application also provides a computer device, such as... Figure 3 As shown, it includes a processor 31, a communication interface 32, a memory 33, and a communication bus, wherein the processor 31, the communication interface 32, and the memory 33 communicate with each other through the communication bus. Memory 33 is used to store computer programs; The processor 31 is used to execute the program stored in the memory 33 to implement the three-phase unbalance switching adjustment method for low-voltage distribution networks.

[0041] The communication bus mentioned in the above computer equipment can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0042] Communication interface 32 is used for communication between the aforementioned computer equipment and other devices.

[0043] The memory 33 may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory 33 may also be at least one storage device located remotely from the aforementioned processor.

[0044] The processor 31 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0045] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements a method for adjusting three-phase imbalance switching in a low-voltage distribution network.

[0046] The above-described embodiments are preferred embodiments of this application and are not intended to limit the specific scope of this application. The scope of this application includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the shape, structure, and method of this application are within the protection scope of this application.

Claims

1. A method for adjusting three-phase imbalance switching in a low-voltage distribution network, characterized in that: Includes the following steps: Acquire real-time power data of a three-phase circuit, and obtain the three-phase imbalance based on the real-time power data; The threshold for judging the balance state of the power grid is dynamically obtained based on the historical operation data and historical three-phase imbalance of the distribution network. The real-time three-phase imbalance is compared with the judgment threshold to obtain the balance state judgment result of the distribution network, and the graded line replacement adjustment is carried out according to the balance state judgment result.

2. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 1, characterized in that: The acquisition of real-time power data of the three-phase circuit, and the acquisition of three-phase imbalance based on the real-time power data, includes: Real-time acquisition of key power parameters of a three-phase circuit, including at least the electrical signals and power information of each phase and the load impedance characteristics of each phase; After validating the key power parameters, the average value of the three-phase electrical signal is calculated. Obtain the absolute value of the deviation of the average value of the three-phase current of each phase signal, and calculate the real-time three-phase unbalance based on the maximum absolute value of the deviation and the average value of the three-phase current.

3. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 1, characterized in that: The threshold for dynamically obtaining the power grid balance state based on historical operating data and historical three-phase imbalance of the distribution network includes: The dynamic value of the power threshold for calculating the unbalanced state is obtained based on the historical operating data of the distribution network, and the power threshold is determined in combination with the rated power of the power source. The balance threshold of the unbalanced state is determined based on the historical three-phase unbalance, and the balance threshold is dynamically adjusted based on the real-time load type weight.

4. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 3, characterized in that: The process of obtaining dynamic values ​​of the power threshold for calculating the unbalanced state based on historical operating data of the distribution network, and determining the power threshold in conjunction with the rated power of the power source, includes: The average power during the off-peak period in the historical data of the distribution network is obtained, and the ratio of this power to the rated power of the power source is used as the first dynamic value. The second dynamic value is obtained based on the sum of the first dynamic value and its percentage. The first dynamic value and the second dynamic value are dynamically adjusted based on the historical circuit load fluctuation characteristics; The power threshold is obtained by multiplying the rated power of the power supply by the first dynamic value and the second dynamic value, respectively. The product of the rated power of the power supply and the first dynamic value is used as the first power threshold, and the product of the rated power of the power supply and the second dynamic value is used as the second power threshold.

5. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 4, characterized in that: The step of comparing the real-time three-phase imbalance with the judgment threshold to obtain the balance state judgment result of the distribution network includes: If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is less than the first power threshold, then it is determined to be a low power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold, and the current total power is greater than or equal to the first power threshold and less than the second power threshold, then it is determined to be a medium power imbalance state. If the real-time three-phase imbalance is greater than or equal to the balance threshold and the current total power is greater than or equal to the second power threshold, then it is determined to be a high power imbalance state. If the real-time three-phase imbalance is less than the balance threshold, it is determined to be in a balanced state.

6. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 5, characterized in that: The step of performing graded line switching adjustment based on the balance state judgment result includes: When the distribution network is in a low power imbalance state, the voltage and current parameters of each phase are adjusted according to the incremental rule based on the adjustment range. When the distribution network is in a medium power imbalance state, the power deficit of each phase is calculated based on the load impedance characteristics of each phase, the compensation energy is determined according to the power deficit of each phase, and the voltage and current parameters of each phase are adjusted synchronously. When the power distribution network is in a state of high power imbalance, an overload warning is issued, and power compensation is performed on each phase circuit as well as the voltage and current parameters of each phase are adjusted.

7. The method for adjusting three-phase imbalance switching in a low-voltage distribution network according to claim 6, characterized in that: The method further includes: The three-phase imbalance is recalculated based on the adjusted power parameters until the three-phase current imbalance is less than the balance threshold. In the case of adjusting the high power imbalance state, if the real-time three-phase current imbalance is still greater than or equal to the balance threshold after a preset number of compensation and adjustment cycles, then the non-critical load circuit is cut off based on the load priority.

8. A three-phase unbalanced switching system for low-voltage distribution networks, applicable to the three-phase unbalanced switching method for low-voltage distribution networks as described in any one of claims 1-7, characterized in that: include: The detection module is used to acquire real-time power data of the three-phase circuit and to obtain the three-phase imbalance based on the real-time power data. The threshold module is used to dynamically obtain the judgment threshold of the power grid balance state based on the historical operating data and historical three-phase imbalance of the distribution network. The adjustment module is used to compare the real-time three-phase imbalance with the judgment threshold, obtain the balance state judgment result of the distribution network, and perform graded line switching adjustment based on the balance state judgment result.

9. A computer device, characterized in that: include: The system includes a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory communicate with each other via the communication bus. The memory stores computer programs. When the processor executes the program stored in the memory, it implements the steps of the three-phase unbalanced switching adjustment method for low-voltage distribution networks as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the three-phase unbalanced switching adjustment method for low-voltage distribution networks as described in any one of claims 1-7.

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