Active power balance control system for high voltage distribution line induction power pickup module

Abstract

The application belongs to the technical field of power system power supply management, and discloses an active power balance control system of a high-voltage distribution line induction power taking module; comprising: phase interval division is carried out on a line alternating current cycle, and an adjustable power taking energy sequence and a power balance demand energy sequence of each phase interval are obtained; power taking disturbance is applied in each phase interval respectively, and a unit power taking aftereffect sequence is obtained; difference superposition and aftereffect convergence analysis are carried out on the unit power taking aftereffect sequences of different phase intervals, and an aftereffect mutual cancellation initial cost is obtained; through analysis of non-balance transmission distribution of the adjustable power taking energy and the power balance demand energy and power taking aftereffect residual change, transmission costs of different phase intervals are obtained; compensation analysis is carried out on the adjustable power taking energy and the power balance demand energy of different phase intervals, and active power balance control is executed. The application realizes power taking aftereffect sensing, cross-phase collaborative distribution and multi-stage energy compensation, and improves power balance coordination.

Description

Technical Field

[0001] This invention relates to the field of power supply management technology for power systems, and more specifically, to an active power balance control system for inductive power extraction modules of high-voltage distribution lines. Background Technology

[0002] Monitoring, communication, and status sensing equipment on high-voltage distribution lines typically require a stable power supply over a long period. Utilizing the alternating electromagnetic field around the line for inductive power extraction can reduce the need for independent power supply units. Since the line current fluctuates with load changes, the output power of the inductive power extraction module also varies accordingly. Therefore, the power extraction process needs to be dynamically adjusted based on the line's operating status and downstream load demands, and the power supply balance should be maintained through the DC bus and energy storage unit.

[0003] Existing inductive power extraction control typically focuses on the current power extraction capacity and load demand during power regulation. However, current power extraction adjustments can have a lasting impact on the inductive state in subsequent periods, leading to mutual influences between different adjustment times. Furthermore, the combined effects of adjustments at different power extraction times can change with the power allocation process, making it difficult for pre-determined power allocation relationships to consistently reflect the actual power extraction status. Moreover, when a supply-demand gap remains after one power adjustment by the inductive power extraction side, the lack of further coordination between the remaining power extraction capacity, the DC bus's own energy buffering capacity, and the energy storage units can easily increase the frequency of energy storage units participating in short-term power regulation. Therefore, there is still room for improvement in how to coordinate the allocation of power extraction capacity at different stages while considering the timing effects of power extraction adjustments, and further achieve coordinated control between inductive power extraction, bus energy buffering, and energy storage compensation. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art and to achieve the above objectives, the present invention provides the following technical solution: an active power balance control system for an inductive power extraction module of a high-voltage power distribution line, comprising: The power demand construction module divides the AC cycle of the line into phase intervals and obtains the adjustable power demand sequence and power balance demand energy sequence for each phase interval. The power extraction aftereffect characterization module applies power extraction perturbations to each phase interval to obtain the unit power extraction aftereffect sequence for different phase intervals; The aftereffect cancellation analysis module performs differential superposition and aftereffect convergence analysis on the unit power-taking aftereffect sequence in different phase intervals to obtain the initial cost of aftereffect cancellation. The transmission cost iteration module, based on the initial cost of aftereffect cancellation, obtains the transmission cost in different phase intervals by analyzing the unbalanced transmission distribution of available power energy and power balance demand energy and the change of power extraction aftereffect residual. The power balance control module performs compensation analysis on the available electrical energy and power balance demand energy in different phase intervals based on transmission cost, and executes active power balance control.

[0005] Preferably, the processing flow of the power extraction aftereffect characterization module includes: A phase interval is selected sequentially as the disturbance phase interval, and a preset unit of energy is added to the reference energy taken in the disturbance phase interval; After applying a preset unit of energy harvesting, the average induced voltage of each phase interval is subtracted from the reference induced voltage of the same phase number in the reference phase induced voltage sequence to obtain the power harvesting effect difference value. The actual increase in power extraction energy is obtained by taking the actual increase in power extraction energy in the disturbance phase interval. The difference in power extraction aftereffects in the same disturbance phase interval is divided by the actual increase in power extraction energy to obtain the unit power extraction aftereffect value. Starting from the perturbation phase interval, the unit power-out aftereffect values ​​of different phase intervals are spliced ​​together in ascending order of phase number to obtain the unit power-out aftereffect sequence; Starting from the end of the unit power-out aftereffect sequence, perform a reverse traversal to identify continuous unit power-out aftereffect value segments where the absolute value of each unit power-out aftereffect value is not greater than a preset aftereffect convergence threshold. The phase interval with the smallest phase number in the continuous unit power-out aftereffect value segment is marked as the aftereffect termination interval; Different phase intervals are selected as disturbance phase intervals, and each phase interval is obtained as the unit power-out aftereffect sequence and aftereffect termination interval under the disturbance phase interval.

[0006] Preferably, the processing flow of the aftereffect cancellation analysis module includes: Perform a self-Cartesian product calculation on the set of phase intervals to obtain several pairs of phase intervals, and remove the phase interval pairs that have the same phase intervals; For each pair of phase intervals, the two phase intervals are marked as the first phase interval and the second phase interval respectively according to the ascending order of the phase numbers; For each sequence element of the unit power take-off effect sequence in the second phase interval, subtract the sequence elements with the same phase number in the corresponding unit power take-off effect sequence in the first phase interval from each sequence element to obtain the power take-off migration effect sequence. Identify the termination interval of the aftereffect sequence of power-taking migration and mark it as the termination interval of the aftereffect of migration. The phase number difference between the aftereffect termination interval and the migration aftereffect termination interval of the first phase interval is calculated to obtain the shortening amount of the aftereffect termination interval of the phase interval pair. The residual amount of the migration effect of the phase interval pair is obtained by summing the absolute values ​​of all sequence elements in the after-effect sequence of the power transfer migration. The aftereffect termination interval shortening and migration aftereffect residual amount for different phase interval pairs are normalized to obtain the normalized migration aftereffect residual amount and the normalized aftereffect termination interval shortening amount, respectively. Subtracting the normalized amount of the aftereffect shortening of the aftereffect termination interval from the normalized amount of the aftereffect residual of the same phase interval pair yields the initial cost of aftereffect cancellation.

[0007] Preferably, the processing flow of the transmission cost iteration module includes: For each phase interval pair, the first phase interval and the second phase interval are marked as the supply phase interval and the demand phase interval, respectively, and the initial cost of the aftereffect mutual cancellation is used as the transmission cost of the current round. The available electrical energy in different supply phase intervals and the power balance demand energy in different demand phase intervals are added together to obtain the total available energy and the total demand energy, respectively. Based on the total available energy, the total required energy, and the transmission cost of the current round, the first round of entropy regularization non-equilibrium optimal transmission iteration process is executed to obtain the transmission energy of different phase interval pairs in the first round; The transmitted energy output from the same supply phase interval is accumulated according to the phase number to obtain the current round power extraction regulation energy of the supply phase interval; Divide the current round power extraction regulation energy of each phase interval by the preset unit power extraction energy to obtain the scaling factor. Based on the scaling factor, scale the unit power extraction aftereffect sequence of the phase interval element by element to obtain the current round power extraction aftereffect contribution sequence. For the current round power-taking effect contribution sequence in different phase intervals, the current round power-taking effect contribution in the same phase interval is accumulated according to the phase number, and the accumulated results are spliced ​​together in ascending order of phase number to obtain the current round power-taking effect residual sequence; Subtract the current cycle's power extraction adjustment energy from the adjustable electrical energy supplied in the phase interval to obtain the remaining adjustable electrical energy. The phase intervals with remaining available electrical energy greater than zero are marked as candidate phase intervals. For each candidate phase interval, the aftereffect residual-driven transmission cost analysis process is performed to obtain the next round transmission cost for different phase interval pairs. The decision-making process for the next round of entropy regularization non-equilibrium optimal transmission iteration is then determined.

[0008] Preferably, the processing flow of the aftereffect residual-driven transmission cost analysis process includes: The unit power-taking aftereffect sequence of the candidate phase interval is added to the power-taking aftereffect residual sequence of the current round one by one according to the same phase number to obtain the candidate trial aftereffect residual sequence; Identify the aftereffect termination intervals of the current round power-taking aftereffect residual sequence and the candidate trial aftereffect residual sequence, and mark them as the current round termination interval and the trial termination interval, respectively. The difference between the phase numbers of the current round termination interval and the trial termination interval is calculated to obtain the change in the candidate aftereffect termination position; For the residual sequence of the current power-taking effect and the residual sequence of the candidate trial effect, the absolute values ​​of all sequence elements are accumulated respectively, and the previous accumulation result is subtracted from the next accumulation result to obtain the candidate residual change amount. The changes in the candidate aftereffect termination position and the changes in the candidate aftereffect residual are normalized and weighted respectively to obtain the aftereffect residual feedback amount of the candidate phase interval. Select the phase interval pairs that are candidate phase intervals in the previous round, and subtract the aftereffect residual feedback amount from the current round transmission cost to obtain the next round transmission cost of the corresponding phase interval pairs.

[0009] Preferably, the process for making decisions on the next round of entropy-regularized non-equilibrium optimal transport iteration includes: Repeatedly execute the entropy regularization non-equilibrium optimal transmission iterative process. After each execution, calculate the absolute value of the difference between the transmission energy in the current round and the transmission energy in the previous round for each phase interval, and record it as the transmission change energy of adjacent rounds. The energy of the transmission change in adjacent rounds of all phase intervals is determined. If the energy of the transmission change in adjacent rounds of all phase intervals is not greater than the preset transmission change threshold, the entropy regularization non-equilibrium optimal transmission iteration process is terminated and process one and process two are executed. If there is a phase interval where the energy of the transmission change in adjacent rounds is greater than the preset transmission change threshold, the next round of entropy regularization non-equilibrium optimal transmission iteration process is executed. Step 1: Arrange the current power extraction and regulation energy of different phase intervals in ascending order of phase number to obtain the active power extraction and regulation energy sequence; Step 2: For each demand phase interval, subtract the cumulative transmission energy from all supply phase intervals to the corresponding demand phase interval in the current round from the phase power balance demand energy to obtain the unaccepted demand energy; splice the unaccepted demand energy according to the phase number to obtain the unaccepted demand energy sequence.

[0010] Preferably, the processing flow of the power balance control module includes: The active power extraction regulation energy sequence and the reference phase power extraction energy sequence are added one by one according to the same phase number to obtain the target phase power extraction energy sequence; The process of accumulating unmet demand energy is executed, including accumulating unmet demand energy element by element to obtain the cumulative demand release energy of the bus. Each time unmet demand energy is accumulated, a threshold comparison process is executed to extract the compensation phase interval. Summarize the set of compensation phase intervals and filter the set of supply phase intervals where the remaining available electrical energy is greater than zero; The Cartesian product of the supply phase interval set and the compensation phase interval set is calculated to obtain several supply-compensation interval pairs; The transmission cost of each supply compensation interval pair is extracted from the final round of entropy regularization non-equilibrium optimal transmission iteration process, and the supply compensation interval pairs are arranged in ascending order of transmission cost to obtain the compensation sequence. Traverse the compensation sequence. Each time a traversal is performed, mark the obtained supply compensation interval pairs as target interval pairs and perform the energy compensation process on the target interval pairs. When the traversal of the compensation sequence is completed, the remaining adjustable electrical energy actually called in each supply phase interval is added to the corresponding active power extraction regulation energy, and the target phase power extraction energy sequence is updated. By arranging the actual compensated transmission energy in different compensation phase intervals, the energy storage compensation energy sequence is obtained; Active power balance control is performed using the target phase power extraction energy sequence and the energy storage compensation energy sequence.

[0011] Preferably, the processing flow of the threshold comparison process includes: Compare the cumulative demand energy released by the busbar with the allowable energy release threshold of the busbar; If the cumulative demand release energy of the bus is not greater than the allowable release energy threshold of the bus, then the demand phase interval corresponding to the unaccepted demand energy accumulated in this time is marked as the compensation phase interval, and the unaccepted demand energy accumulation process is repeated. If the cumulative demand energy released by the bus exceeds the allowable energy release threshold of the bus, the process of accumulating unaccepted demand energy will be stopped.

[0012] Preferably, the processing flow for performing energy compensation on the target interval includes: When performing the energy compensation process, the remaining available electrical energy in the supply phase interval is compared with the unmet demand energy in the compensation phase interval. If the remaining available electrical energy is greater than the unmet demand energy, then an energy value equal to the unmet demand energy is extracted from the supply phase interval and used as transmission energy to compensate the compensation phase interval. If the remaining available electrical energy is not greater than the unmet demand energy, the remaining available electrical energy will be used as transmission energy to compensate the compensation phase interval. For all supply-compensation interval pairs that are not target interval pairs, update the remaining available electrical energy of each supply phase interval and the unmet demand energy of each compensation phase interval; perform the next traversal on the compensation sequence.

[0013] Preferably, the process of performing active power balance control using the target phase power extraction energy sequence and the energy storage compensation energy sequence includes: According to the increasing order of the phase number of the current line AC cycle, the target power energy in the target phase power energy sequence is read sequentially, and the power extraction process is executed in the corresponding phase interval by the power extraction power adjustment unit. Following the increasing order of phase numbers, the energy storage compensation energy in the energy storage compensation energy sequence is read sequentially, and the energy storage unit performs the discharge process in the corresponding phase interval.

[0014] The technical effects and advantages of the active power balance control system of the high-voltage power distribution line inductive power extraction module of this invention are as follows: (1) The present invention constructs a unit power extraction aftereffect sequence by phase power extraction disturbance and determines the aftereffect termination interval, so that the power extraction adjustment of each phase can simultaneously consider its continued influence on the subsequent phase induction state, providing a more accurate basis for cross-phase power allocation.

[0015] (2) The present invention establishes the initial cost of aftereffect cancellation by superimposing the difference of the aftereffect sequence of unit power extraction, and dynamically updates the unbalanced optimal transmission cost by combining the aftereffect residual of each round of power extraction, so that the power extraction energy is redistributed to the phase combination with shorter aftereffect duration and smaller residual amount in each round, thereby improving the coordination between the inductive power extraction power regulation and subsequent electromagnetic state changes.

[0016] (3) The present invention utilizes the final transmission cost to continue to call up the remaining available electrical energy, and determines the compensation range in combination with the energy allowed to be released by the bus, and then the energy storage unit undertakes the remaining demand, so that the inductive power collection, the energy release of the bus and the energy storage compensation form a progressive power balance process, reducing unnecessary energy storage charging and discharging regulation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the active power balance control system of the high-voltage power distribution line inductive power extraction module of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall flow of the active power balance control system of the high-voltage power distribution line inductive power extraction module of the present invention.

[0019] Figure 3 This is a schematic diagram of the transmission cost iteration module in the active power balance control system of the high-voltage power distribution line inductive power extraction module of the present invention. Detailed Implementation

[0020] 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.

[0021] This application provides an active power balance control system for inductive power extraction modules in high-voltage power distribution lines. By dividing the AC cycle phase intervals of the line, a unit power extraction aftereffect sequence is constructed, and the aftereffect cancellation relationship between different phases is analyzed. Based on this, entropy-regularized unbalanced optimal transmission driven by aftereffect residuals is used to iteratively allocate the adjustable power extraction energy and power balance requirements of each phase. Finally, by combining the releaseable energy of the bus, the remaining adjustable power extraction energy, and energy storage compensation, a target power extraction energy sequence is formed, realizing active power balance control of the inductive power extraction module. This invention achieves power extraction aftereffect sensing, cross-phase collaborative allocation, and multi-level energy compensation, improving power balance coordination.

[0022] Please see Figure 1 , Figure 2 and Figure 3 In this embodiment of the invention, the active power balance control system of the high-voltage power distribution line inductive power extraction module is implemented in detail through the following modules: The power demand construction module divides the AC cycle of the line into phase intervals and obtains the adjustable power demand sequence and power balance demand energy sequence for each phase interval; in this embodiment, it is also necessary to obtain the reference phase power demand energy sequence and the reference phase induced voltage sequence.

[0023] The processing flow of the power demand construction module includes: The current of high-voltage distribution lines is detected, the AC cycle of the lines is identified, the AC cycle of the lines is divided into phase intervals and numbered to obtain a set of phase intervals and a phase number for each phase interval. In this embodiment, for example, if the rated frequency of the high-voltage distribution line is 50Hz, then the theoretical duration of one AC cycle of the line is 20ms. The active power balance controller takes the zero-crossing sampling position where the line current changes from negative to non-negative as the starting position of the AC cycle of the line, and takes the next sampling position that satisfies the same zero-crossing direction condition as the ending position of the AC cycle of the line. Assuming the preset number of phase intervals is 12, the 360° electrical angle corresponding to one AC cycle of the line is divided into 12 phase intervals, each phase interval corresponding to 30° electrical angle. Taking the starting position of the AC cycle of the line as the 0° phase position, the phase intervals are divided in chronological order as follows: Phase 1: 0° to 30°; Phase 2: 30° to 60°; ... Phase 12: 330° to 360°. Correspondingly, the above 12 phase intervals are set as phase number 1 to phase number 12 in chronological order.

[0024] Obtain the reference phase power extraction energy sequence, reference phase induced voltage sequence, adjustable power extraction energy sequence, and power balance demand energy sequence for different phase intervals: In this embodiment, the specific process includes acquiring the high-voltage distribution line current, the voltage at the end of the power extraction winding, the current at the power extraction winding, the DC bus voltage, and the DC load current according to a fixed sampling interval; performing time integration based on the product of the voltage at the end of the power extraction winding and the current at the power extraction winding within the corresponding phase interval to obtain the reference power extraction energy; and calculating the arithmetic mean of the induced voltage at the power extraction winding within the corresponding phase interval to obtain the reference induced voltage. Under different line current levels, the power extraction energy is gradually increased for each phase interval. The maximum power extraction energy when the power extraction winding current, power extraction winding terminal voltage, and magnetic core flux do not exceed the corresponding allowable upper limit is determined as the phase allowable power extraction energy threshold for the corresponding phase interval under the line current level. In actual operation, the corresponding phase allowable power extraction energy threshold is obtained by interpolation based on the current line current amplitude. The difference between the current power extraction energy and the allowable power extraction energy threshold is calculated to obtain the adjustable power extraction energy. The load energy requirement is calculated based on the load power and phase interval duration within the corresponding phase interval. The difference between the current bus energy and the preset bus energy is calculated based on the DC bus capacitance value, the current bus voltage, and the preset bus voltage to obtain the bus regulation energy requirement. Specifically, the bus capacitance value is multiplied by the square of the corresponding bus voltage and then divided by two to obtain the corresponding bus energy. The load energy requirement and the bus regulation energy requirement are then added together and the current power draw is subtracted to obtain the power balance energy requirement for that phase interval.

[0025] The power extraction aftereffect characterization module applies power extraction perturbations to each phase interval to obtain the unit power extraction aftereffect sequence for different phase intervals.

[0026] The processing flow of the power extraction aftereffect characterization module includes: A phase interval is selected sequentially as the disturbance phase interval, and a preset unit energy is added to the reference energy of the disturbance phase interval; wherein, the preset unit energy is obtained by multiplying the minimum executable power adjustment by the duration of the corresponding phase interval; the power control state of other phase intervals within the AC cycle of the line remains unchanged; After applying a preset unit of energy harvesting, the average induced voltage of each phase interval is subtracted from the reference induced voltage of the same phase number in the reference phase induced voltage sequence to obtain the power harvesting effect difference value. Obtain the actual increase in power extraction energy in the disturbance phase interval to get the actual increase in power extraction energy. Divide the difference in power extraction aftereffects in the same disturbance phase interval by the actual increase in power extraction energy to get the unit power extraction aftereffect value. Starting from the perturbation phase interval, the unit power-out aftereffect values ​​of different phase intervals are spliced ​​together in ascending order of phase number to obtain the unit power-out aftereffect sequence; Starting from the end of the unit power extraction aftereffect sequence, a reverse traversal is performed to identify continuous unit power extraction aftereffect value segments where the absolute value of each unit power extraction aftereffect value is not greater than a preset aftereffect convergence threshold. The preset aftereffect convergence threshold is determined based on the absolute value of the induced voltage difference of adjacent lines with the same phase number in the AC cycle under a pre-calibrated fixed power extraction state. The absolute values ​​of the induced voltage difference in the calibration data are sorted from smallest to largest, and the absolute value of the induced voltage difference corresponding to the 95th percentile is taken as the preset aftereffect convergence threshold. The phase interval with the smallest phase number in the continuous unit power extraction aftereffect value segment is marked as the aftereffect termination interval; where there is no phase interval that meets the above conditions, the phase interval corresponding to the largest phase number in the AC cycle of the line is marked as the aftereffect termination interval. Different phase intervals are selected as disturbance phase intervals, and each phase interval is obtained as the unit power-out aftereffect sequence and aftereffect termination interval under the disturbance phase interval.

[0027] To address the problem that existing inductive power extraction regulation processes primarily configure energy extraction based on the current phase's power extraction demand, making it difficult to reflect the continuous impact of the current power extraction action on the subsequent phase induction state, this invention divides phase intervals according to the line's AC cycle and applies power extraction disturbances to different phase intervals. By comparing the changes in phase induction voltage before and after the disturbance, the actual increase in power extraction energy is normalized to form a unit power extraction aftereffect sequence, while simultaneously determining the aftereffect termination interval of the power extraction action in each phase interval. This allows the power extraction regulation of each phase to simultaneously consider its continued impact on the sensing state of subsequent phases, distinguishing phase intervals with similar power extraction energy but different subsequent impact ranges, and solving the problem that the power extraction conditions of subsequent phases are continuously occupied after the power extraction regulation of the previous phase is completed, without being identified by the control process.

[0028] The aftereffect cancellation analysis module performs differential superposition and aftereffect convergence analysis on the unit power-taking aftereffect sequences in different phase intervals to obtain the initial cost of aftereffect cancellation.

[0029] The processing flow of the aftereffect cancellation analysis module includes: Perform a self-Cartesian product calculation on the set of phase intervals to obtain several pairs of phase intervals, and remove the phase interval pairs that have the same phase intervals; For each pair of phase intervals, the two phase intervals are marked as the first phase interval and the second phase interval respectively according to the ascending order of the phase numbers; For each sequence element of the unit power take-off effect sequence in the second phase interval, subtract the sequence elements with the same phase number in the corresponding unit power take-off effect sequence in the first phase interval from each sequence element to obtain the power take-off migration effect sequence. Identify the termination interval of the aftereffect sequence of power supply migration and mark it as the termination interval of the aftereffect. The identification process involves traversing backward from the end of the power supply migration aftereffect sequence to identify continuous power supply migration aftereffect value segments where the absolute value of each aftereffect value is not greater than a preset aftereffect convergence threshold. The phase interval with the smallest phase number in the continuous power supply migration aftereffect value segments is marked as the termination interval of the aftereffect.

[0030] The phase number difference between the aftereffect termination interval and the migration aftereffect termination interval of the first phase interval is calculated to obtain the shortening amount of the aftereffect termination interval of the phase interval pair. The residual amount of the migration effect of the phase interval pair is obtained by summing the absolute values ​​of all sequence elements in the after-effect sequence of the power transfer migration. The aftereffect termination interval shortening and migration aftereffect residual amount for different phase interval pairs are normalized to obtain the normalized migration aftereffect residual amount and the normalized aftereffect termination interval shortening amount, respectively. Subtracting the normalized amount of the shortened aftereffect termination interval from the normalized amount of the residual aftereffect of the migration aftereffect pair in the same phase interval yields the initial cost of aftereffect cancellation. The initial cost of aftereffect cancellation represents the comprehensive evaluation result of the degree of weakening of the original power extraction aftereffect and the magnitude of the residual aftereffect after the energy extraction energy in the first phase interval is transferred to the second phase interval.

[0031] The transmission cost iteration module, based on the initial cost of aftereffect cancellation, obtains the transmission cost for different phase intervals by analyzing the unbalanced transmission distribution of available electrical energy and power balance demand energy, as well as the change of aftereffect residuals.

[0032] The processing flow of the transmission cost iteration module includes: For each phase interval pair, the first phase interval and the second phase interval are marked as the supply phase interval and the demand phase interval, respectively, and the initial cost of the aftereffect mutual cancellation is used as the transmission cost of the current round. The available electrical energy in different supply phase intervals and the power balance demand energy in different demand phase intervals are added together to obtain the total available energy and the total demand energy, respectively. Based on the total available energy, the total required energy, and the transmission cost of the current round, the first round of entropy regularization non-equilibrium optimal transmission iteration process is executed to obtain the transmission energy of different phase interval pairs in the first round; In this embodiment, the phase interval with the ability to increase power intake within a line AC cycle is regarded as the "supply side", and the phase interval that needs to supplement power is regarded as the "demand side". Suppose there are m supply phase intervals and n demand phase intervals, denoted as a. i Let b be the adjustable electrical energy for the i-th supply phase interval; j Let c be the power balance demand energy for the j-th demand phase interval;ij The initial cost of aftereffect cancellation when compensating for the energy of the j-th demand phase in the i-th supply phase interval; record γ ij The energy transferred from the i-th supply phase to the j-th demand phase interval is calculated by arranging the supply phase numbers as rows and the demand phase numbers as columns, thus obtaining the energy transfer matrix. ; Traditional balanced optimal transmission requirements: and ; However, this condition usually does not hold true in inductive power supply scenarios. For example, during a sudden load increase, the energy that can be added through inductive power supply over the entire AC cycle may only be 6 mJ, while the energy required for power balance may reach 6.3 mJ. In this case, it is not feasible to artificially require the inductive power supply side to generate a non-existent 0.3 mJ of energy. Therefore, unbalanced optimal transmission is adopted, and its basic objective function can be expressed as follows: ; in, , which is the energy vector on the supply side; , which is the energy vector on the demand side; It represents the sum of the elements in each row of the energy transfer matrix, that is, the actual increase in power intake undertaken by each supply phase interval; This represents the sum of the elements in each column of the energy transfer matrix, i.e., the actual supplementary energy obtained in each demand phase interval; Kullback-Leibler divergence is used to measure the deviation between the actual transmitted energy and the original supply or demand. This is the entropy regularization coefficient; and Do not use the supply-side quality deviation penalty coefficient and the demand-side quality deviation penalty coefficient; Specifically, when the inductive power extraction module is within its rated allowable operating range, a preset number of load power levels are set, and rising and falling steps are performed between adjacent load power levels. After each step occurs, the DC bus voltage, load current, power extraction energy in each phase interval, and energy storage exchange energy are collected within a preset number of AC cycle intervals, according to the same sampling interval as the actual control. The load power before the step, the load power after the step, the phase interval number of the step occurrence, and the above-mentioned collected data after the step are combined into a set of load step data. All data corresponding to different step amplitudes and different step occurrence phase intervals together constitute a pre-calibrated load step dataset. Unbalanced optimal transmission is performed in the preset candidate parameter group, and the parameter group with the smallest maximum deviation of the bus voltage is determined as the entropy regularization coefficient and the unbalanced quality penalty coefficient.

[0033] When solving the above energy transfer matrix, the transfer kernel is first constructed based on the initial cost of aftereffect cancellation: ; The smaller the initial cost of aftereffect cancellation, The larger the value, the higher the priority of allocating energy from the supply phase to the demand phase; initialize the supply-side scaling vector and the demand-side scaling vector: ; definition: ; ; and These represent the scaling exponents, which are jointly determined by the quality deviation penalty coefficient and the entropy regularization coefficient, respectively. Alternate updates as follows: ; ; In the formula, k represents the number of alternating updates; division and exponentiation are both element-wise operations; iteration stops when the change in the transmission result obtained from two consecutive iterations is no greater than the preset iteration convergence threshold; finally, we obtain... Thus, the transmission energy allocated from each supply phase to each demand phase can be obtained. Under the conditions of fixed line current and fixed load, the entropy regularized unbalanced optimal transmission process is repeatedly executed on the same set of supply-side energy, demand-side energy and transmission cost. After the statistical algorithm enters the stable stage, the absolute value of the difference between the corresponding transmission energies in the energy transmission matrix obtained by the two adjacent iterations is used. The absolute values ​​of the differences of all calibration results are arranged in ascending order, and the value corresponding to the 95th percentile is taken as the preset iteration convergence threshold.

[0034] The transmitted energy output from the same supply phase interval is accumulated according to the phase number to obtain the current round power extraction regulation energy of the supply phase interval; Divide the current round power extraction regulation energy of each phase interval by the preset unit power extraction energy to obtain the scaling factor. Based on the scaling factor, scale the unit power extraction aftereffect sequence of the phase interval element by element to obtain the current round power extraction aftereffect contribution sequence. For the current round power-taking effect contribution sequence in different phase intervals, the current round power-taking effect contribution in the same phase interval is accumulated according to the phase number, and the accumulated results are spliced ​​together in ascending order of phase number to obtain the current round power-taking effect residual sequence; Subtract the current cycle's power extraction adjustment energy from the adjustable electrical energy supplied in the phase interval to obtain the remaining adjustable electrical energy. The phase intervals with remaining available electrical energy greater than zero are marked as candidate phase intervals. For each candidate phase interval, the aftereffect residual-driven transmission cost analysis process is performed to obtain the next round transmission cost for different phase interval pairs. The decision-making process for the next round of entropy regularization non-equilibrium optimal transmission iteration is then determined.

[0035] The processing flow of the post-effect residual-driven transmission cost analysis process includes: The unit power-taking aftereffect sequence of the candidate phase interval is added to the power-taking aftereffect residual sequence of the current round one by one according to the same phase number to obtain the candidate trial aftereffect residual sequence; Identify the aftereffect termination intervals of the current round power-taking aftereffect residual sequence and the candidate trial aftereffect residual sequence, and mark them as the current round termination interval and the trial termination interval, respectively. It should be noted that the process of identifying the aftereffect termination interval in this step is the same as that described above, except that the features are replaced. The difference between the phase numbers of the current round termination interval and the trial termination interval is calculated to obtain the change in the candidate aftereffect termination position; For the residual sequence of the current power-taking effect and the residual sequence of the candidate trial effect, the absolute values ​​of all sequence elements are accumulated respectively, and the previous accumulation result is subtracted from the next accumulation result to obtain the candidate residual change amount. The changes in the candidate aftereffect termination position and the changes in the candidate aftereffect residual are normalized and weighted respectively to obtain the aftereffect residual feedback amount of the candidate phase interval. Specifically, the two normalized results are multiplied by the preset first cost feedback weight and the preset second cost feedback weight respectively, and then summed to obtain the aftereffect residual feedback amount of the candidate phase interval; In this embodiment, for a preset first cost feedback weight, a preset load step is applied during the calibration operation of the inductive power supply module. Under each load step, power supply adjustment for different candidate phase intervals is performed. The change in the aftereffect termination position before and after the candidate phase is added is calculated, and the corresponding maximum deviation improvement of the bus voltage is obtained. The change in the aftereffect termination position obtained from each calibration is normalized, and the normalized change in the aftereffect termination position is used as the first independent variable, and the maximum deviation improvement of the bus voltage is used as the dependent variable to perform non-negative regression fitting to obtain the first regression coefficient. For the preset second cost feedback weight, the same set of load step calibration data is used to calculate the difference in the cumulative absolute value of the aftereffect before and after the candidate phase is added, and the aftereffect residual change is obtained. The aftereffect residual change is normalized, and the normalized aftereffect residual change is used as the second independent variable. Together with the aftereffect termination position change, the bus voltage maximum deviation improvement is fitted by non-negative regression to obtain the second regression coefficient.

[0036] Select the phase interval pairs that are candidate phase intervals in the previous round, and subtract the aftereffect residual feedback amount from the current round transmission cost to obtain the next round transmission cost of the corresponding phase interval pairs.

[0037] The decision-making process for the next round of entropy-regularized non-equilibrium optimal transmission iteration includes: Repeatedly execute the entropy regularization non-equilibrium optimal transmission iterative process. After each execution, calculate the absolute value of the difference between the transmission energy in the current round and the transmission energy in the previous round for each phase interval, and record it as the transmission change energy of adjacent rounds. The energy of the transmission change in adjacent rounds of all phase intervals is determined. If the energy of the transmission change in adjacent rounds of all phase intervals is not greater than the preset transmission change threshold, the entropy regularization non-equilibrium optimal transmission iteration process is terminated and process one and process two are executed. If there is a phase interval where the energy of the transmission change in adjacent rounds is greater than the preset transmission change threshold, the next round of entropy regularization non-equilibrium optimal transmission iteration process is executed. The preset transmission change threshold is determined based on the minimum power extraction energy adjustment that the power extraction power adjustment unit can perform. When the number of iterations reaches the preset maximum number of iterations and the convergence condition has not yet been met, the round with the smallest cumulative absolute value of the aftereffect value among all completed iteration rounds is selected as the final round. When there are two or more rounds with the same minimum value, the round with the smaller round number is selected.

[0038] Step 1: Arrange the current power extraction and regulation energy of different phase intervals in ascending order of phase number to obtain the active power extraction and regulation energy sequence; Step 2: For each demand phase interval, subtract the cumulative transmission energy from all supply phase intervals to the corresponding demand phase interval in the current round from the phase power balance demand energy to obtain the unaccepted demand energy; splice the unaccepted demand energy according to the phase number to obtain the unaccepted demand energy sequence.

[0039] To address the issue that the superposition of power extraction actions in different phases may result in accumulated aftereffects, and that fixed power allocation criteria are insufficient to reflect this change, this invention establishes an initial cost for aftereffect cancellation by superimposing the difference in the aftereffect sequence of a unit power extraction, and dynamically updates the unbalanced optimal transmission cost by combining the aftereffect residual of each round of power extraction. This allows the extracted power energy to be redistributed round by round to phase combinations with shorter aftereffect durations and smaller residual amounts, thereby improving the coordination between induced power extraction power regulation and subsequent electromagnetic state changes.

[0040] The power balance control module performs compensation analysis on the available electrical energy and power balance demand energy in different phase intervals based on transmission cost, and executes active power balance control.

[0041] The processing flow of the power balance control module includes: The active power extraction regulation energy sequence and the reference phase power extraction energy sequence are added one by one according to the same phase number to obtain the target phase power extraction energy sequence; The process of accumulating unaccepted demand energy is executed, which includes accumulating unaccepted demand energy element by element to obtain the cumulative demand release energy of the bus. Each time unaccepted demand energy is accumulated, a threshold comparison process is executed. The processing flow of the threshold comparison process includes: During the threshold comparison process, the cumulative demand release energy of the bus is compared with the allowable release energy threshold of the bus. If the cumulative demand release energy of the bus is not greater than the allowable release energy threshold of the bus, the demand phase interval corresponding to the unaccepted demand energy accumulated in this instance is marked as the compensation phase interval, and the unaccepted demand energy accumulation process is repeated. If the cumulative demand release energy of the bus is greater than the allowable release energy threshold of the bus, the unaccepted demand energy accumulation process is stopped. The allowable release energy threshold of the bus is determined by obtaining the current DC bus voltage, the DC bus capacitance value, and the lower limit of the bus voltage allowed by the downstream load. The current energy stored in the bus capacitor is determined based on the current DC bus voltage, and the minimum reserved energy of the bus capacitor is determined based on the allowable lower limit of the bus voltage. The difference between the current energy stored and the minimum reserved energy is then used as the allowable release energy threshold of the bus.

[0042] Summarize the set of compensation phase intervals and filter the set of supply phase intervals where the remaining available electrical energy is greater than zero; The Cartesian product of the supply phase interval set and the compensation phase interval set is calculated to obtain several supply-compensation interval pairs; The transmission cost of each supply compensation interval pair is extracted from the final round of entropy regularization non-equilibrium optimal transmission iteration process, and the supply compensation interval pairs are arranged in ascending order of transmission cost to obtain the compensation sequence. Traverse the compensation sequence. Each time a traversal is performed, mark the obtained supply compensation interval pairs as target interval pairs and perform the energy compensation process on the target interval pairs. When the traversal of the compensation sequence is completed, the remaining adjustable electrical energy actually called in each supply phase interval is added to the corresponding active power extraction regulation energy, and the target phase power extraction energy sequence is updated. By arranging the actual compensated transmission energy in different compensation phase intervals, the energy storage compensation energy sequence is obtained; Active power balance control is performed using the target phase power extraction energy sequence and the energy storage compensation energy sequence.

[0043] The processing flow for performing energy compensation on the target interval includes: When performing the energy compensation process, the remaining available electrical energy in the supply phase interval is compared with the unmet demand energy in the compensation phase interval. If the remaining available electrical energy is greater than the unmet demand energy, then an energy value equal to the unmet demand energy is extracted from the supply phase interval and used as transmission energy to compensate the compensation phase interval. If the remaining available electrical energy is not greater than the unmet demand energy, the remaining available electrical energy will be used as transmission energy to compensate the compensation phase interval. For all supply-compensation interval pairs that are not target interval pairs, update the remaining available electrical energy of each supply phase interval and the unmet demand energy of each compensation phase interval; perform the next traversal on the compensation sequence.

[0044] The process of performing active power balance control using the target phase power extraction energy sequence and the energy storage compensation energy sequence includes: According to the increasing order of the phase number of the current line AC cycle, the target power extraction energy in the target phase power extraction energy sequence is read sequentially, and the power extraction process is executed in the corresponding phase interval by the power extraction power adjustment unit; according to the increasing order of the phase number, the energy storage compensation energy in the energy storage compensation energy sequence is read sequentially, and the discharge process is executed in the corresponding phase interval by the energy storage unit.

[0045] To address the issue of insufficient coordination between remaining inductive power extraction capacity, bus buffer capacity, and energy storage compensation when there is still unmet power demand after phase power extraction and allocation, this invention utilizes the final transmission cost to continue utilizing the remaining adjustable power extraction energy, and determines the compensation range by combining it with the bus's allowed energy release. Then, the energy storage unit undertakes the remaining demand, forming a progressive power balance process of inductive power extraction, bus energy release, and energy storage compensation, reducing unnecessary energy storage charging and discharging adjustments.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0047] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] All formulas in this manual are dimensionless and calculated numerically. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters and thresholds in the formulas are set by those skilled in the art according to the actual situation.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An active power balance control system for an inductive power extraction module of a high-voltage power distribution line, characterized in that, include: The power demand construction module divides the AC cycle of the line into phase intervals and obtains the adjustable power demand sequence and power balance demand energy sequence for each phase interval. The power extraction aftereffect characterization module applies power extraction perturbations to each phase interval to obtain the unit power extraction aftereffect sequence for different phase intervals; The aftereffect cancellation analysis module performs differential superposition and aftereffect convergence analysis on the unit power-taking aftereffect sequence in different phase intervals to obtain the initial cost of aftereffect cancellation. The transmission cost iteration module, based on the initial cost of aftereffect cancellation, obtains the transmission cost in different phase intervals by analyzing the unbalanced transmission distribution of available power energy and power balance demand energy and the change of power extraction aftereffect residual. The power balance control module performs compensation analysis on the available electrical energy and power balance demand energy in different phase intervals based on transmission cost, and executes active power balance control.

2. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 1, characterized in that, The processing flow of the power extraction aftereffect characterization module includes: A phase interval is selected sequentially as the disturbance phase interval, and a preset unit of energy is added to the reference energy taken in the disturbance phase interval; After applying a preset unit of energy harvesting, the average induced voltage of each phase interval is subtracted from the reference induced voltage of the same phase number in the reference phase induced voltage sequence to obtain the power harvesting effect difference value. The actual increase in power extraction energy is obtained by taking the actual increase in power extraction energy in the disturbance phase interval. The difference in power extraction aftereffects in the same disturbance phase interval is divided by the actual increase in power extraction energy to obtain the unit power extraction aftereffect value. Starting from the perturbation phase interval, the unit power-out aftereffect values ​​of different phase intervals are spliced ​​together in ascending order of phase number to obtain the unit power-out aftereffect sequence; Starting from the end of the unit power-out aftereffect sequence, perform a reverse traversal to identify continuous unit power-out aftereffect value segments where the absolute value of each unit power-out aftereffect value is not greater than a preset aftereffect convergence threshold. The phase interval with the smallest phase number in the continuous unit power-out aftereffect value segment is marked as the aftereffect termination interval; Different phase intervals are selected as disturbance phase intervals, and each phase interval is obtained as the unit power-out aftereffect sequence and aftereffect termination interval under the disturbance phase interval.

3. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 2, characterized in that, The processing flow of the aftereffect cancellation analysis module includes: Perform a self-Cartesian product calculation on the set of phase intervals to obtain several pairs of phase intervals, and remove the phase interval pairs that have the same phase intervals; For each pair of phase intervals, the two phase intervals are marked as the first phase interval and the second phase interval respectively according to the ascending order of the phase numbers; For each sequence element of the unit power take-off effect sequence in the second phase interval, subtract the sequence elements with the same phase number in the corresponding unit power take-off effect sequence in the first phase interval from each sequence element to obtain the power take-off migration effect sequence. Identify the termination interval of the aftereffect sequence of power-taking migration and mark it as the termination interval of the aftereffect of migration. The phase number difference between the aftereffect termination interval and the migration aftereffect termination interval of the first phase interval is calculated to obtain the shortening amount of the aftereffect termination interval of the phase interval pair. The residual amount of the migration effect of the phase interval pair is obtained by summing the absolute values ​​of all sequence elements in the after-effect sequence of the power transfer migration. The aftereffect termination interval shortening and migration aftereffect residual amount for different phase interval pairs are normalized to obtain the normalized migration aftereffect residual amount and the normalized aftereffect termination interval shortening amount, respectively. Subtracting the normalized amount of the aftereffect shortening of the aftereffect termination interval from the normalized amount of the aftereffect residual of the same phase interval pair yields the initial cost of aftereffect cancellation.

4. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 3, characterized in that, The processing flow of the transmission cost iteration module includes: For each phase interval pair, the first phase interval and the second phase interval are marked as the supply phase interval and the demand phase interval, respectively, and the initial cost of the aftereffect mutual cancellation is used as the transmission cost of the current round. The available electrical energy in different supply phase intervals and the power balance demand energy in different demand phase intervals are added together to obtain the total available energy and the total demand energy, respectively. Based on the total available energy, the total required energy, and the transmission cost of the current round, the first round of entropy regularization non-equilibrium optimal transmission iteration process is executed to obtain the transmission energy of different phase interval pairs in the first round; The transmitted energy output from the same supply phase interval is accumulated according to the phase number to obtain the current round power extraction regulation energy of the supply phase interval; Divide the current round power extraction regulation energy of each phase interval by the preset unit power extraction energy to obtain the scaling factor. Based on the scaling factor, scale the unit power extraction aftereffect sequence of the phase interval element by element to obtain the current round power extraction aftereffect contribution sequence. For the current round power-taking effect contribution sequence in different phase intervals, the current round power-taking effect contribution in the same phase interval is accumulated according to the phase number, and the accumulated results are spliced ​​together in ascending order of phase number to obtain the current round power-taking effect residual sequence; Subtract the current cycle's power extraction adjustment energy from the adjustable electrical energy supplied in the phase interval to obtain the remaining adjustable electrical energy. The phase intervals with remaining available electrical energy greater than zero are marked as candidate phase intervals. For each candidate phase interval, the aftereffect residual-driven transmission cost analysis process is performed to obtain the next round transmission cost for different phase interval pairs. The decision-making process for the next round of entropy regularization non-equilibrium optimal transmission iteration is then determined.

5. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 4, characterized in that, The processing flow of the post-effect residual-driven transmission cost analysis process includes: The unit power-taking aftereffect sequence of the candidate phase interval is added to the power-taking aftereffect residual sequence of the current round one by one according to the same phase number to obtain the candidate trial aftereffect residual sequence; Identify the aftereffect termination intervals of the current round power-taking aftereffect residual sequence and the candidate trial aftereffect residual sequence, and mark them as the current round termination interval and the trial termination interval, respectively. The difference between the phase numbers of the current round termination interval and the trial termination interval is calculated to obtain the change in the candidate aftereffect termination position; For the residual sequence of the current power-taking effect and the residual sequence of the candidate trial effect, the absolute values ​​of all sequence elements are accumulated respectively, and the previous accumulation result is subtracted from the next accumulation result to obtain the candidate residual change amount. The changes in the candidate aftereffect termination position and the changes in the candidate aftereffect residual are normalized and weighted respectively to obtain the aftereffect residual feedback amount of the candidate phase interval. Select the phase interval pairs that are candidate phase intervals in the previous round, and subtract the aftereffect residual feedback amount from the current round transmission cost to obtain the next round transmission cost of the corresponding phase interval pairs.

6. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 5, characterized in that, The decision-making process for the next round of entropy-regularized non-equilibrium optimal transmission iteration includes: Repeatedly execute the entropy regularization non-equilibrium optimal transmission iterative process. After each execution, calculate the absolute value of the difference between the transmission energy in the current round and the transmission energy in the previous round for each phase interval, and record it as the transmission change energy of adjacent rounds. The energy of the transmission change in adjacent rounds of all phase intervals is determined. If the energy of the transmission change in adjacent rounds of all phase intervals is not greater than the preset transmission change threshold, the entropy regularization non-equilibrium optimal transmission iteration process is terminated and process one and process two are executed. If there is a phase interval where the energy of the transmission change in adjacent rounds is greater than the preset transmission change threshold, the next round of entropy regularization non-equilibrium optimal transmission iteration process is executed. Step 1: Arrange the current power extraction and regulation energy of different phase intervals in ascending order of phase number to obtain the active power extraction and regulation energy sequence; Step 2: For each demand phase interval, subtract the cumulative transmission energy from all supply phase intervals to the corresponding demand phase interval in the current round from the phase power balance demand energy to obtain the unaccepted demand energy; splice the unaccepted demand energy according to the phase number to obtain the unaccepted demand energy sequence.

7. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 6, characterized in that, The processing flow of the power balance control module includes: The active power extraction regulation energy sequence and the reference phase power extraction energy sequence are added one by one according to the same phase number to obtain the target phase power extraction energy sequence; The process of accumulating unmet demand energy is executed, including accumulating unmet demand energy element by element to obtain the cumulative demand release energy of the bus. Each time unmet demand energy is accumulated, a threshold comparison process is executed to extract the compensation phase interval. Summarize the set of compensation phase intervals and filter the set of supply phase intervals where the remaining available electrical energy is greater than zero; The Cartesian product of the supply phase interval set and the compensation phase interval set is calculated to obtain several supply-compensation interval pairs; The transmission cost of each supply compensation interval pair is extracted from the final round of entropy regularization non-equilibrium optimal transmission iteration process, and the supply compensation interval pairs are arranged in ascending order of transmission cost to obtain the compensation sequence. Traverse the compensation sequence. Each time a traversal is performed, mark the obtained supply compensation interval pairs as target interval pairs and perform the energy compensation process on the target interval pairs. When the traversal of the compensation sequence is completed, the remaining adjustable electrical energy actually called in each supply phase interval is added to the corresponding active power extraction regulation energy, and the target phase power extraction energy sequence is updated. By arranging the actual compensated transmission energy in different compensation phase intervals, the energy storage compensation energy sequence is obtained; Active power balance control is performed using the target phase power extraction energy sequence and the energy storage compensation energy sequence.

8. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 7, characterized in that, The processing flow of the threshold comparison process includes: Compare the cumulative demand energy released by the busbar with the allowable energy release threshold of the busbar; If the cumulative demand release energy of the bus is not greater than the allowable release energy threshold of the bus, then the demand phase interval corresponding to the unaccepted demand energy accumulated in this time is marked as the compensation phase interval, and the unaccepted demand energy accumulation process is repeated. If the cumulative demand energy released by the bus exceeds the allowable energy release threshold of the bus, the process of accumulating unaccepted demand energy will be stopped.

9. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 8, characterized in that, The processing flow for performing energy compensation on the target interval includes: When performing the energy compensation process, the remaining available electrical energy in the supply phase interval is compared with the unmet demand energy in the compensation phase interval. If the remaining available electrical energy is greater than the unmet demand energy, then an energy value equal to the unmet demand energy is extracted from the supply phase interval and used as transmission energy to compensate the compensation phase interval. If the remaining available electrical energy is not greater than the unmet demand energy, the remaining available electrical energy will be used as transmission energy to compensate the compensation phase interval. For all supply-compensation interval pairs that are not target interval pairs, update the remaining available electrical energy of each supply phase interval and the unmet demand energy of each compensation phase interval; perform the next traversal on the compensation sequence.

10. The active power balance control system for the high-voltage distribution line inductive power extraction module according to claim 9, characterized in that, The process of performing active power balance control using the target phase power extraction energy sequence and the energy storage compensation energy sequence includes: According to the increasing order of the phase number of the current line AC cycle, the target power energy in the target phase power energy sequence is read sequentially, and the power extraction process is executed in the corresponding phase interval by the power extraction power adjustment unit. Following the increasing order of phase numbers, the energy storage compensation energy in the energy storage compensation energy sequence is read sequentially, and the energy storage unit performs the discharge process in the corresponding phase interval.

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