An embedded intelligent voltage regulating system with dynamic impedance matching and harmonic collaborative suppression

Abstract

The application discloses an embedded intelligent voltage regulating system with dynamic impedance matching and harmonic collaborative suppression, and relates to the technical field of voltage regulating of power distribution networks. The embedded intelligent voltage regulating system comprises an inversion marking module, an impedance and harmonic identification module, a traction matching module, an excitation execution module and a state verification module. The inversion marking module obtains inversion output operation data of a flexible voltage regulator, marks an inversion state position, and outputs inversion end marking data. The impedance and harmonic identification module identifies load impedance variation and characteristic harmonic distribution, and generates impedance harmonic data. The traction matching module performs traction correlation analysis on the load impedance variation and the characteristic harmonic distribution in the impedance harmonic data, and forms traction control data. The excitation execution module accesses control relationship arrangement and excitation regulation relationship arrangement, and generates impedance execution data. The state verification module verifies the inversion output state of the flexible voltage regulator according to the impedance execution data, collects results, and outputs voltage regulating result data. The embedded intelligent voltage regulating system realizes collaborative execution of dynamic impedance matching and characteristic harmonic traction by accessing control relationship arrangement and excitation regulation relationship arrangement.

Description

Technical Field

[0001] This invention relates to the field of voltage regulation technology in power distribution networks, and in particular to an intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression. Background Technology

[0002] In recent years, with the continuous increase of distributed photovoltaic, small hydropower, frequency converter-driven loads, impulsive industrial loads, and power electronic loads in low-voltage distribution networks, voltage fluctuations, three-phase load changes, and harmonic disturbances on the distribution side have shown stronger dynamic coupling characteristics. Flexible voltage regulators, as an important power electronic voltage regulation component in power distribution network regulation, typically achieve continuous voltage regulation through rectification, inversion, and compensation voltage output, and are gradually developing towards inverter output status sensing, load impedance adaptation, power quality management, and voltage regulation result verification. In power distribution control-related technologies, the inverter output side operating status, load connection changes, output waveform characteristics, and dynamic impedance bearing capacity of flexible voltage regulators have become important factors affecting the voltage stability and power supply quality of distribution networks.

[0003] However, existing methods in intelligent voltage regulation often focus on compensating for voltage amplitude adjustment, lacking a unified analysis of the relationship between the load impedance change on the inverter output side and the characteristic harmonic distribution. This makes it difficult to transform the impedance acceptance requirements and characteristic harmonic traction requirements into a linkage control relationship of dynamic impedance branches, thus affecting the impedance matching continuity and harmonic synergistic suppression capability of flexible voltage regulators in complex load access scenarios. Summary of the Invention

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

[0005] Therefore, this invention provides an intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression to solve the problem of difficulty in synergistic impedance matching and characteristic harmonic suppression on the inverter output side in the field of power distribution voltage regulation.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] This invention provides an intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression, comprising: an inverter marking module, which acquires inverter output operating data of a flexible voltage regulator, marks the inverter state position, and outputs inverter end marking data; an impedance harmonic identification module, which identifies load impedance changes and characteristic harmonic distributions from the inverter end marking data, and aggregates the load impedance changes and characteristic harmonic distributions according to the positional correspondence in the inverter end marking data to generate impedance harmonic data; and a traction matching module, which performs traction correlation analysis on the load impedance changes and characteristic harmonic distributions in the impedance harmonic data, outputs the load impedance influence relationship, and matches the flexible voltage regulator according to the load impedance change and characteristic harmonic distribution. The impedance connection method and characteristic harmonic traction direction of the dynamic impedance branch form traction control data. The excitation execution module, according to the traction control data, performs connection control relationship arrangement and excitation adjustment relationship arrangement for the high-speed insulated gate bipolar transistor and the four-quadrant adjustable reactor in the dynamic impedance branch, forming excitation linkage data. Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to switch the connection path of the dynamic impedance branch, and the four-quadrant adjustable reactor is driven to adjust the equivalent reactance in the connection path, generating impedance execution data. The status verification module performs status verification and result collection on the inverter output status of the flexible voltage regulator based on the impedance execution data, and outputs voltage regulation result data.

[0008] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the inverter output operating data includes voltage data, current data, waveform data, and load connection change data on the inverter output side of the flexible voltage regulator.

[0009] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for marking the output inverter terminal data are as follows:

[0010] The voltage, current and waveform data in the inverter output operation data are divided into state segments according to the acquisition time sequence to determine the voltage connection segment, current change segment and waveform change segment.

[0011] Mark the acquisition location of the voltage receiving segment as the voltage receiving location, the acquisition location of the current change segment as the current change location, and the acquisition location of the waveform change segment as the waveform change location.

[0012] Write the voltage connection position, current change position, and waveform change position into the inverter output operation data, and output inverter terminal marking data.

[0013] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for identifying load impedance changes and characteristic harmonic distributions are as follows:

[0014] Based on the position correspondence in the inverter terminal marking data, the voltage data, current data, and load connection change data are collected and organized to form voltage and current connection data.

[0015] Perform load connection offset analysis on voltage and current connection data before and after load connection to identify the amplitude and phase offset between voltage and current data and determine the load impedance change;

[0016] Based on the load impedance change, waveform data corresponding to the acquisition location is extracted from the inverter terminal marking data, and the harmonic components in the waveform data are identified and calibrated to determine the characteristic harmonic distribution.

[0017] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for generating impedance harmonic data are as follows:

[0018] According to the position correspondence in the inverter terminal marking data, the load impedance change and characteristic harmonic distribution are linked to the matching acquisition position to form impedance harmonic position data;

[0019] The load impedance changes and characteristic harmonic distributions in the impedance harmonic location data are correlated and organized to generate impedance harmonic data.

[0020] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for the output receiving influence relationship are as follows:

[0021] Load impedance changes and characteristic harmonic distributions are read from impedance harmonic data, and an impedance harmonic control group is established between load impedance changes and characteristic harmonic distributions at the same acquisition location.

[0022] The direction of load impedance change and the strength of characteristic harmonic distribution in the control group are compared in the same position to determine the state of characteristic harmonic distribution at the load impedance change point, thus forming the data on the influence of the resistance harmonics.

[0023] The enhanced, weakened, and offset states in the harmonic influence data are calibrated and the influence relationship is output.

[0024] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for generating traction control data are as follows:

[0025] The relationship analysis is performed on the enhanced state, weakened state and offset state in the inheritance influence relationship to determine the inheritance direction, inheritance strength and inheritance position corresponding to the inheritance influence relationship, and to form inheritance characteristic data;

[0026] Based on the characteristic data of the acceptance, the impedance connection order of the dynamic impedance branch in the flexible voltage regulator, the direction of the change of equivalent reactance and the harmonic traction object, the impedance acceptance method and the characteristic harmonic traction direction are determined.

[0027] The impedance connection method and characteristic harmonic traction direction are arranged into a control chain according to the connection position to form traction control data.

[0028] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for generating excitation linkage data are as follows:

[0029] The impedance connection methods in the traction control data are broken down into impedance increase connection, impedance decrease connection and impedance hold connection, and the connection position corresponding to each impedance connection method is marked to form access requirement data.

[0030] Based on the access demand data, the system configures access, bypass, and hold actions for the high-speed insulated gate bipolar transistors in the dynamic impedance branch, arranges them in sequence, and outputs access control relationship data.

[0031] The receiving position in the access control relationship data is connected with the characteristic harmonic traction direction in the traction control data, and the excitation enhancement action, excitation weakening action, and excitation holding action of the four-quadrant adjustable reactor are configured according to the characteristic harmonic traction direction to form excitation regulation relationship data.

[0032] The access control relationship data and excitation regulation relationship data are linked and organized according to the same connection position, and the excitation linkage data is output.

[0033] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for generating impedance execution data are as follows:

[0034] Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to perform access, bypass and hold actions, and the access path of the dynamic impedance branch is recorded to form path switching data;

[0035] In the access path of path switching data, the four-quadrant adjustable reactor is driven to perform excitation adjustment according to the excitation adjustment relationship in the excitation linkage data, and the equivalent reactance adjustment state in the access path is recorded as reactance adjustment data.

[0036] The path switching data and reactance adjustment data are combined to generate impedance execution data.

[0037] As a preferred embodiment of the intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression described in this invention, the specific steps for outputting the voltage regulation result data are as follows:

[0038] Align the access path and equivalent reactance adjustment state in the impedance execution data with the inverter output state of the flexible voltage regulator according to the acquisition position, and compare the changes in voltage data and current data corresponding to the access path and the changes in characteristic harmonic distribution corresponding to the equivalent reactance adjustment state, and output state comparison data.

[0039] The state comparison data is marked with consistency and deviation, and the access path, equivalent reactance adjustment state, inverter output state change, consistency mark and deviation mark are written into the same voltage regulation record to form voltage regulation result data.

[0040] The beneficial effects of this invention are as follows: By arranging access control relationships and excitation regulation relationships, the coordinated execution of dynamic impedance matching and characteristic harmonic traction is achieved. By splitting the impedance acceptance mode in the traction control data into impedance increase acceptance, impedance decrease acceptance, and impedance hold acceptance, and forming access control relationship data according to the acceptance position, while simultaneously converting the characteristic harmonic traction direction into excitation enhancement action, excitation weakening action, and excitation hold action, excitation regulation relationship data is formed. This allows the access path switching of the high-speed insulated gate bipolar transistor and the equivalent reactance adjustment of the four-quadrant adjustable reactor to be executed in conjunction at the same acceptance position, thereby improving the impedance acceptance stability, characteristic harmonic traction consistency, and verifiability of the voltage regulation result data in the inverter output state of the flexible voltage regulator. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a block diagram of an intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression.

[0043] Figure 2 A flowchart for generating impedance harmonic data.

[0044] Figure 3 This is a flowchart for outputting traction control data.

[0045] Figure 4 A flowchart for generating impedance execution data.

[0046] Figure 5 This is a data graph showing the characteristic harmonic traction effect curve.

[0047] Figure 6 This is a chart comparing the mean values ​​of key indicators for the disturbance window. Detailed Implementation

[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] Reference Figures 1-6 As one embodiment of the present invention, this embodiment provides an intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression, comprising the following steps:

[0050] The inverter marking module acquires the inverter output operation data of the flexible voltage regulator, marks the inverter status position, and outputs the inverter end marking data.

[0051] The voltage, current, and waveform data in the inverter output operation data are divided into state segments according to the acquisition time sequence to determine the voltage continuity segment, current change segment, and waveform change segment.

[0052] Specifically, the voltage, current, and waveform data from the inverter output operation data are read. The voltage, current, and waveform data are arranged in the order of acquisition time. The voltage, current, and waveform data corresponding to the same acquisition time are grouped into the same time recording position. The amplitude continuity of the voltage data, the direction of change of the current data, and the shape change of the waveform data are checked point by point along the time recording position. The continuous acquisition interval of voltage data that maintains continuous voltage regulation output, consistent amplitude change direction, and reflects the continuous process of compensation voltage on the inverter output side between adjacent time recording positions is classified as voltage continuity segment. The continuous acquisition interval of current data that shows a change in change direction, a jump in change amplitude, and a change in continuity trend before and after load connection changes is classified as current change segment. The continuous acquisition interval of waveform data that shows fundamental wave shape shift, waveform distortion change, and concentration of harmonic disturbances is classified as waveform change segment.

[0053] Furthermore, when the flexible voltage regulator is in power supply and distribution voltage regulation operation, a voltage transformer or voltage sampling circuit is arranged on the compensation voltage output path of the inverter output side of the flexible voltage regulator to collect voltage data, and a current transformer or Hall current sensor is arranged in the inverter output side circuit to collect current data. Waveform acquisition boards are connected after the voltage sampling terminal and the current sampling terminal to obtain waveform data. Load connection change data is collected at the load connection switch, load branch terminal or load monitoring circuit to form load connection change data. The voltage regulator controller synchronously records the voltage data, current data, waveform data and load connection change data in the same acquisition time sequence to form the inverter output operation data of the flexible voltage regulator.

[0054] The acquisition location of the voltage receiving segment is marked as the voltage receiving location, the acquisition location of the current change segment is marked as the current change location, and the acquisition location of the waveform change segment is marked as the waveform change location.

[0055] Specifically, the voltage receiving segment, current change segment, and waveform change segment correspond to the continuous acquisition intervals in the inverter output operating data. The corresponding acquisition positions are determined according to the start boundary, continuation boundary, and end boundary of the continuous acquisition interval in the acquisition time sequence. The acquisition position corresponding to the voltage receiving segment is written into the acquisition position record of the voltage data, and the acquired position after writing is marked as the voltage receiving position. The acquisition position corresponding to the current change segment is written into the acquisition position record of the current data, and the acquired position after writing is marked as the current change position. The acquisition position corresponding to the waveform change segment is written into the acquisition position record of the waveform data, and the acquired position after writing is marked as the waveform change position.

[0056] Write the voltage connection position, current change position, and waveform change position into the inverter output operation data, and output inverter terminal marking data.

[0057] Specifically, the voltage connection position, current change position, and waveform change position have been recorded as acquisition positions corresponding to the voltage, current, and waveform data, respectively. The voltage connection position is written into the record corresponding to the voltage data in the inverter output operation data according to the acquisition time sequence; the current change position is written into the record corresponding to the current data in the inverter output operation data; and the waveform change position is written into the record corresponding to the waveform data in the inverter output operation data. The written inverter output operation data retains the acquisition time correspondence between the voltage, current, waveform data, and load connection change data, and generates position marker records for the voltage connection position, current change position, and waveform change position at the same acquisition time. These position marker records are then organized with the inverter output operation data according to the acquisition time sequence to output inverter-side marker data.

[0058] The impedance harmonic identification module identifies load impedance changes and characteristic harmonic distributions from the inverter terminal marking data, and aggregates the load impedance changes and characteristic harmonic distributions according to the positional correspondence in the inverter terminal marking data to generate impedance harmonic data.

[0059] Based on the positional correspondence in the inverter terminal marking data, the voltage data, current data, and load connection change data are collected and organized to form voltage and current connection data.

[0060] Specifically, the position correspondence in the inverter terminal marking data includes the acquisition positions corresponding to voltage connection positions, current change positions, and load connection change data. According to the acquisition time sequence, the voltage data corresponding to the voltage connection position, the current data corresponding to the current change position, and the load connection change data under the same acquisition position are grouped into the same connection record. In the same connection record, the voltage connection position corresponding to the voltage data, the current change position corresponding to the current data, and the load connection change position corresponding to the load connection change data are marked, so that the load connection, load disconnection, and load capacity change can maintain positional correspondence with the voltage connection state and current change state of the inverter output side. The connection records formed in the acquisition time sequence are arranged continuously to form voltage and current connection data.

[0061] Perform load connection offset analysis on voltage and current connection data before and after load connection to identify amplitude and phase offset between voltage and current data and determine load impedance changes.

[0062] Specifically, the voltage and current connection data are divided into connection records before and after load connection according to the load connection change position. The amplitude, phase, and phase values ​​of voltage and current data are obtained from the connection records before load connection, and from the connection records after load connection. The change in the ratio of the voltage and current amplitudes after load connection relative to the ratio before load connection is calculated to obtain the amplitude offset. The change in the phase difference between the voltage and current phases after load connection relative to the phase difference before load connection is calculated to obtain the phase offset. The amplitude and phase offsets are then written into the voltage and current connection data according to the load connection change position to determine the load impedance change.

[0063] The formula for calculating amplitude offset is:

[0064] ;

[0065] The formula for calculating the phase offset is as follows:

[0066] ;

[0067] in, This indicates the identifier for the record taken after the load is connected. This indicates the identifier for the record taken before the load is connected. Indicates the amplitude offset. This indicates the amplitude of the voltage data recorded after the load is connected. This indicates the amplitude of the current data recorded after the load is connected. This indicates the amplitude of the voltage data recorded before the load was connected. This indicates the amplitude of the current data recorded before the load was connected. This indicates the phase offset. This indicates the phase value of the voltage data received after the load is connected. This indicates the phase value of the current data recorded after the load is connected. This indicates the phase value of the voltage data recorded before the load was connected. This indicates the phase value of the current data recorded before the load was connected.

[0068] Based on the load impedance change, waveform data corresponding to the acquisition location is extracted from the inverter terminal marking data, and the harmonic components in the waveform data are identified and calibrated to determine the characteristic harmonic distribution.

[0069] Specifically, load impedance changes correspond to the load connection change location in the voltage and current connection data. The waveform change location at the same acquisition location is matched in the inverter terminal marking data according to the load connection change location, and the waveform data corresponding to the waveform change location is extracted. The voltage and current waveforms in the waveform data are separated into fundamental components to determine the frequency position and amplitude of the fundamental component. The harmonic components are labeled according to the frequency multiples between the frequency components other than the fundamental component and the fundamental component. The harmonic component's order, the proportion of its amplitude to the fundamental component's amplitude, the acquisition location corresponding to the harmonic component, and the continuous acquisition interval covered by the harmonic component are written into the same distribution record. The harmonic components in the distribution record that coincide with the load connection change location or cover adjacent acquisition locations before and after the load connection change location are used as calibration objects for the characteristic harmonic distribution. The order distribution, position distribution, and amplitude ratio distribution of each calibration object are organized according to the acquisition time sequence, and the characteristic harmonic distribution is output.

[0070] It should be noted that the separation of the fundamental components of voltage and current waveforms in the waveform data is accomplished using a digital phase-locked loop (PLL) and a sliding discrete Fourier transform (SFT). The PLL tracks the continuous phase changes and frequency shifts in the voltage and current waveforms according to the acquisition time sequence to determine the frequency position of the fundamental component, and uses the phase position of the fundamental component as the reference for the sliding calculation. The SFT extracts voltage and current waveform sampling sequences covering the complete fundamental period according to the frequency position of the fundamental component, and then performs the separation of the voltage and current waveform sampling sequences respectively. Frequency component decomposition is performed to extract the fundamental frequency component, fifth harmonic component, seventh harmonic component, and harmonic components of orders higher than the seventh. The amplitude of the fundamental frequency component obtained by sliding discrete Fourier transform is taken as the amplitude of the fundamental frequency component. Frequency components other than the fundamental frequency component that correspond to the fundamental frequency component in an integer multiple relationship are taken as harmonic components, and the order of the harmonic components is marked according to the frequency multiple relationship. The order, amplitude, proportion of amplitude to fundamental frequency component amplitude, and corresponding waveform type of each harmonic component at the same acquisition location are written into the distribution record to provide a frequency source for determining the characteristic harmonic distribution.

[0071] Based on the position correspondence in the inverter terminal marking data, the load impedance change and characteristic harmonic distribution are linked to the matching acquisition position to form impedance harmonic position data.

[0072] Specifically, based on the load connection change position corresponding to the load impedance change, the voltage connection position and current change position at the same position in the acquisition time sequence are found, and the load impedance change is written into the position matching connection record; based on the position distribution in the characteristic harmonic distribution, the waveform change position corresponding to the same acquisition time sequence is found, and the characteristic harmonic distribution is written into the position matching waveform record; the connection record written for load impedance change and the waveform record written for characteristic harmonic distribution are merged according to the same acquisition position, so that the same acquisition position corresponds to both load impedance change and characteristic harmonic distribution, forming impedance harmonic position data.

[0073] The load impedance changes and characteristic harmonic distributions in the impedance harmonic location data are correlated and organized to generate impedance harmonic data.

[0074] Specifically, the acquisition positions in the impedance harmonic location data are checked item by item according to the acquisition time sequence. Load impedance changes and characteristic harmonic distributions at the same acquisition position are grouped into the same impedance harmonic association record. The amplitude offset and phase offset corresponding to the load impedance change, as well as the order distribution, position distribution, and amplitude ratio distribution corresponding to the characteristic harmonic distribution, are written into the impedance harmonic association record. The direction of amplitude offset change, phase offset change, and amplitude ratio distribution change in adjacent impedance harmonic association records are compared according to the acquisition position sequence. When the acquisition positions corresponding to adjacent impedance harmonic association records are continuous, and there are corresponding contents for both load impedance changes and characteristic harmonic distributions, the adjacent impedance harmonic association records are concatenated into the same impedance harmonic association sequence according to the acquisition time sequence. The impedance harmonic association sequence is organized according to the acquisition position, load impedance change, characteristic harmonic distribution, and change direction to generate impedance harmonic data.

[0075] The traction matching module performs traction correlation analysis on the load impedance changes and characteristic harmonic distribution in the impedance harmonic data, outputs the bearing influence relationship, and matches the impedance bearing mode and characteristic harmonic traction direction of the dynamic impedance branch in the flexible voltage regulator according to the bearing influence relationship, thus forming traction control data.

[0076] Load impedance changes and characteristic harmonic distributions are read from impedance harmonic data, and an impedance harmonic control group is established between load impedance changes and characteristic harmonic distributions at the same acquisition location.

[0077] Specifically, load impedance changes and characteristic harmonic distributions corresponding to each acquisition location are extracted from the impedance harmonic data in chronological order of acquisition time. Load impedance changes and characteristic harmonic distributions at the same acquisition location are written into the same control record. The amplitude and phase offsets corresponding to the load impedance changes, as well as the order distribution, position distribution, and amplitude ratio distribution corresponding to the characteristic harmonic distribution, are retained in the control record. The control records are arranged in chronological order of acquisition time to establish an impedance harmonic control group between load impedance changes and characteristic harmonic distributions.

[0078] The direction of load impedance change and the strength of characteristic harmonic distribution in the impedance control group are compared in the same position to determine the state of characteristic harmonic distribution at the load impedance change point, thus forming impedance influence data.

[0079] Specifically, load impedance changes and characteristic harmonic distributions at the same acquisition location in the harmonic control group are selected. The amplitude and phase offsets of the load impedance changes are compared item by item with the amplitude and phase offsets at adjacent acquisition locations to obtain the direction of load impedance changes. The amplitude ratio distribution of the characteristic harmonic distribution is compared item by item with the amplitude ratio distribution at adjacent acquisition locations to obtain the strength of the characteristic harmonic distribution. At the same acquisition location, the load impedance change direction and the strength of the characteristic harmonic distribution are compared accordingly. When the load impedance change direction increases and the strength of the characteristic harmonic distribution increases simultaneously, it is labeled as an enhanced state. When the load impedance change direction increases and the strength of the characteristic harmonic distribution decreases, it is labeled as a weakened state. When the position distribution of the characteristic harmonic distribution deviates from the acquisition location corresponding to the load impedance change, it is labeled as an offset state. The acquisition location, load impedance change direction, characteristic harmonic distribution strength, enhanced state, weakened state, and offset state are grouped into the same record to form harmonic influence data.

[0080] It should be noted that the enhanced, weakened, and offset states are determined according to the calibration order of position verification taking precedence over strength verification. At the same acquisition location, the location distribution of the characteristic harmonics is checked against the acquisition location corresponding to the load impedance change. If a deviation exists, the harmonic influence state is calibrated as an offset state, and the increase or decrease in the strength of the characteristic harmonic distribution is recorded as the corresponding strength change content in the same record. If no deviation exists, the correspondence between the load impedance change direction and the characteristic harmonic distribution strength is checked. If the load impedance change direction increases and the characteristic harmonic distribution strength increases synchronously, the harmonic influence state is calibrated as an enhanced state; if the load impedance change direction increases and the characteristic harmonic distribution strength decreases, the harmonic influence state is calibrated as a weakened state.

[0081] The enhanced, weakened, and offset states in the harmonic influence data are calibrated and the influence relationship is output.

[0082] Specifically, records corresponding to the enhanced, weakened, and offset states are extracted from the harmonic influence data. The enhanced state is marked with an enhanced acceptance tag according to the acquisition location, and the load impedance change direction, characteristic harmonic distribution strength, order distribution, and amplitude ratio distribution corresponding to the enhanced state are grouped into the same acceptance record. The weakened state is marked with a weakened acceptance tag according to the acquisition location, and the load impedance change direction, characteristic harmonic distribution strength, order distribution, and amplitude ratio distribution corresponding to the weakened state are grouped into the same acceptance record. The offset state is marked with an offset acceptance tag according to the acquisition location, and the load impedance change direction, characteristic harmonic distribution position distribution, and deviation position corresponding to the offset state are grouped into the same acceptance record. The acceptance records with enhanced, weakened, and offset acceptance tags are arranged in chronological order of acquisition time, and the acceptance influence relationship is output.

[0083] The relationship analysis is performed on the enhanced state, weakened state and offset state in the inheritance influence relationship to determine the inheritance direction, inheritance strength and inheritance position corresponding to the inheritance influence relationship, and to form inheritance characteristic data.

[0084] Specifically, the connection records in the connection influence relationship are analyzed separately according to the enhanced connection mark, weakened connection mark, and offset connection mark. For connection records with enhanced connection marks, the connection direction is the synchronous change direction of the load impedance change direction and the characteristic harmonic distribution strength, the connection strength is the change amplitude of the amplitude ratio distribution, and the connection position is the acquisition position of the enhanced connection mark. For connection records with weakened connection marks, the connection direction is the opposite change direction of the load impedance change direction and the characteristic harmonic distribution strength, the connection strength is the change amplitude of the amplitude ratio distribution, and the connection position is the acquisition position of the weakened connection mark. For connection records with offset connection marks, the connection direction is the deviation of the position distribution from the load impedance change position, the connection strength is the acquisition position interval between the deviation position and the load impedance change position, and the connection position is the acquisition position of the offset connection mark. The connection direction, connection strength, and connection position are written into the same connection record to form connection feature data.

[0085] Based on the characteristic data of the impedance connection sequence of the dynamic impedance branch in the flexible voltage regulator, the direction of equivalent reactance change, and the harmonic traction object, the impedance connection method and the characteristic harmonic traction direction are determined.

[0086] Specifically, the impedance connection order of the dynamic impedance branch is determined according to the sequence number of the connection position in the data acquisition time sequence. The connection position with the smaller sequence number is connected first, and the connection position with the larger sequence number is connected later. The equivalent reactance change direction is determined according to the connection direction and connection strength. When the connection direction corresponds to the synchronous change direction and the connection strength corresponds to harmonic enhancement, the equivalent reactance change direction is matched as the increasing direction. When the connection direction corresponds to the opposite change direction and the connection strength corresponds to harmonic weakening, the equivalent reactance change direction is matched as the decreasing direction. When the connection strength does not change, the equivalent reactance change direction is matched as the maintaining direction. The harmonic traction object is determined according to the order distribution and amplitude ratio distribution corresponding to the connection position, and the characteristic harmonic traction direction is determined according to the position distribution of the harmonic traction object in the data acquisition time sequence. The impedance connection order and the equivalent reactance change direction are used as the impedance connection method.

[0087] Furthermore, the frequency of each harmonic component is read according to the frequency distribution corresponding to the receiving position, and the harmonic components under the same receiving position are sorted according to the amplitude ratio distribution. The harmonic component with the largest amplitude ratio distribution value is identified as the harmonic traction object. When there are multiple harmonic components with the same amplitude ratio distribution value, the harmonic component with the largest continuous acquisition interval length covering the receiving position is identified as the harmonic traction object. When the position distribution of the harmonic traction object is before the receiving position, the characteristic harmonic traction direction is marked as pointing from the position distribution of the harmonic traction object to the receiving position. When the position distribution of the harmonic traction object covers the receiving position, the characteristic harmonic traction direction is marked as traction around the receiving position. When the position distribution of the harmonic traction object is after the receiving position, the characteristic harmonic traction direction is marked as pointing from the receiving position to the position distribution of the harmonic traction object.

[0088] It should be noted that the dynamic impedance branch includes the controllable impedance access path arranged in the compensation voltage output path on the inverter output side. The impedance access order indicates the order in which the dynamic impedance branch performs its access, bypass, and hold actions at different connection positions. It does not require the dynamic impedance branch to be multiple independent branches. When multiple connection positions correspond to the same dynamic impedance branch, the execution order of the same dynamic impedance branch is determined according to the sequence number of the connection positions in the acquisition time sequence. When multiple connection positions correspond to different controllable impedance access paths, the access order of the different controllable impedance access paths is determined according to the sequence number.

[0089] The direction of change of equivalent reactance is determined based on the order distribution of the harmonic traction object and the impedance frequency characteristics of the four-quadrant adjustable reactor. The higher the order of the harmonic traction object, the higher the corresponding frequency position, and the stronger the impedance effect of the four-quadrant adjustable reactor on the corresponding frequency position under inductive equivalent reactance support. When the support direction indicates that the characteristic harmonic distribution needs to be enhanced, the direction of change of the matching equivalent reactance is the increasing direction to improve the impedance support capability of the dynamic impedance branch for the harmonic traction object. When the support direction indicates that the characteristic harmonic distribution needs to be weakened, the direction of change of the matching equivalent reactance is the decreasing direction to reduce the impedance support capability of the dynamic impedance branch for the harmonic traction object. When the support direction and support strength do not reflect the reactance adjustment requirements, the direction of change of the matching equivalent reactance is the maintaining direction.

[0090] The impedance connection method and characteristic harmonic traction direction are arranged into a control chain according to the connection position to form traction control data.

[0091] Specifically, the impedance connection method and characteristic harmonic traction direction are matched item by item according to the connection location. The impedance connection order, equivalent reactance change direction, harmonic traction object, and characteristic harmonic traction direction under the same connection location are written into the same control chain record. The control chain records are arranged according to the sequence number of the connection location in the acquisition time sequence, so that the control chain record with the smaller sequence number corresponds to the dynamic impedance branch connected first, and the control chain record with the larger sequence number corresponds to the dynamic impedance branch connected later. The control chain records corresponding to adjacent sequence numbers are connected according to the impedance connection order, and it is verified whether the equivalent reactance change direction and characteristic harmonic traction direction in the same control chain record correspond to the same harmonic traction object. The control chain records that have been connected and verified are continuously arranged according to the connection location, and the traction control data is output.

[0092] It should be noted that by establishing a correlation and influence relationship between load impedance changes and characteristic harmonic distribution, the impedance connection of dynamic impedance branches is no longer adjusted solely based on voltage or current fluctuations. Instead, it can simultaneously determine the impedance connection sequence, equivalent reactance change direction, and characteristic harmonic traction direction based on the direction of load impedance change, the strength of characteristic harmonic distribution, and the target of harmonic traction. This allows the flexible voltage regulator to synchronously complete impedance matching and harmonic traction control during power supply and distribution voltage regulation, improving the adaptability of the voltage regulation process to load connection changes, the targeted suppression of characteristic harmonic disturbances, and the accuracy of continuous traction control data.

[0093] The excitation execution module, according to the traction control data, performs connection control relationship arrangement and excitation adjustment relationship arrangement for the high-speed insulated gate bipolar transistor and the four-quadrant adjustable reactor in the dynamic impedance branch, forming excitation linkage data. Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to switch the connection path of the dynamic impedance branch, and the four-quadrant adjustable reactor is driven to adjust the equivalent reactance in the connection path, generating impedance execution data.

[0094] Figure 5 The diagram illustrates the changes in the amplitude ratio of the fifth harmonic, the amplitude ratio of the seventh harmonic, and the total harmonic distortion rate over the acquisition time under the scheme of this invention. The red dashed box and the local magnified area correspond to the characteristic peak position after the load impedance changes. The three curves fall back synchronously after the peak, indicating that after the characteristic harmonic traction direction is converted into excitation adjustment relationship data, it can drive the equivalent reactance adjustment and suppress the characteristic harmonic, reflecting the improved consistency of characteristic harmonic traction.

[0095] The impedance connection methods in the traction control data are broken down into impedance increase connection, impedance decrease connection, and impedance hold connection, and the connection positions corresponding to each impedance connection method are marked to form access requirement data.

[0096] Specifically, the impedance connection methods in the traction control data are broken down item by item according to the direction of change of equivalent reactance. When the direction of change of equivalent reactance is increasing, it is classified as impedance increase connection; when the direction of change of equivalent reactance is decreasing, it is classified as impedance decrease connection; and when the direction of change of equivalent reactance is maintaining, it is classified as impedance maintenance connection. The impedance increase connection, impedance decrease connection, and impedance maintenance connection are respectively bound to their corresponding connection positions, and the corresponding impedance access order is retained, so that each connection position corresponds to a clear impedance connection method and access order. The completed and calibrated impedance increase connection, impedance decrease connection, and impedance maintenance connection are organized in the order of acquisition time to form access requirement data.

[0097] Based on the access demand data, the system configures access, bypass, and hold actions for the high-speed insulated gate bipolar transistors in the dynamic impedance branch, arranges them in sequence, and outputs access control relationship data.

[0098] Specifically, the action types of high-speed insulated gate bipolar transistors are configured according to the impedance increase acceptance, impedance decrease acceptance, and impedance hold acceptance in the access requirement data. The impedance increase acceptance corresponds to the access action, allowing the dynamic impedance branch to access the compensation voltage output path on the inverter output side; the impedance decrease acceptance corresponds to the bypass action, allowing the dynamic impedance branch to bypass from the compensation voltage output path on the inverter output side; the impedance hold acceptance corresponds to the hold action, keeping the dynamic impedance branch in its current access state. The access action, bypass action, and hold action are written to the corresponding acceptance positions, and the actions are arranged according to the impedance access order, outputting the access control relationship data.

[0099] The receiving position in the access control relationship data is connected with the characteristic harmonic traction direction in the traction control data, and the excitation enhancement action, excitation weakening action, and excitation holding action of the four-quadrant adjustable reactor are configured according to the characteristic harmonic traction direction to form excitation regulation relationship data.

[0100] Specifically, based on the receiving positions corresponding to the access actions, bypass actions, and holding actions in the access control relationship data, the characteristic harmonic traction direction and harmonic traction object under the same receiving position are found in the traction control data. Access actions, bypass actions, holding actions, characteristic harmonic traction directions, and harmonic traction objects with the same receiving position are written into the same excitation configuration record. When the characteristic harmonic traction direction in the same excitation configuration record corresponds to enhancing the traction effect of the dynamic impedance branch on the harmonic traction object, an excitation enhancement action is configured for the four-quadrant adjustable reactor. When the characteristic harmonic traction direction in the same excitation configuration record corresponds to reducing the traction effect of the dynamic impedance branch on the harmonic traction object, an excitation weakening action is configured for the four-quadrant adjustable reactor. When the characteristic harmonic traction direction in the same excitation configuration record corresponds to maintaining the traction effect of the dynamic impedance branch on the harmonic traction object, an excitation holding action is configured for the four-quadrant adjustable reactor. The excitation enhancement action, excitation weakening action, and excitation holding action are arranged according to the receiving position and the characteristic harmonic traction direction to form excitation regulation relationship data.

[0101] The access control relationship data and excitation regulation relationship data are linked and organized according to the same connection position, and the excitation linkage data is output.

[0102] Specifically, a linkage correspondence is established between the access control relationship data and the excitation adjustment relationship data according to the same receiving position. When the receiving position corresponds to the access action, the access action and the excitation enhancement action or excitation reduction action are written into the same linkage control record, so that the high-speed insulated gate bipolar transistor first forms the access path of the dynamic impedance branch, and the four-quadrant adjustable reactor then adjusts the equivalent reactance along the access path. When the receiving position corresponds to the bypass action, the bypass action and the excitation reduction action are written into the same linkage control record, so that when the dynamic impedance branch bypasses from the compensation voltage output path of the inverter output side, the equivalent reactance is simultaneously reduced. When the receiving position corresponds to the holding action, the holding action and the excitation holding action are written into the same linkage control record, so that the access state of the dynamic impedance branch and the equivalent reactance adjustment state are consistent. Each linkage control record is arranged according to the impedance access order, and each linkage control record retains the receiving position, access action, bypass action, holding action, excitation enhancement action, excitation reduction action, excitation holding action, characteristic harmonic traction direction and harmonic traction object, and outputs excitation linkage data.

[0103] Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to perform access, bypass and hold actions, and the access path of the dynamic impedance branch is recorded to form path switching data.

[0104] Specifically, based on the linkage control records in the excitation linkage data, the high-speed insulated-gate bipolar transistor (IGBT) is issued access, bypass, and hold actions according to the impedance access sequence. The access action triggers the IGBT to connect the dynamic impedance branch with the inverter output side compensation voltage output path, allowing the dynamic impedance branch to enter the access path. The bypass action triggers the IGBT to switch the dynamic impedance branch from the access path to the bypass path, allowing the dynamic impedance branch to bypass the inverter output side compensation voltage output path. The hold action triggers the IGBT to maintain the current connection state, allowing the dynamic impedance branch to continue the current access state. The access path, bypass path, and hold state formed by the IGBT at each connection position are recorded in the order of acquisition time to form path switching data.

[0105] Furthermore, the access, bypass, and hold actions are converted by the voltage regulator controller into a combination of gate drive signals for high-speed insulated-gate bipolar transistors (IGBTs). The access action corresponds to the IGBT on the series side of the dynamic impedance branch being turned on, and the IGBT on the bypass side being turned off, allowing the dynamic impedance branch to enter the compensation voltage output path on the inverter output side. The bypass action corresponds to the IGBT on the bypass side being turned on, and the IGBT on the series side of the dynamic impedance branch being turned off, allowing the dynamic impedance branch to switch to the bypass path. The hold action corresponds to maintaining the gate drive signal combination in the connected position, allowing the dynamic impedance branch to continue its current access state.

[0106] In the access path of path switching data, the four-quadrant adjustable reactor is driven to perform excitation regulation according to the excitation regulation relationship in the excitation linkage data, and the equivalent reactance regulation state in the access path is recorded as reactance regulation data.

[0107] Specifically, the receiving position is located according to the access path recorded in the path switching data, and the excitation adjustment relationship under the same receiving position is extracted from the excitation linkage data. When the excitation adjustment relationship is an excitation enhancement action, the four-quadrant adjustable reactor is driven to increase the equivalent reactance in the access path, so that the dynamic impedance branch forms enhanced reception for the harmonic traction object. When the excitation adjustment relationship is an excitation depletion action, the four-quadrant adjustable reactor is driven to decrease the equivalent reactance in the access path, so that the dynamic impedance branch forms weakened reception for the harmonic traction object. When the excitation adjustment relationship is an excitation holding action, the four-quadrant adjustable reactor is driven to maintain the equivalent reactance in the access path, so that the dynamic impedance branch maintains the current reception state. The receiving position, access path, excitation adjustment relationship, and equivalent reactance adjustment state are written into the same adjustment record in the order of acquisition time as reactance adjustment data.

[0108] Furthermore, the excitation regulation relationship is executed through the excitation current direction and amplitude of the four-quadrant adjustable reactor; the excitation enhancement action corresponds to increasing the excitation current amplitude according to the characteristic harmonic traction direction, thereby enhancing the equivalent reactance carrying capacity in the access path; the excitation weakening action corresponds to decreasing the excitation current amplitude, thereby weakening the equivalent reactance carrying capacity in the access path; the excitation holding action corresponds to maintaining the current excitation current direction and amplitude; after the regulation is completed, the equivalent reactance is increased, decreased, or held according to the voltage carrying state and current flow state of the four-quadrant adjustable reactor in the access path, and the determination result is recorded as the equivalent reactance regulation state.

[0109] The path switching data and reactance adjustment data are combined to generate impedance execution data.

[0110] Specifically, the path switching data and reactance adjustment data are matched according to the receiving position. The access path, bypass path, and holding state in the path switching data are written into the same execution record along with the excitation adjustment relationship and equivalent reactance adjustment state in the reactance adjustment data. When the receiving position corresponds to the access path, the execution record includes the access path, excitation enhancement action or excitation weakening action, and the corresponding equivalent reactance adjustment state. When the receiving position corresponds to the bypass path, the execution record includes the bypass path, excitation weakening action, and the corresponding equivalent reactance adjustment state. When the receiving position corresponds to the holding state, the execution record includes the holding state, excitation holding action, and the corresponding equivalent reactance adjustment state. The execution records are arranged in the order of acquisition time to generate impedance execution data.

[0111] It should be noted that this solution transforms the impedance connection method in the traction control data into the access, bypass, and holding actions of a high-speed insulated-gate bipolar transistor, and transforms the characteristic harmonic traction direction into the excitation enhancement, de-excitation, and excitation holding actions of a four-quadrant adjustable reactor. This enables the coordinated execution of dynamic impedance branch access path switching and equivalent reactance adjustment in the access path. The access control relationship data is responsible for determining whether the dynamic impedance branch enters the inverter output side compensation voltage output path, and the excitation adjustment relationship data is responsible for determining the equivalent reactance adjustment state in the access path. The excitation linkage data binds path switching and excitation adjustment to the same connection position, so that impedance increase connection, impedance decrease connection, and impedance holding connection can correspond to executable device actions. This improves the dynamic impedance matching capability, harmonic traction targeting, and voltage regulation execution continuity of the flexible voltage regulator under the combined effects of load access changes and characteristic harmonic disturbances.

[0112] The status verification module verifies and collects the results of the inverter output status of the flexible voltage regulator based on the impedance execution data, and outputs the voltage regulation result data.

[0113] Align the access path and equivalent reactance adjustment status in the impedance execution data with the inverter output status of the flexible voltage regulator according to the acquisition position, and compare the changes in voltage and current data corresponding to the access path and the changes in characteristic harmonic distribution corresponding to the equivalent reactance adjustment status, and output status comparison data.

[0114] Specifically, based on the connection position in the impedance execution data, voltage data, current data, and characteristic harmonic distributions at the same acquisition position are matched in the inverter output state of the flexible voltage regulator; using the connection position as a boundary, voltage data, current data, and characteristic harmonic distributions before and after the connection position are extracted; when the impedance corresponding to the access path increases, it is checked whether the current data amplitude decreases and the voltage data fluctuation decreases after the connection position; when the impedance corresponding to the access path decreases, it is checked whether the current data amplitude recovers and the voltage data is continuously connected after the connection position; when the impedance corresponding to the access path remains connected... Verify whether the changes in voltage and current data before and after the connection point are consistent; when the equivalent reactance adjustment state is that the equivalent reactance increases, verify whether the amplitude ratio distribution of the characteristic harmonic distribution decreases after the connection point; when the equivalent reactance adjustment state is that the equivalent reactance decreases, verify whether the amplitude ratio distribution of the characteristic harmonic distribution changes in the direction of weakening the connection after the connection point; when the equivalent reactance adjustment state is that the equivalent reactance remains constant, verify whether the characteristic harmonic distribution is continuous before and after the connection point; organize the verification results with the connection point, connection path, and equivalent reactance adjustment state, and output the state comparison data.

[0115] Figure 6 The average values ​​of output voltage fluctuation rate, impedance matching error, total harmonic distortion rate, and equivalent reactance following error within the disturbance window were compared between the compensation voltage regulation scheme based on output voltage deviation, the fixed impedance branch scheme, and the scheme of the present invention. The scheme of the present invention has lower overall indicators, indicating that the access control relationship data and the excitation regulation relationship data can be executed in conjunction at the same connection position, which improves the impedance connection stability, harmonic synergistic suppression effect, and the verifiability of voltage regulation results.

[0116] The state comparison data is marked with consistency and deviation, and the access path, equivalent reactance adjustment state, inverter output state change, consistency mark and deviation mark are written into the same voltage regulation record to form voltage regulation result data.

[0117] Specifically, the connection path, equivalent reactance adjustment status, voltage data changes before and after the connection location, current data changes, and characteristic harmonic distribution changes are extracted from the status comparison data item by item according to the connection location. The voltage data changes, current data changes, and characteristic harmonic distribution changes are combined and recorded as inverter output status changes. When the verification result corresponding to the connection path meets the requirements of impedance increase connection, impedance decrease connection, or impedance maintenance connection, and the verification result corresponding to the equivalent reactance adjustment status meets the requirements of equivalent reactance increase, equivalent reactance decrease, or equivalent reactance maintenance, a consistency mark is written at the corresponding connection location. When the verification result corresponding to the connection path does not meet the requirements of impedance increase connection, impedance decrease connection, or impedance maintenance connection, or the verification result corresponding to the equivalent reactance adjustment status does not meet the requirements of equivalent reactance increase, equivalent reactance decrease, or equivalent reactance maintenance, a deviation mark is written at the corresponding connection location. The connection location, connection path, equivalent reactance adjustment status, inverter output status changes, consistency mark, and deviation mark are written into the same voltage regulation record in the order of acquisition time to form voltage regulation result data.

[0118] In summary, this invention achieves coordinated execution of dynamic impedance matching and characteristic harmonic traction through the arrangement of access control relationships and excitation regulation relationships. By splitting the impedance acceptance mode in the traction control data into impedance increase acceptance, impedance decrease acceptance, and impedance hold acceptance, and forming access control relationship data according to the acceptance position, and simultaneously transforming the characteristic harmonic traction direction into excitation enhancement action, excitation weakening action, and excitation hold action, excitation regulation relationship data is formed. This allows the access path switching of the high-speed insulated gate bipolar transistor and the equivalent reactance adjustment of the four-quadrant adjustable reactor to be executed in conjunction at the same acceptance position, thereby improving the impedance acceptance stability, characteristic harmonic traction consistency, and verifiability of the voltage regulation result data in the inverter output state of the flexible voltage regulator.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression, characterized in that: include, The inverter marking module acquires the inverter output operation data of the flexible voltage regulator, marks the inverter status position, and outputs the inverter terminal marking data. The impedance harmonic identification module identifies load impedance changes and characteristic harmonic distributions from the inverter terminal marking data, and aggregates the load impedance changes and characteristic harmonic distributions according to the positional correspondence in the inverter terminal marking data to generate impedance harmonic data. The traction matching module performs traction correlation analysis on the load impedance change and characteristic harmonic distribution in the impedance harmonic data, outputs the bearing influence relationship, and matches the impedance bearing mode and characteristic harmonic traction direction of the dynamic impedance branch in the flexible voltage regulator according to the bearing influence relationship to form traction control data. The excitation execution module, according to the traction control data, performs the connection control relationship arrangement and excitation adjustment relationship arrangement for the high-speed insulated gate bipolar transistor and the four-quadrant adjustable reactor in the dynamic impedance branch, forming excitation linkage data. Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to switch the connection path of the dynamic impedance branch, and the four-quadrant adjustable reactor is driven to adjust the equivalent reactance in the connection path, generating impedance execution data. The status verification module verifies and collects the results of the inverter output status of the flexible voltage regulator based on the impedance execution data, and outputs the voltage regulation result data.

2. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The inverter output operating data includes voltage data, current data, waveform data, and load connection change data on the inverter output side of the flexible voltage regulator.

3. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for specifying the output inverter terminal marking data are as follows: The voltage, current and waveform data in the inverter output operation data are divided into state segments according to the acquisition time sequence to determine the voltage connection segment, current change segment and waveform change segment. Mark the acquisition location of the voltage receiving segment as the voltage receiving location, the acquisition location of the current change segment as the current change location, and the acquisition location of the waveform change segment as the waveform change location. Write the voltage connection position, current change position, and waveform change position into the inverter output operation data, and output inverter terminal marking data.

4. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for identifying load impedance changes and characteristic harmonic distributions are as follows: Based on the position correspondence in the inverter terminal marking data, the voltage data, current data, and load connection change data are collected and organized to form voltage and current connection data. Perform load connection offset analysis on voltage and current connection data before and after load connection to identify the amplitude and phase offset between voltage and current data and determine the load impedance change; Based on load impedance changes, waveform data corresponding to the acquisition location is extracted from the inverter terminal marker data, and the harmonic components in the waveform data are identified and their distribution is calibrated. Determine the characteristic harmonic distribution.

5. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for generating impedance harmonic data are as follows: According to the position correspondence in the inverter terminal marking data, the load impedance change and characteristic harmonic distribution are linked to the matching acquisition position to form impedance harmonic position data; The load impedance changes and characteristic harmonic distributions in the impedance harmonic location data are correlated and organized to generate impedance harmonic data.

6. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for establishing the output inheritance relationship are as follows: Load impedance changes and characteristic harmonic distributions are read from impedance harmonic data, and an impedance harmonic control group is established between load impedance changes and characteristic harmonic distributions at the same acquisition location. The direction of load impedance change and the strength of characteristic harmonic distribution in the control group are compared in the same position to determine the state of characteristic harmonic distribution at the load impedance change point, thus forming the data on the influence of the resistance harmonics. The enhanced, weakened, and offset states in the harmonic influence data are calibrated and the influence relationship is output.

7. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for generating traction control data are as follows: The relationship analysis is performed on the enhanced state, weakened state and offset state in the inheritance influence relationship to determine the inheritance direction, inheritance strength and inheritance position corresponding to the inheritance influence relationship, and to form inheritance characteristic data; Based on the characteristic data of the acceptance, the impedance connection order of the dynamic impedance branch in the flexible voltage regulator, the direction of the change of equivalent reactance and the harmonic traction object, the impedance acceptance method and the characteristic harmonic traction direction are determined. The impedance connection method and characteristic harmonic traction direction are arranged into a control chain according to the connection position to form traction control data.

8. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for generating excitation linkage data are as follows: The impedance connection methods in the traction control data are broken down into impedance increase connection, impedance decrease connection and impedance hold connection, and the connection position corresponding to each impedance connection method is marked to form access requirement data. Based on the access demand data, the system configures access, bypass, and hold actions for the high-speed insulated gate bipolar transistors in the dynamic impedance branch, arranges them in sequence, and outputs access control relationship data. The receiving position in the access control relationship data is connected with the characteristic harmonic traction direction in the traction control data, and the excitation enhancement action, excitation weakening action, and excitation holding action of the four-quadrant adjustable reactor are configured according to the characteristic harmonic traction direction to form excitation regulation relationship data. The access control relationship data and excitation regulation relationship data are linked and organized according to the same connection position, and the excitation linkage data is output.

9. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for generating impedance execution data are as follows: Based on the excitation linkage data, the high-speed insulated gate bipolar transistor is driven to perform access, bypass and hold actions, and the access path of the dynamic impedance branch is recorded to form path switching data; In the access path of path switching data, the four-quadrant adjustable reactor is driven to perform excitation adjustment according to the excitation adjustment relationship in the excitation linkage data, and the equivalent reactance adjustment state in the access path is recorded as reactance adjustment data. The path switching data and reactance adjustment data are combined to generate impedance execution data.

10. The intelligent voltage regulation system with embedded dynamic impedance matching and harmonic synergistic suppression as described in claim 1, characterized in that: The specific steps for obtaining the output voltage regulation result data are as follows: Align the access path and equivalent reactance adjustment state in the impedance execution data with the inverter output state of the flexible voltage regulator according to the acquisition position, and compare the changes in voltage data and current data corresponding to the access path and the changes in characteristic harmonic distribution corresponding to the equivalent reactance adjustment state, and output state comparison data. The state comparison data is marked with consistency and deviation, and the access path, equivalent reactance adjustment state, inverter output state change, consistency mark and deviation mark are written into the same voltage regulation record to form voltage regulation result data.

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