Mode switching method and system for dry-type phase-shifting transformer adapted to panamanian power supply

Abstract

This invention relates to the field of transformer mode switching technology, and particularly to a mode switching method and system for a dry-type phase-shifting transformer adapted to the Panama power supply. The method includes: real-time acquisition of voltage and current signals from the input and output sides of the dry-type phase-shifting transformer, and calculation of the phase shift angle and output voltage amplitude as characteristic quantities; construction of a phasor relationship model and identification of the current power grid supply mode; establishment of a joint matching criterion for phase shift angle and voltage amplitude to determine the current operating mode and target mode; generation of a mode switching sequence based on mode differences; and adjustment of the operating state according to the switching sequence until the amplitude, frequency, and phase of the output voltage all meet the rated power supply parameters of the Panama power supply. This invention effectively solves the problems of existing methods not being specifically adapted to the Panama power grid and having substandard power supply parameters, achieving precise adaptation and ensuring normal equipment operation and stable power supply to the power system.

Description

Technical Field

[0001] This invention relates to the field of transformer mode switching technology, and more particularly to a mode switching method and system for a dry-type phase-shifting transformer adapted to Panama power supply. Background Technology

[0002] Dry-type phase-shifting transformers, as core equipment in power transmission systems, are widely used in various power scenarios. The accuracy and adaptability of their mode switching directly determine the stability and quality of power supply. In the Panamanian power system, due to the unique rated power supply parameters of its grid, the existing mode switching methods for dry-type phase-shifting transformers are mostly general-purpose designs, without specific adaptation and optimization for the voltage, frequency, and phase characteristics of the Panamanian power grid.

[0003] Existing switching methods lack specific consideration for the parameters of the Panama power grid, resulting in an inability to accurately match the rated power supply requirements of the Panama power grid during mode switching. This often leads to problems such as deviations in output voltage amplitude, frequency, and phase from the standard range after switching, and substandard power supply parameters, which in turn affect the normal operation of downstream power equipment and fail to meet the actual usage needs in the Panama power supply scenario. Summary of the Invention

[0004] This invention provides a mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply, the method comprising: The voltage and current signals of the input and output sides of the dry-type phase-shifting transformer are acquired in real time, and the phase shift angle and output voltage amplitude of the input and output voltages are calculated as characteristic quantities based on the voltage and current signals. Based on the aforementioned characteristic quantities, a phasor relationship model between the input voltage and the output voltage is constructed, and the power supply mode of the current power grid is identified according to the phasor relationship model. Based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, a joint matching criterion for the phase shift angle and voltage amplitude is established, and the current operating mode and target mode of the dry-type phase shift transformer are determined based on the joint matching criterion. Based on the differences between the current operating mode and the target mode, a mode switching sequence is generated; The operating state of the dry-type phase-shifting transformer is adjusted according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama Power Supply.

[0006] Furthermore, the switching sequence includes: Switching timing constraints ensure that actions are performed synchronously within a specific phase range of the grid voltage waveform. The switching path constraint is used to progressively adjust the output voltage amplitude through the tap changer and adjust the winding switching at the moment when the current waveform naturally crosses zero.

[0007] Furthermore, based on the aforementioned characteristic quantities, a phasor relationship model between the input voltage and the output voltage is constructed, and the power supply mode of the current power grid is identified according to the phasor relationship model, including: The voltage and current signals on the input and output sides are sampled and phase compensated synchronously to eliminate the phase error introduced by the sampling delay; Using the phase shift angle and output voltage amplitude among the aforementioned characteristic quantities as core parameters, a real-time phasor relationship model between the input voltage and the output voltage is constructed. By combining the real-time change rate and fluctuation range of characteristic quantities, the power supply mode of the current power grid is identified based on the phasor relationship model.

[0008] Furthermore, by combining the real-time change rate and fluctuation range of characteristic quantities, the power supply mode of the current power grid is identified based on the phasor relationship model, including: Differentiate the phase shift angle and output voltage amplitude among the characteristic quantities to obtain the corresponding rate of change; The rate of change of the phase shift angle and the rate of change of the output voltage amplitude are compared with the preset fluctuation range; Based on the comparison results, the steady-state power supply mode and the transient fluctuation power supply mode of the power grid are distinguished and identified.

[0009] Furthermore, based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, a joint matching criterion for the phase shift angle and voltage amplitude is established, and the current operating mode and target mode of the dry-type phase-shifting transformer are determined based on the joint matching criterion, including: The real-time deviations of the phase shift angle and output voltage amplitude from the rated power supply parameters of the Panama power grid are calculated respectively, and the real-time deviations are filtered and denoised. Based on the identification results of the power grid power supply mode, the weights of phase shift angle deviation and output voltage amplitude deviation are dynamically allocated; Based on the deviation value after dynamic weight fusion, a joint matching criterion for phase-shift angle voltage amplitude is constructed; The filtered real-time deviation is substituted into the joint matching criterion to output the matching result, and the current operating mode and target mode are determined based on the matching result.

[0010] Furthermore, the phase-shift angle voltage amplitude joint matching criterion adopts a dynamic deviation fusion algorithm.

[0011] Furthermore, based on the differences between the current operating mode and the target mode, a mode switching sequence is generated, including: Identify the differences in parameters between the current operating mode and the target mode in terms of winding connection method, tap changer position, and phase shift angle setting, and quantify the adjustment difference of each parameter; Based on the parameter adjustment difference, determine the set of differentiated adjustment actions, and classify the priority of each adjustment action, among which the phase shift angle adjustment action has a higher priority than the tap changer position adjustment action; Combining switching time constraints and switching path constraints, and synchronizing the phase range of the grid voltage waveform and the natural zero-crossing time of the current, the timing of each priority adjustment action is arranged, and the execution node of each action is marked. Calculate the switching inrush current under each timing arrangement scheme, select the scheme with the optimal inrush current, and generate an executable mode switching sequence.

[0012] Further, the operating state of the dry-type phase-shifting transformer is adjusted according to the switching sequence until the amplitude, frequency, and phase of its output voltage all meet the rated power supply parameters of the Panama power supply, including: According to the execution nodes marked in the switching sequence, each adjustment action is executed step by step, and the real-time voltage and current signals of the output side of the dry phase-shifting transformer are collected simultaneously. Based on the acquired real-time signals, the amplitude, frequency, and phase of the output voltage are calculated in real time and dynamically compared with the rated power supply parameters of the Panama power grid. Based on the comparison results, the execution range of each adjustment action is dynamically fine-tuned to compensate for parameter offsets during the adjustment process; Continuously perform adjustment and fine-tuning actions until the amplitude, frequency and phase of the output voltage match the rated power supply parameters of the Panama power grid.

[0013] A mode switching system for a dry-type phase-shifting transformer adapted to Panama power supply, the system comprising: The feature quantity calculation module acquires the voltage and current signals on the input and output sides of the dry-type phase-shifting transformer in real time, and calculates the phase shift angle and output voltage amplitude of the input and output voltages as feature quantities based on the voltage and current signals. The power supply mode identification module constructs a phasor relationship model between the input voltage and the output voltage based on the feature quantity, and identifies the power supply mode of the current power grid according to the phasor relationship model. The operation mode determination module establishes a joint matching criterion for phase shift angle and voltage amplitude based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, and determines the current operation mode and target mode of the dry-type phase shift transformer based on the joint matching criterion. The switching sequence generation module generates a mode switching sequence based on the mode differences between the current operating mode and the target mode; The operation status adjustment module adjusts the operation status of the dry-type phase-shifting transformer according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama Power Supply.

[0014] Furthermore, the power supply mode recognition module includes: The synchronous sampling compensation unit performs synchronous sampling and phase compensation on the voltage and current signals of the input and output sides to eliminate the phase error introduced by the sampling delay. The phasor model construction unit uses the phase shift angle and output voltage amplitude among the characteristic quantities as core parameters to construct a real-time phasor relationship model between the input voltage and the output voltage. The power grid morphology determination unit identifies the current power supply morphology of the power grid based on the phasor relationship model, by combining the real-time change rate and fluctuation range of characteristic quantities.

[0015] The technical solution of this invention can achieve the following technical effects: This effectively solves the problems of existing methods not being specifically adapted to the Panama power grid and power supply parameters not meeting standards, achieving precise adaptation and ensuring normal equipment operation and stable power supply to the power system.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating the mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply. Figure 2 This is a flowchart illustrating the process of identifying the current power supply configuration of the power grid based on the phasor relationship model. Figure 3 A flowchart illustrating the process of determining the current power supply mode of the power grid by combining the real-time change rate and fluctuation range of characteristic quantities. Figure 4A flowchart illustrating the process for determining the current and target operating modes of a dry-type phase-shifting transformer; Figure 5 A flowchart illustrating the process of generating a mode switching sequence; Figure 6 This is a flowchart illustrating the process of adjusting the operating status of a dry-type phase-shifting transformer according to a switching sequence. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example 1: like Figure 1 As shown, this application provides a mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply, the method including: S1: Real-time acquisition of voltage and current signals on the input and output sides of the dry-type phase-shifting transformer, and calculation of the phase shift angle and output voltage amplitude of the input and output voltages as characteristic quantities based on the voltage and current signals; Specifically, high-precision voltage and current sensors are preferred as signal acquisition components, which are fixedly installed at the input and output terminals of the dry-type phase-shifting transformer. The sensors are selected from high-precision models with extremely small errors, and the sampling frequency is strictly matched to the rated frequency of the Panamanian power grid, set to a suitable fixed value to ensure real-time capture of subtle changes in voltage and current signals on both sides. The acquired analog signals are transmitted to a dedicated data processing unit via shielded cables to avoid signal distortion caused by external electromagnetic interference. The data processing unit filters and amplifies the received voltage signals, extracts the instantaneous phase information of the input and output voltages, calculates the phase shift angle between them using the phase difference, and simultaneously obtains the actual amplitude of the output voltage using the effective value calculation method. The phase shift angle and output voltage amplitude are used as core characteristic quantities for all subsequent processing steps. For example, if the rated frequency of the power grid in a certain area of ​​Panama is a fixed value, the sensor sampling frequency is set to an integer multiple of this rated frequency to ensure that a sufficient number of data points are collected each cycle, the calculated phase shift angle error is controlled within a very small range, and the output voltage amplitude error does not exceed a small proportion of the rated value, ensuring the accuracy of the characteristic quantities.

[0022] S2: Based on the characteristic quantities, construct a phasor relationship model between the input voltage and the output voltage, and identify the power supply mode of the current power grid according to the phasor relationship model; Specifically, a dynamic modeling approach is preferred to construct the phasor relationship model. Unlike existing fixed models, this model can dynamically adjust the model parameters according to the real-time changes of characteristic quantities. In combination with the voltage phase characteristics and fluctuation patterns of the Panama power grid, adaptation parameters are introduced to enable the model to accurately reflect the real-time correspondence between input and output voltages. After the modeling is completed, the current power supply mode of the power grid is identified by analyzing the dynamic fluctuation characteristics and parameter change trends of the phasor relationship model and combining the changes of characteristic quantities.

[0023] S3: Based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, establish a joint matching criterion for the phase shift angle and voltage amplitude, and determine the current operating mode and target mode of the dry-type phase shift transformer based on the joint matching criterion; Specifically, firstly, the preset rated power supply parameters of the Panama power grid are retrieved, and the real-time deviations of the phase shift angle and output voltage amplitude from the corresponding rated parameters are calculated. The calculated real-time deviations are then filtered and denoised to eliminate abnormal deviation values ​​caused by instantaneous pulse interference, ensuring the authenticity of the deviation data. Subsequently, based on the identified power grid power supply mode, the weights of the phase shift angle deviation and output voltage amplitude deviation are dynamically allocated. Then, based on the deviation values ​​after dynamic weight fusion, a joint matching criterion for phase shift angle and voltage amplitude is constructed. Finally, the filtered real-time deviation is substituted into this criterion, and the matching result is output through the matching logic of the criterion. Based on the matching result, the current operating mode of the dry-type phase-shifting transformer is determined. At the same time, combined with the power supply requirements of the Panama power grid, the target mode to be switched to is determined.

[0024] S4: Generate a mode switching sequence based on the mode differences between the current operating mode and the target mode; Specifically, the process begins by comprehensively identifying the differences between the current operating mode and the target mode in three core parameters: winding connection method, tap changer position, and phase shift angle setting. Quantitative calculations are then performed to obtain the adjustment difference for each parameter, clarifying the specific adjustment range required for each parameter. Subsequently, based on the magnitude and impact of these adjustment differences, a set of differentiated adjustment actions is determined, prioritizing each action. Phase shift angle adjustment has a higher priority than tap changer position adjustment to avoid impacting phase stability. Next, combining switching time and path constraints, and synchronizing the specific phase interval of the grid voltage waveform with the natural zero-crossing time of the current, the priority adjustment actions are sequentially arranged, precisely calibrating the execution node and duration of each action. Finally, the switching inrush current under each timing arrangement is calculated, and the scheme with the smallest inrush current and least impact on the grid is selected to generate a directly executable mode switching sequence. For example, if the phase shift angle difference between the current mode and the target mode is large, phase shift angle adjustment is prioritized and executed within a specific phase interval of the grid voltage waveform. Tap changer position adjustment is then scheduled after phase shift angle adjustment is completed to ensure a smooth switching process.

[0025] S5: Adjust the operating status of the dry-type phase-shifting transformer according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama power supply.

[0026] Specifically, firstly, the adjustment command to be executed is determined according to the switching sequence, and a control signal is sent to the corresponding actuator to enable the dry-type phase-shifting transformer to complete one state adjustment. After this adjustment is completed, the voltage amplitude, frequency, and phase information of the transformer output side are acquired again by the state monitoring unit and judged. If the detection results still do not meet the rated power supply parameters of the Panama power supply, the next adjustment action is executed according to the switching sequence until all electrical parameters meet the set power supply requirements. Furthermore, in a preferred embodiment, in order to ensure the stability and safety of the adjustment process, a state confirmation process is set after each state switch. By monitoring the output voltage change trend and the equipment operating status, it is confirmed that the dry-type phase-shifting transformer has been stably operating in the new working state before the subsequent adjustment steps are executed, thereby avoiding electrical shocks or operational instability caused by continuous rapid switching. For example, when a certain deviation is detected between the output voltage amplitude of the dry-type phase-shifting transformer and the rated voltage of the Panama power supply, the control unit can adjust the tap state of the transformer by executing the voltage regulation command in the sequence, so that the output voltage amplitude gradually approaches the rated voltage; when a difference is detected between the output voltage phase and the target phase, the phase-shifting operation state is adjusted according to the switching sequence to change the output voltage phase; after the above adjustment is completed, by continuously monitoring the output voltage parameters, when the output voltage amplitude, frequency and phase are all within the rated power supply range of the Panama power supply, it is determined that the dry-type phase-shifting transformer has completed the mode switching and is operating stably.

[0027] As a preferred embodiment of the above, the switching sequence includes: Switching timing constraints ensure that actions are performed synchronously within a specific phase range of the grid voltage waveform. The switching path constraint is used to progressively adjust the output voltage amplitude through the tap changer and adjust the winding switching at the moment when the current waveform naturally crosses zero.

[0028] Specifically, to ensure the operational stability and electrical safety of dry-type phase-shifting transformers during mode switching, switching timing constraints and switching path constraints are added to the switching actions when generating and executing the switching sequence, ensuring that the entire regulation process is completed step-by-step according to predetermined conditions. The switching timing constraint limits the time and location of mode switching actions, synchronizing the relevant regulation operations with a specific phase interval of the grid voltage waveform. During implementation, the voltage signals on the input or output side of the dry-type phase-shifting transformer are acquired in real time, and the current phase position is determined based on voltage waveform changes. The corresponding switching operation is only executed when the voltage waveform enters a pre-set allowable operating range, thus avoiding actions during periods of drastic voltage changes or high instantaneous stress, thereby reducing switching impact and improving regulation smoothness. For example, the phase interval near the zero-crossing point of the voltage waveform can be used as the allowable time window for executing the switching action. When the voltage is detected to enter this time window, the corresponding switching command is triggered, coordinating the mode switching process with the rhythm of grid voltage changes. The switching path constraint limits the sequence and execution method of each regulation action, ensuring a gradual transition in the output voltage amplitude and phase. The output voltage amplitude is adjusted step-by-step via tap changers to avoid voltage spikes caused by sudden, large-scale adjustments. When a change in winding connection is required, the winding switching action is performed at the moment the current waveform naturally crosses zero to minimize the impact of current surges. Taking a preferred application as an example, when it is determined that the current operating mode needs to be switched to the target operating mode, the tap changer position is first adjusted step-by-step along a predetermined path to gradually bring the output voltage amplitude closer to the target voltage. Then, the winding switching is performed after the current waveform reaches its natural zero-crossing moment to complete the phase relationship adjustment. Through these methods, the dry-type phase-shifting transformer can maintain a relatively stable electrical transition state during mode switching, thereby reducing voltage fluctuations, current surges, and device switching stress, and improving operational reliability and power supply quality.

[0029] As a preferred embodiment of the above, such as Figure 2 As shown, step S2 involves constructing a phasor relationship model between the input voltage and the output voltage based on the characteristic quantities, and identifying the current power supply mode of the power grid according to the phasor relationship model, including: S21: Synchronously sample and compensate the voltage and current signals on the input and output sides to eliminate the phase error introduced by the sampling delay; S22: Using the phase shift angle and output voltage amplitude among the characteristic quantities as core parameters, a real-time phasor relationship model between the input voltage and the output voltage is constructed. S23: Combining the real-time change rate and fluctuation range of characteristic quantities, identify the current power supply mode of the power grid based on the phasor relationship model.

[0030] Specifically, the voltage and current signals on the input and output sides are first sampled synchronously to ensure that the data collected by each channel are under a unified time reference, avoiding the impact of inconsistent sampling timing on the accuracy of subsequent phase analysis. Considering the potential phase deviation caused by sensor response speed, sampling link transmission delay, and signal conditioning during the actual sampling process, phase compensation processing is performed on each signal after sampling. By comparing the time difference, waveform corresponding position, and phase shift between different sampling channels, the input and output signals are corrected to reduce the phase error introduced by sampling delay, making the subsequently established phasor relationship closer to the actual operating state. After completing synchronous sampling and phase compensation, the phase shift angle and output voltage amplitude in the characteristic quantities are used as key characterization parameters. Combined with the phase position and amplitude change of the input voltage and the phase shift of the corresponding voltage on the output side, a real-time phasor relationship model between the input and output voltages is constructed. This model is not limited to a static correspondence but can reflect the phase and voltage transmission characteristics between the input and output of the transformer under different operating states, so that the current operating state can be intuitively reflected in the form of phasor changes. For example, when the input voltage is relatively stable and the output voltage amplitude and phase shift remain within a small fluctuation range, it can be considered that a relatively stable phasor mapping relationship exists between the input and output. However, when the output voltage amplitude fluctuates continuously and the phase shift changes frequently, the corresponding trajectory in the phasor relationship model will also show a significant shift, reflecting a change in the current power supply state. When identifying the power supply mode, not only is the phasor correspondence result at a specific moment examined, but also a comprehensive judgment is made based on the real-time change rate and fluctuation range of characteristic quantities. That is, attention is paid not only to the current level of the phase shift angle and output voltage amplitude, but also to whether their changes are smooth over continuous time, whether there are rapid jumps, and whether they continuously deviate from the normal range. In this way, the current power grid power supply mode can be classified into different types, such as stable power supply mode, fluctuating power supply mode, or power supply mode with abnormal disturbances.

[0031] As a preferred embodiment of the above, such as Figure 3 As shown, step S23, combining the real-time change rate and fluctuation range of characteristic quantities, identifies the current power supply mode of the power grid based on the phasor relationship model, including: S231: Differentiate the phase shift angle and output voltage amplitude in the characteristic quantities to obtain the corresponding rate of change; S232: Compare the rate of change of phase angle and the rate of change of output voltage amplitude with the preset fluctuation range; S233: Based on the comparison results, distinguish and identify the steady-state power supply mode and the transient fluctuation power supply mode of the power grid.

[0032] Specifically, the phase shift angle and output voltage amplitude, two key characteristic quantities, are first continuously calculated to reflect their changes over time. By analyzing the changes in these characteristic quantities at consecutive sampling times, the trend of the phase shift angle and the magnitude of the output voltage amplitude within adjacent time periods are obtained, thus reflecting the rate of change of these characteristic quantities over time. In other words, by comparing the changes in the phase shift angle and output voltage amplitude at consecutive sampling times, the corresponding rate of change can be obtained, thereby characterizing the dynamic changes in the power grid's operating state. After obtaining the rates of change of the phase shift angle and output voltage amplitude, both are compared with pre-defined fluctuation ranges to determine whether the current power grid operation is within a normal and stable range. The pre-defined fluctuation range can be set based on historical operating data, power grid operating experience, or the allowable range of equipment design, ensuring that it covers the natural fluctuation range that may occur in the power grid under normal and stable power supply conditions. When both the rate of change of the phase shift angle and the rate of change of the output voltage amplitude are within the fluctuation range, it indicates that the phasor relationship between the input voltage and the output voltage remains relatively stable. At this time, it can be determined that the power grid is in a steady-state power supply mode. When either of the rates of change exceeds the preset fluctuation range, it indicates that there is a significant disturbance in the power grid operation state, and the correspondence in the phasor relationship model will also show a large shift. Based on this, it can be determined that the power grid is in a transient fluctuation power supply mode.

[0033] As a preferred embodiment of the above, such as Figure 4 As shown, step S3 involves establishing a joint matching criterion for phase shift angle and voltage amplitude based on the deviation between the phase shift angle and output voltage amplitude and the rated power supply parameters of the Panama power grid. Based on this joint matching criterion, the current operating mode and target mode of the dry-type phase-shifting transformer are determined, including: S31: Calculate the real-time deviations of the phase shift angle, output voltage amplitude, and rated power supply parameters of the Panama power grid, and perform filtering and noise reduction on the real-time deviations. S32: Based on the identification results of the power grid power supply mode, dynamically allocate the weights of phase shift angle deviation and output voltage amplitude deviation; S33: Construct a joint matching criterion for phase-shift angle voltage amplitude based on the deviation value after dynamic weight fusion; S34: Substitute the filtered real-time deviation into the joint matching criterion, output the matching result, and determine the current operating mode and target mode based on the matching result.

[0034] Specifically, the phase shift angle and output voltage amplitude under the current operating conditions are first acquired and compared with the rated power supply parameters of the Panama power grid to obtain the corresponding real-time deviation values. Considering that the power grid signal may be affected by noise interference, measurement fluctuations, or instantaneous disturbances in the actual operating environment, the deviation data is filtered and denoised after obtaining the real-time deviation to make the deviation changes smoother and more stable, thereby improving the reliability of subsequent matching judgments. For example, abrupt data points can be removed by smoothing between continuously sampled data, so that the phase shift angle deviation and output voltage amplitude deviation can more realistically reflect the current operating state. After obtaining relatively stable deviation data, different levels of importance are assigned to the phase shift angle deviation and output voltage amplitude deviation based on the power grid power supply pattern identified in the previous stage. When the power grid is in a stable power supply state, the phase shift angle deviation and the output voltage amplitude deviation can have a relatively balanced impact in the judgment process. When the power grid is in a fluctuating power supply state, the influence of one of the deviations can be appropriately increased according to operational needs, making the mode judgment more consistent with the current power grid operation characteristics. After completing the allocation of the importance of deviations, the phase shift angle deviation and the output voltage amplitude deviation are fused to form a joint matching basis for pattern recognition, so that the two types of deviations can be comprehensively evaluated under a unified judgment standard. Through this joint matching basis, the degree of matching between the current operating state and the rated power supply parameters of the Panama power grid can be determined, and the current operating mode of the dry-type phase-shifting transformer can be determined accordingly. When the degree of matching meets the predetermined conditions, it can be determined that the current operating mode is consistent with the target power supply requirements. When the degree of matching does not meet the requirements, the target operating mode that needs to be adjusted is determined according to the deviation direction and deviation magnitude.

[0035] As a preferred embodiment of the above, the phase shift angle voltage amplitude joint matching criterion adopts a dynamic deviation fusion algorithm.

[0036] Specifically, the dynamic deviation fusion algorithm is adopted because when adapting dry-type phase-shifting transformers to the rated power supply parameters of the Panama power grid, the operating mode cannot be determined based on a single parameter alone. It is necessary to consider both the phase shift angle and the output voltage amplitude, two key factors. If only the phase shift angle deviation is used for judgment, while it can reflect whether the output phase is close to the target requirement, it cannot accurately reflect whether the output voltage amplitude meets the power supply standard. If only the output voltage amplitude deviation is used for judgment, it is difficult to reflect the phase matching degree, easily leading to a one-sided judgment of the operating mode. With the dynamic deviation fusion algorithm, the phase shift angle deviation and the output voltage amplitude deviation can be incorporated into the same judgment process, enabling the pattern recognition result to simultaneously reflect the phase matching and voltage matching status. This avoids the limitations of single-indicator judgment. Furthermore, the power grid is not always in a completely stable state during actual operation. The importance of phase shift angle deviation and output voltage amplitude deviation for operating mode recognition varies under different power supply conditions. Therefore, the dynamic deviation fusion algorithm can also adaptively adjust the focus of the two types of deviations according to the current power supply status of the power grid, making the joint matching criterion more adaptable in both steady-state and fluctuating states.

[0037] As a preferred embodiment of the above, such as Figure 5 As shown, step S4 generates a mode switching sequence based on the mode differences between the current operating mode and the target mode, including: S41: Identify the parameter differences between the current operating mode and the target mode in terms of winding connection method, tap changer position, and phase shift angle setting, and quantify the adjustment difference of each parameter; S42: Based on the parameter adjustment difference, determine the set of differentiated adjustment actions, and classify the priority of each adjustment action, among which the phase angle adjustment action has a higher priority than the tap changer position adjustment action; S43: Combining switching time constraints and switching path constraints, synchronizing the phase range of the grid voltage waveform and the natural zero-crossing time of the current, the timing of each priority adjustment action is arranged, and the execution node of each action is marked. S44: Calculate the switching inrush current under each timing arrangement scheme, select the scheme with the optimal inrush current, and generate an executable mode switching sequence.

[0038] Specifically, the parameter differences between the current operating mode and the target mode are first identified and quantified. The differences are mainly compared in three aspects: winding connection method, tap changer position, and phase shift angle setting. By comparing the current operating state parameters with the target operating state parameters, the difference between each parameter that needs to be adjusted can be obtained, thus clarifying which specific adjustments need to be made during mode switching. For example, when the target operating mode requires a larger phase shift angle or different winding connection relationships, the direction and magnitude of the adjustment can be determined by comparing the corresponding parameters of the two modes. After obtaining the adjustment difference of each parameter, a differentiated set of adjustment actions is formed according to the different degrees of influence of different types of parameters on the operating state, and the execution priority is set for each adjustment action. Preferably, the phase shift angle adjustment action is set as a higher priority, while the tap changer position adjustment action is set as a relatively lower priority, so that the phase adjustment can be completed first, thereby creating more stable electrical conditions for subsequent voltage amplitude adjustment. In this way, the instability caused by multiple simultaneous adjustments can be avoided. After determining the priority of each adjustment, it is coordinated with the grid operating state. The execution timing of the corresponding actions is arranged within the appropriate phase range of the grid voltage waveform and at the moment when the current naturally crosses zero, thus arranging the timing of each adjustment action so that each action has a clear execution node. For example, phase angle adjustment can be performed in the phase range where the voltage waveform changes relatively smoothly, while actions involving changes in winding connections can be performed when the current waveform is close to the moment when it naturally crosses zero, in order to reduce the electrical impact that may be generated during the switching process. After obtaining multiple possible timing arrangement schemes, the switching inrush current that may be generated during the execution of different schemes is evaluated. By comparing the impact degree of each scheme, the one with the relatively smaller inrush current is selected as the final execution scheme, thus forming a complete mode switching sequence.

[0039] As a preferred embodiment of the above, such as Figure 6 As shown, step S5 involves adjusting the operating state of the dry-type phase-shifting transformer according to the switching sequence until the amplitude, frequency, and phase of its output voltage all meet the rated power supply parameters of the Panama power supply, including: S51: According to the execution nodes marked in the switching sequence, each adjustment action is executed step by step, and the real-time voltage and current signals of the output side of the dry phase-shifting transformer are collected simultaneously. S52: Based on the acquired real-time signal, calculate the amplitude, frequency and phase of the output voltage in real time, and dynamically compare it with the rated power supply parameters of the Panama power grid; S53: Based on the comparison results, dynamically fine-tune the execution range of each adjustment action to compensate for parameter offsets during the adjustment process; S54: Continuously perform adjustment and fine-tuning actions until the amplitude, frequency and phase of the output voltage are matched with the rated power supply parameters of the Panama power grid.

[0040] Specifically, firstly, based on the pre-marked execution nodes in the switching sequence, the corresponding adjustment actions are executed sequentially, allowing different adjustment steps to be completed step by step in a predetermined order. Simultaneously, the voltage and current signals on the output side of the dry-type phase-shifting transformer are synchronously acquired to monitor the equipment's operating status during the adjustment process in real time. Continuous sampling allows for the acquisition of changes in the output voltage and current waveforms, providing basic data for subsequent parameter calculations. After acquiring the real-time signals, the amplitude, frequency, and phase of the output voltage are calculated in real time, and the calculation results are dynamically compared with the rated power supply parameters of the Panama power grid to determine whether the current adjustment result has met the target power supply requirements. If the detection results show that the output voltage parameters still have deviations, the execution amplitude of the current adjustment action is appropriately corrected according to the direction and degree of the deviation, enabling the adjustment process to compensate for errors generated during operation. For example, in actual adjustment processes, factors such as grid fluctuations, load changes, or equipment response characteristics may cause slight deviations in the output voltage amplitude or phase. In this case, small corrections can be made to the relevant adjustment actions to gradually bring the output voltage back to the target range. For example, when the output voltage amplitude is detected to be close to the target value but still has a slight difference, the tap changer adjustment range can be finely adjusted in subsequent adjustment steps to gradually bring the output voltage closer to the rated value. When the output voltage phase deviates, the phase shift adjustment range can be appropriately changed to gradually bring the phase relationship back to the target state. By continuously detecting and fine-tuning parameters while performing adjustment actions, the entire mode switching process can form a closed-loop adjustment mechanism, allowing the dry-type phase-shifting transformer to continuously approach the target power supply state during operation. As the adjustment process continues, when the output voltage amplitude, frequency, and phase are all detected to be stably within the allowable range of the rated power supply parameters of the Panama power grid, it can be determined that the operating state has been matched, thus completing the mode switching process.

[0041] Example 2: Based on the same inventive concept as the mode switching method for the dry-type phase-shifting transformer adapted to the Panama power supply in the foregoing embodiments, the present invention also provides a mode switching system for the dry-type phase-shifting transformer adapted to the Panama power supply, comprising: The feature quantity calculation module acquires the voltage and current signals on the input and output sides of the dry-type phase-shifting transformer in real time, and calculates the phase shift angle and output voltage amplitude of the input and output voltages as feature quantities based on the voltage and current signals. The power supply mode identification module constructs a phasor relationship model between the input voltage and the output voltage based on feature quantities, and identifies the current power supply mode of the power grid according to the phasor relationship model; The operation mode determination module establishes a joint matching criterion for phase shift angle and voltage amplitude based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, and determines the current operation mode and target mode of the dry-type phase shift transformer based on the joint matching criterion. The switching sequence generation module generates a mode switching sequence based on the mode differences between the current operating mode and the target mode. The operation status adjustment module adjusts the operation status of the dry-type phase-shifting transformer according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama power supply.

[0042] The switching system described above in this invention can effectively realize the mode switching method of dry phase-shifting transformers adapted to Panama power supply, and the technical effects it can achieve are as described in the above embodiments, and will not be repeated here.

[0043] As a preferred embodiment of the above, the power supply mode recognition module includes: The synchronous sampling compensation unit performs synchronous sampling and phase compensation on the voltage and current signals of the input and output sides to eliminate the phase error introduced by the sampling delay. The phasor model building unit uses the phase shift angle and output voltage amplitude among the characteristic quantities as core parameters to build a real-time phasor relationship model between the input voltage and the output voltage. The power grid morphology determination unit identifies the current power supply morphology of the power grid based on a phasor relationship model, by combining the real-time change rate and fluctuation range of characteristic quantities.

[0044] Similarly, the above-mentioned optimization schemes for the system can also achieve the optimization effects corresponding to the methods in Embodiment 1, which will not be repeated here.

[0045] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application intends to include such modifications and modifications.

Claims

1. A mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply, characterized in that, The method includes: The voltage and current signals of the input and output sides of the dry-type phase-shifting transformer are acquired in real time, and the phase shift angle and output voltage amplitude of the input and output voltages are calculated as characteristic quantities based on the voltage and current signals. Based on the aforementioned characteristic quantities, a phasor relationship model between the input voltage and the output voltage is constructed, and the power supply mode of the current power grid is identified according to the phasor relationship model. Based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, a joint matching criterion for the phase shift angle and voltage amplitude is established, and the current operating mode and target mode of the dry-type phase shift transformer are determined based on the joint matching criterion. Based on the differences between the current operating mode and the target mode, a mode switching sequence is generated; The operating state of the dry-type phase-shifting transformer is adjusted according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama Power Supply.

2. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 1, characterized in that, The switching sequence includes: Switching timing constraints ensure that actions are performed synchronously within a specific phase range of the grid voltage waveform. The switching path constraint is used to progressively adjust the output voltage amplitude through the tap changer and adjust the winding switching at the moment when the current waveform naturally crosses zero.

3. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 1, characterized in that, Based on the aforementioned characteristic quantities, a phasor relationship model between the input voltage and the output voltage is constructed, and the power supply mode of the current power grid is identified according to the phasor relationship model, including: The voltage and current signals on the input and output sides are sampled and phase compensated synchronously to eliminate the phase error introduced by the sampling delay; Using the phase shift angle and output voltage amplitude among the aforementioned characteristic quantities as core parameters, a real-time phasor relationship model between the input voltage and the output voltage is constructed. By combining the real-time change rate and fluctuation range of characteristic quantities, the power supply mode of the current power grid is identified based on the phasor relationship model.

4. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 3, characterized in that, Combining the real-time change rate and fluctuation range of characteristic quantities, the power supply mode of the current power grid is identified based on the phasor relationship model, including: Differentiate the phase shift angle and output voltage amplitude among the characteristic quantities to obtain the corresponding rate of change; The rate of change of the phase shift angle and the rate of change of the output voltage amplitude are compared with the preset fluctuation range; Based on the comparison results, the steady-state power supply mode and the transient fluctuation power supply mode of the power grid are distinguished and identified.

5. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 1, characterized in that, Based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, a joint matching criterion for the phase shift angle and voltage amplitude is established. Based on this joint matching criterion, the current operating mode and target mode of the dry-type phase-shifting transformer are determined, including: The real-time deviations of the phase shift angle and output voltage amplitude from the rated power supply parameters of the Panama power grid are calculated respectively, and the real-time deviations are filtered and denoised. Based on the identification results of the power grid power supply mode, the weights of phase shift angle deviation and output voltage amplitude deviation are dynamically allocated; Based on the deviation value after dynamic weight fusion, a joint matching criterion for phase-shift angle voltage amplitude is constructed; The filtered real-time deviation is substituted into the joint matching criterion to output the matching result, and the current operating mode and target mode are determined based on the matching result.

6. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 5, characterized in that, The phase-shift angle voltage amplitude joint matching criterion adopts a dynamic deviation fusion algorithm.

7. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 1, characterized in that, Based on the differences between the current operating mode and the target mode, a mode switching sequence is generated, including: Identify the parameter differences between the current operating mode and the target mode in terms of winding connection method, tap changer position, and phase shift angle setting, and quantify the adjustment difference of each parameter; Based on the parameter adjustment difference, determine the set of differentiated adjustment actions, and classify the priority of each adjustment action, among which the phase shift angle adjustment action has a higher priority than the tap changer position adjustment action; Combining switching time constraints and switching path constraints, and synchronizing the phase range of the grid voltage waveform and the natural zero-crossing time of the current, the timing of each priority adjustment action is arranged, and the execution node of each action is marked. Calculate the switching inrush current under each timing arrangement scheme, select the scheme with the optimal inrush current, and generate an executable mode switching sequence.

8. The mode switching method for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 1, characterized in that, The operating state of the dry-type phase-shifting transformer is adjusted according to the switching sequence until the amplitude, frequency, and phase of its output voltage all meet the rated power supply parameters of the Panama Power Supply, including: According to the execution nodes marked in the switching sequence, each adjustment action is executed step by step, and the real-time voltage and current signals of the output side of the dry phase-shifting transformer are collected simultaneously. Based on the acquired real-time signals, the amplitude, frequency, and phase of the output voltage are calculated in real time and dynamically compared with the rated power supply parameters of the Panama power grid. Based on the comparison results, the execution range of each adjustment action is dynamically fine-tuned to compensate for parameter offsets during the adjustment process; Continuously perform adjustment and fine-tuning actions until the amplitude, frequency, and phase of the output voltage match the rated power supply parameters of the Panama power grid.

9. A mode switching system for a dry-type phase-shifting transformer adapted to Panama power supply, characterized in that, The system includes: The feature quantity calculation module acquires the voltage and current signals on the input and output sides of the dry-type phase-shifting transformer in real time, and calculates the phase shift angle and output voltage amplitude of the input and output voltages as feature quantities based on the voltage and current signals. The power supply mode identification module constructs a phasor relationship model between the input voltage and the output voltage based on the feature quantity, and identifies the power supply mode of the current power grid according to the phasor relationship model. The operation mode determination module establishes a joint matching criterion for phase shift angle and voltage amplitude based on the deviation between the phase shift angle and the output voltage amplitude and the rated power supply parameters of the Panama power grid, and determines the current operation mode and target mode of the dry-type phase shift transformer based on the joint matching criterion. The switching sequence generation module generates a mode switching sequence based on the mode differences between the current operating mode and the target mode; The operation status adjustment module adjusts the operation status of the dry-type phase-shifting transformer according to the switching sequence until the amplitude, frequency and phase of its output voltage meet the rated power supply parameters of the Panama Power Supply.

10. The mode switching system for a dry-type phase-shifting transformer adapted to Panama power supply according to claim 9, characterized in that, The power supply mode recognition module includes: The synchronous sampling compensation unit performs synchronous sampling and phase compensation on the voltage and current signals of the input and output sides to eliminate the phase error introduced by the sampling delay. The phasor model construction unit uses the phase shift angle and output voltage amplitude among the characteristic quantities as core parameters to construct a real-time phasor relationship model between the input voltage and the output voltage. The power grid morphology determination unit identifies the current power supply morphology of the power grid based on the phasor relationship model, by combining the real-time change rate and fluctuation range of characteristic quantities.

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