A method, system and device for electrical semantic consistency control under fault conditions

Abstract

This invention discloses a method, system, and device for maintaining and ensuring consistency of electrical semantics and perception under fault conditions, belonging to the field of power system fault analysis and operation control technology. This invention selects target electrical behavior templates based on fault semantics and generates equivalent electrical model parameters for reconstructing interface outputs based on fault amplitudes. By establishing a mapping relationship between fault electrical semantics and interface physical electrical amplitudes, it actively separates and coordinates the actual fault behavior of low-voltage systems, the perception of fault types on the medium-voltage side, and the actual electrical amplitudes experienced by the medium-voltage side, thereby maintaining and ensuring consistency of semantics and perception of interface electrical behavior under fault conditions.

Description

Technical Field

[0001] This invention relates to the field of power system fault analysis and operation control technology, and in particular to a method, system, and device for maintaining electrical semantics and sensing consistency under fault conditions. Background Technology

[0002] In traditional power systems where synchronous generators are the primary power source, the amplitude, phase relationship, and transient characteristics of the fault current generated during a fault naturally carry clear fault type information, enabling relay protection devices to perform fault identification and action logic based on this information. However, in distribution systems with a high proportion of power electronics, due to the limitations of inverter current capacity and protection strategies, interfaces often enter current-limiting or saturation states under fault conditions. This causes the electrical quantities detected on the medium-voltage side to deviate semantically from the actual fault behavior, and different fault types on the low-voltage side exhibit indistinguishable electrical characteristics on the medium-voltage side, leading to protection misjudgments, maloperations, or coordination failures. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a control method for maintaining electrical semantics and perception consistency under fault conditions. When a fault occurs in a power electronic distribution system, this method actively reconstructs the electrical behavior of medium and low voltage interfaces to achieve a control method for maintaining electrical semantics and perception consistency under fault conditions. This method is applicable to medium and low voltage distribution systems with a high proportion of distributed power sources.

[0004] To achieve the above objectives, the technical solution adopted in this invention is as follows: (1) defining a set of target fault electrical semantics that can be understood by the medium-voltage system; (2) constructing a mapping model between the target fault electrical semantics and the physical amplitude of the interface; (3) after fault detection, actively reconstructing the electrical behavior of the interface output, so that the medium-voltage system can perceive electrical characteristics consistent with the target fault electrical semantics under the premise of limited physical amplitude. Specifically, as follows.

[0005] This invention provides a method for maintaining electrical semantics and sensing consistency under fault conditions, comprising the following steps:

[0006] Identification Output: Based on the identified fault semantics and intensity indicators of the low-voltage side of the power distribution system, select the target electrical behavior template of the medium-voltage side corresponding to the fault semantics, generate equivalent electrical parameters based on the intensity indicators and the amplitude function of the fault amplitude, and reconstruct the output target interface electrical behavior.

[0007] Among them, fault semantics include single-phase grounding, phase-to-phase short circuit, three-phase short circuit, arc fault, and overload disturbance semantics.

[0008] Fault semantics are characterized by one or more combinations of current phase relationships, sequence component structure, and rate of change characteristics.

[0009] Intensity indicators are characterized by one or more combinations of the collected voltage and current.

[0010] The fault amplitude is specifically defined as one or more combinations of the ratio of the peak fault current to the rated value, the transient high-frequency content, the amplitude of the negative sequence component, the voltage drop depth, and the estimated fault impedance.

[0011] The target electrical behavior templates include limiting templates, slow-release templates, and filtering templates.

[0012] Each type of fault semantic is associated with one or more combinations of limiting templates, slow-presentation templates, and filtering templates.

[0013] The equivalent electrical parameters are one or more combinations of the equivalent current source parameters and the equivalent impedance parameters.

[0014] In one improved scheme, in order to achieve automated control layout, the control method also has preset operations, which specifically include the following steps: model construction: setting fault semantics for fault types on the low-voltage side of the power distribution system; setting the amplitude function of the fault amplitude for each type of fault semantic; converting each type of fault semantic and fault amplitude into equivalent electrical parameters through a mapping function; setting the target electrical behavior template for the medium-voltage side; associating each type of fault semantic with the corresponding target electrical behavior template and equivalent electrical parameters.

[0015] As mentioned above, when a fault occurs in the power distribution system, the target fault electrical semantics that can be used for fault identification in the medium-voltage system are determined; based on the target fault electrical semantics, a mapping relationship between the target fault semantics and the physical electrical amplitude of the interface is constructed; without requiring the interface to output the actual fault voltage and current amplitude, the electrical behavior of the medium and low voltage interfaces is reconstructed so that the medium-voltage system can perceive the fault electrical characteristics that are consistent with the target fault electrical semantics under the premise that the physical electrical amplitude of the interface is limited.

[0016] Based on the above control method, this invention also provides an electrical semantics maintenance and perception consistency control system under fault conditions, comprising: an identification module for identifying outputs: based on the identified and extracted fault semantics and intensity indicators of the low-voltage side of the power distribution system, selecting a target electrical behavior template for the medium-voltage side corresponding to the fault semantics, generating equivalent electrical parameters based on the intensity indicators and the amplitude function of the fault amplitude, and reconstructing the output target interface electrical behavior. In an improved embodiment, the control system further comprises: a construction module for constructing a model: setting fault semantics for fault types on the low-voltage side of the power distribution system; setting the amplitude function of the fault amplitude for each type of fault semantics; converting each type of fault semantics and fault amplitude into equivalent electrical parameters through a mapping function; setting a target electrical behavior template for the medium-voltage side; and associating each type of fault semantic with the corresponding target electrical behavior template and equivalent electrical parameters.

[0017] Based on the above control method, the present invention also provides an electrical semantics maintenance and perception consistency control device under fault conditions, including a processor and a memory, wherein the memory stores a control program, and the control program is executed by the processor to implement the above control method.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects:

[0019] This invention selects target electrical behavior templates based on fault semantics and generates equivalent electrical model parameters for reconstructing interface outputs based on fault amplitudes. By establishing a mapping relationship between fault electrical semantics and interface physical electrical amplitudes, it actively separates and coordinates low-voltage actual fault behavior, medium-voltage side's perception of fault types, and the actual electrical amplitudes borne by the medium-voltage side. It maintains semantic consistency and perception consistency control of interface electrical behavior under fault conditions. It maintains the discriminability of fault types under inverter current-limiting conditions; avoids fault semantic distortion caused by power electronics; provides stable and understandable electrical inputs for relay protection while ensuring interface safety; and is applicable to scenarios with multiple inverters in parallel and high-proportion distributed energy access. It reconstructs fault cognition methods in power-electronic distribution systems, providing a robust new fault handling mechanism for distribution systems with high-proportion new energy (wind power or solar power, etc.) access conditions. Attached Figure Description

[0020] Figure 1 This is a flowchart of the control method of the present invention. Detailed Implementation

[0021] The specific implementation of the invention will be further described below with reference to the accompanying drawings.

[0022] As mentioned above, this application includes a basic solution and an improved solution. For example, the basic solution includes an output identification step, and the improved solution includes a model construction step and an output identification step. The feature combinations of each application instance can be combined according to actual needs. The following will elaborate on this, and will use a preferred example of a combination of technical features as an example.

[0023] This invention achieves "controllable behavior" of the fault current sensed by the medium-voltage system by adjusting the equivalent current source model, equivalent impedance model, or a combination thereof at the interface. This results in: fault current limiting, controllable fault behavior, suppression of cascading trips, and blocking the sensitive response of the medium-voltage side to actual low-voltage faults. It is a method that uses parameterized adjustment of the equivalent current source and equivalent impedance to make the fault current response sensed by the medium-voltage system "controllably present." The objectives are: limiting fault current, preventing cascading trips, distinguishing responsibility for medium- and low-voltage faults, reducing maloperation of medium-voltage protection, and without affecting low-voltage fault handling. Specifically:

[0024] 1. Predefine target electrical behavior templates for each type of fault semantics (the behavior templates do not limit specific values, but describe the expected behavior that should be observed on the medium-voltage side, including limiting, filtering, buffering, etc.).

[0025] 2. The fault amplitude is used as a scaling factor for the behavioral template, through linear or nonlinear coefficients. , Adjusting the intensity of the target behavior:

[0026]

[0027]

[0028] 3. Generate the interface equivalent model parameters using the mapping function M(type, severity):

[0029]

[0030] The combination adjustment method of equivalent current source output and equivalent impedance is determined.

[0031] 4. Reconstruct the interface electrical parameters using the generated equivalent parameters to ensure the interface output meets the control objective:

[0032]

[0033] This results in the fault behavior observed at medium voltage being "controllable presentation behavior," rather than the actual fault current response at low voltage.

[0034] Since the transient current response of medium and low voltage interfaces is determined not only by physical faults but also by their equivalent current sources and equivalent impedances, the output fault current at the interface can be adjusted by modifying the model parameters to satisfy the following: ,or .

[0035] Therefore, the fault current observed on the medium-voltage side no longer strictly corresponds to the actual short-circuit capacity and fault impedance of the low-voltage side, thereby achieving: fault current limiting; medium-voltage protection operation without overstepping; controllable presentation of fault intensity; and different low-voltage faults maintaining "distinguished behavioral labels" on the medium-voltage side.

[0036] See Figure 1 The control method generates a complete path from "fault semantics + amplitude" to "equivalent electrical behavior", including:

[0037] 1. Fault Type Extraction

[0038] Used to identify low-voltage side fault types, such as single-phase grounding, three-phase short circuit, and arc fault.

[0039] 2. Amplitude / Feature Extraction (Severity)

[0040] Extract fault intensity indicators, such as current over-limit multiple, transient energy, and negative sequence component amplitude.

[0041] 3. Behavior Template Selection

[0042] Select the target electrical behavior template (such as the limiting template, filtering template, buffering presentation template, etc.) based on the fault semantics.

[0043] 4. Behavior Template Scaling

[0044] The target behavior is scaled according to the fault amplitude to obtain the target electrical behavior consistent with the fault intensity.

[0045] 5. Mapping function M(I) eq Z eq )

[0046] Mapping "semantics + amplitude" to equivalent current source parameter I eq With equivalent impedance parameter Z eq .

[0047] 6. Interface Electrical Behavior Reconfiguration (V out / I out )

[0048] Based on the generated equivalent model parameters, controllable interface electrical behavior is output, achieving decoupling and limiting from the actual low-voltage fault behavior. This will be illustrated with specific examples below.

[0049] Example 1: Fault current shaping example at medium and low voltage interfaces

[0050] This embodiment 1 is applied to a scenario where fault current can be controlled at the medium- and low-voltage interface. Through five steps—semantic recognition, amplitude quantization, behavior template selection, equivalent parameter generation, and interface behavior reconstruction—it achieves decoupling and amplitude limiting control between the fault current sensed on the medium-voltage side and the actual fault behavior on the low-voltage side. Specifically:

[0051] (1) Semantic extraction of low-voltage side faults

[0052] When a fault occurs in a low-voltage power distribution system, the edge-side detection device collects transient waveforms of voltage and current, and identifies fault semantics through an event classification model, such as single-phase grounding, phase-to-phase short circuit, three-phase short circuit, arc fault, and overload disturbance. The identification results serve as "semantic labels" for the event, which are used for the selection of subsequent behavior templates.

[0053] (2) Extraction of fault amplitude or characteristic quantity

[0054] Simultaneously, the system extracts fault amplitude indicators based on the acquired waveforms, such as the ratio of the peak fault current to the rated value. The estimated values ​​of transient high-frequency content, negative sequence component amplitude, voltage sag depth, and fault impedance, and any one or a combination of these indicators can be used as quantitative inputs for "fault amplitude severity". This amplitude is used to adjust the intensity of the presentation of the target electrical behavior.

[0055] (3) Target electrical behavior template selection

[0056] Based on the fault semantics, a target electrical behavior template is selected from a set of preset templates. Template examples include, but are not limited to:

[0057] Current limiting template: Used for short-circuit faults to ensure that the current observed on the medium-voltage side does not exceed [the specified limit]. .

[0058] Soft-ramping: Used for arcing or minor grounding faults to control the rate of change in fault response.

[0059] Transient filtering template: used to suppress transient high-frequency components and avoid triggering false tripping of medium-voltage side protection.

[0060] Each template describes the shape and pattern of the electrical behavior of the target interface, without specifying specific parameters.

[0061] (4) Combined scaling of template and amplitude

[0062] The behavior template is scaled using the magnitude severity. For example:

[0063]

[0064]

[0065] in: , It can be obtained through offline calibration; the "semantics" determines the function structure, and the "amplitude" determines the output magnitude; thus forming an electrical behavior target consistent with the specific fault intensity.

[0066] (5) The mapping function generates the parameters of the equivalent electrical model.

[0067] This invention utilizes an internal mapping function. The semantics and amplitude are converted into a set of parameters that can be directly used for interface control. Among these, the equivalent current source parameters... Used to control the amplitude and direction of current. Equivalent impedance parameter Used to adjust the dynamic characteristics of interface voltage and current. Of course, this is just an example and does not limit the specific form of the mapping function; it can be a linear mapping, lookup table, rule base, or machine learning model.

[0068] (6) Reconstruction of interface output electrical behavior

[0069] Based on the generated equivalent model parameters, the actual output at the interface satisfies: This achieves: output current limiting (not exceeding a preset threshold); controlled transient response; controllable fault behavior observed on the medium-voltage side; and decoupling of the medium-voltage side fault response from the actual low-voltage fault behavior.

[0070] For example, when a short circuit of 8 × rated current occurs at low voltage, the present invention can make the medium voltage side see: a limited current of only 1.5 × rated current to 2 × rated current; transient high frequency components are kept within a controllable range; and over-trip signals are blocked; thereby achieving "low voltage faults no longer cause excessive reactions in the medium voltage system".

[0071] Example 2: A Case Study of a Method for Reconstructing the Electrical Behavior of a Limiting Interface under a Three-Phase Short-Circuit Fault

[0072] This Example 2 will explain how, when a three-phase short-circuit fault occurs on the low-voltage side, the equivalent electrical behavior of the interface is generated based on "fault semantics + amplitude," so that the medium-voltage system only senses the controlled, limited-amplitude fault current, avoiding cascading tripping and achieving fault behavior decoupling. Specifically, as follows:

[0073] (1) Semantic recognition of three-phase short circuit on the low-voltage side

[0074] When a fault occurs in a low-voltage power distribution system, the edge monitoring device collects the phase voltage and phase current waveforms. If the following typical characteristics are met: the three-phase current rises rapidly and is close to synchronous; the three-phase voltage drops significantly; and the transient components are short in duration and high in energy, then the event is identified as: fault semantic: three-phase short circuit (3P short circuit); this semantic label is used in this invention to select the "limiting template".

[0075] (2) Fault amplitude quantization

[0076] In this embodiment, the ratio of the peak value of the low-voltage side fault current to the rated current is used as the "amplitude severity". For example, the actual measured rated current is: =100A, peak short-circuit current: =850A, then: severity=8.5, this value will determine the adjustment ratio of the limiting target.

[0077] (3) Selection of limit behavior template

[0078] For the semantics of "three-phase short circuit," in this example, the default selection of this invention is: Current Limiting Template. The template is described as follows: the maximum fault current observed on the medium-voltage side does not exceed a certain controllable value. The ramp rate is controlled to avoid transient triggering of the medium-voltage protection; three-phase symmetrical output prevents unnecessary negative sequence injection. The template does not limit specific parameters, but defines a "limited + controlled presentation" behavior.

[0079] (4) Amplitude-driven template scaling

[0080] A severe low-voltage fault does not require a strong manifestation of medium-voltage synchronization; therefore, this invention employs a scaling strategy: ;in, As the no-load interface current reference, The limiting factor for a three-phase short-circuit scenario is severity = 8.5. A typical scaling result might be: actual low-voltage short-circuit current: 8.5 × rated; target presenting current for medium-voltage: 1.8 × rated (limited); achieving "weak presentation of strong faults".

[0081] (5) The mapping function generates the parameters of the equivalent electrical model.

[0082] This invention utilizes an internal mapping function: Generate: Equivalent current source parameters (Specified maximum output current limit); Equivalent impedance parameters (Reducing current injection by increasing the equivalent impedance).

[0083] For example: I eq Set to 1.8 times the rated current; Z eq The current is appropriately increased as severity increases to achieve current clamping.

[0084] (6) Interface output electrical behavior reconfiguration

[0085] The final interface output satisfies: Therefore, even if the short-circuit current on the low-voltage side reaches 8.5 times the rated current, the current observed on the medium-voltage side is only about 1.8 times the rated current; three-phase faults can still be handled by the low-voltage side's own protection; the medium-voltage side will not experience cascading tripping or maloperation due to abnormally large currents.

[0086] (7) Implementation results

[0087] This embodiment achieves: fault current limiting: the actual short-circuit current peak is no longer seen on the medium-voltage side; cross-layer decoupling: severe low-voltage faults will not be amplified through the coupling path to trigger medium-voltage interlocking protection; transient controllability: avoids the failure or false operation of the upper-level protection due to excessive transient energy of three-phase short circuits; enhanced distribution network resilience: the medium-voltage system has "weak perception" of severe low-voltage faults, improving overall stability.

[0088] Example 3: A Case Study of a Method for Reconstructing the Electrical Behavior of a Soft-Presence Interface in an Arc Fault Scenario

[0089] To illustrate the applicability of this invention in asymmetric, intermittent disturbance-type fault scenarios, this embodiment 3 presents how, when an arc fault occurs on the low-voltage side, a controlled interface equivalent behavior is generated through "fault semantics + amplitude," so that the medium-voltage side only perceives a smooth, limited, and controllable fault presentation, thereby avoiding false protection and improving the resilience of the distribution network. Specifically:

[0090] (1) Semantic recognition of arc faults

[0091] Low-voltage arc faults have the following typical characteristics: the current is sawtooth-shaped or intermittently spiked; the transient high-frequency energy is large; the pulses are irregular and repetitive, which are different from the traditional short-circuit waveforms; and the three phases are unbalanced (more common in single-phase arcs).

[0092] Based on characteristics such as transient energy, waveform abruptness, and high-frequency components, the event recognition module identifies the fault as: Arc Fault. This semantic is used to select the "softening + filtering" behavior template.

[0093] (2) Quantification of fault amplitude

[0094] In this embodiment 3, the ratio of the peak current of the arc fault to the rated current is used as the amplitude severity. For example: Rated current: =80A, peak short-circuit current: =240A, then: severity=3.0.

[0095] It is evident that although the amplitude of an arc fault is lower than that of a short circuit, its characteristics of "high frequency + intermittent + unstable" make it more likely to cause maloperation of the upper-level protection, thus requiring special behavioral shaping.

[0096] (3) Select a slow-release electrical behavior template

[0097] For the semantics of "electric arc fault", this invention predefines the following behavior templates:

[0098] Soft-Presentation Template: Presents the peak current time change rate... Limit to a controllable range; smooth out irregular pulses, manifesting as slow rises / falls.

[0099] High-frequency filtering template: suppresses high-frequency (>2kHz) components of the electric arc; makes the medium-voltage side see "smoothed disturbances" rather than real spikes.

[0100] Low-level Limiting Template: Prevents pulse peaks from triggering protection setting thresholds on the medium-voltage side.

[0101] These templates collectively define the target electrical behavior of arc faults.

[0102] (4) Amplitude-driven template scaling

[0103] The greater the arc intensity, the greater the required disturbance amplitude should be. This invention employs a scaling strategy:

[0104]

[0105]

[0106] in, For arc faults, the limiting factor is... The maximum current change slope (gradually regular) determines the template strength.

[0107] For example, the actual peak value of the electric arc is 240A, while the medium-voltage side only exhibits a smooth disturbance waveform of 110–130A; that is, the strong spike is transformed into a mild and controllable disturbance.

[0108] (5) The mapping function generates equivalent model parameters

[0109] Mapping function:

[0110] The mapping generates model parameters that can realize the template. Result characteristics: The transient components are weakened (amplitude limiting + smoothing). Increase the frequency band (filtering function); the output exhibits controlled disturbances, rather than the original spikes.

[0111] (6) Actual output behavior of interface reconstruction

[0112] Interface final output This is manifested in the following ways: the current waveform is smooth and without spikes; the rising / falling slope is controlled; high-frequency energy is suppressed (the medium-voltage side will not misjudge it as resonance or transient fault); and the amplitude is much lower than the actual arc current.

[0113] For example: the peak value of the low-voltage real arc waveform is 240A, containing high-frequency spikes; on the medium-voltage side, a gentle disturbance of around 110A is observed, with no obvious high-frequency components.

[0114] (7) Implementation results

[0115] This embodiment 3 achieves the following: suppressing high-frequency spikes in electric arcs → avoiding maloperation of medium-voltage protection; electric arcs generate irregular pulse sequences, which medium-voltage protection may misinterpret as: high-frequency resonance; line flashover; unbalanced tripping conditions. These effects are eliminated through a filtering template. Electric arc faults are no longer amplified across layers. Electric arcs are low-voltage events, and medium-voltage protection should not be responsible for protection actions.

[0116] It should be noted that the examples of the above embodiments can preferably be combined with one or more of each other according to actual needs, and the accompanying drawings of multiple examples adopt a set of combined technical features, which will not be described in detail here.

[0117] The above description is a detailed explanation and illustration of the preferred embodiments of the present invention. However, these descriptions are not intended to limit the scope of protection claimed by the present invention. All equivalent changes or modifications made under the technical teachings of the present invention should fall within the patent protection scope covered by the present invention.

Claims

1. A method for maintaining electrical semantics and sensing consistency under fault conditions, characterized in that, Includes the following steps: Identification Output: Based on the identified fault semantics and intensity indicators of the low-voltage side of the power distribution system, select the target electrical behavior template of the medium-voltage side corresponding to the fault semantics, generate equivalent electrical parameters based on the intensity indicators and the amplitude function of the fault amplitude, and reconstruct the output target interface electrical behavior.

2. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that, The process also includes the following steps: Model building: setting fault semantics for fault types on the low-voltage side of the power distribution system; setting the amplitude function for the fault amplitude of each fault semantic; converting each fault semantic and fault amplitude into equivalent electrical parameters through a mapping function; setting the target electrical behavior template for the medium-voltage side; Associate each type of fault semantics with the corresponding target electrical behavior template and equivalent electrical parameters.

3. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that: The fault semantics include single-phase grounding, phase-to-phase short circuit, three-phase short circuit, arc fault, and overload disturbance semantics.

4. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 3, characterized in that: The fault semantics are characterized by one or more combinations of current phase relationships, sequence component structure, and rate of change characteristics.

5. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that: The intensity index is characterized by one or more combinations of the collected voltage and current.

6. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that: The fault amplitude is specifically one or more combinations of the ratio of the peak fault current to the rated value, the transient high-frequency content, the amplitude of the negative sequence component, the voltage drop depth, and the fault impedance estimate.

7. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that: The target electrical behavior templates include amplitude limiting templates, slow-release templates, and filtering templates.

8. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 7, characterized in that: Each type of fault semantic is associated with one or more combinations of limiting templates, slow-presentation templates, and filtering templates.

9. The electrical semantics maintenance and perception consistency control method under fault conditions according to claim 1, characterized in that: The equivalent electrical parameters are one or more combinations of equivalent current source parameters and equivalent impedance parameters.

10. A control system for maintaining electrical semantic consistency and perception consistency under fault conditions, characterized in that, include: Identification Module: Used to identify output: Based on the identified fault semantics and intensity indicators of the low-voltage side of the power distribution system, select the target electrical behavior template of the medium-voltage side corresponding to the fault semantics, generate equivalent electrical parameters based on the intensity indicators and the amplitude function of the fault amplitude, and reconstruct the output target interface electrical behavior.

11. The electrical semantic maintenance and perception consistency control system under fault conditions according to claim 10, characterized in that, Also includes: Building Module: Used to build the model: sets the fault semantics for fault types on the low-voltage side of the power distribution system; Set the amplitude function for the fault amplitude of each type of fault semantic; Each type of fault semantics and fault amplitude is converted into equivalent electrical parameters through a mapping function; a target electrical behavior template for the medium-voltage side is set. Associate each type of fault semantics with the corresponding target electrical behavior template and equivalent electrical parameters.

12. A control device for maintaining electrical semantics and sensing consistency under fault conditions, characterized in that: It includes a processor and a memory, wherein the memory stores a control program, which is executed by the processor to implement the control method according to any one of claims 1-9.

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