Intelligent isolation and authorization control method for high-voltage operation area of new energy station area

Abstract

The invention discloses an intelligent isolation and authorization control method for a high-voltage operation area in a new energy station area, and the method comprises the steps: receiving an electronic operation application, building a potential risk assessment model based on time sequence characteristics and electrical topology, and calculating a live risk index; extracting surface coordinate points and an outer normal direction according to the equipment digital geometric model, and constructing a dynamic three-dimensional operation fence comprising a forbidden area and a buffer area; the identity information of the operator, the wearing state of the protective equipment and the electronic identification of the tool are verified, and a one-time dynamic authorization token is generated in combination with the action signature abstract; before an operator enters, joint verification is carried out, and the operator is allowed to enter when verification is passed; in the operation process, abnormal response is executed according to the monitoring result; dynamic isolation control and multi-dimensional access verification of an operation area are realized, so that the safety of the operation process is guaranteed under the condition of real-time change of an electrical state, and a verifiable and traceable whole-process safety management closed loop is formed.

Description

A method for intelligent isolation and authorized control of high-voltage operation areas in new energy power stations Technical Field

[0001] This invention belongs to the field of new energy power station area management and relates to a method for intelligent isolation and authorized control of high-voltage operation areas in new energy power stations. Background Technology

[0002] With the large-scale construction of new energy power generation facilities, the number of high-voltage equipment in wind farms, photovoltaic power stations, and energy storage systems has increased significantly, and the complexity of the electrical structure within the station area has been continuously increasing. High-voltage operation scenarios involve multiple safety control aspects such as electrical isolation, equipment maintenance, and operation monitoring. Any operational error may lead to serious accidents such as arc discharge, accidental closing, and electric shock. Therefore, how to ensure operational safety while maintaining operational continuity has become an important issue in the operation and management of new energy power stations.

[0003] Currently, new energy power station areas mostly use methods such as manual signage, static fencing, card access control, and video surveillance for safety protection and access management of high-voltage work areas. While these methods offer some protection, they have significant shortcomings: First, the spatial protection boundaries are fixed and difficult to dynamically adjust according to changes in electrical conditions; second, personnel access relies on a single authorization process, lacking comprehensive verification of identity, protection status, and electrical safety; third, monitoring of the work process is lagging, and abnormal responses rely on manual handling; fourth, the lack of accurate records of work activities makes full-process traceability impossible, resulting in significant difficulties in identifying safety risks and tracing responsibility. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent isolation and authorization control method for high-voltage operation areas in new energy power stations. This method enables dynamic isolation control and multi-dimensional access verification of the operation area, thereby ensuring the safety of the operation process under real-time changes in electrical status and forming a verifiable and traceable closed-loop safety management system.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a method for intelligent isolation and authorized control of high-voltage work areas in new energy power stations, comprising the following steps: receiving electronic work applications; determining the target work area based on the primary wiring topology of the new energy power station; collecting real-time operating data; establishing a potential risk assessment model based on time-series characteristics and electrical topology; calculating the energized risk index; extracting surface coordinate points and external normal directions based on the equipment's digital geometric model; calculating the safety distance using voxelization combined with the rated voltage level; and constructing a dynamic three-dimensional work fence including prohibited areas and buffer zones; verifying the identity information of the workers and the status of their protective equipment. Electronic tags for tools and equipment are combined with action signature summaries to generate one-time dynamic authorization tokens. Before personnel enter, the validity of the dynamic authorization token, the status of protective equipment, the electrical risk index, and the personnel's location coordinates are jointly verified. Entry is permitted when all verifications pass. During the operation, the personnel trajectory is monitored using data fusion of inertial measurement units and positioning signals. At the same time, the potential change trend of the work area, the status of protective equipment, and environmental parameters are monitored, and abnormal responses are executed based on the monitoring results. After the operation is completed, an off-site review is performed. The credibility score of the behavior is calculated based on the data of the entire operation process, and the score result and the operation record are combined to generate a hash chain summary and written into the audit ledger.

[0006] Optionally, the potential risk assessment model comprehensively considers the electrical connection relationship between equipment nodes and the time change trend of state variables; when the calculated live risk index is less than the preset safety threshold, the work area is determined to be in a workable state; when the live risk index exceeds the preset safety threshold, subsequent operations are automatically blocked.

[0007] Optionally, the steps for constructing a dynamic three-dimensional work fence include: converting the equipment surface into a spatial grid structure; calculating the minimum safe distance based on the rated voltage value, electric field strength coefficient, and structural compensation amount; defining the space within the minimum safe distance as a restricted area, and defining the area extending outward from the restricted area as a buffer zone; and expanding the spatial points along the outer direction according to the outer normal direction of the equipment surface to form the restricted area boundary and the buffer zone boundary.

[0008] Optionally, during the operation, when a change in the electrical status of the busbar, disconnector, or transformer is detected, the safety distance is recalculated and the spatial boundary is adjusted based on the updated equipment status to reconstruct the three-dimensional operation fence; when the volume difference between the old and new fences exceeds a set threshold, a reconstruction verification prompt is issued.

[0009] Optionally, the steps for generating a one-time dynamic authorization token include: collecting the acceleration, direction change, and duration of the action when the operator performs a standard action, and extracting the inertial feature vector as the action signature digest; encrypting the personnel number, task number, work fence number, authorization start and end time, tool feature digest, and action signature digest to generate a dynamic authorization token.

[0010] Optionally, the specific criteria for joint verification are: the current time is within the valid time window of the dynamic authorization token and the token has not been revoked; the confidence level of the protective equipment identification is higher than the set lower limit; the live-line risk index is lower than the safety threshold; and the personnel location coordinates are located outside the buffer zone or outside the fence of the dynamic three-dimensional operation fence.

[0011] Optionally, in the operation process monitoring steps, when the personnel position is detected to deviate from the permitted area by more than the set deviation, a buffer warning is triggered; when the potential gradient rise rate is detected to exceed the safety limit, the operation stop procedure is started and the operation area is locked; when the ambient humidity or wind speed is detected to exceed the allowable range, the operation is suspended.

[0012] Optionally, the abnormal response is divided into three levels: Level 1 is an alert, which issues an audible and visual warning; Level 2 is a control stop, which stops operation permissions and freezes the dynamic authorization token; Level 3 is an emergency lockout, which executes the area power cut-off and electronic access control lock.

[0013] Optionally, the behavioral credibility score is calculated based on whether there are any violations or overstepping of boundaries in the operation process, whether the post-processing of abnormal responses complies with the specifications, whether the dynamic authorization token is used within the validity period, and whether the action signature is consistent with the original application; the hash chain digest adopts a chain encryption mechanism based on timestamps.

[0014] A smart isolation and authorization control device for high-voltage operation areas in new energy power stations includes: a potential risk assessment unit, connected to transformers, disconnect switches, and busbars to collect real-time voltage and current signals and calculate a potential risk index based on topological connections; a three-dimensional fence construction unit, which constructs a three-dimensional spatial model of electrical equipment based on equipment geometric parameters and rated voltage levels, and adjusts the spatial boundaries according to changes in electrical status; an identity and tool verification unit, including an identity recognition module, a protection detection module, and a tool verification module, used to verify personnel identity, protective equipment status, and tool list; an access control unit, which receives authorization tokens and location information, and verifies the validity of authorization, protection status, potential safety, and location legality; an operation process monitoring unit, including a location monitoring module, a protection status verification module, a potential trend monitoring module, and an environmental detection module, used to collect the status of the entire operation process; a behavior auditing unit, used to calculate the behavior credibility score and generate a hash chain record after the operation is completed; and a central processing control module, connected to the potential risk assessment unit, the three-dimensional fence construction unit, the identity and tool verification unit, the access control unit, the operation process monitoring unit, and the behavior auditing unit via a data bus.

[0015] Compared with existing technologies, this invention has the following advantages: By dynamically coupling electrical state, spatial boundaries, and personnel authorization, this invention fundamentally solves the problem that traditional static isolation cannot respond to real-time potential changes. It quantifies abstract potential risks using temporal characteristics and topological relationships, and drives the three-dimensional work fence to be reconstructed in real time according to the equipment's opening and closing status, achieving state-driven spatial isolation. Simultaneously, it constructs a multi-dimensional dynamic token covering identity, protection, tools, and action signatures, forcibly enforcing real-time interlocking verification of entry criteria, ensuring that the work process is under full closed-loop dynamic monitoring of risk identification, boundary construction, authorization control, process monitoring, and behavior auditing, thereby significantly improving the inherent safety level and accountability of high-voltage operations. Attached Figure Description

[0016] Figure 1 is a flowchart illustrating a method for intelligent isolation and authorized control of high-voltage operation areas in new energy power stations according to Embodiment 1 of the present invention; Figure 2 is a flowchart illustrating the modules and workflow of an intelligent isolation and authorized control device for high-voltage operation areas in new energy power stations according to Embodiment 2 of the present invention. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] Example 1 This example relates to the field of high-voltage operation safety management in new energy power station areas, and provides a method for intelligent isolation and authorized control of high-voltage operation areas in new energy power station areas.

[0020] This method achieves intelligent isolation and full-process safety control of high-voltage work areas by establishing a work area potential risk model, generating dynamic three-dimensional work fences, performing multi-dimensional personnel and tool verification, implementing entry safety criteria and on-site monitoring, and combining hash chain behavior auditing.

[0021] As shown in Figure 1, the execution flow of the entire method includes the following main stages: 1. Work application and potential risk assessment stage: electrical status collection and risk prediction of the target work area to determine the safety of live equipment; 2. 3D work fence generation stage: calculation of safety distance based on equipment geometry and voltage level to form dynamic restricted and buffer zones; 3. Personnel and tool verification stage: identity verification, protection detection, and tool fingerprint comparison to generate a one-time dynamic authorization token; 4. Entry verification and safety interlock stage: real-time judgment of four criteria: token, protection, potential, and location, allowing entry only if the conditions are met; 5. Work monitoring and anomaly response stage: continuous verification of work status, and execution of interlocking warnings when boundary crossing or risk increase is detected; 6. Exit verification and behavior audit stage: calculation of behavior credibility score and formation of an immutable hash chain record to achieve full-process traceability.

[0022] Through the above process, this method forms a closed-loop logic of risk identification, boundary construction, authorization control, process monitoring, and behavior auditing in new energy station areas, which significantly improves the inherent safety level and information management capabilities of high-voltage operations.

[0023] To make the technical solution of this invention clearer and more complete, the method of this invention will be further described below with reference to Embodiment 1. The intelligent isolation and authorized control method for high-voltage work areas in new energy power stations described in this embodiment constructs a full-process safety control logic from risk identification to behavior auditing through comprehensive analysis of the electrical status, spatial geometric information, personnel identity, and protection status of the work area. This method, with real-time monitoring and dynamic criteria as its core, realizes intelligent isolation and authorized management of high-voltage work areas, exhibiting significant safety and operability.

[0024] For ease of understanding, this embodiment divides the main execution flow of the method into several key steps, with logical connections between each step and sequential execution, as follows: S1. Work application and potential risk assessment Before performing high-voltage work in the new energy station area, the operator must submit an electronic work application in advance. The application content includes the target equipment, work type, work time period and safety measures.

[0025] After receiving a work request, the method first determines the target work area and its adjacent equipment set based on the primary wiring topology of the station area, and then collects real-time operating data including the effective value of voltage, current magnitude, phase angle difference, disconnector switch position signal, local electric field strength, and ambient temperature and humidity.

[0026] To determine whether there is residual live electricity or risk of recirculation in the current work area, this method establishes a potential risk assessment process based on timing characteristics and electrical topology.

[0027] This process comprehensively considers the electrical connection relationship between equipment nodes and the time change trend of state variables, and calculates the live risk index ρ through the model to quantify the degree of electrical safety.

[0028] When the calculation result shows that the risk index is less than the safety threshold (preferred value is 0.2), the work area is determined to be in a workable state; if the risk index exceeds the threshold, subsequent operations will be automatically blocked and a discharge and isolation verification will be prompted.

[0029] The essence of this step is to transform the abstract safety status into quantifiable risk indicators based on real-time electrical data, ensuring that a reliable potential safety basis is obtained before entering the space isolation, thereby avoiding misjudgment or accidental entry into the energized area due to the lag in human judgment.

[0030] S2. Generation and Dynamic Update of 3D Work Fence: After the potential risk assessment is passed, the steps of generating and dynamically updating the 3D work fence are executed.

[0031] The goal of this step is to automatically construct a work safety boundary that corresponds to the potential state in real time, based on the spatial geometry of the equipment, its rated voltage level, and its current electrical state.

[0032] First, the method extracts surface coordinate points and outward normal directions from the digital geometric model of the device to form a basic three-dimensional point set.

[0033] Subsequently, the device surface was transformed into a spatial grid structure using voxelization, providing a computational basis for subsequent safe distance extension and spatial search.

[0034] For each type of live equipment, the minimum safe distance is calculated based on its rated voltage. This safe distance calculation comprehensively considers the electric field strength coefficient and structural compensation to ensure that equipment of different voltage levels meets the safe distance requirements of national standards.

[0035] Taking a 35kV busbar as an example, the safe distance is generally controlled at around 0.9 meters.

[0036] The space within this distance range is defined as a restricted area, where no work activities are permitted; a buffer zone is set out 30% to 50% beyond the restricted area for early warning purposes.

[0037] Subsequently, based on the outward normal direction of the device surface, the method expands each spatial point along the outer direction to generate the restricted area boundary, and further forms the buffer zone boundary.

[0038] The restricted area and the buffer zone together form a three-dimensional work fence, the shape of which strictly corresponds to the shape of the equipment and can accurately describe the risk distribution of the work space.

[0039] During operation, if a change in the electrical state of the busbar, disconnector, or transformer is detected (such as a circuit breaker changing from open to closed), the fence will be immediately re-triggered.

[0040] The method recalculates the safety distance and adjusts the spatial boundary based on the updated equipment status, thereby achieving dynamic linkage between electrical status and spatial isolation.

[0041] The delay in the reconstruction process is typically kept within 1 second to ensure that the fence responds in real time, moves smoothly, and does not have a security gap.

[0042] After the fence is constructed, the method will also perform boundary volume and continuity verification. When the volume difference between the old and new fences exceeds the set threshold (usually 10%), a reconstruction verification prompt will be issued to prevent spatial misalignment due to misreading of status or coordinate offset.

[0043] Verified fence data is saved as a set of spatial coordinates, providing a basis for subsequent personnel location determination and security access verification.

[0044] This step dynamically correlates equipment geometry with its energized state to form a real-time updated safety space boundary, significantly improving the accuracy of electrical protection during operations. Compared to traditional static electronic fences, the dynamic fence of this invention can reflect potential change characteristics, thereby achieving state-driven spatial isolation, which is the core innovation of this method.

[0045] S3. Personnel and Tool Verification and Authorization Token Generation: After the work fence is generated, the personnel and tool verification and authorization stage begins.

[0046] This step aims to ensure that personnel entering the work area are authentic, protective measures are in place, and tools are correctly matched, and to generate an authorization token that corresponds one-to-one with the specific work task.

[0047] First, perform authentication.

[0048] The method calls the personnel information recorded in the job application and compares it with the on-site identity verification data to confirm that the applicant and the personnel present are the same. Identity verification can be based on facial recognition code, work permit number, or encrypted identity tag. Only after verification that they match can the process proceed to the next step.

[0049] Secondly, conduct inspections of protective equipment.

[0050] The method performs image recognition and logical verification on the wearing status of equipment such as safety helmets, insulating gloves, protective boots, and protective masks. When the recognition confidence level is lower than a set value (preferably 0.9), the protection is deemed unqualified and the process is interrupted.

[0051] Subsequently, the tools and equipment were checked.

[0052] All tools required for the operation are equipped with electronic tags. By reading the tool codes and comparing them with the task list, the type and quantity of tools are determined to be consistent. For critical insulation tools, weight or shape characteristics are also compared to prevent substitution or omission.

[0053] After all personnel identities, protective equipment, and tools have been verified, the method initiates the action signature collection.

[0054] Operators perform several standard actions according to operating procedures, such as wearing protective gloves, confirming safety measures, and checking equipment for electrical faults. The method involves recording the acceleration, direction changes, and duration of these actions, and extracting inertial feature vectors as action signature summaries.

[0055] All verification results are used to generate a one-time dynamic authorization token in the form of a cryptographic digest.

[0056] The token contains: personnel number, job task number, work fence number, authorized start and end time, summary of tool characteristics used, and summary of action signature.

[0057] Authorization tokens are only valid within a specified time window and automatically expire outside the time window, ensuring that job authorizations are time-limited.

[0058] Through this series of operations, the method achieves a strong multi-dimensional binding relationship between personnel, tasks, tools, time, and space.

[0059] Once any identity, protection, or tool information changes, the original authorization token is deemed invalid, thereby preventing the risks of impersonation, proxy signing, or cross-operation.

[0060] S4. Entry Criterion Verification and Security Interlock Execution: After the authorization token is generated, the entry criterion verification and security control phase begins.

[0061] The purpose of this phase is to jointly assess the validity of a person's identity, protective status, potential risk, and the legality of their location when they approach the entrance to the high-voltage work area, ensuring that the access process is strictly controlled.

[0062] Specifically, the following four criteria are included: 1. Authorization validity criterion: The method checks whether the current time is within the token's valid time window and confirms that the token has not been revoked. If the time exceeds the window or the token is suspended, entry is directly denied.

[0063] 2. Criteria for Qualification of Protective Equipment: Continuously monitor the wearing status of protective equipment. If the confidence level drops to the set lower limit (usually 0.85), the entry permit will be suspended immediately.

[0064] 3. Potential safety criterion: Read the real-time potential risk index ρ. If ρ is lower than the safety threshold (0.2), it is considered safe. Otherwise, entry into the area is prohibited and an audio-visual warning is issued.

[0065] 4. Location Compliance Criteria: The personnel's location coordinates are determined through positioning signals. Positioning data can come from ultra-wideband ranging, inertial navigation, or high-precision positioning signals. The method performs weighted fusion of multi-source data to eliminate drift and fluctuations.

[0066] When a person's coordinates are outside the fence or the outer layer of the buffer zone, the location is considered legitimate; if they enter the inner layer of the buffer zone, an alert is triggered; if they enter the restricted area, entry is immediately denied.

[0067] The method only allows workers to enter the high-voltage work area when all four criteria are met simultaneously.

[0068] If any criterion fails, the work area remains closed, and the person in charge of the work is notified via voice prompts and information recording.

[0069] Once personnel enter, these four criteria do not terminate but are automatically re-executed at a set period (e.g., every second), forming a continuous presence security verification mechanism.

[0070] If a token malfunction, security anomaly, or out-of-bounds location is detected during operation, the method immediately triggers a safety interlock to prevent further operation.

[0071] This phase ensures that access to high-voltage work areas is strictly based on real-time status criteria.

[0072] Compared to traditional manual access control or static authorization methods, this method achieves simultaneous verification of identity, protection, space and electrical status, fundamentally avoiding the problems of personnel accidentally entering and authorization mismatch during live-line work.

[0073] S5. Work Process Monitoring and Anomaly Response: After personnel enter the work area, this method continuously performs on-site status monitoring and risk detection to ensure that the high-pressure work process is under full control.

[0074] The operation monitoring process includes four dimensions: personnel trajectory tracking, potential trend analysis, protection status verification, and environmental parameter collection.

[0075] First, personnel trajectory monitoring is achieved through the fusion of inertial measurement unit (IMU) and UWB positioning, recording the movement path of workers within the work area.

[0076] The method compares real-time location with a dynamic work fence model. If a person's position deviates from the permitted area by more than a set deviation (e.g., 0.3 meters), a buffer zone warning is immediately triggered. If the person continues to approach the restricted boundary, an audible and visual alarm is triggered, and work authorization is suspended.

[0077] Secondly, potential change monitoring determines whether the electrical condition is abnormal by sampling the voltage and current change trends of key nodes in the work area. If the potential gradient rise rate exceeds the safety limit (e.g., 5V / cm·s), the method identifies a potential risk of induced voltage backflow, automatically initiates the work stoppage procedure, and locks the current work area.

[0078] In addition, the protection verification uses a visual recognition algorithm to detect the status of protective equipment in real time and determine whether there are any issues such as detachment or displacement.

[0079] If the test results show that the protection confidence level has dropped to the set lower limit, the system will determine that the protection is abnormal and issue a warning signal.

[0080] Meanwhile, the environmental monitoring module collects environmental parameters such as humidity, temperature, and wind speed in real time. If the environmental parameters exceed the allowable range (e.g., humidity exceeds 90% or wind speed is greater than 12m / s), the operation will be automatically suspended and personnel will be prompted to evacuate.

[0081] When any monitoring dimension generates an anomaly, this method enters the anomaly response phase.

[0082] Abnormal responses are divided into three levels: Level 1 is a warning, which only issues an audible and visual warning and prompts operators to keep their distance.

[0083] Level 2 is for control suspension, stopping operation permissions and freezing authorization tokens.

[0084] Level 3 is an emergency lockout, which involves cutting off power to the area and locking the electronic access control system, prohibiting any further operations.

[0085] The exception handling record will be associated with the authorization token and personnel identity information, and written to the behavior audit log for subsequent security analysis and tracing.

[0086] This step realizes a full-dimensional monitoring and hierarchical response mechanism from spatial status, electrical status to environmental status, effectively avoiding the problems of delayed discovery and untimely response in traditional manual inspections, and ensuring that the entire operation is under dynamic safety monitoring.

[0087] S6. After the off-site review and behavior audit are completed, this method performs off-site review and behavior audit to close the entire security management chain.

[0088] The goal of the off-site verification is to confirm that the operation has been completed as planned, the equipment is in a safe condition, and all personnel and tools have left the area without any omissions.

[0089] First, the method determines whether all authorized personnel have left the work area based on the work fence boundary coordinates and personnel location information. If personnel are detected still in the restricted area or buffer zone, a departure prompt is issued and the termination of authorization is temporarily suspended.

[0090] At the same time, the electronic tags of tools and equipment are counted. If the quantity does not match the authorized task, the abnormal item is automatically recorded and an audit alarm is generated.

[0091] After all personnel and tools have been evacuated, an electrical verification is performed following the execution of the procedure.

[0092] By reading the voltage, current, and switch status of the target device, it can be confirmed that it has been restored to the pre-operation state or the predetermined safe state, preventing live wires or omissions in isolation.

[0093] The behavioral audit phase then begins.

[0094] The method comprehensively analyzes the trajectory data, protection status data and abnormal response records collected throughout the operation to calculate the behavior credibility score.

[0095] Credibility scores are determined based on the following factors: whether there are any violations or boundary crossings during the operation.

[0096] Does the post-processing of abnormal responses comply with the standards?

[0097] Whether the authorization token is used within its validity period.

[0098] Does the action signature match the original application?

[0099] The scoring range is 0 to 100 points, with 90 points or above considered safe operation, 70 to 90 points considered minor deviation, and below 70 points considered risky operation.

[0100] The scoring results and the corresponding job records are combined to generate a hash chain digest, which is then written into the behavior audit ledger.

[0101] The hash chain digest uses a timestamp-based chain encryption mechanism to ensure that behavioral data is tamper-proof and traceable.

[0102] After the behavior audit is completed, the method automatically revokes the authorization token for the current job and archives the job log.

[0103] All recorded data can be traced back to specific personnel, time, and equipment, achieving a verifiable closed-loop management system for the entire high-pressure operation process.

[0104] This step enables a natural transition from safety control to safety auditing during the off-site phase, ensuring safety during the operation execution phase and providing data support for subsequent safety analysis and incident review.

[0105] In summary, the intelligent isolation and authorization control method for high-voltage operation areas in new energy power stations provided in this embodiment establishes a closed-loop safety control system covering the entire process from pre-operation risk assessment to post-operation behavior auditing. This method first achieves electrical safety determination of the high-voltage operation area through real-time electrical status acquisition and potential risk modeling; then, it generates a dynamic three-dimensional operation fence based on equipment geometric features and voltage levels, achieving synchronous linkage between electrical status and spatial isolation; next, it generates dynamic authorization tokens through personnel identification, protective status detection, and tool verification to ensure strict control over the access process; simultaneously, it introduces a multi-dimensional criterion verification mechanism to achieve joint judgment of identity, protection, location, and potential, ensuring safety upon entry; during the operation phase, it establishes a graded anomaly response logic through multi-source fusion monitoring of trajectory, environment, and potential; finally, during the departure phase, it performs review and behavior credibility auditing, recording all process data in the form of a hash chain to achieve traceability and immutability of operation behavior.

[0106] The method of this invention realizes dynamic closed-loop control of electrical safety, spatial isolation, identity authorization, process monitoring and behavior traceability in high-voltage operation scenarios in new energy power stations. It not only improves the inherent safety level of operators, but also provides data-driven and intelligent safety management and control methods for new energy operation and maintenance management, which has significant innovation and engineering promotion value.

[0107] Example 2 This example provides an intelligent isolation and authorization control device for high-voltage work areas in new energy power stations, used to realize the full-process intelligent control of the method described in Example 1. This device is mainly applied to the step-up substation, high-voltage switchyard, and grid-connected line maintenance areas in new energy power station areas, and achieves dynamic isolation and authorization management of high-voltage work areas through integrated hardware and software design.

[0108] I. Overall Structure of the Device The device consists of the following functional units: potential risk assessment unit, three-dimensional fence construction unit, identity and tool verification unit, access control unit, operation process monitoring unit, and behavior audit unit.

[0109] The various units are connected via a data bus and are uniformly scheduled and executed by a central processing control module. The entire device interacts with the main control platform of the station area via a wireless communication interface to achieve remote status monitoring and the distribution of safety policies.

[0110] II. Potential Risk Assessment Unit This unit includes a signal acquisition module and a risk calculation module.

[0111] The signal acquisition module receives real-time voltage and current signals from transformers, disconnect switches, busbars, and grounding circuits, and acquires auxiliary parameters such as electric field strength and ambient temperature and humidity.

[0112] The risk calculation module calculates the potential risk index based on topological connections and temporal trends. When the index exceeds the safety threshold, it sends a risk lockout command to the central control module. This unit constitutes the pre-processing logic for the entire safety assessment, providing the foundation for work access.

[0113] III. 3D Fence Construction Unit This unit includes a spatial modeling module and a dynamic update module.

[0114] The spatial modeling module constructs a three-dimensional spatial model of the electrical equipment and generates an initial work fence based on the equipment's geometric parameters and rated voltage level.

[0115] The dynamic update module monitors the electrical status in real time. When it detects a change in the status of a circuit breaker or isolating switch, it automatically adjusts the spatial boundary of the fence to form a dynamic three-dimensional safety fence that can respond in real time.

[0116] The fence data is stored in a coordinate set and periodically synchronized with the on-site positioning system to ensure boundary accuracy.

[0117] IV. Identity and Tool Verification Unit This unit includes an identity recognition module, a protection detection module, and a tool verification module.

[0118] The identity recognition module verifies the identity of the operator by using encrypted identity tokens or biometric identification; the protection detection module uses visual recognition algorithms to determine whether the wearing status of protective equipment meets the standards; and the tool verification module compares the tool list with the authorized tasks based on electronic tags.

[0119] Once all three verification results are passed, the central control module generates a one-time dynamic authorization token. This token contains information such as personnel number, task number, time window, and fence number, and has the characteristic of being uncopyable.

[0120] V. Access Control Unit This unit receives the authorization token and location information, and performs real-time verification of four security criteria: authorization validity, protection status, electrical safety, and location legitimacy.

[0121] When all four criteria are met, an access permission signal is issued, allowing personnel to enter the work area; if any criterion is not met, the area remains locked and an exception log is generated.

[0122] The unit contains a logic decision module and a safety interlock module to ensure that authorization and entry actions correspond one-to-one and cannot be bypassed.

[0123] VI. Operation Process Monitoring Unit This unit includes a location monitoring module, a protection status verification module, a potential trend monitoring module, and an environmental monitoring module.

[0124] Its function is to continuously collect status data and make safety judgments throughout the entire operation process.

[0125] When a boundary violation, increased risk of electrical energization, protection failure, or environmental deterioration is detected, a three-level response is immediately triggered: warning, work stoppage, or emergency interlock.

[0126] The response signal is simultaneously sent to the central control module and the station area safety management terminal to achieve remote linkage control.

[0127] VII. Behavioral Audit Unit: This unit performs data aggregation and behavioral credibility analysis after the work is completed.

[0128] Its internal scoring module calculates the credibility score of the behavior based on the trajectory deviation, response execution and token validity collected during the task; the result is generated into a hash chain record by the cryptographic digest module to ensure that the data cannot be tampered with.

[0129] The results of the behavioral audit are simultaneously uploaded to the safety management center to form a long-term safety record, providing a basis for subsequent risk assessment and personnel evaluation.

[0130] 8. Workflow is shown in Figure 2. The workflow of this device includes six stages: risk identification → fence construction → personnel verification → entry control → operation monitoring → exit audit.

[0131] The coordinated operation of each unit ensures the safety, controllability, and traceability of the entire high-voltage operation process in the new energy station area.

[0132] The diagram illustrates the functional units of this device and their data flow. Each unit forms a top-down control link, realizing a closed-loop management system from operational risk identification to behavior tracing.

[0133] In summary, the intelligent isolation and authorization control device for high-voltage work areas in new energy power stations provided in this embodiment combines electrical status sensing, spatial fencing, identity authorization, protection detection, and behavior auditing to achieve dynamic safety isolation and intelligent authorization management of high-voltage work areas. This device is compatible with existing safety monitoring systems in new energy power stations, possesses flexible scalability and versatility, and is suitable for high-voltage maintenance and live-line maintenance scenarios in wind power, photovoltaic, and energy storage stations, demonstrating significant safety improvement effects and widespread application value.

[0134] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0135] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

[0139] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this patent should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A method for intelligent isolation and authorized control of high-voltage operation areas in new energy power stations, characterized in that, The process includes the following steps: receiving electronic work applications; determining the target work area based on the primary wiring topology of the new energy station area; collecting real-time operational data; establishing a potential risk assessment model based on time-series characteristics and electrical topology; calculating the energized risk index; extracting surface coordinate points and outward normal directions based on the equipment's digital geometric model; calculating the safety distance using voxelization combined with the rated voltage level; constructing a dynamic three-dimensional work fence including restricted areas and buffer zones; verifying the identity information of the workers, the status of their protective equipment, and the electronic identification of their tools; generating a one-time dynamic authorization token by combining the action signature digest; before workers enter, jointly verifying the validity of the dynamic authorization token, the status of their protective equipment, the energized risk index, and the personnel's position coordinates; allowing entry only when all verifications pass; during the work process, using inertial measurement units and positioning signal fusion data to monitor personnel trajectories, while simultaneously monitoring the potential change trend of the work area, the status of protective equipment, and environmental parameters; and executing anomaly responses based on the monitoring results; after the work is completed, performing an exit review; calculating a behavior credibility score based on the data from the entire work process; and generating a hash chain digest of the score and work records and writing it into the audit ledger.

2. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, The potential risk assessment model comprehensively considers the electrical connection relationship between equipment nodes and the time change trend of state variables; when the calculated live risk index is less than the preset safety threshold, the work area is determined to be in a workable state; when the live risk index exceeds the preset safety threshold, subsequent operations are automatically blocked.

3. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, The steps for constructing a dynamic three-dimensional work fence include: converting the equipment surface into a spatial grid structure; calculating the minimum safe distance based on the rated voltage value, electric field strength coefficient, and structural compensation amount; defining the space within the minimum safe distance as a restricted area, and defining the area extending outward from the restricted area as a buffer zone; and expanding the spatial points along the outer direction according to the outer normal direction of the equipment surface to form the restricted area boundary and the buffer zone boundary.

4. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 3, characterized in that, During operation, when a change in the electrical status of the busbar, disconnector, or transformer is detected, the safety distance is recalculated and the spatial boundary is adjusted based on the updated equipment status to reconstruct the three-dimensional work fence; when the volume difference between the old and new fences exceeds the set threshold, a reconstruction verification prompt is issued.

5. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, The steps for generating a one-time dynamic authorization token include: collecting the acceleration, direction change, and duration of the action when the operator performs a standard action, and extracting the inertial feature vector as the action signature digest; encrypting the personnel number, task number, work fence number, authorization start and end time, tool feature digest, and action signature digest to generate a dynamic authorization token.

6. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, The specific criteria for joint verification are: the current time is within the valid time window of the dynamic authorization token and the token has not been revoked; the confidence level of the protective equipment identification is higher than the set lower limit; the live-line risk index is lower than the safety threshold; and the personnel location coordinates are located outside the buffer zone or outside the fence of the dynamic three-dimensional operation fence.

7. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, During the operation monitoring process, a buffer zone warning is triggered when a person's position deviates from the permitted area by more than the set deviation. When the rate of increase of the potential gradient exceeds the safety limit, the operation stop procedure is initiated and the operation area is locked; when the ambient humidity or wind speed exceeds the allowable range, the operation is suspended.

8. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 7, characterized in that, The abnormal response is divided into three levels: Level 1 is an alert, which issues an audible and visual warning; Level 2 is a control stop, which stops operation permissions and freezes the dynamic authorization token; Level 3 is an emergency lockout, which executes the area power cut-off and electronic access control lock.

9. The intelligent isolation and authorized control method for high-voltage operation areas in new energy power stations according to claim 1, characterized in that, The credibility score is calculated based on whether there are any violations or overstepping of boundaries in the operation process, whether the post-processing of abnormal responses complies with the specifications, whether the dynamic authorization token is used within the validity period, and whether the action signature is consistent with the original application. The hash chain digest uses a timestamp-based chain encryption mechanism.

10. A smart isolation and authorization control device for high-voltage operation areas in new energy power stations based on the method of any one of claims 1, characterized in that, include: The potential risk assessment unit connects to the transformer, disconnector, and busbar to collect real-time voltage and current signals, and calculates the potential risk index based on the topological connection relationship. The three-dimensional fence construction unit constructs a three-dimensional spatial model of the electrical equipment based on the equipment's geometric parameters and rated voltage level, and adjusts the spatial boundaries according to changes in electrical status; the identity and tool verification unit includes an identity recognition module, a protection detection module, and a tool verification module, used to verify personnel identity, protective equipment status, and tool list; the access control unit receives authorization tokens and location information, and verifies the validity of authorization, protection status, electrical potential safety, and location legality. The operation process monitoring unit includes a location monitoring module, a protection status verification module, a potential trend monitoring module, and an environmental monitoring module, used to collect the status of the entire operation process; the behavior auditing unit is used to calculate the behavior credibility score and generate a hash chain record after the operation is completed; the central processing control module is connected to the potential risk assessment unit, the three-dimensional fence construction unit, the identity and tool verification unit, the access control unit, the operation process monitoring unit, and the behavior auditing unit through a data bus.

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