Method, device and equipment for judging voltage loss of plant station, medium and program product

Abstract

The embodiment of the invention provides a plant station voltage loss judgment method, device and equipment, a medium and a program product, and particularly relates to the technical field of power grid intelligent monitoring and warning. The method comprises the steps that when a judgment period is reached, voltage loss state judgment is executed based on state identification information and / or voltage measurement data of all buses in a plant station, and initial voltage loss judgment results of all the buses are generated; when the initial voltage loss judgment results of two continuous judgment periods are inconsistent, triggering a bus topology state analysis process, and generating a topology state analysis result of each bus; determining a final voltage loss judgment result of each bus based on the initial voltage loss judgment result and the topological state analysis result; and based on the final voltage loss determination result of each bus, generating a final station voltage loss determination result. The method is used for achieving the effects of improving the voltage loss judgment accuracy and safety of the OCS system under the complex working condition, reducing false alarm and leakage alarm events and providing more reliable alarm data support for power grid dispatching.

Description

Technical Field

[0001] This application relates to the field of smart power grid monitoring and alarm technology, and in particular to a method, device, equipment, medium and program product for determining power plant undervoltage. Background Technology

[0002] In power grid dispatch automation systems, the Operation Monitoring System (OCS) plays a crucial role in real-time monitoring of power grid operation, timely detection of anomalies, and triggering alarms. Among these functions, substation-wide voltage loss determination is a key logic of OCS intelligent alarms. Its core objective is to quickly and accurately trigger alarm signals when a substation experiences a voltage loss due to an accident or maintenance, and to forward the results to higher-level dispatching agencies such as the central and central dispatch centers, providing critical data support for event handling, information dissemination, and impact statistics. In actual operation, substation voltage loss can be caused by various factors, such as abnormal bus voltage, equipment failure, or human error. However, existing technologies have several problems in the voltage loss determination process, such as false alarms caused by misoperation, missed alarms during maintenance, and misjudgments caused by telemetry data flicker. These problems not only interfere with dispatchers' monitoring work but may also mask true power grid anomalies, threatening power grid security. Summary of the Invention

[0003] This application provides a method, apparatus, equipment, medium, and program product for determining power plant undervoltage, in order to improve the accuracy and safety of undervoltage determination in the OCS system under complex operating conditions, reduce false alarms and missed alarms, and provide more reliable alarm data support for power grid dispatch.

[0004] In a first aspect, embodiments of this application provide a method for determining power plant pressure loss, including:

[0005] When the judgment period is reached, the undervoltage state judgment is performed based on the status identification information and / or voltage measurement data of each bus in the plant, and the preliminary undervoltage judgment results of each bus are generated.

[0006] When the preliminary underpressure determination results of two consecutive determination cycles are inconsistent, the bus topology status analysis process is triggered to generate the topology status analysis results of each bus.

[0007] Based on the preliminary underpressure determination results and the topology status analysis results, the final underpressure determination results for each busbar are determined.

[0008] Based on the final undervoltage determination results of each busbar, the final undervoltage determination result of the power plant is generated.

[0009] Secondly, embodiments of this application provide a plant pressure loss determination device, comprising:

[0010] The judgment module is used to perform undervoltage state judgment based on the status identification information and / or voltage measurement data of each bus in the plant when the judgment period is reached, and generate preliminary undervoltage judgment results for each bus.

[0011] The analysis module is used to trigger the bus topology status analysis process and generate the topology status analysis results for each bus when the preliminary undervoltage judgment results of two consecutive judgment cycles are inconsistent.

[0012] The determination module is used to determine the final undervoltage determination result for each busbar based on the preliminary undervoltage determination result and the topology status analysis result;

[0013] The generation module is used to generate the final substation undervoltage determination result based on the final undervoltage determination result of each bus.

[0014] Thirdly, embodiments of this application provide a power plant undervoltage determination device, including: a memory and a processor;

[0015] The memory stores computer-executed instructions;

[0016] The processor executes computer execution instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0017] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0018] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0019] The substation undervoltage determination method, device, equipment, medium, and program products provided in this application trigger a bus topology status analysis process when the preliminary undervoltage determination results for two consecutive cycles are inconsistent. This process verifies the bus connection relationship and power supply status based on the real-time power grid topology model and switch status data, resolving misjudgments caused by instantaneous data anomalies or equipment malfunctions. The final undervoltage determination result is based on dual verification of the preliminary determination and topology analysis. Through data-topology cross-verification, real undervoltage and instantaneous interference can be distinguished, improving the accuracy of the determination result. This solution improves the accuracy and safety of the OCS system's undervoltage determination under complex operating conditions through multi-stage, multi-source data fusion determination logic. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 Flowchart of the plant pressure loss determination method provided in this application Figure 1 ;

[0022] Figure 2 Flowchart of the plant pressure loss determination method provided in this application Figure 2 ;

[0023] Figure 3 A schematic diagram of the human-computer interaction interface of the Operation Monitoring System (OCS) provided in this application;

[0024] Figure 4 A flowchart of the plant pressure loss determination method provided in this application;

[0025] Figure 5 A schematic diagram of the plant underpressure detection device provided in this application;

[0026] Figure 6 This is a structural schematic diagram of the plant pressure loss detection device provided in this application.

[0027] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0028] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] The Operation Monitoring System (OCS) is used to quickly and accurately trigger alarm signals when the entire plant loses pressure due to an accident or maintenance, and forward the results to higher-level dispatching agencies such as the central dispatch and the main dispatch, providing key data support for incident handling, information dissemination and impact statistics.

[0030] During the maintenance of automated equipment at the plant or substation, or during a complete power outage for maintenance of the entire substation, in order to avoid accidentally triggering the station-wide power outage alarm signal, dispatchers and automation operators must perform a sign-hanging operation, specifically by hanging a "Station-wide Power Outage Maintenance Sign".

[0031] When maintenance is completed, power supply is initiated, or normal operation resumes, the undervoltage alarm function will be restored. At this time, the system continuously monitors whether the entire station meets the undervoltage judgment conditions by collecting real-time station operating data (such as voltage, current, switch status, etc.). If the undervoltage judgment conditions are met, an undervoltage alarm will be triggered, and the generated alarm signal will be sent to the central dispatch, main dispatch, and other higher-level dispatching agencies.

[0032] However, this solution has the following technical drawbacks:

[0033] 1. In the current scheme, dispatchers and automation operators share the authority to remove the "Power Outage Maintenance" sign, leading to a confusion of role permissions. In actual operation, false alarms due to plant / station pressure loss have occurred due to misoperation, posing an operational safety risk.

[0034] 2. Lack of a pre-judgment mechanism for voltage loss when removing test tags. In actual maintenance scenarios, it is necessary to manually confirm the energized status of the busbar, but the system does not provide any pre-judgment prompts, which leads to the immediate triggering of a station-wide voltage loss false alarm after the test tag is mistakenly removed, affecting the accuracy of the alarm.

[0035] 3. Dispatchers, by default, possess global remote control permissions, which can easily lead to busbar undervoltage risks due to accidental remote control. The current system only supports a "one-size-fits-all" start / stop of global remote control permissions, and cannot achieve fine-grained permission switching by plant, bay, or even individual equipment through visual operations such as "tag / tag removal". For example, when manually configuring remote control permissions before four-way remote commissioning, the lack of an automatic permission assignment function linked to maintenance status can easily lead to the problem of "permissions that should be enabled not being added". After commissioning, the permission revocation process relies on manual operation, often resulting in "permissions that have ended not being cancelled in time", creating a risk of permission residue. Because permission control cannot be refined to specific equipment or areas, dispatchers may cause unexpected undervoltage of non-target plants / buses due to accidental triggering of global permissions when performing remote control operations. For example, when remotely commissioning a bay, if global permissions are not isolated, bus switches of other plants may be accidentally operated, causing a substation-wide undervoltage event.

[0036] 4. The system lacks a delay processing mechanism for bus voltage measurement data. When a brief voltage flicker occurs (even if the data recovers in a very short time), it will still trigger a voltage loss alarm and send it to the higher-level dispatching agency, interfering with the dispatcher's monitoring and causing false alarm events.

[0037] 5. Current technology relies solely on voltage telemetry data for voltage loss determination, without considering bus topology status information. When the topology is normal but the voltage measurement is abnormal, it will incorrectly determine that the entire station is experiencing voltage loss and trigger an alarm.

[0038] 6. When some busbars within the plant are listed for maintenance, the system still includes them in the overall station undervoltage statistics (treating them as normal busbars). When other operating busbars experience overall station undervoltage, the system cannot correctly trigger the overall station undervoltage alarm because the busbar under maintenance is not excluded, resulting in the risk of missed alarms.

[0039] Therefore, this application provides a method for determining plant pressure loss, specifically including the following technical innovations:

[0040] Operational role permission isolation mechanism: By separating the operational permissions of dispatchers and automation operators, and by attaching and removing different "station-wide power outage maintenance signs", the risk of false alarms caused by overlapping permissions is avoided.

[0041] Test tag removal prediction and protection mechanism: Before removing the test tag, the system automatically performs a pressure loss prediction analysis. If it is predicted that removing the tag may trigger a pressure loss alarm, the system will force the operator to confirm whether to remove the tag, effectively preventing false alarms caused by accidental tag removal.

[0042] Fine-grained remote control access control: This feature dynamically grants remote control permissions to operators based on the status of the test tag. During remote control commissioning, remote control access can only be granted after a dedicated test tag is displayed on the target plant, bay, or equipment, preventing the risk of station-wide power loss due to accidental remote control.

[0043] Telemetry flicker delay suppression: Delay processing logic is introduced to filter transient voltage flicker using a time window. Delayed observation effectively avoids false alarms caused by measurement noise.

[0044] Topology-Voltage Fusion Judgment: Constructing a joint criterion for bus topology status and voltage data. By analyzing topology information such as bus connection relationships and switch status, and combining it with voltage measurement data, a comprehensive judgment on the undervoltage status is made, resolving the problem of misjudgment when the topology is normal but the voltage is abnormal.

[0045] Dynamic exclusion of buses under maintenance: In the station-wide undervoltage statistics logic, buses with status tags such as "under maintenance," "testing," and "cold standby" are automatically identified and excluded. This ensures that undervoltage assessment is performed only on operating buses, avoiding the risk of missed alarms due to under-maintenance buses being included in the statistics.

[0046] The above improvements, through the synergistic effect of multi-dimensional protection mechanisms, significantly enhance the accuracy, reliability, and operational safety of OCS undervoltage alarms, providing more accurate undervoltage judgment support for power grid dispatch.

[0047] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0048] Figure 1 Flowchart of the plant pressure loss determination method provided in this application Figure 1 ,like Figure 1 As shown, the method includes:

[0049] S101. When the judgment period is reached, based on the status identification information and / or voltage measurement data of each bus in the plant, the undervoltage status judgment is performed, and the preliminary undervoltage judgment results of each bus are generated.

[0050] When the preset judgment period arrives, the status identification information (such as operation / maintenance / fault status) and voltage measurement data of each bus in the plant are acquired. The bus voltage level and status identification are comprehensively analyzed by the preset undervoltage judgment algorithm to generate the preliminary undervoltage judgment result of each bus.

[0051] S102. When the preliminary undervoltage judgment results of two consecutive judgment cycles are inconsistent, the bus topology status analysis process is triggered to generate the topology status analysis results of each bus.

[0052] When there is a discrepancy between the preliminary undervoltage determination results of two consecutive determination cycles, the bus topology status analysis process is triggered. This process verifies bus connection relationships and power supply status based on the real-time power grid topology model and switch status data, generating topology status analysis results for each bus. This mechanism resolves ambiguities caused by instantaneous data interference and equipment malfunctions through topology logic verification, improving the reliability of the determination results.

[0053] S103. Based on the preliminary undervoltage determination results and the topology status analysis results, determine the final undervoltage determination results for each busbar.

[0054] In this step, the preliminary undervoltage determination results are cross-validated with the topology status analysis results. The final undervoltage determination results for each bus are determined through a preset determination logic (such as data-topology dual confirmation). This step, through a closed-loop verification mechanism of "preliminary results-topology verification," distinguishes between real undervoltage and transient interference, avoiding misjudgments or omissions caused by single-source data.

[0055] S104. Based on the final undervoltage determination results of each busbar, generate the final undervoltage determination results for the power plant.

[0056] This step generates a substation-level undervoltage determination conclusion based on the final undervoltage assessment results for each busbar. Through comprehensive analysis of the busbar-level results, it distinguishes between partial and total substation undervoltage scenarios.

[0057] The substation undervoltage determination method provided in this application triggers a bus topology status analysis process when the preliminary undervoltage determination results for two consecutive cycles are inconsistent. This process verifies bus connection relationships and power supply status based on a real-time power grid topology model and switch status data, resolving misjudgments caused by instantaneous data anomalies or equipment malfunctions. The final undervoltage determination result is based on dual verification of the preliminary determination and topology analysis. Through data-topology cross-verification, real undervoltage and instantaneous interference can be distinguished, improving the accuracy of the determination results. This solution improves the accuracy and safety of undervoltage determination in complex operating conditions through multi-stage, multi-source data fusion determination logic.

[0058] Figure 2 Flowchart of the plant pressure loss determination method provided in this application Figure 2 ,like Figure 2 As shown, in this embodiment... Figure 1 Based on the examples, the method for determining plant pressure loss is described in detail. This method includes:

[0059] S201. When the judgment period is reached, based on the status identification information and / or voltage measurement data of each bus in the plant, the undervoltage status judgment is performed, and the preliminary undervoltage judgment results of each bus are generated.

[0060] In one possible implementation, when the determination period is reached, based on the status identification information and / or voltage measurement data of each busbar in the substation, a voltage undervoltage determination is performed to generate preliminary voltage undervoltage determination results for each busbar. Specifically, this may include the following steps:

[0061] When the judgment period is reached, for any busbar in the plant, if the status identification information of the busbar indicates that the busbar is in a preset non-operational state, the preliminary undervoltage judgment result of the busbar is determined to be a non-undervoltage state.

[0062] If the status identification information of the bus indicates that the bus is not in the preset non-operating state and there is no effective voltage measurement data for the bus, then the preliminary undervoltage judgment result of the bus is determined to be a non-undervoltage state.

[0063] If the status identification information of the bus indicates that the bus is not in the preset non-operation state, and the bus has effective voltage measurement data, then it is detected whether any voltage value in the effective voltage measurement data exceeds the preset proportion of its rated value.

[0064] If a voltage value exceeding a preset percentage of its rated value is detected, the preliminary undervoltage determination result of the busbar is determined to be a non-undervoltage state; otherwise, the preliminary undervoltage determination result of the busbar is determined to be an undervoltage state.

[0065] In this embodiment, when the judgment period is reached, a voltage undervoltage judgment is performed based on the status identification information and voltage measurement data of each busbar in the substation, generating a preliminary voltage undervoltage judgment result for each busbar. Specifically, this includes the following progressive technical processing logic:

[0066] For any busbar, if its status identification information indicates that it is in a preset non-operational state (such as maintenance state, testing state, or standby state), then the busbar is directly determined to be in a non-undervoltage state.

[0067] If the bus status indicator shows "operating" but there is no valid voltage measurement data, it is determined to be in a non-undervoltage state.

[0068] For buses with an operating status and valid voltage measurement data, the voltage value is further checked to see if it exceeds a preset percentage of the rated value (e.g., 30% of the rated voltage). If any voltage value exceeds the threshold, it is determined to be in a non-undervoltage state; otherwise, it is determined to be in an undervoltage state.

[0069] This solution establishes a precise screening mechanism for bus undervoltage conditions through a three-level judgment logic: "status identifier priority - data validity verification - voltage threshold comparison." This mechanism improves the accuracy of judgment under complex operating conditions.

[0070] In one possible implementation, before performing a voltage undervoltage determination based on the status identification information and / or voltage measurement data of each busbar in the substation and generating preliminary voltage undervoltage determination results for each busbar when the determination period is reached, the substation voltage undervoltage determination method provided in this application may further include the following steps:

[0071] When both the first and second side roles activate the underpressure determination function for the target plant, the underpressure determination function of the target plant will be activated so that the plant underpressure determination process will be executed when the determination cycle is reached.

[0072] The first-side role only has access to the first-side functional modules, and the second-side role only has access to the second-side functional modules.

[0073] In this implementation, a first-side role (such as a dispatcher) and a second-side role (such as an automation operator) are configured to correspond to independent functional modules. The undervoltage determination function of the target substation is only marked as "activated" when both roles perform the activation operation on the target substation, and the substation undervoltage determination process is triggered when the subsequent determination cycle arrives. This design, through "dual confirmation" logic, ensures that the activation of the undervoltage determination function complies with the control requirements of "mutually exclusive operation and separation of permissions" in power grid safety regulations, avoiding accidental triggering of the function due to unilateral misoperation.

[0074] The first-side role only has the right to operate the first-side functional modules, and the second-side role only has the right to operate the second-side functional modules. Furthermore, it is prohibited to operate the functional cards within the other role's permission range (e.g., the automation duty officer cannot remove the card of the dispatcher role, and vice versa), thus achieving hard isolation of operation permissions between roles.

[0075] Reference Figure 3 The diagram shown is a human-computer interaction interface of the Operation Monitoring System (OCS) provided in this application. When the automated duty officer attempts to remove the dispatcher's role card, the operation is directly blocked and a "insufficient permissions" prompt message is returned to ensure the strictness of permission control.

[0076] S202. When the preliminary undervoltage judgment results of two consecutive judgment cycles are inconsistent, the bus topology status analysis process is triggered to generate the topology status analysis results of each bus.

[0077] S203. Based on the preliminary undervoltage determination results and topology state analysis results, determine the final undervoltage determination results for each busbar.

[0078] In one possible implementation, the final undervoltage determination result for each busbar is determined based on the preliminary undervoltage assessment result and the topology status analysis result. This may specifically include the following steps:

[0079] For any busbar,

[0080] If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is in an undervoltage state, and the topology state analysis result determines that the bus is in a non-undervoltage state, then the final undervoltage determination result of the bus is determined to be a non-undervoltage state.

[0081] If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is undervoltage, the topology status analysis result determines that the bus is undervoltage, and the topology analysis function can be triggered normally, then the secondary bus topology status analysis process is executed. If the secondary topology status analysis result still determines that the bus is undervoltage, then the final undervoltage determination result of the bus is determined to be undervoltage.

[0082] In this embodiment, for any busbar, if the initial undervoltage determination result for at least one determination period is "undervoltage state," but the topology state analysis result is "non-undervoltage state," then the final state of the busbar is determined to be "non-undervoltage state." This design effectively solves the problem of misjudgment of "false undervoltage" caused by instantaneous voltage fluctuations, measurement errors, or local interference by correcting the initial undervoltage determination result through topology state analysis results.

[0083] When both the initial undervoltage determination result and the topology status analysis result indicate an "undervoltage state," and the topology analysis function can be triggered normally, the secondary bus topology status analysis process is initiated. If the secondary topology status analysis result still indicates an "undervoltage state," then the bus is ultimately determined to be in an undervoltage state. This mechanism, through a "dual topology verification" design, effectively eliminates the risk of misjudgment caused by accidental errors or local data interference from a single topology analysis.

[0084] S204. If at least one busbar in the substation has a final undervoltage determination result of non-undervoltage state or the substation is in a preset non-operation state, then the preliminary undervoltage determination result of the substation shall be determined as non-undervoltage state.

[0085] In this step, if the final undervoltage determination result of any busbar in the plant is a non-undervoltage state, or if the plant as a whole is in a preset non-operational state (such as maintenance / standby state), then the plant is directly determined to be in a non-undervoltage state.

[0086] S205. If the final undervoltage determination results of all busbars in the substation indicate that they are in an undervoltage state, then the preliminary undervoltage determination result of the substation shall be determined as an undervoltage state, and the timer shall be started.

[0087] The preliminary substation undervoltage determination result is determined to be undervoltage only if the final undervoltage determination result of all busbars within the substation (excluding non-operating busbars) is undervoltage, and a timer is triggered. This step, through the strict condition setting of "all busbars undervoltage," ensures the rigor of the substation undervoltage determination and avoids missed determinations due to misjudgment of a single busbar or interference from non-operating busbars.

[0088] S206. When the timing duration reaches the preset duration threshold, execute the secondary power plant undervoltage determination process.

[0089] Once the plant is initially determined to be in a state of pressure loss, a timer is started (e.g., 5 minutes) to verify the continuity of the pressure loss state through the time dimension, and to rule out misjudgments caused by instantaneous faults or measurement fluctuations.

[0090] S207. If the secondary power plant pressure loss determination result still determines that the power plant is in a pressure loss state, then the final power plant pressure loss determination result is determined to be a pressure loss state.

[0091] S208. If the secondary power plant pressure loss determination result determines that the power plant is in a non-pressure loss state, then the final power plant pressure loss determination result is determined to be a non-pressure loss state.

[0092] After the timing ends, a secondary substation undervoltage determination process is triggered. If the result is still undervoltage, the substation is ultimately determined to be undervoltage; if the result is not undervoltage, it is corrected to be undervoltage. This mechanism, through a closed-loop design of "double determination + time verification," effectively distinguishes between real undervoltage and transient interference, improving the reliability of the determination results.

[0093] Reference Figure 4 The diagram shows a flowchart of the substation undervoltage determination method provided in this application. The specific determination process is as follows: Within the determination period, the OCS system first performs an initial substation undervoltage determination preset for the target substation. It iterates through all buses within the substation, assuming all buses are undervoltage. For any bus, if the bus is excluded or in a preset non-operating state, it is directly determined that the bus is not undervoltage, skipping subsequent voltage detection; if the bus has no valid voltage measurement data (no measurement point), it is determined to be in a non-undervoltage state; if valid voltage measurement data exists and the voltage value exceeds the rated value by 30%, the bus is determined to be in a non-undervoltage state. When the bus undervoltage determination results of two consecutive determination periods are inconsistent, the undervoltage determination cache initialization is triggered, the abnormal start time is recorded, and the bus topology status analysis process is started. If the bus topology status analysis result indicates a non-undervoltage state while the initial undervoltage determination result is undervoltage, the result is corrected to a non-undervoltage state to avoid misjudgment due to instantaneous voltage fluctuations. If the topology status analysis result indicates an undervoltage state and the topology analysis function can be triggered normally, the secondary bus topology status analysis process is executed. If the secondary topology status analysis result is still undervoltage, the undervoltage of that bus is finally confirmed. After completing the determination of all buses, the substation-level comprehensive determination is executed. If the substation is excluded or in a preset non-operating state, or any bus is determined to be in a non-undervoltage state, the substation is directly determined to be in a non-undervoltage state. If and only if all buses (excluding non-operating states) are determined to be undervoltage, the substation is initially determined to be undervoltage, and a timer is started. After the delay, the secondary substation undervoltage determination process is triggered. If the result is still undervoltage, the substation undervoltage is finally confirmed; if the result is non-undervoltage, the determination result is corrected. This mechanism can quickly screen anomalies through status indicators and voltage thresholds, and eliminate transient interference through topology analysis and delay verification, ultimately achieving a significant improvement in the accuracy of the whole station undervoltage determination and effectively reducing false alarms and missed alarms.

[0094] In one possible implementation, the plant pressure loss determination method provided in this application may further include the following steps:

[0095] When the first or second side role object performs the undervoltage judgment function activation operation for the target plant, the plant undervoltage pre-inspection process is triggered and a pre-judgment result is generated. The plant undervoltage pre-inspection process is used to evaluate whether the target plant meets the preset undervoltage alarm conditions after the function is activated.

[0096] If the prediction result indicates that the preset pressure loss alarm conditions are met, then risk warning information and secondary confirmation instructions will be output through the human-machine interface. The risk warning information is used to prompt the operator to trigger the plant pressure loss alarm after the operation, and the secondary confirmation instructions are used to instruct the operator to verify the operation intention and then perform the confirmation operation.

[0097] In this implementation, when a first-side or second-side role performs the activation operation of the target substation undervoltage judgment function, a substation undervoltage pre-inspection process is triggered. This process simulates the substation state after function activation based on real-time status indicators, voltage measurement data, and topology status information, and assesses whether the preset undervoltage alarm conditions are met. If the undervoltage alarm conditions are met, a risk warning message is output through the human-machine interface, such as prompting the operator that "function activation will trigger a substation undervoltage alarm." Additionally, a secondary confirmation command can be output to require the operator to verify the operation intent before performing the confirmation operation, avoiding false alarms caused by misoperation. For example, when a dispatcher attempts to remove the "Full Substation Power Outage Maintenance" sign, the system displays a prompt box stating, "Removing the sign will trigger an undervoltage alarm; please confirm the operation intent."

[0098] In one possible implementation, the plant pressure loss determination method provided in this application may further include the following steps:

[0099] In response to configuring a temporary permission identifier to a target role object, control permissions corresponding to the level of the temporary permission identifier are assigned to the target role object. The level includes at least one of device level, bay level, and plant level, and the control permissions include remote control permissions.

[0100] In this implementation, in response to a temporary permission identifier configuration command, control permissions (such as remote control permissions) at the device level, bay level, or plant level are granted to the target role object. Temporary control permissions are granted to the role object by configuring a temporary permission identifier. For example, when an automation operator attempts to remotely test feeder bay 716 of the XXX substation without a dedicated acceptance test tag, they are prompted that they lack control permissions for the relevant equipment. After the test tag is attached to bay 716, remote control can proceed normally.

[0101] The substation undervoltage determination method provided in this application triggers a bus topology status analysis process when the preliminary undervoltage determination results for two consecutive cycles are inconsistent. This process verifies bus connection relationships and power supply status based on a real-time power grid topology model and switch status data, resolving misjudgments caused by instantaneous data anomalies or equipment malfunctions. The final undervoltage determination result is based on dual verification of the preliminary determination and topology analysis. Through data-topology cross-verification, real undervoltage and instantaneous interference can be distinguished, improving the accuracy of the determination results. This solution improves the accuracy and safety of undervoltage determination in complex operating conditions through multi-stage, multi-source data fusion determination logic.

[0102] Figure 5 This is a schematic diagram of the plant underpressure detection device provided in this application, as shown below. Figure 5 As shown, the plant pressure loss determination device 50 provided in this embodiment includes:

[0103] The judgment module 501 is used to perform undervoltage state judgment based on the status identification information and / or voltage measurement data of each bus in the plant when the judgment cycle is reached, and generate preliminary undervoltage judgment results for each bus.

[0104] Analysis module 502 is used to trigger the bus topology status analysis process and generate the topology status analysis results of each bus when the preliminary undervoltage judgment results of two consecutive judgment cycles are inconsistent.

[0105] The determination module 503 is used to determine the final undervoltage determination result of each bus based on the preliminary undervoltage determination result and the topology status analysis result;

[0106] The generation module 504 is used to generate the final substation undervoltage determination result based on the final undervoltage determination result of each bus.

[0107] In one possible implementation, the module is specifically used for:

[0108] For any busbar,

[0109] If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is in an undervoltage state, and the topology state analysis result determines that the bus is in a non-undervoltage state, then the final undervoltage determination result of the bus is determined to be a non-undervoltage state.

[0110] If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is undervoltage, the topology status analysis result determines that the bus is undervoltage, and the topology analysis function can be triggered normally, then the secondary bus topology status analysis process is executed. If the secondary topology status analysis result still determines that the bus is undervoltage, then the final undervoltage determination result of the bus is determined to be undervoltage.

[0111] In one possible implementation, the generation module is specifically used for:

[0112] If at least one busbar in the substation has a final undervoltage determination result of non-undervoltage state or the substation is in a preset non-operation state, then the preliminary undervoltage determination result of the substation is determined to be non-undervoltage state.

[0113] If the final undervoltage determination results of all busbars in the plant indicate that they are in an undervoltage state, then the preliminary undervoltage determination result of the plant is determined to be an undervoltage state, and the timer is started.

[0114] When the timing duration reaches the preset duration threshold, the secondary power plant undervoltage determination process is executed;

[0115] If the secondary power plant pressure loss determination result still determines that the power plant is in a pressure loss state, then the final power plant pressure loss determination result is determined to be a pressure loss state.

[0116] If the secondary power plant pressure loss assessment result determines that the power plant is in a non-pressure loss state, then the final power plant pressure loss assessment result is determined to be a non-pressure loss state.

[0117] In one possible implementation, the determination module is specifically used for:

[0118] When the judgment period is reached, for any busbar in the plant, if the status identification information of the busbar indicates that the busbar is in a preset non-operational state, the preliminary undervoltage judgment result of the busbar is determined to be a non-undervoltage state.

[0119] If the status identification information of the bus indicates that the bus is not in the preset non-operating state and there is no effective voltage measurement data for the bus, then the preliminary undervoltage judgment result of the bus is determined to be a non-undervoltage state.

[0120] If the status identification information of the bus indicates that the bus is not in the preset non-operation state, and the bus has effective voltage measurement data, then it is detected whether any voltage value in the effective voltage measurement data exceeds the preset proportion of its rated value.

[0121] If a voltage value exceeding a preset percentage of its rated value is detected, the preliminary undervoltage determination result of the busbar is determined to be a non-undervoltage state; otherwise, the preliminary undervoltage determination result of the busbar is determined to be an undervoltage state.

[0122] In one possible implementation, the plant underpressure determination device provided in this application is further used for:

[0123] When both the first and second side roles activate the underpressure determination function for the target plant, the underpressure determination function of the target plant will be activated so that the plant underpressure determination process will be executed when the determination cycle is reached.

[0124] The first-side role only has access to the first-side functional modules, and the second-side role only has access to the second-side functional modules.

[0125] In one possible implementation, the plant underpressure determination device provided in this application is further used for:

[0126] When the first or second side role object performs the undervoltage judgment function activation operation for the target plant, the plant undervoltage pre-inspection process is triggered and a pre-judgment result is generated. The plant undervoltage pre-inspection process is used to evaluate whether the target plant meets the preset undervoltage alarm conditions after the function is activated.

[0127] If the prediction result indicates that the preset pressure loss alarm conditions are met, then risk warning information and secondary confirmation instructions will be output through the human-machine interface. The risk warning information is used to prompt the operator to trigger the plant pressure loss alarm after the operation, and the secondary confirmation instructions are used to instruct the operator to verify the operation intention and then perform the confirmation operation.

[0128] In one possible implementation, the plant underpressure determination device provided in this application is further used for:

[0129] In response to configuring a temporary permission identifier to a target role object, control permissions at the level corresponding to the temporary permission identifier are assigned to the target role object. The level includes at least one of device level, bay level, and plant level, and the control permissions include remote control permissions.

[0130] The plant pressure loss determination device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0131] Figure 6 This is a structural schematic diagram of the plant pressure loss detection equipment provided in this application. Figure 6 As shown, the power plant undervoltage determination device 60 provided in this embodiment includes at least one processor 601 and a memory 602. Optionally, the device 60 further includes a communication component 603. The processor 601, memory 602, and communication component 603 are connected via a bus.

[0132] In a specific implementation, at least one processor 601 executes computer execution instructions stored in memory 602, causing at least one processor 601 to perform the above-described method.

[0133] The specific implementation process of processor 601 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0134] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0135] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0136] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0137] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0138] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0139] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0140] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0141] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0142] 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 network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0143] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0144] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0145] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0146] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for determining plant / station pressure loss, characterized in that, include: When the judgment period is reached, the undervoltage state judgment is performed based on the status identification information and / or voltage measurement data of each bus in the plant, and the preliminary undervoltage judgment results of each bus are generated. When the preliminary underpressure determination results of two consecutive determination cycles are inconsistent, the bus topology status analysis process is triggered to generate the topology status analysis results of each bus. Based on the preliminary underpressure determination results and the topology status analysis results, the final underpressure determination results for each busbar are determined. Based on the final undervoltage determination results of each busbar, the final undervoltage determination result of the power plant is generated.

2. The method according to claim 1, characterized in that, The determination of the final undervoltage assessment results for each busbar based on the preliminary undervoltage assessment results and topology state analysis results includes: For any busbar, If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is in an undervoltage state, and the topology state analysis result determines that the bus is in a non-undervoltage state, then the final undervoltage determination result of the bus is determined to be a non-undervoltage state. If the preliminary undervoltage determination result of at least one determination cycle determines that the bus is undervoltage, the topology status analysis result determines that the bus is undervoltage, and the topology analysis function can be triggered normally, then the secondary bus topology status analysis process is executed. If the secondary topology status analysis result still determines that the bus is undervoltage, then the final undervoltage determination result of the bus is determined to be undervoltage.

3. The method according to claim 1, characterized in that, The final power plant undervoltage determination result is generated based on the final undervoltage determination results of each busbar, including: If at least one busbar in the substation has a final undervoltage determination result of non-undervoltage state or the substation is in a preset non-operation state, then the preliminary undervoltage determination result of the substation is determined to be non-undervoltage state. If the final undervoltage determination results of each busbar in the plant indicate that it is in an undervoltage state, then the preliminary undervoltage determination result of the plant is determined to be an undervoltage state, and the timer is started. When the timing duration reaches the preset duration threshold, the secondary power plant undervoltage determination process is executed; If the secondary power plant pressure loss determination result still determines that the power plant is in a pressure loss state, then the final power plant pressure loss determination result is determined to be a pressure loss state. If the secondary power plant pressure loss assessment result determines that the power plant is in a non-pressure loss state, then the final power plant pressure loss assessment result is determined to be a non-pressure loss state.

4. The method according to claim 1, characterized in that, When the judgment period is reached, based on the status identification information and / or voltage measurement data of each busbar in the substation, a voltage loss state judgment is performed, and preliminary voltage loss judgment results for each busbar are generated, including: When the judgment period is reached, for any busbar in the plant, if the status identification information of the busbar indicates that the busbar is in a preset non-operational state, the preliminary undervoltage judgment result of the busbar is determined to be a non-undervoltage state. If the status identification information of the bus indicates that the bus is not in the preset non-operating state and there is no effective voltage measurement data for the bus, then the preliminary undervoltage judgment result of the bus is determined to be a non-undervoltage state. If the status identification information of the bus indicates that the bus is not in a preset non-operating state, and the bus has effective voltage measurement data, then it is detected whether any voltage value in the effective voltage measurement data exceeds a preset proportion of its rated value. If a voltage value exceeding a preset percentage of its rated value is detected, the preliminary undervoltage determination result of the busbar is determined to be a non-undervoltage state; otherwise, the preliminary undervoltage determination result of the busbar is determined to be an undervoltage state.

5. The method according to any one of claims 1-4, characterized in that, Before performing a voltage undervoltage determination based on the status identification information and / or voltage measurement data of each busbar in the substation when the determination period is reached, and generating preliminary voltage undervoltage determination results for each busbar, the method further includes: When both the first-side and second-side roles activate the underpressure determination function for the target plant, the underpressure determination function of the target plant is activated so that the plant underpressure determination process is executed when the determination cycle is reached. The first-side role only has access to the first-side functional modules, and the second-side role only has access to the second-side functional modules.

6. The method according to any one of claims 1-4, characterized in that, The method further includes: When the first or second side role object performs the undervoltage judgment function activation operation for the target plant, the plant undervoltage pre-inspection process is triggered and a pre-judgment result is generated. The plant undervoltage pre-inspection process is used to evaluate whether the target plant meets the preset undervoltage alarm conditions after the function is activated. If the prediction result indicates that the preset pressure loss alarm condition is met, then risk warning information and secondary confirmation instructions are output through the human-machine interface. The risk warning information is used to prompt the operator to trigger the plant pressure loss alarm after the operation, and the secondary confirmation instructions are used to instruct the operator to verify the operation intention and then perform the confirmation operation.

7. The method according to any one of claims 1-4, characterized in that, The method further includes: In response to configuring a temporary permission identifier to a target role object, control permissions corresponding to the level of the temporary permission identifier are assigned to the target role object. The level includes at least one of device level, interval level, and plant level, and the control permissions include remote control permissions.

8. A plant / station pressure loss determination device, characterized in that, include: The judgment module is used to perform undervoltage state judgment based on the status identification information and / or voltage measurement data of each bus in the plant when the judgment period is reached, and generate preliminary undervoltage judgment results for each bus. The analysis module is used to trigger the bus topology status analysis process and generate the topology status analysis results for each bus when the preliminary undervoltage judgment results of two consecutive judgment cycles are inconsistent. The determination module is used to determine the final undervoltage determination result for each busbar based on the preliminary undervoltage determination result and the topology status analysis result; The generation module is used to generate the final substation undervoltage determination result based on the final undervoltage determination result of each bus.

9. A plant / station pressure loss detection device, characterized in that, include: Memory, processor; The memory stores instructions that the computer executes; The processor executes computer execution instructions stored in memory, causing the processor to perform the method as claimed in any one of claims 1-7.

10. A computer-readable storage medium or computer program product, characterized in that, A computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as claimed in any one of claims 1-7; or, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1-7.

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