A method and apparatus for monitoring equipment condition

Abstract

This application discloses a device for monitoring device status. This application can obtain preset power supply circuit configuration information corresponding to the monitored device; through current acquisition terminals associated with each power supply circuit in the monitored device, multiple phase current vectors are simultaneously acquired, and transmission channel information corresponding to each phase current vector is obtained; based on the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, at least one power supply circuit set is obtained; for each power supply circuit set, the phase current vectors of each power supply circuit in the power supply circuit set are vector-superimposed to obtain a total current vector; when the amplitude of the total current vector corresponding to any power supply circuit set exceeds a preset current threshold range, it is determined that the monitored device is in an abnormal state. Therefore, this application effectively improves the accuracy and reliability of device status monitoring in multi-circuit power supply scenarios.

Description

Technical Field

[0001] This application relates to the field of power monitoring technology, specifically to a method and apparatus for monitoring equipment status. Background Technology

[0002] In industrial power systems, to ensure the continuous operation of critical power-consuming units (such as server racks, water pumps, fans, and power distribution devices with dual power inputs), a dual-power or multi-circuit redundant power supply architecture is often adopted. This means that two or more independent power supply circuits jointly provide power to the same power-consuming unit. While this design improves power supply reliability, it also means that the overall electrical state cannot be accurately reflected by the current characteristics of any single circuit.

[0003] However, traditional condition monitoring methods typically only determine the current threshold for each power supply circuit independently, lacking the overall perception of the coordinated power supply relationship of multiple circuits. When a power unit experiences local insulation degradation, poor contact, or asymmetrical faults, the abnormal current may be distributed across multiple circuits, or even partially canceled out due to phase differences, causing the current in a single circuit to not exceed the alarm threshold, thus leading to missed alarms and making it difficult to detect potential risks in a timely manner. Summary of the Invention

[0004] This application provides a device for monitoring device status, which can effectively improve the accuracy and reliability of device status monitoring in multi-circuit power supply scenarios.

[0005] This application provides a device status monitoring method, the method including:

[0006] Obtain the preset power supply circuit configuration information corresponding to the monitored device. The preset power supply circuit configuration information includes the association between the circuit information of each power supply circuit in the monitored device and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit.

[0007] Multiple phase current vectors are simultaneously acquired through the current acquisition terminals associated with each power supply circuit in the monitored equipment, and the transmission channel information corresponding to each phase current vector is obtained.

[0008] Based on the transmission channel information of each phase current vector and the matching relationship between the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, the power supply circuits in the monitored equipment are grouped to obtain at least one power supply circuit set. The circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier.

[0009] For each set of power supply circuits, the phase current vectors of each power supply circuit in the set are vector-superimposed to obtain the total current vector corresponding to the set of power supply circuits.

[0010] When the magnitude of the total current vector corresponding to any set of power supply circuits exceeds the preset current threshold range, the monitored device is determined to be in an abnormal state.

[0011] This application embodiment also provides a device for monitoring device status, the device comprising:

[0012] The information acquisition unit is used to acquire the preset power supply circuit configuration information corresponding to the monitored device. The preset power supply circuit configuration information includes the association between the circuit information of each power supply circuit in the monitored device and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit.

[0013] The acquisition unit is used to synchronously acquire multiple phase current vectors through the current acquisition terminals associated with each power supply circuit in the monitored equipment, and obtain the transmission channel information corresponding to each phase current vector;

[0014] The grouping unit is used to group the power supply circuits in the monitored equipment based on the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, so as to obtain at least one power supply circuit set. The circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier.

[0015] The vector superposition unit is used to perform vector superposition of the phase current vectors of each power supply circuit in each power supply circuit set to obtain the total current vector corresponding to the power supply circuit set.

[0016] The status determination unit is used to determine that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any set of power supply circuits exceeds the preset current threshold range.

[0017] This application also provides an electronic device, including a processor and a memory, wherein the memory stores multiple instructions; the processor loads instructions from the memory to execute the steps in any of the device status monitoring methods provided in this application.

[0018] This application also provides a computer-readable storage medium storing multiple instructions adapted for loading by a processor to execute steps in any of the device status monitoring methods provided in this application.

[0019] This application also provides a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps in any of the device status monitoring methods provided in this application.

[0020] In this application, multiple phase current vectors can be simultaneously acquired through current acquisition terminals associated with each power supply circuit in the monitored device. Since each phase current vector is acquired and transmitted by its corresponding current acquisition terminal, the transmission channel information corresponding to each phase current vector can be directly obtained. Furthermore, because the obtained preset power supply circuit configuration information for the monitored device includes the association between the circuit information of each power supply circuit and the corresponding load identifier, and the circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit, the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in the circuit information of each circuit in the preset power supply circuit configuration information can be established. The system groups the power supply circuits in the monitored equipment to obtain at least one power supply circuit set. The circuit information of each power supply circuit in each set corresponds to the same load identifier. Then, for each power supply circuit set, the phase current vectors of each power supply circuit in the set are vector-superimposed to obtain the total current vector corresponding to the power supply circuit set. This total current vector accurately reflects the combined input current of multiple power supply circuits under the same load, effectively capturing fault characteristics masked in single-circuit monitoring due to abnormal current dispersion or phase cancellation. Thus, when the amplitude of the total current vector corresponding to any power supply circuit set exceeds a preset current threshold range, it can be determined that the monitored equipment is in an abnormal state. This effectively improves the accuracy and reliability of equipment status monitoring in multi-circuit power supply scenarios. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating the device status monitoring method provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram of the equipment status monitoring device provided in the embodiments of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] This application provides a method and apparatus for monitoring equipment status.

[0026] One type of equipment status monitoring device can be integrated into an electronic device, such as a terminal or server. The terminal can be a mobile phone, tablet computer, smart Bluetooth device, laptop computer, or personal computer (PC); the server can be a single server or a server cluster composed of multiple servers.

[0027] In some embodiments, the device status monitoring device can also be integrated into multiple electronic devices. For example, the device status monitoring device can be integrated into multiple servers, and the device status monitoring method of this application can be implemented by multiple servers.

[0028] In some embodiments, the server may also be implemented as a terminal.

[0029] The following sections provide detailed descriptions of each example. It should be noted that the sequence numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

[0030] In this embodiment, a device status monitoring method is provided, such as... Figure 1 This method, which can be applied to the monitored device itself or a server connected to it, can be described as follows:

[0031] The monitored equipment refers to a power-consuming unit with a multi-circuit redundant power supply structure, which is powered by two or more independent power supply circuits, such as server racks, water pumps, fans, and power distribution devices with dual power inputs; the equipment has a main control unit deployed inside or locally, which can receive data from the current acquisition terminals associated with each power supply circuit and execute equipment status monitoring methods.

[0032] A server is a remote computing device that is connected to the monitored device via a wired or wireless communication network. It is used to centrally receive current data and configuration information uploaded by multiple monitored devices and execute the device status monitoring method remotely to achieve centralized monitoring and alarm management.

[0033] 101. Obtain the preset power supply circuit configuration information corresponding to the monitored equipment. The preset power supply circuit configuration information includes the association between the circuit information of each power supply circuit in the monitored equipment and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit.

[0034] The preset power supply circuit configuration information refers to pre-established and stored structured data used to describe the logical relationship between each power supply circuit within the monitored equipment and the load it serves. This configuration information can be generated during system deployment through manual input, topology scanning, or automatic discovery, and supports subsequent dynamic updates and integrity verification.

[0035] The power supply circuit is used to supply power to the corresponding load, and each load is powered by one or more power supply circuits.

[0036] Circuit information refers to the set of metadata used to uniquely identify and describe the corresponding power supply circuit. It includes at least the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit, and may also include auxiliary information such as circuit identifier, polarity reversal identifier, and rated parameters.

[0037] A load identifier is a logical tag used to uniquely identify an electrical load (i.e., the object being monitored). All power supply circuits corresponding to the same load identifier physically serve the same electrical load.

[0038] A load refers to an independent electrical unit within or served by a monitored device, which consumes electrical energy and possesses identifiable electrical behavior characteristics. In this application, a monitored device may contain one or more loads, each powered by one or more power supply circuits. Different loads are functionally or physically independent of each other, such as multiple server racks connected under the same cabinet (monitored device), multiple water pumps within the same control box, or primary and backup load modules in a dual-power uninterruptible power supply system. Each load is distinguished by a unique load identifier for separate current aggregation and status monitoring.

[0039] The association relationship refers to the data mapping established in the preset power supply circuit configuration information, which is used to indicate which load identifier a certain power supply circuit (through its circuit information) belongs to, thereby realizing the logical binding of "circuit → load".

[0040] A current acquisition terminal refers to an intelligent sensing device installed on each power supply circuit to acquire phase current signals. It typically includes a current transformer (CT), a signal conditioning circuit, an analog-to-digital converter module, and a communication interface, and can output phase current vector data with timestamps.

[0041] Transmission channel information refers to the identifier used to uniquely identify the communication path of the current acquisition terminal. It can take the form of a channel address (such as a Modbus communication address), a Controller Area Network (CAN) bus identifier, an Ethernet Internet Protocol Address (IP address) and port number, an analog input channel number, etc., to ensure that the system can accurately associate the acquired phase current vector with the corresponding power supply circuit.

[0042] In some embodiments, the configuration information of the preset power supply circuit corresponding to the monitored device is stored in a table format in the database inside the monitored device.

[0043] For example, when the monitored equipment is a power distribution device, the load of the power distribution device includes the main transformer fan and lighting. The main transformer fan corresponds to two power supply circuits, one of which is connected to power source 1 and the other is connected to power source 2. The preset power supply circuit configuration information of the power distribution device is stored in the database inside the monitored equipment in tabular form, as shown in Table 1:

[0044] Table 1

[0045]

[0046] In some embodiments, the system can automatically construct and initialize preset power supply circuit configuration information, avoiding manual input errors and improving system deployment efficiency and configuration accuracy. Before obtaining the preset power supply circuit configuration information corresponding to the monitored device, the system further includes:

[0047] Obtain the physical connection topology between each power supply circuit and the load in the monitored device, as well as the transmission channel information of the current acquisition terminal associated with each power supply circuit;

[0048] Based on the physical connection topology and the transmission channel information of the current acquisition terminal associated with each power supply circuit, the preset power supply circuit configuration information corresponding to the monitored device is generated.

[0049] Among them, the physical connection topology refers to the actual electrical connection structure between each power supply circuit and the electrical load in the monitored equipment. It is used to uniquely identify the load object served by each power supply circuit, and its content includes the path information of the power supply circuit and the corresponding load identifier.

[0050] Understandably, the physical connection topology indicates the actual electrical connection path between each power supply circuit and the electrical load in the monitored equipment, used to establish a one-to-one mapping relationship between "power supply circuit and load". This relationship can be obtained through on-site wiring diagrams, equipment nameplates, automatic scanning by intelligent power distribution systems, or electronic tag identification. Its core content includes: the starting point of each power supply circuit (such as circuit breaker number), intermediate path (such as cable number), and ending load (such as equipment name or load identifier), and can serve as a data source for generating preset power supply circuit configuration information.

[0051] For example, in the distribution box (as the monitored device) of a substation's main control building, power supply circuit A is led out from circuit breaker QF101 and connected to the cooling fan of main transformer #1 (load identification "LOAD-FAN-01") via cable CAB-205; power supply circuit B is led out from circuit breaker QF102 and also connected to the same fan via cable CAB-206 (achieving dual power supply redundancy); while power supply circuit C is led out from circuit breaker QF201 and connected to the emergency lighting system (load identification "LOAD-LIGHT-01") via cable CAB-301. At this point, the physical connection topology is clearly recorded as follows: power supply circuit A → load "LOAD-FAN-01", power supply circuit B → load "LOAD-FAN-01", and power supply circuit C → load "LOAD-LIGHT-01". If it is known at the same time that the Modbus address of the current acquisition terminal corresponding to power supply circuit A is 101, that of power supply circuit B is 102, and that of power supply circuit C is 103, then the system can automatically generate preset power supply circuit configuration information.

[0052] In some embodiments, the system can dynamically maintain and adaptively update preset power supply circuit configuration information, avoiding monitoring logic failures caused by equipment modifications, load adjustments, or circuit additions or deletions, thereby ensuring the continuous accuracy of equipment status monitoring and system availability. The system also includes:

[0053] When a change in the power supply circuit configuration of the monitored device is detected, the configuration update information corresponding to the change is obtained;

[0054] Based on the configuration update information, the configuration information of the preset power supply circuit corresponding to the monitored device is updated to obtain the updated preset power supply circuit configuration information.

[0055] Among them, the power supply circuit configuration refers to the logical and physical relationship between each power supply circuit in the monitored equipment and the load it serves. It includes the identifier of each power supply circuit, the transmission channel information of the associated current acquisition terminal, and the load identifier to which it belongs. These core parameters are the basic data for realizing current aggregation and anomaly judgment on a load-by-load basis.

[0056] Change refers to the addition, deletion, modification, or remapping of any element in the power supply circuit configuration. For example, adding a circuit to supply power to a certain load, reconnecting a circuit from the original load to a new load, or changing the transmission channel information due to the replacement of a current acquisition terminal.

[0057] Configuration update information refers to structured data used to describe changes in the configuration of power supply circuits, including the type of change (such as addition / deletion / modification), the identification of the power supply circuits involved, the new load identification, the updated transmission channel information, etc. It can be manually entered by maintenance personnel, pushed by the engineering change management system, or captured in real time by the topology automatic sensing module of the intelligent power distribution system.

[0058] The updated preset power supply circuit configuration information refers to the latest version configuration data generated after integrating the updated configuration information on the basis of the original preset configuration. It is used for subsequent power supply circuit grouping, current vector superposition and abnormal state judgment to ensure that the monitoring logic is consistent with the actual wiring on site.

[0059] It is understandable that power supply circuit configurations are not static, but may be dynamically adjusted as equipment capacity is expanded, fault isolation is implemented, redundancy switching is carried out, or system upgrades are performed. If the configuration information is not updated in sync, it will lead to current aggregation errors (such as mistakenly grouping circuits with different loads into one group), which in turn will cause missed or false alarms.

[0060] For example, a data center server rack (the monitored device) is initially configured with two power supply circuits (Power Supply Circuit A and Power Supply Circuit B) jointly powering load "Rack-01", with the corresponding load identifier "LOAD-RACK01". Later, due to business expansion, a third power supply circuit C is added specifically for the same rack, creating three-way redundancy. At this point, the power supply circuit configuration changes to "new". When this change is detected and the configuration update information is obtained, the content includes: Change type: New; Power supply circuit identifier: Power Supply Circuit C; Associated current acquisition terminal transmission channel information: Modbus address 103; Affiliated load identifier: LOAD-RACK01. Based on this, the original preset power supply circuit configuration information (containing only Power Supply Circuit A and Power Supply Circuit B) is updated to a new configuration including Power Supply Circuits A, B, and C. Subsequent status monitoring can then correctly aggregate the phase current vectors of the three power supply circuits, accurately reflecting the actual total current of Rack-01 and avoiding the underestimation of abnormal current due to the omission of Power Supply Circuit C.

[0061] In some embodiments, current aggregation errors and misjudgments caused by missing, mismatched, or abnormally formatted preset power supply circuit configuration information can be effectively prevented, improving system robustness and monitoring reliability. After obtaining the preset power supply circuit configuration information corresponding to the monitored device, the system further includes:

[0062] Perform integrity verification on the preset power supply circuit configuration information;

[0063] If the verification fails, the preset power supply circuit configuration information will be discarded and a configuration error alarm will be generated.

[0064] Among them, the configuration error alarm refers to an abnormal prompt signal or log event actively triggered by the monitored device or the server communicating with it when the preset power supply circuit configuration information does not meet the preset integrity rules. It is used to notify the operation and maintenance personnel that the configuration data has defects and needs to be verified or re-imported. This alarm can be output through human-machine interface display, SMS / email push, Simple Network Management Protocol Trap reporting, or writing to the system log.

[0065] Understandably, the preset power supply circuit configuration information is the foundation for achieving "multi-circuit current aggregation by load," and its completeness directly determines the correctness of subsequent grouping and vector overlay. If the preset power supply circuit configuration information contains missing key fields (such as a power supply circuit not being associated with a load identifier), duplicate transmission channel information (multiple power supply circuits pointing to the same acquisition channel), or invalid load identifiers, it will lead to incorrect power supply circuit grouping, resulting in distorted total current vector calculations and potentially causing missed or false alarms. Therefore, intercepting abnormal configurations in advance through an integrity verification mechanism and alerting to risks via configuration error warnings can prevent the system from making erroneous state judgments driven by incorrect data, ensuring the reliability of the monitoring logic.

[0066] For example, if the circuit information of a power supply circuit is missing the corresponding load identifier, or if two different circuits are incorrectly configured to use the same Modbus address (i.e., transmission channel information conflict), the integrity verification module will determine that the verification fails, automatically discard the configuration version, and generate a configuration error alarm, prompting "Circuit #P15-1 lacks load identifier" or "Modbus address 102 has been repeatedly assigned", thereby guiding maintenance personnel to correct the configuration file in a timely manner.

[0067] In some embodiments, when the monitored device is detected to be powered on or has completed initialization, its corresponding preset power supply circuit configuration information is automatically obtained.

[0068] 102. Through the current acquisition terminal associated with each power supply circuit in the monitored equipment, multiple phase current vectors are acquired synchronously, and the transmission channel information corresponding to each phase current vector is obtained.

[0069] The phase current vector is a complex number obtained by frequency domain analysis of the current signal of the power supply circuit. Its real part and imaginary part correspond to the projections under the reference cosine and sine basis functions, respectively, and are used to characterize the amplitude and phase of the current.

[0070] The real part refers to the projection of the phase current vector onto the reference cosine component (i.e., the in-phase component). Mathematically, it is equal to the inner product of the current signal and the reference cosine function within the sampling window, and is used to characterize the in-phase component of the current and the reference cosine wave.

[0071] The reference cosine component refers to the standard cosine function used in Fourier transform to extract the in-phase component of a current signal. Its frequency is consistent with the harmonic frequency to be analyzed, and its initial phase is usually set to 0. This component, together with the reference sine component, forms a set of orthogonal basis functions, which are used to decompose the time-domain current signal into real (in-phase) and imaginary (orthogonal) components with clear physical meaning, thereby preserving the amplitude and phase information of the current.

[0072] The imaginary part refers to the projection of the current vector onto the reference sine component (i.e., the orthogonal component). Mathematically, it is equal to the inner product of the current signal and the reference sine function within the sampling window, and is used to characterize the orthogonal component of the current and the reference sine wave.

[0073] The reference sine component refers to the standard sine function used in Fourier transform to extract the orthogonal components of a current signal. Its frequency is consistent with the harmonic frequency to be analyzed, and its initial phase is usually set to 0. This component is orthogonal to the reference cosine component (90° out of phase), together forming an orthogonal basis on the complex plane, used to decompose the phase information of the current signal.

[0074] It is understandable that the phase current vector can be used for single-phase power supply systems (such as collecting only the current of phase A) or multi-phase power supply systems (such as simultaneously collecting the currents of phases A, B, and C, denoted as I). A I B I C Each phase independently generates a corresponding phase current vector for subsequent phase-by-phase or composite analysis.

[0075] The transmission channel information corresponding to the phase current vector refers to the communication path identifier used to uniquely identify the source of the phase current vector, which is bound to the current acquisition terminal that acquires the current. Since each current acquisition terminal is deployed in a specific power supply circuit and uploads data through a specific communication interface (such as Modbus slave address, CAN bus ID, Ethernet IP+port, or analog input channel number), this transmission channel information can be directly mapped to the specific power supply circuit.

[0076] In some embodiments, the current acquisition terminal performs Fourier transform processing on the current signal of the power supply circuit to obtain the current vector corresponding to the current signal of the power supply circuit. The current vector includes a real part and an imaginary part. The current signal is acquired by the current transformer corresponding to the current acquisition terminal, including:

[0077] Based on the preset harmonic order and the sampling point number corresponding to each current sampling value, calculate the harmonic angle index corresponding to each current sampling value;

[0078] Based on the harmonic angle index, the corresponding reference cosine value and reference sine value are obtained from the preset cosine lookup table and sine lookup table respectively;

[0079] The real part of the current vector is obtained by multiplying each current sample value in the sampling window with its corresponding reference cosine value and summing the results.

[0080] The imaginary part of the current vector is obtained by multiplying each current sample value in the sampling window with its corresponding reference sine value and summing the results.

[0081] The sampling window refers to the time interval used for a single Fourier transform analysis, which contains a fixed number of continuous sampling points, usually corresponding to one or more power frequency cycles (e.g., 20ms corresponds to one cycle of a 50Hz fundamental frequency).

[0082] Time sequence refers to the order in which current sampling values ​​are arranged according to the actual time of occurrence, ensuring the integrity of signal timing.

[0083] The current sampling value refers to the digital quantity obtained by quantizing the phase current of the feeder circuit at a specific moment through a current transformer and an analog-to-digital converter (ADC). The unit is usually an integer or floating-point value.

[0084] A discrete sequence refers to a digital signal sequence consisting of a finite number of current sample values ​​arranged in time sequence; it is a discretized representation of a continuous current signal.

[0085] The preset harmonic order refers to the multiple of the target analysis frequency set by the user or system relative to the fundamental frequency. For example, 1 represents the fundamental frequency (50Hz), 3 represents the third harmonic (150Hz), etc.

[0086] The sampling point number refers to the position number of each current sampling value within the sampling window, starting from 0 or 1 and increasing sequentially. It is used to identify the relative time position of each sampling point in the window, specifically i=0,1,…,N-1.

[0087] The total number of sampling points N is the total number of samples within the sampling window, usually 128, 256, etc.

[0088] The harmonic angle index is an integer index calculated based on the sampling point number and the preset harmonic order, used to quickly locate the storage position of the corresponding phase angle in the lookup table.

[0089] Harmonic Angle Index The "%" symbol represents the modulo operation, which is used to map angles to the valid index range of the lookup table.

[0090] The cosine lookup table is a pre-calculated and stored array of reference cosine values ​​that corresponds one-to-one with the sampling point number, satisfying... .

[0091] A sine lookup table refers to a pre-calculated and stored array of reference sine values ​​that corresponds one-to-one with the sampling point index, satisfying... .

[0092] The reference cosine value refers to the reference cosine function value cos(2π·π / 2) at the i-th sampling point under a specified harmonic frequency. ·i / N), where Where is the harmonic order, N is the total number of sampling points, and i is the sampling point number.

[0093] The reference sine value refers to the reference sine function value sin(2π·π / 2) at the i-th sampling point under a specified harmonic frequency. ·i / N), meaning the same as above.

[0094] The specific calculation process for performing Fourier transform on the current signal of the feeder circuit is as follows:

[0095] ,For example =1 indicates that the fundamental frequency is being analyzed. =3 represents the third harmonic;

[0096] ;

[0097] org[i]: The i-th current sample value, i=0,1,…,N−1;

[0098] , This indicates a modulo operation, ensuring that the index is in the range [0, N-1].

[0099] , , That is, the inner product of the current sample value and the reference cosine value;

[0100] , , That is, the inner product of the current sample value and the reference sine value.

[0101] In some embodiments, by compensating for the communication link delay of each current acquisition terminal, high-precision time-synchronous acquisition of multi-loop phase current vectors is achieved, effectively eliminating the phase inaccuracy problem caused by communication delay differences, thereby ensuring the accuracy of subsequent vector superposition results and improving the reliability and sensitivity of equipment status monitoring in multi-loop power supply scenarios. Multiple phase current vectors are synchronously acquired through the current acquisition terminals associated with each power supply loop in the monitored equipment, and the transmission channel information corresponding to each phase current vector is obtained, including:

[0102] The one-way communication delay time between the current acquisition terminal and the current acquisition terminal corresponding to each power supply circuit in the monitored equipment is obtained. The current acquisition terminal is connected to the current transformer of the corresponding power supply circuit.

[0103] Determine the target current acquisition time;

[0104] For each current acquisition terminal, the target current acquisition time is subtracted from its corresponding one-way communication delay time to obtain the acquisition command sending time corresponding to the current acquisition terminal.

[0105] Based on the acquisition command sending time, a current acquisition command is sent to the corresponding current acquisition terminal. The current acquisition command includes the target current acquisition time. The current acquisition command is used to instruct the current acquisition terminal to sample the current signal output by the connected current transformer and generate a phase current vector at the target current acquisition time.

[0106] Receive the phase current vectors that are synchronously acquired and returned by each current acquisition terminal based on the target current acquisition time.

[0107] The one-way communication delay refers to the propagation delay of a communication command issued by the execution entity of the equipment status monitoring method (such as the local main control unit of the monitored equipment or a remote server) during transmission to the corresponding current acquisition terminal via the communication link. Communication commands include control messages used to coordinate sampling timing, such as synchronization requests and current acquisition commands. The communication link refers to the physical transmission medium and communication interface connecting the execution entity and the current acquisition terminal, such as industrial communication channels like RS485 bus, CAN bus, and Ethernet.

[0108] Current transformers are used to sense the current in the corresponding power supply circuit and output a secondary current signal that is proportional to it.

[0109] The target current acquisition time refers to the preset absolute time point (such as a UTC timestamp or a certain moment under the system synchronization clock) at which all current acquisition terminals must uniformly perform current sampling. This is used to ensure that the current signals of each circuit are sampled at the same instant, thereby ensuring phase consistency.

[0110] The acquisition command sending time refers to the moment when the executing entity needs to send the acquisition command in advance so that the current acquisition terminal can perform sampling exactly when its local time is equal to the target current acquisition time. It is calculated by subtracting the one-way communication delay time of the corresponding current acquisition terminal from the target current acquisition time.

[0111] The current acquisition command refers to the control message sent by the executing entity to the current acquisition terminal, which includes the target current acquisition time and other necessary parameters (such as sampling frequency, channel selection, etc.) to trigger the terminal to synchronously sample and process the input current signal at a specified time.

[0112] The current signal refers to the analog secondary current signal output by the current transformer after sensing the primary AC current in the corresponding power supply circuit. This analog secondary current signal is proportional to the primary AC current and serves as the input source for the current acquisition terminal, used for subsequent digitization, frequency domain analysis, and phase current vector generation.

[0113] Understandably, without communication delay compensation, current acquisition terminals at different distances or with different communication loads will receive acquisition commands at different times, resulting in microsecond-level deviations in the actual sampling time. In a 50Hz power frequency system, a time deviation of 100μs can introduce approximately 1.8° of phase error. When multiple circuits are superimposed, this may cause underestimation or cancellation of amplitude, masking the true fault characteristics. Through the aforementioned feedforward compensation mechanism based on unidirectional communication delay time, sub-period-level (e.g., <10μs) multi-point synchronous sampling can be achieved, significantly improving the fidelity of the synthesized current vector.

[0114] In some embodiments, the one-way communication delay time between each current acquisition terminal and the monitoring execution entity can be accurately measured, avoiding delay estimation deviations caused by network asymmetry, differences in device processing, or different wiring lengths. This provides a reliable time compensation basis for high-precision synchronous sampling, significantly improving the phase consistency and synthesis accuracy of multi-loop phase current vectors. Before obtaining the one-way communication delay time between the current acquisition terminal corresponding to each power supply loop in the monitored device, the method further includes:

[0115] Send a synchronization request to the current acquisition terminal corresponding to each power supply circuit in the monitored equipment;

[0116] Receive confirmation responses from each current acquisition terminal based on the synchronization request;

[0117] Obtain the preset request response time for each current acquisition terminal. The request response time represents the internal processing delay experienced by the corresponding current acquisition terminal after receiving the synchronization request and before issuing the confirmation response.

[0118] For each current acquisition terminal, the one-way communication delay time corresponding to the current acquisition terminal is determined based on the reception time of the acknowledgment response, the sending time of the synchronization request, and the request response time of the current acquisition terminal.

[0119] The synchronization request refers to a control message actively sent by the entity executing the device status monitoring method (such as the local main control unit of the monitored device or a remote server) to the current acquisition terminal to initiate the communication delay measurement process. This request includes a timestamp or sequence number to identify this ranging interaction.

[0120] The confirmation response refers to the response message generated and returned by the current acquisition terminal to the execution entity after receiving the synchronization request, based on its internal logic. It is used to indicate that the synchronization request has been successfully received and serves as a feedback signal for calculating the communication delay.

[0121] The request response time refers to a fixed delay parameter preset or calibrated at the hardware and firmware level by the current acquisition terminal. It represents the internal processing delay experienced from the time its communication interface fully receives the synchronization request to the time it begins to send an acknowledgment response through the communication link. This value is usually tested and written into the device configuration register by the manufacturer at the factory, or obtained through offline calibration.

[0122] Internal processing delay refers to the time required for the current acquisition terminal to complete internal operations such as protocol parsing, task scheduling, and response generation after receiving external instructions, excluding the transmission time on the communication link.

[0123] The confirmation response reception time refers to the absolute timestamp recorded locally by the executing entity when it sends a synchronization request to a certain current acquisition terminal (e.g., based on the system's high-precision clock).

[0124] The time of sending the synchronization request refers to the absolute timestamp recorded locally by the executing entity when it receives the confirmation response returned by the current acquisition terminal.

[0125] The request response time of the current acquisition terminal refers to the internal processing delay consumed by the current acquisition terminal from receiving the synchronization request to starting to send the confirmation response. This parameter reflects the inherent response characteristics of the slave hardware and software stack, and is usually calibrated and pre-stored during the system initialization phase.

[0126] In some embodiments, it can be ensured that the target current acquisition time is strictly aligned with the periodic boundary of the AC current signal, avoiding spectral leakage and phase distortion caused by the sampling time deviating from the full cycle of the power frequency, thereby improving the accuracy of phase current vector extraction and providing phase-consistent basic data for the vector superposition of multi-loop currents. Determining the target current acquisition time includes:

[0127] Obtain the grid frequency of the power distribution system and calculate the current signal period based on the grid frequency;

[0128] Based on the current system time, the smallest time point that is no earlier than the current system time and is an integer multiple of the current signal period is taken as the target current acquisition time.

[0129] The power distribution system refers to the low-voltage or medium-voltage power distribution network that provides power to the monitored equipment. It typically includes components such as transformers, busbars, circuit breakers, feeders, and electrical loads. Its output voltage / current exhibits a stable sinusoidal waveform characteristic.

[0130] The power grid frequency refers to the fundamental frequency of AC voltage or current in a power distribution system, usually 50Hz or 60Hz, and is a basic parameter that determines the period of the current signal.

[0131] The period of a current signal refers to the time required for the current signal to complete a full sine wave, and its value is equal to the reciprocal of the power grid frequency (for example, 50Hz corresponds to a period of 20ms).

[0132] The current system time refers to the real-time timestamp read by the local high-precision clock of the executing entity when performing sampling scheduling, which serves as the starting reference point for calculating the target acquisition time.

[0133] The target current acquisition time refers to the future time uniformly specified by the executing entity to trigger synchronous sampling of all current acquisition terminals. This time is constrained to an integer multiple of the current signal period to ensure that the sampled values ​​of each branch are at the same electrical angle, thus ensuring the accuracy of subsequent vector synthesis.

[0134] Understandably, determining the target current acquisition time allows multiple current acquisition terminals to complete sampling at the same power frequency phase point, effectively eliminating phase mismatch problems caused by periodic fluctuations in the power grid or random sampling, and significantly improving the accuracy of total residual current calculation and the reliability of leakage current judgment.

[0135] 103. Based on the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, the power supply circuits in the monitored equipment are grouped to obtain at least one power supply circuit set. The circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier.

[0136] The matching process involves comparing the transmission channel information carried by the acquired phase current vector with the transmission channel information contained in the circuit information of each power supply circuit recorded in the preset power supply circuit configuration information. If the two match, the phase current vector is determined to belong to that power supply circuit. Through this matching, the original current data can be mapped to a specific power supply circuit.

[0137] A power supply loop set refers to a logical unit formed after grouping processing, containing one or more power supply loops. These power supply loops are associated with the same load identifier in the preset power supply loop configuration information. Each power supply loop set represents an independent power load (such as a dual-power server rack), and all power supply loops within it jointly supply power to the load. Subsequently, the phase current vectors within the set will be vector-superimposed to obtain the total input current characteristics of the load.

[0138] Understandably, matching is the key bridge for achieving the three-level mapping of "data-loop-load". Only accurate matching can ensure that current data from different physical loops are correctly assigned to the corresponding load groups. If the matching is incorrect (such as due to misconfiguration of channels), loops from different loads will be incorrectly aggregated, causing distortion of the synthesized current and leading to misjudgment of the status.

[0139] 104. For each set of power supply circuits, the phase current vectors of each power supply circuit in the set are vector superimposed to obtain the total current vector corresponding to the set of power supply circuits.

[0140] Here, the total current vector refers to the composite current value obtained by vector superposition of the phase current vectors of each power supply circuit in the power supply circuit set in the complex domain. Specifically, let the phase current vector of the i-th power supply circuit be... ,in This is its real part (corresponding to the projection of the reference cosine component). Let be its imaginary part (corresponding to the projection of the reference sine component), and j be the imaginary unit (j=−1, used in electrical engineering to avoid confusion with the current symbol i). Then the total current vector corresponding to this set of power supply circuits is... It can be represented as: , It is the sum of the real parts of the phase current vectors of all power supply circuits in the power supply circuit set. It is the sum of the imaginary parts of the phase current vectors of all power supply circuits in the power supply circuit set.

[0141] It is understandable that in a single-phase power supply scenario, all power supply circuits in the power supply circuit set serve the same phase (such as phase A). Therefore, it is only necessary to perform the above vector superposition on all phase current vectors of that phase to obtain the single-phase total current vector of the load.

[0142] In a three-phase power supply scenario, if the power supply circuit set contains multi-phase circuits, it needs to be processed independently for each phase: the phase current vectors of all phase A circuits are vector-superimposed to obtain the total phase A current vector I. A Similarly, calculate phase B I respectively. B and C phase I C The total current vector. Ultimately, the total current characteristic of this power supply circuit set is determined by the three-phase total current vector group {I... A ,I B ,I C Common representation.

[0143] In some embodiments, the system can automatically identify and correct phase reversal of phase current vectors caused by incorrect installation orientation of current transformers or reverse polarity of field wiring, avoiding current cancellation or amplitude underestimation when multiple loop vectors are superimposed due to polarity errors, thereby significantly improving the accuracy of total current vector calculation and the reliability of equipment status monitoring. Loop information includes a polarity reversal indicator, which indicates that the phase current vector of the corresponding power supply loop has reversed phase due to reverse polarity of the current transformer or wiring.

[0144] The phase current vectors of each power supply circuit in the power supply circuit set are vector-superimposed to obtain the total current vector corresponding to the power supply circuit set, including:

[0145] For each power supply circuit in the power supply circuit set, obtain its corresponding circuit information from the preset power supply circuit configuration information;

[0146] Based on the polarity inversion identifier in the circuit information corresponding to the power supply circuit, the phase current vector of the power supply circuit is corrected by inverting the sign to obtain the corrected phase current vector.

[0147] By superimposing all the corrected phase current vectors, the total current vector corresponding to the power supply circuit set is obtained.

[0148] The polarity reversal flag refers to a Boolean flag (e.g., "0" indicates normal polarity, "1" indicates that polarity needs to be reversed) set for each power supply circuit in the preset power supply circuit configuration information. It is used to mark whether the current direction is reversed due to reverse connection of the secondary side wiring of the current transformer or incorrect primary side through-hole direction.

[0149] Wiring polarity refers to the connection direction between the secondary output terminals of the current transformer (usually marked as S1 / S2 or "+ / -") and the input terminals of the current acquisition terminal. If S1 is connected to the positive terminal of the acquisition device and S2 is connected to the negative terminal, it is the correct polarity; otherwise, it is a reverse polarity connection, which will cause the output current signal to shift by 180°.

[0150] Phase reversal refers to the 180° phase shift of the acquired phase current vector relative to the actual physical current direction due to incorrect wiring polarity. Mathematically, this is equivalent to multiplying the original current vector by -1 (i.e., inverting both the real and imaginary parts).

[0151] The corrected phase current vector refers to the modified vector obtained by inverting the sign of the phase current vector according to the polarity inversion indicator. If the polarity inversion indicator is "Needs to be inverted", then the correction method is I. corr =−I raw Otherwise I corr =I raw This ensures that the directions of all phase current vectors involved in the superposition are consistent.

[0152] Understandably, in multi-circuit redundant power supply scenarios (such as dual-power server racks), if one circuit experiences polarity reversal due to wiring errors, and the system fails to correct this, the two phase current vectors that should be superimposed in the same direction will partially or even completely cancel each other out, resulting in a combined current far lower than the actual value, potentially masking overload or short-circuit faults. By introducing a polarity reversal indicator and performing sign correction, the impact of such human-caused wiring errors can be effectively eliminated, ensuring the robustness of the monitoring logic.

[0153] 105. When the magnitude of the total current vector corresponding to any power supply circuit set exceeds the preset current threshold range, it is determined that the monitored equipment is in an abnormal state.

[0154] The magnitude of the total current vector refers to the magnitude of the total current vector obtained by superimposing the sets of power supply circuits. The calculation formula is as follows: .

[0155] The preset current threshold range refers to the normal operating current range pre-configured for a specific load, typically consisting of a lower limit (such as the minimum operating current) and an upper limit (such as 110% of the rated current or the protection setting value). If the total current amplitude is lower than the lower limit, it may indicate that the load has lost power or that part of the circuit is disconnected; if it is higher than the upper limit, it may indicate an overload, a short circuit, or unexpected parallel operation.

[0156] An abnormal state refers to a situation where the power supply status of a load in the monitored equipment deviates from the normal operating condition. The judgment is based on the fact that the amplitude of the total current vector of the corresponding power supply circuit set exceeds the preset current threshold range, indicating that there is a potential electrical fault or operational risk.

[0157] Understandably, monitoring the current of a single circuit may not be able to detect anomalies caused by the combined action of multiple circuits (such as a dual-power load where a fault in one circuit causes an overload in the other). This solution, by aggregating the current on a load-by-load basis, can more accurately reflect the overall load status of the electrical equipment, thereby improving the sensitivity and accuracy of anomaly detection.

[0158] In some embodiments, after detecting an abnormal load current, the system can automatically associate and output information about the specific power supply circuit involved, realizing a closed-loop alarm from "abnormality detection" to "fault location." This significantly improves the efficiency of maintenance personnel in troubleshooting multi-circuit power supply equipment and avoids the problem that traditional alarms only indicate "an abnormal load" without specifying the exact circuit path. The circuit information includes the circuit identifier of the corresponding power supply circuit.

[0159] After determining that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any power supply circuit set exceeds the preset current threshold range, the process also includes:

[0160] Obtain the circuit identifier of each power supply circuit in any power supply circuit set from the preset power supply circuit configuration information;

[0161] Get the preset alarm template;

[0162] Based on the circuit identifiers of each power supply circuit in any power supply circuit set and the preset alarm template, abnormal alarm information is generated for the monitored equipment and sent to the monitoring platform. The abnormal alarm information is used to indicate the power supply circuit in the monitored equipment that is in an abnormal state.

[0163] The circuit identifier refers to the code or string used to uniquely identify a power supply circuit in the monitored equipment. It is usually generated by the power distribution system design specifications or engineering naming rules, such as "#P13-5" or "A-FEEDER-02". It can include information such as cabinet number, circuit breaker location, and phase, which facilitates quick on-site location of physical circuits.

[0164] Preset alarm templates refer to the structured alarm message format pre-configured by the system, which includes fixed text (such as "abnormal load current") and dynamic field placeholders (such as {load identifier}, {circuit list}, {current value}, {timestamp}) to standardize the generation of alarm content and ensure that the information is complete and the format is consistent.

[0165] Abnormal alarm information refers to the specific alarm message generated after filling in the actual operating data according to the preset alarm template. For example, "[Current Abnormality] The total current of load LOAD-RACK01 is 22.5A, which exceeds the threshold. The affected circuits are: #P13-5 and #P15-1". It is used to clearly convey the abnormal object, value and related circuit to the operation and maintenance personnel.

[0166] A monitoring platform refers to a supervisory management system that receives, displays, and processes equipment alarm information, including but not limited to energy management platforms (EMS), environmental monitoring systems, or cloud operation and maintenance centers, and supports functions such as alarm visualization, log recording, SMS / email push, and work order linkage.

[0167] A power supply circuit in an abnormal state refers to all power supply circuits belonging to the same abnormal power supply circuit set. Since the anomaly determination is based on the total current vector of the set as a whole, all circuits within the set are considered "power supply circuits in an abnormal state"—even if the current of individual circuits is not exceeded, they must be included in the alarm scope for comprehensive analysis because they collectively constitute the power supply path of the load.

[0168] Understandably, in dual-power or multi-circuit redundant power supply scenarios, the current of a single circuit may always be within the normal range, but due to an abnormal total load current (such as one circuit disconnecting and causing another circuit to overload), all related circuits still need to be marked as abnormal paths. With this solution, the system can not only identify "load abnormality" but also accurately point out "which power supply circuits are involved in the abnormality," thereby significantly shortening the fault diagnosis time.

[0169] To better implement the above methods, this application also provides a device status monitoring apparatus, which can be integrated into an electronic device, such as a terminal or server. The terminal can be a mobile phone, tablet computer, smart Bluetooth device, laptop computer, or personal computer; the server can be a single server or a server cluster composed of multiple servers.

[0170] For example, in this embodiment, a device status monitoring device specifically integrated into an electronic device will be used as an example to describe the method of this application embodiment in detail.

[0171] For example, such as Figure 2 As shown, the device status monitoring device may include an information acquisition unit 201, a data acquisition unit 202, a grouping unit 203, a vector overlay unit 204, and a status determination unit 205, as follows:

[0172] (I) Information Acquisition Unit 201.

[0173] The information acquisition unit 201 is used to acquire the preset power supply circuit configuration information corresponding to the monitored device. The preset power supply circuit configuration information includes the association between the circuit information of each power supply circuit in the monitored device and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit.

[0174] In some embodiments, after obtaining the preset power supply circuit configuration information corresponding to the monitored device, the method further includes:

[0175] Perform integrity verification on the preset power supply circuit configuration information;

[0176] If the verification fails, the preset power supply circuit configuration information will be discarded and a configuration error alarm will be generated.

[0177] In some embodiments, it also includes:

[0178] When a change in the power supply circuit configuration of the monitored device is detected, the configuration update information corresponding to the change is obtained;

[0179] Based on the configuration update information, the configuration information of the preset power supply circuit corresponding to the monitored device is updated to obtain the updated preset power supply circuit configuration information.

[0180] In some embodiments, before obtaining the preset power supply circuit configuration information corresponding to the monitored device, the method further includes:

[0181] Obtain the physical connection topology between each power supply circuit and the load in the monitored device, as well as the transmission channel information of the current acquisition terminal associated with each power supply circuit;

[0182] Based on the physical connection topology and the transmission channel information of the current acquisition terminal associated with each power supply circuit, the preset power supply circuit configuration information corresponding to the monitored device is generated.

[0183] (II) Acquisition Unit 202.

[0184] The acquisition unit 202 is used to synchronously acquire multiple phase current vectors through the current acquisition terminals associated with each power supply circuit in the monitored equipment, and obtain the transmission channel information corresponding to each phase current vector.

[0185] In some embodiments, multiple phase current vectors are synchronously acquired through current acquisition terminals associated with each power supply circuit in the monitored device, and the transmission channel information corresponding to each phase current vector is obtained, including:

[0186] The one-way communication delay time between the current acquisition terminal and the current acquisition terminal corresponding to each power supply circuit in the monitored equipment is obtained. The current acquisition terminal is connected to the current transformer of the corresponding power supply circuit.

[0187] Determine the target current acquisition time;

[0188] For each current acquisition terminal, the target current acquisition time is subtracted from its corresponding one-way communication delay time to obtain the acquisition command sending time corresponding to the current acquisition terminal.

[0189] Based on the acquisition command sending time, a current acquisition command is sent to the corresponding current acquisition terminal. The current acquisition command includes the target current acquisition time. The current acquisition command is used to instruct the current acquisition terminal to sample the current signal output by the connected current transformer and generate a phase current vector at the target current acquisition time.

[0190] Receive the phase current vectors that are synchronously acquired and returned by each current acquisition terminal based on the target current acquisition time.

[0191] In some embodiments, before acquiring the one-way communication delay time between the current acquisition terminal corresponding to each power supply circuit in the monitored device, the method further includes:

[0192] Send a synchronization request to the current acquisition terminal corresponding to each power supply circuit in the monitored equipment;

[0193] Receive confirmation responses from each current acquisition terminal based on the synchronization request;

[0194] Obtain the preset request response time for each current acquisition terminal. The request response time represents the internal processing delay experienced by the corresponding current acquisition terminal after receiving the synchronization request and before issuing the confirmation response.

[0195] For each current acquisition terminal, the one-way communication delay time corresponding to the current acquisition terminal is determined based on the reception time of the acknowledgment response, the sending time of the synchronization request, and the request response time of the current acquisition terminal.

[0196] In some embodiments, determining the target current acquisition time includes:

[0197] Obtain the grid frequency of the power distribution system and calculate the current signal period based on the grid frequency;

[0198] Based on the current system time, the smallest time point that is no earlier than the current system time and is an integer multiple of the current signal period is taken as the target current acquisition time.

[0199] (III) Grouping Unit 203.

[0200] Grouping unit 203 is used to group the power supply circuits in the monitored equipment based on the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, to obtain at least one power supply circuit set, and the circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier.

[0201] (iv) Vector superposition unit 204.

[0202] The vector superposition unit 204 is used to perform vector superposition of the phase current vectors of each power supply circuit in the power supply circuit set for each power supply circuit set, so as to obtain the total current vector corresponding to the power supply circuit set.

[0203] In some embodiments, the circuit information includes a polarity reversal identifier, which is used to indicate that the phase current vector of the corresponding power supply circuit is reversed due to the current transformer or wiring polarity reversal.

[0204] The phase current vectors of each power supply circuit in the power supply circuit set are vector-superimposed to obtain the total current vector corresponding to the power supply circuit set, including:

[0205] For each power supply circuit in the power supply circuit set, obtain its corresponding circuit information from the preset power supply circuit configuration information;

[0206] Based on the polarity inversion identifier in the circuit information corresponding to the power supply circuit, the phase current vector of the power supply circuit is corrected by inverting the sign to obtain the corrected phase current vector.

[0207] By superimposing all the corrected phase current vectors, the total current vector corresponding to the power supply circuit set is obtained.

[0208] (v) Status determination unit 205.

[0209] The status determination unit 205 is used to determine that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any set of power supply circuits exceeds the preset current threshold range.

[0210] In some embodiments, the circuit information includes the circuit identifier of the corresponding power supply circuit;

[0211] After determining that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any power supply circuit set exceeds the preset current threshold range, the process also includes:

[0212] Obtain the circuit identifier of each power supply circuit in any power supply circuit set from the preset power supply circuit configuration information;

[0213] Get the preset alarm template;

[0214] Based on the circuit identifiers of each power supply circuit in any power supply circuit set and the preset alarm template, abnormal alarm information is generated for the monitored equipment and sent to the monitoring platform. The abnormal alarm information is used to indicate the power supply circuit in the monitored equipment that is in an abnormal state.

[0215] In practice, each of the above units can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units, please refer to the previous method embodiments, which will not be repeated here.

[0216] Therefore, the embodiments of this application can effectively improve the accuracy and reliability of equipment status monitoring in multi-circuit power supply scenarios.

[0217] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0218] Therefore, embodiments of this application provide a computer-readable storage medium storing a plurality of instructions that can be loaded by a processor to execute the steps in any of the device status monitoring methods provided in embodiments of this application.

[0219] The storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0220] Since the instructions stored in the storage medium can execute the steps in any of the device status monitoring methods provided in the embodiments of this application, the beneficial effects that any of the device status monitoring methods provided in the embodiments of this application can achieve can be realized. For details, please refer to the previous embodiments, which will not be repeated here.

[0221] According to one aspect of this application, a computer program product or computer program is provided, comprising a computer program / instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer program / instructions from the computer-readable storage medium and executes the computer program / instructions, causing the electronic device to perform the method provided in the device status monitoring aspect of the above embodiments.

[0222] The above provides a detailed description of a device status monitoring method and apparatus provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method of equipment condition monitoring, characterized by, The method includes: Obtain the preset power supply circuit configuration information corresponding to the monitored device. The preset power supply circuit configuration information includes the association between the circuit information of each power supply circuit in the monitored device and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit. Multiple phase current vectors are simultaneously acquired through the current acquisition terminals associated with each power supply circuit in the monitored device, and the transmission channel information corresponding to each phase current vector is obtained. Based on the transmission channel information of each phase current vector and the matching relationship between the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, the power supply circuits in the monitored device are grouped to obtain at least one power supply circuit set, and the circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier. For each set of power supply circuits, the phase current vectors of each power supply circuit in the set are vector-superimposed to obtain the total current vector corresponding to the set of power supply circuits. When the magnitude of the total current vector corresponding to any set of power supply circuits exceeds the preset current threshold range, the monitored device is determined to be in an abnormal state.

2. The method of claim 1, wherein, The circuit information includes a polarity reversal identifier, which is used to indicate that the phase current vector of the corresponding power supply circuit is reversed due to the current transformer or wiring polarity reversal. The step of vector superimposing the phase current vectors of each power supply circuit in the power supply circuit set to obtain the total current vector corresponding to the power supply circuit set includes: For each power supply circuit in the power supply circuit set, its corresponding circuit information is obtained from the preset power supply circuit configuration information; Based on the polarity inversion identifier in the circuit information corresponding to the power supply circuit, the phase current vector of the power supply circuit is corrected by sign inversion to obtain the corrected phase current vector; By superimposing all the corrected phase current vectors, the total current vector corresponding to the power supply circuit set is obtained.

3. The method of claim 1, wherein, Also includes: When a change in the power supply circuit configuration of the monitored device is detected, the configuration update information corresponding to the change is obtained; Based on the configuration update information, the preset power supply circuit configuration information corresponding to the monitored device is updated to obtain the updated preset power supply circuit configuration information.

4. The method as described in claim 1, characterized in that, The circuit information includes the circuit identifier of the corresponding power supply circuit; After determining that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any power supply circuit set exceeds a preset current threshold range, the method further includes: Obtain the circuit identifier of each power supply circuit in any power supply circuit set from the preset power supply circuit configuration information; Get the preset alarm template; Based on the circuit identifier of each power supply circuit in any power supply circuit set and the preset alarm template, an abnormal alarm message for the monitored device is generated and sent to the monitoring platform. The abnormal alarm message is used to indicate the power supply circuit in the monitored device that is in an abnormal state.

5. The method as described in claim 1, characterized in that, Before obtaining the preset power supply circuit configuration information corresponding to the monitored device, the method further includes: Obtain the physical connection topology between each power supply circuit and the load in the monitored device, as well as the transmission channel information of the current acquisition terminal associated with each power supply circuit; Based on the physical connection topology and the transmission channel information of the current acquisition terminal associated with each power supply circuit, preset power supply circuit configuration information corresponding to the monitored device is generated.

6. The method as described in claim 1, characterized in that, The process involves synchronously acquiring multiple phase current vectors through current acquisition terminals associated with each power supply circuit in the monitored device, and obtaining transmission channel information corresponding to each phase current vector, including: The one-way communication delay time between the current acquisition terminal and the current acquisition terminal corresponding to each power supply circuit in the monitored device is obtained, wherein the current acquisition terminal is connected to the current transformer of the corresponding power supply circuit. Determine the target current acquisition time; For each current acquisition terminal, the target current acquisition time is subtracted from its corresponding one-way communication delay time to obtain the acquisition command sending time corresponding to the current acquisition terminal. Based on the acquisition instruction sending time, a current acquisition instruction is sent to the corresponding current acquisition terminal. The current acquisition instruction includes the target current acquisition time. The current acquisition instruction is used to instruct the current acquisition terminal to sample the current signal output by the connected current transformer and generate a phase current vector at the target current acquisition time. Receive the phase current vectors that are synchronously acquired and returned by each current acquisition terminal based on the target current acquisition time.

7. The method as described in claim 6, characterized in that, Before acquiring the one-way communication delay time between the current acquisition terminal corresponding to each power supply circuit in the monitored device, the method further includes: A synchronization request is sent to the current acquisition terminal corresponding to each power supply circuit in the monitored device; Receive confirmation responses from each current acquisition terminal based on the synchronization request; The preset request response time of each current acquisition terminal is obtained. The request response time represents the internal processing delay experienced by the corresponding current acquisition terminal after receiving the synchronization request and before issuing the confirmation response. For each current acquisition terminal, the one-way communication delay time corresponding to the current acquisition terminal is determined based on the reception time of the confirmation response, the sending time of the synchronization request, and the request response time of the current acquisition terminal.

8. The method as described in claim 6, characterized in that, The determination of the target current acquisition time includes: Obtain the grid frequency of the power distribution system and calculate the current signal period based on the grid frequency; Based on the current system time, the smallest time point that is no earlier than the current system time and is an integer multiple of the current signal period is taken as the target current acquisition time.

9. The method as described in claim 1, characterized in that, After obtaining the preset power supply circuit configuration information corresponding to the monitored device, the method further includes: The integrity of the preset power supply circuit configuration information is verified. If the verification fails, the preset power supply circuit configuration information is discarded and a configuration error alarm is generated.

10. A device for monitoring equipment status, characterized in that, The device includes: The information acquisition unit is used to acquire the preset power supply circuit configuration information corresponding to the monitored device. The preset power supply circuit configuration information includes the association relationship between the circuit information of each power supply circuit in the monitored device and the corresponding load identifier. The circuit information includes the transmission channel information of the current acquisition terminal associated with the corresponding power supply circuit. The acquisition unit is used to synchronously acquire multiple phase current vectors through the current acquisition terminals associated with each power supply circuit in the monitored device, and obtain the transmission channel information corresponding to each phase current vector; The grouping unit is used to group the power supply circuits in the monitored device based on the matching relationship between the transmission channel information of each phase current vector and the transmission channel information contained in each circuit information in the preset power supply circuit configuration information, to obtain at least one power supply circuit set, wherein the circuit information of each power supply circuit in each power supply circuit set corresponds to the same load identifier. The vector superposition unit is used to perform vector superposition of the phase current vectors of each power supply circuit in the power supply circuit set for each power supply circuit set, so as to obtain the total current vector corresponding to the power supply circuit set. The status determination unit is used to determine that the monitored device is in an abnormal state when the magnitude of the total current vector corresponding to any set of power supply circuits exceeds the preset current threshold range.

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