CN117607572A - Method and device for monitoring equipment state - Google Patents

Method and device for monitoring equipment state Download PDF

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Publication number
CN117607572A
CN117607572A CN202311478154.7A CN202311478154A CN117607572A CN 117607572 A CN117607572 A CN 117607572A CN 202311478154 A CN202311478154 A CN 202311478154A CN 117607572 A CN117607572 A CN 117607572A
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CN
China
Prior art keywords
circuit
monitoring
target
current
equipment
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Pending
Application number
CN202311478154.7A
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Chinese (zh)
Inventor
冒鹏程
董航飞
曹益明
顾晖
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Zhongtian Group Shanghai Superconducting Technology Co ltd
Jiangsu Zhongtian Technology Co Ltd
Original Assignee
Zhongtian Group Shanghai Superconducting Technology Co ltd
Jiangsu Zhongtian Technology Co Ltd
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Priority to CN202311478154.7A priority Critical patent/CN117607572A/en
Publication of CN117607572A publication Critical patent/CN117607572A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/55—Testing for incorrect line connections
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Abstract

The application provides a method and a device for monitoring equipment states. Wherein the method comprises the following steps: arranging a plurality of monitoring points in an equipment circuit between a battery pack acquired by target energy storage equipment and a current conversion device, wherein the equipment circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, and the current conversion device is used for converting alternating current in the alternating current circuit into direct current to be input into the equipment circuit or converting direct current in the equipment circuit into alternating current to be input into the alternating current circuit; under the condition that the target energy storage equipment is in an operating state, acquiring a current value in an equipment circuit and voltage drop values of a plurality of monitoring points in real time; respectively determining the real-time resistance of each of the plurality of monitoring points according to the current value and the plurality of voltage drop values; and sending circuit early warning information under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition. The method and the device solve the technical problem that the reliability of the monitoring method of the state of the related equipment is low.

Description

Method and device for monitoring equipment state
Technical Field
The invention relates to the field of electrical safety, in particular to a method and a device for monitoring equipment states.
Background
With the development of internet technology, the development of electric energy is better and better, and the electric energy is widely applied to production and daily life, so that in order to improve the quality and reliability of electric energy, various energy storage devices are generated, but the safety of a circuit in the energy storage devices is also a major concern for people, and the safety of a plurality of electrical devices connected with the circuit in the energy storage devices is a main reason for influencing the safety of the circuit, so that the electrical devices need to be monitored.
At present, a mode of monitoring a plurality of electrical devices in an energy storage device is to determine whether the electrical devices are safe or not according to labels when the electrical devices leave a factory before the electrical devices are connected to a circuit of the energy storage device for the first time, but the mode can cause unreliable monitoring results due to factors such as electrical aging and environment.
Aiming at the problem of low reliability of a monitoring method of the state of related equipment, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for monitoring equipment states, which at least solve the technical problem of reliability of the existing equipment state monitoring method.
According to an aspect of an embodiment of the present invention, there is provided a method for monitoring a device status, including: arranging a plurality of monitoring points in a device circuit between a battery pack and a current conversion device, wherein the device circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into the direct current to be input into the device circuit or converting the direct current in the device circuit into the alternating current to be input into the alternating current circuit; under the condition that the target energy storage equipment is in an operating state, acquiring a current value of the equipment circuit and voltage drop values of a plurality of monitoring points in real time; respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values; and sending circuit early warning information under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, wherein the target early warning condition is determined according to the position attribute of the target monitoring point.
According to another aspect of the embodiment of the present invention, there is also provided a device for monitoring a status of an apparatus, including: a layout unit, configured to layout a plurality of monitoring points in an equipment circuit between a battery pack and a current conversion device, where the equipment circuit is a dc circuit, the current conversion device is connected to an ac circuit of an alternating power grid, the battery pack is configured to store or release dc in the equipment circuit, and the current conversion device is configured to convert ac in the ac circuit into the dc to be input to the equipment circuit, or to convert the dc in the equipment circuit into the ac to be input to the ac circuit; the acquisition unit is used for acquiring the current value of the equipment circuit and the voltage drop value of each of the plurality of monitoring points in real time under the condition that the target energy storage equipment is in an operating state; the determining unit is used for determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values; and the sending unit is used for sending circuit early warning information under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets the target early warning condition, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
Optionally, the device for monitoring a state of the apparatus further includes: a first obtaining unit, configured to sequentially obtain, before sending circuit early warning information, the site attributes of each of the plurality of monitoring points, where the site attributes include a first resistance value of a copper bar included in the monitoring point, a second resistance value of a component included in the monitoring point, and a contact resistance value between the copper bar and the component, when the real-time resistance of a target monitoring point of the plurality of monitoring points meets a target early warning condition; the first determining unit is used for determining critical resistance values of each of the plurality of monitoring points according to the position attribute of each of the plurality of monitoring points; and the second determining unit is used for determining the target early warning condition according to the critical resistance value.
Optionally, the first obtaining unit includes a first obtaining subunit, configured to obtain a first temperature value of the copper bar and a second temperature value of the component included in the current detection point; a third determining unit, configured to determine the first resistance value of the copper bar according to the first temperature value, and determine the second resistance value of the component according to the second temperature value; and the second acquisition subunit is used for acquiring the connection torsion between the copper bar and the component and determining the contact resistance value between the copper bar and the component according to the connection torsion.
Optionally, the layout unit includes at least one of the following: the first layout unit is used for determining a fusing unit included in the equipment circuit as a first monitoring point; and the second layout unit is used for determining the load switch unit included in the equipment circuit as a second monitoring point.
Optionally, the device for monitoring a state of the apparatus further includes: and a fourth determining unit configured to determine that, when the real-time resistance of a target monitoring point of the plurality of monitoring points satisfies a target early warning condition, the real-time resistance of the target monitoring point satisfies the target early warning condition when the real-time resistance of the target monitoring point is greater than or equal to the critical resistance value before sending the circuit early warning information.
Optionally, the transmitting unit includes: the generating unit is used for generating the circuit early warning information according to the monitoring identification of the target monitoring point; and the sending unit is used for sending the circuit early warning information.
Optionally, the monitoring device for a device state further includes at least one of the following after the circuit early warning information is sent by the sending unit: a first switching unit configured to switch off the device circuit in response to a target control instruction; and a second cut-off unit configured to cut off the device circuit when the current value is less than or equal to a target threshold value.
According to yet another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium having a computer program stored therein, wherein the computer program is configured to perform the above-described method of monitoring a device state when run.
According to yet another aspect of embodiments of the present application, there is provided a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions so that the computer device performs the method of monitoring the status of the device as above.
According to still another aspect of the embodiments of the present invention, there is also provided an electronic device including a memory, in which a computer program is stored, and a processor configured to execute the above-described device state monitoring method by the computer program.
In the embodiment of the invention, a plurality of monitoring points are distributed in a device circuit between a battery pack and a current conversion device, wherein the battery pack is included in a target energy storage device, the device circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into the direct current to be input into the device circuit or converting the direct current in the device circuit into the alternating current to be input into the alternating current circuit; under the condition that the target energy storage equipment is in an operating state, acquiring a current value of the equipment circuit and voltage drop values of a plurality of monitoring points in real time; respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values; and sending circuit early warning information under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, wherein the target early warning condition is determined according to the position attribute of the target monitoring point. The monitoring method of the equipment state realized by the steps can monitor the equipment state of a plurality of pieces of electricity included in the energy storage equipment after the energy storage equipment is started, can effectively monitor the connection condition of the plurality of pieces of electricity in the energy storage equipment by monitoring the real-time resistance among a plurality of monitoring points, effectively monitor the influence of factors such as aging degradation, temperature change, torsion decay and the like on the real-time resistance of the electrical equipment when the energy storage equipment is operated for a long time, solve the technical problem of low reliability of the monitoring method of the related equipment state, and improve the reliability of monitoring the equipment state.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic diagram of an application scenario of an alternative method for monitoring a device status according to an embodiment of the present invention;
FIG. 2 is a flow chart of an alternative method of monitoring device status in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of an alternative method of monitoring device status in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of another alternative method of monitoring device status in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of an alternative device status monitoring apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an alternative electronic device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical terms to be used in the present application are described below:
EMS: an energy management system intended to help users efficiently manage energy consumption and storage, which provides a sustainable, economical and environmentally friendly energy management solution by monitoring, analyzing and optimizing energy sources;
BMS: the electronic device for monitoring and managing the storage battery further controls the charge and discharge process of the battery by collecting and calculating parameters such as voltage, current, temperature, SOC and the like, so that the protection of the battery is realized, and the comprehensive performance of the battery is improved.
According to an aspect of the embodiment of the present invention, there is provided a method for monitoring a device state, which may be applied, but not limited to, in an application environment of a method for monitoring a device state composed of a terminal device 101, an EMS102, a BMS103, a monitoring device 104, a power grid 105, a current conversion device 106, a sensor 113, and a high voltage box as shown in fig. 1, as an alternative implementation manner. As shown in fig. 1, the alternating current flowing into the current conversion device 106 from the power grid 105 includes a positive electrode of the current and a negative electrode of the current (two current flow arrows from the power grid 105 to the current conversion device 106 shown in fig. 1), the monitoring device 104 needs to monitor the voltage drop and also monitor the current, and in the process of monitoring the device status by the monitoring device 104, the method specifically includes the following steps:
s1, arranging a plurality of monitoring points (from a first monitoring point 107 to a sixth monitoring point 112 shown in fig. 1) in an equipment circuit between a battery pack and a current conversion device, wherein the target energy storage equipment comprises the equipment circuit, the equipment circuit is a direct current circuit, the current conversion device 106 is connected with an alternating current circuit of an alternating power grid (power grid 105), the battery pack is used for carrying out storage operation or release operation on direct current in the equipment circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into direct current to be input into the equipment circuit or converting direct current in the equipment circuit into alternating current to be input into the alternating current circuit;
S2, under the condition that the target energy storage equipment is in a motion state, acquiring a current value of an equipment circuit and voltage drop values of a plurality of monitoring points in real time;
s3, respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and S4, under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, sending circuit early warning information, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
The terminal device 101 is further provided with a display, a processor and a memory, wherein the display can be used for displaying a monitoring result of the monitoring method of the device state, and the processor can be used for processing the acquired monitoring result, such as compression processing or identification processing; the memory is used for storing the monitoring result.
It should be noted that, the battery pack shown in fig. 1 may be a single power system, or may be a high-power system including a plurality of battery packs, i.e., a battery cluster.
In the embodiment of the invention, a plurality of monitoring points are distributed in a device circuit between a battery pack and a current conversion device, wherein the battery pack is included in a target energy storage device, the device circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into the direct current to be input into the device circuit or converting the direct current in the device circuit into the alternating current to be input into the alternating current circuit; under the condition that the target energy storage equipment is in an operating state, acquiring a current value of the equipment circuit and voltage drop values of a plurality of monitoring points in real time; respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values; and sending circuit early warning information under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, wherein the target early warning condition is determined according to the position attribute of the target monitoring point. The monitoring method of the equipment state realized by the steps can monitor the equipment state of a plurality of pieces of electricity included in the energy storage equipment after the energy storage equipment is started, can effectively monitor the connection condition of the plurality of pieces of electricity in the energy storage equipment by monitoring the real-time resistance among a plurality of monitoring points, effectively monitor the influence of factors such as aging degradation, temperature change, torsion decay and the like on the real-time resistance of the electrical equipment when the energy storage equipment is operated for a long time, solve the technical problem of low reliability of the monitoring method of the related equipment state, and improve the reliability of monitoring the equipment state.
The above is merely an example, and is not limited in any way in the present embodiment.
As an alternative embodiment, as shown in fig. 2, the method for monitoring the status of the device may include the following steps:
s202, arranging a plurality of monitoring points in a device circuit between a battery pack and a current conversion device, wherein the device circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into direct current to be input into the device circuit or converting direct current in the device circuit into alternating current to be input into the alternating current circuit;
s204, under the condition that the target energy storage equipment is in a motion state, acquiring the current value of the equipment circuit and the voltage drop value of each of a plurality of monitoring points in real time;
s206, respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and S208, sending circuit early warning information under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
In the step S202, the target energy storage device converts electric power or other energy into storable form, and releases the electric power or other energy for use when needed, for example, an energy storage control bus (one of the main devices of the box-type energy storage system), where the current conversion device may convert direct current into alternating current in a circuit of the target energy storage device, where the device circuit is a direct current circuit, and the device circuit may be a circuit below the current conversion device 106 shown in fig. 1; the monitoring points may be connection points between the electrical device and the electrical device, connection points between the connection line (e.g. copper bar) and the electrical device, connection points between the connection line and the connection line (e.g. connection point between copper bar and copper bar), and multiple monitoring points for real-time resistance detection are both positive or both negative, where the multiple monitoring points are both positive (or both negative) as shown in fig. 1 as the first monitoring point 107, the second monitoring point 108, and the third monitoring point 109, and are both positive (or both negative) as shown in fig. 1 as the fourth monitoring point 110 as the fifth monitoring point 111 and the sixth monitoring point 112; the power grid (such as the power grid 105 shown in fig. 1) refers to the whole formed by power transformation stations and power transmission and distribution lines of various voltages in a power system, and is also called a power grid, the power grid comprises three units of power transformation, power transmission and power distribution, and the power grid has the task of transmitting and distributing electric energy and changing the voltage. The battery pack is a set of circuit systems consisting of batteries and is used for providing electric energy.
In the step S202, the arrangement of the plurality of monitoring points in the device circuit between the resistance value included in the target energy storage device and the current conversion device includes at least one of the following: determining a fusing unit included in a device circuit as a first monitoring point; a coincidence switching unit included in the device circuitry is determined to be a second monitoring point. It is understood that the first monitoring point and the second monitoring point may be two closest monitoring points on the same electrode.
The voltage drop value (also referred to as voltage or potential difference) in S204 is used to indicate the working force of the electric field force to move the charge.
The real-time resistance in S206 may be understood as, but not limited to, a contact resistance (a contact resistance value described below) determined by ohm' S law according to a current value and a voltage drop value, and the contact resistance is used to indicate a resistance between two traces due to incomplete contact of a contact surface, that is, a resistance due to an unsmooth contact surface or incomplete contact of a surface, and when two electrodes are in poor contact, a flow of current is blocked, thereby generating a contact resistance. In a narrow sense, the contact resistance is the resistance at the interface between the connecting conductors, broadly reflecting the amount of energy expended to move charge from one substance to another or the same substance, and this energy expended is what is known as a "drag" which is related to the material, geometry, contact interface condition, tightness of contact, etc. of the different conductors of the same wire.
The determining that the real-time resistance satisfies the target early-warning condition in S208 may be determining that the real-time resistance satisfies the target early-warning condition when the real-time resistance obtained in S202 to S206 is greater than or equal to a resistance threshold (the critical resistance value described below), the circuit early-warning information is used to indicate a device state in a device circuit, the circuit early-warning information includes positions of a plurality of monitoring points, electrical devices (the components described below) connected to the plurality of monitoring points, and the real-time resistance, and the resistance threshold may be based on a resistance value of the connection line itself, the real-time resistance (the real-time resistance), and an internal resistance value of the electrical devices (the electrical devices between the plurality of monitoring points) itself. The site attribute comprises the position of the monitoring point in the equipment circuit and connecting parts (comprising connecting wires, electrical equipment and the like) at two sides of the monitoring point; the method further includes sending first circuit early warning information when the real-time resistance is equal to a resistance threshold value, or the real-time resistance is smaller than the resistance threshold value (the critical resistance value) and a difference between the real-time resistance and the resistance threshold value (the critical resistance value) is smaller than a preset difference threshold value, wherein the first circuit early warning information is used for indicating that a device state in a device circuit is close to an abnormal state.
According to the embodiment of the application, a plurality of monitoring points are distributed in an equipment circuit between a battery pack and a current conversion device, wherein the battery pack is included in target energy storage equipment, the equipment circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on the direct current in the equipment circuit, and the current conversion device is used for converting the alternating current in the alternating current circuit into the direct current to be input into the equipment circuit or converting the direct current in the equipment circuit into the alternating current to be input into the alternating current circuit; under the condition that the target energy storage equipment is in a motion state, acquiring a current value of an equipment circuit and voltage drop values of a plurality of monitoring points in real time; respectively determining the real-time resistance of each of the plurality of monitoring points according to the current value and the plurality of voltage drop values; and under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, sending circuit early warning information, wherein the target early warning condition is determined according to the locus attribute of the target monitoring point. The method can detect the equipment state of the electrical equipment in the equipment circuit in real time under the condition that the target energy storage equipment is in a motion state, so as to determine whether the electrical equipment is in fault or not according to the equipment state determined in real time, and whether the electrical equipment is overlarge in resistance due to equipment aging and other reasons, so that the circuit safety problem of the circuit equipment is caused, the connection condition of the direct current loop connection point is maintained in time, and the problems of fault, functional failure and fire risk under extreme conditions caused by overlarge contact resistance (the real-time resistance) of the direct current loop connection point are avoided. The method solves the problem of low reliability of the monitoring method of the related equipment state, and improves the reliability of monitoring the equipment state.
As an optional implementation manner, before sending the circuit early warning information, the method further includes:
s1, sequentially acquiring site attributes of each of a plurality of monitoring points, wherein the site attributes comprise a first resistance value of a copper bar included in the monitoring point, a second resistance value of a component included in the monitoring point and a contact resistance value between the copper bar and the component;
s2, determining critical resistance values of each of the plurality of monitoring points according to the site attributes of each of the plurality of monitoring points;
s3, determining a target early warning condition according to the critical resistance value.
The first resistance value is a resistance value of the copper bar itself between a plurality of monitoring points (for example, between the first monitoring point and the second monitoring point), and may be determined according to parameters such as conductivity of the copper bar under different environmental temperatures, resistivity of the copper bar itself, and cross-sectional area of the copper bar, and the second resistance value is an internal resistance value of the component itself between a plurality of monitoring points (for example, between the first monitoring point and the second monitoring point).
In the step S2, determining the critical resistance value of each of the plurality of monitoring points according to the site attribute of each of the plurality of monitoring points includes: the sum of the first resistance value, the second resistance value, and the contact resistance value is determined as a critical resistance value, and the target early warning condition may be, but is not limited to, a target early warning condition that corresponds to each of the plurality of components included in the device circuit.
According to the embodiment of the application, the site attribute of each of the plurality of monitoring points is sequentially obtained, wherein the site attribute comprises a first resistance value of a copper bar included in the monitoring point, a second resistance value of a component included in the monitoring point and a contact resistance value between the copper bar and the component; determining critical resistance values of the monitoring points according to the site attributes of the monitoring points; and determining a target early warning condition according to the critical resistance value. The critical resistance value corresponding to the components can be determined according to different monitoring points and components among different monitoring points, so that different components are accurately monitored, and the accuracy of the monitoring method of the equipment state is improved.
As an optional implementation manner, the sequentially acquiring the location attribute of each of the plurality of monitoring points includes:
s1, acquiring a first temperature value of a copper bar and a second temperature value of a component included in a current monitoring point;
s2, determining a first resistance value of the copper bar according to the first temperature value, and determining a second resistance value of the component according to the second temperature value;
and S3, acquiring the connection torsion between the copper bar and the component, and determining the contact resistance value between the copper bar and the component according to the connection torsion.
It should be noted that, the first resistance value in S2 may be determined by the following formula one and formula two:
ρ=ρ1 (1+αΔt) formula two
Wherein R is the equivalent resistance value of the copper bar (i.e. the first resistance value), ρ is the resistivity of the conductor (the copper bar), and is determined by the material of the conductor, and meanwhile, the relationship between the resistivity and the temperature is the cross-sectional area of the conductor, as shown in the above formula two, ρ1 is the conductivity of the copper bar at the first temperature value, α is the temperature coefficient (i.e. the first temperature value), Δt is the variation of the temperature, the temperature coefficient of the resistance of the copper bar (also referred to as the temperature coefficient of the resistivity), and the resistance value of the conductor is not only related to the property of the material, but also affected by the temperature.
The second resistance value in S2 may be determined according to an internal resistance value in a device information table (e.g., a product specification) corresponding to the component before the component is put into use, or may be an accurate resistance value of the component at different operation moments measured in real time according to an ambient temperature where the component is located and a temperature generated by operation of the component itself.
The connection torque in S3 may be, but not limited to, a contact pressure, and the geothermal resistance may be determined by the following equation three:
where Rj is a contact resistance value between the copper bar and the component, F is a contact pressure between the bolt and the copper bar, the foregoing coefficients (i.e., 0.102) are different, m is a contact form (related to deformation of the contact surface) of the copper bar, m=0.5 in the case of point contact, m=1 in the case of surface contact, m=0.5 to 1 in the case of line contact, and generally about 0.7, K is understood as a constant or coefficient, and the specific value of K depends on experimental conditions (e.g., ambient temperature) and material characteristics (e.g., resistivity of the contact material and hardness of the contact material).
According to the embodiment of the application, the first temperature value of the copper bar and the second temperature value of the component, which are included in the current monitoring point, are obtained; determining a first resistance value of the copper bar according to the first temperature value, and determining a second resistance value of the component according to the second temperature value; and obtaining the connection torsion between the copper bar and the component, and determining the contact resistance value between the copper bar and the component according to the connection torsion. The first resistance value, the second resistance value and the contact resistance value can be accurately determined under the condition that the target energy storage equipment is in a motion state, so that the critical resistance value is accurately determined according to the first resistance value, the second resistance value and the contact resistance value, the problem of inaccurate monitoring results caused by inaccurate critical resistance values is avoided, and the accuracy of the monitoring results for monitoring the equipment state is improved.
As an optional implementation manner, before sending the circuit early warning information, the method further includes: and under the condition that the real-time resistance of the target detection point is larger than or equal to the critical resistance value, determining that the real-time resistance of the target monitoring point meets the target early warning condition. The method further comprises the following steps: under the condition that the real-time resistance of the target monitoring point is smaller than the critical resistance value and the resistance difference between the real-time resistance and the critical resistance is smaller than the preset difference threshold value, determining that the real-time resistance of the target monitoring point meets the reference early warning condition; and determining reference early warning information (namely the first circuit early warning information) corresponding to the components among the plurality of monitoring points according to the reference early warning conditions, wherein the reference early warning information is used for indicating that the equipment state of the components is close to an abnormal state.
By the implementation method, under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, before the circuit early warning information is sent, the real-time resistance of the target monitoring point is determined to meet the target early warning condition under the condition that the real-time resistance of the target monitoring point is larger than or equal to the critical resistance value. The method has the advantages that whether the resistance value of the implementation resistor exceeds the critical resistance value is determined rapidly through the relation between the real-time resistor and the critical resistance value, and the device state can be determined to be in an abnormal state under the condition that the resistance value exceeds the critical resistance value, so that a user needs to be prompted to process in time. Therefore, by detecting the equipment state of the equipment, the equipment state of the components in the equipment circuit is ensured to be in a normal state for a long time, and the circuit safety of the equipment circuit is improved.
As an optional implementation manner, in the case that the real-time resistance of the target monitoring point of the plurality of monitoring points meets the target early warning condition, the sending circuit early warning information includes:
s1, generating circuit early warning information according to monitoring marks of target monitoring points;
s2, sending circuit early warning information.
It should be noted that, after a plurality of monitoring points are arranged in the device circuit according to the monitoring identifier, the plurality of monitoring points are marked to generate monitoring identifiers corresponding to the plurality of monitoring points, so that circuit early warning information can be generated according to the monitoring identifiers of the target monitoring points; it can be understood that, in order to accurately determine the abnormal component under the condition that the state of the component is abnormal, a plurality of components included in the equipment circuit of the target energy storage equipment can be marked before the monitoring method of the equipment state is implemented (or before the target energy storage equipment is put into use), so as to obtain equipment identifiers corresponding to the components, and further, under the condition that the test resistance of the target monitoring point meets the target early warning condition, circuit early warning information can be generated according to the monitoring identifiers and the equipment identifiers.
In this embodiment, after the circuit early warning information is sent, in order to accurately ensure the safety of the device circuit, the power supply in the target energy storage device may be disconnected in time, so as to ensure the safety of the device circuit.
Through the implementation mode of the method, the circuit early warning information is generated according to the monitoring mark of the target monitoring point; the method for sending the circuit early warning information can enable a user to quickly lock the abnormal monitoring point and the equipment with abnormal state after the circuit early warning information is sent, so that after the power supply in the equipment circuit is cut off, the abnormal equipment is trimmed or replaced, the target energy storage equipment can be effectively utilized in the same time under the condition that the target energy storage equipment is required to work urgently, and the utilization rate of the target energy storage equipment is improved.
As an optional implementation manner, after the sending the circuit early warning information, at least one of the following steps is further included:
s1, responding to a target control instruction, and cutting off a device circuit;
s2, cutting off the equipment circuit when the current value is smaller than or equal to the target threshold value.
It should be noted that, the target control instruction in S1 may be a control instruction sent by a user through the terminal device 101 shown in fig. 1 to cut off the device circuit or disconnect the power supply in the device circuit, and in the case where the real-time resistance is smaller than the critical resistance value and the resistance difference between the real-time resistance and the critical resistance is smaller than the preset threshold value in the case where the user needs to repair or replace a connection line (such as a copper bar) or a component in the device circuit, the user may input the target control instruction on the terminal device by himself, thereby cutting off the device circuit. The operation in S2 above may be understood, but is not limited to, that in the case where the current value is less than or equal to the target threshold value, the device circuit is automatically shut off without waiting for the monitoring result of the real-time resistance.
With the above-described embodiments of the present application, the device circuit is shut off in response to the target control instruction; direct contact between a user and a device circuit is reduced, and safety of the user is protected; in the case where the current value is less than or equal to the target threshold value, the device is cut off from short circuit. The device circuit can be cut off in time under the condition of finding out abnormal current without waiting for the monitoring result of the device state, so that the device circuit is protected in time, and the safety of the device circuit is improved.
The following describes a complete implementation process of the present application with reference to fig. 4, where the above-mentioned method for monitoring an equipment state may be applied to an energy storage control busbar (which may be used as the above-mentioned target energy storage device), where the main components on the dc side of the energy storage control busbar include components such as a battery pack, a fuse, a dc load switch, a sensor, a PCS and a connection copper bar, and the existing control energy storage control busbar has functions of busbar, splitting and combining loop, insulation and metering detection, but there is no monitoring function for detecting a contact condition of the copper bar with an electrical device connection point.
As can be seen from fig. 4, each of the battery packs 401 and the high-voltage boxes 402 includes a plurality of battery packs 401 connected in series or in parallel as required, one battery pack 401 corresponds to one high-voltage box 402, the high-voltage box 402 is used for controlling the switch and the current and the voltage of the battery pack 401 according to the control command sent by the BMS403, the layout unit included in the monitoring device 404 of the above device state lays a plurality of monitoring points (including a first monitoring point, a second monitoring point, a third monitoring point, a fourth monitoring point, a fifth monitoring point and a sixth monitoring point) as shown in fig. 4 in the device circuit, and when the target energy storage device is in an operating state, for example, after the BMS403 collects and calculates parameters such as the voltage, the current, the temperature, etc., the control command generated according to the calculation result is sent to the high-voltage box 402, so as to control the discharging network 411 side of the battery pack 401 to use, and the current detection unit included in the monitoring device 404 of the device state as shown in fig. 4 indirectly measures the current value of the current carrying conductor (for example, such as copper bar) by measuring the magnitude of the potential of the hall sensor 405; the voltage drop detection unit included in the device state monitoring apparatus 404 shown in fig. 4 detects the voltage drop values of the first to sixth monitoring points, determines the real-time resistance of each monitoring point according to the current value and the voltage drop values of the plurality of monitoring points, generates circuit early-warning information according to the comparison result of the real-time resistance and the critical resistance value, and uploads the circuit early-warning information to the EMS406 shown in fig. 4, where the EMS406 may send the circuit early-warning information to the terminal device 407 shown in fig. 4, so as to monitor the device state.
When the voltage drop detection unit included in the device state monitoring apparatus 404 detects the voltage drops of the plurality of monitoring points, the voltage drop between the first monitoring point and the second monitoring point, the voltage drop between the second monitoring point and the third monitoring point, the voltage drop between the fourth monitoring point and the fifth monitoring point, and the voltage drop between the fifth monitoring point and the sixth monitoring point may be detected; the current detection unit included in the device state monitoring apparatus 404 is configured to measure the current in the loop (device circuit), so as to calculate the magnitude of the contact resistance (real-time resistance) according to the detected voltage drop and the real-time current, and then, determine whether the contact resistance (real-time resistance) exceeds a limit value by combining with a flexibly set critical resistance value, determine whether the connection of each electrical component (element) is reliable, and if the connection exceeds the limit value, send an alarm (the circuit early warning information), cut off the loop through the BMS403, and upload the data to the terminal device 407 through the BMS403 and the EMS 406.
The BMS403 shown in fig. 4 is an electronic device for monitoring and managing the battery pack 401, and further controls the charging and discharging processes of the battery by collecting and calculating parameters such as voltage, current, temperature, SOC, etc., so as to protect the battery and improve the comprehensive performance of the battery. The above-mentioned monitoring method of the device state of the present application may utilize the BMS403 to control the high voltage box 402 in the implementation process, so as to implement the disconnection of the device circuit. The EMS406 shown in fig. 4 is an advanced technology aimed at helping a user efficiently manage energy consumption and storage. The EMS406 provides a more sustainable, economical and environment-friendly energy management solution by monitoring, analyzing and optimizing energy flows, and the monitoring method of the device state of the present application mainly uses the monitoring function of the EMS406 to upload detected data and alarm information to the terminal device 407, so as to facilitate the management and maintenance of the device.
In the process of implementing the above-mentioned method for monitoring the equipment state by using the above-mentioned monitoring device for equipment state, the dc surge protector 408 shown in fig. 4 turns the high voltage in the equipment circuit to low voltage for protecting the components in the equipment circuit, so as to avoid the damage to the components in the equipment circuit caused by environmental factors (such as lightning); the current conversion device 409 shown in fig. 4 is used for converting a direct current point in a device circuit into an alternating current flowing to the power grid 411 in a process of flowing a direct current emitted by the battery pack to the power grid 411, and the alternating current surge protector 410 shown in fig. 4 is used for protecting components on the power grid side from damage caused by environmental factors (such as lightning) and the like.
Note that, the current conversion device 409 may be an energy storage converter (PCS): a bidirectional DC/AC inverter; the PCS (energy storage converter; english translation: power Conversion System) can control the charging and discharging processes of the storage battery to perform AC/DC conversion, and can directly supply power to the AC load under the condition of no power grid. The PCS is composed of a DC/AC bidirectional converter, a control unit and the like. The PCS controller receives a background control instruction through communication, and controls the converter to charge or discharge the battery according to the sign and the size of the power instruction, so that the active power and the reactive power of the power grid are regulated. The PCS controller communicates with a BMS (power battery management system) through a CAN interface (a transmission form of information) to acquire the state information of the battery pack, so that the battery CAN be charged and discharged in a protective way, and the running safety of the battery is ensured.
As another example, in the process that the target energy storage device is in an operating state, for example, the grid 411 side discharges to charge the battery pack 401, the BMS403 may send a control instruction generated according to a calculation result to the high-voltage box 402 after collecting and calculating parameters such as voltage, current, temperature, etc., so as to control the battery pack 401 to charge and store energy, at this time, the current flow emitted by the grid 411 should be leftward (opposite to the current flow flowing to the grid 411 as shown in fig. 4), and in the process that the grid 411 discharges to charge the battery pack 401, the current detection unit included in the device state monitoring apparatus 404 as shown in fig. 4 may still indirectly measure the current value of the current carrying conductor (for example, copper bar) by measuring the potential of the hall sensor 405; the voltage drop detection unit included in the device state monitoring apparatus 404 shown in fig. 4 detects the voltage drop values of the first to sixth monitoring points, determines the real-time resistance of each monitoring point according to the current value and the voltage drop values of the plurality of monitoring points, generates circuit early-warning information according to the comparison result of the real-time resistance and the critical resistance value, and uploads the circuit early-warning information to the EMS406 shown in fig. 4, where the EMS406 may send the circuit early-warning information to the terminal device 407 shown in fig. 4, so as to monitor the device state.
Similarly, the dc surge protector 408 and the ac surge protector 410 shown in fig. 4 still function as components in the protection circuit, and the current conversion device 409 shown in fig. 4 converts the ac current flowing out of the power grid 411 into the dc current at this time, so as to charge the battery pack 401.
According to the embodiment of the application, the method for monitoring the contact resistance of the target energy storage device in the operation process is mainly used, the connection condition of the key connection part can be converted into running of a contact resistance value, data can be uploaded to the detection end, the internal device circuit in the energy storage device of a user and components in the device circuit can be conveniently monitored and maintained, the method for monitoring the device circuit of the application is used for collecting voltage drops of two monitoring points, then collecting current in a direct-current loop, calculating resistance (the real-time resistance) between the two monitoring points through ohm law, the resistance is the contact resistance between the two points, and comparing the real-time resistance with the contact resistance value calculated by theory or the contact resistance value (namely the critical resistance value) under the condition of qualified actual temperature rise test to judge whether the connection condition of the two monitoring points is normal. If the measured real-time resistance is smaller than the critical resistance value, uploading the monitoring qualified data, and if the measured real-time resistance is larger than or equal to the critical resistance value, uploading the monitoring unqualified data and prompting the alarm information.
The method for monitoring the equipment state in the energy storage control convergence cabinet can effectively monitor the contact resistance of each connection point of the direct current side loop of the energy storage control convergence cabinet in use, effectively monitor the influence condition of field equipment on the contact resistance due to factors such as corrosion, aging, temperature change, torsion decay and the like, and accordingly timely maintain the connection condition of the connection point of the direct current loop, and avoid faults, functional failure and fire risks in extreme cases caused by overlarge contact resistance of the connection point of the direct current loop. Meanwhile, in the process of implementing the method for monitoring the equipment state, the real-time data transmission background can be used for facilitating operation and maintenance personnel to monitor the running condition of the field equipment, and work tasks of the operation and maintenance personnel are reduced.
It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.
According to another aspect of the embodiment of the present invention, there is also provided a device for monitoring a device state for implementing the method for monitoring a device state described above. As shown in fig. 5, the apparatus includes:
the layout unit 502 is configured to layout a plurality of monitoring points in a device circuit between a battery pack and a current conversion device, where the device circuit is a dc circuit, the current conversion device is connected to an ac circuit of an alternating power grid, the battery pack is configured to perform a storage operation or a release operation on dc in the device circuit, and the current conversion device is configured to convert ac in the ac circuit into dc to be input into the device circuit, or to convert dc in the device circuit into ac to be input into the ac circuit;
an obtaining unit 504, configured to obtain, in real time, a current value of a device circuit and a voltage drop value of each of a plurality of monitoring points when the target energy storage device is in an operating state;
the determining unit 506 is configured to determine respective real-time resistances of the plurality of monitoring points according to the current value and the plurality of voltage drop values;
and the sending unit 508 is configured to send circuit early warning information when the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, where the target early warning condition is determined according to a site attribute of the target monitoring point.
Alternatively, in this embodiment, the embodiments to be implemented by each unit module may refer to the embodiments of each method described above, which are not described herein again.
According to still another aspect of the embodiment of the present invention, there is also provided an electronic device for implementing the method for monitoring a device status as described above, where the electronic device may be a terminal device or a server as shown in fig. 6. The present embodiment is described taking the electronic device as a terminal device as an example. As shown in fig. 6, the electronic device comprises a memory 602 and a processor 604, the memory 602 having stored therein a computer program, the processor 604 being arranged to perform the steps of any of the method embodiments described above by means of the computer program.
Alternatively, in this embodiment, the electronic device may be located in at least one network device of a plurality of network devices of the computer network.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, arranging a plurality of monitoring points in an equipment circuit between a battery pack and a current conversion device, wherein the equipment circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the equipment circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into direct current to be input into the equipment circuit or converting direct current in the equipment circuit into alternating current to be input into the alternating current circuit;
S2, under the condition that the target energy storage equipment is in an operating state, acquiring a current value of an equipment circuit and voltage drop values of a plurality of monitoring points in real time;
s3, respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and S4, under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, sending circuit early warning information, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
Alternatively, it will be understood by those skilled in the art that the structure shown in fig. 6 is only schematic, and the electronic device may also be a terminal device such as a smart phone (e.g. an Android phone, an iOS phone, etc.), a tablet computer, a palm computer, and a mobile internet device (Mobile Internet Devices, MID), a PAD, etc. Fig. 6 is not limited to the structure of the electronic device described above. For example, the electronic device may also include more or fewer components than shown in FIG. 6, or have a different configuration than shown in FIG. 6.
The memory 602 may be used to store software programs and modules, such as program instructions/modules corresponding to the method and apparatus for monitoring a device state in the embodiment of the present invention, and the processor 604 executes the software programs and modules stored in the memory 602, thereby executing various functional applications and data processing, that is, implementing the method for monitoring a device state as described above. The memory 602 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 602 may further include memory located remotely from processor 604, which may be connected to the terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof. The memory 602 may be used to store, but is not limited to, file information such as a target logical file. As an example, as shown in fig. 6, the above-mentioned memory 602 may include, but is not limited to, the layout unit 502, the acquisition unit 504, the determination unit 506, and the transmission unit 508 in the monitoring apparatus including the above-mentioned device status. In addition, other module units in the monitoring device of the device status may be included, but are not limited to, and are not described in detail in this example.
Optionally, the transmission device 606 is used to receive or transmit data via a network. Specific examples of the network described above may include wired networks and wireless networks. In one example, the transmission device 606 includes a network adapter (Network Interface Controller, NIC) that may be connected to other network devices and routers via a network cable to communicate with the internet or a local area network. In one example, the transmission device 606 is a Radio Frequency (RF) module for communicating wirelessly with the internet.
In addition, the electronic device further includes: a display 608, and a connection bus 610 for connecting the various modular components of the electronic device.
According to one aspect of the present application, a computer program product is provided, comprising a computer program/instructions containing program code for performing the method shown in the flow chart. In such embodiments, the computer program may be downloaded and installed from a network via a communication portion, and/or installed from a removable medium. When executed by a central processing unit, performs the various functions provided by the embodiments of the present application.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
According to one aspect of the present application, there is provided a computer-readable storage medium, from which a processor of a computer device reads the computer instructions, the processor executing the computer instructions, so that the computer device performs the above-mentioned method of monitoring a device state.
Alternatively, in the present embodiment, the above-described computer-readable storage medium may be configured to store a computer program for performing the steps of:
s1, arranging a plurality of monitoring points in an equipment circuit between a battery pack and a current conversion device, wherein the equipment circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the equipment circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into direct current to be input into the equipment circuit or converting direct current in the equipment circuit into alternating current to be input into the alternating current circuit;
s2, under the condition that the target energy storage equipment is in an operating state, acquiring a current value of an equipment circuit and voltage drop values of a plurality of monitoring points in real time;
S3, respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and S4, under the condition that the real-time resistance of the target monitoring point in the plurality of monitoring points meets the target early warning condition, sending circuit early warning information, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
Alternatively, in this embodiment, it will be understood by those skilled in the art that all or part of the steps in the methods of the above embodiments may be performed by a program for instructing a terminal device to execute the steps, where the program may be stored in a computer readable storage medium, and the storage medium may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic or optical disk, and the like.
The integrated units in the above embodiments may be stored in the above-described computer-readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing one or more computer devices (which may be personal computers, servers or network devices, etc.) to perform all or part of the steps of the above-described method of the various embodiments of the present invention.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In several embodiments provided in the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the above, is merely a logical function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (11)

1. A method for monitoring a status of a device, comprising:
arranging a plurality of monitoring points in a device circuit between a battery pack and a current conversion device, wherein the device circuit is a direct current circuit, the current conversion device is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion device is used for converting alternating current in the alternating current circuit into the direct current to be input into the device circuit or converting the direct current in the device circuit into the alternating current to be input into the alternating current circuit;
Under the condition that the target energy storage equipment is in an operating state, acquiring a current value of the equipment circuit and voltage drop values of a plurality of monitoring points in real time;
respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, sending circuit early warning information, wherein the target early warning condition is determined according to the position attribute of the target monitoring point.
2. The method of claim 1, wherein the sending circuit pre-warning information is preceded by the real-time resistance of a target monitoring point of the plurality of monitoring points satisfying a target pre-warning condition, further comprising:
sequentially acquiring the site attribute of each of a plurality of monitoring points, wherein the site attribute comprises a first resistance value of a copper bar included in the monitoring point, a second resistance value of a component included in the monitoring point, and a contact resistance value between the copper bar and the component;
determining critical resistance values of each of the plurality of monitoring points according to the site attributes of each of the plurality of monitoring points;
And determining the target early warning condition according to the critical resistance value.
3. The method of claim 2, wherein sequentially obtaining the location attributes for each of the plurality of monitoring points comprises:
acquiring a first temperature value of the copper bar and a second temperature value of the component, which are included in the current detection point;
determining the first resistance value of the copper bar according to the first temperature value, and determining the second resistance value of the component according to the second temperature value;
and acquiring the connection torsion between the copper bar and the component, and determining the contact resistance value between the copper bar and the component according to the connection torsion.
4. The method of claim 2, wherein the routing a plurality of monitoring points in the device circuit between the battery pack and the current conversion device comprised by the target energy storage device comprises at least one of:
determining a fusing unit included in the device circuit as a first monitoring point;
and determining a load switch unit included in the equipment circuit as a second monitoring point.
5. The method of claim 2, wherein, in the case where the real-time resistance of a target monitoring point of the plurality of monitoring points satisfies a target early warning condition, before sending the circuit early warning information, further comprising:
And under the condition that the real-time resistance of the target monitoring point is larger than or equal to the critical resistance value, determining that the real-time resistance of the target monitoring point meets the target early warning condition.
6. The method of claim 1, wherein transmitting circuit warning information if the real-time resistance of a target monitoring point of the plurality of monitoring points meets a target warning condition comprises:
generating the circuit early warning information according to the monitoring identification of the target monitoring point;
and sending the circuit early warning information.
7. The method of claim 6, further comprising, after transmitting the circuit alert information, at least one of:
shutting down the device circuitry in response to a target control instruction;
and cutting off the equipment circuit when the current value is less than or equal to a target threshold value.
8. A device for monitoring a status of an apparatus, comprising:
the device comprises a layout unit, a storage unit and a current conversion unit, wherein the layout unit is used for laying a plurality of monitoring points in a device circuit between a battery pack and the current conversion unit, the device circuit is a direct current circuit, the current conversion unit is connected with an alternating current circuit of an alternating power grid, the battery pack is used for carrying out storage operation or release operation on direct current in the device circuit, and the current conversion unit is used for converting alternating current in the alternating current circuit into the direct current to be input into the device circuit or converting the direct current in the device circuit into the alternating current to be input into the alternating current circuit;
The acquisition unit is used for acquiring the current value of the equipment circuit and the voltage drop value of each of the plurality of monitoring points in real time under the condition that the target energy storage equipment is in an operating state;
the determining unit is used for respectively determining the real-time resistance of each of the monitoring points according to the current value and the voltage drop values;
and the sending unit is used for sending circuit early warning information under the condition that the real-time resistance of a target monitoring point in the plurality of monitoring points meets a target early warning condition, wherein the target early warning condition is determined according to the site attribute of the target monitoring point.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program, when run, performs the method of any one of claims 1 to 7.
10. A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 7.
11. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to execute the method according to any of the claims 1 to 7 by means of the computer program.
CN202311478154.7A 2023-11-07 2023-11-07 Method and device for monitoring equipment state Pending CN117607572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311478154.7A CN117607572A (en) 2023-11-07 2023-11-07 Method and device for monitoring equipment state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311478154.7A CN117607572A (en) 2023-11-07 2023-11-07 Method and device for monitoring equipment state

Publications (1)

Publication Number Publication Date
CN117607572A true CN117607572A (en) 2024-02-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
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