CN117879179A - Electrical equipment abnormal power state monitoring method and system - Google Patents
Electrical equipment abnormal power state monitoring method and system Download PDFInfo
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- CN117879179A CN117879179A CN202410270555.1A CN202410270555A CN117879179A CN 117879179 A CN117879179 A CN 117879179A CN 202410270555 A CN202410270555 A CN 202410270555A CN 117879179 A CN117879179 A CN 117879179A
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- 238000007781 pre-processing Methods 0.000 claims abstract description 12
- 238000004590 computer program Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 5
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Abstract
The application provides a method and a system for monitoring abnormal power states of electrical equipment, wherein the method comprises the following steps: collecting first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data; determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data; determining a power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment; judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment. According to the technical scheme, potential faults of the equipment can be found in time, timely early warning and preventive maintenance can be carried out, the service life of the equipment is prolonged, and unexpected downtime is reduced.
Description
Technical Field
The application relates to the technical field of abnormal power monitoring, in particular to a method and a system for monitoring an abnormal power state of electrical equipment.
Background
In an electrical power system, the power of electrical equipment is an important monitored parameter. When an abnormality occurs in the power of the device, a malfunction of the device or a problem of the power system may be predicted. Therefore, the power of the electrical equipment is monitored in real time, and the method has important significance for guaranteeing the stability and reliability of the power system. However, in the prior art, when determining the power of the electrical equipment, the power needs to be judged by combining a phasor diagram, a tide direction, load properties and a power factor angle, the process is complex, the power state monitoring precision of the electrical equipment is low, and abnormal power of the electrical equipment cannot be found in time, so that the service life of the electrical equipment is low and the unexpected shutdown time is long.
Disclosure of Invention
The application provides a method and a system for monitoring an abnormal power state of electrical equipment, which are used for at least solving the technical problem of low monitoring precision of the power state of the electrical equipment.
An embodiment of a first aspect of the present application proposes a method for monitoring an abnormal power state of an electrical device, the method comprising:
collecting first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data;
determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data;
determining a power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment;
judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment.
Preferably, the first monitoring data includes: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
Further, the preprocessing the first monitoring data and the second monitoring data includes:
and deleting the null value, the abnormal value, the zero-indicating voltage value and the zero-indicating current value in the first monitoring data and the second monitoring data.
Further, the first angle of the electrical device is calculated as follows:
the second angle of the electrical device is calculated as follows:
in the method, in the process of the invention,for a first angle of the electrical device, +.>For the first active power, < >>For the first voltage value, +.>For the first current value, +.>For the first passive power, +.>For a second angle of the electrical device, +.>For the second active power, +.>For the second voltage value, +.>For the second current value, +.>Is the second reactive power.
Preferably, the determining the power factor angle of the electrical device at the current moment according to the first angle and the second angle of the electrical device includes:
and obtaining the sum of the first angle and the second angle, and taking the sum of the first angle and the second angle as the power factor angle of the electrical equipment at the current moment.
Preferably, the determining whether the power state of the electrical device at the current moment is abnormal according to the power factor angle of the electrical device includes:
judging whether the power factor angle of the electrical equipment is within a preset angle range, if so, judging that the power state of the electrical equipment at the current moment is normal, otherwise, judging that the power state of the electrical equipment at the current moment is abnormal.
An embodiment of a second aspect of the present application proposes an abnormal power state monitoring system for an electrical device, including:
the acquisition module is used for acquiring first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data;
the first determining module is used for determining a first angle of the electrical equipment according to the preprocessed first monitoring data and determining a second angle of the electrical equipment according to the preprocessed second monitoring data;
the second determining module is used for determining the power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment;
and the judging module is used for judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment.
Preferably, the first monitoring data includes: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
An embodiment of a third aspect of the present application provides an electronic device, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as described in the embodiments of the first aspect when the program is executed.
An embodiment of a fourth aspect of the present application proposes a computer readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements a method according to an embodiment of the first aspect.
The technical scheme provided by the embodiment of the application at least brings the following beneficial effects:
the application provides a method and a system for monitoring abnormal power states of electrical equipment, wherein the method comprises the following steps: collecting first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data; determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data; determining a power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment; judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment. According to the technical scheme, potential faults of the equipment can be found in time, timely early warning and preventive maintenance can be carried out, the service life of the equipment is prolonged, and unexpected downtime is reduced.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a flow chart of a method for monitoring abnormal power conditions of an electrical device according to one embodiment of the present application;
fig. 2 is a block diagram of an abnormal power state monitoring system for an electrical device according to one embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The application provides a method and a system for monitoring abnormal power states of electrical equipment, wherein the method comprises the following steps: collecting first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data; determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data; determining a power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment; judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment. According to the technical scheme, potential faults of the equipment can be found in time, timely early warning and preventive maintenance can be carried out, the service life of the equipment is prolonged, and unexpected downtime is reduced.
An abnormal power state monitoring method and system for an electrical device according to an embodiment of the present application are described below with reference to the accompanying drawings.
Example 1
Fig. 1 is a flowchart of a method for monitoring abnormal power states of electrical equipment according to an embodiment of the present application, as shown in fig. 1, the method includes:
step 1: and acquiring first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data. The first power transmitter and the second power transmitter arranged at the preset position of the electrical equipment can be the first power transmitter and the second power transmitter arranged in any two phases of three phases of the electrical equipment A, B, C.
In an embodiment of the disclosure, the first monitoring data includes: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
Wherein, the preprocessing the first monitoring data and the second monitoring data includes:
and deleting the null value, the abnormal value, the zero-indicating voltage value and the zero-indicating current value in the first monitoring data and the second monitoring data.
Step 2: and determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data.
In an embodiment of the disclosure, the calculation formula of the first angle of the electrical device is as follows:
the second angle of the electrical device is calculated as follows:
in the method, in the process of the invention,for a first angle of the electrical device, +.>For the first active power, < >>For the first voltage value, +.>For the first current value, +.>For the first passive power, +.>For a second angle of the electrical device, +.>For the second active power, +.>For the second voltage value, +.>For the second current value, +.>For a second reactive power, wherein +.>In particular the angle between the voltage, current monitored by the first power transmitter, +.>In particular the angle between the voltage and the current monitored by the second power transmitter.
In particular, the method comprises the steps of,is->The size can be according to->、/>、/>Is->、/>、/>Calculated out->Is->Positive and negative can pass->、/>Positive and negative value judgment, namely:
step 3: and determining the power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment.
In an embodiment of the present disclosure, the step 3 specifically includes:
and obtaining the sum of the first angle and the second angle, and taking the sum of the first angle and the second angle as the power factor angle of the electrical equipment at the current moment.
In particular, the method comprises the steps of,is->Advance ahead of->Is (are) angle of->Is->Hysteresis->Is a function of the angle of (a). Wherein: />、/>Is->、/>Respectively isU 1 、/>Is->、/>Vector form. From the power data measured by the power transmitter, a +.>、/>Data to obtain the power factor angle +.>Data, for example, can use the formula +.>Determining the power factor angle->。
Step 4: judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment.
In the embodiment of the present disclosure, the step 4 specifically includes:
judging whether the power factor angle of the electrical equipment is within a preset angle range, if so, judging that the power state of the electrical equipment at the current moment is normal, otherwise, judging that the power state of the electrical equipment at the current moment is abnormal; wherein the preset angle range may be。
The power factor angle is as followsφ 0 Judgment is carried out, and the conditions are divided into 6 cases according to 0 degree, 60 degree, 120 degree, 180 degree, 240 degree and 300 degree, wherein60 degrees is normal power, and other angles are abnormal power. But considering special cases of unbalanced three-phase load, insufficient power accuracy collected by a power transmitter and the like, the above 6 angles are respectively extended forwards and rightwards by 30 degrees to form respective angle ranges: when->The power of the electrical equipment is normal, the equipment can normally operate, the rest angles are abnormal power, and shutdown check is needed.
In summary, the method for monitoring the abnormal power state of the electrical equipment provided by the embodiment can timely discover potential faults of the equipment, timely early warning and preventive maintenance are performed, the service life of the equipment is prolonged, and unexpected downtime is reduced.
Example two
Fig. 2 is a block diagram of an abnormal power state monitoring system for an electrical device according to one embodiment of the present application, as shown in fig. 2, the system includes:
the acquisition module 100 is configured to acquire first monitoring data and second monitoring data of an electrical device at a current moment by using a first power transmitter and a second power transmitter that are arranged at preset positions of the electrical device, and perform preprocessing on the first monitoring data and the second monitoring data; the first power transmitter and the second power transmitter arranged at the preset position of the electrical equipment can be the first power transmitter and the second power transmitter arranged in any two phases of three phases of the electrical equipment A, B, C.
A first determining module 200, configured to determine a first angle of the electrical device according to the first preprocessed monitored data, and determine a second angle of the electrical device according to the second preprocessed monitored data;
a second determining module 300, configured to determine a power factor angle of the electrical device at a current moment according to the first angle and the second angle of the electrical device;
and the judging module 400 is used for judging whether the power state of the electrical equipment at the current moment is abnormal according to the power factor angle of the electrical equipment.
In an embodiment of the disclosure, the first monitoring data includes: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
Wherein, the acquisition module 100 is further configured to:
and deleting the null value, the abnormal value, the zero-indicating voltage value and the zero-indicating current value in the first monitoring data and the second monitoring data.
Further, the first angle of the electrical device is calculated as follows:
the second angle of the electrical device is calculated as follows:
in the method, in the process of the invention,for a first angle of the electrical device, +.>For the first active power, < >>For the first voltage value, +.>For the first current value, +.>For the first passive power, +.>For a second angle of the electrical device, +.>For the second active power, +.>For the second voltage value, +.>For the second current value, +.>Is the second reactive power.
In an embodiment of the present disclosure, the second determining module 300 is further configured to:
and obtaining the sum of the first angle and the second angle, and taking the sum of the first angle and the second angle as the power factor angle of the electrical equipment at the current moment.
In an embodiment of the present disclosure, the determining module 400 is further configured to:
judgment stationJudging whether the power factor angle of the electrical equipment is within a preset angle range, if so, judging that the power state of the electrical equipment at the current moment is normal, otherwise, judging that the power state of the electrical equipment at the current moment is abnormal; wherein the preset angle range may be。
The power factor angle is as followsφ 0 Judgment is carried out, and the conditions are divided into 6 cases according to 0 degree, 60 degree, 120 degree, 180 degree, 240 degree and 300 degree, wherein60 degrees is normal power, and other angles are abnormal power. But considering special cases of unbalanced three-phase load, insufficient power accuracy collected by a power transmitter and the like, the above 6 angles are respectively extended forwards and rightwards by 30 degrees to form respective angle ranges: when->The power of the electrical equipment is normal, the equipment can normally operate, the rest angles are abnormal power, and shutdown check is needed.
In summary, the system for monitoring the abnormal power state of the electrical equipment provided by the embodiment can timely discover potential faults of the equipment, timely early warning and preventive maintenance are performed, the service life of the equipment is prolonged, and unexpected downtime is reduced.
Example III
In order to achieve the above embodiments, the present disclosure further proposes an electronic device including: a memory, a processor, and a computer program stored on the memory and executable on the processor, which when executed, implements the method as described in embodiment one.
Example IV
In order to implement the above-described embodiments, the present disclosure also proposes a computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, implements a method as described in embodiment one.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. A method of monitoring an abnormal power condition of an electrical device, the method comprising:
collecting first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data;
determining a first angle of the electrical equipment according to the preprocessed first monitoring data, and determining a second angle of the electrical equipment according to the preprocessed second monitoring data;
determining a power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment;
judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment.
2. The method of claim 1, wherein the first monitoring data comprises: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
3. The method of claim 2, wherein the preprocessing the first and second monitoring data comprises:
and deleting the null value, the abnormal value, the zero-indicating voltage value and the zero-indicating current value in the first monitoring data and the second monitoring data.
4. The method of claim 2, wherein the first angle of the electrical device is calculated as:
the second angle of the electrical device is calculated as follows:
in the method, in the process of the invention,for a first angle of the electrical device, +.>For the first active power, < >>For the first voltage value, +.>For the first current value, +.>For the first passive power, +.>For a second angle of the electrical device, +.>For the second active power, +.>At the value of the second voltage,for the second current value, +.>Is the second reactive power.
5. The method of claim 1, wherein determining the power factor angle of the electrical device at the current time based on the first angle and the second angle of the electrical device comprises:
and obtaining the sum of the first angle and the second angle, and taking the sum of the first angle and the second angle as the power factor angle of the electrical equipment at the current moment.
6. The method of claim 1, wherein said determining whether the power state of the electrical device at the current time is abnormal based on the power factor angle of the electrical device comprises:
judging whether the power factor angle of the electrical equipment is within a preset angle range, if so, judging that the power state of the electrical equipment at the current moment is normal, otherwise, judging that the power state of the electrical equipment at the current moment is abnormal.
7. An electrical device abnormal power condition monitoring system, the system comprising:
the acquisition module is used for acquiring first monitoring data and second monitoring data of the electrical equipment at the current moment by using a first power transmitter and a second power transmitter which are arranged at preset positions of the electrical equipment, and preprocessing the first monitoring data and the second monitoring data;
the first determining module is used for determining a first angle of the electrical equipment according to the preprocessed first monitoring data and determining a second angle of the electrical equipment according to the preprocessed second monitoring data;
the second determining module is used for determining the power factor angle of the electrical equipment at the current moment according to the first angle and the second angle of the electrical equipment;
and the judging module is used for judging whether the power state of the electrical equipment at the current moment is abnormal or not according to the power factor angle of the electrical equipment.
8. The system of claim 7, wherein the first monitoring data comprises: the first voltage value, the first current value, the first active power and the first active power of the electrical equipment are acquired by the first power transmitter;
the second monitoring data includes: and the second power transmitter acquires a second voltage value, a second current value, second active power and second reactive power of the electrical equipment.
9. An electronic device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which processor implements the method according to any of claims 1-6 when executing the program.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any of claims 1-6.
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| CN202410270555.1A CN117879179A (en) | 2024-03-11 | 2024-03-11 | Electrical equipment abnormal power state monitoring method and system |
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