CN113777434A - Fault monitoring method and device and power supply and distribution system - Google Patents
Fault monitoring method and device and power supply and distribution system Download PDFInfo
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- CN113777434A CN113777434A CN202111122848.8A CN202111122848A CN113777434A CN 113777434 A CN113777434 A CN 113777434A CN 202111122848 A CN202111122848 A CN 202111122848A CN 113777434 A CN113777434 A CN 113777434A
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Abstract
The invention discloses a fault monitoring method and device and a power supply and distribution system. Wherein, the method comprises the following steps: applied to a power supply and distribution system, comprising: acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of electric equipment; and judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment. By the aid of the method and the device, the problem of error identification caused by signal disturbance or frequency interference can be avoided, and accuracy of fault identification is improved.
Description
Technical Field
The invention relates to the technical field of electronic power, in particular to a fault monitoring method and device and a power supply and distribution system.
Background
In a power supply and distribution system, direct current arc faults can be caused under various conditions that construction quality is not over-critical, bolts are not screwed down, connecting parts such as terminals, connector lugs and fuses are loosened, connecting positions of the terminals are oxidized, insulativity of connecting wires or cables is reduced, and insulation of equipment is poor.
For the detection of the direct current arc fault, at present, researchers at home and abroad mainly collect current signals, analyze and judge the current signals through time-frequency domain analysis and processing, but under the direct current ecology of an energy internet, in a source-storage-network-load integrated system formed by an alternating current power grid, a photovoltaic power generation device, an energy storage device and direct current electric equipment, chopper modulation, frequency conversion control and the like of a high-speed power electronic switching device are widely applied, and under the influence of complex internal and external environment, the current signals are easy to generate signal disturbance or frequency interference, so that the fault arc is identified by mistake, and the accuracy of the direct current arc fault identification is reduced.
Aiming at the problems that false alarm is easy to generate and the accuracy rate is low when the direct current arc fault is identified by collecting current signals in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a fault monitoring method, a fault monitoring device and a power supply and distribution system, and aims to solve the problems that false alarm is easily generated and the accuracy is low when a direct current arc fault is identified by acquiring a current signal in the prior art.
In order to solve the technical problem, the invention provides a fault monitoring method, which is applied to a power supply and distribution system and comprises the following steps:
acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of electric equipment;
and judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
Further, acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of a power utilization device includes:
acquiring a voltage value of the power supply bus and a voltage value of the electric equipment according to a preset sampling period;
processing the voltage value of the power supply bus, and determining the voltage characteristic value of the power supply bus in each sampling period as the voltage data of the power supply bus; and processing the voltage value of the electric equipment, and determining the voltage characteristic value of the electric equipment in each sampling period as the voltage data of the electric equipment.
Further, the voltage characteristic value includes at least: one of a maximum value, a minimum value, and an average value.
Further, judging whether the electric equipment fails according to the voltage data of the power supply bus and the voltage data of the electric equipment includes:
judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus;
if so, judging that the electric equipment does not have a fault;
and if not, judging that the electric equipment has faults.
Further, determining whether the voltage characteristic value of the electrical device is positively correlated with the voltage characteristic value of the power supply bus includes:
calculating the voltage characteristic values of the power supply bus and the voltage characteristic values of the electric equipment in a one-to-one correspondence manner to obtain corresponding deviation values;
and judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus according to the deviation value.
Further, judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus according to the deviation value includes:
judging whether the deviation value is smaller than or equal to a preset threshold value;
if so, determining that the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus;
and if not, determining that the voltage characteristic value of the electric equipment is not positively correlated with the voltage characteristic value of the power supply bus.
Further, the determining the location of the failed electric device according to the voltage data of the electric device includes:
after determining that the electric equipment has a fault, extracting address information in voltage data of the electric equipment;
and determining the position of the electric equipment according to the address information.
The invention also provides a fault monitoring device, which is applied to a power supply and distribution system, and comprises:
the data acquisition module is used for acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of electric equipment and sending the voltage data to the data analysis gateway;
and the data analysis gateway is used for judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
Further, the data acquisition module comprises:
the acquisition unit is used for acquiring voltage data of the power supply bus and voltage data of the electric equipment according to a preset sampling period;
the processing unit is used for processing the voltage value of the power supply bus, and determining the voltage characteristic value of the power supply bus in each sampling period as the voltage data of the power supply bus; processing the voltage value of the electric equipment, and determining a voltage characteristic value of the electric equipment in each sampling period as voltage data of the electric equipment;
and the first communication unit is used for sending the voltage data of the power supply bus and the voltage data of the electric equipment to the data analysis gateway.
Further, the data analysis gateway includes:
the second communication unit is used for receiving the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric equipment, which are sent by the data acquisition module;
and the data analysis unit is used for judging whether the electric equipment fails or not according to the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
The invention also provides a power supply and distribution system which comprises a power supply bus, electric equipment and the fault monitoring device.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described fault monitoring method.
By applying the technical scheme of the invention, whether the electric equipment breaks down or not is judged according to the voltage data of the power supply bus and the voltage data of the electric equipment, the position of the broken-down electric equipment is determined according to the voltage data of the electric equipment, and the fault recognition is carried out according to the voltage data, so that signal disturbance or frequency interference is not easy to occur, the error recognition is avoided, and the fault recognition accuracy is further improved.
Drawings
Fig. 1 is a block diagram of a power supply and distribution system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a fault monitoring method according to an embodiment of the invention;
FIG. 3 is a flow chart of a fault detection method according to another embodiment of the present invention;
FIG. 4 is a block diagram of a fault monitoring device according to an embodiment of the present invention;
FIG. 5 is a block diagram of a data acquisition module according to an embodiment of the present invention;
fig. 6 is a block diagram of a data analysis gateway according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe communication units in embodiments of the present invention, these communication units should not be limited by these terms. These terms are only used to distinguish between communication units that are located at different locations and that have different functions. For example, the first communication unit may also be referred to as the second communication unit, and similarly, the second communication unit may also be referred to as the first communication unit, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The present embodiment provides a fault monitoring method, which is applied to a power supply and distribution system, and fig. 1 is a structural diagram of the power supply and distribution system according to the embodiment of the present invention, as shown in fig. 1, the power supply and distribution system includes: one end of the photovoltaic power generation DC/DC1, one end of the bidirectional AC/DC2 and one end of the energy storage charging and discharging DC/DC3 are connected to the direct current bus, the other end of the photovoltaic power generation DC/DC1 is used for connecting a photovoltaic power generation device, the other end of the bidirectional AC/DC2 is used for connecting an alternating current power grid, and the other end of the energy storage charging and discharging DC/DC3 is used for connecting an energy storage device.
At present, for the direct current arc fault detection of the power supply system, time-frequency domain analysis processing is mainly performed through the collection of current signals, analysis and judgment are performed, but under the direct current ecology of an energy internet, in a source-storage-network-load integrated system formed by an alternating current power grid, a photovoltaic power generation device, an energy storage device and direct current power equipment, chopper modulation, frequency conversion control and the like of a high-speed power electronic switching device are widely applied, and under the influence of complex internal and external environments, signal disturbance or frequency interference easily occurs to the current signals, so that the fault arc is identified by mistake, and the accuracy of the direct current arc fault identification is reduced.
In view of the above problem, this embodiment provides a fault monitoring method, and fig. 2 is a flowchart of the fault monitoring method according to the embodiment of the present invention, as shown in fig. 2, the method includes:
s101, voltage data of a power supply bus of a power supply and distribution system and voltage data of electric equipment are obtained.
In specific implementation, the voltage data of the power supply bus and the voltage data of the electric equipment can be acquired through the data acquisition module, and the data acquisition module can be independently used as a device to be installed on a line and can also be integrally configured in the bidirectional AC/DC, the energy storage charging and discharging bidirectional DC/DC, the bidirectional AC/DC and the direct-current electric equipment. In specific implementation, the data obtaining module for obtaining the voltage data of the power supply bus may be disposed inside the bidirectional AC/DC, the energy storage charging and discharging bidirectional DC/DC, or the bidirectional AC/DC, or on the DC bus, and the data obtaining module for obtaining the voltage data of the electrical equipment may be disposed inside the DC electrical equipment, or on a line of a branch where the DC electrical equipment is located.
And S102, judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
If the electric equipment does not have a fault, the relationship between the voltage data of the electric equipment and the voltage data of the power supply bus changes, so that the judgment can be made according to the voltage data of the power supply bus and the voltage data of the electric equipment, namely whether the electric equipment has the fault or not can be judged.
According to the fault monitoring method, whether the electric equipment breaks down or not is judged according to the voltage data of the power supply bus and the voltage data of the electric equipment, the position of the electric equipment which breaks down is determined according to the voltage data of the electric equipment, fault recognition is carried out according to the voltage data, signal disturbance or frequency interference is not prone to occurring, false recognition is avoided, and therefore the accuracy of fault recognition is improved.
Example 2
In order to improve the accuracy of data, facilitate subsequent data comparison and analysis, and improve the identification efficiency, the present embodiment provides another fault monitoring method, which may take several representative voltage data for comparison and analysis within a period of time, so as to obtain voltage data of a power supply bus of a power supply and distribution system and voltage data of a power consumption device, including: acquiring a voltage value of a power supply bus and a voltage value of electric equipment according to a preset sampling period; processing the voltage value of the power supply bus, and determining the voltage characteristic value of the power supply bus in each sampling period as the voltage data of the power supply bus; and processing the voltage value of the electric equipment, and determining the voltage characteristic value of the electric equipment in each sampling period as voltage data of the electric equipment. Wherein the voltage characteristic value at least comprises: one of a maximum value, a minimum value, and an average value.
Under normal conditions of the electric equipment, the voltage data of the electric equipment and the voltage data of the power supply bus should be positively correlated, if the electric equipment does not have a fault, the relationship between the voltage data of the electric equipment and the voltage data of the power supply bus changes, so whether the electric equipment has the fault or not is judged according to the voltage data of the power supply bus and the voltage data of the electric equipment, and the method comprises the following steps: judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus; if so, judging that the electric equipment does not have a fault; if not, the electric equipment is judged to be in fault.
Specifically, the determining whether the voltage characteristic value of the power consumption device is positively correlated with the voltage characteristic value of the power supply bus includes: the voltage characteristic values of the power supply bus and the voltage characteristic values of the electric equipment are calculated in a one-to-one correspondence mode, and corresponding deviation values are obtained; the one-to-one operation means that the maximum voltage value of the power supply bus and the maximum voltage value of the electric equipment are operated, the average voltage value of the power supply bus and the average voltage value of the electric equipment are operated, the minimum voltage value of the power supply bus and the minimum voltage value of the electric equipment are operated, and whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus is judged according to the deviation value. Specifically, the determining whether the voltage characteristic value of the electric device is positively correlated with the voltage characteristic value of the power supply bus according to the deviation value between the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric device includes: judging whether the deviation value is less than or equal to a preset threshold value; if so, determining that the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus; if not, the voltage characteristic value of the electric equipment and the voltage characteristic value of the power supply bus are not positively correlated.
Since the deviation value is an absolute value of a difference between the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric device, and is always equal to or greater than 0, it is determined that the voltage characteristic value of the electric device and the voltage characteristic value of the power supply bus are not positively correlated, that is, the electric device fails, regardless of whether the voltage characteristic value of the electric device is excessively lower than the voltage characteristic value of the power supply bus or the voltage characteristic value of the electric terminal is excessively higher than the voltage characteristic value of the power supply bus.
In a specific implementation, in order to determine a specific location where a fault occurs, the voltage data of the electric device includes not only the voltage value but also address information of the electric device, and determining the location of the electric device where the fault occurs according to the voltage data of the electric device includes: after determining that the electric equipment has a fault, extracting address information in voltage data of the electric equipment; and determining the position of the electric equipment according to the address information.
In the following, taking an example that the power distribution system includes five dc power devices, the data acquisition module includes an acquisition unit, a processing unit, and a first communication unit. The acquisition unit is responsible for acquiring a voltage value of the installation position of the data acquisition module; the processing unit processes the voltage values to obtain an average value, a maximum value and a minimum value in the voltage values; and the information is sent to the data analysis gateway in real time through the first communication unit.
The data analysis gateway comprises a second communication unit and a data analysis unit. The second communication unit receives the voltage data of the power supply bus and the voltage data of the electric equipment sent by the data acquisition module, determines whether the electric equipment fails through a comparison analysis algorithm and a correlation analysis algorithm method, and further judges whether the electric equipment fails and the position of the failed direct-current electric equipment. And the data analysis gateway respectively performs correlation analysis on the average value Um, the maximum value Umax and the minimum value Umin which are sent by the acquired data acquisition modules.
Fig. 3 is a flowchart of a fault detection method according to another embodiment of the present invention, as shown in fig. 3, the method includes:
and S1, acquiring voltage data of the power supply bus and voltage data of the direct current electric equipment.
In specific implementation, a data acquisition module is arranged on a direct current bus, voltage values of an effective power supply bus for n times are acquired in a period T, an average value Um1, a maximum value Umax1 and a minimum value uman 1 of the n voltage values are extracted and analyzed to serve as voltage data of the power supply bus, the data acquisition module is arranged in each direct current electric device to respectively acquire the average value Um 2-Um 6, the maximum value Umax 2-Umax 6 and the minimum value uman 2-uman 6 of the voltage values of each direct current electric device to serve as the voltage data of the direct current electric devices, and correlation analysis is carried out in one-to-one correspondence with the average value Um, the maximum value Umax and the minimum value uman of the voltage values of the bus.
S2, a deviation value between the voltage data of the power supply bus and the voltage data of the dc consumer is calculated.
S3, judging whether the deviation value is larger than the preset threshold value, if not, executing the step S4, and if so, executing the step S5.
And S4, judging that the direct current electric equipment has no fault.
And S5, judging that the direct current electric equipment has a fault.
The data analysis gateway analyzes the average voltage value Um 1-Um 6, the maximum voltage value Umax1-Umax6 and the minimum voltage value uman 1-uman 6 within 2 seconds, and data acquired by the data acquisition modules arranged on the direct current bus and data acquired by the data acquisition modules in the five direct current electric equipment are subjected to deviation value operation to obtain the correlation among the data. Normally, the deviation value is less than or equal to a preset threshold (e.g., 0 or a constant close to 0), indicating that the correlation is strong; the deviation values increased, indicating a diminished correlation. Under the condition that the system is normal, the voltage data of the direct current bus equipment and the voltage data of the power supply bus show positive correlation with strong correlation. When the correlation is monitored to be weakened or not correlated, the abnormal change of the system state is indicated.
And S6, judging the position of the electric equipment with the fault according to the address information in the voltage data of the electric equipment.
And positioning the position of the abnormal fault according to the data source and the topological structure of the line. If the calculation result of the voltage data of the power supply bus and the voltage data acquired by the data acquisition module arranged in the fifth dc electric device is: and the Um 1-Um 5, or Umax1-Umax5, or Umin1-Umin5 are larger than a preset threshold value, which indicates that the position of the branch where the fourth direct current electric equipment is located is abnormal. If the calculation result of the voltage data acquired by the data acquisition module in the fifth dc powered device and the voltage data of the power supply bus is: um 1-Um 6, or Umax1-Umax6, or uman 1-uman 6 are greater than a preset threshold, the fifth dc electric device also has a fault, and if the fifth device and the fourth device have a common line, it indicates that a fault point is present in a portion of the common line of the fourth dc electric device and the fifth dc electric device.
The data analysis gateway can also send the monitored result information to the energy management platform for early warning of energy control or mobile phone APP of maintenance personnel. The energy management platform can update and upgrade the comparative analysis algorithm and the correlation analysis algorithm in time, and the analysis accuracy is improved.
Example 3
The present embodiment provides a fault monitoring device, which is applied to a power supply and distribution system, and fig. 4 is a structural diagram of the fault monitoring device according to the embodiment of the present invention, as shown in fig. 4, the fault monitoring device includes:
and the data acquisition module 10 is configured to acquire voltage data of a power supply bus of the power supply and distribution system and voltage data of the electric device, and send the voltage data to the data analysis gateway.
In specific implementation, the data acquisition module can be independently used as a device to be installed on a line, and can also be integrally configured in bidirectional AC/DC, energy storage charging and discharging bidirectional DC/DC, bidirectional AC/DC and direct current electric equipment. In specific implementation, the data obtaining module for obtaining the voltage data of the power supply bus may be disposed inside the bidirectional AC/DC, the energy storage charging and discharging bidirectional DC/DC, or the bidirectional AC/DC, or on the DC bus, and the data obtaining module for obtaining the voltage data of the electrical equipment may be disposed inside the DC electrical equipment, or on a line of a branch where the DC electrical equipment is located. The number of the data acquisition modules is at least one, and may also be multiple, and in this embodiment, the number of the data acquisition modules is multiple.
And the data analysis gateway 20 is configured to determine whether the electrical device fails according to the voltage data of the power supply bus and the voltage data of the electrical device, and determine the location of the failed electrical device according to the voltage data of the electrical device.
If the electric equipment does not have a fault, the relationship between the voltage data of the electric equipment and the voltage data of the power supply bus changes, so that the judgment can be made according to the voltage data of the power supply bus and the voltage data of the electric equipment, namely whether the electric equipment has the fault or not can be judged.
The fault monitoring device of this embodiment judges whether the consumer breaks down according to the voltage data of power supply bus and the voltage data of consumer to confirm the position of the consumer that breaks down according to the voltage data of consumer, carry out fault identification according to voltage data, be difficult for taking place signal disturbance or frequency interference, avoid taking place the misidentification, and then improve fault identification's precision.
Example 4
In this embodiment, another fault monitoring apparatus is provided, and fig. 5 is a structural diagram of a data acquisition module according to an embodiment of the present invention, in order to improve accuracy of data, facilitate subsequent data comparison and analysis, and improve recognition efficiency, several representative voltage data may be taken for comparison and analysis within a period of time, so that the data acquisition module includes: the acquisition unit 101 is configured to acquire voltage data of a power supply bus and voltage data of an electrical device according to a preset sampling period; the processing unit 102 is configured to process a voltage value of the power supply bus, and determine a voltage characteristic value of the power supply bus in each sampling period as voltage data of the power supply bus; and processing the voltage value of the electric equipment, and determining the voltage characteristic value of the electric equipment in each sampling period as voltage data of the electric equipment. Wherein the characteristic values include at least: one of a maximum value, a minimum value, and an average value.
In order to realize data transmission, the data acquisition module further includes a first communication unit 103, configured to send the voltage data of the power supply bus and the voltage data of the electric device to the data analysis gateway.
Fig. 6 is a structural diagram of a data analysis gateway according to an embodiment of the present invention, and in order to implement receiving data, as shown in fig. 6, the data analysis gateway includes: the second communication unit 201 is used for receiving the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric equipment sent by the data acquisition module; in order to accurately judge whether the dc power consumption device has a fault, the data analysis gateway further includes: and the data analysis unit 202 is configured to determine whether the electrical device fails according to the voltage characteristic value of the power supply bus and the voltage characteristic value of the electrical device, and determine the location of the failed electrical device according to the voltage data of the electrical device.
Under normal conditions of the electric equipment, the voltage data of the electric equipment and the voltage data of the power supply bus should be positively correlated, if the electric equipment does not have a fault, the relationship between the voltage data of the electric equipment and the voltage data of the power supply bus changes, so whether the electric equipment has the fault or not is judged according to the voltage data of the power supply bus and the voltage data of the electric equipment, and the method comprises the following steps: judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus; if so, judging that the electric equipment does not have a fault; if not, the electric equipment is judged to be in fault.
Specifically, the determining whether the voltage characteristic value of the power consumption device is positively correlated with the voltage characteristic value of the power supply bus includes: the voltage characteristic values of the power supply bus and the voltage characteristic values of the electric equipment are calculated in a one-to-one correspondence mode, and corresponding deviation values are obtained; the one-to-one operation means that the maximum voltage value of the power supply bus and the maximum voltage value of the electric equipment are operated, the average voltage value of the power supply bus and the average voltage value of the electric equipment are operated, the minimum voltage value of the power supply bus and the minimum voltage value of the electric equipment are operated, and whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus is judged according to the deviation value. Specifically, the determining whether the voltage characteristic value of the electric device is positively correlated with the voltage characteristic value of the power supply bus according to the deviation value between the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric device includes: judging whether the deviation value is less than or equal to a preset threshold value; if so, determining that the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus; if not, the voltage characteristic value of the electric equipment and the voltage characteristic value of the power supply bus are not positively correlated.
Since the deviation value is an absolute value of a difference between the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric device, and is always equal to or greater than 0, it is determined that the voltage characteristic value of the electric device and the voltage characteristic value of the power supply bus are not positively correlated, that is, the electric device fails, regardless of whether the voltage characteristic value of the electric device is excessively lower than the voltage characteristic value of the power supply bus or the voltage characteristic value of the electric terminal is excessively higher than the voltage characteristic value of the power supply bus.
In a specific implementation, in order to determine a specific location where a fault occurs, the voltage data of the electric device includes not only the voltage value but also address information of the electric device, and the data analysis unit 202 is further configured to: determining the position of a failed electric device according to the voltage data of the electric device, specifically, extracting address information in the voltage data of the electric device after determining that the electric device fails; and determining the position of the electric equipment according to the address information.
Example 5
The embodiment provides a power supply and distribution system, which comprises a power supply bus and electric equipment, and further comprises the fault monitoring device, and the fault monitoring device is used for accurately and timely finding faults of the electric equipment.
Example 6
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the fault monitoring method in the above-described embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A fault monitoring method is applied to a power supply and distribution system, and is characterized by comprising the following steps:
acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of electric equipment;
and judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
2. The method of claim 1, wherein obtaining voltage data of a power supply bus of the power supply and distribution system and voltage data of a powered device comprises:
acquiring a voltage value of the power supply bus and a voltage value of the electric equipment according to a preset sampling period;
processing the voltage value of the power supply bus, and determining the voltage characteristic value of the power supply bus in each sampling period as the voltage data of the power supply bus; and processing the voltage value of the electric equipment, and determining the voltage characteristic value of the electric equipment in each sampling period as the voltage data of the electric equipment.
3. The method according to claim 2, characterized in that the voltage characteristic values comprise at least: one of a maximum value, a minimum value, and an average value.
4. The method of claim 2, wherein determining whether the electrical device is faulty according to the voltage data of the power supply bus and the voltage data of the electrical device comprises:
judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus;
if so, judging that the electric equipment does not have a fault;
and if not, judging that the electric equipment has faults.
5. The method of claim 4, wherein determining whether the voltage characteristic value of the powered device is positively correlated with the voltage characteristic value of the power supply bus comprises:
calculating the voltage characteristic values of the power supply bus and the voltage characteristic values of the electric equipment in a one-to-one correspondence manner to obtain corresponding deviation values;
and judging whether the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus according to the deviation value.
6. The method of claim 5, wherein determining whether the voltage characteristic of the powered device is positively correlated with the voltage characteristic of the power supply bus according to the deviation value comprises:
judging whether the deviation value is smaller than or equal to a preset threshold value;
if so, determining that the voltage characteristic value of the electric equipment is positively correlated with the voltage characteristic value of the power supply bus;
and if not, determining that the voltage characteristic value of the electric equipment is not positively correlated with the voltage characteristic value of the power supply bus.
7. The method of claim 1, wherein the voltage data of the electric device includes address information of the electric device, and determining the location of the failed electric device according to the voltage data of the electric device comprises:
after determining that the electric equipment has a fault, extracting address information in voltage data of the electric equipment;
and determining the position of the electric equipment according to the address information.
8. A fault monitoring device for use in a power supply and distribution system, the device comprising:
the data acquisition module is used for acquiring voltage data of a power supply bus of the power supply and distribution system and voltage data of electric equipment and sending the voltage data to the data analysis gateway;
and the data analysis gateway is used for judging whether the electric equipment fails or not according to the voltage data of the power supply bus and the voltage data of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
9. The apparatus of claim 8, wherein the data acquisition module comprises:
the acquisition unit is used for acquiring voltage data of the power supply bus and voltage data of the electric equipment according to a preset sampling period;
the processing unit is used for processing the voltage value of the power supply bus, and determining the voltage characteristic value of the power supply bus in each sampling period as the voltage data of the power supply bus; processing the voltage value of the electric equipment, and determining a voltage characteristic value of the electric equipment in each sampling period as voltage data of the electric equipment;
and the first communication unit is used for sending the voltage data of the power supply bus and the voltage data of the electric equipment to the data analysis gateway.
10. The apparatus of claim 9, wherein the data analysis gateway comprises:
the second communication unit is used for receiving the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric equipment, which are sent by the data acquisition module;
and the data analysis unit is used for judging whether the electric equipment fails or not according to the voltage characteristic value of the power supply bus and the voltage characteristic value of the electric equipment, and determining the position of the failed electric equipment according to the voltage data of the electric equipment.
11. A power supply and distribution system comprising a power supply bus and a consumer, further comprising a fault monitoring device according to any one of claims 8 to 10.
12. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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