CN114865790A - Low-voltage distribution network monitoring method, device and system based on fusion terminal - Google Patents
Low-voltage distribution network monitoring method, device and system based on fusion terminal Download PDFInfo
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- CN114865790A CN114865790A CN202210496394.9A CN202210496394A CN114865790A CN 114865790 A CN114865790 A CN 114865790A CN 202210496394 A CN202210496394 A CN 202210496394A CN 114865790 A CN114865790 A CN 114865790A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a low-voltage distribution network monitoring method, a low-voltage distribution network monitoring device and a low-voltage distribution network monitoring system based on a fusion terminal, and belongs to the technical field of low-voltage distribution network monitoring, wherein the low-voltage distribution network monitoring method based on the fusion terminal comprises the following steps: acquiring low-voltage transformer area basic data acquired based on a fusion terminal; and performing low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault study and judgment analysis based on the low-voltage transformer area basic data, accurately positioning a fault area, and sending warning information. The invention monitors and acquires comprehensive information of the intelligent equipment such as running states, running environment weather, temperature and humidity, equipment production running retirement states and the like at different time scales based on basic data provided by the fusion terminal, simultaneously looks up information of a line hanging area, comprehensively analyzes and studies fault information, rapidly positions a fault area and sends out alarm information, and provides accurate and efficient information technology support for emergency maintenance scheduling.
Description
Technical Field
The invention relates to a low-voltage distribution network monitoring method, device and system based on a fusion terminal, and belongs to the technical field of low-voltage distribution network monitoring.
Background
With the rapid development of the power grid scale, the power distribution network scale is continuously enlarged, the power grid structure is increasingly complicated, and the regulation and control service is increased day by day. The problems of weak power distribution network, low equipment reliability, low automation degree, weak management level and the like of historical legacy are increasingly prominent. Meanwhile, more and more metering, protecting, converting, controlling, monitoring, electricity utilization and other devices are connected to the power system.
The existing power distribution monitoring field only relates to monitoring of medium voltage, the running state of equipment in a low-voltage transformer area is difficult to effectively monitor, the fault is not repaired timely, potential safety hazards exist, and the reliability of power supply is influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a low-voltage power distribution network monitoring method, a device and a system based on a fusion terminal, and solves the technical problems.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a low voltage distribution network monitoring method based on a convergence terminal, including:
acquiring low-voltage transformer area basic data acquired based on a fusion terminal;
and performing low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault study and judgment analysis based on the low-voltage transformer area basic data.
Optionally, the power supply reliability analysis specifically includes:
calculating the low-voltage power supply reliability by the following calculation formula:
calculating the average power failure time of the user, wherein the calculation formula is as follows:
calculating the average power failure times of the user, wherein the calculation formula is as follows:
optionally, the monitoring of the platform area lean line loss comprises:
according to the line power supply and power output provided by the fusion terminal, the line loss rate is calculated by the following calculation formula:
optionally, the low voltage distribution network monitoring method further includes:
and calculating the average value of the line loss rate, comparing the current load data and the historical load data of the station area associated with the line if the line loss rate at a certain moment is abnormal, and determining that the line has the possible risk of electricity stealing if the load difference is greater than a set threshold value.
Optionally, the fault analysis comprises: collecting power failure time, separating brake signal judgment, single distribution transformer power failure signal judgment, fault area analysis and maintenance judgment.
Optionally, the aggregating the outage time includes: calculating and analyzing a distribution transformer power failure event in a preset time window;
the brake separating signal discrimination comprises the following steps: based on the collected opening signals, marking distribution transformer power failure events occurring on corresponding lines as actual opening events, and marking the actual opening events as failure analysis and judgment;
the single distribution point signal judgment comprises the following steps: judging whether only one distribution transformer sends a power failure event signal or not in a research and judgment range aiming at the basic data of the low-voltage transformer area after the data related to the actual brake opening event is removed, if so, researching and judging that the distribution transformer has power failure, carrying out data inquiry on the distribution transformer for one time, if the data cannot be inquired, explaining that the distribution transformer has power failure, and if the data can be inquired, explaining that the distribution transformer has not power failure, finishing the research and judgment process; if one distribution transformer power failure occurs in the research and judgment range, the power failure research and judgment of the multiple distribution transformers are carried out, and the data are not recalled;
the fault area analysis comprises the steps of judging a fault area based on all distribution and transformation power failure signals and pushing down a fault tripping switch or a device with a broken line;
and the maintenance judgment comprises the step of obtaining the maintenance range, and if the condition of power grid maintenance exists in the area where the distribution transformer power failure event occurs is judged, adding a maintenance mark to the fault in the comprehensive alarm and record of fault research and judgment.
Optionally, the low-pressure station area condition monitoring comprises: and according to the monitored equipment electrical quantity and environment state data, centrally analyzing and reflecting whether the running state of the equipment is stable or not by a period of time.
In a second aspect, the present invention provides a low voltage distribution network monitoring apparatus based on a converged terminal, the apparatus including:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
In a third aspect, the invention provides a low-voltage distribution network monitoring system based on a fusion terminal, which comprises the fusion terminal, an internet of things management platform and a low-voltage distribution network monitoring device based on the fusion terminal;
the fusion terminal transmits the acquired data to the Internet of things management platform, and the two are communicated by adopting an MQTT communication protocol;
the low-voltage distribution network monitoring device includes:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal from the Internet of things management platform;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
In a fourth aspect, the present invention provides a low voltage distribution network monitoring system based on a converged terminal, including a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the method according to any one of the convergence terminal based low voltage distribution network monitoring methods of the first aspect.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a low-voltage distribution network monitoring method, a device and a system based on a fusion terminal, which solve the problems that the prior art only monitors basic electric quantity data and the like of a transformer area and does not have corresponding analysis results.
Drawings
Fig. 1 is a flow chart of a low-voltage distribution network monitoring method based on a convergence terminal according to an embodiment of the present invention;
fig. 2 is a flowchart of data collection and analysis by the convergence terminal according to the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to the drawings and specific examples, and it should be understood that the specific embodiments in the examples and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and technical features of the examples and embodiments of the present application may be combined with each other without conflict.
The term "and/or" herein is merely an associative relationship describing 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.
Example one
Fig. 1 is a flowchart of a low-voltage distribution network monitoring method based on a converged terminal according to an embodiment of the present invention, where the low-voltage distribution network monitoring method based on a converged terminal provided in this embodiment is applicable to a terminal, and may be executed by a low-voltage distribution network monitoring apparatus based on a converged terminal, where the apparatus may be implemented by software and/or hardware, and the apparatus may be integrated in a terminal, for example: any smart phone, tablet computer or computer device with communication function.
Referring to fig. 1, the method for monitoring a low-voltage distribution network based on a convergence terminal of the present embodiment includes the following steps:
acquiring low-voltage transformer area basic data acquired based on a fusion terminal;
and performing low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault study and judgment analysis based on the low-voltage transformer area basic data.
In a specific implementation manner of the embodiment of the present invention, the power supply reliability analysis specifically includes:
calculating the reliability of low-voltage power supply, wherein the calculation formula is as follows:
calculating the average power failure time of the user, wherein the calculation formula is as follows:
calculating the average power failure times of the user, wherein the calculation formula is as follows:
in a specific implementation manner of the embodiment of the present invention, the monitoring of the lean line loss in the distribution room includes:
according to the line power supply and power output provided by the fusion terminal, the line loss rate is calculated by the following calculation formula:
in a specific implementation manner of the embodiment of the present invention, the method for monitoring the low-voltage distribution network further includes:
and calculating the average value of the line loss rate, comparing the current load data and the historical load data of the station area associated with the line if the line loss rate at a certain moment is abnormal, and determining that the line has the possible risk of electricity stealing if the load difference is greater than a set threshold value.
In a specific implementation manner of the embodiment of the present invention, the fault analysis includes: collecting power failure time, separating brake signal judgment, single distribution transformer power failure signal judgment, fault area analysis and maintenance judgment; in particular, in the implementation:
the collection power failure time comprises the following steps: calculating and analyzing a distribution transformer power failure event in a preset time window;
the brake separating signal discrimination comprises the following steps: based on the collected opening signals, marking distribution transformer power failure events occurring on corresponding lines as actual opening events, and marking the actual opening events as failure analysis and judgment;
the single distribution point signal judgment comprises the following steps: judging whether only one distribution transformer sends a power failure event signal or not in a research and judgment range aiming at the basic data of the low-voltage transformer area after the data related to the actual brake opening event is removed, if so, researching and judging that the distribution transformer has power failure, carrying out data inquiry on the distribution transformer for one time, if the data cannot be inquired, explaining that the distribution transformer has power failure, and if the data can be inquired, explaining that the distribution transformer has not power failure, finishing the research and judgment process; if one distribution transformer power failure occurs in the research and judgment range, the power failure research and judgment of the multiple distribution transformers are carried out, and the data are not recalled;
the fault area analysis comprises the steps of judging a fault area based on all distribution and transformation power failure signals and pushing down a fault tripping switch or a device with a broken line;
and the maintenance judgment comprises the step of obtaining the maintenance range, and if the condition of power grid maintenance exists in the area where the distribution transformer power failure event occurs is judged, adding a maintenance mark to the fault in the comprehensive alarm and record of fault research and judgment.
In a specific implementation manner of the embodiment of the present invention, the monitoring of the low-voltage transformer area status includes: and according to the monitored equipment electrical quantity and environmental state data, centrally analyzing and reflecting whether the running state of the equipment is stable or not by a period of time.
The embodiment of the invention discloses a low-voltage distribution network monitoring method based on a fusion terminal, which solves the problems that the prior art only monitors basic electric quantity data and the like of a transformer area and does not have corresponding analysis results.
In the following, a detailed description is given to the low-voltage distribution network monitoring method based on the convergence terminal in the foregoing embodiment of the invention, where an implementation subject of the low-voltage distribution network monitoring method based on the convergence terminal in this embodiment is a convergence terminal, and in other embodiments of this embodiment, the implementation subject of the low-voltage distribution network monitoring method based on the convergence terminal may also be another management platform/device/equipment/system.
More specifically, referring to fig. 1-2, a specific implementation method of the above embodiment includes the following steps:
s100, collecting low-voltage basic data based on a fusion terminal;
s110, electrical quantity basic data acquisition
Based on the fusion terminal, relevant basic data of electrical quantities are collected, wherein the relevant basic data comprise the electrical quantities of equipment such as a distribution transformer low-voltage outlet switch and a branch box switch, and the electrical quantities comprise three-phase voltage, three-phase current, power, load factor and the like.
S120. state quantity basic data acquisition
Based on the fusion terminal, the opening and closing signals of the switch can be collected.
S130, user ammeter data acquisition
Based on the fusion terminal, the associated user information under the platform area can be collected, wherein the user information comprises the number of users, power failure signals, power restoration signals, power supply quantity and the like.
The fusion terminal gathers the acquired basic data such as the electric quantity, the equipment environment quantity and the like to a data center, and the data center manages the acquired data, such as storage and reading of the acquired data, data authority management, message routing and the like. The basic data are transmitted to the internet of things management platform, the internet of things management platform is deployed at the cloud end, online management and remote operation and maintenance of various types of edge internet of things agents and intelligent terminals are achieved, and various types of acquisition terminals are managed in a unified mode. An MQTT communication protocol is adopted between the fusion terminal and the Internet of things management platform, the MQTT protocol adopts a publish/subscribe mechanism to complete message interaction, and the mechanism can provide one-to-many message distribution.
The IOT management platform is responsible for integrated management of the convergence terminal, including equipment management, container management, application management and the like. Device management includes device upgrade, device control, and the like. Container management includes container installation, upgrade, start, stop, delete, configuration, status query, etc. The application management comprises application issuing, application control, application configuration, application upgrading and the like.
S200, monitoring the running state of the transformer area based on the low-voltage basic data acquired by the fusion terminal;
and monitoring the running state of the transformer area according to the electrical quantity basic data and the state quantity basic data based on the low-voltage basic data, namely the electrical quantity basic data and the state quantity basic data, collected by the fusion terminal.
Specifically, the monitoring of the operating state of the platform area includes:
s210, collecting basic data of electrical quantity
The electric quantities of equipment such as a distribution transformer low-voltage outlet switch, a branch box switch and the like comprise three-phase voltage, three-phase current, power, load factor and the like.
S220, acquiring state quantity basic data
And collecting switching-on and switching-off signals of the switch based on the fusion terminal.
S230. data acquisition of user electric meter
S230, monitoring the distribution transformation running state according to the collected data
Based on the integrated terminal, the associated user information under the platform area can be collected, wherein the user information comprises the number of users, power failure signals, power restoration signals and power supply amount.
S240, monitoring the distribution transformation running state according to the collected data
According to the data, whether the running state of the equipment is stable or not can be reflected through a period of centralized analysis, if the load rate of the distribution transformer is greater than 80% and is heavy load for 2 hours, and if the load rate is greater than 100% and is overload for two hours, corresponding alarm information is sent out according to the heavy overload condition.
S300, comprehensively analyzing the low-voltage data of the transformer area based on the fusion terminal;
s310, power supply reliability analysis
The analysis of power supply reliability, including power supply reliability, the number of the users that have a power failure, the length of power failure, etc. according to the data that the integration terminal provided, carry out following analysis to it:
s311, calculating the reliability index of the low-voltage power supply
According to the power failure signal provided by the fusion terminal and the next power restoration signal, the power failure duration of the power failure of the user is calculated and recorded as basic data for calculating the reliability of the low-voltage power supply, in the statistical period, the ratio of the sum of the power failure durations of the user to the total hours of the power supply is used as a power supply reliability index, and the power supply reliability index is calculated once per month.
S312, calculating the average power failure time index of the user
And calculating and recording the power failure time of the power failure of the user at the time according to the power failure signal provided by the fusion terminal and the next power restoration signal, wherein the power failure time is used as basic data for calculating the reliability of the low-voltage power supply, and the ratio of the sum of the power failure time of the user to the total number of users is used as the average power failure time index of the user in the statistical period. The average power off time index of the user is calculated once per month.
S313, calculating the average power failure frequency index of the user
And calculating and recording the power failure duration of the power failure of the user at the time according to the power failure signal provided by the fusion terminal and the next power restoration signal, wherein one record is used as one power failure, and the ratio of the sum of the power failure times of the user to the total number of users is used as the average power failure time index of the user in the counting period. The user average outage indicator is calculated once per month.
S320, monitoring the lean line loss of the transformer area, providing electric quantity information analysis of each node through a fusion terminal, and comprising the following steps: the line loss rate is calculated according to the line electricity supply quantity and the line electricity supply quantity provided by the fusion terminal, the line loss rate can reflect the electricity consumption loss of a power supply line, the accuracy of the line loss rate is ensured through the calculation of the daily line loss and the monthly line loss of a plurality of lines based on the comprehensive analysis of the distribution room low-voltage data of the fusion terminal, and the larger the line loss rate is, the larger the loss is.
Calculating the line loss rate, wherein the specific formula is as follows:
and S330, combining the historical load data and the line loss abnormal data of the transformer area to assist in judging the electricity stealing behavior. Specifically, we can obtain an average value by continuously monitoring the line loss rate of the line, and if the line loss rate at a certain time is suddenly abnormal, we can analyze the line loss rate by combining the station area associated with the line. Load data of a transformer area can be provided by a fusion terminal, the load data of the transformer area at the current moment is compared with historical data, and if the load difference is large, electricity stealing risks may exist on a line.
S400, comprehensive fault study and judgment are carried out based on the fusion terminal, and fault areas are accurately positioned
Through data such as fault alarm provided by the fusion terminal, the fault area is accurately positioned, and a solution is proposed in time, specifically the following procedures are adopted:
the method comprises the steps of collecting power distribution and power failure events according to lines, analyzing fault areas, analyzing a distribution and transformation public range for sending the power failure events, obtaining public upstream switches on the distribution and transformation power supply paths, and obtaining possible fault areas as power supply path downstream areas of the public upstream switches. And the user is informed of which switches are likely to have power failure through a comprehensive alarm form, and after fault analysis is completed, the number of users can be calculated when the fault has power failure through a distribution transformer power restoration event. Meanwhile, the actual brake opening and the processing of the maintenance power failure event are considered.
The comprehensive fault research and judgment mainly comprises the following steps:
s410, collecting power failure events
A time window of distribution substation blackout events is collected. After a certain area of the distribution network is powered off, the time for sending the power failure event by the distribution transformer may be inconsistent, so that the time window is manually set, and only the power failure event in the time period is calculated and analyzed.
S420, brake separating signal discrimination
The method is characterized in that a distribution transformer power failure event occurring on a line is marked as an actual brake opening event through collected power failure data, namely a brake opening signal, and the actual brake opening condition is not judged, so that the purpose of judging whether actual brake opening occurs to a switch in a distribution network station and a switch with a terminal on the line is mainly achieved.
S430. judging power failure signal of single distribution transformer
After actual brake separating data are removed, whether only one distribution transformer sends a power failure event signal is judged, if yes, the distribution transformer is judged to be single distribution transformer power failure, the situation that the power failure signal sent by the single distribution transformer is unreliable is possible, data is called for once for the distribution transformer, if the data cannot be called, the distribution transformer is determined to have power failure, and if the data can be called, the power failure does not exist, the judging process is ended. If one distribution transformer power failure does not occur within the research and judgment range, the power failure research and judgment of the multiple distribution transformers are carried out without calling and testing data.
S440, maintenance judgment
After the single distribution transformer power failure signal is judged, after the distribution transformer is confirmed to be really powered off, whether power grid maintenance exists in a time period and an area where a distribution transformer power failure event occurs needs to be judged, and the maintenance range can be obtained through a scheduling operator listing range, and if the condition of accessing structured power failure information is met, the maintenance range can also be obtained through the structured power failure information. And if the condition of power grid maintenance exists in the area with the distribution and transformation power failure event is judged, adding a maintenance mark to the fault in the fault research and judgment comprehensive alarm and record.
S450. failure zone analysis
And judging a fault area according to all received distribution and transformation power failure signals and pushing down a fault tripping switch or a broken line device. The upstream switch of the line where the power failure distribution transformer is located can be found, if the upstream switch is still in an opening state, the upstream switch continues to trace upwards, when the switch is found to be a closing signal, the power failure area can be judged to be in the section of power supply path, and the tripping switch is the first opening switch on the power supply path.
Example two
The embodiment of the invention provides a low-voltage distribution network monitoring device based on a fusion terminal, which comprises:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
In a specific implementation manner of the embodiment of the present invention, an execution method of the low-voltage distribution network monitoring apparatus based on the convergence terminal of the embodiment specifically includes the following steps:
acquiring low-voltage transformer area basic data acquired based on a fusion terminal;
and performing low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault study and judgment analysis based on the low-voltage transformer area basic data.
Optionally, the power supply reliability analysis specifically includes:
calculating the low-voltage power supply reliability by the following calculation formula:
calculating the average power failure time of the user, wherein the calculation formula is as follows:
calculating the average power failure times of the user, wherein the calculation formula is as follows:
optionally, the monitoring of the platform area lean line loss includes:
according to the line power supply and power output provided by the fusion terminal, the line loss rate is calculated by the following calculation formula:
optionally, the low voltage distribution network monitoring method further includes:
and calculating the average value of the line loss rate, comparing the current load data and the historical load data of the station area associated with the line if the line loss rate at a certain moment is abnormal, and determining that the line has the possible risk of electricity stealing if the load difference is greater than a set threshold value.
Optionally, the fault analysis comprises: collecting power failure time, separating brake signal judgment, single distribution transformer power failure signal judgment, fault area analysis and maintenance judgment.
Optionally, the blackout collection blackout time includes: calculating and analyzing a distribution transformer power failure event in a preset time window;
the brake separating signal discrimination comprises the following steps: based on the collected opening signals, marking distribution transformer power failure events occurring on corresponding lines as actual opening events, and marking the actual opening events as failure analysis and judgment;
the single distribution point signal judgment comprises the following steps: judging whether only one distribution transformer sends a power failure event signal or not in a research and judgment range aiming at the basic data of the low-voltage transformer area after the data related to the actual brake opening event is removed, if so, researching and judging that the distribution transformer has power failure, carrying out data inquiry on the distribution transformer for one time, if the data cannot be inquired, explaining that the distribution transformer has power failure, and if the data can be inquired, explaining that the distribution transformer has not power failure, finishing the research and judgment process; if one distribution transformer power failure occurs in the research and judgment range, the power failure research and judgment of the multiple distribution transformers are carried out, and the data are not recalled;
the fault area analysis comprises the steps of judging a fault area based on all distribution and transformation power failure signals and pushing down a fault tripping switch or a device with a broken line;
and the maintenance judgment comprises the steps of acquiring the maintenance range, and if the condition of power grid maintenance exists in the area where the distribution transformer power failure event occurs is judged, adding a maintenance mark to the fault in the comprehensive alarm and record of fault research and judgment.
Optionally, the low-pressure station area condition monitoring comprises: and according to the monitored equipment electrical quantity and environment state data, centrally analyzing and reflecting whether the running state of the equipment is stable or not for a period of time.
In another embodiment of this embodiment, the main implementation body of the low-voltage distribution network monitoring method based on the converged terminal may also be another management platform/device/equipment/system.
The low-voltage distribution network monitoring device based on the fusion terminal provided by the embodiment of the invention can execute the low-voltage distribution network monitoring method based on the fusion terminal provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
EXAMPLE III
Fig. 1 is a low-voltage distribution network monitoring system based on a convergence terminal according to an embodiment of the present invention, which provides a low-voltage distribution network monitoring system based on a convergence terminal, and includes a convergence terminal, an internet of things management platform, and a low-voltage distribution network monitoring apparatus based on a convergence terminal;
the fusion terminal transmits the acquired data to the Internet of things management platform, and the two are communicated by adopting an MQTT communication protocol;
the low-voltage distribution network monitoring device includes:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal from the Internet of things management platform;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
The device is used for executing the low-voltage distribution network monitoring method based on the converged terminal provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method.
Example four
The embodiment of the invention provides a low-voltage distribution network monitoring system based on a fusion terminal, which comprises a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is used for operating according to the instruction to execute the low-voltage distribution network monitoring method based on the fusion terminal provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, apparatus, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, devices (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (11)
1. The low-voltage distribution network monitoring method based on the fusion terminal is characterized by comprising the following steps:
acquiring low-voltage transformer area basic data acquired based on a fusion terminal;
and performing low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault study and judgment analysis based on the low-voltage transformer area basic data.
2. The method for monitoring the low-voltage distribution network based on the converged terminal according to claim 1, wherein the power supply reliability analysis specifically comprises:
calculating the low-voltage power supply reliability by the following calculation formula:
calculating the average power failure time of the user, wherein the calculation formula is as follows:
calculating the average power failure times of the user, wherein the calculation formula is as follows:
3. the method for monitoring the low-voltage distribution network based on the converged terminal, according to claim 1, wherein the platform area lean line loss monitoring comprises:
according to the line power supply and power output provided by the fusion terminal, the line loss rate is calculated by the following calculation formula:
4. the converged terminal-based low voltage distribution network monitoring method according to claim 3, wherein the low voltage distribution network monitoring method further comprises:
and calculating the average value of the line loss rate, comparing the current load data and the historical load data of the station area associated with the line if the line loss rate at a certain moment is abnormal, and judging that the line has the possible risk of electricity stealing if the load difference is greater than a set threshold value.
5. The method according to claim 1, wherein the fault analysis comprises: collecting power failure time, separating brake signal judgment, single distribution transformer power failure signal judgment, fault area analysis and maintenance judgment.
6. The method according to claim 5, wherein the collecting of the blackout time comprises: calculating and analyzing a distribution transformer power failure event in a preset time window;
the brake separating signal discrimination comprises the following steps: based on the collected opening signals, marking distribution transformer power failure events occurring on corresponding lines as actual opening events, and marking the actual opening events as failure analysis and judgment;
the single distribution point signal judgment comprises the following steps: judging whether only one distribution transformer sends a power failure event signal or not in a research and judgment range aiming at the basic data of the low-voltage transformer area after the data related to the actual brake-separating event is removed, if so, researching and judging that the single distribution transformer has power failure, carrying out data inquiry on the distribution transformer once, if the data cannot be inquired, indicating that the distribution transformer has power failure, and if the data can be inquired, indicating that the distribution transformer has not power failure, ending the research and judgment process; if one distribution transformer power failure occurs in the research and judgment range, the power failure research and judgment of the multiple distribution transformers are carried out, and the data are not recalled;
the fault area analysis comprises the steps of judging a fault area based on all distribution and transformation power failure signals and pushing down a fault trip switch or equipment with a broken line;
and the maintenance judgment comprises the step of obtaining the maintenance range, and if the condition of power grid maintenance exists in the area where the distribution transformer power failure event occurs is judged, adding a maintenance mark to the fault in the comprehensive alarm and record of fault research and judgment.
7. The method for monitoring the low-voltage distribution network based on the converged terminal, according to claim 1, wherein the low-voltage distribution network state monitoring comprises: and according to the monitored equipment electrical quantity and environmental state data, centrally analyzing and reflecting whether the running state of the equipment is stable or not by a period of time.
8. Low voltage distribution network monitoring arrangement based on fuse terminal, its characterized in that, the device includes:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
9. The low-voltage distribution network monitoring system based on the fusion terminal is characterized by comprising the fusion terminal, an Internet of things management platform and a low-voltage distribution network monitoring device based on the fusion terminal;
the fusion terminal transmits the acquired data to the Internet of things management platform, and the Internet of things management platform and the fusion terminal communicate with each other by adopting an MQTT communication protocol;
the low-voltage distribution network monitoring device includes:
the data acquisition module is used for acquiring low-voltage basic data acquired based on the fusion terminal from the Internet of things management platform;
and the data analysis module is used for carrying out low-voltage transformer area state monitoring, power supply reliability analysis, transformer area lean line loss monitoring and/or fault analysis based on the low-voltage transformer area basic data.
10. The system according to claim 9, wherein the internet of things management platform is used for managing equipment, containers and applications of the converged terminal, wherein the equipment management comprises equipment upgrading and equipment control; the container management comprises container installation, upgrading, starting, stopping, deleting, configuring and state query; the application management comprises application issuing, application control, application configuration and application upgrading.
11. The low-voltage distribution network monitoring system based on the convergence terminal is characterized by comprising a storage medium and a processor;
the storage medium is used for storing instructions;
the processor is to operate in accordance with the instructions to perform the method of any one of claims 1-7.
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