CN112198379A - Low-voltage electric equipment fault positioning system based on electric energy metering technology - Google Patents
Low-voltage electric equipment fault positioning system based on electric energy metering technology Download PDFInfo
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- CN112198379A CN112198379A CN202010959969.7A CN202010959969A CN112198379A CN 112198379 A CN112198379 A CN 112198379A CN 202010959969 A CN202010959969 A CN 202010959969A CN 112198379 A CN112198379 A CN 112198379A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Abstract
The invention discloses a low-voltage electric equipment fault positioning system based on an electric energy metering technology, which comprises a positioning device, wherein the positioning device comprises an MCU (microprogrammed control unit), a characteristic data acquisition module, a characteristic database, a touch display screen, a communication module and a power supply module; the input end of the characteristic data acquisition module is respectively connected with the digital transmitter of each room and the metering module of the electric energy meter, the output end of the characteristic data acquisition module, the characteristic database, the display screen and the communication module are all connected with the MCU, and the communication module is connected with the user software system. According to the invention, by arranging the positioning device, the characteristic database is established, the electricity consumption data is collected in real time, the transient characteristic power and the transient current amplitude are extracted, and through data analysis and comparison, the position of a room with a fault can be identified, the faulty electrical appliance in the room can be identified, the fault positioning can be realized rapidly, and meanwhile, the information is transmitted to a user, so that the fault finding efficiency is improved.
Description
Technical Field
The invention relates to the field of low-voltage user fault information acquisition, in particular to various electrical equipment and electrical appliances for residents, schools and public implementation, aims at various electricity utilization habits and potential electricity utilization hazards of the electrical appliances with different loads and function requirements, quickly positions fault positions and fault equipment, reduces manual troubleshooting difficulty and potential electricity utilization hazards, and is particularly suitable for places with management restrictions on the electrical appliances.
Background
In recent years, the ubiquitous power internet of things construction is comprehensively and rapidly developed under the advocation and the vigorous promotion of national power grid companies. The specific expression form and application of the ubiquitous Internet of things in the power industry aim at connecting power users and equipment thereof, power grid enterprises and equipment thereof, power generation enterprises and equipment thereof, suppliers and equipment thereof, and people and things to generate shared data, provide services for users, power grids, power generation, suppliers and government society, take the power grids as hubs, play a role in platform and sharing, create greater opportunities for the development of all industries and more market subjects, and create value services. The field of intelligent power utilization directly oriented to low-voltage users is always a hotspot and a difficulty in smart power grid construction in recent years, but with the development and the perfection of related technologies and equipment, a home energy information service system capable of realizing comprehensive, efficient and intelligent utilization of power flow and information flow is bound to become a focus and a bright spot of ubiquitous power internet of things construction.
Compared with the traditional power utilization network, the majority of the current household intelligent power utilization system utilizes a narrow-band low-voltage power line carrier (N-PLC) technology, mainly solves the problems of information access and uploading of various terminal power utilization equipment, transmission of remote control signals and the like, and provides broadband access of the terminal power utilization equipment and network equipment on the basis of a broadband low-voltage power line carrier (B-PLC) or low-voltage optical fiber composite cable (OPLC) technology, and develops diversified services such as user bidirectional interaction and the like on the basis to obtain better experience. However, due to the limitations of the concept, technology and standard, some disadvantages still exist, for example, the fault location capability is not available. With the increase of household appliances, the probability of the fault short circuit of the appliances is increased, so that when the fault occurs, the fault position needs to be located in time, and the damage caused by the fault can be reduced by rapidly identifying the fault appliances.
Disclosure of Invention
The applicant has tackled these drawbacks of the prior art described above and has provided a fault location system for low voltage users which is structurally sound.
The technical scheme adopted by the invention is as follows:
a low-voltage electric equipment fault positioning system based on an electric energy metering technology comprises a positioning device, wherein the positioning device comprises an MCU (microprogrammed control unit), a characteristic data acquisition module, a characteristic database, a touch display screen, a communication module and a power supply module; the input end of the characteristic data acquisition module is respectively connected with the digital transmitter of each room and the metering module of the electric energy meter, the output end of the characteristic data acquisition module, the characteristic database, the display screen and the communication module are all connected with the MCU, the communication module is connected with the user software system, wherein,
the metering module of the intelligent electric energy meter samples current and voltage waveform data of the whole house electrical equipment in real time, and the metering module sends the data to the characteristic data acquisition module;
the digital transmitter is used for transmitting the electricity utilization data of the room to the characteristic data acquisition module;
the characteristic data acquisition module is used for preprocessing data sent by the metering module and the digital transmitter, filtering abnormal data and sending all the data to the MCU;
the MCU is used for processing the data acquired by the metering module and extracting fault signal characteristic quantities of the electrical equipment through a wavelet analysis algorithm, wherein the fault signal characteristic quantities comprise load steady-state power parameters, load on-off transient state power parameters, load fault transient state power parameters, room steady-state current amplitude values and short-circuit fault current amplitude values; extracting transient characteristic power parameters and transient current amplitude values from data collected by a digital transmitter; comparing the transient current amplitude with the steady-state current amplitude of the corresponding room in the characteristic database, and judging that no fault exists when the comparison result is basically matched; when the comparison result is not matched, comparing the transient current amplitude with the short-circuit fault current amplitude, and if the comparison result is not matched, comparing the transient characteristic power parameter with the load on-off transient power parameter of the corresponding room in the characteristic database to obtain an electric appliance on-off identification result; when the transient current amplitude is matched with the comparison result of the short-circuit fault current amplitude, judging that the room has a short-circuit fault, and identifying the fault of the electric appliance; the transient characteristic power parameters are compared with load fault transient power parameters of corresponding rooms in a characteristic database, and when the comparison results are basically matched, the fault electric appliance identification is realized;
a characteristic database for storing the characteristic quantity of the fault signal;
the power supply module is used for supplying power to the display screen, the MCU and the communication module;
the communication module is used for sending the corresponding room position information and the corresponding fault electric appliance identification information to the user software system;
and the display screen displays the identification information of the fault electric appliance and the corresponding room position information.
Preferably, a main air switch is arranged on a main circuit of each room, and the main air switch is connected with a load at the tail end of the circuit through a digital transmitter; an end air switch is provided between the load and the digital transmitter.
Preferably, a UPS is further arranged in the positioning device, the power module supplies power to the UPS, and when the power module cannot normally output power, the UPS supplies power to the touch display screen, the MCU and the communication module.
Preferably, the communication module is a GPRS communication module.
Preferably, the display screen is a touch display screen.
The invention has the following beneficial effects:
according to the invention, by arranging the positioning device, a characteristic database is established, electricity data are collected in real time, and transient characteristic power and a transient current amplitude are extracted, so that the position of a room with a fault can be identified, fault electric appliances in the room can be identified, fault positioning can be realized quickly, and information is transmitted to a user; the fault finding efficiency is improved;
according to the invention, by arranging the UPS, when power is off or the power module has no output, the UPS can supply power to the touch display screen, the MCU and the communication module, and fault position information is displayed and sent to a user in time, so that the user and maintenance personnel can remove the fault problem as soon as possible.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, the low-voltage power consumption device fault location system based on the electric energy metering technology includes a location device, where the location device includes an MCU, a feature data acquisition module, a feature database, a touch display screen, a communication module, and a power supply module; a circuit of each room is provided with a main air switch which is connected with a socket or lighting equipment at the tail end of the circuit through a digital transmitter, and the socket is connected with a load; the tail end of the circuit is also provided with a tail end air switch; the digital transmitter of each room and the metering module of the intelligent electric energy meter are connected with the input end of the characteristic data acquisition module, the output end of the characteristic data acquisition module, the characteristic database, the touch display screen and the communication module are connected with the MCU, the communication module is connected with the user software system, and the power supply module supplies power for the touch display screen, the MCU and the communication module. The positioning device is further provided with a UPS power supply, the power supply module supplies power to the UPS power supply, and when the power supply module cannot normally output power, the UPS power supply supplies power to the touch display screen, the MCU and the communication module.
The invention specifically comprises the following steps:
(1) establishing a characteristic database: the method comprises the following steps that a metering module of the intelligent electric energy meter samples current and voltage waveform data of full-house electrical equipment in real time, the metering module sends the data to a characteristic data acquisition module, the characteristic data acquisition module preprocesses the data, abnormal data are filtered out, and the data are sent to an MCU (microprogrammed control Unit); the MCU processes data, and fault signal characteristic quantities of the electrical equipment are extracted through a wavelet analysis algorithm, wherein the fault signal characteristic quantities comprise load steady-state power parameters, load on-off transient-state power parameters, load fault transient-state power parameters, room steady-state current amplitude values and short-circuit fault current amplitude values; the MCU stores the fault signal characteristic quantity into a characteristic database;
(2) collecting power consumption data: numbering the digital transmitters of each room, sending electricity utilization data of the rooms to a characteristic data acquisition module in turn, preprocessing the data by the characteristic data acquisition module, and sending the data to an MCU (micro control unit); the MCU extracts transient characteristic power parameters and transient current amplitudes from the data;
(3) and (3) data comparison: the MCU compares the transient current amplitude with the steady-state current amplitude of the corresponding room in the characteristic database, and when the comparison result is basically matched, the MCU judges that no fault exists and repeats the step 2; when the comparison result is not matched, comparing the transient current amplitude with the short-circuit fault current amplitude, if the comparison result is not matched, comparing the transient characteristic power parameter with the load on-off transient power parameter of the corresponding room in the characteristic database by the MCU, when the comparison result is basically matched, obtaining an electric appliance on-off identification result, and repeating the step 2; when the transient current amplitude is matched with the comparison result of the short-circuit fault current amplitude, the MCU judges that the room has a short-circuit fault, and identifies the electric appliance fault;
(4) electric appliance fault identification: the MCU compares the transient characteristic power parameters with load fault transient power parameters of corresponding rooms in the characteristic database, realizes fault electrical appliance identification when the comparison results are basically matched, and sends corresponding room position information and fault electrical appliance identification information to the touch display screen for display and simultaneously sends the room position information and the fault electrical appliance identification information to the user software system through the communication module.
The digital transmitter collects electricity utilization data of a room and sends the electricity utilization data to the characteristic data collection module, and the electricity utilization data comprise parameters such as voltage, current, frequency, power factor and harmonic.
The communication module is a GPRS communication module.
The MCU is connected with a data center of a host computer on the Internet through a communication module, after the IP (or domain name) and the port of the data center are set, the positioning device dials to connect with the Internet through a wireless network, and then connection of the configured IP and the port (namely the monitoring port of the mServer) is initiated. The positioning device sends the corresponding room position information, the identification information of the fault electric appliance and other data to the host computer on the Internet. The user software system is connected to the mServer through interfaces such as a serial port, wireless and bidirectional data communication from the user equipment to the user software system is further achieved, and the user software system comprises household appliance monitoring software. The household appliance monitoring software is connected to the mServer through interfaces such as a virtual serial port and the like, and is mapped to the terminal of the RS232 channel (or RS485 channel) number corresponding to the module, so that wireless and bidirectional data communication from the user serial port device to the household appliance monitoring software is realized.
Therefore, the fault positioning system of the low-voltage electric equipment based on the electric energy metering technology is obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The utility model provides a low pressure consumer fault location system based on electric energy measurement technique which characterized in that: the device comprises a positioning device, wherein the positioning device comprises an MCU (microprogrammed control Unit), a characteristic data acquisition module, a characteristic database, a touch display screen, a communication module and a power supply module; the input end of the characteristic data acquisition module is respectively connected with the digital transmitter of each room and the metering module of the electric energy meter, the output end of the characteristic data acquisition module, the characteristic database, the display screen and the communication module are all connected with the MCU, the communication module is connected with the user software system, wherein,
the metering module of the intelligent electric energy meter samples current and voltage waveform data of the whole house electrical equipment in real time, and the metering module sends the data to the characteristic data acquisition module;
the digital transmitter is used for transmitting the electricity utilization data of the room to the characteristic data acquisition module;
the characteristic data acquisition module is used for preprocessing data sent by the metering module and the digital transmitter, filtering abnormal data and sending all the data to the MCU;
the MCU is used for processing the data acquired by the metering module and extracting fault signal characteristic quantities of the electrical equipment through a wavelet analysis algorithm, wherein the fault signal characteristic quantities comprise load steady-state power parameters, load on-off transient state power parameters, load fault transient state power parameters, room steady-state current amplitude values and short-circuit fault current amplitude values; extracting transient characteristic power parameters and transient current amplitude values from data collected by a digital transmitter; analyzing and comparing the transient current amplitude with the steady-state current amplitude of the corresponding room in the characteristic database, and judging no fault when the comparison result is basically matched; when the comparison result is not matched, comparing the transient current amplitude with the short-circuit fault current amplitude, and if the comparison result is not matched, comparing the transient characteristic power parameter with the load on-off transient power parameter of the corresponding room in the characteristic database to obtain an electric appliance on-off identification result; when the transient current amplitude is matched with the comparison result of the short-circuit fault current amplitude, judging that the room has a short-circuit fault, and identifying the fault of the electric appliance; the transient characteristic power parameters are compared with load fault transient power parameters of corresponding rooms in a characteristic database, and when the comparison results are basically matched, the fault electric appliance identification is realized;
a characteristic database for storing the characteristic quantity of the fault signal;
the power supply module is used for supplying power to the display screen, the MCU and the communication module;
the communication module is used for sending the corresponding room position information and the corresponding fault electric appliance identification information to the user software system;
and the display screen displays the identification information of the fault electric appliance and the corresponding room position information.
2. A fault location system for low voltage users according to claim 1, wherein: a main air switch is arranged on a main circuit of each room and is connected with a load at the tail end of the circuit through a digital transmitter; an end air switch is provided between the load and the digital transmitter.
3. A fault location system for low voltage users according to claim 1, wherein: the positioning device is further provided with a UPS power supply, the power supply module supplies power to the UPS power supply, and when the power supply module cannot normally output power, the UPS power supply supplies power to the touch display screen, the MCU and the communication module.
4. A fault location system for low voltage users according to claim 1, wherein: the communication module is a GPRS communication module.
5. A fault location system for low voltage users according to claim 1, wherein: the display screen is a touch display screen.
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