CN1438488A - Intelligent network multifunction full-electronic electric meter of preventing fraudulent use of electricity - Google Patents
Intelligent network multifunction full-electronic electric meter of preventing fraudulent use of electricity Download PDFInfo
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Abstract
The electrical energy meter comprises following modules: the switching module for sampling voltages and currents in electrical network, the module for detecting open/short circuit of the current transformer, the module for measuring electrical energy, the harmonic analysis module, the amplitude analysis module, the phase analysis module, the judgement module of intelligent fault analysis, the data recording module, the stats display module, the data communication module, the clock module, the power source module and the parameter setting module. The invention realizes the integrated functions of measuring electrical energy, the network data transmission and the network communication basically. It is the all-electric type energy meter with various usages.
Description
Affiliated technical field
The invention belongs to the electric power meter in the electric system, particularly relate to the anti-electricity-theft multi-functional full electronic electric energy meter of a kind of intelligent network.
Background technology
Electric energy metrical mode of the prior art, normally used have several electric energy meters such as induction type, electronic type, multi-functional full electronic.Induction type electric energy meter, electronic electric energy meter generally only have active energy metering and reactive energy function of measuring; Multi-functional full-electronic electric energy meter is except that the function with induction type electric energy meter, electronic electric energy meter, also have many rate meterings, forward and reverse meritorious, reactive measurement, electrical network parameter measurement, electric weight statistics, standard serial port communication and pulse output and partial fault or false wiring monitoring function.
The electric energy metrical malfunction monitoring mode of multi-functional full-electronic electric energy meter general only detects voltage or current amplitude and phase place.On detection method, usually all be to judge whether decompression of electric energy metrical according to the height of line voltage amplitude; Or judge whether defluidization of electric energy metrical according to the size of power network current amplitude; Or judge whether wiring error of electric energy metrical according to the phase relation of voltage and current; According to detecting and judged result the fault-time and the number of stoppages of record electric power meter.
The data transfer mode of multi-functional full-electronic electric energy meter, usually only have standard serial port, far infrared delivery outlet or pulse delivery outlet, need by means of the far infrared meter-copy device in the use, or the centralized automatic meter-reading device, or utilize power carrier and wire telephony could realize data remote or network service.
Along with the needs of power distribution web development and electric-power metering technology and modern management, existing electric energy meter has the following disadvantages: 1) the electric energy metrical function singleness of electric energy meter; 2) anti-stealing electricity function of electric energy meter is only monitored at electric current and voltage amplitude or phase place, can not be comprehensive realization detect and the record electric energy metrical in various data and fault, for the accurately judgement of fault type, failure mode, accurate Calculation and reliable record; Then can't accurately judge and record for fault such as electricity consumption or abnormal occurrence before the current transformer open circuit in the electric energy metrical or short circuit, the table; 3) the network communications capability difference of electric energy meter or do not possess network communications capability is difficult to realize preferably data remote and network service.
Summary of the invention
The anti-electricity-theft multi-functional full electronic electric energy meter of a kind of intelligent network that provides at the deficiencies in the prior art is provided.This electric energy meter can solve metering and the single defective of measuring ability in the existing electric energy meter effectively, can realize multiple functions such as multifunctional electric energy metering, Harmonic Detection, Power Quality Detection.
Another object of the present invention provides the anti-electricity-theft multi-functional full electronic electric energy meter of a kind of intelligent network, this electric energy meter can solve effectively that electric energy metrical failure detection intelligent degree is low in the existing electric energy meter, adaptive faculty is poor, can not accurately intactly detect and write down the defectives such as type, mode of abnormal operating condition in the electric energy metrical and fault, state such as electricity consumption before height that can real-time online detection of grid voltage, size, electric current and voltage phase sequence and the phase place of electric current, wiring error, the table; And can accurately judge electric energy metrical whether decompression, shunting, negative phase sequence, misphase position etc. according to testing result; Can be under the various methods of operation of high and low voltage electric distribution electrical network, Intelligent Measurement and judge current transformer whether short circuit or open circuit; Record also shows beginning and ending time of all faults and separate.
A further object of the present invention provides the anti-electricity-theft multi-functional full electronic electric energy meter of a kind of intelligent network, this electric energy meter adopts based on mobile communications networks such as GSM, GPRS, CDMA, utilize mobile short-message or number biography mode, data messages such as electric degree number, Harmonic Detection, Power Quality Detection, metering fault are uploaded to master station or relevant management of power use department in real time, fast, solve network service and data remote ability in the existing electric energy meter effectively, be difficult to key issues such as realization is real-time, rapid data transmission.Purpose of the present invention also has advantages such as the networking investment is little, cycle weak point, wireless data real-time Transmission, fault Realtime Alerts, and can satisfy the needs of wireless centralized automatic meter-reading and load monitoring.
The technical solution adopted for the present invention to solve the technical problems is:
The anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network, it is provided with module modules such as (13) and is formed by line voltage current transformation sampling module (1), current transformer open circuit short-circuit detecting module (2), electric energy metrical module (3), frequency analysis module (4), amplitude analysis module (5), phase analysis module (6), intelligent trouble analysis and judgement module (7), data recordin module (8), state display module (9), data communication module (10), clock module (11), power module (12), parameter.Wherein: line voltage current transformation sampling module (1) is used for line voltage and electric current are sampled, and provides electric current and voltage amplitude and phase signal to electric energy metrical module (3), frequency analysis module (4), amplitude analysis module (5), phase analysis module (6); Current transformer open circuit short-circuit detecting module (2) is used for current transformer short circuit or open fault are detected, and provides current transformer short circuit or open fault signal to intelligent trouble analysis and judgement module (7).
Electric energy metrical module (3) links to each other with line voltage current transformation sampling module (1), clock module (11), is used for calculating using power consumption, and provides data such as meritorious electric weight, capacity of idle power to data recordin module (8) and data disaply moudle (9).Frequency analysis module (4) links to each other with line voltage current transformation sampling module (1), the voltage and current signal that line voltage current transformation sampling module (1) is provided, after adopting fft algorithm to carry out fast Flourier computing, analyzing and processing, provide data such as each harmonic content and aberration rate in line voltage, the electric current, and deliver to data recordin module (8) and data disaply moudle (9).
Amplitude analysis module (5) links to each other with line voltage current transformation sampling module (1), voltage and current amplitude signal that line voltage current transformation sampling module (1) is provided carry out analytical calculation, when faults such as decompression, under-voltage, defluidization appear in electric energy metrical, provide the fault signature data-signal to intelligent trouble analysis and judgement module (7).Phase analysis module (6) links to each other with line voltage current transformation sampling module (1), voltage and current phase signal that line voltage current transformation sampling module (1) is provided carry out analytical calculation, when voltage negative phase sequence, electric current and voltage misphase, fault such as anti-phase appear in electric energy metrical, provide the fault signature data-signal to intelligent trouble analysis and judgement module (7).
Intelligent trouble analysis and judgement module (7) and current transformer open circuit short-circuit detecting module (2), amplitude analysis module (5), phase analysis module (6) links to each other, when electric energy metrical breaks down, intelligent trouble analysis and judgement module (7) is to the current transformer open circuit and the short trouble signal of current transformer open circuit short-circuit detecting module (2) output, the electric current and voltage amplitude fault-signal of amplitude analysis module (5) output, and the electric current and voltage phase fault signal of phase analysis module (6) output carry out intellectual analysis and comprehensive judge after, accurately provide failure mode, separate failure message such as grade takes place and deliver to data recordin module (8), state display module (9), data communication module (10) carries out data recording, show, realize uploading in real time warning.
Data recordin module (8) is provided with module (13) with electric energy metrical module (3), frequency analysis module (4), intelligent trouble analysis and judgement module (7), clock module (11), parameter and links to each other, be used for writing down the electric energy metrical fault data of data such as the line voltage electric current each harmonic content of various electric energy measurement datas, frequency analysis module (4) output of electric energy metrical module (3) output and aberration rate, intelligent trouble analysis and judgement module (7) output, and the beginning and ending time of record electric energy metrical fault.Data recordin module (8) also is used for record and preserves parameter the set electric energy meter operational parameter data of module (13) is set.Record data can pass through data disaply moudle (9) and realize data presentation, and realize data remote by data communication module (10).
Data disaply moudle (9) is made up of Chinese character base and Chinese character LCD two parts.Data disaply moudle (9) links to each other with electric energy metrical module (3), frequency analysis module (4), intelligent trouble analysis and judgement module (7), data recordin module (8), clock module (11), shows or show data such as electric energy metrical, metering fault, harmonic content and aberration rate in real time with Chinese character and digital dual mode when consulting.Data communication module (10) links to each other with intelligent trouble analysis and judgement module (7), data recordin module (8), clock module (11).By communication network module (10),, realize the timing of electric energy measurement data is made a copy of and made a copy of in real time according to the communication protocol of correlation standard; When electric energy metrical breaks down, in time send failure message to master station or relevant management of power use department, reach to the electric energy metrical fault carry out in real time, the purpose of Rapid Alarm; Communication network module (10) receives master station and the instruction that Surveillance center of relevant management of power use department computing machine sends, and the clock of clock module (11) is proofreaied and correct, and controlled variable is provided with the operational factor that module (13) is provided with electric energy meter.Communication network module (10) also can provide various data recording information in the data recordin module (8) to master station and relevant management of power use department.
Clock module (11) is used to that each needs the module of clock signal that reference clock signal is provided in the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network.Power module (12) provides working power for the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network, include supply convertor, voltage stabilizer and backup battery group in the relevant components and parts of working power, when the anti-electricity-theft multi-functional full electronic electric energy meter dead electricity of intelligent network, power module (12) automatically starting back-up source makes the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network remain operate as normal.Parameter is provided with the operational factor that module (13) is used to be provided with, revise electric energy meter.
Description of drawings
Accompanying drawing 1 is a modular structure block diagram of the present invention.
Embodiment
Be described as follows below in conjunction with the principle of work of accompanying drawing the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network of the present invention:
Line voltage current transformation sampling module (1) is used for the amplitude phase place of the amplitude phase place of electrical network phase voltage and electrical network phase current is carried out conversion and sampling.Its transform method can be following several mode:
A. by voltage transformer (VT) and current transformer electrical network forceful electric power amplitude phase signal is transformed to light current amplitude phase signal;
B. by voltage transmitter and current transducer electrical network forceful electric power amplitude phase signal is transformed to light current amplitude phase signal;
C. by voltage sensor and current sensor electrical network forceful electric power amplitude phase signal is transformed to light current amplitude phase signal;
D. by voltage divider and current diverter electrical network forceful electric power amplitude phase signal is transformed to light current amplitude phase signal.
Line voltage current transformation sampling module (1) is by above method or mode, to the light current electric current and voltage amplitude phase signal after the conversion amplify, filtering, shaping, frequency conversion, synchronously, sampling processing such as A/D conversion, and the amplitude phase signal after will handling exports to electric energy metrical module (3) and frequency analysis module (4) respectively, and the amplitude signal after will handling simultaneously exports to amplitude analysis module (5), the phase signal after will handling is exported to phase analysis module (6).
Current transformer open circuit short-circuit detecting module (2) is used for short circuit of electric energy metrical current transformer or open fault are detected.Current transformer open circuit short-circuit detecting module (2) applies the detection pumping signal to metering current mulual inductor, and the detection pumping signal that provides forms feedback signal in the metering current mulual inductor loop; Current transformer open circuit short-circuit detecting module (2) with feedback signal amplify, filtering, shaping, processing such as synchronous, and the feedback signal after the divisional processing exported to intelligent trouble analysis and judgement module (7).
Electric energy metrical module (3) is used to finish data computation such as active energy metering, reactive energy metering, maximum demand, timesharing electric weight, load curve, reaches and satisfy the requirement of multifunctional electric energy metering.And all computational datas are exported to data recordin module (8) and data disaply moudle (9).
Frequency analysis module (4) is used for analyzing electrical network voltage harmonic and current harmonics, after the electric current and voltage amplitude phase signal that adopts vector calculus and Fourier transform scheduling algorithm that line voltage current transformation sampling module (1) is provided is handled, accurately calculate data such as each harmonic content and resultant distortion rate in the electrical network, and above data are exported to logging modle (8) and data disaply moudle (9).
Amplitude analysis module (5) is from the electric current and voltage amplitude signal that line voltage current transformation sampling module (1) provides, adopt vector calculus and Fourier transform scheduling algorithm, isolate electrical network 50Hz fundamental voltage current amplitude signal, and 50Hz fundamental voltage current amplitude signal is carried out exporting to intelligent trouble analysis and judgement module (7) after the analyzing and processing.
Phase analysis module (6) is from the electric current and voltage phase signal that line voltage current transformation sampling module (1) provides, adopt vector calculus and Fourier transform scheduling algorithm, isolate electrical network 50Hz fundamental voltage current phase signal, and 50Hz fundamental voltage current phase signal is carried out exporting to intelligent trouble analysis and judgement module (7) after the analyzing and processing.
The current transformer feedback signal that provided by current transformer open circuit short-circuit detecting module (2) is provided intelligent trouble analysis and judgement module (7), the line voltage current amplitude signal that is provided by amplitude analysis module (5) and the line voltage current phase signal that is provided by phase analysis module (6).Intelligent trouble analysis and judgement module (7) adopts adaptive algorithm to the feedback signal that current transformer open circuit short-circuit detecting module (2) provides, in feedback signal complicated and changeable, extract current transformer short circuit or open fault characteristic signal, according to current transformer short circuit or open fault characteristic signal, intellectual analysis judge current transformer once or secondary coil whether exist damage, secondary circuit whether to have open circuit or fault such as short circuit, and failure mode is carried out Classification and Identification by separate and type.The line voltage current amplitude signal that intelligent trouble analysis and judgement module (7) provides amplitude analysis module (5), and the line voltage current phase signal that provides of phase analysis module (6), according to the size of electric current and voltage amplitude, intellectual analysis judges whether electric energy metrical exists faults such as decompression, under-voltage, defluidization; And according to the phase relation between each phase voltage and the electric current, whether the intelligent decision electric energy metrical exists voltage negative phase sequence, electric current misphase, current transformer once or fault such as secondary is anti-phase, and failure mode is carried out Classification and Identification by separate and type.And all fault judgement results are exported to data recordin module (8), data disaply moudle (9) and data communication module (10).
Data recordin module (8) is provided with under the common control of module (13) in electric energy metrical module (3), frequency analysis module (4), intelligent trouble analysis and judgement module (7), clock module (11), parameter, the separate accurate recording that carries out takes place in zero-time and concluding time, failure mode, fault to electric energy measurement data, mains by harmonics data, electric energy metrical fault, and recording parameters is provided with the electric energy meter operational factor that module (13) is provided with, as: parameters such as the time-shared charge period value of setting, the time value of setting of checking meter, the electric weight freeze-off time value of setting.All record data all have password and power-down protection.The data recording of data recordin module (8) can be exported to data disaply moudle (9) or export to data communication module (10) as required.
Clock module (11), be used for providing current time and timing signal to the various modules of time data that need of the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network, clock module (11) can receive the correcting delay signal that data communication module (10) provides, and realizes clock check and correction function.
Data disaply moudle (9) comprises Chinese character base and Chinese character LCD.The current dynamic time data that data disaply moudle (9) can read clock module (11) provides, and all data in the video data logging modle (8), show the real-time electric quantity data that electric energy metrical module (3) provides in real time, show the real time fail information that intelligent trouble analysis and judgement module (7) provides in real time.Wherein: literal shows that in the Chinese character mode numerical value shows with digital form.
The way of output of data communication module (10) includes the communication based on mobile radio communication (GSM, GPRS, CDMA), can constitute wireless data communication network simple in structure, cheap, that reliability is high, easy to use, finish multiple functions such as power load monitoring, automatic data logging.The way of output of data communication module (10) also includes multiple interfaces such as RS232, RS485, far-infrared communication and pulse output, can be connected with various data receivers easily, realizes data remote and network service.Data communication module (10) is with the fault data of intelligent trouble analysis and judgement module (7) output, communication protocol according to the rules, when electric energy metrical breaks down, in time send failure message to master station or relevant management of power use department, to the electric energy metrical fault carry out in real time, Rapid Alarm; Data communication module (10) can be to all record data in master station or the relevant management of power use department's transmission data recordin module (8), and can receive master station or relevant management of power use departmental instruction, controlled variable is provided with module (13), and the operational factor of electric energy meter is provided with.Data communication module (10) also can carry out the clock check and correction to clock module (11).
Power module (12) is used to the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network that working power is provided, and wherein includes supply convertor, voltage stabilizer and backup battery group in the relevant components and parts of working power.The working power of the anti-electricity-theft multi-functional full electronic electric energy meter of power module (12) monitoring intelligent networking in real time.When the anti-electricity-theft multi-functional full electronic electric energy meter dead electricity of intelligent network, power module (12) automatically starting back-up source.
Parameter is provided with module (13) and is used for being provided with, revising the anti-electricity-theft multi-functional full electronic electric energy meter operational factor of intelligent network, and the mode that is provided with, revises can be that the scene is provided with or control far away is provided with.
The anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network provided by the invention, functions such as electric energy metrical, anti-electricity-theft and false wiring fault detect, network data transmission are organically combined, fundamentally realized the integrated of electric energy metrical, anti-electricity-theft, network data transmission and network service.This electric energy meter is rational in infrastructure, simple and practical, reliability is high, multifunctional electric energy metering, the detection of metering fault real-time online, fault type, beginning and ending time and separate record and demonstration can realized under various running environment, and the teletransmission of data such as electric energy metrical, Harmonic Detection, Power Quality Detection and electric energy metrical fault alarm real-time, be a kind of broad-spectrum full electronic electric energy meter.
Claims (8)
1. anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network, it is by line voltage current transformation sampling module (1), current transformer open circuit short-circuit detecting module (2), electric energy metrical module (3), frequency analysis module (4), amplitude analysis module (5), phase analysis module (6), intelligent trouble analysis and judgement module (7), data recordin module (8), state display module (9), data communication module (10), clock module (11), power module (12), parameter is provided with module modules such as (13) and forms, it is characterized in that, electric energy metrical module (3) and line voltage current transformation sampling module (1), clock module (11) links to each other, be used for calculating and use power consumption, and provide meritorious electric weight to data recordin module (8) and data disaply moudle (9), data such as capacity of idle power; Frequency analysis module (4) links to each other with line voltage current transformation sampling module (1), the voltage and current signal that line voltage current transformation sampling module (1) is provided, after adopting fft algorithm to carry out fast Flourier computing, analyzing and processing, provide data such as each harmonic content and aberration rate in line voltage, the electric current, and deliver to data recordin module (8) and data disaply moudle (9); Intelligent trouble analysis and judgement module (7) and current transformer open circuit short-circuit detecting module (2), amplitude analysis module (5), phase analysis module (6) links to each other, when electric energy metrical breaks down, intelligent trouble analysis and judgement module (7) is to the current transformer open circuit and the short trouble signal of current transformer open circuit short-circuit detecting module (2) output, the electric current and voltage amplitude fault-signal of amplitude analysis module (5) output, and the electric current and voltage phase fault signal of phase analysis module (6) output carries out intellectual analysis and the comprehensive kind that provides the electric energy metrical fault after judging, take place separate, and deliver to data recordin module (8), state display module (9), data communication module (10), carry out data recording, show, realize uploading in real time warning; Data communication module (10) links to each other with intelligent trouble analysis and judgement module (7), data recordin module (8), clock module (11), by communication network module (10), according to the communication protocol of correlation standard, realize the timing of electric energy measurement data is made a copy of and made a copy of in real time; When electric energy metrical breaks down, in time send failure message to master station or relevant management of power use department; Communication network module (10) receives master station and the instruction that Surveillance center of relevant management of power use department computing machine sends, and the clock of clock module (11) is proofreaied and correct, and controlled variable is provided with the operational factor that module (13) is provided with electric energy meter; Communication network module (10) also can provide various data recording information in the data recordin module (8) to master station and relevant management of power use department.
2. the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network according to claim 1, it is characterized in that, line voltage current transformation sampling module (1) is used for line voltage and electric current are sampled, and provides electric current and voltage amplitude and phase signal to electric energy metrical module (3), frequency analysis module (4), amplitude analysis module (5), phase analysis module (6); Current transformer open circuit short-circuit detecting module (2) is used for current transformer short circuit or open fault are detected, and provides current transformer short circuit or open fault signal to intelligent trouble analysis and judgement module (7).
3. the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network according to claim 1, it is characterized in that, amplitude analysis module (5) links to each other with line voltage current transformation sampling module (1), voltage and current amplitude signal that line voltage current transformation sampling module (1) is provided carry out analytical calculation, when faults such as decompression, under-voltage, defluidization appear in electric energy metrical, provide the fault signature data-signal to intelligent trouble analysis and judgement module (7); Phase analysis module (6) links to each other with line voltage current transformation sampling module (1), voltage and current phase signal that line voltage current transformation sampling module (1) is provided carry out analytical calculation, when voltage negative phase sequence, electric current and voltage misphase, fault such as anti-phase appear in electric energy metrical, provide the fault signature data-signal to intelligent trouble analysis and judgement module (7).
4. the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network according to claim 1, it is characterized in that, data recordin module (8) and electric energy metrical module (3), frequency analysis module (4), intelligent trouble analysis and judgement module (7), clock module (11), parameter is provided with module (13) and links to each other, be used to write down the various electric energy measurement datas of electric energy metrical module (3) output, data such as each harmonic content and aberration rate in the line voltage electric current of frequency analysis module (4) output, the electric energy metrical fault data of intelligent trouble analysis and judgement module (7) output, and the beginning and ending time of record electric energy metrical fault; Data recordin module (8) also is used for record and preserves parameter the set electric energy meter operational parameter data of module (13) is set.
5. according to claim 1, the anti-electricity-theft multi-functional full electronic electric energy meter of 4 described intelligent networks, it is characterized in that data disaply moudle (9) is made up of Chinese character base and Chinese character LCD two parts; Data disaply moudle (9) links to each other with electric energy metrical module (3), frequency analysis module (4), intelligent trouble analysis and judgement module (7), data recordin module (8), clock module (11), shows or show data such as electric energy metrical, metering fault, harmonic content and aberration rate in real time with Chinese character and digital dual mode when consulting.
6. according to claim 1,4, the anti-electricity-theft multi-functional full electronic electric energy meter of 5 described intelligent networks, it is characterized in that clock module (11) is used to that each needs the module of clock signal that reference clock signal is provided in the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network.
7. the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network according to claim 1, it is characterized in that, power module (12) provides working power for the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network, also include supply convertor, voltage stabilizer and backup battery group in the relevant components and parts of working power, when the anti-electricity-theft multi-functional full electronic electric energy meter dead electricity of intelligent network, power module (12) automatically starting back-up source makes the anti-electricity-theft multi-functional full electronic electric energy meter of intelligent network remain operate as normal.
8. according to claim 1, the anti-electricity-theft multi-functional full electronic electric energy meter of 4 described intelligent networks, it is characterized in that parameter is provided with the operational factor that module (13) is used to be provided with, revise electric energy meter.
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| CN101098375B (en) * | 2006-06-30 | 2010-05-12 | 深圳市科陆电子科技股份有限公司 | Device and method for detecting short circuit warning function of energy management terminal |
| WO2010082808A2 (en) * | 2009-01-13 | 2010-07-22 | Escobar Castelo Jose Eduardo | System for the remote control and management of electric power |
| CN101006348B (en) * | 2004-04-18 | 2011-01-05 | 埃莱斯派克工程有限公司 | Power quality monitory |
| CN101382588B (en) * | 2008-09-22 | 2011-03-30 | 慈溪伟吉电子有限公司 | Three phase harmonic standard electric energy meter |
| CN102004182A (en) * | 2010-09-29 | 2011-04-06 | 思源电气股份有限公司 | System and implementation method for monitoring grounding current of transformer core on line |
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| CN102890179A (en) * | 2012-10-30 | 2013-01-23 | 中华人民共和国上海出入境检验检疫局 | Harmonic current test system with novel current converter |
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| CN106405226A (en) * | 2016-08-31 | 2017-02-15 | 浙江恒业电子有限公司 | Harmonic wave extraction-based intelligent ammeter system for frequency spectrum leakage suppression |
| CN109213812A (en) * | 2018-08-06 | 2019-01-15 | 宁波三星智能电气有限公司 | A kind of fault test display methods of electric energy meter |
| CN109816968A (en) * | 2019-01-17 | 2019-05-28 | 安徽云探索网络科技有限公司 | A kind of household electricity network monitoring system |
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| CN101006348B (en) * | 2004-04-18 | 2011-01-05 | 埃莱斯派克工程有限公司 | Power quality monitory |
| CN101098375B (en) * | 2006-06-30 | 2010-05-12 | 深圳市科陆电子科技股份有限公司 | Device and method for detecting short circuit warning function of energy management terminal |
| CN101382588B (en) * | 2008-09-22 | 2011-03-30 | 慈溪伟吉电子有限公司 | Three phase harmonic standard electric energy meter |
| WO2010082808A2 (en) * | 2009-01-13 | 2010-07-22 | Escobar Castelo Jose Eduardo | System for the remote control and management of electric power |
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