CN109725279A - A kind of electric energy metering device compares synthetical error analysis platform online - Google Patents
A kind of electric energy metering device compares synthetical error analysis platform online Download PDFInfo
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- CN109725279A CN109725279A CN201811599174.9A CN201811599174A CN109725279A CN 109725279 A CN109725279 A CN 109725279A CN 201811599174 A CN201811599174 A CN 201811599174A CN 109725279 A CN109725279 A CN 109725279A
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Abstract
The invention discloses a kind of electric energy metering devices to compare synthetical error analysis platform, including traditional electric energy metering device on-line monitoring system, wideband electric energy metering device on-line monitoring system, Data Analysis Platform and substation's clock server online；The output end of the first on-line monitoring host of output end connection and the second on-line monitoring host of substation's clock server, the first on-line monitoring host and the second on-line monitoring host connects Data Analysis Platform；The Data Analysis Platform is analyzed and is compared in real time to traditional electric energy metering device on-line monitoring system and the corresponding energy measurement information of wideband electric energy metering device on-line monitoring system, obtains the error of electric energy metering device on-line monitoring system.The present invention can absorb the electric impurity of continuous wide spectrum, be affected by the external environment small, guarantee measurement accuracy, it is ensured that the reliability and accuracy of existing electric energy metered system measurement.
Description
Technical field
The present invention relates to a kind of electric energy metering devices to compare synthetical error analysis platform online, belongs to measurement of power inspection
Survey technology field.
Background technique
With the continuous expansion of power grid scale, energy metering device quantity is also being continuously increased, and week is examined as defined in regulation
Phase otherwise excessively frequently, such as the field test of progress in I class metering device 3 months, a large amount of human and material resources, and two need to be put into
Energy metering device operating status and uncontrollable between secondary field-checking；Period is too long, such as the scene of electromagnetic transformer
Re-testing periods are 10 years, can not promptly and accurately grasp the operating status of equipment.
Current electric energy metering system is only acquired electric energy meter information about power, can not be to the error of electric energy meter
Real-time monitoring is carried out with overall operation situation and metering secondary, it is difficult to meet the needs of critical point management.
Summary of the invention
Purpose be to solve existing electric energy metering device it is not high to the stability of mutual inductor and related secondary circuit measurement,
The not high problem of reliability, it is an object of the present invention to provide a kind of electric energy metering devices to compare synthetical error analysis platform online, comes
Ensure the reliability and accuracy of existing electric energy metered system measurement.
To achieve the goals above, the present invention is to realize by the following technical solutions:
A kind of electric energy metering device of the invention compares synthetical error analysis platform, including traditional electric energy metering device online
On-line monitoring system, wideband electric energy metering device on-line monitoring system, Data Analysis Platform and be used for wideband electric energy metering device
The on-line monitoring system substation clock synchronous with the energy measurement information of traditional electric energy metering device on-line monitoring system acquisition
Server；The tradition electric energy metering device on-line monitoring system includes traditional electric energy metering device, PT points of the second on-line monitoring
Machine, the second on-line monitoring CT extension set and the second on-line monitoring host；The wideband electric energy metering device on-line monitoring system includes
Wideband electric energy metering device, the first on-line monitoring PT extension set, the first on-line monitoring CT extension set and the first on-line monitoring host；It is described
Wideband electric energy metering device includes the first PT terminal box, the first CT terminal box, the wideband electricity being mounted on inside the first PT terminal box
Press mutual inductor, the wideband current transformer and wideband electric energy meter being mounted on inside the first CT terminal box；First on-line monitoring
The input terminal of PT extension set is connected with the output end of wideband voltage transformer, the input terminal phase of output end and the first on-line monitoring host
Even；It is described first on-line monitoring CT extension set input terminal be connected with the output end of wideband current transformer, output end and first
The input terminal that line monitors host is connected；The input terminal connection secondary circuit electric energy table side and wideband electric energy of first on-line monitoring host
The output end of table；The first on-line monitoring host of output end connection of substation's clock server and the second on-line monitoring master
The output end of machine, the first on-line monitoring host and the second on-line monitoring host connects Data Analysis Platform；The data point
Platform is analysed to traditional electric energy metering device on-line monitoring system and the corresponding electric energy of wideband electric energy metering device on-line monitoring system
Metrical information is analyzed and is compared in real time, obtains the error of electric energy metering device on-line monitoring system.
The energy measurement information includes electric energy meter error, PT secondary voltage drop, Secondary Load of Voltage Transformer, Current Mutual Inductance
Device secondary load and power quality.
Above-mentioned tradition electric energy metering device includes the 2nd PT terminal box, the 2nd CT terminal box, is mounted on the 2nd PT terminal box
The electromagnetic potential transformer of inside, the electromagnetic current transducer and electric energy meter being mounted on inside the 2nd CT terminal box；It is described
The input terminal of second on-line monitoring PT extension set is connected with the output end of electromagnetic potential transformer, output end and the second on-line monitoring
The input terminal of host is connected；The output end phase of the input terminal and electromagnetic current transducer of the second on-line monitoring CT extension set
Even, output end is connected with the input terminal of the second on-line monitoring host；The input terminal of second on-line monitoring host connects secondary circuit
The output end of end and electric energy meter.
Above-mentioned electromagnetic potential transformer/electromagnetic current transducer is installed in series in wideband voltage transformer/wideband electricity
On current transformer the same circuit.
Above-mentioned substation's clock server connect transmitting clock with the first on-line monitoring host and the second on-line monitoring host
Information；The first on-line monitoring host uses between the first on-line monitoring PT extension set and the first on-line monitoring CT extension set respectively
Wired or wireless transmission mode transmits clock information；Similarly, the second on-line monitoring host monitors PT on-line with second respectively
Clock information is also transmitted using wired or wireless transmission mode between extension set and the second on-line monitoring CT extension set.
Above-mentioned wired or wireless transmission mode is low voltage power line carrier synchronous communication, radio communication or ethernet communication side
Formula.
Above-mentioned wideband electric energy metering device on-line monitoring system and traditional electric energy metering device on-line monitoring system are mounted on
Same metering node.
Above-mentioned first on-line monitoring PT extension set, the second on-line monitoring PT extension set, the first on-line monitoring CT extension set and second exist
Line monitors CT extension set and distinguishes real-time online measuring mutual inductor secondary load, and time scale information is marked to be sent to corresponding on-line monitoring
It is the secondary load of mutual inductor in host.
At above-mentioned first on-line monitoring PT extension set, the second on-line monitoring PT extension set On-line sampling system secondary circuit starting point
The voltage value of synchronization, extracts the amplitude and phase of two paths of signals respectively, and marks time scale information, first on-line monitoring
PT extension set, the second on-line monitoring PT extension set are pooled to the amplitude and phase value of measurement in corresponding on-line monitoring host, simultaneously
Wideband electric energy meter/electric energy meter is pooled to the amplitude and phase value of measurement in corresponding on-line monitoring host, calculates two-way letter
Number ratio difference and angular difference, be secondary circuit voltage drop；Monitor on-line host measure in same period secondary circuit end and
The electric flux of corresponding electric energy meter, and time scale information is marked, the difference between the two is the error of electric energy meter.
The measurement method of above-mentioned secondary circuit voltage drop is as follows:
At the first on-line monitoring PT extension set/second on-line monitoring PT extension set On-line sampling system secondary circuit starting point
The voltage value of synchronization, extracts the amplitude and phase of two paths of signals respectively, and marks time scale information, first on-line monitoring
The amplitude and phase value of measurement are pooled to phase with wire transmission or wireless transmission method by PT extension set/second on-line monitoring PT extension set
In the on-line monitoring host answered, while wideband electric energy meter/electric energy meter collects the amplitude and phase value of measurement by wired mode
Into corresponding on-line monitoring host, the ratio difference and angular difference of two paths of signals are calculated.
It is above-mentioned first on-line monitoring host and second on-line monitoring host distinguish real-time, error free or error negligibly with
The mode of wired or wireless communication has the same period or synchronization of sampling or detection the electrical energy measurement of time scale information
Information taken is to Data Analysis Platform.
Above-mentioned Data Analysis Platform extracts the same class energy measurement information of synchronization two paths of signals, calculates wideband in real time
Error of the electric energy metering device on-line monitoring system relative to traditional electric energy metering device on-line monitoring system.
Electric energy metering device of the present invention compares synthetical error analysis platform online, has the beneficial effect that:
It (1), being capable of long-term real-time online acquisition electricity by the on-Line Monitor Device in each key position installation of substation
The operation data of energy metering device.
(2) substation's clock server, stringent synchronization wideband electric energy metering device on-line monitoring system and tradition electricity are used
The sampled data of energy metering device on-line monitoring system, guarantees target data when the analyzed data of Data Analysis Platform are same,
Ensure the accuracy of continuous data.
(3) the traditional electric energy metered system of the present invention is using a set of stability and the higher electromagnetic transformer of reliability as ginseng
Standard is examined, is compared with the measurement error of wideband electric energy metering device on-line monitoring system, is substantially increased than alignment
Exactness and reliability.
(4) communication mode is flexible between primary side device and secondary side device of the present invention, and selection wireless communication avoids multiple
Miscellaneous connecting line ensure that the safety of operator there is no the Insulation Problems between primary equipment, secondary device, while not
Connecting line is needed, the conveniently moving in the more power transformation stage space of equipment is surveyed convenient for the voltage transformer to different location
Examination.
(5) present invention can be to electric energy meter error, PT secondary voltage drop, voltage current transformer secondary load and power quality
Five indices carry out real-time online detection (being calculated by real time on-line monitoring data), and are carried out by Data Analysis Platform
Analysis is compared comprehensively.
(6) wideband electric energy metering device on-line monitoring system uses wideband mutual inductor, can absorb the electricity of continuous wide spectrum
Impurity, fast response time are affected by the external environment small, and mutual inductor loss is small, fully ensure that the precision of measurement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that electric energy metering device of the present invention compares synthetical error analysis platform online.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Referring to attached drawing 1, now synthetical error analysis platform is compared to electric energy metering device provided by the invention online and said
It is bright.
Electric energy metering device compares synthetical error analysis platform, including Data Analysis Platform, substation's Scheduler-Service online
Device, traditional electric energy metering device on-line monitoring system and wideband electric energy metering device on-line monitoring system.
Wideband electric energy metering device on-line monitoring system include wideband electric energy metering device, first on-line monitoring PT extension set,
First on-line monitoring CT extension set and first on-line monitoring host, the wideband electric energy metering device include wideband voltage transformer,
Wideband current transformer, the first PT terminal box, the first CT terminal box and wideband electric energy meter；The input of first on-line monitoring PT extension set
End is connected with the output end of wideband voltage transformer, and output end is connected with the input terminal of the first on-line monitoring host, and is mounted on
Inside first PT terminal box；The input terminal of first on-line monitoring CT extension set is connected with the output end of wideband current transformer, exports
It holds and is connected with the input terminal of the first on-line monitoring host, and be mounted on inside the first CT terminal box；First on-line monitoring host
Input terminal connects the output end of secondary circuit end and wideband electric energy meter, and is mounted on master control room wideband electric energy table side；The width
Frequency electric energy metering device on-line monitoring system and traditional electric energy metering device on-line monitoring system are mounted on same metering node, become
The the first on-line monitoring host of output end connection and the second on-line monitoring host of power station clock server, the first on-line monitoring host
Data Analysis Platform is connected with the output end of the second on-line monitoring host.
Traditional electric energy metering device on-line monitoring system include traditional electric energy metering device, the second on-line monitoring PT extension set,
Second on-line monitoring CT extension set and the second on-line monitoring host, the tradition electric energy metering device includes electromagnetic potential mutual inductance
Device, electromagnetic current transducer, the 2nd PT terminal box, the 2nd CT terminal box and electric energy meter；Second monitors the defeated of PT extension set on-line
Enter end to be connected with the output end of electromagnetic potential transformer, output end is connected with the input terminal of the second on-line monitoring host, and pacifies
Inside the 2nd PT terminal box；The output end phase of the input terminal and electromagnetic current transducer of second on-line monitoring CT extension set
Even, output end is connected with the input terminal of the second on-line monitoring host, and is mounted on inside the 2nd CT terminal box；Second on-line monitoring
The output end of input terminal connection the secondary circuit end and electric energy meter of host, and it is mounted on master control room electric energy table side.
Substation's clock server, built-in GPS time service device, with the first on-line monitoring host and the second on-line monitoring host
Connection transmitting clock information, makes wideband electric energy metering device on-line monitoring system and traditional electric energy metering device on-line monitoring system
The energy measurement information of acquisition is synchronous, while the first on-line monitoring host is online with the first on-line monitoring PT extension set and first respectively
It monitors and clock information is transmitted using wired or wireless synchronous communication technology between CT extension set, similarly the second on-line monitoring host difference
It is also transmitted using wired or wireless synchronous communication technology between the second on-line monitoring PT extension set and the second on-line monitoring CT extension set
Clock information.Wireless transmission method can be the modes such as low voltage power line carrier synchronous communication, radio communication, ethernet communication.
The measurement method of the secondary load of mutual inductor: on-line monitoring PT extension set and on-line monitoring CT extension set distinguish real-time online
Mutual inductor secondary load is measured, and time scale information is marked to be sent in corresponding on-line monitoring host.
The measurement method of voltage circuit secondary voltage drop: at on-line monitoring PT extension set On-line sampling system secondary circuit starting point
With the voltage value of synchronization on corresponding electric energy meter, the amplitude and phase of two paths of signals are extracted respectively, and mark time scale information,
Line monitors PT extension set and the amplitude and phase value of measurement is pooled to corresponding on-line monitoring with wire transmission or wireless transmission method
In host, while electric energy meter is pooled to the amplitude and phase value of measurement in corresponding on-line monitoring host by wired mode,
Calculate the ratio difference and angular difference of two paths of signals.
The measurement method of the error of electric energy meter: the electric energy meter of a standard built in on-line monitoring host drafts a period of time,
It monitors host on-line and measures the energy value of secondary circuit end in this period, and read the electricity of the electric energy meter in this time
It can be worth, and mark time scale information, the difference of the two.The error of electric energy meter includes active error and reactive power error.
Power quality refers to electric parameters such as real-time measurement alternating voltage, alternating current, power, frequency, phase, harmonic waves
Carry out power quality analysis.
First on-line monitoring host and the second on-line monitoring host distinguish real-time, error free or error negligibly with wired
Or the energy measurement information of the same period or synchronization of sampling or detection are pooled to data point by the mode of wireless telecommunications
Platform is analysed, it, can comprising micro computer or microprocessor and its software program since Data Analysis Platform is provided with the structure of computer
To extract the same class energy measurement information of synchronization two paths of signals, implement real-time, long-term error and power quality analysis
And comparison, and be calculated under real time on-line monitoring state, wideband electric energy metering device on-line monitoring system is relative to traditional electricity
The error of energy metering device on-line monitoring system.
According to the real-time on-line detecting method for the voltage circuit secondary voltage drop being related in the above-mentioned course of work are as follows: using public
The metrical instrument real-time online for the measurement secondary voltage drop known to the ratio difference of the section start of secondary circuit and end information of voltage and
Angular difference is measured or is detected；The same period on the end and electric energy meter of real-time online metering simultaneously or detection secondary circuit
Electric flux method are as follows: sampling and metering or detection it is tested two in the same period with its number of pulses or digital quantity mark
Quasi- electric flux.Above method is that those skilled in the art are easy to accomplish.
Voltage transformer, current transformer, PT terminal box, CT terminal box, electric energy meter and substation's clock clothes of the invention
Business device is test environment field device, and on-line monitoring PT extension set, on-line monitoring CT extension set, on-line monitoring host and data analysis are flat
Platform is all made of existing equipment, is commercially available from market.Electromagnetic transformer needs to be installed in series in wideband mutual inductor the same circuit
On, and the electric energy meter of low-pressure side, on-line monitoring host and Data Analysis Platform are placed in low voltage control room.
The present invention uses wideband mutual inductor, can absorb the electric impurity of continuous wide spectrum, be affected by the external environment small, guarantees
Measurement accuracy, while the present invention carries out real-time online inspection to electric energy meter error, PT secondary voltage drop, mutual inductor load and power quality
It surveys, and is analyzed comprehensively by Data Analysis Platform.
According to the real-time on-line detecting method for the voltage circuit secondary voltage drop being related in the above-mentioned course of work are as follows: using public
The metrical instrument real-time online for the measurement secondary voltage drop known to the ratio difference of the section start of secondary circuit and end information of voltage and
Angular difference is measured or is detected；The same period on the end and electric energy meter of real-time online metering simultaneously or detection secondary circuit
Electric flux method are as follows: sampling and metering or detection it is tested two in the same period with its number of pulses or digital quantity mark
Quasi- electric flux.Above method is that those skilled in the art are easy to accomplish.
Voltage transformer, current transformer, PT terminal box, CT terminal box, electric energy meter and substation's clock clothes of the invention
Business device is test environment field device, and on-line monitoring PT extension set, on-line monitoring CT extension set, on-line monitoring host and data analysis are flat
Platform is all made of existing equipment, is commercially available from market.Electromagnetic transformer needs to be installed in series in wideband mutual inductor the same circuit
On, and the electric energy meter of low-pressure side, on-line monitoring host and Data Analysis Platform are located in low voltage control room.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (12)
1. a kind of electric energy metering device compares synthetical error analysis platform online, which is characterized in that filled including traditional electrical energy measurement
It sets on-line monitoring system, wideband electric energy metering device on-line monitoring system, Data Analysis Platform and is filled for wideband electrical energy measurement
When setting the on-line monitoring system substation synchronous with the energy measurement information of traditional electric energy metering device on-line monitoring system acquisition
Clock server；
The tradition electric energy metering device on-line monitoring system include traditional electric energy metering device, the second on-line monitoring PT extension set,
Second on-line monitoring CT extension set and the second on-line monitoring host；
The wideband electric energy metering device on-line monitoring system include wideband electric energy metering device, first on-line monitoring PT extension set,
First on-line monitoring CT extension set and the first on-line monitoring host；
The wideband electric energy metering device includes the first PT terminal box, the first CT terminal box, is mounted on inside the first PT terminal box
Wideband voltage transformer, the wideband current transformer and wideband electric energy meter that are mounted on inside the first CT terminal box；Described first
The input terminal of on-line monitoring PT extension set is connected with the output end of wideband voltage transformer, and output end and first monitors host on-line
Input terminal is connected；The input terminal of the first on-line monitoring CT extension set is connected with the output end of wideband current transformer, output end
It is connected with the input terminal of the first on-line monitoring host；First on-line monitoring host input terminal connection secondary circuit electric energy table side and
The output end of wideband electric energy meter；
The the first on-line monitoring host of output end connection and the second on-line monitoring host of substation's clock server, described the
The output end of one on-line monitoring host and the second on-line monitoring host connects Data Analysis Platform；
The Data Analysis Platform monitors traditional electric energy metering device on-line monitoring system and wideband electric energy metering device on-line
The corresponding energy measurement information of system is analyzed and is compared in real time, obtains the error of electric energy metering device on-line monitoring system.
2. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that described
Energy measurement information include electric energy meter error, PT secondary voltage drop, Secondary Load of Voltage Transformer, current transformer secondary load and
Power quality.
3. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that described
Traditional electric energy metering device includes the 2nd PT terminal box, the 2nd CT terminal box, the electromagnetic type being mounted on inside the 2nd PT terminal box
Voltage transformer, the electromagnetic current transducer and electric energy meter being mounted on inside the 2nd CT terminal box；Second on-line monitoring
The input terminal of PT extension set is connected with the output end of electromagnetic potential transformer, the input terminal of output end and the second on-line monitoring host
It is connected；The input terminal of the second on-line monitoring CT extension set is connected with the output end of electromagnetic current transducer, output end and the
The input terminal of two on-line monitoring hosts is connected；The input terminal connection secondary circuit end of second on-line monitoring host and electric energy meter
Output end.
4. electric energy metering device according to claim 3 compares synthetical error analysis platform online, which is characterized in that described
It is same that electromagnetic potential transformer/electromagnetic current transducer is installed in series in wideband voltage transformer/wideband current transformer
On circuit.
5. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that described
Substation's clock server connect transmitting clock information with the first on-line monitoring host and the second on-line monitoring host；Described first
It monitors host on-line and uses wired or wireless biography between the first on-line monitoring PT extension set and the first on-line monitoring CT extension set respectively
Defeated mode transmits clock information；Similarly, it is described second on-line monitoring host respectively with second on-line monitoring PT extension set and second
Line monitors and also transmits clock information using wired or wireless transmission mode between CT extension set.
6. electric energy metering device according to claim 5 compares synthetical error analysis platform online, which is characterized in that described
Wired or wireless transmission mode is low voltage power line carrier synchronous communication, radio communication or ethernet communication mode.
7. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that described
Wideband electric energy metering device on-line monitoring system and traditional electric energy metering device on-line monitoring system are mounted on same metering node.
8. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that described
First on-line monitoring PT extension set, the second on-line monitoring PT extension set, the first on-line monitoring CT extension set and the second on-line monitoring CT extension set
Real-time online measuring mutual inductor secondary load respectively, and time scale information is marked to be sent in corresponding on-line monitoring host.
9. electric energy metering device according to claim 3 compares synthetical error analysis platform online, which is characterized in that described
The electricity of synchronization at first on-line monitoring PT extension set, the second on-line monitoring PT extension set On-line sampling system secondary circuit starting point
Pressure value, extracts the amplitude and phase of two paths of signals respectively, and marks time scale information, the first on-line monitoring the PT extension set, second
On-line monitoring PT extension set is pooled to the amplitude and phase value of measurement in corresponding on-line monitoring host, while wideband electric energy meter/
Electric energy meter is pooled to the amplitude and phase value of measurement in corresponding on-line monitoring host, calculates ratio difference and the angle of two paths of signals
Difference；On-line monitoring host measures the electric flux of secondary circuit end and corresponding electric energy meter in the same period, and marks markers
Information, the difference between the two are the error of electric energy meter.
10. electric energy metering device according to claim 9 compares synthetical error analysis platform online, which is characterized in that institute
The measurement method for stating secondary circuit voltage drop is as follows:
It is same at the first on-line monitoring PT extension set/second on-line monitoring PT extension set On-line sampling system secondary circuit starting point
The voltage value at moment, extracts the amplitude and phase of two paths of signals respectively, and marks time scale information, and described PT points of first on-line monitoring
Machine/second on-line monitoring PT extension set is pooled to the amplitude and phase value of measurement accordingly with wire transmission or wireless transmission method
It monitors on-line in host, while the amplitude and phase value of measurement are pooled to phase by wired mode by wideband electric energy meter/electric energy meter
In the on-line monitoring host answered, the ratio difference and angular difference of two paths of signals are calculated.
11. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that institute
It states the first on-line monitoring host and the second on-line monitoring host distinguishes real-time, error free or error negligibly with wired or wireless
The mode of communication is pooled to the same period or synchronization of sampling or detection with the energy measurement information of time scale information
Data Analysis Platform.
12. electric energy metering device according to claim 1 compares synthetical error analysis platform online, which is characterized in that institute
The same class energy measurement information that Data Analysis Platform extracts synchronization two paths of signals is stated, calculates wideband electrical energy measurement dress in real time
Set error of the on-line monitoring system relative to traditional electric energy metering device on-line monitoring system.
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| CN113472086A (en) * | 2021-06-04 | 2021-10-01 | 中国电力科学研究院有限公司武汉分院 | Method and system for acquiring power data based on electromagnetic induction type wireless transmission mutual inductor |
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| CN106405299A (en) * | 2016-10-27 | 2017-02-15 | 中国南方电网有限责任公司电网技术研究中心 | On-line monitoring and checking system for mutual inductor |
| CN206557369U (en) * | 2016-11-24 | 2017-10-13 | 中国南方电网有限责任公司超高压输电公司贵阳局 | High-voltage electric-energy meter on-line monitoring system based on carrier communication |
| CN107462864A (en) * | 2017-09-20 | 2017-12-12 | 国网湖南省电力公司 | Electric energy metering secondary overall operation situation on-Line Monitor Device and application process |
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| CN110736957A (en) * | 2019-12-12 | 2020-01-31 | 国网江西省电力有限公司电力科学研究院 | Online detection system and method for electric energy metering device based on clock synchronization |
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