CN110018437A - A kind of the Electric Energy Tariff Point Metering Device on-line monitoring method and system of branch inspection - Google Patents
A kind of the Electric Energy Tariff Point Metering Device on-line monitoring method and system of branch inspection Download PDFInfo
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- CN110018437A CN110018437A CN201910362804.9A CN201910362804A CN110018437A CN 110018437 A CN110018437 A CN 110018437A CN 201910362804 A CN201910362804 A CN 201910362804A CN 110018437 A CN110018437 A CN 110018437A
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Abstract
The present invention relates to a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection and system, on-line monitoring method includes: the monitoring data for monitoring the electric energy metering device that host branch acquires each measurement loop on-line；The monitoring data are stored in a manner of array；The monitoring data stored are calculated；Calculated result is stored in a manner of array；Monitoring data and calculated result are analyzed, if analyzed there are abnormal conditions, fault warning are carried out to abnormal conditions, and real time on-line monitoring is executed to the measurement loop of failure；If situation without exception, repeats the above steps, inspection is carried out to all measurement loops.The present invention is realized to electric energy metering device real time on-line monitoring, and monitoring point is more, and monitoring range is wide, multiple functional, and accident analysis is comprehensive, can effectively ensure that Electric Energy Tariff Point Metering Device operates normally.
Description
Technical field
The invention belongs to energy metering device on-line monitoring technique fields, and in particular to a kind of critical point electric energy of branch inspection
Metering device on-line monitoring method and a kind of Electric Energy Tariff Point Metering Device on-line monitoring system of branch inspection.
Background technique
Monitoring requirements usually require that monitoring result is more smart in the case where not influencing the normal operation of equipment on metering system
Really better, the higher the better for real-time, while also needing support more monitoring point and biggish monitoring range.But current pass
Mouth electric energy metering device mainly includes voltage transformer, current transformer, secondary circuit cable and electric energy meter, these devices all have
There is error, it may appear that all kinds of failures, traditional way to manage are regular visit and field-checking, general metering device regular visit
Main experience and equipment routing inspection period by patrol officer is formulated, and does not have the characteristic of emphasis inspection, and field-checking side
The check-verifying period of formula is not fixed, both modes found the problem have that real-time is poor, and monitoring point is few, and monitoring range is small, function
Can not be complete and troublesome in poeration the problems such as.With social development, electricity consumption user increases sharply, and existing way to manage cannot increasingly expire
Sufficient demand, so needing a kind of new metering device on-line monitoring method appearance.
Summary of the invention
The present invention is intended to provide the Electric Energy Tariff Point Metering Device on-line monitoring method and system of a kind of branch inspection, to solve
That there are real-times is poor for energy metering equipment on-line monitoring system in the prior art, and monitoring point is few, and monitoring range is small, insufficiency with
And problem troublesome in poeration.
The present invention the technical solution to solve the technical problem is that:
A kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection, comprising the following steps:
The first step, on-line monitoring host branch acquire the monitoring data of the electric energy metering device of each measurement loop；
Second step, on-line monitoring host store the monitoring data in a manner of array；
Third step, on-line monitoring host calculate the monitoring data stored；
4th step, on-line monitoring host store calculated result in a manner of array；
5th step, analyzes monitoring data and calculated result, if analyzed there are abnormal conditions, to abnormal feelings
Condition carries out fault warning, and executes real time on-line monitoring to the measurement loop of failure；If situation without exception, repeats
Step is stated, inspection is carried out to all measurement loops.
Further, in the first step, the monitoring data are to carry out at regular intervals to each measurement loop
The data of poll acquisition.
Further, the time interval of the poll acquisition may be configured as any value of 5min~60min.
Further, in the first step, the monitoring data are acquired using single thread, i.e., the same time only acquires a meter
Measure the monitoring data in circuit.
Further, the monitoring data of the acquisition include that PT secondary loop current, CT secondary loop current, the side PT are secondary
Loop voltage, the side CT secondary circuit voltage, electric energy meter voltage, electric current, frequency, phase.
Further, in the third step, the on-line monitoring host calculates the monitoring data stored, including meter
Calculate PT secondary circuit voltage drop, PT secondary circuit load, CT secondary circuit load, electric energy meter (main table) error and electric energy meter (subtabulation)
Error.
It is further, described monitoring data to be calculated and are analyzed as multiple threads in third step and the 5th step,
The monitoring data or same time that handle a plurality of measurement loop simultaneously only handle multiple monitoring data an of measurement loop.
Further, when on-line monitoring Framework computing analyzes certain, index is overproof all the way, and routine inspection mode is acquired by poll
Mode, which is switched to, carries out real time on-line monitoring to single circuit；Do not surpass when on-line monitoring Framework computing analyzes each road index
Difference, routine inspection mode do not switch.
Further, the fault warning includes super to the decompression and defluidization, electric energy meter exception, electric energy meter in monitored circuit
Difference, PT secondary circuit voltage drop transfinite, CT extension set and CT secondary circuit are operating abnormally, PT extension set and PT secondary circuit are operating abnormally
Alarm.
PT extension set is that PT secondary circuit measures and information retransmission unit, CT extension set are CT secondary circuit measuring unit.
A kind of Electric Energy Tariff Point Metering Device of branch inspection supervises system, including an on-line monitoring host and a plurality of meter online
The monitoring device in circuit is measured, the monitoring device of every measurement loop includes PT extension set, CT extension set, and PT extension set is PT secondary returning drive test
Amount and information retransmission unit, CT extension set are CT secondary circuit measuring unit, and PT extension set and CT extension set are respectively connected to PT's and CT
Secondary circuit, PT extension set and CT extension set are separately mounted in PT terminal box and CT terminal box；
On the one hand on-line monitoring host is connect with the main table of electric energy meter and electric energy meter subtabulation, for acquiring the main table of electric energy meter and electricity
The data of energy table subtabulation, on the other hand connect with the PT extension set of a plurality of measurement loop at scene；CT extension set and PT extension set share electricity
Source, and the CT secondary loop information of acquisition is transferred to by PT extension set by power supply line in a manner of carrier communication, PT extension set receives
The information that CT extension set and PT extension set acquire is transmitted to online prison by PT secondary circuit in a manner of carrier communication after to information
Survey host.
The on-line monitoring host includes measurement loop switching circuit, signal conditioning circuit, A/D conversion circuit, PLC communication
And synchronization module, electric energy meter pulse acquisition module, DSP, microprocessor, 4G and ethernet communication module；
The electric energy meter pulse acquisition module is respectively connected with the main table of electric energy meter and electric energy meter subtabulation, for acquiring electric energy meter
The energy data of main table and electric energy meter subtabulation, measurement loop switching circuit synchronization only transmit the electric energy meter of a measurement loop
To signal conditioning circuit, signal conditioning circuit is connected by A/D conversion circuit with DSP for the voltage at end, current signal, DSP and micro-
It is connected with each other between processor, DSP and microprocessor calculate the information of acquisition, and microprocessor passes through 4G and ether Netcom
News module is connect with main website server, and main website server determines whether electric energy metering device is normal by the threshold value of setting,
If electric energy metering device normal operation, microprocessor control measurement loop switching circuit according to preset time interval into
Row poll acquisition, if calculate analyze a certain measurement loop index it is overproof, routine inspection mode be switched to this measurement loop into
Row real time on-line monitoring；The PLC communication and synchronization module transmission information collection that DSP control is connected instruct and switch to measurement loop
Information collection instruction is transmitted to next PT extension set by circuit, measurement loop switching circuit, and next PT extension set leads to the information of acquisition
It crosses PT secondary circuit and is transmitted to measurement loop switching circuit, realize the switching between different measurement loops.
Further, voltage, electric current phasor after the DSP is used to digitize calculate, and the microprocessor is used for error
Calculating, task schedule, storage, control, display, external communication.
Further, the on-line monitoring host further includes man-machine interface, memory and RS485 communication module, human-machine interface
Mouth, memory and RS485 communication module are connected to the microprocessor.
Further, the man-machine interface is made of liquid crystal display and panel button.
Further, the memory is made of DDR2 memory and SD storage card, memory for store monitoring data and
Its calculated result.
Further, the on-line monitoring host further includes GPS time service and time synchronization module, and the GPS time service is timely
Between synchronization module be connected to the DSP.
The Electric Energy Tariff Point Metering Device on-line monitoring method and system of a kind of branch inspection of the invention, beneficial effect is such as
Under:
(1) on-line monitoring host can monitor a plurality of measurement loop poll one time in interval of time, prison
Measuring point is more, and monitoring range is wide.
(2) on-line monitoring host carries out inspection to each measurement loop with the time interval of 5min~60min any value,
Meet " the full-time inspection " of every measurement loop relative meaning.
(3) on-line monitoring host can calculate the decompression and defluidization, electricity for analyzing monitored circuit according to the collected data
It can table be abnormal, electric energy meter is overproof, PT secondary circuit voltage drop transfinites, CT extension set and CT secondary circuit are operating abnormally, PT extension set and PT
Secondary circuit is operating abnormally, and accident analysis is comprehensive, improves the reliability of Electric Energy Tariff Point Metering Device on-line monitoring system, it is ensured that
Electric system operates normally.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of Electric Energy Tariff Point Metering Device of branch inspection of the present invention supervises system online；
Fig. 2 is the structural schematic diagram of present invention on-line monitoring host；
Fig. 3 is the circuit connecting relation figure of the metered voltage loop switching circuit in present invention on-line monitoring host；
Fig. 4 is the circuit connecting relation figure of the metering current loop switching circuit in present invention on-line monitoring host；
Fig. 5 is a kind of flow chart of the Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection of the present invention.
Specific embodiment
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to skill of the invention
Art scheme is described in detail.Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all implements
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are acquired without making creative work
Every other embodiment, belong to the range protected of the present invention.
Referring to attached drawing, now the Electric Energy Tariff Point Metering Device on-line monitoring method to a kind of branch inspection provided by the invention and
System is illustrated.
As shown in Figure 1, a kind of Electric Energy Tariff Point Metering Device of branch inspection supervises system, including an on-line monitoring master online
The monitoring device of machine and a plurality of measurement loop, the monitoring device of every measurement loop include PT extension set, CT extension set, and PT extension set is PT
Secondary circuit measurement and information retransmission unit, CT extension set are CT secondary circuit measuring unit, and PT extension set and CT extension set are separately connected
To the secondary circuit (not shown) of PT and CT, PT extension set and CT extension set are separately mounted in PT terminal box and CT terminal box；
On the one hand on-line monitoring host is connect with the main table of electric energy meter and electric energy meter subtabulation, for acquiring the main table of electric energy meter and electricity
The data of energy table subtabulation, on the other hand connect with the PT extension set of a plurality of measurement loop at scene；CT extension set and PT extension set share electricity
Source, and the CT secondary loop information of acquisition is transferred to by PT extension set by power supply line in a manner of carrier communication, PT extension set receives
The information that CT extension set and PT extension set acquire is transmitted to online prison by PT secondary circuit in a manner of carrier communication after to information
Survey host.
As shown in Fig. 2, the on-line monitoring host includes measurement loop switching circuit, signal conditioning circuit, A/D conversion electricity
Road, PLC communication and synchronization module, electric energy meter pulse acquisition module, DSP, microprocessor, 4G and ethernet communication module；
The electric energy meter pulse acquisition module is respectively connected with the main table of electric energy meter and electric energy meter subtabulation, for acquiring electric energy meter
The energy data of main table and electric energy meter subtabulation, measurement loop switching circuit synchronization only transmit the electric energy meter of a measurement loop
To signal conditioning circuit, signal conditioning circuit is connected by A/D conversion circuit with DSP for the voltage at end, current signal, DSP and micro-
It is connected with each other between processor, DSP and microprocessor calculate the information of acquisition, and microprocessor passes through 4G and ether Netcom
News module is connect with main website server, and main website server determines whether electric energy metering device is normal by the threshold value of setting,
If electric energy metering device normal operation, microprocessor control measurement loop switching circuit according to preset time interval into
Row poll acquisition, if calculate analyze a certain measurement loop index it is overproof, routine inspection mode be switched to this measurement loop into
Row real time on-line monitoring；The PLC communication and synchronization module transmission information collection that DSP control is connected instruct and switch to measurement loop
Information collection instruction is transmitted to next PT extension set by circuit, measurement loop switching circuit, and next PT extension set leads to the information of acquisition
It crosses PT secondary circuit and is transmitted to measurement loop switching circuit, realize the switching between different measurement loops.
Voltage, electric current phasor of the DSP for after digitizing calculate, and the microprocessor is used for error calculation, task
Scheduling, storage, control, display, external communication.
The on-line monitoring host further includes man-machine interface, memory and RS485 communication module, man-machine interface, memory
The microprocessor is connected to RS485 communication module.
The man-machine interface is made of liquid crystal display and panel button.
The memory is made of DDR2 memory and SD storage card, and memory is for storing monitoring data and its calculating knot
Fruit.
The on-line monitoring host further includes GPS time service and time synchronization module, the GPS time service and time synchronization module
It is connected to the DSP.
Signal conditioning circuit selects the signal conditioning module of model AD620, and A/D conversion circuit selects model AD7760
Analog-digital converter.
Host is monitored on-line using DSP and microprocessor as core, there is powerful digital processing capabilities, DSP digital signal
Processor selects forth generation SHARC the processor ADSP-21483, the DSP of ADI company to be based on a single-instruction multiple-data
(SIMD) kernel is made, and supports 32 fixed points and 32/40 floating-point arithmetic, supports 400MHz core clock speed, and built-in
FIR (finite impulse response filter), IIR (infinite impulse response filter) and FFT (Fast Fourier Transform (FFT)) accelerator
Etc. additional processing module, the overall performance of system can be substantially improved.Energy is calculated using the fast floating point number of ADSP-21483
Power calculates the parameters such as three-phase voltage, electric current, frequency, phase, power in real time, guarantees that the electric parameter accuracy of real-time measurement reaches
0.05 grade.
Microprocessor selects the STM32F429 of ST Microelectronics, is a 32 8-digit microcontrollers based on ARM,
Flash capacity 1024Kbytes, supports 168MHz core clock speed, and program memory capacity 1MB has peripheral hardware abundant and connects
Mouthful.
Under normal circumstances, the CT extension set of a plurality of measurement loop to the side the CT secondary circuit voltage of acquisition, current information and
CT secondary circuit load is respectively stored in CT extension set, and is transmitted to PT extension set by power supply line by way of carrier communication
In.PT side secondary circuit voltage, current information and PT secondary circuit load point of the PT extension set of a plurality of measurement loop to acquisition
It is not stored in PT extension set.On-line monitoring host is polled acquisition according to preset time interval, acquires wherein a certain
When the running state data of measurement loop, microprocessor gives measurement loop switching circuit one control instruction, measures to this
The data in circuit are acquired, and the monitoring data that the PT extension set in the circuit is stored are passed by the PT secondary circuit voltage line at scene
On-line monitoring host is transported to, monitors host on-line according to the main table of electric energy meter of acquisition and voltage, electric current, the frequency of electric energy meter subtabulation
The information such as rate, phase, calculate monitoring data, obtain electric energy metering device secondary circuit global error, the main table of electric energy meter
The information such as error and electric energy meter subtabulation error, metered voltage secondary circuit voltage drop, and passed by 4G and ethernet communication module
Main website server is transported to, main website server determines whether metering device is normal by the threshold value of setting, if device operation is just
Often, then microprocessor controls measurement loop switching circuit and is polled acquisition according to preset time interval, divides if calculating
Certain is precipitated, and index is overproof all the way, and routine inspection mode, which is switched to, carries out real time on-line monitoring to this primary Ioops.
The working principle of measurement loop switching circuit is as shown in Figure 3, Figure 4, and Fig. 3 is the meter in present invention on-line monitoring host
The circuit connecting relation figure of voltage circuit switching circuit is measured, Fig. 4 is that the metering current circuit in present invention on-line monitoring host is cut
Change the circuit connecting relation figure of circuit.PC1, PC2, PC3, PC4 are control signal of the microprocessor to measurement loop switching circuit,
Relay uses G6A-474P-ST-US, is 4 dpdt double-pole double-throw (DPDT) type relays, and triode Q1 to Q4 drives corresponding relay work,
When there is control signal PC1 on measurement loop 1, triode Q1 saturation, the coil 1 and 2 of relay LS1 has comparable voltage stream
It crosses, then relay is attracted, and the three-phase voltage on measurement loop 1 is transmitted to on-line monitoring host, the control of measurement loop 2,3,4 at this time
When signal PC2, PC3, PC4 processed are 0V, triode cut-off, relay coil no current flows through, then relay discharges, and does not acquire meter
Measure the data in circuit 2,3,4.
Host is monitored on-line according to the specific practice that preset time interval is polled acquisition is: on-line monitoring master
Machine is at set time intervals acquired the monitoring data of each measurement loop, and data acquisition is single thread, acquires simultaneously
The monitoring data of one measurement loop.Technical staff is configured the time interval of acquisition according to the needs at scene, between specific
It may be configured as any value of 5min~60min every the time, for example, taking time interval is A (5min≤A≤60min) minute, together
When inspections are carried out to 4 measurement loops, the data of the 1st article of measurement loop are acquired at moment local time T,Moment acquisition
The data of 2nd article of measurement loop, and so on,Moment acquires the data of the 3rd article of measurement loop,When
Carve the data of the 4th article of measurement loop of acquisition.One on-line monitoring host can be interior to a plurality of measurement loop poll over any time period
Monitoring one time, monitoring point is more, and monitoring range is wide, and is all satisfied real-time online prison over any time period for each measurement loop
It surveys, realizes every measurement loop opposite " full-time inspection ".
As shown in figure 5, a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection, comprising the following steps: the
One step, on-line monitoring host branch acquire the monitoring data of the electric energy metering device of each measurement loop；Second step, on-line monitoring
Host stores the monitoring data in a manner of array；Third step monitors host on-line to the monitoring data stored
It is calculated；4th step, on-line monitoring host store calculated result in a manner of array；5th step, to monitoring data
It is analyzed with calculated result, if analyzed there are abnormal conditions, fault warning is carried out to abnormal conditions, and to appearance event
The measurement loop of barrier executes real time on-line monitoring；If situation without exception, repeats the above steps, all measurement loops are carried out
Inspection.
The specific practice that on-line monitoring host stores monitoring data in a manner of array is: on-line monitoring host is adopted
Collect PT secondary circuit load, the voltage of PT extension set, CT secondary circuit load, electric energy meter working voltage, electric current, frequency, phase etc.
Parameter is stored in the memory of on-line monitoring host the data of acquisition in a manner of array respectively.Monitor host pair on-line
Acquisition data are calculated, and are executed by DSP and microprocessor, including PT secondary circuit voltage drop and secondary circuit electric energy meter (main table)
Error, electric energy meter (subtabulation) error, calculated result are stored in the memory of on-line monitoring host respectively in a manner of array.
PT extension set does high precision collecting to the three-phase voltage of voltage transformer, and gives data back to on-line monitoring host,
The voltage of corresponding electric energy table side collection point can also be done precise measurement by on-line monitoring host, monitor host on-line to certain of acquisition
The voltage at primary Ioops both ends compares, and calculates the percentage that the loop pressure drop accounts for signal.Monitor the GPS built in host on-line
Time service and time synchronization module (time service precision 1uS) generate phase measurement enabling signal, realize PT extension set and on-line monitoring host
Phase synchro measure, the phase error of PT secondary circuit voltage drop is calculated, to realize to the PT secondary returning of secondary circuit
The real time on-line monitoring of road pressure drop.
CT extension set measures the electric current of the side secondary circuit CT and the voltage signal in this circuit, is calculated two according to acquisition data
The CT secondary load of minor loop, CT secondary load are transferred to the PT extension set of same measurement loop by way of carrier communication；
PT extension set measures the voltage of the side secondary circuit PT and the current signal in this circuit, and secondary circuit is calculated according to acquisition data
PT secondary load, the CT secondary load and PT secondary load data of calculating are by the voltage transformer secondary pressure-wire at scene to carry
The mode of wave communication is transferred to on-line monitoring host, to realize the reality of the PT secondary load to secondary circuit, CT secondary load
When monitor on-line.
On-line monitoring host acquire respectively the voltage of the main table of electric energy meter and electric energy meter subtabulation, electric current, phase, power (it is active,
It is idle), it is compared with electrical energy meter electricity energy impulse data, calculates the error of electric energy meter main table and electric energy meter subtabulation.
The analysis of on-line monitoring host includes the analysis to the analysis of acquisition data and to acquisition data calculated result.Wherein
Can analyze out according to the collected data monitored circuit whether decompression or defluidization, electric energy meter whether abnormal, CT extension set whether
Whether whether abnormal, PT extension set abnormal for abnormal, CT secondary circuit operation, whether the operation of PT secondary circuit is abnormal.It is tied according to calculating
Fruit can analyze out whether electric energy meter is overproof, whether PT secondary circuit voltage drop transfinites, whether PT load overloads and whether is CT load
Overload.Accident analysis is comprehensive, improves the reliability of Electric Energy Tariff Point Metering Device on-line monitoring system, it is ensured that electric system is normal
Operation.
Monitoring host on-line is multiple threads to the calculating analysis of monitoring data, can handle 4 measurement loops simultaneously
Monitoring data, or simultaneously handle a measurement loop multiple monitoring data.When on-line monitoring Framework computing analyze it is a certain
Road index is overproof, and routine inspection mode, which is switched to, carries out real time on-line monitoring to single circuit；When on-line monitoring Framework computing analyzes
Each road index is not overproof, and routine inspection mode does not switch.The knowledge grasped according to those skilled in the art, it is contemplated that go out simultaneously
The abnormal conditions in existing 2 or more circuits hardly occur, therefore such case does not consider.
On-line monitoring host carries out on-line checking to Electric Energy Tariff Point Metering Device and status assessment is for abnormal conditions
Mobile phone of the system by GPRS communication modes to related personnel issues warning information, and product operation is simple, multiple functional, time saving province
Power greatly improves O&M efficiency.
Applicant combines Figure of description to be described in detail and describe the embodiment of the present invention, but this field skill
Art personnel are it should be understood that above embodiments are only the preferred embodiments of the invention, and explanation is intended merely to help reader in detail
More fully understand spirit of that invention, and it is not intended to limit the protection scope of the present invention, on the contrary, any based on invention essence of the invention
Any improvement or modification made by mind should all be fallen within the scope and spirit of the invention.
Claims (16)
1. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection, the on-line monitoring method include following step
It is rapid:
The first step, on-line monitoring host branch acquire the monitoring data of the electric energy metering device of each measurement loop；
Second step, on-line monitoring host store the monitoring data in a manner of array；
It is characterized by:
The on-line monitoring method further comprises the steps of:
Third step, on-line monitoring host calculate the monitoring data stored；
4th step, on-line monitoring host store calculated result in a manner of array；
5th step, analyzes monitoring data and calculated result, if analyzed there are abnormal conditions, to abnormal conditions into
Row fault warning, and real time on-line monitoring is executed to the measurement loop of failure；If situation without exception repeats above-mentioned step
Suddenly, inspection is carried out to all measurement loops.
2. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 1, feature exist
In:
In the first step, the monitoring data are to be polled acquisition to each measurement loop at regular intervals
Data.
3. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 2, feature exist
In:
The time interval of the poll acquisition is set as any value of 5min~60min.
4. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 2, feature exist
In:
In the first step, the monitoring data are acquired using single thread, i.e., the same time only acquires a measurement loop
Monitoring data.
5. a kind of Electric Energy Tariff Point Metering Device on-line monitoring side of branch inspection described in any one of -4 according to claim 1
Method, it is characterised in that:
The monitoring data of the acquisition include PT secondary loop current, CT secondary loop current, the side PT secondary circuit voltage, the side CT
Secondary circuit voltage, electric energy meter voltage, electric current, frequency, phase.
6. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 1, feature exist
In:
In the third step, the on-line monitoring host calculates the monitoring data stored, including calculates PT bis- times
Loop pressure drop, PT secondary circuit load, CT secondary circuit load, the main Watch Error of electric energy meter and electric energy meter subtabulation error.
7. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 1, feature exist
In:
It is described monitoring data to be calculated and are analyzed as multiple threads in the third step and the 5th step, it handles simultaneously
The monitoring data of a plurality of measurement loop or same time only handle multiple monitoring data an of measurement loop.
8. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection, feature according to claim 2 or 7
It is:
When the index that on-line monitoring Framework computing analyzes a certain measurement loop is overproof, routine inspection mode is cut by the mode that poll acquires
It is changed to and real time on-line monitoring is carried out to single circuit；When not overproof, the inspection that analyzes each road index of on-line monitoring Framework computing
Mode does not switch.
9. a kind of Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection according to claim 1, feature exist
In:
The fault warning includes, PT secondary circuit overproof to the decompression and defluidization, electric energy meter exception, electric energy meter in monitored circuit
The alarm that pressure drop is transfinited, CT extension set and CT secondary circuit are operating abnormally, PT extension set and PT secondary circuit are operating abnormally, wherein PT points
Machine is that PT secondary circuit measures and information retransmission unit, CT extension set are CT secondary circuit measuring unit.
10. using a kind of critical point of the Electric Energy Tariff Point Metering Device on-line monitoring method of branch inspection described in claim 1-9
Electric energy metering device on-line monitoring system, the on-line monitoring system include an on-line monitoring host and a plurality of measurement loop
Monitoring device, the monitoring device of every measurement loop include PT extension set, CT extension set, and PT extension set is the measurement of PT secondary circuit and information
Retransmission unit, CT extension set are CT secondary circuit measuring unit, and PT extension set and CT extension set are respectively connected to the secondary circuit of PT and CT,
PT extension set and CT extension set are separately mounted in PT terminal box and CT terminal box；It is characterized by:
On the one hand on-line monitoring host is connect with the main table of electric energy meter and electric energy meter subtabulation, for acquiring the main table of electric energy meter and electric energy meter
On the other hand the data of subtabulation are connect with the PT extension set of a plurality of measurement loop at scene；CT extension set and PT extension set share power supply, and
The CT secondary loop information of acquisition is transferred to by PT extension set by power supply line in a manner of carrier communication, PT extension set receives information
The information that CT extension set and PT extension set acquire is transmitted to on-line monitoring host by PT secondary circuit in a manner of carrier communication afterwards.
11. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 10, it is characterised in that:
The on-line monitoring host includes measurement loop switching circuit, signal conditioning circuit, A/D conversion circuit, PLC communication and same
Walk module, electric energy meter pulse acquisition module, DSP, microprocessor, 4G and ethernet communication module；
The electric energy meter pulse acquisition module is respectively connected with the main table of electric energy meter and electric energy meter subtabulation, for acquiring the main table of electric energy meter
With the energy data of electric energy meter subtabulation, measurement loop switching circuit synchronization only transmits the electric power meter end of a measurement loop
Voltage, current signal are to signal conditioning circuit, and signal conditioning circuit is connected by A/D conversion circuit with DSP, DSP and micro process
It is connected with each other between device, DSP and microprocessor calculate the information of acquisition, and microprocessor passes through 4G and ethernet communication mould
Block is connect with main website server, and main website server determines whether electric energy metering device is normal by the threshold value of setting, if electric
Energy metering device normal operation, then microprocessor control measurement loop switching circuit is taken turns according to preset time interval
Acquisition is ask, if the index that calculating analyzes a certain measurement loop is overproof, routine inspection mode, which is switched to, carries out in fact this measurement loop
When monitor on-line；The PLC communication and synchronization module transmission information collection that DSP control is connected instruct and switch electricity to measurement loop
Information collection instruction is transmitted to next PT extension set by road, measurement loop switching circuit, and next PT extension set passes through the information of acquisition
PT secondary circuit is transmitted to measurement loop switching circuit, realizes the switching between different measurement loops.
12. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 11, it is characterised in that: the DSP is used
Voltage, electric current phasor after digitlization calculate, and the microprocessor is used for error calculation, task schedule, storage, control, shows
Show, external communication.
13. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 11, it is characterised in that: the online prison
Surveying host further includes man-machine interface, memory and RS485 communication module, and man-machine interface, memory and RS485 communication module connect
It is connected to the microprocessor.
14. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 13, it is characterised in that: the human-machine interface
Mouth is made of liquid crystal display and panel button.
15. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 13, it is characterised in that: the memory
It is made of DDR2 memory and SD storage card, memory is for storing monitoring data and its calculated result.
16. Electric Energy Tariff Point Metering Device on-line monitoring system according to claim 11, it is characterised in that: the online prison
Surveying host further includes GPS time service and time synchronization module, and the GPS time service and time synchronization module are connected to the DSP.
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