CN207232382U - Electric energy metering secondary overall operation situation on-Line Monitor Device - Google Patents
Electric energy metering secondary overall operation situation on-Line Monitor Device Download PDFInfo
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Abstract
The utility model discloses a kind of electric energy metering secondary overall operation situation on-Line Monitor Device, including main website side unit and terminal unit, main website side unit includes main website computer and metering device on-line monitoring equipment, terminal unit includes electric energy metering secondary, PT voltage acquisition modules, CT current acquisition modules, table voltage acquisition module and table current acquisition module, electric energy metering secondary includes voltage transformer pt, Current Transmit, electric energy meter and electric energy acquisition terminal, and electric energy acquisition terminal is connected with metering device on-line monitoring equipment.The utility model can save a large amount of manpower and materials costs, security risk caused by live live detection, while the secondary overall operation situation of monitoring and metering device in real time be reduced, to finding there is remarkable effect phenomena such as measurement loop and device exception and stealing in time.
Description
Technical field
It the utility model is related to electrical energy measurement field, and in particular to a kind of electric energy metering secondary overall operation situation exists
Line monitoring device, can supervise the operating condition of the electric energy metering device of the responsible consumer such as substation and big industrial customer online
Survey.
Background technology
In recent years, with the propulsion of the power system reforms such as factory's net separation, power plant closes electric energy metering device closely
Note, particularly National Development and Reform Committee, National Energy Board in 2015 formally announces《State Council of the Central Committee of the Communist Party of China is on further in-depth electric power
Some opinions of system reform》Afterwards, " electricity " is more and more obvious as the market life circle of commodity, and electricity is as measurement electricity consumption/power generation
Quantity directly concern the economic interests of power plant and big power consumer.The electric energy metering device device how many as metering electricity,
Nowadays also increasingly paid attention to be subject to power plant, power grid enterprises and power customer.For power grid enterprises, electricity transaction is enterprise
Where the economic lifeline of industry development, and metering points of electric energy quantity is more, and geographical distribution is wide, it is difficult to carry out efficient field management,
The technology of economical rationality is taken to be monitored regional electric energy metering device, it is ensured that electrical energy measurement failure or stealing occur
It can be found in time during phenomenon, tool is of great significance.
Power industry regulatory requirements, should all be in specific round of visits, to electric energy for all kinds of electric energy metering devices
The equipment such as table, metered voltage secondary circuit voltage drop and circuit carry out live periodic inspection.On the one hand, since electrical energy measurement is counted
Measure numerous, geographical distribution is wide, and it is by only carrying out that electric energy meter field, which is examined, and metered voltage secondary circuit voltage drop is also to press group
Carry out, workflow is cumbersome, complicated, need to expend a large amount of manpower and materials and time；On the other hand, this kind of field test project all must
Must be operated in the case of powered, during field test repeatedly, frequently operation be easy to cause the wire connection terminal production to equipment
Raw damage, be easy to cause measurement loop open circuit, possesses certain security risk, careless slightly to bring larger safety hidden to system
Suffer from.
Utility model content
The technical problems to be solved in the utility model：For the above problem of the prior art, there is provided one kind can save largely
Manpower and materials cost, reduces security risk caused by live live detection, while the secondary overall fortune of monitoring and metering device in real time
Market condition, to finding electric energy metering secondary of phenomena such as measurement loop and device exception and stealing with remarkable effect in time
Overall operation situation on-Line Monitor Device.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of electric energy metering secondary overall operation situation on-Line Monitor Device, including main website side unit and at least one
Terminal unit, the main website side unit include main website computer and the metering device on-line monitoring equipment being connected with each other, the terminal
Unit includes electric energy metering secondary, PT voltage acquisition modules, CT current acquisition modules, table voltage acquisition module and table electric current
Acquisition module, the electric energy metering secondary include voltage transformer pt, Current Transmit, electric energy meter and generated energy acquisition
Terminal, the voltage transformer pt, Current Transmit, electric energy acquisition terminal are connected with electric energy meter respectively, the PT voltages
Acquisition module is connected with the output terminal of voltage transformer pt, the CT current acquisition modules and the output terminal phase of Current Transmit
Even, the table voltage acquisition module, table current acquisition module are connected with the table wire connection terminal of electric energy meter respectively, and the PT voltages are adopted
Collect module, CT current acquisition modules, table voltage acquisition module and table current acquisition module output terminal respectively with generated energy acquisition
Terminal is connected, and the electric energy acquisition terminal is connected by network with metering device on-line monitoring equipment.
Preferably, the electric energy acquisition terminal is connected by GPRS network with metering device on-line monitoring equipment.
Preferably, the metering device on-line monitoring equipment includes signal processing interface module, multichannel A/D moduluss of conversion
Block, active pulse collection module, counter, dsp processor, microprocessor and communication module, the signal processing interface module,
Active pulse collection module is connected with electric energy acquisition terminal respectively, and the signal processing interface module is turned by multichannel A/D
Mold changing block is connected with dsp processor, and the active pulse collection module is connected by counter with dsp processor, at the DSP
Reason device, be connected with each other between microprocessor, and the microprocessor is connected by communication module with main website computer.
Preferably, the communication module is RS485 serial communication modulars.
Preferably, liquid crystal display mode, key-press module and history data repository are also associated with the microprocessor.
The utility model electric energy metering secondary overall operation situation on-Line Monitor Device tool has the advantage that：
1st, the utility model includes main website side unit and at least one terminal unit, and main website side unit includes what is be connected with each other
Main website computer and metering device on-line monitoring equipment, main website is placed in by the metering device on-line monitoring equipment with standard table function
Side, realizes the structure of standard scale postposition, and whole electric energy metering secondary overall operation situation on-line monitoring system need to only match somebody with somebody
Put a standard electric energy meter (metering device on-line monitoring equipment), you can meet regulatory requirements, while ensure standard electric energy meter
Output data is accurately and reliably.Control is sent when to needing to carry out the tested electric energy meter of error-detecting by main website side unit to refer to
Order, then after corresponding electric energy acquisition terminal receives instruction, the voltage of tested electric energy meter, current signal and active pulse are passed through
Wireless public network is transmitted to metering device on-line monitoring equipment, and the error of checklist is calculated by metering device on-line monitoring equipment.
2nd, existing electric energy metering device secondary circuit and its on-Line Monitor Device, need to be in each substation and with per family
One standard electric energy meter is installed, on the one hand significantly increases project investment, on the other hand, is installed on the standard electric energy meter at scene
Need every three months to carry out a laboratory verification according to regulatory requirements, do not possess real dissemination.The utility model is for existing
Electric energy metering device secondary circuit and its on-Line Monitor Device, monitor generated energy acquisition function and metering device on-line function
Separation, generated energy acquisition function is realized by existing electric energy metering secondary, on the basis of existing electric energy metering secondary
Upper increase PT voltage acquisition modules, CT current acquisition modules, table voltage acquisition module and table current acquisition module, then utilize master
The metering device on-line monitoring equipment of side unit of standing receives the electric energy data that transmits of electric energy acquisition terminal, can be very big
Ground reduces equipment cost, and has very positive dissemination, is particularly suitable for the weight such as substation and big industrial customer
The operating condition of the electric energy metering device of user is wanted to be monitored on-line.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment device.
Fig. 2 is the structure diagram of the utility model embodiment metering device on-line monitoring equipment.
Marginal data：1st, main website side unit；11st, main website computer；12nd, metering device on-line monitoring equipment；121st, at signal
Manage interface module；122nd, multichannel A/D modular converters；123rd, active pulse collection module；124th, counter；125th, DSP processing
Device；126th, microprocessor；127th, communication module；2nd, terminal unit；21st, electric energy metering secondary；211st, electric energy meter；212nd, it is electric
Energy acquisition terminal；22nd, PT voltage acquisition modules；23rd, CT current acquisition modules；24th, table voltage acquisition module；25th, table electric current
Acquisition module.
Embodiment
As shown in Figure 1, the electric energy metering secondary overall operation situation on-Line Monitor Device of the present embodiment includes main website
Side unit 1 and at least one terminal unit 2, main website side unit 1 includes the main website computer 11 being connected with each other and metering device is online
Monitoring device 12, terminal unit 2 include electric energy metering secondary 21, PT voltage acquisition modules 22, CT current acquisition modules 23,
Table voltage acquisition module 24 and table current acquisition module 25, it is mutual that electric energy metering secondary 21 includes voltage transformer pt, electric current
Sensor CT, electric energy meter 211 and electric energy acquisition terminal 212, voltage transformer pt, Current Transmit, electric energy acquisition terminal
212 are connected with electric energy meter 211 respectively, and PT voltage acquisition modules 22 are connected with the output terminal of voltage transformer pt, CT current acquisitions
Module 23 is connected with the output terminal of Current Transmit, table voltage acquisition module 24, table current acquisition module 25 respectively with electric energy
The table wire connection terminal of table 211 is connected, PT voltage acquisition modules 22, CT current acquisition modules 23, table voltage acquisition module 24 and table
The output terminal of current acquisition module 25 is connected with electric energy acquisition terminal 212 respectively, and electric energy acquisition terminal 212 passes through network
It is connected with metering device on-line monitoring equipment 12.Electric energy metering secondary 21 be existing electric energy meter metering circuit, this implementation
In example on the basis of electric energy metering secondary 21, in the PT terminal boxs installation PT voltage acquisition modules 22 of voltage transformer pt
To gather this side measure winding secondary voltage of three-phase PT, CT current acquisition modules are installed in the CT terminal boxs of Current Transmit
23 to gather this side measure winding secondary current of three-phase CT, in 24 He of screen cabinet installation table voltage acquisition module of electric energy meter 211
Table current acquisition module 25, for gathering electric power meter end three-phase voltage and electric power meter end three-phase voltage, the voltage/current collected
Data are by RS485 port transmissions to electric energy acquisition terminal 212, while the active pulse signal of electric energy meter 211 then passes through electricity
Amount pulse output interface, which is exported to electric energy acquisition terminal 212, voltage, the electric current of 211 Internal Gauge of electric energy meter, passes through electric energy meter
On RS485 interfaces be transmitted to electric energy acquisition terminal 212.Electric energy acquisition terminal 212 passes through the electric parameter data of reception
Network transmission to main website side unit 1 metering device on-line monitoring equipment 12, metering device on-line monitoring equipment 12 to data into
Row processing, obtains electric energy metering secondary overall operation situation and exports to main website computer 11.
In the present embodiment, electric energy acquisition terminal 212 is connected by GPRS network with metering device on-line monitoring equipment 12,
GPRS network has the advantages that wide coverage, equipment cost are low, disclosure satisfy that the electric energy metering secondary of the present embodiment is whole
The data volume and data rate requirement of running body situation on-line monitoring.
As shown in Fig. 2, metering device on-line monitoring equipment 12 includes signal processing interface module 121, multichannel A/D is changed
Module 122, active pulse collection module 123, counter 124, dsp processor 125, microprocessor 126 and communication module 127,
Signal processing interface module 121, active pulse collection module 123 are connected with electric energy acquisition terminal 212 respectively, and signal processing connects
Mouth mold block 121 is connected by multichannel A/D modular converters 122 with dsp processor 125, and active pulse collection module 123 passes through meter
Number device 124 is connected with dsp processor 125, is connected with each other between dsp processor 125, microprocessor 126, and microprocessor 126
It is connected by communication module 127 with main website computer 11.Metering device on-line monitoring equipment 12 is with arm processor+DSP data processings
Unit is core, has a powerful digital processing capabilities, metering device on-line monitoring equipment 12 receive from voltage acquisition equipment,
The voltage U and electric current I of current acquisition equipment output, and the active pulse of electric energy meter output, turn through Signal-regulated kinase and A/D
DSP operation is sent into after parallel operation, electric energy metering device secondary circuit global error, electric energy meter kinematic error, metered voltage can be obtained
Secondary circuit voltage drops.
In the present embodiment, signal processing interface module 121 specifically uses GPRS wireless communication modules, and dsp processor 125 has
Body uses the dsp chip of model tms320f28335, and microprocessor 126 specifically uses ARM946E-STMProcessor.This implementation
In example, communication module 127 is RS485 serial communication modulars.As shown in Fig. 2, it is also associated with liquid crystal display mode on microprocessor 126
The peripheral circuits such as formula, key-press module, history data repository, JTAG emulation interface (being omitted in figure), composition one are complete micro-
Machine processing system.In the present embodiment, history data repository specifically uses massive store SD card.
Metering device on-line monitoring equipment 12 is used as DC power supply using the conversion of linear power frequency, and electrically mutual with two
The DC conversion power of isolation, wherein+5V (maximum output 3A) is used as supplying digital circuits, ± 12V (maximum output 0.2A) makees
Power for analog circuit.DC conversion power be used for by the 220V power supplys (L, N) of input be converted to+5V, positive and negative 12V to signal at
Manage interface module 121, multichannel A/D modular converters 122, active pulse collection module 123, counter 124, dsp processor
125th, microprocessor 126, and power to RS485 serial communication modulars.The main performance of metering device on-line monitoring equipment 12
Parameter is：Input analog voltage 42~120V of scope, error≤0.2%；Input analog current 0~6A of scope, error≤
0.2%, working power (180~260) V, 50Hz.
The standard electric energy meter examined for electric energy meter reality load error, according to power industry regulatory requirements, needs every three months
Carry out a laboratory verification.Current existing correlation theory has development that standard electric energy meter is placed in scene, and to carry out metering device remote
The method introduction of journey monitoring, such method need to be mounted on a standard electric energy meter, this method in each substation and user
Be limited in that be difficult to be installed on scene standard electric energy meter every three months carry out a laboratory verification, can not ensure mark
Quasi- electric energy meter is accurately and reliably.The present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device uses standard scale
Postposition method, system main website side is installed on as main website side unit using the metering device on-line monitoring equipment 12 with standard table function
1 component, whole secondary circuit overall operation situation on-line monitoring system need to only configure a metering device on-line monitoring equipment
12, metering device on-line monitoring equipment 12 has the function of standard electric energy meter, in practical application, metering device on-line monitoring is set
Standby standard electric energy meter function module every three months carries out a laboratory verification, can meet regulatory requirements, while ensure standard
Electric energy meter output data is accurately and reliably.The present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device can be right
Metering secondary global error is monitored on-line, can monitoring and metering circuit operation it is whether normal, for electric current secondary loop
The abnormal conditions such as two points ground fault or voltage secondary circuit pressure drop are excessive, can find in time, reduce electricity mistake.Meanwhile for meter
The excessive phenomenon of secondary circuit global error is measured, exceptional instructions can be sent in time and inform power grid and user, guarantee supplies electricity consumption both sides
Economic interests.The present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device can be in some province or area
A wide range of installation, monitors the electric energy metering device operating status and error of substation in area or large user on-line.Tool
Body embodiment is：Electric energy acquisition terminal stores the voltage of collection, electric current and active pulse data, and monitoring main website needs
When gathering the metering device running state data of wherein some stoichiometric point, data test introduction is sent by main website, via metering
Device on-line monitoring equipment carries out data to the corresponding electric energy acquisition terminal of the stoichiometric point and calls survey together, and electric energy acquisition terminal should
Voltage, electric current and the active burst data transfers of stoichiometric point are to metering device on-line monitoring equipment, and on-line monitoring equipment is to data
Handled to obtain the information such as error and secondary voltage drop and be transmitted to main website, main station system judges metering by preset threshold value
Whether device operation is normal, and sends corresponding condition indicative signal and inform administrative staff.
The present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device can be realized to electric energy metering device
Secondary circuit electric information carries out long-range monitoring function, obtains metering device and secondary circuit real time execution situation, can be to area
The electric energy metering device of interior all substations and large user realize electric energy metering device secondary circuit global error, electric energy meter operation
The on-line monitoring of the parameter such as error, metered voltage secondary circuit voltage drop, and then to the real-time running state of electric energy metering device
Remotely monitor and judge.The application process of the present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device
Implementation steps include：
1) the main website computer 11 of main website side unit 1 passes through metering device on-line monitoring equipment 12 and each terminal unit 2
Electric energy acquisition terminal 212 to gather this side of the voltage transformer of voltage transformer pt in each terminal unit 2 respectively secondary
Voltage uben, the current transformer of Current Transmit this side secondary current iben, electric energy meter 211 table side secondary voltage
ubiao, electric energy meter 211 table side secondary current ibiaoAnd the active pulse that the unit interval T inside counting device of electric energy meter 211 obtains
Quantity N；
2) it is based on this side of voltage transformer secondary voltage uben, this side of current transformer secondary current iben, table side two
Secondary voltage ubiao, table side secondary current ibiaoAnd the active number of pulses N that unit interval T inside counting device obtains carries out electric energy meter
Amount monitoring data are calculated and exported；The electrical energy measurement monitoring data include this side active-power P of mutual inductorben, electric energy table side
Active-power Pbiao, electric energy meter active-power P itself0, secondary circuit overall operation error η1, electric energy meter kinematic error η2, voltage
At least one of transformer secondary circuit voltage drop e.
In the present embodiment, this side active-power P of mutual inductor in step 2)benCalculating function expression such as formula (1) institute
Show, electric energy table side active-power PbiaoCalculating function expression such as formula (2) shown in, electric energy meter active-power P itself0Calculating
Shown in function expression such as formula (3)；
In formula (1)~formula (3), uben(i) it is this side of voltage transformer secondary voltage ubenSampling window M in i-th
A voltage sample value, iben(i) it is this side of current transformer secondary current ibenSampling window M in i-th of current sample
Value, M are sampling window size, and N is the active number of pulses that unit time T inside countings device obtains, and C is normal for the active pulse of electric energy meter
Number.
In the present embodiment, secondary circuit overall operation error η in step 2)1Calculating function expression such as formula (4) shown in,
Electric energy meter kinematic error η2Calculating function expression such as formula (5) shown in；
In formula (4) and formula (5), PbenFor this side active power of mutual inductor, PbiaoFor electric energy table side active power, P0For electricity
Can table active power itself.
In the present embodiment, calculating function expression such as formula (6) institute of Voltage Transformer Secondary Circuit Voltage Drop e in step 2)
Show；
In formula (6), ubenFor this side secondary voltage of voltage transformer, ubiaoFor table side secondary voltage, δ is secondary circuit
Voltage drop angular difference component,The power-factor angle of load is measured for electric energy meter.
In the present embodiment, shown in the calculating function expression such as formula (7) of secondary circuit voltage drop angular difference component δ, electric energy meter
Measure the power-factor angle of loadCalculating function expression such as formula (8) shown in；
The π Δs t (7) of δ=2
In formula (7) and formula (8), Δ t is this side of voltage transformer secondary voltage uben, table side secondary voltage ubiaoBetween
Adjacent zero crossing time difference, Δ t1 are table side secondary voltage ubiao, table side secondary current ibiaoBetween the adjacent zero crossing time difference.
In addition, the application process of the present embodiment electric energy metering secondary overall operation situation on-Line Monitor Device can also root
According to the voltage difference and phase difference for needing to calculate metered voltage secondary circuit head and the tail both ends, when error exceeds regulatory requirements, then
Alarm signal is sent by main website computer 11, to remind operating personnel to pay attention to.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, all technical solutions belonged under the utility model thinking belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, some improvement under the premise of the utility model principle is not departed from and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (5)
- A kind of 1. electric energy metering secondary overall operation situation on-Line Monitor Device, it is characterised in that：Including main website side unit (1) and at least one terminal unit (2), the main website side unit (1) include the main website computer (11) being connected with each other and metering dress On-line monitoring equipment (12) is put, the terminal unit (2) includes electric energy metering secondary (21), PT voltage acquisition modules (22), CT current acquisition modules (23), table voltage acquisition module (24) and table current acquisition module (25), the electrical energy measurement two Minor loop (21) includes voltage transformer pt, Current Transmit, electric energy meter (211) and electric energy acquisition terminal (212), described Voltage transformer pt, Current Transmit, electric energy acquisition terminal (212) are connected with electric energy meter (211) respectively, the PT voltages Acquisition module (22) is connected with the output terminal of voltage transformer pt, the CT current acquisition modules (23) and Current Transmit Output terminal is connected, the table wiring with electric energy meter (211) respectively of the table voltage acquisition module (24), table current acquisition module (25) Terminal is connected, the PT voltage acquisition modules (22), CT current acquisition modules (23), table voltage acquisition module (24) and table electric current The output terminal of acquisition module (25) is connected with electric energy acquisition terminal (212) respectively, and the electric energy acquisition terminal (212) is logical Network is crossed with metering device on-line monitoring equipment (12) to be connected.
- 2. electric energy metering secondary overall operation situation on-Line Monitor Device according to claim 1, it is characterised in that： The electric energy acquisition terminal (212) is connected by GPRS network with metering device on-line monitoring equipment (12).
- 3. electric energy metering secondary overall operation situation on-Line Monitor Device according to claim 2, it is characterised in that： The metering device on-line monitoring equipment (12) include signal processing interface module (121), multichannel A/D modular converters (122), Active pulse collection module (123), counter (124), dsp processor (125), microprocessor (126) and communication module (127), the signal processing interface module (121), active pulse collection module (123) respectively with electric energy acquisition terminal (212) it is connected, the signal processing interface module (121) passes through multichannel A/D modular converters (122) and dsp processor (125) It is connected, the active pulse collection module (123) is connected by counter (124) with dsp processor (125), the DSP processing Device (125), microprocessor are connected with each other between (126), and the microprocessor (126) passes through communication module (127) and main website Computer (11) is connected.
- 4. electric energy metering secondary overall operation situation on-Line Monitor Device according to claim 3, it is characterised in that： The communication module (127) is RS485 serial communication modulars.
- 5. electric energy metering secondary overall operation situation on-Line Monitor Device according to claim 3, it is characterised in that： Liquid crystal display mode, key-press module and history data repository are also associated with the microprocessor (126).
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| CN201721206110.9U CN207232382U (en) | 2017-09-20 | 2017-09-20 | Electric energy metering secondary overall operation situation on-Line Monitor Device |
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| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110456146A (en) * | 2019-09-04 | 2019-11-15 | 深圳宝龙达信创科技股份有限公司 | Power detection device and power detecting method |
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