CN103645363B - Bidirectional measuring three-phase intelligent electric-energy meter - Google Patents
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Abstract
The invention discloses a kind of bidirectional measuring three-phase intelligent electric-energy meter, control end including input front end, output rear end, three phase metering module, built-in power relay, the first control end and second；Input front end connects three-phase mains net, output rear end connects the first contact unit and the second contact unit the most respectively, connect between input front end and output rear end and have three phase metering module and built-in power relay, first controls end connects the first contact unit, second controls end connects the second contact unit, first control end or second controls end and sends control information to the first contact unit or the second contact unit, controls the first contact unit or the Guan Bi of the second contact unit and disconnection.The present invention passes through bidirectional measuring technology, solves the grid-connected metering method of double-ammeter type of routine, simultaneously can integrated intelligent data acquisition, the function such as parameter management, is familial distribution of cases formula energy electricity generation grid-connecting preferable bidirectional measuring intelligent meter scheme.
Description
Technical field
The present invention relates to familial distribution of cases formula energy electricity generation grid-connecting technical field, particularly relate to a kind of bidirectional measuring three
Phase intelligent electric energy meter.
Background technology
Currently for familial distribution of cases formula energy electricity generation grid-connecting, typically having two kinds of ways, one is " online electricity
Valency, the state monopoly for purchase and marketing " connect-in strategy under policy, this way be by PV ammeter before electric supply meter (i.e.
Electrical network side), need to take double grid-connected metered scheme of ammeter.Another kind is under " clean electric quantity metering " policy
Connect-in strategy, this scheme long period measures generating electricity and the consumption electricity in distributed power station.For above-mentioned two
Plant metering connect-in strategy, be required to use double ammeter metering.And use two ammeter not only costs to increase, and
And space requirement is bigger, adds fault rate simultaneously, improve maintenance cost.
Summary of the invention
Based on this, the invention provides a kind of bidirectional measuring three-phase intelligent electric-energy meter.
A kind of bidirectional measuring three-phase intelligent electric-energy meter, including input front end, output rear end, three phase metering module,
Built-in power relay, the first control end and second control end；Described input front end connects three-phase mains net,
Described output rear end connects the first contact unit and the second contact unit the most respectively, wherein,
Described first contact unit connects distributed energy power generating network, and described second contact unit connects three-phase and bears
Carry；Connect between described input front end and output rear end and have described three phase metering module and described built-in power
Relay, described three phase metering module is for measuring flowing through electricity；
Described first controls end connects described first contact unit, and described second controls end connects described second
Contact unit, described first controls end or described second controls end to described first contact unit or described
Second contact unit sends control information, controls described first contact unit or described second catalyst list
The Guan Bi of unit and disconnection.
Compared with general technology, the present invention passes through bidirectional measuring technology, solves the double-ammeter type of routine also
Network metering mode, simultaneously can integrated intelligent data acquisition, the function such as parameter management, is the familial distribution of cases formula energy
Electricity generation grid-connecting preferable bidirectional measuring intelligent meter scheme.The present invention uses the intelligent electric energy meter of bidirectional measuring technology
Carrying out grid-connected, electric energy meter can be configured to the metering method of algebraical sum metering method or absolute value, has meritorious
Forward, meritorious reverse, idle forward, the function of idle reverse metering.Have only to during bidirectional measuring use one
Individual ammeter measures, and provides cost savings and space, reduces fault rate.The present invention can realize system pipes simultaneously
Reason function, electric energy meter and TRT inversion, protection master control system realize communication, carry out data interaction, no
Only data can be reported main station system, beneficially partial power management, it is possible to open portion function is given and used
Family, it is achieved power department and user's condominium.
Accompanying drawing explanation
Fig. 1 be bidirectional measuring three-phase intelligent electric-energy meter of the present invention grid-connected time structural representation；
Fig. 2 is the structural representation of one preferred embodiment of bidirectional measuring three-phase intelligent electric-energy meter of the present invention；
Fig. 3 is the workflow schematic diagram of bidirectional measuring three-phase intelligent electric-energy meter of the present invention.
Detailed description of the invention
By further illustrating the technological means and the effect of acquirement that the present invention taked, below in conjunction with the accompanying drawings and
Preferred embodiment, to technical scheme, carries out clear and complete description.
Bidirectional measuring three-phase intelligent electric-energy meter of the present invention, including input front end, output rear end, three phase metering mould
Block, built-in power relay, the first control end and second control end；Described input front end connects three-phase mains
Net, described output rear end connects the first contact unit and the second contact unit the most respectively,
Wherein, described first contact unit connects distributed energy power generating network, and described second contact unit connects
Threephase load；Described input front end and output rear end between connect have described three phase metering module and described in
Putting power relay, described three phase metering module is for measuring flowing through electricity；
Described first controls end connects described first contact unit, and described second controls end connects described second
Contact unit, described first controls end or described second controls end to described first contact unit or described
Second contact unit sends control information, controls described first contact unit or described second catalyst list
The Guan Bi of unit and disconnection.
Refer to Fig. 1, for the bidirectional measuring three-phase intelligent electric-energy meter of the present invention structural representation time grid-connected.
Described input front end connects three-phase and four-line utility grid, and three-phase and four-line electrical network accesses three-phase intelligent electric-energy meter,
Contact unit two (the i.e. second contact unit, lower same) access user load end is passed through in ammeter output rear end,
Electric energy meter controls 2(that is second and controls end simultaneously) control information control contactor unit two can be exported, permissible
Realize Guan Bi and the disconnection of catalyst, user load end and front end are cut off.Another electric energy meter output rear end is in parallel
Accessing contact unit one (the i.e. first contact unit, lower same), generating dress is accessed in contact unit one rear end
The inversion put, master control system, TRT is being accessed in the rear end of inversion master control system.Electric energy meter output control 1
(i.e. first controls end) can export control information, control contactor device unit one, it is achieved contact unit
Guan Bi and disconnection, distributed energy power generating network and front end electrical network are disconnected.It addition, electric energy meter can pass through
485 communications and TRT realize data communication, and by electric energy meter, the information such as relevant real time data are reported electricity
The main station system of power department, and develop part functional realiey power department and user's condominium, technology can be obtained
On guarantee.It is beneficial to the management of the safety problems such as island effect simultaneously, strengthens power grid security, ensure electrical network inspection
Personal safety and electric appliance safety when repairing.
Preferably, described built-in power relay is for realizing disconnection and the Guan Bi of three-phase mains net.In described
Put the magnetic latching relay that power relay is 120A.
Preferably, described first contact unit connects the inversion master control system in distributed energy power generating network,
Described inversion master control system connects the TRT in distributed energy power generating network.
As one of them embodiment, when three-phase mains net is individually powered to threephase load, described in-built electrical
Power relay closes, and described first controls end sends control information to described first contact unit, controls institute
Stating the first contact unit to disconnect, described second controls end sends control information to described second contact unit,
Control described second contact unit Guan Bi.
When the independent powering load of utility grid, three-phase electric energy meter built-in power relay closes, electric energy meter control
Contact unit one processed, catalyst disconnects and being disconnected by distributed energy power generating network, control contactor unit simultaneously
Two, load end is accessed electrical network by catalyst Guan Bi, and now, only electrical network powering load, the sense of current is
Forward, electric energy meter forward measures, and load end consumption how many electricity can all measure.
As one of them embodiment, when distributed energy power generating network is individually powered to threephase load, described
Built-in power relay disconnects, and described first controls end sends control information to described first contact unit,
Controlling described first contact unit Guan Bi, described second controls end sends control to described second contact unit
Information processed, controls described second contact unit Guan Bi.
When the independent powering load of distributed energy power generating network, three-phase electric energy meter built-in power relay disconnects,
Electric energy meter control contactor unit one, power generating network is accessed by catalyst Guan Bi.Control contactor unit two simultaneously,
Load end is accessed power generating network by catalyst Guan Bi, it is achieved the independent powering load of power generating network.
As one of them embodiment, when whole electricity of distributed energy power generating network are supplied three-phase mains net
Time, described built-in power relay closes, and described first controls end sends control to described first contact unit
Information processed, controls described first contact unit Guan Bi, and described second controls end to described second catalyst list
Unit sends control information, controls described second contact unit and disconnects.
When by whole for power generating network electricity supply utility grid, three-phase electric energy meter built-in power relay closes, electricity
Energy table control contactor unit one, power generating network is accessed by catalyst Guan Bi.Control contactor unit two simultaneously,
Catalyst disconnects and being disconnected by load end, it is achieved power generating network whole electricity supply utility grid.Now, electric energy meter control
TRT master control system processed, makes power generating network electrical quantity meet grid-connected requirement, just allows grid-connected.Electrical energy meter electricity
Flow path direction is that reversely electric energy meter reversely measures, and power generating network can all measure to the electricity of utility grid confession.
As one of them embodiment, when the generated energy of distributed energy power generating network is more than the consumption of threephase load
Electricity, when distributed energy power generating network gives threephase load and three-phase mains net power supply simultaneously, described built-in power
Relay closes, and described first controls end sends control information to described first contact unit, controls described
First contact unit Guan Bi, described second controls end sends control information to described second contact unit,
Control described second contact unit Guan Bi.
When generated energy is more than consumption electricity, power generating network is powered to utility grid while powering to load end, and three
Phase electric energy meter built-in power relay closes, electric energy meter control contactor unit one, and catalyst Guan Bi will generating
Net accesses.Control contactor unit two simultaneously, load end is accessed power generating network by catalyst Guan Bi, it is achieved generating
Net is powered to utility grid while powering to load end.Now, electric energy meter controls TRT master control system,
Make power generating network electrical quantity meet grid-connected requirement, just allow grid-connected.Owing to consumption electricity is less than generated energy, generating
Netting unnecessary electricity and be also supplied with utility grid, electrical energy meter electricity flow path direction is that reversely electric energy meter reversely measures, and sends out
Electrical network can all measure to the electricity of utility grid confession.
As one of them embodiment, when the generated energy of distributed energy power generating network is less than the consumption of threephase load
When electricity, distributed energy power generating network and three-phase mains net are powered to threephase load simultaneously, described built-in power
Relay closes, and described first controls end sends control information to described first contact unit, controls described
First contact unit Guan Bi, described second controls end sends control information to described second contact unit,
Control described second contact unit Guan Bi.
When generated energy less than consumption electricity time, power generating network power to load end while utility grid also give load end
Power supply, three-phase electric energy meter built-in power relay closes, and electric energy meter control contactor unit one, catalyst closes
Close and power generating network is accessed.Control contactor unit two simultaneously, load end is accessed electrical network by catalyst Guan Bi, real
Existing power generating network, utility grid is powered to load end simultaneously.Now, electric energy meter controls TRT master control system,
Make power generating network electrical quantity meet grid-connected requirement, just allow grid-connected.Owing to consumption electricity is more than generated energy, civil power
Net for a part of inadequate electricity, electrical energy meter electricity flow path direction be forward to, electric energy meter forward measures, utility grid
Can all measure to the electricity of load end confession.
When settling accounts with Utilities Electric Co., settle accounts according to " rate for incorporation into the power network, the state monopoly for purchase and marketing " policy, it is only necessary to
The form of clearness allowance is taked to sell electric power reverse electricity (i.e. the electricity of distributed energy power generating network confession) public
Department, forward electricity (i.e. consuming electricity) is according to normal price charging.Thus can realize " rate for incorporation into the power network,
The state monopoly for purchase and marketing " electricity clearing under policy.
Settle accounts according to " clean electricity " policy, it is only necessary to reverse electricity, (i.e. distributed energy power generating network supplies
Electricity) and forward electricity (i.e. consuming electricity) do algebraical sum calculate, it is simply that power generating network is supplied utility grid
Take out with consumption electricity.Thus can realize the electricity clearing under clean electricity plan.
The intelligent electric energy meter of this programme is wide-range three-phase electric energy meters based on Luo-coil Sampling techniques, and often
Rule electric energy meter compares, and has voltage power supply wide ranges (phase voltage AC45V～300V), current measurement range
Wide (5～100A), the temperature working range (-40 DEG C～+70 DEG C) of ultra-wide, low-temperature-rise, error is stable, anti-strong
Magnetic, the advantage such as anti-DC component.
When realizing bidirectional measuring three-phase intelligent electric-energy meter of the present invention, parameters of electric energy meter can be set and require as follows:
Parameters of electric energy meter: measure voltage range: 3 × 45V～300V(phase voltage)；Amount measures electric current: 5A；
Maximum measurement electric current: 100A；Specified measurement frequency: 50Hz；Class of accuracy: meritorious class1, idle
class2；Meter constant: meritorious 1000imp/KWh, idle 1000imp/Kvarh；Operating temperature range:
-40 DEG C～+70 DEG C；The mode of connection: three-phase and four-line；Table access way: direct access
Electric energy meter performance requirement: starting current: 0.2%Ib；Shunt running: when to electric energy meter apply specified measurement voltage,
When 0.1%Ib, rated operational voltage, should not measure；The class of insulation: 4000V ac；Dustproof and waterproof grade: IP54；
Power consumption: 1W(is without GPRS module)；
Product function requires:
Electric energy metrical pattern: support many rates metering method；There is forward and reverse metering method；Configurable algebraically
And metering method；Configurable absolute value metering method；
Electric parameter instantaneous value: instantaneous voltage；Transient current；Instantaneous frequency；Instantaneous power；
Fault detect: CPU operation irregularity；Storage failure；Metering link is abnormal；
Communication interface: GPRS module compatibility PLC module；RS485 communication；Photoelectric communication；MBUS leads to
News；
Pulse output interface: LED pulse exports, and meets IEC standard；Electric pulse exports, and meets IEC mark
Accurate；
Structural Design Requirement: the direct-type mode of connection；Overall dimensions meets state's net three-phase intelligent list structure standard；
Lead sealing adds anti-theft screw；Degree of protection: IP54；It is accurate that Anti-vibration Design meets state's network mark；Electro Magnetic Compatibility meets
State's net intelligent three-phase table standard.
Hardware is realized, it is preferred that hardware circuit can be made up of such as lower part: power management, and electricity is adopted
Collection, data process, communication module, man machine interface etc..Specifically see Fig. 2, for bidirectional measuring three of the present invention
The structural representation of one preferred embodiment of phase intelligent electric energy meter.
Power management section, mainly realize exchange by switching power source chip turns direct current to power management section,
For the power supply of ammeter internal work, power is up to 10W, it is possible to ensure that this maximum functional electricity consumption designed needs
Ask.
Using model is the efficient AD-DC switching power source chip of TOP258, maximum power output up to
10W, average efficiency, more than 80%, has the voltage power supply scope of ultra-wide, main road output supply main circuit
Unit, auxiliary output supplying module and communication interface circuit, auxiliary output power source with exchange between input satisfied every
From the resistance to pressure request of 4000V.
Electric quantity acquisition part: voltage sample is by high-accuracy, and Low Drift Temperature resistance pressure-dividing network carries out voltage sample,
And by RC filtering, voltage sampling signal sent into three phase metering chip.Current sample passes through high-performance Roche line
Circle carries out current sample, and is filtered by RC current sampling signal is sent into three phase metering chip.Computation chip
Using the IDT90E36 three-phase electrical energy computation chip of Integrated Device Technology, Inc., this is a high accuracy three phase metering chip,
Can be with measurement circuitry voltage, electric current, frequency.Can calculate active power, reactive power, apparent energy with
And instantaneous rms voltage, electric current.7 single 2 rank sigma-delta ADC of Embedded, it may be achieved
Three voltage path (A, B and C phase) in three-phase four wire system and four current paths (A, B, C phase and
Center line), support that neutral line current is measured, stealing detects.Additional channel is integrated with complete signal path, it is allowed to
Perform various measurement.Each input channel all supports independent and gain stage flexibly, and therefore this device is suitable for each
Plant current sensor to be used together, such as Luo-coil, current transformer (CT) and low resistance shunt resistance etc..
Three phase metering chip can be by metering depositor in SPI communication interface accessing sheet, it is achieved the reading of related data
Taking, electric energy meter is calibrated.The data of three phase metering chip process selects 32 arm processors of ST company
STM32L151VD, low in energy consumption based on ARM@Cortex TM-M3 kernel, power-down mode, it is especially suitable for
Battery powered application.There is the features such as fast operation, low-power consumption, it is ensured that gather power grid electric information
And the real-time of communication.Main control chip is mainly responsible for the management of peripheral modules circuit.
Communication module part: GPRS module, is mainly responsible for and between the upstream plant such as concentrator and data acquisition unit
Data exchange, real time data is sent to main station system, and realizes the main website associative operation to electric energy meter.
PLC module and GPRS module interface compatibility are replaceable, are mainly responsible for by power line carrier communication real
Now the data with harvester exchange, it is achieved the data reading system etc. of harvester.Photoelectric communication mainly realizes host computer
Directly and the communication of electric energy meter, it is achieved electricity, the copy reading of real time data, the configuration etc. of other funtion parts.
RS485 interface mainly realizes, the cascade between electric energy meter, and data exchange, the data reading system etc. of harvester.
RS485 communication side between this programme compatibility and distributed energy TRT inversion, protection master control system simultaneously
Formula, it is possible to achieve electric network data is shared, it is achieved the master control system of TRT is operated by electric energy meter, system of main website
The system management to electricity generation system, the protection etc. of island effect.The meter bus of MBUS communication compatibility international standard
EBI can realize the water meter to compatible MBUS interface, gas meter, the copy reading of hotlist, it is achieved family divides
The intelligent management of cloth energy scheme.
Data process: use the eeprom memory of a piece of 256K bit to realize calibration data, and ammeter is correlated with
The storage of configuration information.
Use the ferroelectric memory significant data for storing electricity etc of a piece of 64K bit.Use a piece of
The dataflash of 16Mbit is for the storage of load curve, firmware remote upgrade.
Man machine interface: liquid crystal display uses the segment liquid crystal of 160 sections, and the display of liquid crystal is to pass through special liquid crystal
Driving chip realizes.Ammeter has 2 aobvious buttons of wheel, and one of them can pin with lead sealing for programming key.
It addition, ammeter has game clock lid detection button, beginning lid button.
Other parts circuit: the magnetic latching relay of the built-in a 120A of ammeter, realizes electrical network for operating a switch
Disconnect.Ammeter has 2 tunnels and controls output, for controlling the cut-out of external contactor unit, and Guan Bi.Ammeter
Onboard a piece of magnetic induction chip, is used for detecting external magnetic field, it is achieved the detection of strong magnetic stealing.Ammeter uses one
Sheet hardware RTC chip is as the clock unit of ammeter.Ammeter is the most built-in hardware watchdog chip, to ensure
The stable operation of system.
Part is realized for software, uses the single-threaded software flow that AM/BAM is mutual, and if dividing by function
Dry software module, is beneficial to improve the maintainability of program code, transplantability and concertedness, mainly include with
Under several functional modules: metering processing module；Communication processing module；Task repeating query processing module；At power down
Reason module.
Refer to Fig. 3, for the workflow schematic diagram of bidirectional measuring three-phase intelligent electric-energy meter of the present invention.
Measurement error data: measured data is the data by the detection of laboratory electric energy meter detection platform, are to belong to
In standard error calibration method, using verification platform for electric energy meter fully-automated synthesis, comparison other is calibration power source.
Please refer to electric energy meter error detection method in detail.
The measurement error data result of bidirectional measuring three-phase intelligent electric-energy meter of the present invention is shown in Table 1 to table 4.Wherein:
Table 1 is the measurement error data of the meritorious forward metering of bidirectional measuring three-phase intelligent electric-energy meter of the present invention；
Table 2 is the measurement error data of the meritorious reversely metering of bidirectional measuring three-phase intelligent electric-energy meter of the present invention；
Table 3 is the measurement error data of the idle forward metering of bidirectional measuring three-phase intelligent electric-energy meter of the present invention；
Table 4 is the measurement error data of the idle reverse metering of bidirectional measuring three-phase intelligent electric-energy meter of the present invention.
Compared with general technology, the present invention passes through bidirectional measuring technology, solves the double-ammeter type of routine also
Network metering mode, simultaneously can integrated intelligent data acquisition, the function such as parameter management, is the familial distribution of cases formula energy
Electricity generation grid-connecting preferable bidirectional measuring intelligent meter scheme.The present invention uses the intelligent electric energy meter of bidirectional measuring technology
Carrying out grid-connected, electric energy meter can be configured to the metering method of algebraical sum metering method or absolute value, has meritorious
Forward, meritorious reverse, idle forward, the function of idle reverse metering.Have only to during bidirectional measuring use one
Individual ammeter measures, and provides cost savings and space, reduces fault rate.The present invention can realize system pipes simultaneously
Reason function, electric energy meter and TRT inversion, protection master control system realize communication, carry out data interaction, no
Only data can be reported main station system, beneficially partial power management, it is possible to open portion function is given and used
Family, it is achieved power department and user's condominium.
The measurement error data of the meritorious forward metering of table 1 bidirectional measuring of the present invention three-phase intelligent electric-energy meter
The measurement error data of the meritorious reversely metering of table 2 bidirectional measuring of the present invention three-phase intelligent electric-energy meter
The measurement error data of the idle forward metering of table 3 bidirectional measuring of the present invention three-phase intelligent electric-energy meter
The measurement error data of the idle reverse metering of table 4 bidirectional measuring of the present invention three-phase intelligent electric-energy meter
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (5)
1. a bidirectional measuring three-phase intelligent electric-energy meter, it is characterised in that include input front end, output rear end,
Three phase metering module, built-in power relay, the first control end and second control end；Described input front end is even
Connecing three-phase mains net, described output rear end connects the first contact unit and second the most respectively and connects
Tentaculum unit, wherein, described first contact unit connects distributed energy power generating network, described second contact
Device unit connects threephase load；Connect between described input front end and output rear end and have described three phase metering mould
Block and described built-in power relay, described three phase metering module is for measuring flowing through electricity；
Described first controls end connects described first contact unit, and described second controls end connects described second
Contact unit, described first controls end sends control information to described first contact unit, controls described
First contact unit Guan Bi and disconnection, described second controls end controls to described second contact unit transmission
Information, controls described second contact unit Guan Bi and disconnects；
When three-phase mains net is individually powered to threephase load, described built-in power relay closes, and described the
One controls end sends control information to described first contact unit, controls described first contact unit and disconnects,
Described second controls end sends control information to described second contact unit, controls described second catalyst list
Unit's Guan Bi；
When distributed energy power generating network is individually powered to threephase load, described built-in power relay disconnects,
Described first controls end sends control information to described first contact unit, controls described first catalyst list
Unit's Guan Bi, described second controls end sends control information to described second contact unit, controls described second
Contact unit closes；
When whole electricity of distributed energy power generating network being supplied three-phase mains net, described built-in power relay
Device closes, and described first controls end sends control information to described first contact unit, controls described first
Contact unit closes, and described second controls end sends control information to described second contact unit, controls
Described second contact unit disconnects；
When the generated energy of distributed energy power generating network is more than the consumption electricity of threephase load, and distributed energy generates electricity
When net gives threephase load and three-phase mains net power supply simultaneously, described built-in power relay closes, and described first
Control end and send control information to described first contact unit, control described first contact unit Guan Bi,
Described second controls end sends control information to described second contact unit, controls described second catalyst list
Unit's Guan Bi；
When the generated energy of distributed energy power generating network is less than the consumption electricity of threephase load, and distributed energy generates electricity
When net and three-phase mains net are powered to threephase load simultaneously, described built-in power relay closes, and described first
Control end and send control information to described first contact unit, control described first contact unit Guan Bi,
Described second controls end sends control information to described second contact unit, controls described second catalyst list
Unit's Guan Bi.
Bidirectional measuring three-phase intelligent electric-energy meter the most according to claim 1, it is characterised in that described defeated
Enter front end and connect three-phase and four-line utility grid.
Bidirectional measuring three-phase intelligent electric-energy meter the most according to claim 1, it is characterised in that in described
Put power relay for realizing disconnection and the Guan Bi of three-phase mains net.
Bidirectional measuring three-phase intelligent electric-energy meter the most according to claim 3, it is characterised in that in described
Put the magnetic latching relay that power relay is 120A.
Bidirectional measuring three-phase intelligent electric-energy meter the most according to claim 1, it is characterised in that described
One contact unit connects the inversion master control system in distributed energy power generating network, and described inversion master control system is even
Connect the TRT in distributed energy power generating network.
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| CN105354929A (en) * | 2015-11-23 | 2016-02-24 | 成都兴联宜科技有限公司 | Three-phase four-wire electronic prepayment electric energy meter |
| CA3024185C (en) | 2016-05-26 | 2023-03-28 | Landis+Gyr Innovations, Inc. | Utility meter for use with distributed generation device |
| CN109374964A (en) * | 2018-10-30 | 2019-02-22 | 四川洪诚电气科技有限公司 | Use electric detection method and Internet of things system based on Internet of Things |
| US11187734B2 (en) | 2019-05-31 | 2021-11-30 | Landis+Gyr Innovations, Inc. | Systems for electrically connecting metering devices and distributed energy resource devices |
| US11506693B2 (en) | 2019-10-11 | 2022-11-22 | Landis+Gyr Innovations, Inc. | Meter and socket for use with a distributed energy resource device |
| CN112129995B (en) * | 2020-09-25 | 2023-03-21 | 中国电力科学研究院有限公司 | Renewable energy power production and consumption metering method and system |
| CN112886642B (en) * | 2021-03-19 | 2022-11-18 | 厦门科华数能科技有限公司 | Double-ammeter redundant grid-connected and off-grid control circuit and micro-grid system |
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