CN109061286A - Off-grid is let out can type electric energy meter - Google Patents
Off-grid is let out can type electric energy meter Download PDFInfo
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- CN109061286A CN109061286A CN201810624516.1A CN201810624516A CN109061286A CN 109061286 A CN109061286 A CN 109061286A CN 201810624516 A CN201810624516 A CN 201810624516A CN 109061286 A CN109061286 A CN 109061286A
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- 230000005611 electricity Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photovoltaic Devices (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention relates to a kind of electric energy meters.Off-grid lets out energy type electric energy meter, it includes electric energy meter casing, power module, LCD MODULE, electric energy computation chip, microprocessor；Zero line output end is connected with the zero line output end of electric energy computation chip；It is characterized by: electric energy meter casing is equipped with ground terminal, ground terminal is connected by conducting wire with ground resistance；There is a single-pole double-throw switch (SPDT) in electric energy meter case body, the control terminal of the single-pole double-throw switch (SPDT) is connected with the control port of microprocessor, the input endpoint of single-pole double-throw switch (SPDT) is connected with fire wire output end, the output normal-closed end of single-pole double-throw switch (SPDT) is connected with the fire wire output end of electric energy computation chip, and the output normally open end of single-pole double-throw switch (SPDT) is connected with ground terminal.The electric energy meter has the function of that automatic off-grid lets out energy, the electrical shock safety risk of effective prevention and control low pressure photovoltaic user foldback electricity.
Description
Technical field
The present invention relates to a kind of electric energy meter (kilowatt-hour meters).
Background technique
Divide the modular design of family access scheme in state's net fortune [2016] No. 408 texts of inspection about low voltage public grid, it is desirable that
Distribution low-voltage side installs a set of anti-isolated island device additional, by realizing the choosing with each low-pressure line-outgoing of low-voltage comprehensive distribution box inside the device
Switching and electric blocking function are selected, photo-voltaic power supply anti-power transmission when preventing the maintenance of the area Gong Biantai from constructing.
But according to actual field investigation and daily O&M hidden troubles removing as a result, discovery install anti-isolated island device have with
Lower some limitations:
1, according to [2016] No. 408 literary modular designs, to be only used for platform area low for existing anti-isolated island device in power grid at present
Press distribution side, low-voltage network can only be prevented to the anti-power transmission of high-voltage fence, and low pressure photovoltaic user to platform area low-voltage distribution side and
The anti-power transmission of other low-voltage customers can only be controlled by the grid-connected switch (disconnecting link) of user's drawing, can not carry out unified management and
Intelligent control.And existing anti-isolated island device price is high, volume is big, installation maintenance require it is high, can not popularization and application given in counnter attack
The low pressure photovoltaic power generation user of electricity and the user of self energizing.
2, after the anti-isolated island device of user side puts into operation, power supply enterprise neither has the anti-isolated island appliance arrangement performance of periodic calibration
Obligation, user is also without the consciousness of maintenance power grid security.Such equipment is not belonging to the scope of metering whole-life cycle fee, device
The shortage of conventional detection work, the case where will lead to failure of apparatus, are difficult to manage in time, the anti-isolated island device of any one user side
Once failure, foldback electricity will the safety of personal safety and distribution running equipment to operating personnel damage.
3, wideling popularize with distribution of countries formula photovoltaic anti-poverty project, the low pressure photo-voltaic power supply user of the area Gong Biantai access
Quantity be doubled and redoubled year by year, the normal work of anti-isolated island device is particularly important, but the device does not have distant place concentration
The function of control.To ensure safety, before carrying out the maintenance construction of the area Gong Biantai, unit-area management person must cooperate field personnel
All anti-isolated island devices within the scope of interruption maintenance are operated manually one by one, and then for low capacity distributed photovoltaic power
It needs to disconnect air switch from door to door, and carries out correspondingly safety measure.Whole process is not only time-consuming and laborious, increases interruption maintenance
The risk of duration and customer complaint, and since locking measure can not effectively be implemented, safety can only be carried out by suspension nameplate
Risk control, can not effectively prevention and control low pressure photo-voltaic power supply and the power autonomous foldback electricity of user electrical shock safety risk.
Summary of the invention
The purpose of the present invention is to provide a kind of off-grids to let out energy type electric energy meter, which has the function of that off-grid lets out energy.
In order to achieve the object of the present invention, the technical solution used in the present invention is: off-grid lets out energy type electric energy meter, it includes
Electric energy meter casing, power module, LCD MODULE, electric energy computation chip, microprocessor；The power module and the electric energy
Metering chip, LCD MODULE are connected with microprocessor, and power module is for providing power supply；The electric energy computation chip and institute
Microprocessor connection is stated, the magnitude of power that electric energy computation chip is measured is transmitted to the microprocessor and handles；Institute
It states LCD MODULE to connect with the microprocessor, receive the data of the microprocessor transmission and is shown；Power supply mould
Block, LCD MODULE, electric energy computation chip and microprocessor are located in electric energy meter casing 7, and electric energy meter casing 7 is equipped with firewire
Input terminal 1, zero curve input terminal 2, zero line output end 3, fire wire output end 4, the firewire of firewire input terminal 1 and electric energy computation chip 8
Input terminal is connected, and zero curve input terminal 2 is connected with the zero curve input terminal of electric energy computation chip 8, zero line output end 3 and electrical energy measurement core
The zero line output end of piece 8 is connected；
It is characterized by: electric energy meter casing is equipped with ground terminal 5, ground terminal 5 is connected by conducting wire with ground resistance 6；Electric energy
There is a single-pole double-throw switch (SPDT) K in watch shell, the control terminal of the single-pole double-throw switch (SPDT) is connected with the control port of microprocessor, hilted broadsword
The input endpoint of commutator is connected with fire wire output end 4, output normal-closed end and the electric energy computation chip 8 of single-pole double-throw switch (SPDT)
Fire wire output end is connected, and the output normally open end of single-pole double-throw switch (SPDT) is connected with ground terminal 5.
Beneficial effects of the present invention: first is that being equipped with ground terminal using electric energy meter casing, ground terminal is by conducting wire and ground connection electricity
Resistance is connected；There is a single-pole double-throw switch (SPDT) in electric energy meter, which is connected with the control port of microprocessor, and microprocessor control is opened
It closes to jump and close, switch, which jumps, when needing to let out energy closes fire wire output end and ground terminal (by the process control of electric energy meter), with fire
The dump energy of the connected user's photo-voltaic power supply of line output terminal vents (energy of releasing) by ground terminal.The electric energy meter has automatic
Off-grid lets out energy function, and photovoltaic power generation user is effectively prevented from source to system and the anti-power transmission of other users, has filled up property right point
The technical safety measures of the area Jie Dianzhitai low-voltage distributing line counnter attack power transmission electric shock, effective prevention and control low pressure photo-voltaic power supply and user are certainly
Stand-by power source foldback electricity electrical shock safety risk.Second is that by by anti-isolated island function (i.e. off-grid let out can function) built-in intelligence ammeter, energy
The investment of anti-isolated island device and auxiliary material at present is reduced, system resource is saved.
Detailed description of the invention
Fig. 1 is that off-grid of the present invention lets out energy type electric energy meter (after anti-isolated island function built-in intelligence ammeter) low voltage public grid point family
Access scheme electric main wiring diagram.
Fig. 2 is structural schematic diagram of the invention.
In figure: 1- firewire input terminal, 2- zero curve input terminal, 3- zero line output end, 4- fire wire output end, 5- ground terminal, 6-
Ground resistance, 7- electric energy meter casing, 8- electric energy computation chip.
Specific embodiment
As shown in Figure 1 and Figure 2, off-grid lets out energy type electric energy meter, it includes electric energy meter casing, power module, liquid crystal display mode
Block, electric energy computation chip, microprocessor；The power module and the electric energy computation chip, LCD MODULE and micro process
Device connection, power module is for providing power supply；The electric energy computation chip is connect with the microprocessor, by electric energy computation chip
The magnitude of power that metering obtains is transmitted to the microprocessor and is handled；The LCD MODULE and the microprocessor connect
It connects, receive the data of the microprocessor transmission and is shown；Power module, LCD MODULE, electric energy computation chip and
Microprocessor is located in electric energy meter casing 7, and electric energy meter casing 7 is equipped with firewire input terminal 1, zero curve input terminal 2, zero line output end
3, fire wire output end 4, firewire input terminal 1 are connected with the firewire input terminal of electric energy computation chip 8, zero curve input terminal 2 and electric energy meter
The zero curve input terminal for measuring chip 8 is connected, and zero line output end 3 is connected with the zero line output end of electric energy computation chip 8；
Electric energy meter casing is equipped with ground terminal 5, and ground terminal 5 is connected by conducting wire with ground resistance 6；Have one in electric energy meter case body
Single-pole double-throw switch (SPDT) K, the control terminal of the single-pole double-throw switch (SPDT) are connected (by the program of electric energy meter with the control port of microprocessor
Control single-pole double-throw switch (SPDT) from output normally open end, output normal-closed end between jumped), the input endpoint of single-pole double-throw switch (SPDT) with
Fire wire output end 4 is connected, and the output normal-closed end of single-pole double-throw switch (SPDT) is connected (i.e. single with the fire wire output end of electric energy computation chip 8
Fire wire output end 4 and the fire wire output end of electric energy computation chip 8 are closed double-pole double throw switch in normal state), single-pole double throw is opened
The output normally open end of pass is connected (i.e. fire wire output end 4 and ground terminal 5 are closed, and photo-voltaic power supply energy ground connection vents) with ground terminal 5；
Firewire input terminal 1, zero curve input terminal 2 are connected with electric system, zero line output end 3, fire wire output end 4 and photovoltaic user (photovoltaic
Power supply) it is connected.
When distributed photovoltaic power normal power generation, system power grid has a power failure suddenly, and the dump energy of photo-voltaic power supply is needed to let out
Fall.The present invention realizes photo-voltaic power supply dump energy of releasing by the conversion closure of single-pole double-throw switch (SPDT) K.
Existing skill can be used in power module of the present invention, LCD MODULE, electric energy computation chip, microprocessor
Art.It is control circuit (prior art can also be used) that electric energy computation chip, microprocessor are also combinable.
First is that by by anti-isolated island function (i.e. off-grid lets out energy function) built-in intelligence ammeter, so that existing anti-isolated island device
It is moved forward to from user's property right separation kilowatt-hour meter from distribution transformer low-pressure line-outgoing side, is having for low voltage electric network counnter attack power transmission electric shock
Imitate technical safety measures, at the same can the anti-isolated island function of remote control switching, can effective identification switch state, grasp photovoltaic in real time
Power grid state.
The subprogram that wherein anti-isolated island function executes specifically includes that quality of voltage detection, and (inlet-outlet line voltage determination, whether there is or not electricity
Pressure judgement), grid-connected dot frequency determined, determined based on the built-in forward and reverse power of intelligent electric meter and the judgement of switch state.
Centralized remote control power-off is carried out to photovoltaic user by acquisition system before maintenance.It is two-way due to being disconnected in advance when maintenance
The grid-connected switch in the inside of electricity-measuring meter, can preferably prevent photo-voltaic power supply user accidentally close air switch and caused by misdeliver electricity.
After maintenance completion, increase to photovoltaic user progress checkout voltage judgement, realizes that photovoltaic user is single or batch all supplies, powers off function
Can, to guarantee that power distribution station low-voltage customer will not be because of wherein a certain family or more family photovoltaic plant anti-islanding disablers to electricity
Net foldback is electric and influences the safe and reliable power supply of the same other users in area.
Second is that metering whole-life cycle fee system is made full use of to solve the problems, such as no O&M.Integrate the electricity of anti-isolated island function
The meter assets that table is still within the scope of metering whole-life cycle fee can be by anti-isolated island for the meter of photo-voltaic power supply user
The detection of function is included in meter calibrating project, it is ensured that the anti-isolated island function of the operation meter for distributed photovoltaic power user
It is effectively controllable, the electrical shock safety risk of low pressure photovoltaic user foldback electricity when reducing the area Gong Biantai interruption maintenance conscientiously.
Claims (1)
1. off-grid let out can type electric energy meter, it includes electric energy meter casing, power module, LCD MODULE, electric energy computation chip, micro-
Processor；The power module is connect with the electric energy computation chip, LCD MODULE and microprocessor, and power module is used for
Power supply is provided；The electric energy computation chip is connect with the microprocessor, the magnitude of power that electric energy computation chip is measured
The microprocessor is transmitted to be handled；The LCD MODULE is connect with the microprocessor, receives the micro process
The data of device transmission are simultaneously shown；Power module, LCD MODULE, electric energy computation chip and microprocessor are located at electric energy meter
In shell (7), electric energy meter casing (7) is defeated equipped with firewire input terminal (1), zero curve input terminal (2), zero line output end (3), firewire
Outlet (4), firewire input terminal (1) are connected with the firewire input terminal of electric energy computation chip (8), zero curve input terminal (2) and electric energy meter
The zero curve input terminal for measuring chip (8) is connected, and zero line output end (3) are connected with the zero line output end of electric energy computation chip (8)；
It is characterized by: electric energy meter casing is equipped with ground terminal (5), ground terminal (5) is connected by conducting wire with ground resistance (6)；Electricity
There can be a single-pole double-throw switch (SPDT) (K) in watch shell, the control terminal of the single-pole double-throw switch (SPDT) is connected with the control port of microprocessor,
The input endpoint of single-pole double-throw switch (SPDT) is connected with fire wire output end (4), the output normal-closed end and electrical energy measurement of single-pole double-throw switch (SPDT)
The fire wire output end of chip (8) is connected, and the output normally open end of single-pole double-throw switch (SPDT) is connected with ground terminal (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624516.1A CN109061286B (en) | 2018-06-16 | 2018-06-16 | Off-grid energy release type electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810624516.1A CN109061286B (en) | 2018-06-16 | 2018-06-16 | Off-grid energy release type electric energy meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109061286A true CN109061286A (en) | 2018-12-21 |
| CN109061286B CN109061286B (en) | 2024-07-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810624516.1A Active CN109061286B (en) | 2018-06-16 | 2018-06-16 | Off-grid energy release type electric energy meter |
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| CN (1) | CN109061286B (en) |
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|---|---|---|---|---|
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| US20160329721A1 (en) * | 2014-01-13 | 2016-11-10 | Gng Electrical Pty Ltd | Zero export relay |
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| US20170302081A1 (en) * | 2016-04-14 | 2017-10-19 | Det International Holding Limited | Power supply arrangement |
| CN107732971A (en) * | 2017-11-14 | 2018-02-23 | 福建网能科技开发有限责任公司 | A kind of band bidirectional current protection distributed grid-connected access case |
| CN208736931U (en) * | 2018-06-16 | 2019-04-12 | 王德松 | A kind of off-grid is let out can type electric energy meter |
-
2018
- 2018-06-16 CN CN201810624516.1A patent/CN109061286B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080034530A (en) * | 2006-10-17 | 2008-04-22 | 한국전기연구원 | Islanding detection method for microgrid and its device |
| US20100201348A1 (en) * | 2007-10-17 | 2010-08-12 | Hubei Shengjia Electric Apparatus Co., Ltd. | Modular energy meter |
| US20160329721A1 (en) * | 2014-01-13 | 2016-11-10 | Gng Electrical Pty Ltd | Zero export relay |
| CN106026160A (en) * | 2016-03-17 | 2016-10-12 | 国家电网公司 | Distributed photovoltaic generation anti-islanding protective device |
| US20170302081A1 (en) * | 2016-04-14 | 2017-10-19 | Det International Holding Limited | Power supply arrangement |
| CN205809581U (en) * | 2016-06-16 | 2016-12-14 | 赵怀方 | A kind of intelligent switch |
| CN206076966U (en) * | 2016-07-27 | 2017-04-05 | 江苏孟弗斯新能源工程有限公司 | A kind of intelligent distributed photovoltaic power generation is grid-connected and switching control grid-connection cabinet |
| CN106253336A (en) * | 2016-08-19 | 2016-12-21 | 长园深瑞继保自动化有限公司 | Distributed power source isolated island effect prevention relay protecting method |
| CN107732971A (en) * | 2017-11-14 | 2018-02-23 | 福建网能科技开发有限责任公司 | A kind of band bidirectional current protection distributed grid-connected access case |
| CN208736931U (en) * | 2018-06-16 | 2019-04-12 | 王德松 | A kind of off-grid is let out can type electric energy meter |
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| Publication number | Publication date |
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| CN109061286B (en) | 2024-07-19 |
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