CN203479855U - Photovoltaic generating electric energy metering system for low-voltage users - Google Patents
Photovoltaic generating electric energy metering system for low-voltage users Download PDFInfo
- Publication number
- CN203479855U CN203479855U CN201320451675.9U CN201320451675U CN203479855U CN 203479855 U CN203479855 U CN 203479855U CN 201320451675 U CN201320451675 U CN 201320451675U CN 203479855 U CN203479855 U CN 203479855U
- Authority
- CN
- China
- Prior art keywords
- energy meter
- direct current
- electric energy
- energy
- electric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a photovoltaic generating electric energy metering system for low-voltage users. The system comprises a photovoltaic array, a DC combiner device, a DC electric energy meter, an AC electric energy meter, an electric energy consumption information acquisition device and a control computer. When an output of a grid-connected inverter is larger than requirements of a user load, unnecessary electric quantity output by the grid-connected inverter is recorded as reserve electric quantity by the AC electric energy meter; when the output of the grid-connected inverter is less than the requirements of the user load, an insufficient user load is extracted from a power supply low-voltage bus via the AC electric energy meter and recorded as positive electric quantity by the AC electric energy meter; and DC electric energy data is compared with reserve AC electric energy data, and electric energy consumption inspectors are reminded to inspect electric stealing events, which are suspected for defrauding photovoltaic generating subsidy, timely when abnormal conditions happen.
Description
Technical field
The utility model belongs to Electric Energy Metering Technology, specifically relates to a kind of low-voltage customer photovoltaic generation electric energy metered system.
Background technology
Distributed photovoltaic power generation refers to employing photovoltaic module, sun power is directly converted to the distributed generation system of electric energy.It is a kind of novel, tool generating with broad prospects for development and comprehensive utilization of energy mode, and it advocates generating nearby, grid-connected nearby, conversion nearby, the principle of using nearby.
The He Guowang company that develops rapidly of China's photovoltaic generation industry promotes a series of behaves of distributed photovoltaic power generation System Development, and to electric energy metrical, work has proposed lower requirement.Especially National Development and Reform Committee draws up in the situation of the electrovalence policy of determining encouragement photovoltaic generation, very likely occurs that photovoltaic generation user utilizes photovoltaic generation and electricity consumption price difference to try to gain the phenomenon of illegitimate benefits.At present, also do not have a set of corresponding system or method it is monitored, a series of relevant issues such as the stoichiometric point selection that discussion photovoltaic power generation grid-connecting relates to, anti-electricity-theft mode.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of low-voltage customer photovoltaic generation electric energy metered system.The utility model consists of direct current energy meter, AC energy meter, power information collecting device and acquisition system, control computing machine and daemon software; Direct current energy meter is responsible for measuring the size of the direct current energy of photovoltaic generation side, measured value by the collection of power information collecting device to controlling computing machine for comparing with AC generating data; Photovoltaic generating system is after inverter, AC is by being used the surf the Net metering of AC energy of AC energy meter, measured value by the collection of power information collecting device to controlling computing machine and DC side energy data compares, by Background control software, carried out the judgement of whether stealing: if there is not stealing event, AC electric energy is reported to main website; As there is stealing event, stealing affair alarm signal is sent to main website.
The purpose of this utility model is to adopt following technical proposals to realize:
A low-voltage customer photovoltaic generation electric energy metered system, is characterized in that, described system comprises photovoltaic array, direct current collector-shoe gear, direct current energy meter, AC energy meter, power information collecting device and controls computing machine;
The direct current energy that described photovoltaic array sends is by direct current collector-shoe gear access direct current energy meter;
The voltage and current signal of described direct current energy meter is sent into combining inverter, and after inverter, between AC signal incoming transport electric energy meter and customer charge, the electric flux of electrical network and forward user power utilization is oppositely sent in AC energy meter metering;
The direct current energy that direct current energy meter is measured carries out data acquisition with the alternating current energy of AC energy meter measurement by power information collecting device, through power information collecting device by communication to control system;
Described control system comprises
Comparison module, compares for direct current energy data and Opposed crossing energy data;
Alarm module, while being greater than direct current energy for alternating current energy, system will be sent warning.
Preferably, described AC energy meter is bidirectional measuring electric energy meter, for recording the reverse electric weight of the unnecessary electric weight of the forward electric weight that extracts from 220V power supply buses by AC energy meter and combining inverter output.
Preferably, described control system is for controlling computing machine or main website.
Preferably, described direct current energy meter can measuring voltage scope be 0-700V, and range of current is 0.1A-500A.
Compared with the prior art, the beneficial effects of the utility model are:
Make full use of the built power information acquisition system of State Grid Corporation of China as data acquisition and channel, reduce the cost for the anti-theft electric energy metering method of low-voltage customer distributed photovoltaic power generation.
The utility model can complete the electric energy metrical for low-voltage customer distributed photovoltaic power generation, and the measurement range of its electric current and voltage is determined by the measurement range of electric energy meter.
AC energy meter can be carried out the metering of bidirectional electric energy, thereby completing user is used electrical network electric weight and to electrical network, carries the twocouese function of measuring of electric weight.
Direct current energy data and Opposed crossing energy data are compared, when there are abnormal conditions, remind in time supervision of power consumption personnel to carry out in time doubtful stealing event supervision of gaining photovoltaic generation subsidy by cheating.
The utility model utilizes the measurement result of direct current energy meter and the anti-electricity-theft ability of a whole set of measuring apparatus that relatively improved of AC measurment result, for the evidence obtaining of electricity filching behavior provides means.
Accompanying drawing explanation
A kind of low-voltage customer photovoltaic generation electric energy metered system principle assumption diagram that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As described in Figure 1, a kind of low-voltage customer photovoltaic generation of the utility model electric energy metered system, specifically comprises photovoltaic array 1, direct current collector-shoe gear 2, direct current energy meter 3, combining inverter 4, AC energy meter 5, power information collecting device 7 and controls computing machine 8.
The direct current energy that photovoltaic array 1 sends carries out the measurement of direct current energy by direct current collector-shoe gear 2 access direct current energy meters 3, through the voltage and current signal of direct current energy meter 3, send into combining inverter 4, direct current signal after inverter becomes interchange, AC signal incoming transport electric energy meter 5 in parallel and customer charge 6, the electric flux of electrical network and forward user power utilization is oppositely sent in AC energy meter 5 meterings, the alternating current energy that the direct current energy that direct current energy meter 3 is measured and AC energy meter 5 are measured carries out data acquisition by power information collecting device 7, through power information collecting device 7 by communication to controlling computing machine or main website 8.
Direct current energy meter can directly be measured the electric flux after photovoltaic generation direct current confluxes.
AC energy meter, can carry out bidirectional electric energy metering, can carry out external magnetic field interference monitoring and abnormity of power supply monitoring, and the warning under abnomal condition can be provided.
Can carry out by power information collecting device collection and the transmission of the electric energy data that direct current energy meter and AC energy meter measure.
Background test system can be carried out data analysis, and judges stealing event.
Embodiment
The utility model adopts following flow process to realize, and is specially:
1, photovoltaic array is electric energy by light energy conversion, and by collector-shoe gear, the DC current of a plurality of solar panels is converged.Collector-shoe gear will be adjusted the electric current and voltage that is applicable to inverter, and exports this output signal to direct current energy meter.
2, direct current energy meter, by the calculating of sampling of the voltage and current signal of reception, obtains direct current energy, and this direct current energy is transferred to power information harvester by 485 buses or carrier signal.
3, power information collecting device utilizes received direct current energy information the transmission channels such as optical fiber/GPRS/ carrier wave to be uploaded to and controls computing machine or acquisition system main website.
4, the voltage and current signal by direct current energy meter passes through combining inverter, direct current signal is converted to the AC signal that can directly use.This AC signal incoming transport electric energy meter in parallel and customer charge, AC signal is connected to the 220V power supply buses of electric system after by AC energy meter.
5, AC energy meter is bidirectional measuring electric energy meter, and when the output of combining inverter is greater than needing of customer charge, the unnecessary electric weight of combining inverter output will be by the reverse electric weight of AC energy table record, and as DC power generation system the foundation to grid transmission; When the output of combining inverter is less than needing of customer charge, the load of user's deficiency will extract by AC energy meter from 220V power supply buses, and record forward electric weight, and to user, carry out the foundation of the charge of electricity using as electric system.
6, AC energy meter alternating voltage current signal that the combining inverter of reception is sent or that 220V power supply buses the sends calculating of sampling, obtain AC energy, and this AC energy is transferred to power information harvester by 485 buses or carrier signal.
7, power information collecting device utilizes received AC energy information the transmission channels such as optical fiber/GPRS/ carrier wave to be uploaded to and controls computing machine or acquisition system main website.
8, control computing machine, by software of the present utility model, the forward AC energy information collecting is directly used in to meterage foundation, direct current energy data and Opposed crossing energy data are compared, while occurring that alternating current energy is greater than direct current energy, software will send warning, remind supervision of power consumption personnel to carry out in time doubtful stealing event supervision of gaining photovoltaic generation subsidy by cheating.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although the utility model is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement embodiment of the present utility model, and do not depart from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (4)
1. a low-voltage customer photovoltaic generation electric energy metered system, is characterized in that, described system comprises photovoltaic array, direct current collector-shoe gear, direct current energy meter, AC energy meter, power information collecting device and controls computing machine;
The direct current energy that described photovoltaic array sends is by direct current collector-shoe gear access direct current energy meter;
The voltage and current signal of described direct current energy meter is sent into combining inverter, and after inverter, between AC signal incoming transport electric energy meter and customer charge, the electric flux of electrical network and forward user power utilization is oppositely sent in AC energy meter metering;
The direct current energy that direct current energy meter is measured carries out data acquisition with the alternating current energy of AC energy meter measurement by power information collecting device, through power information collecting device by communication to control system;
Described control system comprises
Comparison module, compares for direct current energy data and Opposed crossing energy data;
Alarm module, while being greater than direct current energy for alternating current energy, system will be sent warning.
2. a kind of low-voltage customer photovoltaic generation electric energy metered system as claimed in claim 1, it is characterized in that, described AC energy meter is bidirectional measuring electric energy meter, for recording the reverse electric weight of the unnecessary electric weight of the forward electric weight that extracts from 220V power supply buses by AC energy meter and combining inverter output.
3. a kind of low-voltage customer photovoltaic generation electric energy metered system as claimed in claim 1, is characterized in that, described control system is for controlling computing machine or main website.
4. a kind of low-voltage customer photovoltaic generation electric energy metered system as claimed in claim 1, is characterized in that, described direct current energy meter can measuring voltage scope be 0-700V, and range of current is 0.1A-500A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451675.9U CN203479855U (en) | 2013-07-26 | 2013-07-26 | Photovoltaic generating electric energy metering system for low-voltage users |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320451675.9U CN203479855U (en) | 2013-07-26 | 2013-07-26 | Photovoltaic generating electric energy metering system for low-voltage users |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203479855U true CN203479855U (en) | 2014-03-12 |
Family
ID=50228164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320451675.9U Expired - Lifetime CN203479855U (en) | 2013-07-26 | 2013-07-26 | Photovoltaic generating electric energy metering system for low-voltage users |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203479855U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439546A (en) * | 2013-07-26 | 2013-12-11 | 国家电网公司 | Electric energy measuring system and method for low-voltage user photovoltaic power generation |
| CN104569526A (en) * | 2015-02-02 | 2015-04-29 | 厦门市东港智能科技有限公司 | Photovoltaic metering box |
| CN106249042A (en) * | 2016-07-08 | 2016-12-21 | 国网山东省电力公司东营供电公司 | A kind of photovoltaic generation based on data analysis monitoring system and method |
| EP3276773A1 (en) * | 2016-07-26 | 2018-01-31 | Alcatel Lucent | Detection of fraudulent green energy producers for secure smart grids |
-
2013
- 2013-07-26 CN CN201320451675.9U patent/CN203479855U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439546A (en) * | 2013-07-26 | 2013-12-11 | 国家电网公司 | Electric energy measuring system and method for low-voltage user photovoltaic power generation |
| CN104569526A (en) * | 2015-02-02 | 2015-04-29 | 厦门市东港智能科技有限公司 | Photovoltaic metering box |
| CN106249042A (en) * | 2016-07-08 | 2016-12-21 | 国网山东省电力公司东营供电公司 | A kind of photovoltaic generation based on data analysis monitoring system and method |
| EP3276773A1 (en) * | 2016-07-26 | 2018-01-31 | Alcatel Lucent | Detection of fraudulent green energy producers for secure smart grids |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103439546A (en) | Electric energy measuring system and method for low-voltage user photovoltaic power generation | |
| CN103364631A (en) | High-voltage user photovoltaic power generation electric energy metering system and method thereof | |
| CN102305922B (en) | On-load detection method and device for intelligent optical fiber electric energy meter in substation | |
| CN103187735B (en) | Bidirectional intelligent gateway device for distributed new energy grid connection | |
| CN104283319A (en) | Intelligent distribution transformer terminal | |
| CN203479855U (en) | Photovoltaic generating electric energy metering system for low-voltage users | |
| CN203038449U (en) | Energy consumption data collector | |
| CN201909823U (en) | Power transmission line transient current-carrying capacity monitoring device | |
| CN201837674U (en) | Grid-connected photovoltaic power generation monitoring and analysis system | |
| CN104165660A (en) | Intelligent distribution and transformation monitoring terminal capable of calculating winding temperature | |
| Li et al. | Advanced metering standard infrastructure for smart grid | |
| CN202353321U (en) | Intelligent comprehensive electricity-distributing metering meter box | |
| CN202522906U (en) | Comprehensive electric energy information collector based on photovoltaic power station information system | |
| CN203350356U (en) | High-voltage user photovoltaic power generation energy metering system | |
| CN202041593U (en) | Running state evaluating device for new energy grid-connected power station | |
| CN109149767A (en) | A kind of base station electricity consumption differentiation and electric energy management system and method | |
| CN106249042A (en) | A kind of photovoltaic generation based on data analysis monitoring system and method | |
| CN202196118U (en) | Stepped billing electric energy meter | |
| CN201594099U (en) | Multifunctional electric energy meter | |
| CN209233491U (en) | A kind of photovoltaic plant management system of family grade | |
| CN201749553U (en) | Electric-power centralized meter reading system | |
| Yang et al. | The design of smart meter with power quality monitoring | |
| CN202565025U (en) | Alternating-current distribution multi-loop monitoring system | |
| CN102624091B (en) | Alternating current distribution multi-loop monitoring system | |
| CN201689169U (en) | Detector for low-voltage electric energy metering device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |