CN203350356U - High-voltage user photovoltaic power generation energy metering system - Google Patents

High-voltage user photovoltaic power generation energy metering system Download PDF

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Publication number
CN203350356U
CN203350356U CN 201320451581 CN201320451581U CN203350356U CN 203350356 U CN203350356 U CN 203350356U CN 201320451581 CN201320451581 CN 201320451581 CN 201320451581 U CN201320451581 U CN 201320451581U CN 203350356 U CN203350356 U CN 203350356U
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China
Prior art keywords
energy meter
direct current
transformer
energy
voltage
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CN 201320451581
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Inventor
林繁涛
陈松方
白静芬
赵莎
王猛
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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Abstract

The utility model relates to a high-voltage user photovoltaic power generation energy metering system. The system comprises a photovoltaic array, a direct-current confluence device, a direct-current electric energy meter, a grid-connection inverter, a step-up transformer, an alternating voltage transformer, an alternating current transformer, an alternating-current electric energy meter, a power consumption information collection device and a control computer. According to the system provided by the utility model, when the output of the grid-connection inverter exceeds the need of user load, the extra electric energy output by the grid-connection inverter is recorded as reverse power by the alternating-current electric energy meter; when the output of the grid-connection inverter is lower than the need of user load, the deficit in the user load is gotten from a high-voltage power supply busbar by the alternating-current electric energy meter, and recorded as forward power by the alternating-current electric energy meter; and direct-current power data is compared with reverse alternating-current power data, and power supervision personnel is warned to look into suspected electricity stealing events of cheating photovoltaic power generation subsidy in abnormal conditions.

Description

A kind of high pressure user photovoltaic generation electric energy metered system
Technical field
The utility model belongs to Electric Energy Metering Technology, specifically relates to a kind of high pressure user photovoltaic generation electric energy metered system.
Background technology
Distributed photovoltaic power generation refers to the employing photovoltaic module, sun power directly is 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, it advocates generating nearby, grid-connected nearby, conversion nearby, the principle of using nearby, but some illumination conditions remote province preferably, because physical environment extremely is applicable to photovoltaic generation, but the power consumption demand is little, can't apply on the spot.Therefore need to solve by boosting the loss problem in long-distance transport.
Develop rapidly and the state net company of China's photovoltaic generation industry promotes a series of behaves of distributed photovoltaic power generation System Development, and to electric energy metrical, work is had higher requirement.Especially, under National Development and Reform Committee draws up the situation of the electrovalence policy of determining the encouragement photovoltaic generation, very likely occur that the 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 the discussion photovoltaic power generation grid-connecting relates to, anti-electricity-theft mode.
The utility model content
For the deficiencies in the prior art, the utility model provides a kind of high pressure user photovoltaic generation electric energy metered system.The utility model consists of direct current energy meter, AC voltage transformer, AC current transformer, 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 surfed 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 the DC side energy data compares, carried out the judgement of whether stealing by Background control software: if the stealing event does not occur, the AC electric energy is reported to main website; As the stealing event occurs, stealing affair alarm signal is sent to main website.
The purpose of this utility model is to adopt following technical proposals to realize:
A kind of high pressure user photovoltaic generation electric energy metered system, it is characterized in that, described system comprises photovoltaic array, direct current collector-shoe gear, direct current energy meter, combining inverter, step-up transformer, AC voltage transformer, AC current transformer, AC energy meter, power information collecting device and control terminal;
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, through step-up transformer, boosted and the access user high voltage bus, and user's high voltage bus access user load;
User's high voltage bus accesses the power supply high voltage bus after AC voltage transformer, AC current transformer, through the small voltage current signal incoming transport electric energy meter of AC voltage transformer, AC current transformer conversion, the electric flux of electrical network and forward user power utilization is oppositely sent in the 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 the power information collecting device, through the power information collecting device by communication to control terminal;
Described control terminal comprises
Comparison module, compare for direct current energy data and Opposed crossing energy data;
Alarm module, while for the alternating current energy, being greater than the direct current energy, system will be sent warning.
Preferably, described AC energy meter is the bidirectional measuring electric energy meter, the reverse electric weight of the unnecessary electric weight of the forward electric weight extracted from the high voltage supply bus by AC energy meter for record and combining inverter output.
Preferably, described control terminal is for controlling computing machine or main website.
Preferably, but described direct current energy meter measuring voltage scope is 0-700V, and range of current is 0.1A-500A.
Preferably, the measurement range of described AC voltage transformer can reach 10kV, and the measurement range of AC current transformer can reach 2000A.
Compared with the prior art, the beneficial effects of the utility model are:
Take full advantage 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 high pressure user distribution formula photovoltaic generation.
The utility model can complete the electric energy metrical for high pressure user distribution formula photovoltaic generation, and the electric current and voltage range of its measurement determines according to the measurement range of voltage current transformer.
AC energy meter can be carried out the metering of bidirectional electric energy, thereby completing user is used the electrical network electric weight and carries the twocouese function of measuring of electric weight to electrical network.
Direct current energy data and Opposed crossing energy data are compared, when abnormal conditions occurring, remind in time the supervision of power consumption personnel to carry out in time doubtful stealing event supervision of gaining the 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.
The accompanying drawing explanation
A kind of high pressure user 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 high pressure user of the utility model photovoltaic generation electric energy metered system, specifically comprise photovoltaic array 1, direct current collector-shoe gear 2, direct current energy meter 3, combining inverter 4, increasing apparatus 5, AC voltage transformer 6, AC current transformer 7, AC energy meter 8, power information collecting device 10 and control computing machine 11.
Photovoltaic array is sent out 1 direct current energy gone out and is carried out the measurement of direct current energy by direct current collector-shoe gear 2 access direct current energy meters 3, send into combining inverter 4 through the voltage and current signal of direct current energy meter 3, direct current signal after inverter 4 becomes interchange, AC signal is boosted and the access user high voltage bus through increasing apparatus 5, user's high voltage bus can connect user load 9, user's high voltage bus is through voltage transformer (VT) 6, the rear access power supply high voltage of current transformer 7 bus, through voltage transformer (VT) 6, the small voltage current signal incoming transport electric energy meter 8 of current transformer 7 conversion, the electric flux of electrical network and forward user power utilization is oppositely sent in AC energy meter 8 meterings, the alternating current energy that the direct current energy that direct current energy meter 3 is measured and AC energy meter are measured carries out data acquisition by power information collecting device 10, through the power information collecting device by communication to controlling computing machine or main website 11.
Direct current energy meter can directly be measured the electric flux after the photovoltaic generation direct current confluxes.
Alternating voltage, AC current transformer can be measured ac high-voltage signal and AC great current signal.
AC energy meter, can carry out the 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 the power information collecting device collection and the transmission of the electric energy data that direct current energy meter and AC energy meter measure.
The background test system can be carried out data analysis, and judgement stealing event.
Embodiment
The utility model adopts following flow process to realize, 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 export 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 the power information harvester by 485 buses or carrier signal.
3, the power information collecting device utilizes optical fiber/transmission channels such as GPRS/ carrier wave to be uploaded to received direct current energy information 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, and this AC signal rises to the voltage consistent with bus by step-up transformer by voltage, and is connected to user's high voltage bus.
5, articulate user load on user's high voltage bus, and be connected on the power supply high voltage bus by voltage current transformer.
6, the secondary of voltage, current transformer is surveyed the little voltage and current signal of output, and the incoming transport electric energy meter.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 the power supply high voltage bus, and at AC energy table record forward electric weight, and carry out the foundation of the charge of electricity using to the user as electric system.
7, that the combining inverter of reception is sent or the alternating voltage current signal that the high voltage supply bus sends of AC energy meter is fixed ratio through mutual inductor and reduces, and the calculating of sampling, and obtains AC energy.And this AC energy is transferred to the power information harvester by 485 buses or carrier signal.
8, the power information collecting device utilizes optical fiber/transmission channels such as GPRS/ carrier wave to be uploaded to received AC energy information and controls computing machine or acquisition system main website.
9, control computing machine, by system of the present utility model, the forward AC energy information collected is directly used in to the meterage foundation, direct current energy data and Opposed crossing energy data are compared, while occurring that the alternating current energy is greater than the direct current energy, software will send warning, remind the supervision of power consumption personnel to carry out in time doubtful stealing event supervision of gaining the 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 with reference to above-described embodiment, the utility model is had been described in detail, 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 break away 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 (5)

1. a high pressure user photovoltaic generation electric energy metered system, it is characterized in that, described system comprises photovoltaic array, direct current collector-shoe gear, direct current energy meter, combining inverter, step-up transformer, AC voltage transformer, AC current transformer, AC energy meter, power information collecting device and control terminal;
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, through step-up transformer, boosted and the access user high voltage bus, and user's high voltage bus access user load;
User's high voltage bus accesses the power supply high voltage bus after AC voltage transformer, AC current transformer, through the small voltage current signal incoming transport electric energy meter of AC voltage transformer, AC current transformer conversion, the electric flux of electrical network and forward user power utilization is oppositely sent in the 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 the power information collecting device, through the power information collecting device by communication to control terminal;
Described control terminal comprises
Comparison module, compare for direct current energy data and Opposed crossing energy data;
Alarm module, while for the alternating current energy, being greater than the direct current energy, system will be sent warning.
2. a kind of high pressure user photovoltaic generation electric energy metered system as claimed in claim 1, it is characterized in that, described AC energy meter is the bidirectional measuring electric energy meter, the reverse electric weight of the unnecessary electric weight of the forward electric weight extracted from the high voltage supply bus by AC energy meter for record and combining inverter output.
3. a kind of high pressure user photovoltaic generation electric energy metered system as claimed in claim 1, is characterized in that, described control terminal is for controlling computing machine or main website.
4. a kind of high pressure user photovoltaic generation electric energy metered system as claimed in claim 1, it is characterized in that, but described direct current energy meter measuring voltage scope is 0-700V, and range of current is 0.1A-500A.
5. a kind of high pressure user photovoltaic generation electric energy metered system as claimed in claim 1, is characterized in that, the measurement range of described AC voltage transformer can reach 10kV, and the measurement range of AC current transformer can reach 2000A.
CN 201320451581 2013-07-26 2013-07-26 High-voltage user photovoltaic power generation energy metering system Active CN203350356U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364631A (en) * 2013-07-26 2013-10-23 国家电网公司 High-voltage user photovoltaic power generation electric energy metering system and method thereof
CN103983845A (en) * 2014-05-06 2014-08-13 浙江大学 Distributed power supply connecting user double-direction metering and monitoring system and method
CN106935023A (en) * 2015-12-30 2017-07-07 南京宇能新能源科技有限公司 New energy electric energy measurement instrument system and metering method based on optical communication network
GB2561916A (en) * 2017-04-28 2018-10-31 Gb Gas Holdings Ltd Method and system for detecting anomalies in energy consumption

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364631A (en) * 2013-07-26 2013-10-23 国家电网公司 High-voltage user photovoltaic power generation electric energy metering system and method thereof
CN103983845A (en) * 2014-05-06 2014-08-13 浙江大学 Distributed power supply connecting user double-direction metering and monitoring system and method
CN106935023A (en) * 2015-12-30 2017-07-07 南京宇能新能源科技有限公司 New energy electric energy measurement instrument system and metering method based on optical communication network
GB2561916A (en) * 2017-04-28 2018-10-31 Gb Gas Holdings Ltd Method and system for detecting anomalies in energy consumption
GB2561916B (en) * 2017-04-28 2021-09-22 Gb Gas Holdings Ltd Method and system for detecting anomalies in energy consumption
US11378415B2 (en) 2017-04-28 2022-07-05 Gb Gas Holdings Limited Method and system for detecting anomalies in energy consumption

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