CN106026180A - Solar photovoltaic grid-connected inverter - Google Patents

Solar photovoltaic grid-connected inverter Download PDF

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Publication number
CN106026180A
CN106026180A CN201610564151.9A CN201610564151A CN106026180A CN 106026180 A CN106026180 A CN 106026180A CN 201610564151 A CN201610564151 A CN 201610564151A CN 106026180 A CN106026180 A CN 106026180A
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CN
China
Prior art keywords
circuit
inverter
connects
control circuit
solar photovoltaic
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.)
Pending
Application number
CN201610564151.9A
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Chinese (zh)
Inventor
黄金杰
马龙振
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harbin University of Science and Technology
Original Assignee
Harbin University of Science and Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harbin University of Science and Technology filed Critical Harbin University of Science and Technology
Priority to CN201610564151.9A priority Critical patent/CN106026180A/en
Publication of CN106026180A publication Critical patent/CN106026180A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The invention discloses a solar photovoltaic grid-connected inverter comprising a solar cell, an inverter circuit, a filter, a power grid, a control circuit, and an alarm circuit. The solar cell is connected with the inverter circuit, the inverter circuit is connected with the filter, and the filter is connected with the power grid through an air circuit breaker. The output end of the solar cell is connected with a solar cell voltage and current sensor, and the solar cell voltage and current sensor is connected with the control circuit. The input end of the power grid is connected with a power grid voltage and current sensor, and the power grid voltage and current sensor is connected with the control circuit. The output end of the control circuit is connected with the alarm circuit. With the solar photovoltaic grid-connected inverter, the efficiency and stability of the whole solar photovoltaic grid-connected system are improved. When there is under voltage, over voltage or over current, the alarm circuit raises the alarm. Thus, the security of the whole solar photovoltaic grid-connected system is improved.

Description

A kind of solar photovoltaic interconnected inverter
Technical field
The present invention relates to solar energy generation technology field, specifically a kind of solar photovoltaic interconnected inverter.
Background technology
Development along with modern industry; global energy crisis and atmosphere polluting problem become increasingly conspicuous; traditional fuel energy reduces the most day by day; the harm causing environment becomes increasingly conspicuous; the supply of the energy is the most not enough, seeks new regenerative resource, changes mankind's energy resource structure; maintain long-range sustainable development, have become as the focus that people pay attention to.Solar electrical energy generation becomes a kind of new energy and is widely used.Existing solaode produces unidirectional current under irradiation by sunlight, owing to the conversion efficiency ratio all the time of solaode is relatively low, when electric power system needs liter high voltage or reduces voltage, in straight-flow system, buck technology is complex with device, therefore in photovoltaic generating system, outfit inverter it is being required for, owing to the output electric energy of solaode is relevant with the power of solar irradiation, and its state is a process that dynamically change replaces, so at the transmitting procedure inverter of electric energy easily because of under-voltage, overvoltage, cross stream and cause inverter to damage, and to measure voltage & current weak effect, reduce stability and the safety of solar photovoltaic grid-connection whole system.
Summary of the invention
It is an object of the invention to provide a kind of solar photovoltaic interconnected inverter, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
A kind of solar photovoltaic interconnected inverter, including solaode, inverter circuit, wave filter, electrical network, control circuit and warning circuit, described solaode connects inverter circuit, inverter circuit connects wave filter, wave filter connects electrical network by air-break, solaode outfan connects solar array voltage current sensor, solar array voltage current sensor connects control circuit, electrical network input connects line voltage current sensor, line voltage current sensor connects control circuit, and control circuit outfan connects warning circuit.
As the further scheme of the present invention: described inverter circuit is by DC/DC changer and DC/AC changer.
As the further scheme of the present invention: described inverter circuit input connection detection circuit, testing circuit connects control circuit.
As the further scheme of the present invention: described filter output connection detection circuit, testing circuit connects control circuit.
As the further scheme of the present invention: described control circuit connects inverter circuit.
Compared with prior art, the invention has the beneficial effects as follows: described a kind of solar photovoltaic interconnected inverter, improve efficiency and the stability of solar photovoltaic grid-connection whole system, when under-voltage, overvoltage occurring, crossing the situation of stream, warning circuit sends alarm, to improve the safety of solar photovoltaic grid-connection whole system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1-solaode, 2-inverter circuit, 3-wave filter, 4-electrical network, 5-solar array voltage current sensor, 6-line voltage current sensor, 7-testing circuit, 8-testing circuit, 9-control circuit, 10-warning circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
nullRefer to Fig. 1,In the embodiment of the present invention,A kind of solar photovoltaic interconnected inverter,Including solaode 1、Inverter circuit 2、Wave filter 3、Electrical network 4、Control circuit 9 and warning circuit 10,Described solaode 1 connects inverter circuit 2,Inverter circuit 2 is by DC/DC changer and DC/AC changer,Inverter circuit 2 connects wave filter 3,Wave filter 3 connects electrical network 4 by air-break,First the DC inverter rectification that solaode 1 produces is high-frequency alternating current by the DC/DC changer in inverter circuit 2,Then high-frequency ac electric rectification is high-frequency high-voltage direct-current electricity by DC/AC changer,Device 3 noise wave removing the most after filtering,The high voltage direct current exported after ensureing parallel network reverse is identical with electrical network 4 voltage same frequency,Improve efficiency and the stability of solar photovoltaic grid-connection whole system,Reduce cost.
Described solaode 1 outfan connects solar array voltage current sensor 5, and solar array voltage current sensor 5 connects control circuit 9, and inverter circuit 2 input connection detection circuit 7, testing circuit 7 connects control circuit 9;Electrical network 4 input connects line voltage current sensor 6, and line voltage current sensor 6 connects control circuit 9, and wave filter 3 outfan connection detection circuit 8, testing circuit 8 connects control circuit 9;Solar array voltage current sensor 5 and inverter circuit 2 gather solaode 1 outfan and the current and voltage data of inverter circuit 2 input respectively and pass to control circuit 9, line voltage current sensor 6 and testing circuit 8 detect electrical network 4 input and wave filter 3 output end current voltage data respectively and pass to control circuit 9, control circuit 9 connects inverter circuit 2, control circuit 9 outfan connects warning circuit 10, when under-voltage, overvoltage occurring, crossing the situation of stream, warning circuit 10 sends alarm, to improve the safety of solar photovoltaic grid-connection whole system.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above, it is intended that all changes fallen in the implication of equivalency and scope of claim included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
In addition, it is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should can also be formed, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that as an entirety, the technical scheme in each embodiment by those skilled in the art.

Claims (5)

1. a solar photovoltaic interconnected inverter, including solaode, inverter circuit, wave filter, electrical network, control circuit and warning circuit, it is characterized in that, described solaode connects inverter circuit, inverter circuit connects wave filter, wave filter connects electrical network by air-break, solaode outfan connects solar array voltage current sensor, solar array voltage current sensor connects control circuit, electrical network input connects line voltage current sensor, line voltage current sensor connects control circuit, control circuit outfan connects warning circuit.
A kind of solar photovoltaic interconnected inverter the most according to claim 1, it is characterised in that described inverter circuit is by DC/DC changer and DC/AC changer.
A kind of solar photovoltaic interconnected inverter the most according to claim 1, it is characterised in that described inverter circuit input connection detection circuit, testing circuit connects control circuit.
A kind of solar photovoltaic interconnected inverter the most according to claim 1, it is characterised in that described filter output connection detection circuit, testing circuit connects control circuit.
A kind of solar photovoltaic interconnected inverter the most according to claim 1, it is characterised in that described control circuit connects inverter circuit.
CN201610564151.9A 2016-07-18 2016-07-18 Solar photovoltaic grid-connected inverter Pending CN106026180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610564151.9A CN106026180A (en) 2016-07-18 2016-07-18 Solar photovoltaic grid-connected inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610564151.9A CN106026180A (en) 2016-07-18 2016-07-18 Solar photovoltaic grid-connected inverter

Publications (1)

Publication Number Publication Date
CN106026180A true CN106026180A (en) 2016-10-12

Family

ID=57119322

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610564151.9A Pending CN106026180A (en) 2016-07-18 2016-07-18 Solar photovoltaic grid-connected inverter

Country Status (1)

Country Link
CN (1) CN106026180A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203180801U (en) * 2013-01-06 2013-09-04 浙江海洋学院 Freestanding photovoltaic power generation device based on tandem type Z-source inverter
CN103457293A (en) * 2013-09-12 2013-12-18 南京欧陆电气传动有限公司 Single-phase grid connection inverter for solar photovoltaic power generation
CN203352474U (en) * 2013-07-15 2013-12-18 徐驰 Solar photovoltaic grid-connected inverter
CN203707802U (en) * 2014-02-14 2014-07-09 湖南城市学院 Photovoltaic grid connection power supply device
CN203839977U (en) * 2014-05-08 2014-09-17 上海理工大学 Photovoltaic inverting device
CN104300813A (en) * 2013-07-17 2015-01-21 河南省安耐德电力设备有限公司 Solar inverter
CN104682419A (en) * 2013-11-26 2015-06-03 陕西银河网电科技有限公司 Voltage type grid-connected inverter control system
CN105652723A (en) * 2014-08-22 2016-06-08 岑立强 Novel solar inverter controller

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203180801U (en) * 2013-01-06 2013-09-04 浙江海洋学院 Freestanding photovoltaic power generation device based on tandem type Z-source inverter
CN203352474U (en) * 2013-07-15 2013-12-18 徐驰 Solar photovoltaic grid-connected inverter
CN104300813A (en) * 2013-07-17 2015-01-21 河南省安耐德电力设备有限公司 Solar inverter
CN103457293A (en) * 2013-09-12 2013-12-18 南京欧陆电气传动有限公司 Single-phase grid connection inverter for solar photovoltaic power generation
CN104682419A (en) * 2013-11-26 2015-06-03 陕西银河网电科技有限公司 Voltage type grid-connected inverter control system
CN203707802U (en) * 2014-02-14 2014-07-09 湖南城市学院 Photovoltaic grid connection power supply device
CN203839977U (en) * 2014-05-08 2014-09-17 上海理工大学 Photovoltaic inverting device
CN105652723A (en) * 2014-08-22 2016-06-08 岑立强 Novel solar inverter controller

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Application publication date: 20161012