CN103944176A - Double-channel unidirectional controlled energy storage inverter system - Google Patents
Double-channel unidirectional controlled energy storage inverter system Download PDFInfo
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- CN103944176A CN103944176A CN201310021208.7A CN201310021208A CN103944176A CN 103944176 A CN103944176 A CN 103944176A CN 201310021208 A CN201310021208 A CN 201310021208A CN 103944176 A CN103944176 A CN 103944176A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The invention belongs to the field of electric power energy storage inversion technologies and particularly relates to a double-channel unidirectional controlled energy storage inverter system. The double-channel unidirectional controlled energy storage inverter system comprises a photovoltaic and new energy access end, an MPPT and bidirectional DC/AC module, an alternating current protection and switching module, a charge and discharge module, a charge and discharge path regulation and control module, a discharge sensing circuit, a charge path switching circuit, a charge and discharge selective switch A, a charge and discharge selective switch B, a storage battery A, a storage battery B, a charge anti-countercurrent circuit, a discharge anti-countercurrent circuit, a charge bus, a discharge bus, a power grid and a load end. According to the system, two or more groups of storage batteries are utilized, a monitoring module is utilized to carry out real-time monitoring, the corresponding storage batteries in the charge and discharge states are controlled in a double-channel unidirectional controlled mode and the whole charge or discharge process is independently carried out in a corresponding state, so that the service lives of the storage batteries are prolonged, the reliability and security of the energy storage inverter system is improved, and the robustness and the black-start capability of the energy storage inverter system are enhanced.
Description
Technical field
The invention belongs to energy storage inverter technology field, be specifically related to the unidirectional controlled energy storage inverter system of a kind of two-way.
Background technology
The extensive use of new forms of energy electric power and micro-electrical network, has promoted the development of energy storage inverter and system, therefore on market, has occurred many energy storage inverter products.As: the product of the company of inverter enterprise " sunlight power supply " of world-renowned ABB AB and Chinese Famous, for grid-connected and networking and the generating power supply of New-energy power system provide support, make contribution.
But the being seen energy storage inverter in prior art and market and system product, mainly the UPS technical development for subsequent use based on energy storage, its energy storage section all adopts a group storage battery to be connected to two-way inverter circuit DC terminal formation, its shortcoming is: in the time having load to power, even accumulator positive is in charging, storage battery also can be transformed into the state discharging, and makes batteries not be subject in fact the control of charge-discharge control circuit, has a strong impact on working healthily and the service life of storage battery; And, in micro-electrical network, energy storage inversion system is mainly born the power grid environment important task that supports micro-electrical network, single group storage battery set constructor is after battery discharging, need to supplement certain electric weight and just can make inverter circuit task power supply again, this be because starting resistor higher than the minimum voltage that can discharge and arrange, to this, if new forms of energy power generation is not enough or do not generate electricity, will affect inverter circuit and again start and work, even make micro-electrical network paralysis.
Summary of the invention
For overcoming the above-mentioned defect of prior art and product, the present invention proposes " the unidirectional controlled energy storage inverter system of a kind of two-way ".Realize the life-span of improving storage battery, increase reliability and fail safe, strengthen robustness and the black start-up ability of energy storage inversion system.
Technical scheme of the present invention is the unidirectional controlled energy storage inverter system of a kind of two-way, comprising: photovoltaic and new forms of energy incoming end, MPPT and two-way DC/AC module, harmonics and switch module, charging and discharging module, charging and discharging path regulation and control module, electric discharge sensing circuit, charge path switching circuit, charge and discharge selector switch A, charge and discharge selector switch B, batteries A, batteries B, charging counterflow-preventing circuit, discharge-preventing adverse current circuit, charging bus, electric discharge bus, electrical network and load end; It is characterized in that:
Photovoltaic electric power PV accesses photovoltaic and new forms of energy incoming end, is connected MPPT and two-way DC/AC module and harmonics and switch module and be connected to electrical network and load end by photovoltaic and new forms of energy incoming end, forms photovoltaic electric power supply path;
By photovoltaic and new forms of energy incoming end, connect charging and discharging module and meet charge and discharge selector switch A and meet batteries A and batteries B by charge and discharge selector switch A and charge and discharge selector switch B through charge path switching circuit and charging bus and the counterflow-preventing circuit that charges by photovoltaic and new forms of energy incoming end, forming photovoltaic electric power charge path;
Net electricity access electrical network and load end, be connected harmonics and switch module and MPPT and two-way DC/AC module with load end by electrical network, access charging and discharging module and meet charge and discharge selector switch A and meet batteries A and batteries B by charge and discharge selector switch A and charge and discharge selector switch B through charge path switching circuit and charging bus and the counterflow-preventing circuit that charges by MPPT and two-way DC/AC module, forming and net electric charge path;
Batteries A and batteries B are connected electric discharge bus and are connected charging and discharging module through discharge-preventing adverse current circuit with electric discharge sensing circuit by charge and discharge selector switch A and charge and discharge selector switch B, connect MPPT and two-way DC/AC module by charging and discharging module again and harmonics is connected to electrical network and load end with switch module, formation electric power storage supply path;
Charging and discharging path regulation and control module connects respectively electric discharge sensing circuit and charge path switching circuit, forms Inspecting Storage Battery SOC and charging and discharging path regulation and control link;
Control method is:
" the unidirectional controlled energy storage inverter system of a kind of two-way " that the present invention proposes, utilization arranges 2 groups and above batteries and is controlledly connected work by two-way unidirectional path with two-way inverter circuit, make the batteries of charging and discharging to walk abreast and independently to fill respectively, the overall process of electric discharge, and the electric weight difference of different conditions between batteries is controlled in utilization, ensure that inverter circuit is all the time in starting electric weight and range of voltage values, the life-span of the storage battery greatly improving, reliability and fail safe are increased, strengthen robustness and the black start-up ability of energy storage inversion system.
Brief description of the drawings
Fig. 1 is the energy storage inversion system principle of work and power schematic diagram of prior art;
Fig. 2 is the principle of work and power schematic diagram of the unidirectional controlled energy storage inverter system of a kind of two-way.
Embodiment
As examples of implementation, by reference to the accompanying drawings the unidirectional controlled energy storage inverter system of a kind of two-way is described, still, technology of the present invention and scheme are not limited to the content that the present embodiment provides.
Accompanying drawing 1 has provided the energy storage inversion system principle of work and power schematic diagram of prior art, shown in figure, the energy storage inversion system of prior art adopts a group storage battery to be connected to two-way inverter circuit DC terminal formation, its shortcoming is: in the time having load to power, even accumulator positive is in charging, storage battery also can be transformed into the state discharging, and makes batteries not be subject in fact the control of charge-discharge control circuit, has a strong impact on working healthily and the service life of storage battery.
Fig. 2 has provided the unidirectional controlled energy storage inverter system principle of work and power schematic diagram of a kind of two-way, shown in figure, the unidirectional controlled energy storage inverter system of a kind of two-way that the present invention proposes, comprise: photovoltaic and new forms of energy incoming end (1), MPPT and two-way DC/AC module (2), harmonics and switch module (3), charging and discharging module (4), charging and discharging path regulation and control modules (5a), electric discharge sensing circuit (5b), charge path switching circuit (5c), charge and discharge selector switch A (6a), charge and discharge selector switch B (6b), batteries A (7a), batteries B (7b), charging counterflow-preventing circuit (8a), discharge-preventing adverse current circuit (8b), charging bus (9a), electric discharge bus (9b), electrical network and load end (10), it is characterized in that:
Photovoltaic electric power PV accesses photovoltaic and new forms of energy incoming end (1), is connected MPPT and two-way DC/AC module (2) and harmonics and switch module (3) and be connected to electrical network and load end (10) by photovoltaic and new forms of energy incoming end (1), forms photovoltaic electric power supply path;
By photovoltaic and new forms of energy incoming end (1), connect charging and discharging module (4) and meet charge and discharge selector switch A (6a) and meet batteries A (7a) and batteries B (7b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b) through charge path switching circuit (5c) and charging bus (9a) and the counterflow-preventing circuit (8a) that charges by photovoltaic and new forms of energy incoming end (1), forming photovoltaic electric power charge path;
Net electricity access electrical network and load end (10), be connected harmonics and switch module (3) and MPPT and two-way DC/AC module (2) with load end (10) by electrical network, access charging and discharging module (4) and meet charge and discharge selector switch A (6a) and meet batteries A (7a) and batteries B (7b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b) through charge path switching circuit (5c) and charging bus (9a) and the counterflow-preventing circuit (8a) that charges by MPPT and two-way DC/AC module (2), form the electric charge path of net,
Batteries A (7a) and batteries B (7b) are connected electric discharge bus (9b) and are connected charging and discharging module (4) through discharge-preventing adverse current circuit (8b) with electric discharge sensing circuit (5b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b), connect MPPT and two-way DC/AC module (2) by charging and discharging module (4) again and harmonics is connected to electrical network and load end (10) with switch module (3), formation electric power storage supply path;
Charging and discharging path regulation and control modules (5a) connect respectively electric discharge sensing circuit (5b) and charge path switching circuit (5c), form Inspecting Storage Battery SOC and charging and discharging path regulation and control link.
Its control method is:
As examples of implementation, the electricity generation module (4) that charges in this programme enters discharge mode, when charging and discharging path regulation and control modules (5a) are monitored electric discharge bus (9b) and had discharging current by electric discharge sensing circuit (5b), charging and discharging path regulation and control modules (5a) drive the charge path switching circuit (5c) of controlling the bus (9a) that makes to charge to be placed in disconnection; When charging and discharging module (4) enters charge mode, electric discharge bus (9b) does not have discharging current, when charging and discharging path regulation and control modules (5a) are monitored the bus (9b) that discharges and be there is no discharging current by electric discharge sensing circuit (5b), charging and discharging path regulation and control modules (5a) drive control, the charge path switching circuit (5c) of bus (9a) of making to charge is placed in closed position, the electric-controlled switch circuit of bus (9a) of charging returns to conducting state, enters charge mode.
By the enforcement of the technical program, effectively realize generating, electric power storage, power supply and grid-connected and from the shared multifunctional usage energy storage inversion system of net, not only improve the life-span of storage battery, also increase reliability and the fail safe of energy storage inversion system, strengthened robustness and the black start-up ability of energy storage inversion system.
Claims (1)
1. the unidirectional controlled energy storage inverter system of two-way, comprise: photovoltaic and new forms of energy incoming end (1), MPPT and two-way DC/AC module (2), harmonics and switch module (3), charging and discharging module (4), charging and discharging path regulation and control modules (5a), electric discharge sensing circuit (5b), charge path switching circuit (5c), charge and discharge selector switch A (6a), charge and discharge selector switch B (6b), batteries A (7a), batteries B (7b), charging counterflow-preventing circuit (8a), discharge-preventing adverse current circuit (8b), charging bus (9a), electric discharge bus (9b), electrical network and load end (10), it is characterized in that:
Photovoltaic electric power PV accesses photovoltaic and new forms of energy incoming end (1), is connected MPPT and two-way DC/AC module (2) and harmonics and switch module (3) and be connected to electrical network and load end (10) by photovoltaic and new forms of energy incoming end (1), forms photovoltaic electric power supply path;
By photovoltaic and new forms of energy incoming end (1), connect charging and discharging module (4) and meet charge and discharge selector switch A (6a) and meet batteries A (7a) and batteries B (7b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b) through charge path switching circuit (5c) and charging bus (9a) and the counterflow-preventing circuit (8a) that charges by photovoltaic and new forms of energy incoming end (1), forming photovoltaic electric power charge path;
Net electricity access electrical network and load end (10), be connected harmonics and switch module (3) and MPPT and two-way DC/AC module (2) with load end (10) by electrical network, access charging and discharging module (4) and meet charge and discharge selector switch A (6a) and meet batteries A (7a) and batteries B (7b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b) through charge path switching circuit (5c) and charging bus (9a) and the counterflow-preventing circuit (8a) that charges by MPPT and two-way DC/AC module (2), form the electric charge path of net,
Batteries A (7a) and batteries B (7b) are connected electric discharge bus (9b) and are connected charging and discharging module (4) through discharge-preventing adverse current circuit (8b) with electric discharge sensing circuit (5b) by charge and discharge selector switch A (6a) and charge and discharge selector switch B (6b), connect MPPT and two-way DC/AC module (2) by charging and discharging module (4) again and harmonics is connected to electrical network and load end (10) with switch module (3), formation electric power storage supply path;
Charging and discharging path regulation and control modules (5a) connect respectively electric discharge sensing circuit (5b) and charge path switching circuit (5c), form Inspecting Storage Battery SOC and charging and discharging path regulation and control link;
Its control method is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310021208.7A CN103944176B (en) | 2013-01-22 | 2013-01-22 | A kind of unidirectional controlled energy storage inverter system of two-way |
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| CN201310021208.7A CN103944176B (en) | 2013-01-22 | 2013-01-22 | A kind of unidirectional controlled energy storage inverter system of two-way |
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| CN103944176B CN103944176B (en) | 2016-12-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111264012A (en) * | 2017-11-17 | 2020-06-09 | 艾思玛太阳能技术股份公司 | Method for black start of an energy supply device, bidirectional inverter and energy supply device having a bidirectional inverter |
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Patent Citations (4)
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| CN101673963A (en) * | 2009-02-10 | 2010-03-17 | 路建乡 | Wind and solar hybrid generation system for communication base station based on dual direct-current bus control |
| US20110115295A1 (en) * | 2009-11-19 | 2011-05-19 | Chong-Sop Moon | Energy management system and grid-connected energy storage system including the energy management system |
| CN102088190A (en) * | 2009-12-03 | 2011-06-08 | 三星Sdi株式会社 | Grid-connected power storage system and method for controlling grid-connected power storage system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111264012A (en) * | 2017-11-17 | 2020-06-09 | 艾思玛太阳能技术股份公司 | Method for black start of an energy supply device, bidirectional inverter and energy supply device having a bidirectional inverter |
| CN111264012B (en) * | 2017-11-17 | 2024-03-08 | 艾思玛太阳能技术股份公司 | Method for black start of energy supply device, bi-directional inverter and energy supply device with bi-directional inverter |
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