CN103683459A - Hybrid inverter with uninterruptible power supply function - Google Patents
Hybrid inverter with uninterruptible power supply function Download PDFInfo
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- CN103683459A CN103683459A CN201310649185.4A CN201310649185A CN103683459A CN 103683459 A CN103683459 A CN 103683459A CN 201310649185 A CN201310649185 A CN 201310649185A CN 103683459 A CN103683459 A CN 103683459A
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Abstract
The invention provides a hybrid inverter with the uninterruptible power supply function. The hybrid inverter with the uninterruptible power supply function comprises a transducer, a bidirectional transducer, a bidirectional inverter, a bus, a controller, a first switch and a second switch. One end of the first switch and one end of the second switch are connected, a first port is led out from the other end of the first switch, a second port is led out from the other end of the second switch, a third port is led out from the middle of the two switches, the first port is connected with alternating-current output of a hybrid inverter body, and the second port and the third port are used for being connected with a power grid and a load respectively; one end of the transducer is connected to new energy power generation units such as a photovoltaic power system, the other end of the transducer is connected with the bus, one end of the bidirectional transducer is connected to an energy storage unit, the other end of the bidirectional transducer is connected to the bus, one end of the bidirectional inverter is connected with the bus, and the other end of the bidirectional inverter is connected with the first port. When one of the power grid and the inverter breaks down, an important load still conducts power supply and interruptible power supply is achieved.
Description
Technical field
The present invention relates to a kind of inverter, relate in particular to a kind of mixing inverter with uninterrupted power supply function.
Background technology
It is grid-connected that traditional combining inverter only can be realized photovoltaic power, when electric network fault disconnects, can only shut down, and cannot, from net power supply, more cannot realize the demand of UPS (the Uninterrupted Power Supply) uninterrupted power supply of important load.
At present, solar power generation has been obtained large-scale application, and the proportion of solar power generation in electrical network also improves day by day.Intermittence and randomness due to solar power generation, cause certain impact to electrical network.The Europe of greatly developing at solar energy, has started to limit solar grid-connected maximum power, and along with the reduction of cost for solar power generation, photovoltaic subsidized price also declines year by year.
Therefore the mixing inverter with storage battery becomes solar inverter development trend.
When the generated output of photovoltaic module is greater than power limitation, by unnecessary power storage, at battery, when photovoltaic module power declines, battery is connected to the grid the energy of storage again, brings into play to greatest extent the generating capacity of photovoltaic module.
If photovoltaic subsidized price drops to, allow user feel grid-connected uneconomical even loss of capital, the electric energy that photovoltaic module can be sent is except for load, and all the other electric energy are all stored in battery, treat night and overcast and rainy use.
Summary of the invention
The present invention proposes to mix inverter structure, when realizing energy storage and grid-connected function, can provide independent power supply interface, realizes the uninterrupted power supply demand of important load.
The invention provides a kind of mixing inverter with uninterrupted power supply function, it comprises converter, reversible transducer, bus, two-way inverter, controller, first via switch, the second way switch;
One end of first via switch, the second way switch joins, a port is drawn in the other end of double switch and the centre of double switch, be respectively the first port, the second port, the 3rd port, the first port is connected with the interchange output that mixes inverter main body, and the second port, the 3rd port are respectively used to be connected with electrical network, load;
Access generation of electricity by new energy unit, converter one end, the other end is connected with bus, reversible transducer one end access energy-storage units, the other end is connected with bus, two-way inverter one end connection bus, the other end is connected with the first port;
Controller detects also control change device, reversible transducer, two-way inverter, bus, first via switch, the second way switch;
Controller receives the electric power of generation of electricity by new energy unit to input by control change device, controls charge and discharge and the protection of energy-storage units by controlling reversible transducer, by controlling output and the input of two-way inverter control alternating electromotive force, and maintains bus power-balance;
When controller judgement electrical network is normal, inverter is when normal, controller, by control signal, makes first via switch, the second way switch all closed;
When controller judgement electric network fault, when inverter is normal, controller allows the second way switch disconnect rapidly by control signal, and first via switch is closed simultaneously;
When controller judgement electrical network is normal, when inverter is abnormal, controller allows first via switch disconnect rapidly by control signal, and the second way switch is closed simultaneously.
As a further improvement on the present invention, first via switch is to be formed by single or multiple switch series parallel combinations.
As a further improvement on the present invention, the second way switch is to be formed by single or multiple switch series parallel combinations.
As a further improvement on the present invention, first via switch, the second way switch are mechanical switch or are controlled power electronic device.
As a further improvement on the present invention, first via switch, the second way switch are all built in and mix inverter inside, or it is independently complete to be placed on mixing inverter outside, or part is in mixing inverter inside, partly outside at mixing inverter.
As a further improvement on the present invention, in the mixing inverter of family expenses, important load is connected on the 3rd port.
As a further improvement on the present invention, mix the bus of inverter as an independent part, be connected with converter, reversible transducer, two-way inverter.
As a further improvement on the present invention, bus is distributed to one or more in converter, reversible transducer, two-way inverter, and the port that converter, reversible transducer, two-way inverter are originally connected with bus is directly connected.
The invention has the beneficial effects as follows:
When electrical network or while mixing in inverter a fault, important load still can be powered, and realizes uninterrupted power supply.
In the mixing inverter of family expenses, some important loads can be allowed, as illumination, computer etc. are connected on N3 mouth, when electric network fault or fault of converter, uninterrupted power supply can be realized.
Accompanying drawing explanation
Fig. 1 is a kind of application schematic diagram with the mixing inverter of uninterrupted power supply function of the present invention.
K is the isolation panel switches between civil power and inverter.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
The present invention introduces energy-storage units, reversible transducer, two-way inverter and a switching network being comprised of K1, K2 and corresponding controller in combining inverter, and this controller can control switch K1, K2 and the unit of mixing inverter, as shown in Figure 1.
Controller, by controlling each converter, is controlled the input of photovoltaic energy, the input of the charge and discharge of energy-storage units, power grid energy and output, maintains bus balance and is followed the tracks of bearing power variation.And detect the state of converter in figure, reversible transducer, two-way inverter, and the voltage and current of electrical network (between K switch and electrical network), judge that whether electrical network and inverter be normal.
When controller judgement electrical network is normal, inverter is when normal, controller is by control signal (as relay dry contact signal), make K1, K2 all closed, mix like this inverter and electrical network by K1, K2 exchange electric energy, load by K1 and K2 by electrical network or inverter power supply;
When controller judgement electric network fault, when inverter is normal, controller allows K2 disconnect rapidly by control signal, by electrical network and inverter, load isolation, and K1 closure simultaneously, load realizes uninterrupted power supply by K1 by inverter;
When controller judgement electrical network is normal, when inverter is abnormal, controller allows K1 disconnect rapidly by control signal, by inverter and electrical network, load isolation, and K2 closure simultaneously, load realizes uninterrupted power supply by K2 by electrical network;
If inverter and controller failure, what connect due to K2 is normally-closed contact, and K1 is normally opened contact, and K2 is automatically closed, and K1 disconnects automatically, isolated fault inverter, and load realizes uninterrupted power supply by K2.
During one of them fault of electrical network and inverter, only need a switch motion, and only need two switches, cost is low.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a mixing inverter with uninterrupted power supply function, is characterized in that: it comprises converter, reversible transducer, bus, two-way inverter, controller, first via switch, the second way switch;
One end of first via switch, the second way switch joins, a port is drawn in the other end of double switch and the centre of double switch, be respectively the first port, the second port, the 3rd port, the first port is connected with the interchange output that mixes inverter main body, and the second port, the 3rd port are respectively used to be connected with electrical network, load;
Access generation of electricity by new energy unit, converter one end, the other end is connected with bus, reversible transducer one end access energy-storage units, the other end is connected with bus, two-way inverter one end connection bus, the other end is connected with the first port;
Controller detects also control change device, reversible transducer, two-way inverter, bus, first via switch, the second way switch;
Controller receives the electric power of generation of electricity by new energy unit to input by control change device, controls charge and discharge and the protection of energy-storage units by controlling reversible transducer, by controlling output and the input of two-way inverter control alternating electromotive force, and maintains bus power-balance;
When controller judgement electrical network is normal, inverter is when normal, controller, by control signal, makes first via switch, the second way switch all closed;
When controller judgement electric network fault, when inverter is normal, controller allows the second way switch disconnect rapidly by control signal, and first via switch is closed simultaneously;
When controller judgement electrical network is normal, when inverter is abnormal, controller allows first via switch disconnect rapidly by control signal, and the second way switch is closed simultaneously.
2. a kind of mixing inverter with uninterrupted power supply function according to claim 1, is characterized in that: first via switch is to be formed by single or multiple switch series parallel combinations.
3. a kind of mixing inverter with uninterrupted power supply function according to claim 1, is characterized in that: the second way switch is to be formed by single or multiple switch series parallel combinations.
4. a kind of mixing inverter with uninterrupted power supply function according to claim 1, is characterized in that: first via switch, the second way switch are mechanical switch or are controlled power electronic device.
5. a kind of mixing inverter with uninterrupted power supply function according to claim 1, it is characterized in that: first via switch, the second way switch are all built in and mix inverter inside, or it is outside independent complete to be placed on mixing inverter, or part is inner at mixing inverter, part is outside at mixing inverter.
6. a kind of mixing inverter with uninterrupted power supply function according to claim 1, is characterized in that: in the mixing inverter of family expenses, important load is connected on the 3rd port.
7. a kind of mixing inverter with uninterrupted power supply function according to claim 1, is characterized in that: mix the bus of inverter as an independent part, be connected with converter, reversible transducer, two-way inverter.
8. a kind of mixing inverter with uninterrupted power supply function according to claim 1, it is characterized in that: bus is distributed to one or more in converter, reversible transducer, two-way inverter, the port that converter, reversible transducer, two-way inverter are originally connected with bus is directly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310649185.4A CN103683459A (en) | 2013-12-04 | 2013-12-04 | Hybrid inverter with uninterruptible power supply function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310649185.4A CN103683459A (en) | 2013-12-04 | 2013-12-04 | Hybrid inverter with uninterruptible power supply function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518672A (en) * | 2014-11-21 | 2015-04-15 | 深圳市航天新源科技有限公司 | Three-port converter with magnetic integration function and zero port current ripples |
| CN105897032A (en) * | 2016-03-21 | 2016-08-24 | 江苏峰谷源储能技术研究院有限公司 | Auxiliary power supply of bidirectional energy storage inverter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023156A (en) * | 2011-09-20 | 2013-04-03 | 三星Sdi株式会社 | Battery managing apparatus, battery pack, and energy storage system |
| US20130293020A1 (en) * | 2012-05-07 | 2013-11-07 | Samsung Sdi Co., Ltd. | Battery system, method of controlling the same, and energy storage system including the battery system |
-
2013
- 2013-12-04 CN CN201310649185.4A patent/CN103683459A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023156A (en) * | 2011-09-20 | 2013-04-03 | 三星Sdi株式会社 | Battery managing apparatus, battery pack, and energy storage system |
| US20130293020A1 (en) * | 2012-05-07 | 2013-11-07 | Samsung Sdi Co., Ltd. | Battery system, method of controlling the same, and energy storage system including the battery system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518672A (en) * | 2014-11-21 | 2015-04-15 | 深圳市航天新源科技有限公司 | Three-port converter with magnetic integration function and zero port current ripples |
| CN104518672B (en) * | 2014-11-21 | 2017-06-06 | 深圳市航天新源科技有限公司 | A kind of integrated three Port Translation devices with zero port current ripple of magnetic |
| CN105897032A (en) * | 2016-03-21 | 2016-08-24 | 江苏峰谷源储能技术研究院有限公司 | Auxiliary power supply of bidirectional energy storage inverter |
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Application publication date: 20140326 |