CN204316173U - A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter - Google Patents
A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter Download PDFInfo
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- CN204316173U CN204316173U CN201420749631.9U CN201420749631U CN204316173U CN 204316173 U CN204316173 U CN 204316173U CN 201420749631 U CN201420749631 U CN 201420749631U CN 204316173 U CN204316173 U CN 204316173U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
Abstract
The utility model relates to a kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter, its technical characterstic is: between mains supply and main power source export, connect main power source mains-supplied circuit, main power source grid power supply circuit is connected between electric network source and main power source export, main power source mains-supplied circuit comprises voltage detecting circuit, the first rectification circuit and the first direct voltage support circuit, and input and the voltage detecting circuit of the first rectification circuit are connected with mains supply; Main power source grid power supply circuit comprises the isolating switch, the first isolating transformer and the second rectification circuit that connect successively; Voltage detecting circuit is connected with isolating switch, and when detecting that mains supply has electricity, controlling isolating switch and disconnecting, when mains supply is without electricity, isolating switch closes.The utility model achieves the redundant power supply function of inverter main power source; Ensure that the reliability of photovoltaic inverter control system Power supply, improve power supply reliability and economic benefit, reduce cost.
Description
Technical field
The utility model belongs to photovoltaic inverter grid-connected technical field of power generation, especially a kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter.
Background technology
The cost of photovoltaic generation constantly reduces, and the effect of photovoltaic DC-to-AC converter in photovoltaic system holds the balance, and it also needs the reliability improving inverter while reducing costs.Wherein, the reliability of photovoltaic DC-to-AC converter power supply is one of key of photovoltaic DC-to-AC converter: power supply not only will meet power reguirements in the normal situation of electrical network, and will meet power reguirements when electric network fault.
The angle of economic benefit, power supply except keeping the cost advantage of self, also should should find new method in the overall efficiency improving inverter.Traditional dual power supply is mainly realized by following two kinds of modes: one is the mode adopting AC power taking and UPS mutually to switch; Another kind is the mode that AC power taking and DC side power taking combine.First kind of way cost is higher, and economic benefit is low; When the second way works under SVG pattern at night, actual just single power supply, reliability is lower.Therefore, find and a kind ofly can take into account power supply that economic benefit can take into account again inverter reliability and become the target that current photovoltaic DC-to-AC converter industry pursues.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of duplicate supply input redundancy electric power supply system of reasonable in design, Novel photovoltaic inverter that reliability is high and with low cost.
The utility model solves existing technical problem and takes following technical scheme to realize:
A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter, comprise mains supply, electric network source and main power source export, main power source mains-supplied circuit is connected with between mains supply and main power source export, main power source grid power supply circuit is connected with between electric network source and main power source export, described main power source mains-supplied circuit comprises voltage detecting circuit, first rectification circuit and the first direct voltage support circuit, input and the voltage detecting circuit of the first rectification circuit are connected with mains supply, the output of the first rectification circuit is connected to main power source by the first direct voltage support circuit and exports, described main power source grid power supply circuit comprises the isolating switch, the first isolating transformer, the second rectification circuit that connect successively, electric network source is connected with the input of isolating switch, and the output of the second rectification circuit is connected to main power source by the first direct voltage support circuit and exports, described voltage detecting circuit is connected with the input of the first rectification circuit, and when detecting that mains supply has electricity, controlling isolating switch and disconnecting, when mains supply is without electricity, isolating switch closes.
And, described electric network source also connects an auxiliary power-supplying circuit, this auxiliary power-supplying circuit comprises the second isolating transformer, the 3rd rectification circuit and the second direct voltage support circuit, B, C phase of electric network source is connected with the input of the second isolating transformer, the output of the second isolating transformer is connected with the interchange input of the 3rd rectification circuit, the direct current of the 3rd rectification circuit exports and is connected with the second direct voltage support circuit, and the second direct voltage support circuit provides power supply by after direct current filtering for auxiliary power supply exports; The positive pole of the 3rd rectification circuit output end is also connected with the anode of a diode, and the negative electrode of this diode is connected with the positive pole of the first rectification circuit, the second rectification circuit common output end.
And, the energy-storage travelling wave tube that the first described direct voltage support circuit and the second direct voltage support circuit adopt.
And the main power source grid power supply circuit that described electric network source connects and auxiliary power-supplying circuit are three-phase circuit or single phase circuit, or two-way three-phase circuit or two-way single phase circuit, or a road three-phase circuit and a road single phase circuit.
And described mains supply is 220V AC power, described electric network source is the grid power source of photo-voltaic power generation station.
Advantage of the present utility model and good effect are:
1, native system provides main power source and auxiliary power supply for photovoltaic DC-to-AC converter, wherein, main power source has the input of two-way power supply to guarantee its normal power supply, as long as and any road input has electricity, main power source just can export by normal power supply, thus achieves the redundant power supply of inverter main power source; Auxiliary power supply only exports when three-phase ac power supply has electricity; The electric energy that main power source preferentially uses mains supply to provide, when mains supply dead electricity, electric power system can automatically switch to electric network source and power, when electric network fault, electric power system also normally can provide power supply for inverter, thus ensure that the reliability of photovoltaic inverter control system Power supply.
2, the utility model is reasonable in design, reaches and can take into account the target that economic benefit can take into account again inverter reliability, realize the function of low voltage crossing, improve power supply reliability and economic benefit, reduce cost.
Accompanying drawing explanation
Fig. 1 is system connection diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described.
A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter, as shown in Figure 1, comprise mains supply, electric network source, main power source output, the output of auxiliary power supply, main power source mains-supplied circuit, main power source grid power supply circuit and auxiliary power-supplying circuit, main power source mains-supplied circuit and main power source grid power supply circuit are connected between mains supply and main power source output and provide power supply for main power source exports, and auxiliary power-supplying circuit is connected between electric network source and the output of auxiliary power supply and provides power supply for auxiliary power supply exports; Auxiliary power-supplying circuit is linked together by diode and main power source mains-supplied circuit and main power source grid power supply circuit; Converter main circuit is directly connected with electric network source.Below each several part circuit in system is described respectively:
Input side two power supplies of this redundancy electric power supply system: one is mains supply (being generally the 220V power supply at common family), another is electric network source (grid power source of photo-voltaic power generation station, is generally the electric pressures such as 270V, 315V or 380V).Outlet side provides two-way out-put supply for inverter: a road is the main power source of powering to inverter control system, and another road is the auxiliary power supply of powering to inverter auxiliary system, as the power supply etc. of contactor.Main power source is powered and to be provided by mains supply and electric network source, provides control power supply as long as any one power supply in mains supply and electric network source has electricity namely to can be inverter, when these two power supplys have electricity, preferentially uses mains supply; When the arbitrary power supply in these two power supplys loses power supply capacity, by controlling the break-make of isolating switch, can be implemented between these two power supplies and switching power supply source, ensureing that main power source normally exports, realize the redundant power supply of inverter control power supply.The power supply of auxiliary power supply is provided by electric network source, and when electric network source has electricity, can guarantee that the power supply of auxiliary power supply exports, auxiliary power supply only needs to work when electric network source has electricity, and when electric network source does not have electricity, auxiliary power supply also no longer works.When only there being electric network source to power, auxiliary power supply needs for main power source provides the power supply that initially powers on, and after ensureing that control circuit that main power source is powered powers on, the isolating switch controlling main power source power supply circuits closes, and guarantees the normal power supply of main power source.
Main power source mains-supplied circuit comprises voltage detecting circuit, the first rectification circuit, the first direct voltage support circuit.Mains supply is connected with the input of the first rectification circuit, for being direct current by AC conversion; Voltage detecting circuit is connected with the input of the first rectification circuit, for detecting mains input voltage value, the output cathode of the first rectification circuit is connected with the positive pole of the first direct voltage support circuit, the output negative pole of the first rectification circuit is connected with the negative pole of the first direct voltage support circuit, and the first direct voltage support circuit provides power supply by after direct current filtering for main power source exports.
The operation principle of main power source mains-supplied circuit is: after mains supply input, and whether voltage detecting circuit detects mains supply normal, will switch to electric network source power if abnormal.First rectification circuit is generally single-phase uncontrollable rectifier bridge, for ac commercial power voltage is converted into direct voltage.The direct voltage that first direct voltage support circuit is used for the first rectification circuit exports carries out filtering, stablize the output of this direct voltage, and store this DC energy, when grid collapses (i.e. low voltage crossing), for inverter control circuit provides power supply.
Main power source grid power supply circuit comprises isolating switch, the first isolating transformer, the second rectification circuit, the first direct voltage support circuit.Electric network source is connected with the input of isolating switch, isolating switch is for controlling the break-make of this branch road, the output of isolating switch is connected with the input of the first isolating transformer, and the first isolating transformer is used for line voltage being transformed to the alternating voltage matched with output dc voltage.The output of the first isolating transformer is connected with the input of the second rectification circuit, and the output AC voltage of isolating transformer is converted into direct voltage by the second rectification circuit.The output cathode of the second rectification circuit is connected with the positive pole of the first direct voltage support circuit, the output negative pole of the second rectification circuit is connected with the negative pole of the first direct voltage support circuit, and the first direct voltage support circuit provides power supply by after direct current filtering for main power source exports.
The operation principle of main power source grid power supply circuit is: after electric network source input, isolating switch controls the break-make of this power supply branch road, and when the voltage detecting circuit in mains circuit detects that mains supply has an electricity, isolating switch disconnects; When electricity power supply is without electricity, isolating switch closes.By controlling the break-make of isolating switch, ensure that mains supply and electric network source can be taken turns and being changed to main power source and powering, realizing the redundant power supply of inverter control circuit main power source.
Auxiliary power-supplying circuit comprises the second isolating transformer, the 3rd rectification circuit, the second direct voltage support circuit.B, C phase of electric network source is connected with the input of the second isolating transformer, the second isolating transformer be used for line voltage to be converted into auxiliary supply voltage value equal with secondary line voltage peak corresponding to voltage.The output of the second isolating transformer is connected with the interchange input of the 3rd rectification circuit, and the 3rd rectification circuit makes interchange input be converted into direct current output.The direct current of the 3rd rectification circuit exports and is connected with the second direct voltage support circuit, and direct voltage support circuit provides power supply by after direct current filtering for auxiliary power supply exports.
Be connected by a diode between the positive pole that the positive pole that auxiliary power-supplying circuit exports and main power source power supply circuits (main power source mains-supplied circuit, main power source grid power supply circuit) export, the positive pole that diode anode exports with auxiliary Power supply is connected, and diode cathode and the main power source positive pole exported of powering is connected.The negative pole that auxiliary power-supplying circuit exports is connected with the negative pole that main power source power supply circuits export.When only there being electric network source to power, main power source can first obtain controlling electricity by this diode, and the isolating switch controlled in main power source power supply circuits closes, and makes main power source power supply circuits normal power supply.
The main power source grid power supply circuit be connected with electric network source and auxiliary power-supplying circuit, and be not only confined to three-phase circuit or single phase circuit can also be two-way three-phase circuit or two-way single phase circuit, or a road three-phase circuit and a road single phase circuit.
Two direct voltage support circuits that main power source is connected with auxiliary power supply outlet side use energy-storage travelling wave tube, such as capacitor.According to the power consumption condition of different control system, the capacitance of needs can be revised accordingly.The effect of two direct voltage support circuits is, when the grid collapses (i.e. low voltage crossing moment), electric power system loses power supply, the power supply of control system is provided by the energy-storage travelling wave tube of two DC support circuit, at electric network source fault moment, first direct voltage support circuit, the second direct voltage support circuit can provide power supply for main power source and auxiliary power supply, ensure that the control power supply of inverter can normally work, enable inverter pass through the electric network fault moment.
It is emphasized that; embodiment described in the utility model is illustrative; instead of it is determinate; therefore the utility model comprises the embodiment be not limited to described in embodiment; every other execution modes drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope of the utility model protection equally.
Claims (5)
1. the duplicate supply input redundancy electric power supply system of a Novel photovoltaic inverter, comprise mains supply, electric network source and main power source export, it is characterized in that: between mains supply and main power source export, be connected with main power source mains-supplied circuit, main power source grid power supply circuit is connected with between electric network source and main power source export, described main power source mains-supplied circuit comprises voltage detecting circuit, first rectification circuit and the first direct voltage support circuit, input and the voltage detecting circuit of the first rectification circuit are connected with mains supply, the output of the first rectification circuit is connected to main power source by the first direct voltage support circuit and exports, described main power source grid power supply circuit comprises the isolating switch, the first isolating transformer, the second rectification circuit that connect successively, electric network source is connected with the input of isolating switch, and the output of the second rectification circuit is connected to main power source by the first direct voltage support circuit and exports, described voltage detecting circuit is connected with the input of the first rectification circuit, and when detecting that mains supply has electricity, controlling isolating switch and disconnecting, when mains supply is without electricity, isolating switch closes.
2. the duplicate supply input redundancy electric power supply system of a kind of Novel photovoltaic inverter according to claim 1, it is characterized in that: described electric network source also connects an auxiliary power-supplying circuit, this auxiliary power-supplying circuit comprises the second isolating transformer, 3rd rectification circuit and the second direct voltage support circuit, the B of electric network source, C phase is connected with the input of the second isolating transformer, the output of the second isolating transformer is connected with the interchange input of the 3rd rectification circuit, the direct current of the 3rd rectification circuit exports and is connected with the second direct voltage support circuit, second direct voltage support circuit provides power supply by after direct current filtering for auxiliary power supply exports, the positive pole of the 3rd rectification circuit output end is also connected with the anode of a diode, and the negative electrode of this diode is connected with the positive pole of the first rectification circuit, the second rectification circuit common output end.
3. the duplicate supply input redundancy electric power supply system of a kind of Novel photovoltaic inverter according to claim 2, is characterized in that: the first described direct voltage support circuit and the second direct voltage support circuit adopt energy-storage travelling wave tube.
4. the duplicate supply input redundancy electric power supply system of a kind of Novel photovoltaic inverter according to claim 2, it is characterized in that: the main power source grid power supply circuit that described electric network source connects and auxiliary power-supplying circuit are three-phase circuit or single phase circuit, or two-way three-phase circuit or two-way single phase circuit, or a road three-phase circuit and a road single phase circuit.
5. the duplicate supply input redundancy electric power supply system of a kind of Novel photovoltaic inverter according to any one of Claims 1-4, it is characterized in that: described mains supply is 220V AC power, described electric network source is the grid power source of photo-voltaic power generation station.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420749631.9U CN204316173U (en) | 2014-12-03 | 2014-12-03 | A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420749631.9U CN204316173U (en) | 2014-12-03 | 2014-12-03 | A kind of duplicate supply input redundancy electric power supply system of Novel photovoltaic inverter |
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| CN204316173U true CN204316173U (en) | 2015-05-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797859A (en) * | 2018-08-03 | 2020-02-14 | 西门子股份公司 | Redundant power supply network and ship with redundant power supply network as on-board power supply network |
| CN111969716A (en) * | 2020-08-17 | 2020-11-20 | 博阳能源科技有限公司 | Multi-power supply complementary power supply device and control method thereof |
| CN112737091A (en) * | 2020-12-30 | 2021-04-30 | 大禹电气科技股份有限公司 | High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter |
-
2014
- 2014-12-03 CN CN201420749631.9U patent/CN204316173U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797859A (en) * | 2018-08-03 | 2020-02-14 | 西门子股份公司 | Redundant power supply network and ship with redundant power supply network as on-board power supply network |
| CN110797859B (en) * | 2018-08-03 | 2023-05-26 | 西门子股份公司 | Redundant power supply network, method for connecting same to an external power supply network, and ship having a redundant power supply network |
| CN111969716A (en) * | 2020-08-17 | 2020-11-20 | 博阳能源科技有限公司 | Multi-power supply complementary power supply device and control method thereof |
| CN112737091A (en) * | 2020-12-30 | 2021-04-30 | 大禹电气科技股份有限公司 | High-voltage frequency converter and uninterrupted power supply system of high-voltage frequency converter |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20211203 |