CN205583708U - Be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery - Google Patents
Be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery Download PDFInfo
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- CN205583708U CN205583708U CN201521094131.7U CN201521094131U CN205583708U CN 205583708 U CN205583708 U CN 205583708U CN 201521094131 U CN201521094131 U CN 201521094131U CN 205583708 U CN205583708 U CN 205583708U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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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 be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery, the system includes a plurality of distributed photovoltaic panel and a plurality of energy storage unit, the dc bus is incorporated into respectively to distributing type photovoltaic panel and energy storage unit behind the DCDC circuit on, the dc bus inserts ac bus behind the DCAC circuit, be in when being incorporated into the power networks the mode when the system, adopt two closed -loop control structures that power outer loop and current loop combined together, lose when being in from the wire mould formula under the electric circumstances at the electric wire netting when the system, take to decide voltage and decide the frequency control tactics, can realize independent power supply, for load provide voltage and frequency support. The utility model relates to a be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery, control is nimble, stability and reliability are high, can realize that output is controllable in real time, frequency control response time when reducing the multiple input photovoltaic and jointly exerting oneself with a wide range of energy storage.
Description
Technical field
This utility model relates to a kind of integrated electric power system, particularly relates to a kind of system utilizing common DC bus mode to carry out concentration supply power, management multiple distributed photovoltaics and energy storage device, belongs to electric and electronic technical field.
Background technology
In recent years, along with country has formulated the incentive policy of a large amount of new forms of energy development, domestic generation of electricity by new energy was able to fast development；Meanwhile, along with the most in short supply of land resource from now on and rise in price, the development of domestic photovoltaic generation will be to make full use of idle roof and dispersion soil distribution of resource formula photovoltaic generation.But, fast development along with distributed photovoltaic, high permeability distributed photovoltaic is directly accessed serves problem by controlling band to the voltage stabilization of power distribution network, the quality of power supply and operation, utilizing energy-storage system can effectively solve this series of problems, therefore distributed photovoltaic and energy storage connected applications are a kind of trend and solution.
At present, energy storage and the integrated application model of photovoltaic mainly use common ac bus mode, each road photovoltaic and energy storage directly and electrical network coupling, and the coordination between multiple exchange grid-connecting apparatus controls more complicated, relatively costly, are appropriate only for the application of large-scale grid-connected photovoltaic power station.Additionally, photovoltaic directly exchanges the mode collected with energy storage there is the problem that capacity of resisting disturbance is not enough, the electrical network quality of power supply is also had and has a certain impact by electricity generation grid-connecting.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, it is provided that a kind of control flexibly, stability and the high common DC bus type integrated electric power system of distributed photovoltaic energy storage of reliability.This utility model electric power system can be in the double mode lower operation of grid-connected/off-network, its MPPT being possible not only to realize photovoltaic controls, may also adapt to different types of energy storage, give full play to the range of accommodation of energy storage, optimize the charge and discharge control of energy storage, put forward high-octane utilization rate, it is achieved output is the most controlled, reduce multi input photovoltaic and combine power adjustments response time when exerting oneself with polymorphic type energy storage.
The purpose of this utility model is achieved in that
A kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage, described system includes multiple distributed photovoltaic electroplax and multiple energy-storage units, described distributed photovoltaic electroplax and energy-storage units are incorporated on dc bus respectively after DC/DC circuit, and described dc bus accesses ac bus after DC/AC circuit.
This utility model one common DC bus type integrated electric power system of distributed photovoltaic energy storage, described DC/DC circuit includes two IGBT device and a filter inductance, connect between described distributed photovoltaic electroplax or the both positive and negative polarity of energy-storage units and have input capacitance, and the filtered inductance in one end of the both positive and negative polarity of described distributed photovoltaic electroplax or energy-storage units accesses emitter stage and the colelctor electrode of the second IGBT device of the first IGBT device, the colelctor electrode of described first IGBT device and the emitter stage of the second IGBT device are respectively connecting on the both positive and negative polarity of dc bus.
This utility model one common DC bus type integrated electric power system of distributed photovoltaic energy storage, described DC/AC is IGBT inverter, it is provided with filter capacitor between the both positive and negative polarity of dc bus, the both positive and negative polarity of described dc bus accesses the input of IGBT inverter, and the outfan of described IGBT inverter is connected on ac bus after the LC filter circuit via inductance and electric capacity composition.
This utility model one common DC bus type integrated electric power system of distributed photovoltaic energy storage, described energy-storage units is one or more in lead-acid battery, lithium battery or super capacitor.
Compared with prior art, the beneficial effects of the utility model are:
This utility model innovatively devises common DC bus type multi input converting means topological structure, it is achieved photovoltaic and energy storage integrated access in dc bus, improve system operation reliability；For distributed photovoltaic exchange with energy-storage system capacity of resisting disturbance that the mode collected exists not enough with affect the problems such as the quality of power supply, use the mode that distributed photovoltaic collects at DC side with energy storage, the undulatory property of distributed photovoltaic can be stabilized by energy storage at DC side, within stability bandwidth is limited in 5%, decrease the grid-connected impact on the electrical network quality of power supply of distributed power generation.Realize output the most controlled, reduce multi input photovoltaic and combine power adjustments response time when exerting oneself with polymorphic type energy storage.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of this utility model a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage.
Fig. 2 is the circuit diagram of this utility model a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage.
Fig. 3 is the electric voltage frequency control block diagram of this utility model a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage.
Detailed description of the invention
See Fig. 1 and Fig. 2, a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage that this utility model relates to, described system includes multiple distributed photovoltaic electroplax and multiple energy-storage units, described distributed photovoltaic electroplax and energy-storage units are incorporated on dc bus respectively after DC/DC circuit, and described dc bus accesses ac bus after DC/AC circuit；
Concretely, described DC/DC circuit includes two IGBT device and a filter inductance, connect between described distributed photovoltaic electroplax or the both positive and negative polarity of energy-storage units and have input capacitance, and the filtered inductance in one end of the both positive and negative polarity of described distributed photovoltaic electroplax or energy-storage units accesses emitter stage and the colelctor electrode of the second IGBT device of the first IGBT device, the colelctor electrode of described first IGBT device and the emitter stage of the second IGBT device are respectively connecting on the both positive and negative polarity of dc bus；
Described DC/AC is IGBT inverter, it is provided with filter capacitor between the both positive and negative polarity of dc bus, the both positive and negative polarity of described dc bus accesses the input of IGBT inverter, the outfan of described IGBT inverter is connected on ac bus after the LC filter circuit via inductance and electric capacity composition, and described ac bus is connected to electrical network；
Concretely, described energy-storage units is lead-acid battery, lithium battery, super capacitor etc.；
The control method of a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage is:
When system is in grid-connect mode, carry out active reactive control strategy, use the double-closed-loop control structure that power outer shroud combines with current inner loop；In the case of grid-connected, system output power is controlled, efficiently solves trend, voltage stabilization sex chromosome mosaicism that distributed photovoltaic undulatory property causes, it is achieved Thief zone distributed photovoltaic close friend accesses electrical network.
Such as Fig. 3, when system is in off-network pattern, i.e. in the case of electrical breakdown, take determine voltage and determine FREQUENCY CONTROL strategy, it is achieved independently-powered, provide voltage and frequency to support for load；Now, three-phase voltage Uabc and real-time frequency F is obtained by sample circuit, three-phase voltage Uabc obtains Us after 3/2 conversion, Uref is command voltage, Us, Uref are through pi regulator output amplitude amount, and Fref is instruction frequency, and Fref, F export phase mass through PI actuator, amplitude amount, phase mass obtain driving signal by Realization of pulse width modulation based on voltage space vector (SVPWM), and this driving signal controls IGBT switch motion in DC/AC circuit；Thus realize determining voltage and determining FREQUENCY CONTROL strategy, it is achieved that independently-powered.
Additionally: it should be noted that above-mentioned detailed description of the invention is only a prioritization scheme of this patent, any change that those skilled in the art is done according to above-mentioned design or improvement, all within the protection domain of this patent.
Claims (3)
1. the common DC bus type integrated electric power system of distributed photovoltaic energy storage, it is characterized in that: described system includes multiple distributed photovoltaic electroplax and multiple energy-storage units, described distributed photovoltaic electroplax and energy-storage units are incorporated on dc bus respectively after DC/DC circuit, and described dc bus accesses ac bus after DC/AC circuit；
Described DC/DC circuit includes two IGBT device and a filter inductance, connect between described distributed photovoltaic electroplax or the both positive and negative polarity of energy-storage units and have input capacitance, and the filtered inductance in one end of the both positive and negative polarity of described distributed photovoltaic electroplax or energy-storage units accesses emitter stage and the colelctor electrode of the second IGBT device of the first IGBT device, the colelctor electrode of described first IGBT device and the emitter stage of the second IGBT device are respectively connecting on the both positive and negative polarity of dc bus.
2. a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage, it is characterized in that: described DC/AC is IGBT inverter, it is provided with filter capacitor between the both positive and negative polarity of dc bus, the both positive and negative polarity of described dc bus accesses the input of IGBT inverter, and the outfan of described IGBT inverter is connected on ac bus after the LC filter circuit via inductance and electric capacity composition.
3. a kind of common DC bus type integrated electric power system of distributed photovoltaic energy storage, it is characterised in that: described energy-storage units is one or more in lead-acid battery, lithium battery or super capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521094131.7U CN205583708U (en) | 2015-12-26 | 2015-12-26 | Be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery |
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| CN201521094131.7U CN205583708U (en) | 2015-12-26 | 2015-12-26 | Be total to integrated power supply system of dc bus type distributing type photovoltaic energy storage battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406512A (en) * | 2015-12-26 | 2016-03-16 | 江苏方程电力科技有限公司 | Common direct current bus type distributed photovoltaic energy storage integration power supply system and control method therefor |
| CN108347063A (en) * | 2018-01-17 | 2018-07-31 | 武汉理工大学 | A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage |
| CN109378848A (en) * | 2018-12-27 | 2019-02-22 | 西安交通大学 | The Optimal Configuration Method of multiple types battery energy storage system |
-
2015
- 2015-12-26 CN CN201521094131.7U patent/CN205583708U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406512A (en) * | 2015-12-26 | 2016-03-16 | 江苏方程电力科技有限公司 | Common direct current bus type distributed photovoltaic energy storage integration power supply system and control method therefor |
| CN108347063A (en) * | 2018-01-17 | 2018-07-31 | 武汉理工大学 | A kind of ship grid-connected photovoltaic system based on super capacitor energy-storage |
| CN108347063B (en) * | 2018-01-17 | 2021-08-24 | 武汉理工大学 | Ship photovoltaic grid-connected power generation system based on super capacitor energy storage |
| CN109378848A (en) * | 2018-12-27 | 2019-02-22 | 西安交通大学 | The Optimal Configuration Method of multiple types battery energy storage system |
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