CN104467628A - Energy storage type photovoltaic power generating system - Google Patents
Energy storage type photovoltaic power generating system Download PDFInfo
- Publication number
- CN104467628A CN104467628A CN201410645464.8A CN201410645464A CN104467628A CN 104467628 A CN104467628 A CN 104467628A CN 201410645464 A CN201410645464 A CN 201410645464A CN 104467628 A CN104467628 A CN 104467628A
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- China
- Prior art keywords
- photovoltaic
- generating system
- energy storage
- power
- photovoltaic power
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- 238000004146 energy storage Methods 0.000 title claims abstract description 11
- 238000009825 accumulation Methods 0.000 claims description 9
- 239000002253 acid Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007726 management method Methods 0.000 claims description 3
- 238000010223 real-time analysis Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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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
-
- 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
Abstract
The invention relates to an energy storage type photovoltaic power generating system. The energy storage type photovoltaic power generating system is composed a photovoltaic power generating system body, a battery energy storage system, a data collecting system and a control system. A storage battery energy storage unit serves as an energy buffering device of the photovoltaic power generating system body, and generating power output is effectively controlled. The power supply mode of the system is managed and set according to the system generating capacity and the power grid power demand, the running efficiency and reliability of the system are improved, and the positive role of a distributed energy source in a power grid is brought into full play.
Description
Technical field
The present invention relates to a kind of photovoltaic generating system, particularly relate to a kind of accumulation energy type photovoltaic generating system.
Background technology
The renewable energy power generation such as solar power generation, wind power generation, tidal power, for solving energy crisis and the problem of environmental pollution of human society growing tension, provides an alternative resolving ideas and way.Ether energy photovoltaic generation is example, along with the expanding day of the scale of whole world installation in recent years, is just becoming the important technical of renewable energy utilization.
Solar energy power generating simply can be divided into two kinds of modes, a kind of is centralized solar photovoltaic power plant, by building the large solar photovoltaic power station of tens megawatts and even the hundreds of mw scale concentrated in flakes, convert solar energy acquisition to electric energy, through conveying and the allotment of bulk power grid, be supplied to user and use.Centralized solar photovoltaic power plant, because solar power generation has intermittence and instable feature, often causes great impact to electrical network, causes adverse effect to the safety of electrical network; And centralized production of energy method, still do not break away from the production and application pattern of traditional electric energy, cause a large amount of valuable electric energy to produce a large amount of irreversible loss in the course of conveying of multistage conversion and long distance.Also have one to be distributed solar photovoltaic power plant, scale several megawatt and even several kilowatts not etc., generally to be built on building roof or the ground etc. near user.Distributed solar photovoltaic power plant, near user side, do not need High Pressure Difference to change and conveying, the middle loss of process decreases, and the utilization ratio of new forms of energy is improved.But, remain gap due to solar power generation with instability, may adverse effect be caused to the quality of power supply of user; And namely send out i.e. use, can not demand response; When under generation grid fault conditions, distributed solar photovoltaic power plant also must be out of service, can not reach from the autonomous target of net.
Existing distributed solar energy photovoltaic generating system, system output power is subject to the impact of external environment condition as weather, is day and night interrupted and poor stability.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of accumulation energy type photovoltaic generating system, improve operational efficiency and the stability of photovoltaic generating system.
In order to achieve the above object, the present invention by the following technical solutions: accumulation energy type photovoltaic generating system, is made up of photovoltaic generating system, battery energy storage system, data acquisition system and control system;
Described photovoltaic generating system is unified DC power converter by two photovoltaic cells and is formed; Described two photovoltaic cells freely can form string and/parallel photovoltaic battery pack; Described direct current stream power inverter has been used for intelligent accummulator charging and photovoltaic cell group maximum power output controlling functions;
Described battery energy storage system is made up of a lead acid accumulator and a charging-discharging controller; Described lead acid accumulator is used for, for being recognize to provide reserve capacity, maintaining system stability and exporting; Described charging-discharging controller is formed by Boost circuit and the inverse parallel of Buck circuit, for lead acid accumulator discharge and recharge optimal control and maintenance DC node voltage stabilization, has voltage clamp effect to photovoltaic system;
Described data acquisition system gathers photovoltaic cell output voltage electric current, storage battery output voltage electric current, DC node voltage and system output power signal, for the real-time analysis process of control system provides Data Source for detecting;
Every operational factor that described control system provides according to data acquisition system and relevant control requires and scheduling requirement, realizes the energy management to system and control.
Further, described Boost circuit is coupling inductance crisscross parallel Boost translation circuit.
Coupling inductance crisscross parallel Boost translation circuit utilizes coupling inductance principle to be coupled by the inductance in circuit common, and problem is recovered in the direction that the leakage inductance of its coupling can solve existing for output diode; Compare traditional B oost circuit, its input current ripple reduces, and switching loss and conduction loss reduce, and the efficiency of converter is further enhanced.
Compared with prior art, accumulation energy type photovoltaic generating system of the present invention has the following advantages: the present invention adopts batteries to store energy unit as the energy buffer device of photovoltaic generating system, effectively controls generated output and exports; According to systems generate electricity amount and electrical network need for electricity characteristic, manage the powering mode of the system of setting, improve operational efficiency and the reliability of system, give full play to the positive role of distributed energy in electrical network.
Accompanying drawing explanation
Fig. 1 is the composition structure chart of accumulation energy type photovoltaic generating system of the present invention;
Fig. 2 is the schematic diagram of Boost circuit of the present invention.
Embodiment
Below by embodiment, the invention will be further described by reference to the accompanying drawings.
As shown in Figure 1, accumulation energy type photovoltaic generating system of the present invention, is made up of photovoltaic generating system, battery energy storage system, data acquisition system and control system;
Described photovoltaic generating system is unified DC power converter by two photovoltaic cells and is formed; Described two photovoltaic cells freely can form string and/parallel photovoltaic battery pack; Described direct current stream power inverter has been used for intelligent accummulator charging and photovoltaic cell group maximum power output controlling functions;
Described battery energy storage system is made up of a lead acid accumulator and a charging-discharging controller; Described lead acid accumulator is used for, for being recognize to provide reserve capacity, maintaining system stability and exporting; Described charging-discharging controller is formed by Boost circuit and the inverse parallel of Buck circuit, for lead acid accumulator discharge and recharge optimal control and maintenance DC node voltage stabilization, has voltage clamp effect to photovoltaic system;
Described data acquisition system gathers photovoltaic cell output voltage electric current, storage battery output voltage electric current, DC node voltage and system output power signal, for the real-time analysis process of control system provides Data Source for detecting;
Every operational factor that described control system provides according to data acquisition system and relevant control requires and scheduling requirement, realizes the energy management to system and control.
As described in Figure 2, described Boost circuit is coupling inductance crisscross parallel Boost translation circuit, coupling inductance crisscross parallel Boost translation circuit utilizes coupling inductance principle to be coupled by the inductance in circuit common, problem is recovered in the direction that the leakage inductance of its coupling can solve existing for output diode: traditional B oost circuit of comparing, its input current ripple reduces, switching loss and conduction loss reduce, and the efficiency of converter is further enhanced.
The present invention adopts batteries to store energy unit as the energy buffer device of photovoltaic generating system, effectively controls generated output and exports; According to systems generate electricity amount and electrical network need for electricity characteristic, manage the powering mode of the system of setting, improve operational efficiency and the reliability of system, give full play to the positive role of distributed energy in electrical network.
The above is only preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvement and modification, these improve and modify and also should be considered as protection scope of the present invention.
Claims (2)
1. accumulation energy type photovoltaic generating system, is characterized in that, is made up of photovoltaic generating system, battery energy storage system, data acquisition system and control system;
Described photovoltaic generating system is unified DC power converter by two photovoltaic cells and is formed; Described two photovoltaic cells freely can form string and/parallel photovoltaic battery pack; Described direct current stream power inverter has been used for intelligent accummulator charging and photovoltaic cell group maximum power output controlling functions;
Described battery energy storage system is made up of a lead acid accumulator and a charging-discharging controller; Described lead acid accumulator is used for, for being recognize to provide reserve capacity, maintaining system stability and exporting; Described charging-discharging controller is formed by Boost circuit and the inverse parallel of Buck circuit, for lead acid accumulator discharge and recharge optimal control and maintenance DC node voltage stabilization, has voltage clamp effect to photovoltaic system;
Described data acquisition system gathers photovoltaic cell output voltage electric current, storage battery output voltage electric current, DC node voltage and system output power signal, for the real-time analysis process of control system provides Data Source for detecting;
Every operational factor that described control system provides according to data acquisition system and relevant control requires and scheduling requirement, realizes the energy management to system and control.
2. accumulation energy type photovoltaic generating system according to claim 1, is characterized in that, described Boost circuit is coupling inductance crisscross parallel Boost translation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645464.8A CN104467628A (en) | 2014-11-14 | 2014-11-14 | Energy storage type photovoltaic power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645464.8A CN104467628A (en) | 2014-11-14 | 2014-11-14 | Energy storage type photovoltaic power generating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104467628A true CN104467628A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410645464.8A Pending CN104467628A (en) | 2014-11-14 | 2014-11-14 | Energy storage type photovoltaic power generating system |
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| Country | Link |
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| CN (1) | CN104467628A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106708163A (en) * | 2017-03-14 | 2017-05-24 | 华北电力大学（保定） | Photovoltaic power generation system control method for tracking through maximum power point spinning reserve capacity |
| CN106936300A (en) * | 2017-03-29 | 2017-07-07 | 中国矿业大学 | A kind of efficient high-gain DC_DC converters of low input current ripple of non-isolation type |
-
2014
- 2014-11-14 CN CN201410645464.8A patent/CN104467628A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106708163A (en) * | 2017-03-14 | 2017-05-24 | 华北电力大学（保定） | Photovoltaic power generation system control method for tracking through maximum power point spinning reserve capacity |
| CN106708163B (en) * | 2017-03-14 | 2018-07-27 | 华北电力大学（保定） | The photovoltaic generating system control method tracked with maximum power point spinning reserve capacity |
| CN106936300A (en) * | 2017-03-29 | 2017-07-07 | 中国矿业大学 | A kind of efficient high-gain DC_DC converters of low input current ripple of non-isolation type |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150325 |
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| WD01 | Invention patent application deemed withdrawn after publication |