CN104980090A - Wind-photovoltaic complementary power generation device with hybrid energy storage system - Google Patents
Wind-photovoltaic complementary power generation device with hybrid energy storage system Download PDFInfo
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- CN104980090A CN104980090A CN201410223134.XA CN201410223134A CN104980090A CN 104980090 A CN104980090 A CN 104980090A CN 201410223134 A CN201410223134 A CN 201410223134A CN 104980090 A CN104980090 A CN 104980090A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 69
- 238000010248 power generation Methods 0.000 title claims abstract description 13
- 230000000295 complement effect Effects 0.000 title claims abstract description 8
- 230000008901 benefit Effects 0.000 claims abstract description 7
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000011084 recovery Methods 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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- 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
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Photovoltaic Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Output power of wind power generation and photovoltaic power generation has volatility and randomness, the grid-connection technical requirements are high, the cost is high and the utilization rate is relatively low. According to the research, wind power generation and photovoltaic power generation both have certain complimentarity on time and space, so that development of a complementary hybrid wind/photovoltaic power generation system (HPW) becomes more and more important; the complementary hybrid wind/photovoltaic power generation system shares an energy storage device and a universal inverter, so that the use cost of a power generation system is reduced. A novel hybrid energy storage system is disclosed by utilizing complementarity, in energy storage principle, of superconducting magnetic energy storage (SMES) and a storage battery(BESS), so that the energy storage system has advantages such as high power density, high energy density, a long service life and the like, meanwhile, a self-adaptive fuzzy control algorithm is adopted to further control the on and off of the hybrid energy storage system, thereby realizing fast stabilizing of output power fluctuation of the wind-photovoltaic complementary power generation system, reducing times of charging and discharging the storage battery, prolonging the service life and further improving the economic performance and technical performance of the whole system.
Description
Technical field
The present invention's research, based on the wind and solar hybrid generating system of novel mixed energy storage system, is conducive to making full use of wind power generation and photovoltaic generation complementarity over time and space, thus utilizes new forms of energy power to greatest extent, increase economic efficiency; Utilize superconducting energy storage and storage battery to form novel mixed energy storage system, improve energy storage device power density, energy density and useful life, thus improve the utilance of whole device.
Background technology
Along with the fast development of economy, the Critical policies that reproducible new cleaning fuel has become every country development, to become the focus of world attention, is found by energy problem; Wind energy and solar energy, they have generality, the advantage such as pollution-free, renewable, have become the potential development trend of most in novel energy.Wind energy and solar energy have again good complementarity on time and space, and in time, usual daylight is stronger, and wind speed is very little, and illumination in evening is very weak, and wind energy increases relatively; Resource compensate for wind-powered electricity generation and the defect of photoelectricity autonomous system in resource; Spatially, the wind park of China and solar plant generally all build spacious place in, and wind energy and solar energy complementarity in time more can embody.The quality of voltage of the fluctuation of wind, solar energy and the intermittence electrical network that has been major effect; In order to change wind-powered electricity generation, solar energy intermittence and unsteadiness, need reserved enough large reserve capacity, to stabilize the fluctuation of honourable power output;
There are storage battery, super capacitor, superconducting energy storage etc. present stage with the energy-storage travelling wave tube being widely used in energy storage device.Affect by energy storage mechnism, storage battery energy density is high, but power density, service life cycle are low, and responsive to some charge and discharge process, and the adaptability of high-power discharge and recharge and frequent electric discharge is not high; Its power density of superconducting energy storage, cycle life are high, and efficiency for charge-discharge is high, but energy density is low, and more difficult to the voltage stabilizing of super capacitor group, often use in the system being used for high-power discharge and recharge and cycle charge-discharge.Superconducting energy storage is that longest-lived in the energy-storage travelling wave tube of at present application, response speed are the fastest, its energy storage efficiency is high, fast response time, can realize meritorious, reactive power compensation by four-quadrant, to improving the fail safe of electric power system and improving power supply quality and have good technical performance.But high cost and Large Copacity realize the large-scale application limiting it.The present invention proposes the topological structure of novel wind-solar hybrid device, wind-powered electricity generation and electro-optical system can be general at energy storage device and inversion link, so the cost of wind and solar hybrid generating system can reduce, adopt the mixed energy storage system that superconducting energy storage and storage battery combine, by under different operating states, different energy-storage travelling wave tubes is selected to carry out discharge and recharge, both the use cost of superconducting energy storage can have been reduced, also the discharge and recharge number of times of storage battery can be reduced, improve the useful life of storage battery, thus reach the useful life extending mixed energy storage system.
Summary of the invention
The present invention is mainly for the wind and solar hybrid generating system based on novel mixed energy storage system, adopt the novel mixed energy storage system that superconducting energy storage and storage battery form, use by inverter is in parallel with the wind and solar hybrid generating system that photovoltaic generating system and wind generator system form, meet the useful life extending storage battery, improve power density, the energy density of mixed energy storage system, thus stabilize the power fluctuation of wind-light complementary system to greatest extent;
Technical characteristic of the present invention is as follows:
(1) form wind and solar hybrid generating system by photovoltaic generating system and wind generator system, because two Blast Furnace Top Gas Recovery Turbine Unit (TRT) have complementarity in time and spatially, new forms of energy power can be obtained to greatest extent in each time period;
(2 utilize superconducting energy storage and storage battery to form novel mixed energy storage system, superconducting energy storage is by V/I power inverter, storage battery is by DC/DC converter, electrical network is connected into by two-way commutator after parallel connection, for stabilizing the power fluctuation of wind and solar hybrid generating system, thus make system output power mild;
(3) switch of Adaptive Fuzzy Control algorithm to mixed energy storage system is adopted to control, thus optionally select superconducting energy storage and batteries to store energy charge and discharge switch in mixed energy storage system, thus improve the useful life of storage battery and the energy density of superconducting energy storage;
Its beneficial effect is:
Primary study of the present invention, based on the wind and solar hybrid generating system of novel energy-storing system, provides the control program of novel mixed energy storage system:
(1) wind generator system and photovoltaic generating system parallel connection use by wind and solar hybrid generating system, have complementarity over time and space, thus utilize the power output of new forms of energy to greatest extent;
(2) superconducting energy storage and storage battery is utilized to form novel mixed energy storage system, utilize storage battery energy density high, the advantages such as the power density of superconducting energy storage is high, long service life, thus mixed energy storage system is reached power density is high, energy density is high, long service life, thus improve economic benefit and the Practical Benefit of system, stabilize the power fluctuation of wind and solar hybrid generating system to greatest extent.
Accompanying drawing explanation
Fig. 1 is main circuit topological structure that patent of the present invention adopts;
Fig. 2 is the control topology structure of mixed energy storage system of the present invention;
Fig. 3 is the control block diagram that patent of the present invention adopts.
Embodiment
Below with reference to figure and specific implementation process, patent of the present invention is described in further detail:
See Fig. 1, utilize wind generator system and photovoltaic generating system composition wind-light complementary system, utilize two electricity generation systems complementarity in time and spatially, wind generator system connects load and energy-storage system by transformer, photovoltaic generation, by DC/AC current transformer, is then connected into load and energy-storage system by inverter.When the power output of wind and solar hybrid generating system is greater than the power needed for load, remaining power inputs novel mixed energy storage system by bi-directional inverter, dump power is stored in energy-storage system; With should wind and solar hybrid generating system power output be less than the power needed for load time, utilize energy-storage system power output, thus stabilize the power fluctuation of wind and solar hybrid generating system;
See Fig. 2, the control topology structure of mixed energy storage system, by the control of opening the light to each, thus optionally to the charge and discharge control of storage battery and superconducting energy storage, thus reach the useful life of improving storage battery, improve the power density of whole energy-storage system, energy density and useful life.It is the equivalent voltage of batteries in figure; For the terminal voltage of batteries; For the busbar voltage of wind-light complementary system, for charging and discharging currents when charging (order); , be modulated current through two-way DC/DC converter and chopper; For terminal voltage; For charging current when charging (order); With the duty ratio for converter;
See Fig. 3, based on the wind and solar hybrid generating system control block diagram of mixed energy storage system, in comprise the Wave energy of each frequency, two-stage low pass filter is adopted to carry out filtering respectively, but because the power of super capacitor and storage battery has certain restriction, in order to avoid energy storage device punctures, therefore adopt amplitude limiter; For superconducting energy storage voltage measurements; For grid voltage reference value, determined by the charged state of superconducting magnetic energy storage.To the actual magnitude of the voltage at superconducting device two ends, will certain amplitude be limited in, and then compare with electric current and obtain feedback control amount, thus the instruction of express delivery follow current; For duty ratio, feedforward control amount, exempt voltage fluctuation impact that electric current is brought; By to the feedback in duty ratio, the controller that connection controls, thus regulate cut-offfing of chopper switches; Use identical control mode, storage battery is controlled;
The course of work of patent of the present invention:
Comprise the Wave energy of each frequency in wind and solar hybrid generating system, adopt two-stage low pass filter to carry out filtering respectively, but there is certain restriction due to the power of super capacitor and storage battery, in order to avoid energy storage device punctures, therefore employing amplitude limiter; By to superconducting energy storage voltage measurements, grid voltage reference value, determined by the charged state of superconducting magnetic energy storage.To the actual magnitude of the voltage at superconducting device two ends, by the feedback in duty ratio, the controller that connection controls, thus regulate cut-offfing of chopper switches; Use identical control mode, storage battery is controlled;
The specified scheme of patent of the present invention has been described in detail patent of the present invention; for a person skilled in the art, the various apparent change carried out it when not deviating from the spirit and scope of patent of the present invention is all within the protection range of patent of the present invention.
Claims (2)
1. the research of the wind light generation compensation device containing mixed energy storage system, it is characterized in that: utilize photovoltaic generation and wind power generation complementarity over time and space, propose wind power generation and photovoltaic generation composition compensating generator, namely can stabilize wind power generation and photovoltaic generation power to fluctuate large shortcoming, wind light generation compensation device will with a set of inverter circuit of use and energy storage device simultaneously, thus reduce cost, improve the economic benefit of package unit.
2. the research of the wind light generation compensation device containing mixed energy storage system according to claim 1, novel mixed energy storage system is characterized in that: superconducting energy storage and storage battery have certain complementarity on energy storage mechnism, superconducting energy storage power density is high, charge/discharge rates is fast, the features such as long service life, storage battery energy density is large, useful life is short, therefore energy-storage travelling wave tube superconducting energy storage and batteries to store energy are improved economic benefit and the useful life of energy-storage system as novel mixed energy storage system, complementary performance also can stabilize fluctuation and the randomness of the power output of wind and solar hybrid generating system simultaneously.
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| CN201410223134.XA CN104980090A (en) | 2014-05-26 | 2014-05-26 | Wind-photovoltaic complementary power generation device with hybrid energy storage system |
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Cited By (2)
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| CN113224743A (en) * | 2021-04-16 | 2021-08-06 | 清华四川能源互联网研究院 | Off-line transient control method for DC power supply system with hybrid energy storage |
| CN113691023A (en) * | 2021-07-30 | 2021-11-23 | 华电电力科学研究院有限公司 | Photovoltaic direct-current composite energy storage system and method based on temperature field control technology |
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