CN105552963A - Photovoltaic power generation grid-connected system based on lithium ion battery energy storage - Google Patents
Photovoltaic power generation grid-connected system based on lithium ion battery energy storage Download PDFInfo
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- CN105552963A CN105552963A CN201610076764.8A CN201610076764A CN105552963A CN 105552963 A CN105552963 A CN 105552963A CN 201610076764 A CN201610076764 A CN 201610076764A CN 105552963 A CN105552963 A CN 105552963A
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- photovoltaic
- energy storage
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- lithium ion
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; 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 networks by storage of energy
- H02J3/32—Arrangements for balancing of the load in networks by storage of energy using batteries or super capacitors 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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a photovoltaic power generation grid-connected system based on lithium ion battery energy storage. The photovoltaic power generation grid-connected system comprises an energy control system and a microgrid system, wherein the energy control system and the microgrid system are in control connection, the micro-grid system comprises an energy storage control system and a photovoltaic power generation system, and the energy storage control system and the photovoltaic power generation system are both in control connection with the energy control system. Through the above mode, in the photovoltaic power generation grid-connected system based on the lithium ion battery energy storage, provided by the invention, a solar power station and the lithium ion battery energy storage system are combined to form a local microgrid system; by controlling charging and discharging of a bidirectional transducer (PCS), the smooth output of photovoltaic generation power is achieved, the impact on a power grid is effectively reduced, the electric energy quality is improved, and a safety accident of the power grid is reduced; and moreover, peak clipping and valley filling and power control of the power grid can be achieved, and a certain effect is exerted on peak adjustment of the power grid.
Description
Technical field
The present invention relates to a kind of electricity generation system, particularly relate to the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage.
Background technology
Solar energy is the same with wind energy resources, and self exists the feature such as intermittence, unsteadiness, which dictates that solar power generation also will meet with the problems such as electric same grid-connected difficulty of following the wind, long-distance sand transport loss are large.Due to inside even from weather, solar power generation is very unstable, particularly large-sized solar power station, along with the instantaneous variation of intensity of illumination, grid-connected power output transient fluctuation is very large, produces great impact to electrical network, there is serious potential safety hazard, and power scheduling is very large.
Summary of the invention
The technical problem that the present invention mainly solves how to provide a kind of to be combined with lithium ion battery energy storage system by solar power station, form the micro-grid system of a local, by controlling the discharge and recharge of reversible transducer (PCS), realize photovoltaic generation power smoothly to export, effective reduction, to the impact of electrical network, improves the quality of power supply, reduces power grid security accident, and electrical network peak load shifting and power control can be realized, to the grid-connected system that peak load regulation network plays a role.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of photovoltaic power generation grid-connecting system based on lithium ion battery energy storage, comprise: energy management system and micro-grid system, control connection between described energy management system and micro-grid system, described micro-grid system comprises energy storage control system and photovoltaic generating system, control connection between described energy storage control system and the equal and described energy management system of photovoltaic generating system, described energy management system issues control command to energy storage control system, described photovoltaic generating system uploads power output in real time to energy management system.
In a preferred embodiment, described energy management system monitors the photovoltaic generation state of energy storage control system and photovoltaic generating system in real time, and provides the one in smooth power pattern, peak load shifting pattern, reactive power compensation pattern or unscheduled power tracing mode to be mode of operation.
In a preferred embodiment, include in described smooth power pattern and site and reversible transducer, according to the power output of the also site detected in real time, and the power output of site raises suddenly or declines time, control charge mode or the discharge mode of reversible transducer, thus realize the power smooth of photovoltaic power generation grid-connecting point.
In a preferred embodiment, described peak load shifting pattern is according to the power output of photovoltaic generating system, control the peak period storage of electrical energy of energy storage control system in power output, at the low ebb phase release electric energy of power output, reach the peak load shifting effect to photovoltaic power generation system output power curve.
In a preferred embodiment, by energy management system, idle control is carried out to energy storage control system in described reactive power compensation pattern, complete the reactive power compensation to electrical network.
In a preferred embodiment, unscheduled power curve, actual photovoltaic power stage curve is included in described unscheduled power tracing mode, described energy management system according to the unscheduled power curve of input and actual photovoltaic power stage curve controlled energy storage control system input-output power, thus makes the power curve of current conveying level off to unscheduled power curve.
In a preferred embodiment, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: 2 step-up transformers, photovoltaic DC-to-AC converter, reversible transducer, photovoltaic array and lithium ion batteries, described step-up transformer respectively and photovoltaic DC-to-AC converter, to be interconnected between reversible transducer, described photovoltaic array is connected with between photovoltaic DC-to-AC converter, and described reversible transducer is connected with between lithium ion battery.
In a preferred embodiment, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: grid-connected switch and public electric wire net, is connected respectively between described grid-connected switch with 2 step-up transformers.
The invention has the beneficial effects as follows: solar power station is combined with lithium ion battery energy storage system, form the micro-grid system of a local, by controlling the discharge and recharge of reversible transducer (PCS), realize photovoltaic generation power smoothly to export, effective reduction, to the impact of electrical network, improves the quality of power supply, reduces power grid security accident, and electrical network peak load shifting and power control can be realized, peak load regulation network is played a role.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of photovoltaic power generation grid-connecting system one specific embodiment that the present invention is based on lithium ion battery energy storage;
Fig. 2 is the concrete device architecture schematic diagram of photovoltaic power generation grid-connecting system one specific embodiment that the present invention is based on lithium ion battery energy storage.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, a kind of photovoltaic power generation grid-connecting system based on lithium ion battery energy storage is provided in one particular embodiment of the present invention, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage comprises: energy management system and micro-grid system, control connection between described energy management system and micro-grid system, described micro-grid system comprises energy storage control system and photovoltaic generating system, control connection between described energy storage control system and the equal and described energy management system of photovoltaic generating system, described energy management system issues control command to energy storage control system, described photovoltaic generating system uploads power output in real time to energy management system.
Described energy management system monitors the photovoltaic generation state of energy storage control system and photovoltaic generating system in real time, and provides the one in smooth power pattern, peak load shifting pattern, reactive power compensation pattern or unscheduled power tracing mode to be mode of operation.Include in described smooth power pattern and site and reversible transducer, according to the power output of the also site detected in real time, and the power output of site raises suddenly or declines time, control charge mode or the discharge mode of reversible transducer, thus realize the power smooth of photovoltaic power generation grid-connecting point.Described peak load shifting pattern, according to the power output of photovoltaic generating system, controls the peak period storage of electrical energy of energy storage control system in power output, at the low ebb phase release electric energy of power output, reaches the peak load shifting effect to photovoltaic power generation system output power curve.
By energy management system, idle control is carried out to energy storage control system in described reactive power compensation pattern, complete the reactive power compensation to electrical network.
Unscheduled power curve, actual photovoltaic power stage curve is included in described unscheduled power tracing mode, described energy management system according to the unscheduled power curve of input and actual photovoltaic power stage curve controlled energy storage control system input-output power, thus makes the power curve of current conveying level off to unscheduled power curve.
In another one embodiment, solar power station (PV) is combined with lithium ion battery energy storage system (ESS), form the micro-grid system of a local, EMS (EMS) is monitoring photovoltaic generating state in real time, and can various modes be operated in, smooth power pattern EMS can according to the program preset, by detecting in real time and the power output of site, when power output raises suddenly or declines, what control reversible transducer (PCS) is operated in charging or discharge mode, realizes the power smooth of photovoltaic power generation grid-connecting point; Peak load shifting pattern EMS is according to PV present output power, and control ESS, in power peak period storage of electrical energy, at power low ebb phase release electric energy, reaches the peak load shifting effect to PV output power curve; Reactive power compensation pattern EMS adopts droop control mode, carries out idle control, complete the reactive power compensation to electrical network to ESS; Unscheduled power tracing mode EMS, according to the unscheduled power curve of input and current actual photovoltaic power stage curve control ESS input-output power, makes the current power curve flowing to electrical network level off to unscheduled power curve.
In a preferred embodiment, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: 2 step-up transformers, photovoltaic DC-to-AC converter, reversible transducer, photovoltaic array and lithium ion batteries, described step-up transformer respectively and photovoltaic DC-to-AC converter, to be interconnected between reversible transducer, described photovoltaic array is connected with between photovoltaic DC-to-AC converter, and described reversible transducer is connected with between lithium ion battery.The described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: grid-connected switch and public electric wire net, is connected respectively between described grid-connected switch with 2 step-up transformers.
Therefore, the present invention has the following advantages: combined with lithium ion battery energy storage system by solar power station, form the micro-grid system of a local, by controlling the discharge and recharge of reversible transducer (PCS), realizing photovoltaic generation power and smoothly exporting, effectively reduce the impact to electrical network, improve the quality of power supply, reduce power grid security accident, and electrical network peak load shifting and power control can be realized, peak load regulation network is played a role.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage, it is characterized in that, comprise: energy management system and micro-grid system, control connection between described energy management system and micro-grid system, described micro-grid system comprises energy storage control system and photovoltaic generating system, control connection between described energy storage control system and the equal and described energy management system of photovoltaic generating system, described energy management system issues control command to energy storage control system, and described photovoltaic generating system uploads power output in real time to energy management system.
2. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 1, it is characterized in that, described energy management system monitors the photovoltaic generation state of energy storage control system and photovoltaic generating system in real time, and provides the one in smooth power pattern, peak load shifting pattern, reactive power compensation pattern or unscheduled power tracing mode to be mode of operation.
3. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 2, it is characterized in that, include in described smooth power pattern and site and reversible transducer, according to the power output of the also site detected in real time, and the power output of site raises suddenly or declines time, control charge mode or the discharge mode of reversible transducer, thus realize the power smooth of photovoltaic power generation grid-connecting point.
4. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 2, it is characterized in that, described peak load shifting pattern is according to the power output of photovoltaic generating system, control the peak period storage of electrical energy of energy storage control system in power output, at the low ebb phase release electric energy of power output, reach the peak load shifting effect to photovoltaic power generation system output power curve.
5. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 2, is characterized in that, carries out idle control, complete the reactive power compensation to electrical network in described reactive power compensation pattern by energy management system to energy storage control system.
6. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 2, it is characterized in that, unscheduled power curve, actual photovoltaic power stage curve is included in described unscheduled power tracing mode, described energy management system according to the unscheduled power curve of input and actual photovoltaic power stage curve controlled energy storage control system input-output power, thus makes the power curve of current conveying level off to unscheduled power curve.
7. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 1, it is characterized in that, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: 2 step-up transformers, photovoltaic DC-to-AC converter, reversible transducer, photovoltaic array and lithium ion batteries, described step-up transformer respectively and photovoltaic DC-to-AC converter, to be interconnected between reversible transducer, described photovoltaic array is connected with between photovoltaic DC-to-AC converter, and described reversible transducer is connected with between lithium ion battery.
8. the photovoltaic power generation grid-connecting system based on lithium ion battery energy storage according to claim 1, it is characterized in that, the described photovoltaic power generation grid-connecting system based on lithium ion battery energy storage also comprises: grid-connected switch and public electric wire net, is connected respectively between described grid-connected switch with 2 step-up transformers.
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Cited By (6)
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| CN106394317A (en) * | 2016-11-10 | 2017-02-15 | 中广核太阳能开发有限公司 | Energy-efficient railway traction power supply system |
| CN107332278A (en) * | 2017-08-25 | 2017-11-07 | 浙江南都电源动力股份有限公司 | Light storing cogeneration system |
| CN108418240A (en) * | 2017-02-10 | 2018-08-17 | 丰郅(上海)新能源科技有限公司 | A kind of energy route system and energy distribution method |
| CN113162106A (en) * | 2020-01-23 | 2021-07-23 | 华为技术有限公司 | Energy storage system and photovoltaic energy storage system |
| CN119151093A (en) * | 2024-11-20 | 2024-12-17 | 中国电力工程顾问集团西南电力设计院有限公司 | Photovoltaic and energy storage coupling generating capacity optimization calculation method and system |
| WO2025036312A1 (en) * | 2023-08-11 | 2025-02-20 | 宁德时代未来能源(上海)研究院有限公司 | Power generating unit system and control method therefor, electronic device, and storage medium |
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| CN106394317A (en) * | 2016-11-10 | 2017-02-15 | 中广核太阳能开发有限公司 | Energy-efficient railway traction power supply system |
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| WO2025036312A1 (en) * | 2023-08-11 | 2025-02-20 | 宁德时代未来能源(上海)研究院有限公司 | Power generating unit system and control method therefor, electronic device, and storage medium |
| CN119151093A (en) * | 2024-11-20 | 2024-12-17 | 中国电力工程顾问集团西南电力设计院有限公司 | Photovoltaic and energy storage coupling generating capacity optimization calculation method and system |
| CN119151093B (en) * | 2024-11-20 | 2025-03-14 | 中国电力工程顾问集团西南电力设计院有限公司 | Photovoltaic and energy storage coupling generating capacity optimization calculation method and system |
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Application publication date: 20160504 |