CN202712956U - Storage battery energy storage and photovoltaic power generation hybrid system - Google Patents

Storage battery energy storage and photovoltaic power generation hybrid system Download PDF

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Publication number
CN202712956U
CN202712956U CN2012203333493U CN201220333349U CN202712956U CN 202712956 U CN202712956 U CN 202712956U CN 2012203333493 U CN2012203333493 U CN 2012203333493U CN 201220333349 U CN201220333349 U CN 201220333349U CN 202712956 U CN202712956 U CN 202712956U
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China
Prior art keywords
electric capacity
transistor
emitter
booster circuit
switch
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CN2012203333493U
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Chinese (zh)
Inventor
姚建歆
周曞昕
郑季伟
徐剑
顾临峰
李志龙
王国友
倪东海
程正敏
唐海强
王飙
徐刚
周静
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Shanghai Municipal Electric Power Co
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Shanghai Municipal Electric Power Co
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The utility model discloses a storage battery energy storage and photovoltaic power generation hybrid system. The hybrid system comprises a photovoltaic array, a storage battery group, a switch direct-current booster circuit, a DC/DC convertor, a direct-current bus, a first capacitor, a three-phase inverter and an alternating-current bus, wherein two input ends of the switch direct-current booster circuit are respectively connected with the two ends of the photovoltaic array; two output ends of the switch direct-current booster circuit are respectively connected with the direct-current bus; the two input ends of the DC/DC convertor are respectively connected with the two ends of the storage battery group; the two output ends of the DC/DC convertor are respectively connected with the direct-current bus; the two input ends of the three-phase inverter are respectively connected the direct-current bus and the output end of the three-phase inverter is connected with the alternating current bus; and the first capacitor is connected between the two input ends of the three-phase inverter. The storage battery energy storage and photovoltaic power generation hybrid system provided by the utility model observably improves the output power stability and conversion efficiency of the solar power generation of a power generation unit and makes a great contribution to the relief of power supply tension during peak hours.

Description

A kind of batteries to store energy and photovoltaic generation hybrid system
Technical field
The utility model relates to a kind of batteries to store energy and photovoltaic generation hybrid system.
Background technology
Photovoltaic generating system is subjected to the impact of weather conditions, and the power output of photo-voltaic power supply can produce larger fluctuation, and causing can not normal power supply.In peak of power consumption season, because producing fluctuation, power output cause electrical network electricity consumption breach problem bigger than normal particularly evident.The while photovoltaic generating system is subject to the impact of power fluctuation also can shorten its useful life.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and batteries to store energy and the photovoltaic generation hybrid system of a kind of stable output power and long service life is provided.
For achieving the above object, the utility model adopts following technical scheme:
A kind of batteries to store energy and photovoltaic generation hybrid system comprise photovoltaic array, batteries, switch DC booster circuit, DC/DC(DC-DC) converter, dc bus, the first electric capacity, three-phase inverter and ac bus, wherein:
Two inputs of described switch DC booster circuit connect respectively the two ends of described photovoltaic array;
Two outputs of described switch DC booster circuit connect respectively described dc bus;
Two inputs of described DC/DC converter connect respectively the two ends of described batteries;
Two outputs of described DC/DC converter connect respectively described dc bus;
Two inputs of described three-phase inverter connect respectively described dc bus, and its output is connected with described ac bus;
Described the first electric capacity is connected between two inputs of described three-phase inverter.
Above-mentioned switch DC booster circuit comprises the second electric capacity, inductance, resistance, diode and first crystal triode, wherein:
One end of described the second electric capacity connects the collector electrode of described first crystal triode by described inductance, the other end of this second electric capacity connects the emitter of described first crystal triode;
Described resistance is connected between the collector and emitter of described first crystal triode;
The positive pole of described diode connects the collector electrode of described first crystal triode;
The end that joins of described the second electric capacity and described inductance is an input of described switch DC booster circuit, and the end that joins of the emitter of described the second electric capacity and described first crystal triode is another input of described switch DC booster circuit;
The negative pole of described diode is an output of described switch DC booster circuit, and the end that joins of the emitter of described the second electric capacity and described first crystal triode is another output of described switch DC booster circuit.
Above-mentioned DC/DC converter comprises the 3rd electric capacity, inductance, two diodes, the second transistor and the 3rd transistors, wherein:
One end of described the 3rd electric capacity connects the collector electrode of described the 3rd transistor by described inductance, the other end of the 3rd electric capacity connects the emitter of described the 3rd transistor;
Described inductance is connected with the emitter of described the second transistor with being connected to hold joining of the 3rd transistor;
A described diode is connected between the collector and emitter of described the second transistor, and described another one diode is connected between the collector and emitter of described the 3rd transistor;
The end that joins of described the 3rd electric capacity and described inductance is an input of described DC/DC converter, and the end that joins of the emitter of described the 3rd electric capacity and described the 3rd transistor is another input of described DC/DC converter;
One output of the very described DC/DC converter of the current collection of described the second transistor, the end that joins of the emitter of described the 3rd electric capacity and described the 3rd transistor is another output of described DC/DC converter.
The beneficial effects of the utility model are: the utility model carries out the daylighting generating with batteries as the energy-storage travelling wave tube of three-phase photovoltaic generating system, improved the quality of photovoltaic generating system output electric energy, making the generating unit carry out the solar power generation conversion efficiency significantly improves, through-put power is large, cost is low, easy maintenance plays useful help for the situation of alleviating peak of power consumption period power tense, has prolonged simultaneously the useful life of photovoltaic generating system.
Description of drawings
Fig. 1 is batteries to store energy in the utility model and the structural representation of photovoltaic generation hybrid system.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
See also Fig. 1, batteries to store energy of the present utility model and photovoltaic generation hybrid system, comprise photovoltaic array 1, batteries 2, switch DC booster circuit 3, DC/DC converter 4, dc bus 5, the first electric capacity 6, three-phase inverter 7 and ac bus 8, wherein:
Two inputs of switch DC booster circuit 3 connect respectively the two ends of photovoltaic array 1;
Two outputs of switch DC booster circuit 3 connect respectively dc bus 5;
Two inputs of DC/DC converter 4 connect respectively the two ends of batteries 2;
Two outputs of DC/DC converter 4 connect respectively dc bus 5;
Two inputs of three-phase inverter 7 connect respectively dc bus 5, and its output is connected with ac bus 8;
The first electric capacity 6 is connected between two inputs of three-phase inverter 7.
Switch DC booster circuit 3 comprises the second capacitor C 2, inductance L 1, resistance R, diode D1 and first crystal triode Q1, wherein:
One end of the second capacitor C 2 connects the collector electrode of first crystal triode Q1 by inductance L 1, the other end of this second capacitor C 2 connects the emitter of first crystal triode Q1;
Resistance R is connected between the collector and emitter of first crystal triode Q1;
The positive pole of diode D1 connects the collector electrode of first crystal triode Q1;
The end that joins of the second capacitor C 2 and inductance L 1 is an input of switch DC booster circuit 3, and the second capacitor C 2 is another input of switch DC booster circuit 3 with the end that joins of the emitter of first crystal triode Q1;
The negative pole of diode D1 is an output of switch DC booster circuit 3, and the second capacitor C 2 is another output of switch DC booster circuit 3 with the end that joins of the emitter of first crystal triode Q1.
DC/DC converter 4 comprises the 3rd capacitor C 3, inductance L 2, diode D2, diode D3, the second transistor Q2 and the 3rd transistor Q3, wherein:
One end of the 3rd capacitor C 3 connects the collector electrode of the 3rd transistor Q3 by inductance L 2, the other end of the 3rd capacitor C 3 connects the emitter of the 3rd transistor Q3;
The end that joins of inductance L 2 and the 3rd transistor Q3 is connected with the emitter of the second transistor Q2;
Diode D2 is connected between the collector and emitter of the second transistor Q2, and diode D3 is connected between the collector and emitter of the 3rd transistor Q3;
The end that joins of the 3rd capacitor C 3 and inductance L 2 is an input of DC/DC converter 4, and the end that joins of the emitter of the 3rd capacitor C 3 and the 3rd transistor Q3 is another input of DC/DC converter 4;
The current collection of the second transistor Q2 is an output of DC/DC converter 4 very, and the end that joins of the emitter of the 3rd capacitor C 3 and the 3rd transistor Q3 is another output of DC/DC converter 4.
Descend in working order photovoltaic array 1 and batteries 2 features that following several modes is arranged:
(1) sufficient period of illumination by day, it is larger that photo-voltaic power supply sends power, and bearing power is also larger, when the dump power on the dc bus 5 is within the scope that the storage battery safety charge power requires, the photovoltaic bus is batteries 2 chargings, and electric capacity neither charges and also do not discharge;
(2) sufficient period of illumination by day, it is larger that photo-voltaic power supply sends power, bearing power is less, dump power on the dc bus 5 requires in limited time upper greater than the storage battery safety charge power, the photovoltaic bus is batteries 2 chargings, capacitance group is in charged state, absorbs superfluous electric energy, thus protection batteries 2;
(3) in the morning, the period of the illumination deficiencies such as night or rainy day, photo-voltaic power supply can not be the load normal power supply, batteries 2 is discharged with cross-flow mode, discharge power is the average power of this period load, when load power is higher than average power, capacitor discharge, discharge power are the difference of load power and batteries 2 discharge powers; When load power was lower than average power, batteries 2 discharge powers were satisfying under the demand of load operation, are capacitor charging with dump power, and are required in order to next load peak.Thereby improved the power output capacity of energy-storage system and optimized the discharge process of batteries 2.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that do not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.

Claims (3)

1. a batteries to store energy and photovoltaic generation hybrid system is characterized in that, comprise photovoltaic array, batteries, switch DC booster circuit, DC/DC converter, dc bus, the first electric capacity, three-phase inverter and ac bus, wherein:
Two inputs of described switch DC booster circuit connect respectively the two ends of described photovoltaic array;
Two outputs of described switch DC booster circuit connect respectively described dc bus;
Two inputs of described DC/DC converter connect respectively the two ends of described batteries;
Two outputs of described DC/DC converter connect respectively described dc bus;
Two inputs of described three-phase inverter connect respectively described dc bus, and its output is connected with described ac bus;
Described the first electric capacity is connected between two inputs of described three-phase inverter.
2. batteries to store energy according to claim 1 and photovoltaic generation hybrid system is characterized in that, described switch DC booster circuit comprises the second electric capacity, inductance, resistance, diode and first crystal triode, wherein:
One end of described the second electric capacity connects the collector electrode of described first crystal triode by described inductance, the other end of this second electric capacity connects the emitter of described transistor;
Described resistance is connected between the collector and emitter of described first crystal triode;
The positive pole of described diode connects the collector electrode of described first crystal triode;
The end that joins of described the second electric capacity and described inductance is an input of described switch DC booster circuit, and the end that joins of the emitter of described the second electric capacity and described first crystal triode is another input of described switch DC booster circuit;
The negative pole of described diode is an output of described switch DC booster circuit, and the end that joins of the emitter of described the second electric capacity and described first crystal triode is another output of described switch DC booster circuit.
3. batteries to store energy according to claim 1 and photovoltaic generation hybrid system is characterized in that, described DC/DC converter comprises the 3rd electric capacity, inductance, two diodes, the second transistor and the 3rd transistors, wherein:
One end of described the 3rd electric capacity connects the collector electrode of described the 3rd transistor by described inductance, the other end of the 3rd electric capacity connects the emitter of described the 3rd transistor;
Described inductance is connected with the emitter of described the second transistor with being connected to hold joining of the 3rd transistor;
A described diode is connected between the collector and emitter of described the second transistor, and described another diode is connected between the collector and emitter of described the 3rd transistor;
The end that joins of described the 3rd electric capacity and described inductance is an input of described DC/DC converter, and the end that joins of the emitter of described the 3rd electric capacity and described the 3rd transistor is another input of described DC/DC converter;
One output of the very described DC/DC converter of the current collection of described the second transistor, the end that joins of the emitter of described the 3rd electric capacity and described the 3rd transistor is another output of described DC/DC converter.
CN2012203333493U 2012-07-10 2012-07-10 Storage battery energy storage and photovoltaic power generation hybrid system Active CN202712956U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738885A (en) * 2012-07-10 2012-10-17 上海市电力公司 Storage battery energy storage and photovoltaic power generation hybrid system
WO2018157838A1 (en) * 2017-03-03 2018-09-07 伊顿智能动力有限公司 Combined dc-dc converter for use in hybrid power system
US10270328B2 (en) 2015-02-04 2019-04-23 Abb Schweiz Ag Multilevel converter with energy storage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738885A (en) * 2012-07-10 2012-10-17 上海市电力公司 Storage battery energy storage and photovoltaic power generation hybrid system
US10270328B2 (en) 2015-02-04 2019-04-23 Abb Schweiz Ag Multilevel converter with energy storage
WO2018157838A1 (en) * 2017-03-03 2018-09-07 伊顿智能动力有限公司 Combined dc-dc converter for use in hybrid power system

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