CN202817783U - Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation - Google Patents

Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation Download PDF

Info

Publication number
CN202817783U
CN202817783U CN2012205027882U CN201220502788U CN202817783U CN 202817783 U CN202817783 U CN 202817783U CN 2012205027882 U CN2012205027882 U CN 2012205027882U CN 201220502788 U CN201220502788 U CN 201220502788U CN 202817783 U CN202817783 U CN 202817783U
Authority
CN
China
Prior art keywords
storage battery
bus
ultracapacitor
control circuit
power generation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2012205027882U
Other languages
Chinese (zh)
Inventor
徐海波
徐顺刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong East Power Co Ltd
Original Assignee
Guangdong East Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong East Power Co Ltd filed Critical Guangdong East Power Co Ltd
Priority to CN2012205027882U priority Critical patent/CN202817783U/en
Application granted granted Critical
Publication of CN202817783U publication Critical patent/CN202817783U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

Landscapes

  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation relates to the fields of the new energy control and application technology. A first detection control circuit is connected between a storage battery and a direct current bus. A super capacitor is connected between an anode and a cathode of the direct current bus through a second detection control circuit. Through using the storage battery and the super capacitor at the same time as energy storage devices of a photovoltaic grid-connected power generation system, and utilizing the characteristics of large capacity and low cost of the storage battery and the characteristics of high power density and long service life of the super capacitor, the effective energy management is carried out on the storage battery and the super capacitor, so that the number of times of the charging and discharging of the storage battery is greatly reduced, and the service life of the storage battery is prolonged.

Description

A kind of ultracapacitor of parallel network power generation and accumulator hybrid energy-storing energy management circuit
Technical field
The present invention relates to new forms of energy control and applied technical field, particularly a kind of ultracapacitor of parallel network power generation and accumulator hybrid energy-storing energy management circuit.
Background technology
In grid-connected photovoltaic system, photovoltaic array can not continue, stably export electric energy owing to the variation of the natural conditions such as intensity of sunshine, ambient temperature, causes photovoltaic generating system existence and stability problem, is difficult to the well variation of follow load.Thereby, the energy storage device of configuration certain capacity is significant to grid-connected photovoltaic system in system, energy storage device can play the effect of light stable photovoltaic generating system power output, so that system is when the fluctuation of generated output or load power is larger, still can keep preferably stability, the stability of increase system when signal disturbance.
In the prior art, usually use storage battery as energy storage device, when the large-signal disturbance appears in electricity generation system, by discharging or absorb in short-term peak power by battery discharging with to charge in batteries, thereby guarantee the stable output power of system.Therefore, configuration suitable capacity storage battery can improve the stability of power output as the grid-connected photovoltaic system of energy storage device, can also increase the schedulability of system, can provide required electric energy in the specific time, and needn't consider the generated output of photovoltaic array this moment, simultaneously also be to solve such as potential pulse, fall, shove and one of the effective way of the dynamic power quality problem such as instantaneous power failure.
Yet, because batteries to store energy is to realize by chemical reaction, its aging speed with discharge and recharge susceptibility, useful life with discharge and recharge number of times direct relation arranged, and in grid-connected photovoltaic system, the power output of photovoltaic array can be with the natural conditions such as intensity of sunshine, ambient temperature frequent variations, storage battery can discharge and recharge frequently, thereby causes in the grid-connected photovoltaic system storage battery to have that aging speed is fast, the life-span short and system maintenance high in cost of production shortcoming.
Summary of the invention
The ultracapacitor and the accumulator hybrid energy-storing energy management circuit that the object of the invention is to avoid weak point of the prior art and a kind of parallel network power generation is provided, the ultracapacitor of this parallel network power generation and accumulator hybrid energy-storing energy management circuit, by using simultaneously storage battery and ultracapacitor as the energy storage device of grid-connected photovoltaic system, by to storage battery and the effective energy management of ultracapacitor, thereby significantly reduce the number of times that discharges and recharges of storage battery, prolong the useful life of storage battery.
Provide a kind of ultracapacitor and accumulator hybrid energy-storing energy management circuit of parallel network power generation for this reason, comprise photovoltaic array, storage battery and combining inverter, photovoltaic array is connected with combining inverter by dc bus, storage battery is connected between the positive and negative electrode of dc bus, is connected to first and detects control circuit between storage battery and dc bus; Having ultracapacitor to detect control circuit by second is connected between the positive and negative electrode of dc bus;
First detects control circuit is used for when detecting DC bus-bar voltage
Figure 2012205027882100002DEST_PATH_IMAGE002
With respect to desired value
Figure DEST_PATH_IMAGE004
Fluctuation greater than preset value
Figure DEST_PATH_IMAGE006
The time, enable storage battery and discharge and recharge to keep the voltage stabilization of dc bus in desired value
Figure 730398DEST_PATH_IMAGE004
First detects control circuit is used for when detecting DC bus-bar voltage
Figure 59748DEST_PATH_IMAGE002
With respect to desired value
Figure 258648DEST_PATH_IMAGE004
Fluctuation less than preset value
Figure 488379DEST_PATH_IMAGE006
The time, disconnect storage battery and dc bus;
Ultracapacitor detects control circuit control by second and is used for keeping the voltage stabilization of dc bus in desired value
Figure 481743DEST_PATH_IMAGE004
Between the positive and negative electrode of dc bus, be connected to filter capacitor.
Storage battery is lead-acid battery or nickel-cadmium cell or lithium battery.
The beneficial effect of the ultracapacitor of a kind of parallel network power generation of the present invention and accumulator hybrid energy-storing energy management circuit is, by using simultaneously storage battery and ultracapacitor as the energy storage device of grid-connected photovoltaic system, utilize the characteristics that storage battery storage capacity is large, cost is low and the ultracapacitor power density high, the life-span is long, storage battery and ultracapacitor are carried out effective energy management, make ultracapacitor be used to continue to keep DC bus-bar voltage
Figure 236072DEST_PATH_IMAGE002
Be stabilized in desired value , and only in DC bus-bar voltage
Figure 621103DEST_PATH_IMAGE002
With respect to desired value
Figure 50948DEST_PATH_IMAGE004
Fluctuation greater than preset value
Figure 354890DEST_PATH_IMAGE006
The time, just enable storage battery and discharge and recharge to keep the voltage stabilization of dc bus in desired value , DC bus-bar voltage
Figure 837266DEST_PATH_IMAGE002
With respect to desired value
Figure 234749DEST_PATH_IMAGE004
Fluctuation less than preset value
Figure 963671DEST_PATH_IMAGE006
Shi Buxu connects storage battery and dc bus, thereby significantly reduces the number of times that discharges and recharges of storage battery, prolongs the useful life of storage battery.
Description of drawings
Fig. 1 is a kind of ultracapacitor of parallel network power generation and the circuit diagram of accumulator hybrid energy-storing energy management circuit.
Fig. 2 is storage battery and super capacitor energy management control curve.
Embodiment
The ultracapacitor of a kind of parallel network power generation of present embodiment and accumulator hybrid energy-storing energy management circuit are as shown in Figure 1, comprise photovoltaic array, storage battery and combining inverter, photovoltaic array is connected with combining inverter by dc bus, storage battery is connected between the positive and negative electrode of dc bus, is connected to first and detects control circuit between storage battery and dc bus; Having ultracapacitor to detect control circuit by second is connected between the positive and negative electrode of dc bus;
First detects control circuit is used for when detecting DC bus-bar voltage
Figure 104802DEST_PATH_IMAGE002
With respect to desired value
Figure 602780DEST_PATH_IMAGE004
Fluctuation greater than preset value
Figure 436744DEST_PATH_IMAGE006
The time, enable storage battery and discharge and recharge to keep the voltage stabilization of dc bus in desired value
Figure 387382DEST_PATH_IMAGE004
First detects control circuit is used for when detecting DC bus-bar voltage With respect to desired value
Figure 183223DEST_PATH_IMAGE004
Fluctuation less than preset value
Figure 125772DEST_PATH_IMAGE006
The time, disconnect storage battery and dc bus;
Ultracapacitor detects control circuit control by second and is used for keeping the voltage stabilization of dc bus in desired value
The beneficial effect of the ultracapacitor of a kind of parallel network power generation of the present invention and accumulator hybrid energy-storing energy management circuit is, by using simultaneously storage battery and ultracapacitor as the energy storage device of grid-connected photovoltaic system, utilize the characteristics that storage battery storage capacity is large, cost is low and the ultracapacitor power density high, the life-span is long, storage battery and ultracapacitor are carried out effective energy management, make ultracapacitor be used to continue to keep DC bus-bar voltage
Figure 108957DEST_PATH_IMAGE002
Be stabilized in desired value
Figure 581527DEST_PATH_IMAGE004
, and only in DC bus-bar voltage
Figure 694976DEST_PATH_IMAGE002
With respect to desired value
Figure 682524DEST_PATH_IMAGE004
Fluctuation greater than preset value
Figure 906832DEST_PATH_IMAGE006
The time, just enable storage battery and discharge and recharge to keep the voltage stabilization of dc bus in desired value
Figure 532110DEST_PATH_IMAGE004
, DC bus-bar voltage With respect to desired value
Figure 291305DEST_PATH_IMAGE004
Fluctuation less than preset value
Figure 381621DEST_PATH_IMAGE006
Shi Buxu connects storage battery and dc bus, thereby significantly reduces the number of times that discharges and recharges of storage battery, prolongs the useful life of storage battery.
Between the positive and negative electrode of dc bus, be connected to filter capacitor C1.
Storage battery is lead-acid battery or nickel-cadmium cell or lithium battery.Cost is lower.
Photovoltaic array is converted to direct current energy to solar energy, and combining inverter is converted to AC energy to direct current energy and sends into utility grid.In the process of generating electricity by way of merging two or more grid systems, in order to suppress the photovoltaic array output-power fluctuation to the impact of the power that is incorporated into the power networks, the control goal-setting of system is the voltage of keeping dc bus
Figure 563203DEST_PATH_IMAGE002
Stable, namely control the voltage of dc bus
Figure 752876DEST_PATH_IMAGE002
Equal desired value
Figure 715016DEST_PATH_IMAGE004
When
Figure 281126DEST_PATH_IMAGE002
＜
Figure 143647DEST_PATH_IMAGE004
The time, energy storage device releases energy and makes
Figure 504221DEST_PATH_IMAGE002
Rise; When
Figure 953657DEST_PATH_IMAGE002
Figure 323458DEST_PATH_IMAGE004
The time, the energy storage device absorbed energy makes
Figure 214054DEST_PATH_IMAGE002
Descend.
In the prior art, usually use storage battery as energy storage device, when the large-signal disturbance appears in electricity generation system, by discharging or absorb in short-term peak power by battery discharging with to charge in batteries, thereby guarantee the stable output power of system, but, because batteries to store energy is to realize by chemical reaction, its aging speed with discharge and recharge susceptibility, useful life with discharge and recharge number of times direct relation arranged, and in grid-connected photovoltaic system, the power output of photovoltaic array can be with intensity of sunshine, the natural conditions such as ambient temperature and frequent variations, storage battery can discharge and recharge frequently, thereby causes that storage battery exists aging speed fast in the grid-connected photovoltaic system, short and system maintenance high in cost of production shortcoming of life-span.
The present invention is by using simultaneously storage battery and ultracapacitor as the energy storage device of grid-connected photovoltaic system, utilize the characteristics that storage battery storage capacity is large, cost is low and the ultracapacitor power density high, the life-span is long, storage battery and ultracapacitor are carried out effective energy management, thereby significantly reduce the number of times that discharges and recharges of storage battery, prolong the useful life of storage battery.
Operation principle of the present invention is as follows:
Storage battery and super capacitor energy management are controlled curve as shown in Figure 2, wherein, Be the control slope of the first detection control circuit,
Figure DEST_PATH_IMAGE010
Be the control slope of the second detection control circuit,
Figure DEST_PATH_IMAGE012
Be the output current of the first detection control circuit, Be the output current of the second detection control circuit, its concrete control characteristic is:
(1) when
Figure DEST_PATH_IMAGE016
The time, battery-operated is in discharge condition, and the first output current that detects control circuit is , ultracapacitor works in discharge condition, and second detects the control circuit output current is
Figure DEST_PATH_IMAGE020
(2) when
Figure DEST_PATH_IMAGE022
, storage battery is not worked, and first detects the control circuit output current is
Figure DEST_PATH_IMAGE024
, ultracapacitor works in discharge condition, and second detects the control circuit output current is
Figure 824158DEST_PATH_IMAGE020
(3) when
Figure DEST_PATH_IMAGE026
The time, storage battery is not worked, and the first electric current that detects control circuit is
Figure 432994DEST_PATH_IMAGE024
, ultracapacitor works in charged state, and second detects the control circuit electric current is
Figure 668803DEST_PATH_IMAGE020
(4) when
Figure DEST_PATH_IMAGE028
The time: battery-operated is in charged state, and first detects the control circuit electric current is
Figure DEST_PATH_IMAGE030
, ultracapacitor works in charged state, and second detects the control circuit electric current is
Figure 240337DEST_PATH_IMAGE020
The voltage of namely working as dc bus
Figure 208293DEST_PATH_IMAGE002
With respect to desired value
Figure 366741DEST_PATH_IMAGE004
Fluctuation at preset value
Figure 78346DEST_PATH_IMAGE006
In the time of in the scope, only have ultracapacitor performance energy storage or release and can act on, and work as the voltage of dc bus
Figure 5850DEST_PATH_IMAGE002
With respect to desired value
Figure 144708DEST_PATH_IMAGE004
Fluctuation surpass preset value
Figure 790453DEST_PATH_IMAGE006
During scope, storage battery and ultracapacitor are jointly brought into play energy storage or are released the effect of energy.So preset value Size and storage battery discharged and recharged substantial connection, if
Figure 25442DEST_PATH_IMAGE006
Value arranges too small, and accumulator cell charging and discharging can be too frequent, does not have the effect of protection storage battery, if
Figure 898982DEST_PATH_IMAGE006
Value arranges excessive, although can reduce the number of times that discharges and recharges of storage battery, the fluctuation of DC bus-bar voltage can become greatly, affects systematic function.
Should be noted that at last; above embodiment only is used for technical scheme of the present invention being described but not limiting the scope of the invention; although with reference to preferred embodiment the present invention has been done detailed description; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from essence and the scope of technical solution of the present invention.

Claims (3)

1. the ultracapacitor of a parallel network power generation and accumulator hybrid energy-storing energy management circuit, comprise photovoltaic array, storage battery and combining inverter, photovoltaic array is connected with combining inverter by dc bus, storage battery is connected between the positive and negative electrode of dc bus, it is characterized in that, between storage battery and dc bus, be connected to first and detect control circuit; Having ultracapacitor to detect control circuit by second is connected between the positive and negative electrode of dc bus;
First detects control circuit is used for when detecting DC bus-bar voltage U CWith respect to desired value U eFluctuation during greater than preset value δ, enable storage battery and discharge and recharge to keep the voltage stabilization of dc bus at desired value U eFirst detects control circuit is used for when detecting DC bus-bar voltage U CWith respect to desired value U eFluctuation during less than preset value δ, disconnect storage battery and dc bus;
Ultracapacitor detects control circuit control by second and is used for keeping the voltage stabilization of dc bus at desired value U e
2. the ultracapacitor of a kind of parallel network power generation according to claim 1 and accumulator hybrid energy-storing energy management circuit is characterized in that, are connected to filter capacitor between the positive and negative electrode of dc bus.
3. the ultracapacitor of a kind of parallel network power generation according to claim 1 and accumulator hybrid energy-storing energy management circuit is characterized in that, storage battery is lead-acid battery or nickel-cadmium cell or lithium battery.
CN2012205027882U 2012-09-27 2012-09-27 Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation Expired - Lifetime CN202817783U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012205027882U CN202817783U (en) 2012-09-27 2012-09-27 Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012205027882U CN202817783U (en) 2012-09-27 2012-09-27 Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation

Publications (1)

Publication Number Publication Date
CN202817783U true CN202817783U (en) 2013-03-20

Family

ID=47876597

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012205027882U Expired - Lifetime CN202817783U (en) 2012-09-27 2012-09-27 Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation

Country Status (1)

Country Link
CN (1) CN202817783U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102882221A (en) * 2012-09-27 2013-01-16 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN105356576A (en) * 2015-10-27 2016-02-24 中广核太阳能开发有限公司 Grid-connection type photovoltaic direct current microgrid system and operational control method therefor
CN105811435A (en) * 2016-05-24 2016-07-27 成都欣维保科技有限责任公司 Reactive compensation method for intelligent energy accumulation power generating system
CN106058845A (en) * 2016-06-13 2016-10-26 上海电力学院 Direct current bus voltage finite time passive control method based on hybrid energy storage
CN106159981A (en) * 2015-04-15 2016-11-23 艾默生网络能源有限公司 A kind of mixed energy storage system and micro-grid system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102882221A (en) * 2012-09-27 2013-01-16 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN102882221B (en) * 2012-09-27 2014-12-31 广东易事特电源股份有限公司 Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN106159981A (en) * 2015-04-15 2016-11-23 艾默生网络能源有限公司 A kind of mixed energy storage system and micro-grid system
CN106159981B (en) * 2015-04-15 2018-12-25 维谛技术有限公司 A kind of mixed energy storage system and micro-grid system
CN105356576A (en) * 2015-10-27 2016-02-24 中广核太阳能开发有限公司 Grid-connection type photovoltaic direct current microgrid system and operational control method therefor
CN105811435A (en) * 2016-05-24 2016-07-27 成都欣维保科技有限责任公司 Reactive compensation method for intelligent energy accumulation power generating system
CN106058845A (en) * 2016-06-13 2016-10-26 上海电力学院 Direct current bus voltage finite time passive control method based on hybrid energy storage

Similar Documents

Publication Publication Date Title
CN102882221B (en) Supercapacitor and storage battery mixed energy-storing energy management circuit in photovoltaic grid-connected power generation
CN100468911C (en) Charging-discharging automatic balancing method for serial power lithium battery
US9082897B2 (en) Solar power storage module, and solar power storage system and solar power supply system having same
KR20130138611A (en) Energy storage system
CN200990518Y (en) Buffer circuit of accumulator pile charging and discharging
CN201466691U (en) Solar cell charging and discharging controller
CN202817783U (en) Super capacitor and storage battery combined energy storage energy management circuit for photovoltaic grid-connected power generation
CN106877368A (en) A kind of photovoltaic generation micro-grid system hybrid energy-storing control method
CN105207341A (en) Grid-connected and off-grid type photovoltaic energy-storage charging pile control device and method
CN102013726A (en) Backup power supply device in wind turbine pitch system
KR20120035714A (en) Apparatus and method of controlling high current, and power storage apparatus using the same
CN103036258A (en) Battery pack balancing system and method
CN105428735A (en) Storage-control-integrated solar energy lithium battery module
CN201466783U (en) Wind-solar complementary power generation power supply device based on photovoltaic array switching control
KR20150106694A (en) Energy storage system and method for driving the same
CN102013714A (en) Wind-solar complementing green energy system and charging method thereof
KR20150005040A (en) Apparatus and method for energy storage system controlling operating mode
CN103036257A (en) Equalizing circuit and method for single inductance type storage battery group
CN204271668U (en) A kind of solar cell charge-discharge controller
CN101841164B (en) Grid-connected system
CN104767248A (en) Intelligent energy source efficient management system
CN204179708U (en) The accumulator charging/discharging circuit of BIPV
CN103208825A (en) Photovoltaic charging system and charging station
CN104037899B (en) A kind of photovoltaic plant Large Copacity energy storage battery operational protection system
CN204441932U (en) Lead-acid battery and lithium battery parallel combined energy storage battery power supply system

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20130320