CN106026202A - Power supply access device and charge and discharge control method thereof - Google Patents

Power supply access device and charge and discharge control method thereof Download PDF

Info

Publication number
CN106026202A
CN106026202A CN201610343620.4A CN201610343620A CN106026202A CN 106026202 A CN106026202 A CN 106026202A CN 201610343620 A CN201610343620 A CN 201610343620A CN 106026202 A CN106026202 A CN 106026202A
Authority
CN
China
Prior art keywords
energy
storage units
charge
power
discharge
Prior art date
Application number
CN201610343620.4A
Other languages
Chinese (zh)
Inventor
刘家乐
徐俊
朱长东
何海斌
Original Assignee
上海电气分布式能源科技有限公司
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 上海电气分布式能源科技有限公司 filed Critical 上海电气分布式能源科技有限公司
Priority to CN201610343620.4A priority Critical patent/CN106026202A/en
Publication of CN106026202A publication Critical patent/CN106026202A/en
Priority claimed from PCT/CN2017/084722 external-priority patent/WO2017198172A1/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J4/00Circuit arrangements for mains or distribution networks not specified as ac or dc
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34Parallel operation in networks using both storage and other dc sources, e.g. providing buffering

Abstract

The invention provides a power supply access device, which is used for being connected to a power generation unit and an energy storage unit and supplying a load with electricity. The power supply access device comprises a rectifier, a DC converter, an unloader, an inverter, a controller and a charge and discharge control device, wherein the rectifier is used for rectifying input of the power generation unit; the DC converter is used for boosting input of the energy storage unit, input of the power generation unit or input of rectified power generation unit; the unloader is used for releasing excess energy; the inverter is used for converting DC into AC; the charge and discharge control device is used for controlling the energy storage unit to discharge or charge; and the controller controls the charge and discharge control device. The invention further provides a charge and discharge control method of the power supply access device. According to the power supply access device provided by the invention, the charge and discharge frequency of the energy storage unit is reduced by changing the connection mode of the energy storage unit, so that the service time of the energy storage unit is prolonged; the operation cost of a micro-grid system formed by the power supply access device is reduced; and stable and reliable power supply of the micro-grid system is ensured.

Description

A kind of power supply access device and charge/discharge control method thereof
Technical field
The present invention relates to field of electrical control, be specifically related to a kind of power supply access device and charge/discharge control method thereof.
Background technology
The quick increase-volume of semiconductor power device, the reaching its maturity of modern control theory, the intellectuality of power system The development developing into the micro-capacitance sensor device in micro-grid system brings opportunity.
In typical smart micro-grid system, access in order to safe efficient and make full use of distributed energy, Including commutator, inverter, DC converter, unloader and energy-storage units, as it is shown in figure 1, blower fan and The electric energy that photovoltaic module produces charges to energy-storage units, energy-storage units electric discharge power to direct current or AC load.
Using such structure, in micro-capacitance sensor power supply process, energy-storage units is ceaselessly charging, is discharging, and The discharge and recharge number of times of energy-storage units is all limited, and through use after a while, energy-storage units will be scrapped, Must change so that the operating cost of micro-grid system is higher.
Summary of the invention
In view of problems of the prior art, it is an object of the invention to provide a kind of power supply access device, by changing Become the connected mode of energy-storage units, decrease the discharge and recharge number of times of energy-storage units, thus extend making of energy-storage units With the time, reduce the operating cost of the micro-grid system being made up of power supply access device, it is ensured that micro-grid system is steady Determine reliably to power.
The present invention provides a kind of power supply access device, is used for accessing generator unit and energy-storage units and powers to the load, Power supply access device includes commutator, DC converter, unloader, inverter and controller, and commutator is used for The rectification of generator unit input, DC converter is after to energy-storage units input, generator unit input or rectification Generator unit input boosting, unloader is used for discharging excess energy, inverter for direct current being converted to exchange, Power supply access device also includes charge-discharge controller, is used for controlling energy-storage units electric discharge or charging, controller Control charge-discharge controller.
Further, charge-discharge controller is arranged between energy-storage units and high voltage bus.
Further, DC converter is BOOST booster circuit.
Further, the positive pole of energy-storage units is by the inductance of BOOST booster circuit with charge-discharge controller even Connect, then be connected on high voltage bus by charge-discharge controller.
Further, charge-discharge controller includes half-duplex channel and controlled path, the wherein controlled path of parallel connection During disconnection, energy-storage units is discharged by half-duplex channel, and during controlled path conducting, energy-storage units passes through controlled path Charging.
Further, controlled path is provided with the first gate-controlled switch, and half-duplex channel is provided with for one-way conduction Diode.
Further, power supply access device includes one or more groups energy-storage units incoming end.
Further, power supply access device includes organizing energy-storage units incoming end more, is used for accessing charge-discharge characteristic phase Same or different energy-storage units.
Further, energy-storage units incoming end accesses the energy-storage units that charge-discharge characteristic is different, and controller is with difference Priority or different frequencies to energy-storage units discharge.
Further, controller has battery management function.
The present invention also provides for the charge/discharge control method of a kind of above-mentioned power supply access device, comprises the following steps:
When the power of a electricity that () generator unit sends is more than the product of bearing power and the first coefficient, if energy-storage units Underfill, controls to charge to energy-storage units;If energy-storage units has been filled with, cut out energy-storage units, start unloader;
When the power of b electricity that () generator unit sends is less than the product of bearing power and the second coefficient, control energy-storage units Electric discharge, energy-storage units powers to the load together with generator unit;
The power of c electricity that () generator unit sends more than or equal to bearing power and the second coefficient product and less than or etc. When bearing power is with the product of the first coefficient, cut out energy-storage units.
Further, the first coefficient is more than or equal to described second coefficient.
Compared with prior art, the power supply access device of present invention offer and charge/discharge control method thereof, have following Beneficial effect: by changing the connected mode of energy-storage units, decrease the discharge and recharge number of times of energy-storage units, thus Extend the use time of energy-storage units, reduce the operating cost of the micro-grid system being made up of power supply access device, Ensure that micro-grid system is reliablely and stablely powered.
Accompanying drawing explanation
Fig. 1 is the structural representation of power supply access device of the prior art;
Fig. 2 is the structural representation of the power supply access device of one embodiment of the present of invention;
Fig. 3 is the circuit diagram of two-way BUCK-BOOST circuit and charge-discharge controller;
Fig. 4 is a kind of circuit diagram of BOOST booster circuit and charge-discharge controller;
Fig. 5 is the another kind of circuit diagram of BOOST booster circuit and charge-discharge controller;
Fig. 6 is the structural representation of the power supply access device of another embodiment of the present invention.
Detailed description of the invention
As in figure 2 it is shown, the power supply access device of one embodiment of the present of invention, it is used for accessing generator unit and storage Energy unit also powers to the load, and power supply access device includes commutator, DC converter, unloader, inverter With controller, commutator for generator unit input rectification, DC converter for energy-storage units input, Generator unit input boosting after generator unit input or rectification, unloader is used for discharging excess energy, inverter For direct current is converted to exchange, power supply access device also includes charge-discharge controller, is used for controlling energy storage list Unit's electric discharge or charging, controller controls charge-discharge controller.
Generator unit can be direct-current generating device and/or ac power generation.
Generator unit can be one, it is also possible to is multiple.
Generator unit two in the present embodiment, generator unit includes direct-current generating device and ac power generation, Qi Zhongzhi Stream TRT is photovoltaic module, and ac power generation is blower fan, and certain ac power generation can also be diesel generation Machine, naturally it is also possible to only include blower fan, or only include photovoltaic, the invention is not limited in this regard.
In the present embodiment, energy-storage units is lead-acid battery.Energy-storage units can also be lead-acid battery, lithium battery, liquid The battery such as galvanic battery or sodium-sulphur battery, the invention is not limited in this regard.
Power supply access device also includes controller, is used for controlling DC converter, unloader, inverter and charge and discharge Controller for electric consumption.
Charge-discharge controller is arranged between energy-storage units and high voltage bus.
In the present embodiment, a kind of circuit, as it is shown on figure 3, DC converter is two-way BUCK-BOOST circuit, stores up The positive pole of the energy unit diode D2 parallel circuit by the second gate-controlled switch Q2 with one-way conduction, is connected to double To first end of the inductance L of BUCK-BOOST circuit, the other end ground connection of inductance L;Including the first gate-controlled switch Q1 and the charge-discharge controller of the diode D1 of one-way conduction, be connected to the first end and the high voltage bus of inductance L Between.
Charge-discharge controller includes half-duplex channel and the controlled path of parallel connection, when wherein controlled path disconnects, storage Can be discharged by half-duplex channel, i.e. to load output power by unit;During controlled path conducting, energy-storage units passes through Controlled path is charged.
Specifically, controlled path is provided with the first gate-controlled switch Q1, and half-duplex channel is provided with for one-way conduction Diode D1, controller controls disconnection and the conducting of the first gate-controlled switch Q1 by controlling end A.
The charge/discharge control method of the power supply access device in the present embodiment, comprises the following steps:
When the power of a electricity that () generator unit sends is more than the product of bearing power and the first coefficient, if energy-storage units Underfill, controls to charge to energy-storage units;If energy-storage units has been filled with, cut out energy-storage units, start unloader;
When the power of b electricity that () generator unit sends is less than the product of bearing power and the second coefficient, control energy-storage units Electric discharge, energy-storage units powers to the load together with generator unit;
The power of c electricity that () generator unit sends more than or equal to bearing power and the second coefficient product and less than or etc. When bearing power is with the product of the first coefficient, cut out energy-storage units.
Second gate-controlled switch Q2 is used for controlling whether to access energy-storage units, and concrete control flow is as follows:
(1)Time, if energy-storage units has been filled with, cut out energy-storage units, and start unloader, Discharge unnecessary power;If energy-storage units underfill, energy-storage units is charged;
Specifically, if energy-storage units has been filled with, controller cuts out the PWM of the control end A of the first gate-controlled switch Q1 Signal, simultaneously closes off the PWM, the first gate-controlled switch Q1 of the control end B of the second gate-controlled switch Q2 and second controlled Switch Q2 is in off-state, cuts out energy-storage units, it is to avoid energy-storage units overcharges, to extend energy storage list The service life of unit;
If energy-storage units underfill, controller opens the pwm signal of the control end A of the first gate-controlled switch Q1, Simultaneously close off the PWM, the first gate-controlled switch Q1 of control end B of the second gate-controlled switch Q2 in an ON state, and Second gate-controlled switch Q2 is off, and the electricity that generator unit sends is input to high voltage bus, by high voltage bus Charge to energy-storage units;
(2)Time, energy-storage units is cut out, only generator unit powers to the load, To reach power-balance, reduce the number of times of the discharge and recharge to energy-storage units, thus extend the use longevity of energy-storage units Life;
Specifically, controller cuts out the pwm signal of the control end A of the first gate-controlled switch Q1, simultaneously closes off second The PWM, the first gate-controlled switch Q1 and the second gate-controlled switch Q2 of the control end B of gate-controlled switch Q2 is in disconnecting State, cuts out energy-storage units;
(3)PIN< φ2POUTTime, by energy-storage units cut, energy-storage units discharge, together with generator unit to Load supplying, to reach power-balance;
Specifically, controller cuts out the pwm signal of the control end A of the first gate-controlled switch Q1, opens second simultaneously The PWM of the control end B of gate-controlled switch Q2, the first gate-controlled switch Q1 is off, and the second gate-controlled switch Q2 in an ON state, cuts energy-storage units;
Wherein, PINFor the power summation of generator unit generating, POUTFor output.φ1It is the first coefficient, φ2For Second coefficient, can be identical, it is also possible to different.
φ1With φ2Time identical, such as φ1=1, φ2=1, now PINLess than POUTTime, energy-storage units discharges, Power to the load together with generator unit;PINEqual to POUTTime, cut out energy-storage units;PINMore than POUTTime, as Really energy-storage units has been filled with, and cuts out energy-storage units, it is to avoid energy-storage units overcharges, and extends making of energy-storage units With the life-span, if energy-storage units underfill, unnecessary power is used to charge to energy-storage units.
In order to avoid PINEqual to POUTNeighbouring frequently switching, the most slightly smaller than POUT, energy-storage units discharges, slightly More than POUTCut out again energy-storage units or charge to energy-storage units, it is possible to use different φ1With φ2, φ1More than φ2 Such as φ1=1.05, φ2=1, now PINLess than POUTTime, energy-storage units discharge, together with generator unit to Load supplying;PINMore than POUT1.05 times time, whether be full of according to energy-storage units, operate accordingly; And PINIt is in POUTWith POUT1.05 times between, cut out energy-storage units, namely generator unit send electricity Power balances with bearing power.
In another embodiment, using circuit as shown in Figure 4, DC converter is BOOST booster circuit, The positive pole of energy-storage units is connected with charge-discharge controller by the inductance L of BOOST booster circuit, then by filling Discharge control device is connected on high voltage bus.Specifically, the first gate-controlled switch Q1 and the diode of one-way conduction After D1 parallel connection, it is connected between inductance L and high voltage bus.
First gate-controlled switch Q1 can use IGBT, metal-oxide-semiconductor, if IGBT, metal-oxide-semiconductor itself carry unidirectional Logical diode, now without being separately provided one-way conduction diode;But when if electric current is bigger, it is possible to individually set Put one-way conduction diode.
In another embodiment, using circuit as shown in Figure 5, DC converter is BOOST booster circuit, First gate-controlled switch Q1 can use bidirectional thyristor.
In the present embodiment, power supply access device includes one group of energy-storage units incoming end, in another embodiment, As shown in Figure 6, power supply access device includes two groups of energy-storage units incoming ends, it is possible to access two groups of energy-storage units: Battery 1 and battery 2, battery 1 and battery 2 control charge and discharge by charge-discharge controller respectively, when negative When the power difference of the electricity that load and generator unit send is bigger, two Battery packs electric discharge outputs can be used simultaneously, To ensure electric power system stable power-supplying;Or during a Battery pack charging, use another Battery pack electric discharge output.
Certainly power supply access device can also include one group of energy-storage units incoming end, the invention is not limited in this regard.
Use the power supply access device in the present embodiment, many group energy-storage units incoming ends can access charge-discharge characteristic Identical or different energy-storage units, the most all accesses lead-acid battery;Lead-acid battery and lithium electricity can also be respectively connected to Pond, wherein lithium battery is more suitable for frequent discharge and recharge, therefore in power supply process, preferentially uses lithium battery;Or Lead-acid battery is discharged with lithium battery by person with different frequencies.
Battery management system (BMS), primarily to the utilization rate of battery can be improved, prevents battery from occurring excessively Charging and over-discharge, extend the service life of battery, the state of monitoring battery.
In the present embodiment, the function of the controller following BMS of realization:
(1) state-of-charge (State of Charge, i.e. SOC) of energy-storage units, i.e. energy-storage units are estimated Dump energy, it is ensured that in the range of SOC maintains reasonably, thus prevent owing to overcharge or overdischarge are to energy storage Unit cause damage;
(2) in energy-storage units charge and discharge process, Real-time Collection terminal voltage, charging and discharging currents, prevent battery from sending out Raw overcharge or overdischarge phenomenon.
Controller realizes BMS function, can effectively save battery 3%, thus reduce integral device Cost.
The preferred embodiment of the present invention described in detail above.Should be appreciated that the ordinary skill people of this area Member just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all skill In art field technical staff the most on the basis of existing technology by logical analysis, reasoning or The available technical scheme of limited experiment, all should be in the protection domain being defined in the patent claims.

Claims (12)

1. a power supply access device, is used for accessing generator unit and energy-storage units and powers to the load, and described confession is electrically accessed Device includes commutator, DC converter, unloader, inverter and controller, and described commutator is used for generator unit The rectification of input, described DC converter is for the generating after energy-storage units input, generator unit input or rectification Unit input boosting, described unloader is used for discharging excess energy, and described inverter is used for being converted to direct current exchange, It is characterized in that, power supply access device also includes charge-discharge controller, be used for controlling the electric discharge of described energy-storage units or Charging, described controller controls described charge-discharge controller.
Power the most as claimed in claim 1 access device, it is characterised in that described charge-discharge controller is arranged at institute State between energy-storage units and high voltage bus.
Power the most as claimed in claim 2 access device, it is characterised in that described DC converter is BOOST boosting Circuit.
Power the most as claimed in claim 3 access device, it is characterised in that the positive pole of described energy-storage units passes through BOOST The inductance of booster circuit is connected with charge-discharge controller, then is connected on high voltage bus by charge-discharge controller.
Power the most as claimed in claim 1 access device, it is characterised in that described charge-discharge controller includes parallel connection Half-duplex channel and controlled path, wherein said controlled path disconnect time, energy-storage units is discharged by described half-duplex channel, During the conducting of described controlled path, energy-storage units is charged by controlled path.
Power the most as claimed in claim 5 access device, it is characterised in that it is controlled that described controlled path is provided with first Switch, described half-duplex channel is provided with the diode for one-way conduction.
Power the most as claimed in claim 1 access device, it is characterised in that described power supply access device include one group or Many group energy-storage units incoming ends.
Power the most as claimed in claim 1 access device, it is characterised in that described power supply access device includes organizing storage more Energy unit incoming end, for accessing the energy-storage units that charge-discharge characteristic is identical or different.
Power the most as claimed in claim 1 access device, it is characterised in that described energy-storage units incoming end accesses charge and discharge The energy-storage units that electrical characteristics are different, described controller with different priority or different frequencies to described energy storage list Unit's electric discharge.
Power the most as claimed in claim 1 access device, it is characterised in that described controller has battery management function.
The charge/discharge control method of 11. 1 kinds of power supply access devices as described in any one of claim 1-10, its feature exists In, comprise the following steps:
When the power of a electricity that () generator unit sends is more than the product of bearing power and the first coefficient, if described energy storage Unit underfill, controls to charge to described energy-storage units;If described energy-storage units has been filled with, cut out described storage Energy unit, starts unloader;
When the power of b electricity that () described generator unit sends is less than the product of described bearing power and the second coefficient, control Described energy-storage units discharge, described energy-storage units together with described generator unit to described load supplying;
The power of c electricity that () described generator unit sends more than or equal to described bearing power and the second coefficient product and During less than or equal to the product of bearing power and the first coefficient, cut out described energy-storage units.
The charge/discharge control method of 12. access devices of powering as claimed in claim 11, it is characterised in that described first Coefficient is more than or equal to described second coefficient.
CN201610343620.4A 2016-05-20 2016-05-20 Power supply access device and charge and discharge control method thereof CN106026202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610343620.4A CN106026202A (en) 2016-05-20 2016-05-20 Power supply access device and charge and discharge control method thereof

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN201610343620.4A CN106026202A (en) 2016-05-20 2016-05-20 Power supply access device and charge and discharge control method thereof
PCT/CN2017/084722 WO2017198172A1 (en) 2016-05-20 2017-05-17 Power supply connection device, and charging-discharging control method for same
CA3019619A CA3019619C (en) 2016-05-20 2017-05-17 Power supply connection device, and charging-discharging control method for same

Publications (1)

Publication Number Publication Date
CN106026202A true CN106026202A (en) 2016-10-12

Family

ID=57096670

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610343620.4A CN106026202A (en) 2016-05-20 2016-05-20 Power supply access device and charge and discharge control method thereof

Country Status (1)

Country Link
CN (1) CN106026202A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106482300A (en) * 2016-10-31 2017-03-08 广东美的制冷设备有限公司 Solar air conditioner control method, device and solar air conditioner
WO2017198172A1 (en) * 2016-05-20 2017-11-23 上海电气分布式能源科技有限公司 Power supply connection device, and charging-discharging control method for same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201576716U (en) * 2009-12-07 2010-09-08 山西省电力公司长治供电分公司 Charge and discharge controller of sealing valve controlled lead-acid battery pack
CN102710005A (en) * 2012-06-04 2012-10-03 国电南瑞科技股份有限公司 Power supply method for grid-connected and off-grid dual-purpose wind and light complement power generation system
CN103904735A (en) * 2014-03-11 2014-07-02 哈尔滨工程大学 Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem
CN104505867A (en) * 2015-01-04 2015-04-08 南京国臣信息自动化技术有限公司 Alternating current and direct current hybrid micro-grid system and control strategy thereof
CN205622244U (en) * 2016-05-20 2016-10-05 上海电气分布式能源科技有限公司 Power supply access device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201576716U (en) * 2009-12-07 2010-09-08 山西省电力公司长治供电分公司 Charge and discharge controller of sealing valve controlled lead-acid battery pack
CN102710005A (en) * 2012-06-04 2012-10-03 国电南瑞科技股份有限公司 Power supply method for grid-connected and off-grid dual-purpose wind and light complement power generation system
CN103904735A (en) * 2014-03-11 2014-07-02 哈尔滨工程大学 Energy storage subsystem used for batch-type renewable energy source power generation system and control method of energy storage subsystem
CN104505867A (en) * 2015-01-04 2015-04-08 南京国臣信息自动化技术有限公司 Alternating current and direct current hybrid micro-grid system and control strategy thereof
CN205622244U (en) * 2016-05-20 2016-10-05 上海电气分布式能源科技有限公司 Power supply access device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017198172A1 (en) * 2016-05-20 2017-11-23 上海电气分布式能源科技有限公司 Power supply connection device, and charging-discharging control method for same
CN106482300A (en) * 2016-10-31 2017-03-08 广东美的制冷设备有限公司 Solar air conditioner control method, device and solar air conditioner

Similar Documents

Publication Publication Date Title
KR101369692B1 (en) Energy storage system and controlling method of the same
CN203119515U (en) Portable wireless charger
KR101174891B1 (en) Energy storage system and controlling method of the same
CN103427430B (en) A kind of energy management method of mixed energy storage system in microgrid
CN102361101B (en) Method for energy-saving charging and discharging of cells and system for testing energy-saving charging and discharging of cells
WO2018028518A1 (en) Electric vehicle energy management system, control method therefor, and electric vehicle
US8963499B2 (en) Battery pack, method of controlling the same, and energy storage system including the battery pack
EP3207579A1 (en) Systems and methods for series battery charging and forming
KR101097265B1 (en) Energy storage system and controlling method of the same
ES2741429T3 (en) Electrical supply system with integration of wind energy, solar energy, diesel fuel generator and grid supply
TWI221695B (en) Uninterruptible power system
KR101084214B1 (en) Grid-connected energy storage system and method for controlling grid-connected energy storage system
CN103904735B (en) A kind of energy storage subsystem for batch (-type) renewable energy system and control method thereof
CN102856946B (en) Electrical storage device and accumulating system
KR20110068640A (en) Energy storage system of an apartment house and integrated power management system and method for controlling thereof
AT510938B1 (en) Photovoltaic system
US6369463B1 (en) Apparatus and method for supplying alternative energy and back-up emergency power to electrical devices
Moo et al. Parallel operation of battery power modules
JP5706474B2 (en) Battery charging device and battery charging method
EP2994973B1 (en) Hybrid energy sourced battery or super-capacitor fed drive topologies
CN105308825B (en) Precharge for DC-AC inverter and voltage supply system
CN104065157A (en) Uninterruptible power supply with improved power supply reliability
KR20150048875A (en) Topology and control strategy for hybrid storage systems
EP2330712A1 (en) Energy storage system
CN202586367U (en) Photovoltaic power generation energy storage system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20161012