CN106877480A - A kind of composite power source energy storing structure and control method - Google Patents
A kind of composite power source energy storing structure and control method Download PDFInfo
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- CN106877480A CN106877480A CN201510914984.9A CN201510914984A CN106877480A CN 106877480 A CN106877480 A CN 106877480A CN 201510914984 A CN201510914984 A CN 201510914984A CN 106877480 A CN106877480 A CN 106877480A
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- power
- battery
- control method
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- energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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 a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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 a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of composite power source energy storing structure discloses a kind of composite power source energy storing structure and control method, including the control of DC side parallel structure, two-stage low-pass ripple, four parts of the amendment of power of battery limit value and hybrid energy-storing Power Control with control method.The present invention is based on two-stage low-pass ripple, proposition determines the hybrid energy-storing control method of time constant filter according to spectrogram, and combining super capacitor and the respective energy storage feature of battery, battery charging and discharging power limit is set, filtering power output is modified, by super capacitor compensated waving spike, charge and discharge using super capacitor reaction it is fast, have extended cycle life and the characteristics of instantaneous large-current discharge and recharge, effectively extend battery.
Description
Art
The present invention relates to a kind of composite power source energy storage, more particularly to a kind of composite power source energy storing structure and control method.
Background technology
Be becoming tight the day of energy crisis and the growth requirement of low-carbon energy promote the utilization of regenerative resource, using it is most be wind-powered electricity generation and photovoltaic.The electric energy of these electricity generation systems has intermittence, and safety and stability, reliability and the quality of power supply on bulk power grid cause influence.In this case, microgrid is considered as the feasible measure of solve problem, energy storage realizes the storage of electric energy, peak load shifting in distributed power generation and microgrid, stabilize new energy goes out the functions such as fluctuation and emergency use, is distributed power generation and link essential in microgrid.Common energy storage device can be divided into power-type and energy type.The former has power density big, and the advantages of fast response time, but energy density is smaller, such as ultracapacitor, superconducting energy storage, flywheel energy storage；The latter has energy density big, but power response is unsuitable for frequent discharge and recharge, such as battery and water-storage more slowly.Due to the limitation of shortcoming, single energy storage device would become hard to meet the requirement of distributed power generation and microgrid, therefore, it is necessary to constitute mixed energy storage system with reference to the energy storage of two or more, give full play to two kinds of technical complementarity of energy storage device.
The topological structure application study of single energy storage device is very ripe, and the research of two or more different type hybrid energy-storing applications is also less.In hybrid energy-storing, different energy storage devices are connected on common bus by different modes, can be with AC parallel connection or DC side parallel.Energy conversion device controls the to and fro flow of power and optimum operation of energy-storage system, and the energy loss and cost of the device are the factors for limiting its application, to consider the balance between technology and economy.Therefore, under identical application scenario, can be using the hybrid energy-storing of different topology structure.
The distributing rationally of hybrid energy-storing, coordinate control and energy management is hot issue in application at present, directly affect cost, life cycle and efficiency of energy-storage system etc., but there is presently no more ripe method.
The content of the invention
The problem of distributed power generation and the requirement of microgrid is met to overcome single energy storage device would become hard to, the present invention proposes a kind of composite power source energy storing structure and control method.
The technical solution adopted for the present invention to solve the technical problems is：The present invention is with super capacitor（SC）As a example by the hybrid energy-storing constituted with battery (Battery), by analyzing the advantage and disadvantage of several topological structures, the rule of topological structure selection is summed up.On the basis of two-stage low-pass ripple principle, it is proposed that the hybrid energy-storing flat volatility Poewr control method based on battery charging and discharging power limit.
Composite power source energy storing structure includes with control method：DC side parallel structure, the control of two-stage low-pass ripple, four parts of the amendment of power of battery limit value and hybrid energy-storing Power Control.
The DC side parallel structure includes DCAC current transformers, two dcdc converters, battery and super capacitors.
The two-stage low-pass ripple control is the spectrogram based on power swing, and the power of super capacitor and battery is determined using the method for LPF.
The power of battery limit value amendment is to set power limit according to battery charging and discharging requirement, is compensated by super capacitor beyond battery charging and discharging power limit.
The hybrid energy-storing Power Control is the power energy feature according to super capacitor and battery, control power distribution between the two.
The beneficial effects of the invention are as follows：Based on two-stage low-pass ripple, proposition determines the hybrid energy-storing control method of time constant filter according to spectrogram, and combining super capacitor and the respective energy storage feature of battery, battery charging and discharging power limit is set, filtering power output is modified, by super capacitor compensated waving spike, charge and discharge using super capacitor reaction it is fast, have extended cycle life and the characteristics of instantaneous large-current discharge and recharge, effectively extend battery.
Brief description of the drawings
Fig. 1 DC side parallel structures.
Fig. 2 two-stage low-pass ripple is controlled.
Fig. 3 power of battery amendment limit values.
Specific embodiment
In Fig. 1, DC/DC has unsteady flow, the function of pressure regulation, therefore, it can connect two kinds of different energy-storage travelling wave tubes of terminal voltage by it, and every kind of energy storage device is directly controlled, while maintaining DC bus-bar voltage constant；And optimize the discharge current of battery, extend its service life；Battery and super capacitor be able to can be made full use of with deep discharge therefore its energy storage capacity, can be with the rated capacity of Optimum Design System.Can also make EMS more flexible configuration using DC/DC.
With energy storage discharge power as just, charge power is negative, is energy storage power output；It is wind power output power；It is photovoltaic power output；It is grid-connected dominant eigenvalues, it is negative when power network power taking just to be when being discharged to power network.To reduce the influences of the batch (-type) distributed power source to distribution network electric energy quality such as wind-powered electricity generation, photovoltaic, grid-connected interconnection power output is smoothed.Fourier transformation is carried out to distributed power source output power first, power swing spectrogram is obtained.The big energy density of super capacitor power density is small, has extended cycle life, and for the component that compensated waving frequency is big but amplitude is small, the small energy density of cell power density is big, for the component that compensated waving frequency is small but amplitude is larger.
After time constant filter determines, the reference power of energy storage only and distributed power source exert oneself it is relevant.If distributed power source is exerted oneself larger fluctuation occurs, the reference power of energy storage compensation also occurs fluctuation.The charging and discharging currents requirement of battery is relatively stricter, to ensure the economic optimization operation of battery, generally to consider charging and discharging state and the charge-discharge electric power limitation of battery.
When battery SOC reaches serious limit value, forbid its discharge and recharge；When SOC is not up to serious limit value, rated power and capacity according to battery limit within the specific limits its charge-discharge electric power.Therefore, in the case where grid-connected power swing requirement is met, the reference power after two-stage low-pass ripple is modified, power limit is set according to battery charging and discharging requirement, compensated by super capacitor beyond battery charging and discharging power limit.
Claims (4)
1. a kind of composite power source energy storing structure and control method, it is characterised in that：Including DC side parallel structure, the control of two-stage low-pass ripple, four parts of the amendment of power of battery limit value and hybrid energy-storing Power Control；
A kind of composite power source energy storing structure as claimed in claim 1 and control method, it is characterised in that the DC side parallel structure is made up of two dcdc converters, a DCAC converter and battery super capacitor.
2. a kind of composite power source energy storing structure as claimed in claim 1 and control method, it is characterised in that the two-stage low-pass filter control is the spectrogram based on power swing, and the power of super capacitor and battery is determined using the method for LPF.
3. a kind of composite power source energy storing structure as claimed in claim 1 and control method, it is characterised in that the power of battery limit value amendment is to set power limit according to battery charging and discharging requirement, is compensated by super capacitor beyond battery charging and discharging power limit.
4. a kind of composite power source energy storing structure as claimed in claim 1 and control method, it is characterised in that the hybrid energy-storing Power Control is the power energy feature according to super capacitor and battery, control power distribution between the two.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510914984.9A CN106877480A (en) | 2015-12-14 | 2015-12-14 | A kind of composite power source energy storing structure and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510914984.9A CN106877480A (en) | 2015-12-14 | 2015-12-14 | A kind of composite power source energy storing structure and control method |
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| CN106877480A true CN106877480A (en) | 2017-06-20 |
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| CN201510914984.9A Pending CN106877480A (en) | 2015-12-14 | 2015-12-14 | A kind of composite power source energy storing structure and control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482662A (en) * | 2017-09-21 | 2017-12-15 | 国网上海市电力公司 | A kind of composite energy storage system suitable for micro-capacitance sensor |
| CN108023361A (en) * | 2018-01-15 | 2018-05-11 | 深圳市泰昂能源科技股份有限公司 | Energy storage type station power source system and control method |
| CN109193613A (en) * | 2018-09-03 | 2019-01-11 | 深圳供电局有限公司 | Direct-current micro-grid system and control method thereof |
| CN110190625A (en) * | 2019-05-30 | 2019-08-30 | 沈阳工业大学 | A kind of double accumulator hybrid energy-storing system optimized control methods |
| CN113541169A (en) * | 2021-06-15 | 2021-10-22 | 广西电网有限责任公司南宁供电局 | Hybrid energy storage system |
-
2015
- 2015-12-14 CN CN201510914984.9A patent/CN106877480A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107482662A (en) * | 2017-09-21 | 2017-12-15 | 国网上海市电力公司 | A kind of composite energy storage system suitable for micro-capacitance sensor |
| CN108023361A (en) * | 2018-01-15 | 2018-05-11 | 深圳市泰昂能源科技股份有限公司 | Energy storage type station power source system and control method |
| CN109193613A (en) * | 2018-09-03 | 2019-01-11 | 深圳供电局有限公司 | Direct-current micro-grid system and control method thereof |
| CN109193613B (en) * | 2018-09-03 | 2022-01-18 | 深圳供电局有限公司 | Direct-current micro-grid system and control method thereof |
| CN110190625A (en) * | 2019-05-30 | 2019-08-30 | 沈阳工业大学 | A kind of double accumulator hybrid energy-storing system optimized control methods |
| CN113541169A (en) * | 2021-06-15 | 2021-10-22 | 广西电网有限责任公司南宁供电局 | Hybrid energy storage system |
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Application publication date: 20170620 |