CN109103902A - A kind of smooth new energy of energy storage goes out the control method and device of fluctuation - Google Patents

A kind of smooth new energy of energy storage goes out the control method and device of fluctuation Download PDF

Info

Publication number
CN109103902A
CN109103902A CN201810879920.3A CN201810879920A CN109103902A CN 109103902 A CN109103902 A CN 109103902A CN 201810879920 A CN201810879920 A CN 201810879920A CN 109103902 A CN109103902 A CN 109103902A
Authority
CN
China
Prior art keywords
energy storage
power
control
new energy
energy
Prior art date
Application number
CN201810879920.3A
Other languages
Chinese (zh)
Inventor
张�浩
王先为
马焕
安昱
杜斌
杨美娟
吴金龙
Original Assignee
国网浙江省电力有限公司
西安许继电力电子技术有限公司
许继集团有限公司
许继电气股份有限公司
国家电网有限公司
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 国网浙江省电力有限公司, 西安许继电力电子技术有限公司, 许继集团有限公司, 许继电气股份有限公司, 国家电网有限公司 filed Critical 国网浙江省电力有限公司
Priority to CN201810879920.3A priority Critical patent/CN109103902A/en
Publication of CN109103902A publication Critical patent/CN109103902A/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
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24Arrangements for preventing or reducing oscillations of power in networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10Flexible AC transmission systems [FACTS]
    • 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
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The present invention relates to new energy power generation grid-connection fields, and in particular to a kind of smooth new energy of energy storage goes out the control method and device of fluctuation.The present invention is handled by carrying out simple and easy analysis to battery energy storage system, is adjusted according to reference input of the processing result to battery energy storage system, to realize that the control to battery energy storage system adjusts.The balance control of energy-storage system itself SOC may be implemented in method of the invention, avoids and introduces complexity in practice in engineering and not mature enough control algolithm causes engineer application to be difficult to realize.

Description

A kind of smooth new energy of energy storage goes out the control method and device of fluctuation

Technical field

The present invention relates to new energy power generation grid-connection fields, and in particular to a kind of smooth new energy of energy storage goes out the control of fluctuation Method and device.

Background technique

Due to being influenced by weather and geographical environment etc. are multifactor, intermittence can be presented in wind-powered electricity generation and photovoltaic power generation power output And the characteristics of fluctuation.The output power direct grid-connected of wind power plant, photovoltaic plant, can to power system stability, mains frequency and Power quality etc. brings huge challenge.

Wind power output power fluctuation high frequency components can usually be absorbed by the rotor inertia of generator, low frequency component fluctuation It can be absorbed by system inertia after accessing power grid, intermediate frequency component (about 0.01Hz~1Hz) fluctuates the influence to connected power grid It is the most serious, it needs to stabilize by configuring energy-storage system.

Present industry is mainly first-order low-pass wave algorithm to the control method for stabilizing fluctuation, but this method has filtering effect The problem of fruit difference.Problem uncontrolled for energy-storage system state-of-charge (SOC) simultaneously, Shanghai Dian Ji University Master's thesis " wind The smooth control strategy study of battery energy storage unit in light storage hybrid grid-connected power generation system " propose the SOC based on fuzzy control Actively adjust control strategy, as shown in Figure 1, but fuzzy control Project Realization process it is excessively complicated, control precision and dynamic product Matter is poor.

Summary of the invention

The object of the present invention is to provide the control method and device that a kind of smooth new energy of energy storage goes out fluctuation, to solve The problem of existing energy-storage system adjustment control method process complexity causes engineer application to be difficult to realize.

To achieve the above object, the controlling party that a kind of smooth new energy of energy storage goes out fluctuation is aspects of which provided Method, comprising:

Method scheme one, charge and discharge degree of balance index and energy storage power output intensity index including determining battery energy storage system, The charge and discharge degree of balance index and energy storage power output intensity index are analyzed and processed, processing result is added to the battery In the reference input of energy-storage system, the analysis processing includes:

Wherein, γ is charge and discharge degree of balance index;δ is energy storage power output intensity index;A and b is setting adjustment parameter;For The processing result.

Method scheme two, on the basis of method scheme one, new energy output power obtains filtered after filtering Output power, the filtered output power and the new energy output power make the difference to obtain the reference input.

Method scheme three, it is described to be filtered into FIR filtering on the basis of method scheme two.

Method scheme four, on the basis of method scheme two or method scheme three, to the new energy output power Power signal carries out spectrum analysis, determines the design requirement of FIR filter, and carry out parameter to FIR filter by MATLAB Design.

Method scheme five, on the basis of method scheme four, new energy includes wind power plant and/or photovoltaic plant.

The present invention also provides a kind of active control set for adjusting of battery energy storage system, comprising:

Device scheme one, including processor and memory, the memory are stored with the processor and realize following method Instruction: determine battery energy storage system charge and discharge degree of balance index and energy storage power output intensity index, to the charge and discharge electric equilibrium Degree index and energy storage power output intensity index be analyzed and processed, by processing result be added to the battery energy storage system reference it is defeated In entering, the analysis processing includes:

Wherein, γ is charge and discharge degree of balance index;δ is energy storage power output intensity index;A and b is setting adjustment parameter;For The processing result.

Device scheme two, on the basis of device scheme one, new energy output power obtains filtered after filtering Output power, the filtered output power and the new energy output power make the difference to obtain the reference input.

Device scheme three, it is described to be filtered into FIR filtering on the basis of device scheme two.

Device scheme four, on the basis of device scheme two or device scheme three, to the new energy output power Power signal carries out spectrum analysis, determines the design requirement of FIR filter, and carry out parameter to FIR filter by MATLAB Design.

Device scheme five, on the basis of device scheme four, new energy includes wind power plant and/or photovoltaic plant.

The beneficial effects of the present invention are: being handled by carrying out simple and easy analysis to battery energy storage system, according to processing As a result the reference input of battery energy storage system is adjusted, to realize that the control to battery energy storage system adjusts.The present invention Method may be implemented energy-storage system itself SOC balance control, avoid engineering introduces in practice complexity and it is not mature enough Control algolithm cause engineer application to be difficult to realize.

The present invention improves the filter effect of system instead of traditional low-pass filtering mode using FIR filter simultaneously, Increase the stability and accuracy of system.

Detailed description of the invention

Fig. 1 is the control strategy block diagram of existing control method;

Fig. 2 is the control strategy block diagram of control method of the present invention;

Fig. 3 is the engineering easy scheme control input and output three-dimensional figure that SOC actively adjusts control strategy.

Specific embodiment

The present invention will be further described in detail with reference to the accompanying drawing.

The present invention provides the control method and device that a kind of smooth new energy of energy storage goes out fluctuation, solve the prior art The defect of calculating process complexity.

Control strategy general frame of the invention is as shown in Fig. 2, be broadly divided into two parts, and one is based on the punching of finite field unit Swash the energy storage smooth control strategy of response filter (FIR filter), improves system filter effect;Two be fuzzy control SOC master The dynamic simple alternative scheme of engineering for adjusting control strategy.P in Fig. 2wpFor wind-powered electricity generation and the total output power of photovoltaic power generation;PrefFor filter P after wavewp;PBrefFor the given reference value of battery energy storage system power output;ΔPBFor power adjustment;PBFor cell output.

1. the energy storage smooth control strategy based on FIR filter.

The spectrum analysis for carrying out wind power plant, photovoltaic plant power signal first, by target new energy power station output work The data sampling of rate calls the tool box of Matlab to carry out fast Fourier analysis, obtains amplitude-versus-frequency curve.

For Amplitude Frequency Characteristic of the wind power plant under most bad working environments, in conjunction with " it is real that wind power plant accesses electric power network technique regulation Apply detailed rules and regulations " in basic demand and maximum power variation rate limitation regulation, determine the design requirement of FIR filter.

The specific design that filter is realized using the tool box FDATool of MATLAB, obtains FIR filter h (n)=w (n)hd(n) parameter w (n), n=0,1, N-1.

In Practical Project, it is only necessary to the sample information that memory saves new energy resources system processing be set, superposition is weighted Simple Calculation can complete the Project Realization of FIR filter.Program filter effect is better than the common low-pass filtering of industry, together When implementation it is simple and easy.

2.SOC actively adjusts the simple alternative scheme of engineering of control strategy.

Energy-storage system needs to carry out itself SOC control while carrying out the control of new energy output smoothing, if cannot maintain The balance of itself charge and discharge, then energy-storage system SOC can be in extreme situation, influence the service life of energy-storage battery.

And the fuzzy of a power is added essentially by fuzzy control is introduced in academia after new energy goes out force filter Regulated quantity, to realize that active of the battery energy storage system when SOC is too high or too low adjusts control.But fuzzy control is excessively multiple It is miscellaneous, it is difficult to be realized in engineer application.

The invention proposes the SOC engineering easy schemes for actively adjusting control strategy to replace fuzzy control, can play close Like identical effect.

When the power variation rate of wind-powered electricity generation and photovoltaic power generation is smaller, provided according to the SOC of energy-storage battery and FIR filter This moment battery energy storage system processing reference value obtain the adjustment amount of power by SOC active adjusting controller.

In the Shanghai Dian Ji University Master's thesis " smooth control of battery energy storage unit in wind-photovoltaic-storage hybrid grid-connected power generation system Strategy study " in, the reference for this moment battery energy storage system processing that the SOC of energy-storage battery and FIR filter are provided Value is converted to charge and discharge degree of balance index γ and energy storage power output intensity index δ, and using the two indexs, SOC is actively adjusted as after The input of controller.The value range of two indices is between -1 to 1.When energy-storage system is full of, γ takes 1, works as energy-storage system γ takes -1 when electricity discharges.When the energy storage power output that system issues is rated power charging, δ takes 1, the δ when rated power electric discharge Take -1.

The output of SOC active adjusting controller is the adjustment amount of energy storage output powerSame value range be -1 to 1 it Between.It indicates that adjustment amount is positive rated power when taking 1, -1 expression adjustment amount is taken to be negative rated power.

Two adjustment parameters a, b are set, and wherein the value range of a is between 0 to 2, and the unlimited value range processed of b, a is energy storage The activation threshold value of SOC active adjusting controller, value are less susceptible to more greatly triggering and come into force, and b is the weight coefficient of controller, value Bigger regulating effect is more obvious.Calculation method is as follows:

And clipping operation is carried out to calculated result.

It is calculatedAs power adjustment Δ PB.It is flat that energy-storage system itself SOC may be implemented using the simple and easy method Weighing apparatus control avoids to introduce in practice in engineering and realizes complicated and not mature enough fuzzy control.

For example, sample frequency Fs is 20kHz, filter Fc=10.8kHz if the FIR filter of 16 ranks need to be designed. Using FDATool can design to obtain filter parameter be followed successively by -0.0369,0.0109,0.0558,0.0054, -0.0873, - 0.0484、0.1805、0.4133、0.4133、0.1805、-0.0484、-0.0873、0.0054、0.0558、0.0109、- 0.0369。

Parameter a is set as 0.7, b and is set as 1.3 simultaneously, then the engineering that SOC actively adjusts control strategy is obtained by calculation It is as shown in Figure 3 that easy scheme controls input and output three-dimensional figure.

Specific embodiment of the present invention is presented above, but the present invention is not limited to described embodiment, Such as the filtering mode of other forms is chosen, or to the equivalent deformation of formula, the technical solution formed in this way is to above-mentioned reality It applies example and is finely adjusted to be formed, this technical solution still falls in protection scope of the present invention.

Claims (10)

1. the control method that a kind of smooth new energy of energy storage goes out fluctuation, it is characterised in that: determine the charge and discharge of battery energy storage system Electric equilibrium degree index and energy storage power output intensity index, divide the charge and discharge degree of balance index and energy storage power output intensity index Analysis processing, processing result is added in the reference input of the battery energy storage system, and the analysis processing includes:
Wherein, γ is charge and discharge degree of balance index;δ is energy storage power output intensity index;A and b is setting adjustment parameter;It is described Processing result.
2. the control method that the smooth new energy of a kind of energy storage according to claim 1 goes out fluctuation, it is characterised in that: new energy Source output power obtains filtered output power after filtering, and the filtered output power and the new energy export Power makes the difference to obtain the reference input.
3. the control method that the smooth new energy of a kind of energy storage according to claim 2 goes out fluctuation, it is characterised in that: described It is filtered into FIR filtering.
4. the control method that the smooth new energy of a kind of energy storage according to claim 2 or 3 goes out fluctuation, it is characterised in that: Spectrum analysis is carried out to the power signal of the new energy output power, determines the design requirement of FIR filter, and pass through MATLAB carries out parameter designing to FIR filter.
5. the control method that the smooth new energy of a kind of energy storage according to claim 4 goes out fluctuation, it is characterised in that: new energy Source includes wind power plant and/or photovoltaic plant.
6. a kind of active control set for adjusting of battery energy storage system, including processor and memory, which is characterized in that described to deposit Reservoir is stored with the instruction that the processor realizes following method: determining the charge and discharge degree of balance index and storage of battery energy storage system Can contribute intensity index, be analyzed and processed to the charge and discharge degree of balance index and energy storage power output intensity index, processing is tied Fruit is added in the reference input of the battery energy storage system, and the analysis processing includes:
Wherein, γ is charge and discharge degree of balance index;δ is energy storage power output intensity index;A and b is setting adjustment parameter;It is described Processing result.
7. a kind of active control set for adjusting of battery energy storage system according to claim 6, it is characterised in that: new energy Output power obtains filtered output power, the filtered output power and the new energy output work after filtering Rate makes the difference to obtain the reference input.
8. a kind of active control set for adjusting of battery energy storage system according to claim 7, it is characterised in that: the filter Wave is FIR filtering.
9. a kind of active control set for adjusting of battery energy storage system according to claim 7 or 8, it is characterised in that: right The power signal of the new energy output power carries out spectrum analysis, determines the design requirement of FIR filter, and pass through MATLAB Parameter designing is carried out to FIR filter.
10. a kind of active control set for adjusting of battery energy storage system according to claim 9, it is characterised in that: new energy Source includes wind power plant and/or photovoltaic plant.
CN201810879920.3A 2018-08-03 2018-08-03 A kind of smooth new energy of energy storage goes out the control method and device of fluctuation CN109103902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810879920.3A CN109103902A (en) 2018-08-03 2018-08-03 A kind of smooth new energy of energy storage goes out the control method and device of fluctuation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810879920.3A CN109103902A (en) 2018-08-03 2018-08-03 A kind of smooth new energy of energy storage goes out the control method and device of fluctuation

Publications (1)

Publication Number Publication Date
CN109103902A true CN109103902A (en) 2018-12-28

Family

ID=64848547

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810879920.3A CN109103902A (en) 2018-08-03 2018-08-03 A kind of smooth new energy of energy storage goes out the control method and device of fluctuation

Country Status (1)

Country Link
CN (1) CN109103902A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2139090A1 (en) * 2008-06-24 2009-12-30 ABB Research Ltd. Method for operating a battery energy storage system
CN102163849A (en) * 2011-03-11 2011-08-24 中国电力科学研究院 Wind power output adaptive smoothing method based on energy storage battery charge state feedback
CN102208818A (en) * 2011-06-03 2011-10-05 中国电力科学研究院 Wavelet-filtering-based output smoothing control method for megawatt wind/solar/battery power generation system
CN102214934A (en) * 2011-06-03 2011-10-12 中国电力科学研究院 Smooth wind-optical generated output control method based on megawatt-grade battery energy-storage power station
CN102522776A (en) * 2011-12-23 2012-06-27 中国电力科学研究院 Method for improving wind power tracking capability on planned output by energy storage system
CN102738817A (en) * 2012-06-14 2012-10-17 华北电力大学 Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system
KR101296806B1 (en) * 2011-12-12 2013-08-14 한국전기연구원 Active Power Control Method of Plural Energy Storage Devices for Grid Connection of Intermittent Generation
CN104242329A (en) * 2014-09-12 2014-12-24 上海电力学院 Micro-grid hybrid energy storage system power distribution method based on fuzzy control rules
CN105226695A (en) * 2015-10-16 2016-01-06 中国电力科学研究院 Polymorphic type energy-storage system energy management method and the system of battery is utilized containing echelon

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2139090A1 (en) * 2008-06-24 2009-12-30 ABB Research Ltd. Method for operating a battery energy storage system
CN102163849A (en) * 2011-03-11 2011-08-24 中国电力科学研究院 Wind power output adaptive smoothing method based on energy storage battery charge state feedback
CN102208818A (en) * 2011-06-03 2011-10-05 中国电力科学研究院 Wavelet-filtering-based output smoothing control method for megawatt wind/solar/battery power generation system
CN102214934A (en) * 2011-06-03 2011-10-12 中国电力科学研究院 Smooth wind-optical generated output control method based on megawatt-grade battery energy-storage power station
KR101296806B1 (en) * 2011-12-12 2013-08-14 한국전기연구원 Active Power Control Method of Plural Energy Storage Devices for Grid Connection of Intermittent Generation
CN102522776A (en) * 2011-12-23 2012-06-27 中国电力科学研究院 Method for improving wind power tracking capability on planned output by energy storage system
CN102738817A (en) * 2012-06-14 2012-10-17 华北电力大学 Method for carrying out self-adaptive smoothing treatment on wind power by battery energy storage system
CN104242329A (en) * 2014-09-12 2014-12-24 上海电力学院 Micro-grid hybrid energy storage system power distribution method based on fuzzy control rules
CN105226695A (en) * 2015-10-16 2016-01-06 中国电力科学研究院 Polymorphic type energy-storage system energy management method and the system of battery is utilized containing echelon

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
N. KAWAKAMI: "Overview of battery energy storage systems for stabilization of renewable energy in Japan", <2012 INTERNATIONAL CONFERENCE ON RENEWABLE ENERGY RESEARCH AND APPLICATIONS (ICRERA)> *
吕超贤等: "基于小波分频与双层模糊控制的多类型储能系统平滑策略", 《电力系统自动化》 *
苏强强: "A风光储联合并网发电系统中电池储能单元的平滑控制策略研究", 《中国优秀硕士学位论文全文数据库》 *

Similar Documents

Publication Publication Date Title
Agarwal et al. LMF-based control algorithm for single stage three-phase grid integrated solar PV system
Yu et al. Analysis and optimization of droop controller for microgrid system based on small-signal dynamic model
Kalcon et al. Small-signal stability analysis of multi-terminal VSC-based DC transmission systems
US9450411B2 (en) Method, apparatus and system for suppressing low frequency oscillation in power system
Strachan et al. Stability of a variable-speed permanent magnet wind generator with weak AC grids
CN103887815B (en) Based on wind energy turbine set parameter identification and the Dynamic Equivalence of service data
Rodriguez et al. Control of grid-connected power converters based on a virtual admittance control loop
Liu et al. Design of a self-tuning PI controller for a STATCOM using particle swarm optimization
EP2529462B1 (en) Method for emulation of synchronous machine
Guan et al. Frequency stability of hierarchically controlled hybrid photovoltaic-battery-hydropower microgrids
CN104836258A (en) Microgrid control method having functions of voltage unbalance compensation and harmonic suppression
CN104485681B (en) A kind of monitoring method of wind energy turbine set energy-storage system
Nguyen et al. Advanced control strategies for wind energy systems: An overview
CN105591392B (en) Improve the blower idle work optimization method of wind power plant economical operation
US7890217B2 (en) Integrated real-time power and solar farm control system
Zhang et al. Proportional resonant individual pitch control for mitigation of wind turbines loads
CN102570476B (en) Repetitive-control-based method for controlling compensation current of DSTATCOM (Distribution Static Synchronous Compensator)
Beddar et al. Experimental enhancement of fuzzy fractional order PI+ I controller of grid connected variable speed wind energy conversion system
CN100530889C (en) Integrated power quality adjustment control method and device
CN105406518B (en) Energy storage participates in the AGC control methods and control system of electric grid secondary frequency modulation
US9203242B2 (en) System and method of integrating wind power and tidal energy
CN104158202B (en) A kind of hybrid energy-storing stabilizes wind power wave propagation system and control method for coordinating thereof
CN103441512B (en) Reactive-load compensation (MMC-STATCOM) method based on modular multi-level converter
CN102439297A (en) Wind power generator control device and control method
AU2015374696B2 (en) Method, device and system for compensating output power of wind turbine generator set

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination