CN108711873A - A kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller - Google Patents
A kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller Download PDFInfo
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- CN108711873A CN108711873A CN201810534003.1A CN201810534003A CN108711873A CN 108711873 A CN108711873 A CN 108711873A CN 201810534003 A CN201810534003 A CN 201810534003A CN 108711873 A CN108711873 A CN 108711873A
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller.The reference value and actual value of energy storage group's active power of output are handled to obtain the reference value of the output current of all energy-storage systems by nonlinearity erron controller；Establish the communication network of all energy-storage systems inside connection energy storage group；Each energy-storage system is controlled using distribution type non-linear collaborative controller.The present invention improves the active power assignment accuracy of energy storage group；Improve the dynamic responding speed of energy-storage system power control；Reduce influence of the interference to energy storage group's power control；Improve the ability that energy storage group copes with communication failure.
Description
Technical field
The present invention relates to a kind of grid power control methods, more particularly, to a kind of based on distribution type non-linear collaboration control
Energy storage group's Poewr control method of device processed.
Background technology
It is not true caused by electric system that intermittent, fluctuation new energy a large amount of accesses can be effectively relieved in energy-storage system
Qualitative disturbance improves the ability of electric system consumption new energy.In addition, being carried out for the energy storage group being made of a large amount of energy-storage systems
Efficiently management, may be implemented to provide perfect technical support to power system voltage, frequency fluctuation and electricity market power trade.
However, for the energy-storage system of local position distribution, accurate, the quick control of energy storage group's output power how is realized, on meeting
The power dispatching demand of grade scheduling system, has become the hot issue of energy-storage system or energy storage group's research field.Energy storage group is defeated
Can general power be gone out meet power system requirements, determine that can the function of energy-storage system be filled exploitation.
The target of the power control of energy storage group and energy-storage system is：
Wherein, P*, P be respectively energy storage group's active power of output reference value and actual value；I=1,2 ..., n, n are energy storage
The quantity of the internal energy-storage system of group；xiThe reference value and actual value of the output current electric current of respectively i-th energy-storage system.
Above formula is the target of energy storage group's power control and the Important Theoretic Foundation of energy-storage system distributed AC servo system.
Realize that the control of energy storage group's power, existing method generally use and acquires all energy storage in real time by control centre
The summation of system output power controls each energy-storage system output power by centralized communication network and energy management method
Size.However, since energy-storage system is local position distribution so that structure centralized communication network becomes extremely complex, Er Qiecheng
This is higher, vulnerability to jamming is poor.Find it is a kind of independent of complicated communication network, the power of system operation robustness can be improved
Control method realizes the efficient management of energy storage group's output power to replace existing Poewr control method, becomes in order at present urgently
It need to solve the problems, such as.
Invention content
To solve the above problems, the present invention proposes a kind of energy storage group's power control based on distribution type non-linear collaborative controller
Method processed.The present invention is directed to the energy storage group containing a large amount of energy-storage systems, is based on nonlinear theory and network control method, establishes every
The control method of a energy-storage system and energy storage group's output power improves communication system robustness, realization energy storage group to reach
Power is accurate, stability contorting purpose.
Technical scheme of the present invention uses following steps, as shown in Figure 1：
1) reference value of energy storage group's active power of output and actual value are handled to obtain institute by nonlinearity erron controller
There is the reference value of the output current of energy-storage system；
2) communication network of all energy-storage systems inside connection energy storage group is established；
3) controlling each energy-storage system using distribution type non-linear collaborative controller makes the output electricity of all energy-storage systems
The actual value of stream levels off to reference value.
In the step 1), nonlinearity erron control that the reference value of the output current of all energy-storage systems passes through following formula
Device processed obtains：
Wherein,For the output current reference value of i-th of energy-storage system, i=1,2 ..., n, n, which is in energy storage group, includes
The quantity of energy-storage system；P*, P be respectively energy storage group's active power of output reference value and actual value, e is natural Exponents, and λ is to adjust
Save the factor.
In the step 2), for each energy-storage system inside energy storage group, which is passed through into communication line
Other one or more energy-storage systems nearest with its actual range are connect, to connect all energy-storage systems of energy storage group
Communication network is formed, communication network is expressed as：
Wherein, C is communication matrix；εijFor communication strength factor；cijTo communicate coefficient, 0<cij<1 indicates j-th of energy storage system
System is connected with i-th of energy-storage system, cij=0 j-th of power supply of expression is not connected with i-th of power supply；I and j represent energy storage
The ordinal number of the internal energy-storage system of group, i, j=1,2 ..., n；Ln represents natural logrithm operation.
In the step 3), the expression formula of distribution type non-linear collaborative controller is：
Wherein, uiFor the controlled quentity controlled variable of the energy storage output power of i-th of energy-storage system；For the output electricity of i-th of energy-storage system
Flow the first derivative of reference value；Tanh () is hyperbolic tangent function；eiFor i-th of energy-storage system output current reference value with it is defeated
Go out the difference of current actual value,ejFor j-th of energy-storage system output current reference value and output current actual value it
Difference, For the output current reference value of i-th, j-th energy-storage system, xi、xjRespectively i-th, jth
The output current current actual value of a energy-storage system；Sin is SIN function.
Each energy-storage system is controlled using distribution type non-linear collaborative controller in the step 3), makes all energy storage
The actual value of the output current of system levels off to reference value.
The beneficial effects of the invention are as follows：
The present invention carries out the control of output power inside energy storage group using the reference value of each energy-storage system output current, builds
Vertical distributed communication network avoids traditional energy storage group and monitors control centre for data acquisition, signal transmission, control function
The adverse effect of realization.
The nonlinearity erron controller of the present invention can allow the accurate track reference value of the actual value of energy storage group's output power,
The ability for resisting external disturbance is improved simultaneously.
It is defeated that the distribution type non-linear collaborative controller of the present invention can allow each energy-storage system to grasp all energy-storage systems
The real time information of the current reference value gone out, while can quickly and accurately realize that each energy-storage system output power meets energy storage
The requirement of group.
The present invention improves the output power reliability service ability of energy storage group, improves self sensing capability of each energy-storage system
With global monitoring ability, the intelligent level of each energy-storage system is promoted, realizes the autonomous service ability of energy storage group.
The present invention improves the active power controller ability of energy storage group as a result, and the failure for eliminating communication network can to energy storage group
By the influence of operation, influence of the energy storage group control center for the robustness of energy storage group control and communication is eliminated；Accelerate all storages
The convergence time of energy system output active power, improves the steady-state behaviour and control accuracy of energy storage group.
Description of the drawings
Fig. 1 is the control flow logic chart of the method for the present invention.
Fig. 2 is the reference value and actual value of embodiment energy storage group's output power.
Fig. 3 is the reference value and actual value of the electric current of embodiment each energy-storage system output.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment invention is further described in detail.
The reference value of the active power of step 1) the energy storage group output of the present invention is issued by control centre, and energy storage group output has
The actual value of work(power can detect to obtain at point of common coupling by ammeter, and the difference between the two passes through nonlinearity erron controller
The reference value that can be obtained all energy-storage system output currents is carried out all inside energy storage group using the reference value of the output current
The power control of energy-storage system.
The step 2) of the present invention establishes the communication network of all energy-storage systems inside connection energy storage group, which belongs to distribution
Formula communication network does not have energy storage group's monitoring center in the network, passes through the direct phase of communication line between neighbouring energy-storage system
Connect simultaneously interactive information, the reference value of each energy-storage system output current is mutually transmitted between each power supply, by rationally selecting
Communication strength factor and communication coefficient are taken, it not only can be to avoid energy storage group monitoring center for data acquisition, transmission and control
Adverse effect, and the ability of communication network reply external information interference and network attack can be improved.
The step 3) of the present invention utilizes distribution type non-linear Collaborative Control by energy storage group's distributed communication network of foundation
The electric current of all energy-storage system outputs of device real-time control, and then control the active power of each energy-storage system output, the distribution
Non-linear collaborative controller uses advanced nonlinear theory and networked control theory, can allow each energy-storage system that can slap
The real time information of the output current reference value of all energy-storage systems is held, it in this way can be to avoid the centralization control of energy storage group's monitoring center
Framework processed, and the distribution type non-linear collaborative controller has the advantages that control speed is fast, precision is high, strong robustness.
The specific embodiment implemented according to complete method of the present invention is as follows：
Emulation experiment has been carried out to energy storage group Poewr control method proposed by the present invention in MATLAB.Experiment parameter is as follows
Shown in table 1.
Table 1
Power and current waveform are detected by Scope modules, the time of dynamic process is calculated by Timer modules, is used
Control method proposed by the present invention, obtained experimental data：Pref–P<0.15kW, the actual value of the electric current of all energy-storage system outputs
Shou Lianshijian <0.3s, the Wu Cha < between the actual value and reference value of the electric current of each energy-storage system output;0.65%.
It is as follows to test sectional drawing：
(1) when the reference value of micro- energy storage group active power of output changes, the reference value of energy storage group's output power is (real
Line) and practical evaluation (dotted line), it is illustrated in fig. 2 shown below.As seen from Figure 2：Poewr control method proposed by the present invention can be protected
The summation of the active power of all energy-storage system outputs meets the requirement of dispatch command inside card energy storage group, and it is fast to have response
The high advantage of fast block, stable state accuracy.
(2) when the reference value variation of energy storage group active power of output, the actual value of the electric current of each energy-storage system output, such as
Shown in lower Fig. 3.As seen from Figure 3：Poewr control method proposed by the present invention can allow each energy-storage system according to
The instruction of control centre adjusts the actual value of itself output current, avoids the local position distribution characteristic of energy storage for power control
Adverse effect improves the stability and reliability of each energy-storage system, and then realizes effective control of each energy-storage system.
Above-mentioned specific implementation mode is used for illustrating the present invention, rather than limits the invention, the present invention's
In spirit and scope of the claims, to any modifications and changes that the present invention makes, the protection model of the present invention is both fallen within
It encloses.
The present invention improves the output power reliability service ability of energy storage group, promotes the intelligent level of each energy-storage system；
Self sensing capability and global monitoring ability of each energy-storage system are improved, realizes the autonomous service ability of energy storage group；Improve storage
The active power controller ability of energy group；Eliminate the interference of communication network failure and network attack to energy storage group's power control；It eliminates
Adverse effect of traditional energy storage group monitoring center for energy storage group communication cost and communication reliability；Accelerate energy-storage system output
The convergence rate of active power improves the stable state and dynamic property of energy storage group's power control.
Claims (5)
1. a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller, it is characterised in that：Including following
Step：
1) reference value of energy storage group's active power of output and actual value are handled to obtain all storages by nonlinearity erron controller
The reference value of the output current of energy system；
2) communication network of all energy-storage systems inside connection energy storage group is established；
3) each energy-storage system is controlled using distribution type non-linear collaborative controller.
2. a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller according to claim 1,
It is characterized in that：In the step 1), non-linear mistake that the reference value of the output current of all energy-storage systems passes through following formula
Difference controller obtains：
Wherein,For the output current reference value of i-th of energy-storage system, i=1,2 ..., n, n is the energy storage system for including in energy storage group
The quantity of system；P*, P be respectively energy storage group's active power of output reference value and actual value, e is natural Exponents, λ be adjust because
Son.
3. a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller according to claim 2,
It is characterized in that：In the step 2), for each energy-storage system inside energy storage group, which is passed through into communication line
Nearest other one or more energy-storage systems connection of Lu Yuqi actual ranges, to connect all energy-storage systems of energy storage group
It connects to form communication network, communication network is expressed as：
Wherein, C is communication matrix；εijFor communication strength factor；cijTo communicate coefficient, 0<cij<1 indicate j-th energy-storage system with
I-th of energy-storage system is connected, cij=0 j-th of power supply of expression is not connected with i-th of power supply；I and j is represented in energy storage group
The ordinal number of portion's energy-storage system, i, j=1,2 ..., n；Ln represents natural logrithm operation.
4. a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller according to claim 1,
It is characterized in that：In the step 3), the expression formula of distribution type non-linear collaborative controller is：
Wherein, uiFor the controlled quentity controlled variable of the energy storage output power of i-th of energy-storage system；For the output current ginseng of i-th of energy-storage system
Examine the first derivative of value；Tanh () is hyperbolic tangent function；eiFor the output current reference value and output electricity of i-th of energy-storage system
The difference of actual value is flowed,ejFor the difference of the output current reference value and output current actual value of j-th of energy-storage system, For the output current reference value of i-th, j-th energy-storage system, xi、xjRespectively i-th, j-th
The output current current actual value of energy-storage system；Sin is SIN function.
5. a kind of energy storage group's Poewr control method based on distribution type non-linear collaborative controller according to claim 1,
It is characterized in that：Each energy-storage system is controlled using distribution type non-linear collaborative controller in the step 3), makes to own
The actual value of the output current of energy-storage system levels off to reference value.
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