CN105226689A - Consider polymorphic type energy-storage system energy management method and the system of operation and maintenance - Google Patents

Consider polymorphic type energy-storage system energy management method and the system of operation and maintenance Download PDF

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CN105226689A
CN105226689A CN201510674350.0A CN201510674350A CN105226689A CN 105226689 A CN105226689 A CN 105226689A CN 201510674350 A CN201510674350 A CN 201510674350A CN 105226689 A CN105226689 A CN 105226689A
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energy
storage
power
state
charge
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CN201510674350.0A
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李相俊
曹超
武国良
王立业
惠东
王松岑
郑高
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中国电力科学研究院
国家电网公司
国网福建省电力有限公司
国网福建省电力有限公司电力科学研究院
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    • 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
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    • 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]

Abstract

The invention provides the polymorphic type energy-storage system energy management method and system of considering operation and maintenance, described method comprises: the related data reading wind-light storage electricity generation system and battery energy storage system; The filter order fiducial value that normalized modulus cumulative mean value draws, resolves into high frequency, intermediate frequency and low frequency signal by power signal; Ask for current time energy-storage system active power and state-of-charge, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power; Judge the charging and discharging state of energy-storage system according to the symbol of energy-storage system active power, and calculate the active power bid value of each energy-storage battery unit based on energy-storage system charging and discharging state; In real time charge and discharge control is carried out to energy-storage system.The present invention reaches and can prevent energy-storage system from occurring overcharging and crossing putting phenomenon, keeps energy-storage system superperformance.

Description

Consider polymorphic type energy-storage system energy management method and the system of operation and maintenance

Technical field

The present invention relates to energy storage technology, the energy management method in intelligent grid and energy internet arena and system, be specifically related to a kind of polymorphic type energy-storage system energy management method and the system of considering operation and maintenance.

Background technology

Along with new forms of energy large-scale grid connection, its fluctuation problem of exerting oneself is day by day serious.Because wind-powered electricity generation and photovoltaic belong to regenerative resource, its size of exerting oneself is subject to the impact of the factors such as weather, landform, temperature, sunshine, cause the uncertainty that it is exerted oneself, but the stochastic volatility that wind energy is intrinsic, new forms of energy can be produced partial electric grid when grid-connected obviously impact, time serious, extensive serious accident can be caused.Along with wind-powered electricity generation and grid-connected ratio in electrical network constantly increase, polymorphic type energy-storage system energy management method and systems grow receive publicity.

Along with the development of battery and integrated technology thereof, the level and smooth new forms of energy of application energy-storage system export and become a kind of feasible program gradually.The two way convertor on energy storage device is connected to by conservative control, realize energy-storage system discharge and recharge efficiently, the problem of the output instability that wind-powered electricity generation and photovoltaic randomness and fluctuation bring can be solved to a great extent, to meet the level and smooth output requirement of wind-light storage generating, and effectively solve because new forms of energy fluctuate the problems such as the quality of power supply brought that to fluctuate to mains frequency.

According to the character that they are different, energy-accumulating medium can be divided into energy type and power-type two class, and energy type energy-accumulating medium is with lithium battery, lead acid accumulator and full alum flow battery etc. for representative, and its energy density is large, memory capacity is high, but power density is less and the response time is longer.Power-type energy-accumulating medium is with super capacitor, flywheel energy storage and super conductive magnetic storage energy for representative, and its power density is large, and memory capacity is low, and the response time is shorter, can frequently discharge and recharge and do not damage its performance, but energy density is less.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the polymorphic type energy-storage system energy management method and system of considering operation and maintenance.The present invention is based on the method for empirical mode decomposition, in conjunction with energy-storage system SOC feed back input, reach and can prevent energy-storage system from occurring overcharging and crossing putting phenomenon, keep energy-storage system superperformance, have again the level and smooth effect exported preferably concurrently.

In order to realize foregoing invention object, the present invention takes following technical scheme:

Consider a polymorphic type energy-storage system energy management method for operation and maintenance, described method comprises the steps:

(1) related data of wind-light storage electricity generation system and battery energy storage system is read;

(2) the filter order fiducial value that draws of normalized modulus cumulative mean value, resolves into high frequency, intermediate frequency and low frequency signal by power signal;

(3) current time energy-storage system active power and state-of-charge is asked for, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power;

(4) judge the charging and discharging state of energy-storage system according to the symbol of energy-storage system active power, and calculate the active power bid value of each energy-storage battery unit based on energy-storage system charging and discharging state;

Preferably, in described step (1), described related data comprises the initialization state-of-charge of the sampled power of wind-light storage electricity generation system, time interval of sampled power, rated power, rated capacity and energy-type cells and power type battery.

Preferably, in described step (2), comprise the steps:

Step 2-1, sampled power according to described wind-light storage electricity generation system, based on the method for empirical mode decomposition, be divided into several intrinsic mode functions and a surplus;

Step 2-2, according to its normalized modulus cumulative mean value of following formulae discovery, thus the filter order fiducial value k1 drawn and k2:

h m ‾ = m e a n ( Σ i = 1 m h i ( t ) - m e a n ( h i ( t ) ) s t d ( h i ( t ) ) ) , 1 ≤ m ≤ n

In formula, Mean () refers to mean value, std () standard deviation, and n is maximum order for normalized modulus cumulative mean value, h it () is intrinsic mode function, when time, σ=5, think that empirical mode decomposition trend changes from m rank, and k1 is m; When be maximum on the n-th rank, k2 is n;

Step 2-3, all IMF sums after k1 rank are added that the low frequency part of surplus is as smooth power, the IMF sum from the 1st rank to kth 2 rank is HFS, has power type battery to absorb; K2+1 rank, are absorbed by energy-type cells to the IMF sum on k1-1 rank as intermediate-frequency section.

Preferably, in described step (3), described energy-storage system active power comprises energy energy-type cells active power and power type battery active power, asks for energy-type cells active power formula described in current time as follows:

P b a t ( t ) = Σ i = k 2 k 1 - 1 h i ( t )

Ask for described power type battery active power formula as follows:

P c a p ( t ) = Σ 1 k 1 h i ( t )

Described energy-storage system state-of-charge comprises energy-type cells state-of-charge and power type battery state-of-charge, asks for described energy-type cells state-of-charge formula as follows:

SOC bat(t)=SOC bat(t-Δt)+P bat(t)*Δt/C bat

Ask for described power type battery state-of-charge formula as follows:

SOC cap(t)=SOC cap(t-Δt)+P cat(t)*Δt/C cap

In formula, P batt () is the active power of current t energy-type cells, C batfor the capacity of energy-type cells, P capt () is the active power of the power type battery of current t, C capfor the capacity of power type battery, Δ t is the sampled power time interval;

When judging that energy-storage system is in overcharge or over-discharge state, revise energy-storage system power command value in real time based on following formula:

ΔP BESS=ArP bat

r = SOC r e f - S O C ( SOC m a x - SOC m i n ) / 2

SOC r e f = 0.2 i f S O C < 0.2 0.8 i f S O C > 0.8 S O C o t h e r w i s e

P in formula batfor energy storage target power value after empirical mode decomposition; A is target power value correction factor, r based on the adaptive correction coefficient of charge state feedback, Δ P bESSfor energy-storage system power command correction value; SOC refwith reference to SOC, SOC maxstate-of-charge maximum, SOC minstate-of-charge minimum value, SOC is the state-of-charge of energy-storage system.

Preferably, in described step (4), comprise the steps:

If the active power symbol of step 4-1 energy-storage system is negative, represent that energy-storage system is in charge operation state;

If the active power symbol of step 4-2 energy-storage system is just, represent that energy-storage system is in electric discharge running status;

Step 4-3, judge the state of energy-storage system, when being in running status, u i=1; When being in inspecting state, u i=2, when being in halted state, u i=0;

Step 4-4, calculate the active power bid value of each energy-storage battery unit based on energy-storage system state-of-charge;

P i = u i SOD i &Sigma; i = l L ( u i SOD i ) P b

P in formula ifor the active power bid value of energy-storage battery unit, u istate residing for energy-storage battery; SOD ifor discharge condition value, P bfor energy storage substation total power value, L represents the number of energy-storage battery unit, and i represents i-th energy-storage battery unit.

Preferably, a kind of polymorphic type energy-storage system EMS considering operation and maintenance, described system comprises:

Communication module, for reading the related data of wind-light storage electricity generation system and battery energy storage system, and sending to battery management system by the symbol of described energy-storage system active power and the instruction of described energy-storage system, carrying out charge and discharge control in real time to energy-storage system;

Data store and management module, real time data when running for storage batteries associating energy-accumulating power station and historical data, and the filter order fiducial value that normalized modulus cumulative mean value draws, resolve into high frequency, intermediate frequency and low frequency signal by power signal;

Gross power coordinating control module, for asking for current time energy-storage system active power and state-of-charge, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power;

Realtime power distribution module, judges the charging and discharging state of energy-storage system according to the symbol of energy-storage system active power, and arranges the instruction of energy-storage system according to energy-storage system charging and discharging state.

Compared with prior art, beneficial effect of the present invention is:

The present invention is based on the method for empirical mode decomposition, power signal is resolved into high frequency, intermediate frequency, low frequency signal.Low frequency signal in conjunction with energy-storage system SOC feed back input as grid-connected power, regulates energy-storage system power, reaches and can prevent energy-storage system from occurring overcharging and crossing putting phenomenon, keeps energy-storage system superperformance, has again the level and smooth effect exported preferably concurrently.Meanwhile, polymorphic type energy-storage system energy management method and system consider the state of battery, are respectively running status, maintenance state, halted state.Different discharge and recharge strategies is adjusted for the state that battery is different, makes corresponding decision-making.Be conducive to energy-storage battery safeguard for a long time and use.

Accompanying drawing explanation

Fig. 1 is the structure chart of a kind of polymorphic type energy-storage system EMS provided by the invention

Fig. 2 is the flow chart of a kind of polymorphic type energy-storage system energy management method provided by the invention

The data and curves figure of Fig. 3 wind-light storage electricity generation system provided by the invention sampled power;

The data and curves figure of the power of battery under Fig. 4 inspecting state provided by the invention;

Fig. 5 stabilizes front and back power;

Fig. 6 energy-type cells power;

Fig. 7 power type battery power;

Fig. 8 energy-type cells SOC change curve;

Fig. 9 power type battery SOC change curve

Figure 10 reserve battery power

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Battery associating energy-accumulating power station comprises power-type energy storage substation and energy type energy storage substation, and wherein there are again operation and maintenance two states in energy type substation.Wherein power-type and energy type substation comprise two way convertor and multiple battery energy storage unit, can be performed on off control and the charge-discharge electric power instruction of each battery energy storage unit by two way convertor.

As shown in Figure 1, the present invention is by being arranged on the communication module 10 of remote server, data storage and management module 20, gross power coordinating control module 30, and realtime power distribution module 40 realizes.

Communication module 10 receives battery energy storage power station total active power real-time requirement value service data relevant with energy storage;

Real time data when data storage and management module 20 is run for store and management battery associating energy-accumulating power station and historical data, and be responsible for each power command value to carry out gathering and assignment to relevant interface variables, called by communication module for remote server, each energy type and power type battery unit controllable state signal and SOC value signal and battery energy storage power station total active power real-time requirement signal value are sent to gross power coordinating control module 30.

Energy type and power-type energy storage substation active power demand for calculating active power bid value in battery energy storage power station in real time, and are sent to realtime power distribution module 40 by gross power coordinating control module 30.

Realtime power distribution module 40 for distributing in real time the active power of energy type energy storage substation and power-type energy storage substation, to determine the active power bid value of energy type to be allocated and power-type energy storage unit.Each energy type and power type battery power of the assembling unit bid value signal are sent it back gross power coordinated management module 30.

As shown in Figure 2, the polymorphic type energy management method of consideration operation and maintenance provided by the invention, the method comprises the steps:

Steps A: the related data reading wind-light storage electricity generation system and battery energy storage system

These data comprise the initial state-of-charge of the sampled power of wind-light storage system, the sampled power time interval, rated power and rated capacity and energy-type cells and power type battery

Step B: the filter order fiducial value that normalized modulus cumulative mean value draws, resolves into high frequency, intermediate frequency and low frequency signal by power signal

That reads according to communication module goes out force value, based on the method for empirical mode decomposition (EMD), is divided into several IMF and surplus, calculates by following formula filter order fiducial value k1, the k2 that its normalized modulus cumulative mean value draws:

h m &OverBar; = m e a n ( &Sigma; i = 1 m h i ( t ) - m e a n ( h i ( t ) ) s t d ( h i ( t ) ) ) , 1 &le; m &le; n - - - ( 1 )

In formula (1) for standard volume cumulative mean value, h it () is intrinsic mode function, Mean () refers to mean value, std () standard deviation, and n is maximum order, when when obviously departing from 0, namely σ=5, think that EMD trend changes from m rank, and k1 is m.When be maximum on the n-th rank, k2 is n.

Step C: ask for current time energy-storage system active power and state-of-charge, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power;

The active power of energy-type cells and power type battery is asked for by following formula:

(1) active power of energy-type cells:

P b a t ( t ) = &Sigma; i = k 2 k 1 - 1 h i ( t ) - - - ( 2 )

(2) active power of power type battery:

P c a p ( t ) = &Sigma; 1 k 1 h i ( t ) - - - ( 3 )

The state-of-charge of current time energy-type cells and power type battery is asked for by following formula;

(3) state-of-charge of energy-type cells:

SOC bat(t)=SOC bat(t-Δt)+P bat(t)*Δt/C bat(4)

(4) state-of-charge of power type battery:

SOC cap(t)=SOC cap(t-Δt)+P cat(t)*Δt/C cap(5)

P in formula (3)-(5) batt () is the active power of current t energy-type cells, C batfor the capacity of energy-type cells, P capt () is the active power of the power type battery of current t, C capfor the capacity of power type battery, Δ t is the sampled power time interval.

(5) when judging that energy-storage system is in overcharge or over-discharge state, energy-storage battery power command value is revised in real time based on following formula:

ΔP BESS=ArP bat(6)

r = SOC r e f - S O C ( SOC m a x - SOC m i n ) / 2 - - - ( 7 )

SOC r e f = 0.2 i f S O C < 0.2 0.8 i f S O C > 0.8 S O C o t h e r w i s e - - - ( 8 )

P in formula (6)-(8) batenergy storage target power value after EMD decomposes; A is target power value correction factor.R is based on the adaptive correction coefficient of charge state feedback; SOC refwith reference to SOC.

(6) the adaptive correction amount Δ P of above formula energy-storage system charge-discharge electric power bESSdetermined by following formula, namely first based on while empirical mode decomposition flat volatility, by monitoring energy-storage system state-of-charge in real time; When the scope that SOC sets beyond us, the strategy that the present invention proposes is, regulates Δ P in real time according to the energy-storage system SOC of current feedback, energy-storage system actual power value bESS.The target power value of on-line amending energy-storage system in this way, is absorbed by reserve battery and discharges, within the scope of energy-storage system is operated in SOC that we expect.

Step D: the charging and discharging state judging energy-storage system according to the symbol of energy-storage system active power, and the instruction that energy-storage system is set according to energy-storage system charging and discharging state

Judge the state of energy-type cells

(1) running status is in, u i=1; Be in inspecting state, u i=2; Be in halted state, u i=0; When battery is in running status, maintenance battery is in off position; When battery is in inspecting state, N platform maintenance energy-storage battery unit is worked; When battery is in halted state, all energy-type cells quit work;

(2) if the active power of power type battery and energy-type cells is negative, represent that energy-storage system is in charged state, then-1 is set to the instruction of battery energy storage system;

(3) the active power bid value of each energy-storage battery unit is then calculated based on energy-storage battery state-of-charge;

P i = u i SOD i &Sigma; i = l L ( u i SOD i ) P b - - - ( 9 )

Wherein u istate residing for energy-storage battery; SOD ifor discharge condition value, P bfor energy storage substation total power value, L represents the number of PCS, and i is i-th PCS;

(4) if the active power symbol of power type battery and energy-type cells is just, represent that energy-storage system is in discharge condition, then 1 is set to the instruction of battery energy storage system;

(5) the active power bid value of each energy-storage battery unit is then calculated based on energy-storage battery state-of-charge;

P i = u i SOC i &Sigma; i = l L ( u i SOC i ) P b - - -

Wherein u istate residing for energy-storage battery; SOC ifor SOC, P bfor energy storage substation total power value; L represents the number of PCS, and i is i-th PCS;

The wind energy turbine set being 80MW for certain installed capacity actual operating data year one day, as shown in Figure 3, the sampling interval is 1min to original wind power curve, and total number of sampling is 1440.Calculate that the filter order fiducial value k1 that its normalized modulus cumulative mean value draws is 6, k2 is 3.Power type battery capacity be configured to 2MW/0.5MWh.Energy-type cells be configured to 9MW/36MWh.During maintenance, energy-type cells capacity configuration is 3MW/8MWh.Reserve battery capacity configuration is 6MW/9MWh.The energy-type cells SOC upper limit is 0.8, and lower limit is 0.2.The SOC upper limit of power type battery is 0.95, and lower limit is 0.05.

Under inspecting state provided by the invention, the data and curves of energy-storage battery power as shown in Figure 4.As shown in Figure 4, maintenance battery energy storage unit is in three state, namely charges, discharges, halted state.Based on the control strategy that the present invention proposes, the level and smooth control effects of the wind storing cogeneration of realization as shown in Figure 5.In order to realize level and smooth control effects as shown in Figure 5, as shown in Figure 6, as shown in Figure 7, as shown in Figure 8, energy-type cells SOC change curve as shown in Figure 9 for power type battery SOC change curve for energy-type cells changed power curve for power type battery changed power curve.Reserve battery power curve as shown in Figure 10.Known, while the control method proposed based on the present invention and system can effectively realize smoothly going out fluctuation, energy-storage system SOC is controlled in the reasonable scope, and the coordination optimization achieving power-type and energy type two kinds of energy-storage battery power controls.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.

Claims (6)

1. consider a polymorphic type energy-storage system energy management method for operation and maintenance, it is characterized in that, described method comprises the steps:
(1) related data of wind-light storage electricity generation system and battery energy storage system is read;
(2) the filter order fiducial value that draws of normalized modulus cumulative mean value, resolves into high frequency, intermediate frequency and low frequency signal by power signal;
(3) current time energy-storage system active power and state-of-charge is asked for, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power;
(4) judge the charging and discharging state of energy-storage system according to the symbol of energy-storage system active power, and calculate the active power bid value of each energy-storage battery unit based on energy-storage system charging and discharging state.
2. method according to claim 1, it is characterized in that, in described step (1), described related data comprises the initialization state-of-charge of the sampled power of wind-light storage electricity generation system, time interval of sampled power, rated power, rated capacity and energy-type cells and power type battery.
3. method according to claim 2, is characterized in that, in described step (2), comprise the steps:
Step 2-1, sampled power according to described wind-light storage electricity generation system, based on the method for empirical mode decomposition, be divided into several intrinsic mode functions and a surplus;
Step 2-2, according to its normalized modulus cumulative mean value of following formulae discovery, thus the filter order fiducial value k1 drawn and k2:
In formula, Mean () refers to mean value, std () standard deviation, and n is maximum order, for normalized modulus cumulative mean value, h it () is intrinsic mode function, when time, σ=5, think that empirical mode decomposition trend changes from m rank, and k1 is m; When be maximum on the n-th rank, k2 is n;
Step 2-3, all IMF sums after k1 rank are added that the low frequency part of surplus is as smooth power, the IMF sum from the 1st rank to kth 2 rank is HFS, has power type battery to absorb; K2+1 rank, are absorbed by energy-type cells to the IMF sum on k1-1 rank as intermediate-frequency section.
4. method according to claim 1, it is characterized in that, in described step (3), described energy-storage system active power comprises energy energy-type cells active power and power type battery active power, asks for energy-type cells active power formula described in current time as follows:
Ask for described power type battery active power formula as follows:
Described energy-storage system state-of-charge comprises energy-type cells state-of-charge and power type battery state-of-charge, asks for described energy-type cells state-of-charge formula as follows:
SOC bat(t)=SOC bat(t-Δt)+P bat(t)*Δt/C bat
Ask for described power type battery state-of-charge formula as follows:
SOC cap(t)=SOC cap(t-Δt)+P cat(t)*Δt/C cap
In formula, P batt () is the active power of current t energy-type cells, C batfor the capacity of energy-type cells, P capt () is the active power of the power type battery of current t, C capfor the capacity of power type battery, Δ t is the sampled power time interval;
When judging that energy-storage system is in overcharge or over-discharge state, revise energy-storage system power command value in real time based on following formula:
ΔP BESS=ArP bat
P in formula batfor energy storage target power value after empirical mode decomposition; A is target power value correction factor, r based on the adaptive correction coefficient of charge state feedback, Δ P bESSfor energy-storage system power command correction value; SOC refwith reference to SOC, SOC maxstate-of-charge maximum, SOC minstate-of-charge minimum value, SOC is the state-of-charge of energy-storage system.
5. method according to claim 1, is characterized in that, in described step (4), comprise the steps:
If the active power symbol of step 4-1 energy-storage system is negative, represent that energy-storage system is in charge operation state;
If the active power symbol of step 4-2 energy-storage system is just, represent that energy-storage system is in electric discharge running status;
Step 4-3, judge the state of energy-storage system, when being in running status, u i=1; When being in inspecting state, u i=2, when being in halted state, u i=0;
Step 4-4, calculate the active power bid value of each energy-storage battery unit based on energy-storage system state-of-charge;
P in formula ifor the active power bid value of energy-storage battery unit, u istate residing for energy-storage battery; SOD ifor discharge condition value, P bfor energy storage substation total power value, L represents the number of energy-storage battery unit, and i represents i-th energy-storage battery unit.
6. consider a polymorphic type energy-storage system EMS for operation and maintenance, it is characterized in that, described system comprises:
Communication module, for reading the related data of wind-light storage electricity generation system and battery energy storage system, and sending to battery management system by the symbol of described energy-storage system active power and the instruction of described energy-storage system, carrying out charge and discharge control in real time to energy-storage system;
Data store and management module, real time data when running for storage batteries associating energy-accumulating power station and historical data, and the filter order fiducial value that normalized modulus cumulative mean value draws, resolve into high frequency, intermediate frequency and low frequency signal by power signal;
Gross power coordinating control module, for asking for current time energy-storage system active power and state-of-charge, and judge whether the state-of-charge of current time energy-storage system exceedes preset value, if exceed, then stop power smooth controlling, otherwise revise energy-storage system power command value in real time according to the state-of-charge of energy-storage system and actual power;
Realtime power distribution module, judges the charging and discharging state of energy-storage system according to the symbol of energy-storage system active power, and arranges the instruction of energy-storage system according to energy-storage system charging and discharging state.
CN201510674350.0A 2015-10-16 2015-10-16 Consider polymorphic type energy-storage system energy management method and the system of operation and maintenance CN105226689A (en)

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