CN110242485A - Distributed energy storage control coordination system - Google Patents
Distributed energy storage control coordination system Download PDFInfo
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- CN110242485A CN110242485A CN201910529343.XA CN201910529343A CN110242485A CN 110242485 A CN110242485 A CN 110242485A CN 201910529343 A CN201910529343 A CN 201910529343A CN 110242485 A CN110242485 A CN 110242485A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 35
- 230000005611 electricity Effects 0.000 claims abstract description 92
- 238000010248 power generation Methods 0.000 claims abstract description 65
- 238000000151 deposition Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 127
- 230000006870 function Effects 0.000 claims description 33
- 238000012546 transfer Methods 0.000 claims description 30
- 238000005070 sampling Methods 0.000 claims description 25
- 238000010586 diagram Methods 0.000 claims description 21
- 239000003651 drinking water Substances 0.000 claims description 10
- 235000020188 drinking water Nutrition 0.000 claims description 10
- 230000002045 lasting effect Effects 0.000 claims description 3
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- 230000006641 stabilisation Effects 0.000 claims 1
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- 238000000844 transformation Methods 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
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- 238000010168 coupling process Methods 0.000 description 2
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- 208000033748 Device issues Diseases 0.000 description 1
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- 230000015572 biosynthetic process Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
-
- 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
- H02J15/00—Systems for storing electric energy
-
- 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
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Power Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses distributed energy storage control coordination systems.Belong to power generation power supply technique field, in a part of electricity storage to energy-storage battery group that pumped-storage power generation station is issued, and control generating efficiency is gone with electricity is deposited, so that the electrical stability of pumped-storage power generation station is good.Including wireless module, memory, energy storage control monitor supervision platform, power supply network, several power units being connected on power supply network and several different location be set and be respectively equipped with the pumped-storage power generation station of controller, further include depositing electricity control generating efficiency policy module；The electricity that corresponding pumped-storage power generation station issues independently is transported on power supply network by a grid-connecting apparatus by each pumped-storage power generation station.Electricity control generating efficiency policy module, wireless module and memory is deposited to be connected with controller respectively；Controller controls monitor supervision platform with energy storage by wireless module and is connected.
Description
Technical field
The present invention relates to power generation power supply technique field more particularly to distributed energy storage control coordination systems.
Background technique
The electricity that pumped-storage power generation station issues at present is typically all directly to be transported to the electricity that pumped-storage power generation station issues
On power supply network, not with deposit electricity go control generating efficiency, cause the electrical stability of pumped-storage power generation station poor.
Summary of the invention
It is typically all to pass through grid-connecting apparatus directly will that the present invention, which is to solve the electricity that existing pumped-storage power generation station issues,
Pumped-storage power generation station issue electricity be transported on power supply network, not with deposit electricity go control generating efficiency, lead to water-storage
The poor deficiency of the electrical stability in power station, provides a kind of good reliability, a part of electricity that pumped-storage power generation station is issued
It stores in energy-storage battery group, and go control generating efficiency with electricity is deposited, so that the powered stable of pumped-storage power generation station
The good distributed energy storage control coordination system of property.
The above technical problem is solved through the following technical scheme:
Distributed energy storage control coordination system, if including energy storage control monitor supervision platform, power supply network, being connected on power supply network
The pumped-storage power generation station of different location is arranged in several in dry power unit；Pumped-storage power generation station includes reservoir, water
Turbine and both ends are connected on reservoir water outlet respectively and on the water inlet of the hydraulic turbine and the water of reservoir can be guided to water
The pipeline of turbine；Wireless module is further respectively had in pumped-storage power generation station, is deposited electricity control generating efficiency policy module, is deposited
Reservoir, grid-connecting apparatus and controller；Grid-connecting apparatus includes the No.1 transformer being connected respectively with controller, No.1 voltage sample
Circuit, switch K1, charger, energy-storage battery group, switch K2, inverter, filter, No. two transformers, No. two voltage sample electricity
Road, switch K3 and No. three voltage sampling circuits；The input terminal of No.1 transformer and the input terminal of charger are both connected to the storage that draws water
On the power output end in energy power station；The output end of No.1 transformer and the collection terminal of No.1 voltage sampling circuit are both connected to out
One end of K1 is closed, the other end of switch K1 is connected on power supply network；The charging end of energy-storage battery group and the output end of charger connect
It connects, the both ends of switch K3 are connected to the discharge end of energy-storage battery group and the input terminal of inverter, and the output end of inverter connects
The input terminal in filter is connect, the output end of filter is connected to the input terminal of No. two transformers, the output end of No. two transformers
One end of switch K2 is both connected to the sampling end of No. two voltage sampling circuits, the other end of switch K2 is connected on power supply network；
The sampling end of No. three voltage sampling circuits is connected on power supply network；Deposit electricity control generating efficiency policy module, wireless module and
Memory is connected with controller respectively；Controller controls monitor supervision platform with energy storage by wireless module and is connected.
With network monitoring, good reliability, energy-storage battery group is arrived in a part of electricity storage that pumped-storage power generation station is issued
On, and control generating efficiency is gone with electricity is deposited, so that the electrical stability of pumped-storage power generation station is good.
Preferably, pumped-storage power generation station further includes lower pond, transfer pond, is equipped with lower suction pump and can be by lower pond
The lower drinking-water pipe that is extracted into transfer pond of water and equipped with upper suction pump and the water in transfer pond can be extracted into reservoir on draw water
Pipe；And transfer pond is arranged between reservoir and lower pond；The reservoir level that can detect reservoir level height is equipped in reservoir
Sensor is equipped with the transfer water level sensor that can detect transfer pool water level height in transfer pond；The upper down tube of lower drinking-water pipe
Mouth is arranged in the upper and lower pond in pond mouthful in transfer pond, and the upper lower nozzle of upper drinking-water pipe is arranged on the Chi Kou of reservoir
In transfer pond；Reservoir level sensor, transfer water level sensor, the control terminal of upper suction pump and lower suction pump control terminal
It is connected respectively with controller.The water gone out from the hydraulic turbine is introduced into down in pond by a drainpipe.
Upper suction pump and under draw water and the water in lower pond can be pumped into reservoir China after pump startup and recycle.Reservoir
Water the hydraulic turbine of pumped-storage power generation station is introduced by pipeline.
Preferably, the electricity of depositing for depositing electricity control generating efficiency policy module controls generating efficiency optimal policy reality
Existing method is as follows:
Since the generating efficiency of pumped-storage power generation station needs to stablize in preset horizontal extent just with electricity is deposited
It is able to satisfy the lasting generating function of pumped-storage power generation station；If sell electricity be can Accurate Prediction, can be according to depositing electricity control
Generating efficiency strategy:
Optimum control function is obtained first；
Clocking and carving the electricity of depositing of t is x (t), the generated energy of unit time and to sell electricity be respectively u (t) and v (t), then they
Meet
Wherein v (t) is known function,
It preset Generation Rate and deposits electricity and is denoted as u respectively0And x0, make Generation Rate u (t) and deposit electricity x (t) and divide as far as possible
It is unstable in u0And x0Level on, obtain quadratic model object function after seeking control function u (t)
Reach minimum value, wherein T is any given time,It is weighted factor, for adjusting, u (t) is stable and x (t) is steady
Fixed significance level between the two, and application has the dimension of time inverse；
Depositing electricity x (t) in (1), (2) is function of state, deposited when might as well set t=0 and t=T for the sake of determination electricity as
Zero, i.e. fixed endpoint condition
X (0)=0, x (T)=0 (3)
In addition, actually to Generation Rate and deposit electricity all can Prescribed Properties limit, which is denoted as
0≤u(t)≤um, 0≤x (t)≤xm (4)
Ask u (t) that the functional F of (2) formula is made to reach minimum value under constraint condition (1), (3), (4)；
U (t) is solved from (1) formula and substitutes into (2) formula, and is write as the functional of x (t)
Put aside condition (4), then (3), (5) constitute an intrinsic endpoint functional extreme-value problem, solved with political reform
(1) is substituted into again after most being had solution x (t), can be obtained optimum control function；
Then control amount u can be determined according to the state x for being easy to observe；
To simplify solution procedure, if selling electricity is known constant, i.e.,
V (t)=v0 (6)
(5) formula is substituted into (6), can obtain optimal solution x (t) according to Eulerian equation should meet equation
I.e.
Solution of the equation (7) under end-point condition (3) be
(8) substitution (1) formula is obtained
(8) and (9) are respectively optimum state function and optimum control function；
It is obtained by (8), (9) two formulas
T → ∞ is enabled, then to arbitrary finite t, last goes to zero above formula right end, then has
Above-mentioned (11) formula shows that Generation Rate control function u can be directly determined according to depositing state of charge x, without regard to when
Between independent variable t, and u reduces when x increases, and this control mode is known as state negative-feedback, and the state negative-feedback is according to being easy to
The state x of observation can determine control amount u；
Finally to obtain the optimal solution of the former problem of constraint condition (4)；
It investigates constraint condition (4), (8), (9) two formulas can be expressed as again using hyperbolic functions
The schematic diagram of optimal solution x (t) He u (t) are drawn according to (12), (13) formula, and can be seen that from the schematic diagram, as long as
xm≥x0, just there is 0≤x (t)≤xm, i.e. x (t) meets condition (4)；And the parameter x providedmAnd x0Nature should have xm≥x0, separately
On the one hand, because
As long as so u (0)≤um, u (T) >=0 just has 0≤u (t)≤um, (8), (9) two formulas provide in such a situa-tion
X (t), u (t) also allow for constraint condition (4) former problem optimal solution；Electricity control power generation effect is deposited to can be obtained
The optimal policy of rate.
Sell electricity can preset or can Accurate Prediction, sell power quantity predicting exact value and can sell electric data according to history and obtain
Out.In a part of electricity storage to energy-storage battery group that this programme issues pumped-storage power generation station, and control is gone to send out with electricity is deposited
Electrical efficiency, so that the electrical stability of pumped-storage power generation station is good.
The present invention can reach following effect:
The present invention has network monitoring, good reliability, and energy storage is arrived in a part of electricity storage that pumped-storage power generation station is issued
In battery pack, and control generating efficiency is gone with electricity is deposited, so that the electrical stability of pumped-storage power generation station is good.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of circuit principle connecting structure of the embodiment of the present invention.
Fig. 2 is a kind of attachment structure schematic diagram of pumped-storage power generation station of the embodiment of the present invention.
Fig. 3 is a kind of schematic diagram of optimal solution x (t) of the embodiment of the present invention.
Fig. 4 is a kind of schematic diagram of optimal solution u (t) of the embodiment of the present invention.
Fig. 5 is that a kind of vertical view at reservoir of embodiment of the present invention inner circle ring flat-plate amplifies attachment structure schematic diagram
Fig. 6 is that attachment structure schematic diagram is amplified in a kind of side view in reservoir of the embodiment of the present invention at pressure plare.
Fig. 7 is that the sump of pumped-storage power generation station of the embodiment of the present invention is arranged in a kind of connection knot on No. two pipes of pipeline
Structure schematic diagram.
Fig. 8 is that a kind of amplification connection structure that the oscillation of pumped-storage power generation station of the embodiment of the present invention is eliminated at vertical pipe is shown
It is intended to.
Fig. 9 is that the Pipeline Water Hammer of pumped-storage power generation station of the embodiment of the present invention destroys a kind of section reduced at policy device
Attachment structure schematic diagram.
Figure 10 is a kind of section attachment structure schematic diagram in reservoir of the embodiment of the present invention at water inlet cover.
Figure 11 is that the analog signal of the embodiment of the present invention inputs a kind of circuit diagram of conditioning circuit.
Figure 12 is a kind of circuit diagram of the combination switch of the embodiment of the present invention.
Figure 13 is a kind of attachment structure schematic diagram when having water in pumped-storage power generation station of embodiment of the present invention pipeline.
Figure 14 is a kind of attachment structure schematic diagram at regulator of the embodiment of the present invention.
Figure 15 is the silt of reservoir of embodiment of the present invention bottom surface also than shallower, and pressure plare is not pressed on silt also, and No. two perpendicular
A kind of use state attachment structure schematic diagram when straight tube does not also stretch high upwards.
Figure 16 is that the silt of reservoir of embodiment of the present invention bottom surface is relatively high, and pressure plare has been pressed against on silt,
A kind of use state attachment structure schematic diagram when No. two vertical pipes stretch high upwards.
Figure 17 is a kind of overlooking the connection structure at the closed sliding block vertical holes of the embodiment of the present invention.
Specific embodiment
The present invention will be further described below with reference to the accompanying drawings and embodiments.
Embodiment, distributed energy storage control coordination system, referring to shown in Fig. 1-17.
If including energy storage control monitor supervision platform 15, power supply network 14, several power units 13 being connected on power supply network and
Dry is arranged in the pumped-storage power generation station 1 of different location；Pumped-storage power generation station includes reservoir 38, the hydraulic turbine 35 and two
End be connected on reservoir water outlet 41 respectively and the water inlet 42 of the hydraulic turbine on and the water 98 of reservoir can be guided to the hydraulic turbine
Pipeline 40；Further respectively had in pumped-storage power generation station wireless module 16, deposit electricity control generating efficiency policy module 17,
Memory 18, grid-connecting apparatus 2 and controller 12；Grid-connecting apparatus includes the No.1 transformer 3 being connected respectively with controller, No.1
Voltage sampling circuit 4, switch K1, charger 5, energy-storage battery group 6, switch K2, inverter 7,8, No. two transformers 9 of filter,
No. two voltage sampling circuits 10, switch K3 and No. three voltage sampling circuits 11；The input terminal of No.1 transformer and charger it is defeated
Enter end to be both connected on the power output end of pumped-storage power generation station；The output end and No.1 voltage sampling circuit of No.1 transformer
Collection terminal be both connected to one end of switch K1, the other end of switch K1 is connected on power supply network；The charging end of energy-storage battery group
It is connect with the output end of charger, the both ends of switch K3 are connected to the input of the discharge end and inverter of energy-storage battery group
End, the output end of inverter are connected to the input terminal of filter, and the output end of filter is connected to the input terminal of No. two transformers,
The output end of No. two transformers and the sampling end of No. two voltage sampling circuits are both connected to one end of switch K2, and switch K2's is another
End is connected on power supply network；The sampling end of No. three voltage sampling circuits is connected on power supply network；Deposit electricity control generating efficiency plan
Slightly module, wireless module and memory are connected with controller respectively；Controller is flat by wireless module and energy storage control monitoring
Platform is connected.
The switch K1 and pass K2 is a kind of combination switch of accurate operating passing zero of energy.It is shown in Figure 12.
The combination switch includes 701, No. two nodes 702, reverse-blocking tetrode thyristor K of No.1 nodeb, magnetic latching relay switch Kc、
Node Ma, inductance La, node Mb, capacitor Ca, diode D1, diode D2, diode D3, diode D4, capacitor C0, photoelectric coupling
Device OPT, resistance R0, from electricity consumption power supply module 901, Magnetic driving electric power road 502, silicon driving circuit 503 and controller, photoelectric coupling
Device OPT includes light emitting diode D5With phototriode Q0；Reverse-blocking tetrode thyristor KbOne end and magnetic latching relay switch KcOne
End is connect with No.1 node respectively, reverse-blocking tetrode thyristor KbThe other end, magnetic latching relay switch KcThe other end, inductance La's
One end, diode D1Positive terminal and diode D3Negative pole end respectively with node MaConnection, inductance LaThe other end, capacitor Ca
One end and capacitor C0One end respectively with node MbConnection, the other end of capacitor Ca are connected on No. two nodes, diode D2's
Positive terminal and diode D4Negative pole end be all connected to capacitor C0The other end on, diode D1Negative pole end and diode D2's
Negative pole end is all connected to light emitting diode D5Positive terminal on, diode D3Positive terminal and diode D4Positive terminal all connect
In light emitting diode D5Negative pole end on, phototriode Q0Emitter ground connection, phototriode Q0Collector respectively with electricity
Hinder R0One end connected with controller, resistance R0The other end connect with from electricity consumption power supply module, silicon driving circuit is respectively and controllably
Transwitch KbControl terminal connected with controller, Magnetic driving circuit respectively with magnetic latching relay switch KcControl terminal and control
Device connection.
As reverse-blocking tetrode thyristor KbWhen conducting, in magnetic latching relay switch KcThere are no in the case where disconnection, magnetic at this time is protected
Hold relay switch KcIt is also conducting, i.e. reverse-blocking tetrode thyristor KbWith magnetic latching relay switch KcIt is on shape simultaneously at this time
State.Due to reverse-blocking tetrode thyristor KbBranch has inductance LaConducting resistance, it is clear that magnetic latching relay switch KcThe impedance of branch is wanted
Far smaller than reverse-blocking tetrode thyristor KbThe impedance of branch, therefore flow through magnetic latching relay switch KcElectric current be greater than flow through it is silicon-controlled
Switch KbThe electric current of branch.If magnetic latching relay switch KcNot in current zero-crossing point break contact, easily damage contact.We
Case is from by obtaining inductance LaThe electric current I of branch1Correct time point when zero crossing, then controller is allowed to issue control signal to break
Open magnetic latching relay switch KcContact, allow magnetic latching relay switch KcClosing or opening movement is carried out when electric current is smaller,
Thus not easy burn-out magnetic latching relay switch KcOn contact, effectively extend magnetic latching relay switch KcUse
Service life, and then the service life of combination switch is also extended, structure is simple, high reliablity.
When in use, the collection terminal of the output end of No.1 transformer and No.1 voltage sampling circuit be both connected to one it is compound
On the No.1 node of switch, No. two nodes of this combination switch are connected on power supply network.Similarly, the output end of No. two transformers
It is both connected on the No.1 node of another combination switch with the sampling end of No. two voltage sampling circuits, the two of this combination switch
Number node is connected on power supply network.It is powered on by operating passing zero, voltage is small to the damage of power grid.Good reliability.
In a part of electricity storage to energy-storage battery group that pumped-storage power generation station is issued, and control is gone to generate electricity with electricity is deposited
Efficiency, so that the electrical stability of pumped-storage power generation station is good.
Pumped-storage power generation station further includes lower pond 27, transfer pond 25, equipped with lower suction pump 23 and can be by lower pond
Lower drinking-water pipe 26 that water is extracted into transfer pond and equipped with upper suction pump 80 and the upper pumping that the water in transfer pond can be extracted into reservoir
Water pipe 24；And transfer pond is arranged between reservoir and lower pond；The reservoir that can detect reservoir level height is equipped in reservoir
Water level sensor 81 is equipped with the transfer water level sensor 82 that can detect transfer pool water level height in transfer pond；Lower drinking-water pipe
Upper lower nozzle be arranged in mouthful upper and lower pond in pond in transfer pond, the upper lower nozzle of upper drinking-water pipe is arranged in reservoir
Chi Kou on and transfer pond in；Reservoir level sensor, transfer water level sensor, the control terminal of upper suction pump and lower suction pump
Control terminal be connected respectively with controller.The water gone out from the hydraulic turbine 35 is introduced into down in pond by a drainpipe 79.
Upper suction pump and under draw water and the water in lower pond can be pumped into reservoir China after pump startup and recycle.Reservoir
Water the hydraulic turbine 35 of pumped-storage power generation station is introduced by pipeline.
Pumped-storage power generation station further includes display 19 and voice prompting device 20, display and voice prompting device respectively with control
Device processed is connected.
Pumped-storage power generation station further includes the analog signal input conditioning circuit 21 being connected respectively with controller and electricity consumption
Adjusting knob 22.It is shown in Figure 11.
Pumped-storage power generation station further includes suction pump method for detecting abnormality, and shown suction pump method for detecting abnormality is as follows: pre-
It is first stored with lower suction pump corresponding electricity consumption gear in the case where difference draws water speed in memory；In use, user is by electricity consumption tune
It saves knob and is slowly adjusted from electricity consumption minimum gear to electricity consumption maximum gear, analog signal inputs conditioning circuit detection electricity consumption and adjusts rotation
The corresponding speed of drawing water of each electricity consumption gear of button, the corresponding lower suction pump of each electricity consumption gear that controller judgement detection obtains
Whether speed of drawing water reaches the normal range (NR) of the corresponding speed of drawing water of the pre-stored electricity consumption gear.If speed of drawing water does not have
Reach normal range (NR) and then judge failure, controller control display shows down that suction pump draws water the information of velocity anomaly, and controls
Voice prompting device issues audio alert prompt, and otherwise, controller control display, which exports lower suction pump speed of drawing water, normally to be believed
Breath；
Suction pump draw water velocity anomaly when, illustrate that suction pump takes out water as much and to expend more electricity at present for this, says
Bright lower suction pump at this time has had already appeared exception of drawing water, and needs replacing lower suction pump or repairs.It draws water in lower suction pump
Speed can remind user in time when occurring abnormal, detection accuracy is high, and False Rate and misdetection rate are low, improve maintenance efficiency.Similarly
It can judge the exception information of upper suction pump.
The electricity of depositing for depositing electricity control generating efficiency policy module controls generating efficiency optimal policy implementation method such as
Under:
Since the generating efficiency of pumped-storage power generation station needs to stablize in preset horizontal extent just with electricity is deposited
It is able to satisfy the lasting generating function of pumped-storage power generation station；If sell electricity be can Accurate Prediction, can be according to depositing electricity control
Generating efficiency strategy:
Optimum control function is obtained first；
Clocking and carving the electricity of depositing of t is x (t), the generated energy of unit time and to sell electricity be respectively u (t) and v (t), then they
Meet
Wherein v (t) is known function,
It preset Generation Rate and deposits electricity and is denoted as u respectively0And x0, make Generation Rate u (t) and deposit electricity x (t) and divide as far as possible
It is unstable in u0And x0Level on, obtain quadratic model object function after seeking control function u (t)
Reach minimum value, wherein T is any given time,It is weighted factor, for adjusting, u (t) is stable and x (t) is steady
Fixed significance level between the two, and application has the dimension of time inverse；
Depositing electricity x (t) in (1), (2) is function of state, deposited when might as well set t=0 and t=T for the sake of determination electricity as
Zero, i.e. fixed endpoint condition
X (0)=0, x (T)=0 (3)
In addition, actually to Generation Rate and deposit electricity all can Prescribed Properties limit, which is denoted as
0≤u(t)≤um, 0≤x (t)≤xm (4)
Ask u (t) that the functional F of (2) formula is made to reach minimum value under constraint condition (1), (3), (4)；
U (t) is solved from (1) formula and substitutes into (2) formula, and is write as the functional of x (t)
Put aside condition (4), then (3), (5) constitute an intrinsic endpoint functional extreme-value problem, solved with political reform
(1) is substituted into again after most being had solution x (t), can be obtained optimum control function；
Then control amount u can be determined according to the state x for being easy to observe；
To simplify solution procedure, if selling electricity is known constant, i.e.,
V (t)=v0 (6)
(5) formula is substituted into (6), can obtain optimal solution x (t) according to Eulerian equation should meet equation
I.e.
Solution of the equation (7) under end-point condition (3) be
(8) substitution (1) formula is obtained
(8) and (9) are respectively optimum state function and optimum control function；
It is obtained by (8), (9) two formulas
T → ∞ is enabled, then to arbitrary finite t, last goes to zero above formula right end, then has
Above-mentioned (11) formula shows that Generation Rate control function u can be directly determined according to depositing state of charge x, without regard to when
Between independent variable t, and u reduces when x increases, and this control mode is known as state negative-feedback, and the state negative-feedback is according to being easy to
The state x of observation can determine control amount u；
Finally to obtain the optimal solution of the former problem of constraint condition (4)；
It investigates constraint condition (4), (8), (9) two formulas can be expressed as again using hyperbolic functions
The schematic diagram of optimal solution x (t) He u (t) are drawn according to (12), (13) formula, and can be seen that from the schematic diagram, as long as
xm≥x0, just there is 0≤x (t)≤xm, i.e. x (t) meets condition (4)；And the parameter x providedmAnd x0Nature should have xm≥x0, separately
On the one hand, because
As long as so u (0)≤um, u (T) >=0 just has 0≤u (t)≤um, (8), (9) two formulas provide in such a situa-tion
X (t), u (t) also allow for constraint condition (4) former problem optimal solution；Electricity control power generation effect is deposited to can be obtained
The optimal policy of rate.
Sell electricity can preset or can Accurate Prediction, sell power quantity predicting exact value and can sell electric data according to history and obtain
Out.
In a part of electricity storage to energy-storage battery group that the present embodiment issues pumped-storage power generation station, and gone with electricity is deposited
Generating efficiency is controlled, so that the electrical stability of pumped-storage power generation station is good.
Pipeline includes No. two pipes 36 that No.1 pipe 37 and diameter are greater than No.1 pipe；The lower end of No. two pipes is connected in water wheels
On machine water inlet, the upper end of No. two pipes is integrally connected in the lower port of No.1 pipe, and the upper port of No.1 pipe is connected
On reservoir water outlet；
Pumped-storage power generation station further includes that Pipeline Water Hammer destroys reduction policy device 39, and No.1 side wall is equipped on No. two pipes
Hole 33；Pipeline Water Hammer, which destroys, reduces the sump 32 that policy device includes 43 upper end opening 44 of storehouse chamber, communicating pipe 34 and water wave elimination
Device 78；The both ends of communicating pipe be connected on the water outlet of sump bottom respectively and the No.1 areole of No. two pipes on；
Water wave cancellation element includes several cross bars 28 that horizontal interval both ends are fixedly connected on the intracavitary upper side wall in storehouse；?
Several oscillations are equipped on every cross bar straight down and eliminate vertical pipe 29, are set on the side pipe wall that vertical pipe is eliminated in every oscillation
There are several oscillations to eliminate side pipe hole 31；The angle of No.1 pipe and horizontal plane is θ.
It is eliminated in each oscillation and is fixed with the outer end oscillation block directed downwardly that disappears in the oscillation elimination vertical pipe above side pipe hole
30.The oscillation block that disappears, which has, to be entered the hydraulic pressure vibrated from the bottom up in oscillation elimination vertical pipe, and oscillation-damped effect is good.
This several oscillation elimination side pipe hole eliminated in vertical pipe are vibrated in same root to arrange in the shape of a spiral.
It is fixed with lower position block 83 on the storehouse cavity wall for the sump being located above cross bar, is being located above lower position block
Sump storehouse it is intracavitary be equipped with can up and down closed sliding closed slide plate 84, be located at closed slide plate above sump storehouse it is intracavitary
Equipped with fixed reinforcing rod 86, the both ends of a spring 85 are respectively fixedly connected on the lower surface of fixed reinforcing rod and closed slide plate
Upper surface on.
Several side openings 97 are equipped with also on pipeline along pipeline, the different height of pipeline is arranged in this several side opening
Place；Regulator 98 is respectively equipped on each side opening；Regulator includes connecting tube 87 and pressure regulating cavity 90, the vertical cloth of pressure regulating cavity
It sets, the intracavity sidewall of pressure regulating cavity is vertical wall, blow vent 96 is equipped on the upper top surface of pressure regulating cavity, on the bottom surface of pressure regulating cavity
Equipped with lower through-hole 91, closed sliding block 93 is equipped in the intracavitary sliding closed up and down of pressure regulating cavity；In the tune being located at below closed sliding block
The intracavitary of chamber is pressed to be equipped with lower limit circle 89, intracavitary in the pressure regulating cavity being located above closed sliding block is equipped with upper ejector pin 95, a bullet
The both ends of spring 94 be respectively fixedly connected on the lower surface of upper ejector pin and the upper surface of closed sliding block on；Distinguish at the both ends of connecting tube
Be connected on the side opening of pipeline and the lower through-hole of pressure regulating cavity bottom surface on；Control terminal and controller phase are equipped in connecting tube
The solenoid valve 88 of connection.
Several vertical holes 92 are equipped on closed sliding block.
The upper surface of closed sliding block includes interior ring region 205, Central District 203 and outer zone 201, the center of circle of interior ring region, middle ring
The center of circle and the center of circle of outer zone in area and the upper surface center of closed sliding block are overlapped；It include several internal in several vertical through-holes
The vertical through-hole 206 of ring, the vertical through-hole 204 of several pairs of middle rings and the vertical through-hole 202 of several pairs of outer rings；Several pairs of vertical through-holes of inner ring
It is arranged symmetrically in interior ring region；Several pairs of vertical through-holes of middle ring are arranged symmetrically in Central District；Several pairs of vertical through-holes pair of outer ring
Title is arranged in outer zone.
The diameter of the vertical through-hole of inner ring is greater than the diameter of the vertical through-hole of middle ring, and the diameter of the vertical through-hole of middle ring is perpendicular greater than outer ring
The diameter of clear opening, the diameter of the vertical through-hole of inner ring is less than one centimetre.
Water to be closed or to reduce turbine power generation when, open solenoid valve, the water attack in pipeline under the control of the controller
Effect will be distributed in each pressure regulating cavity, to reduce the Pipeline Water Hammer action breaks down of pumped-storage power generation station, vertical holes
Symmetrical porous arrangement can substantially reduce Pipeline Water Hammer action breaks down, good reliability.
The depth of water scale line 207 for being capable of measuring water surface elevation, the water at depth of water scale line are equipped on the inner wall of reservoir
Library, which is equipped with, can observe the camera 208 that the control terminal of water surface elevation is connected with controller.
The wireless positioning transceiving device 209 being connected respectively with controller, satellite school are additionally provided in pumped-storage power generation station
When device 210, GPS locator 211 and address scrambler 212.
It is as follows that the Pipeline Water Hammer that the Pipeline Water Hammer destroys reduction policy device reduces optimal policy implementation method:
(1), according to the second mechanics law of newton, the sum of the power in water flow movement direction is acted in No.1 pipe Have
Wherein, ρ is the density of water, and L is No.1 pipe range, s1No.1 tube section product, y are the water velocity in No.1 pipe, m2For
The pressure of No.1 pipe lower end water outlet water, m1For the pressure of No.1 pipe upper end water inlet water, g is gravitational constant, and θ is No.1
The angle of pipe and horizontal plane, c is the coefficient of viscosity；
Water velocity when y (t) is No.1 pipe inherence time t, m2It (t) is No.1 pipe lower end water outlet in time t
The pressure of water；
Reservoir level is constant, so the pressure m of No.1 pipe upper end water inlet water1For constant；
Water and No.1 pipe are nonelastic, and unit length tube wall square is inversely proportional to the resistance of water flow and water velocity, than
Example constant c is known as the coefficient of viscosity；
(2), because of the gravity ρ s of sump water inlet water column in orlop portion, storehouse0The difference of hg formation bottom and top pressure
s1m2-s0m1, then the statics equation of sump be
sim2-s0m1=ρ s0hg (A2)
Wherein, h is water bunker level height, s0Sump sectional area；
(3), according to law of conservation of energy, the difference that sump passes in and out water is equal to the variation of water in storehouse, that is, has
Wherein, s2For No. two pipe cross-sectional areas, w (t) is water velocity of the sump water outlet in time t；
When the water velocity w (t) of sump water outlet changes, the changing rule of water level h (t) in storehouse, from (A1)-(A3) formula
Middle cancellation m2With y (t), can obtain
Wherein, h (t) is height of water level of the sump in time t；
When w (t) is in stable state w0When nearby having minor change, h (t) is also in stable state h0Variation nearby；In (A4) formula
In enable h (t)=h0With w (t)=w0, h0And w0All it is constant, obtains
Wherein, m0For top atmospheric pressure,
If w (t)=w0+εw1(t), h (t)=h0+εh1(t) (A6)
Wherein, (A6) formula is substituted into (A4) formula and omitted containing ε and ε by ε very little2Item can obtain
Or it is denoted as
The primary condition of equation (A8) can be set as
For given various forms w1(t), (A8)-(A10) formula is easy to solve, and the general solution of (A8) formula is
Wherein ξ0、It is arbitrary constant；WhenWhenOscillation is presented, is represented by by (A9) formula oscillating condition
In practical projects, s1、s0、L、s2Parameter is limited by various conditions, but engineering build after the completion of s1、s0、L、s2
It is known parameters, coefficient of viscosity c very little, η is little, and the very slow concussion that decays, and because s are formed under condition (A12) formula0>
s1, L is larger, therefore k very little, and ω very little causes the cycle of oscillation of water in sump long, this is undesirable, therefore by sump
It is exactly that Pipeline Water Hammer reduces optimal policy reality that interior setting Pipeline Water Hammer, which destroys the oscillation for reducing policy device to eliminate water in sump,
Existing method.
The present embodiment is destroyed by Pipeline Water Hammer reduces policy device to reduce Pipeline Water Hammer action breaks down；In the storehouse of sump
When oscillation up and down occurs in water in chamber, vertical pipe is eliminated in several oscillations with holes can allow the oscillation of water to disappear quickly, reliably
Property it is high.
Reservoir water outlet is arranged in 41 on the bottom storehouse face of reservoir, and centre is equipped on the reservoir inner bottom surface of reservoir water outlet
There is the closed slide plate 46 of the bottom storehouse No.1 of plate hole 45, the upper port docking of No.1 pipe is closed to be fixedly connected on the closed slide plate of bottom storehouse No.1
Plate hole on；It is equipped with No.1 vertical pipe 47, and the die of No.1 vertical pipe upwards at the plate hole of the closed slide plate of bottom storehouse No.1
The hole heart line of the plate hole of line and the closed slide plate of bottom storehouse No.1 is all fallen in same vertical straight line；It is upper in No.1 vertical pipe to glide
It is dynamic to be equipped with No. two vertical pipes 48, it is fixedly connected on the upper orifice of No. two vertical pipes into water cover 73, in the upper surface of water inlet cover
On be respectively equipped with via hole 68, vertical cage apertures 74 and several inlet openings 69；Fixing sleeve is equipped with annulus on the side surface of water inlet cover
Plate 51 is equipped with gear 55 along the circumferential surface of Circular Plate on the upper surface of Circular Plate, is laid with outwardly in the surrounding of Circular Plate
Four horizon bars 52 are fixedly connected with pressure plare 53 in the outer end of every horizon bar, and the both ends of pressure plare are upturned
54；The upper end of piece No. three vertical tube 49 is fixedly connected on vertically in vertical cage apertures；Side wall is equipped on the side pipe wall of No. three vertical tubes
Hole 72, the both ends of an inclined tube 70 respectively closed fixation be connected on via hole and the areole of No. three vertical tubes on；One
The lower end of No.1 shaft 71, which horizontally rotates, to be arranged in No. three vertical tubes, and is locked in the No.1 shaft being located above vertical cage apertures
It is fixedly connected with annulus block 66, the ball 67 that can be rolled on the upper surface of water inlet cover is equipped on the lower surface of annulus block；One
The upper end of No. two shafts 75 of root is fixedly connected on the lower surface of No.1 shaft, and helical blade 50 is equipped in No. two shafts；
The diameter of No. two shafts is less than the diameter of No.1 shaft, and helical blade is located at the lower section of the areole of No. three vertical tubes；No.1
The lower end of shaft is located at the top of the areole of No. three vertical tubes；No.1 gear is equipped in the No.1 shaft being located above annulus block
65, be equipped with No. three shafts 62 straight up on the water inlet cover for being located at No.1 shaft right, be located at No. three shaft rights into
No. four shafts 61 are equipped on water cover straight up, level is equipped with No. five shafts towards the right side on the water inlet cover for being located at No. four shaft rights
59；Diameter is equipped in No. three shafts to be greater than No.1 gear and be mutually twisted No. two gears 64 of drive connection with No.1 gear；
No. three gears 63 that diameter is less than No.1 gear are equipped in No. three shafts being located at below No. two gears；It is set in No. four shafts
There is diameter to be greater than No. two gears and is mutually twisted No. four gears 76 of drive connection with No. three gears；It is being located at below No. four gears
No. four shafts be equipped with No.1 angular wheel 60；It is fixed in the left end of No. five shafts and is mutually twisted with No.1 angular wheel
The No.1 tooth sector 77 of drive connection；It is fixed with vertical rotating disc 58 in the right end vertical of No. five shafts, is being rotated vertically
The outer circumference surface of the half of disk is equipped with the gear 56 that drive connection can be mutually twisted with the gear in Circular Plate；It is vertical to turn
Remaining outer circumference surface of Moving plate is that the smooth arc surface 57 contacted is not wanted with the gear in Circular Plate.
Allow the water inlet of No.1 pipe always situated in the top of reservoir bottom surface silt 99, the silt of reservoir bottom surface is not easily accessible
In No.1 pipe, destruction of the silt to pipeline and the hydraulic turbine is reduced, safety is good.
The present embodiment has network monitoring, and energy-storage battery group is arrived in a part of electricity storage that pumped-storage power generation station is issued
On, and go control generating efficiency reservoir water occur so that the electrical stability of pumped-storage power generation station is good with electricity is deposited
Generated energy hour that is small and leading to pumped-storage power generation station then starts battery pack and externally generates electricity, so that pumped-storage power generation
The electrical stability stood is good, and can reduce Pipeline Water Hammer action breaks down, the silt of reservoir bottom surface be not easily accessible in pipeline to
It reduces silt and impact damage is caused to inner wall of the pipe and turbine blade.When workload demand is lower, the water of hydraulic turbine demand compared with
When few, a large amount of water under sump storage, water level is higher in sump；When workload demand becomes larger suddenly can be using the water in sump
Meet increase of the hydraulic turbine to water, avoids water flow in pipeline speed that big variation suddenly occurs and causes compared with havoc pipeline
The appearance of " water hammer ".
Embodiments of the present invention are described above in conjunction with attached drawing, however, the implementation is not limited to the above embodiments, this field
Those of ordinary skill can be with various changes and modifications may be made within the scope of the appended claims.
Claims (3)
1. distributed energy storage control coordination system, including energy storage control monitor supervision platform, power supply network, be connected to it is several on power supply network
The pumped-storage power generation station of different location is arranged in several in a power unit；Pumped-storage power generation station includes reservoir, water wheels
Machine and both ends are connected on reservoir water outlet respectively and on the water inlet of the hydraulic turbine and the water of reservoir can be guided to water wheels
The pipeline of machine；It is characterized in that, further respectively having wireless module in pumped-storage power generation station, depositing electricity control generating efficiency plan
Slightly module, memory, grid-connecting apparatus and controller；Grid-connecting apparatus includes the No.1 transformer being connected respectively with controller, one
Number voltage sampling circuit, switch K1, charger, energy-storage battery group, switch K2, inverter, filter, No. two transformers, No. two
Voltage sampling circuit, switch K3 and No. three voltage sampling circuits；The input terminal of No.1 transformer and the input terminal of charger connect
It connects on the power output end of pumped-storage power generation station；The output end of No.1 transformer and the collection terminal of No.1 voltage sampling circuit
It is both connected to one end of switch K1, the other end of switch K1 is connected on power supply network；The charging end of energy-storage battery group and charger
Output end connection, the both ends of switch K3 are connected to the discharge end of energy-storage battery group and the input terminal of inverter, inverter
Output end be connected to the input terminal of filter, the output end of filter is connected to the input terminal of No. two transformers, No. two transformations
The sampling end of the output end of device and No. two voltage sampling circuits is both connected to one end of switch K2, and the other end of switch K2 is connected to
On power supply network；The sampling end of No. three voltage sampling circuits is connected on power supply network；Deposit electricity control generating efficiency policy module, nothing
Wire module and memory are connected with controller respectively；Controller controls monitor supervision platform with energy storage by wireless module and is connected.
2. distributed energy storage control coordination system according to claim 1, which is characterized in that pumped-storage power generation station is also wrapped
Include lower pond, transfer pond, equipped with lower suction pump and the lower drinking-water pipe that the water in lower pond can be extracted into transfer pond and equipped with upper
Suction pump and the upper drinking-water pipe that the water in transfer pond can be extracted into reservoir；And the setting of transfer pond reservoir and lower pond it
Between；The reservoir level sensor that can detect reservoir level height is equipped in reservoir, transfer pond can be detected by being equipped in transfer pond
The transfer water level sensor of height of water level；The upper lower nozzle of lower drinking-water pipe is arranged in the upper and lower pond in pond mouthful in transfer pond
It is interior, the upper lower nozzle of upper drinking-water pipe be arranged on the Chi Kou of reservoir and transfer pond in；Reservoir level sensor, transfer water
The control terminal of level sensor, the control terminal of upper suction pump and lower suction pump is connected with controller respectively；It goes out from the hydraulic turbine
Water is introduced into down in pond by a drainpipe.
3. distributed energy storage control coordination system according to claim 1, which is characterized in that described to deposit electricity control power generation
Efficiency policy module deposit electricity control generating efficiency optimal policy implementation method it is as follows:
Since the generating efficiency of pumped-storage power generation station needs stabilization that could expire in preset horizontal extent with electricity is deposited
The lasting generating function of sufficient pumped-storage power generation station；If selling electricity is energy Accurate Prediction, can generate electricity according to electricity control is deposited
Efficiency strategy:
Optimum control function is obtained first；
Clocking and carving the electricity of depositing of t is x (t), and the generated energy of unit time is respectively u (t) and v (t) with electricity is sold, then they meet
Wherein v (t) is known function,
It preset Generation Rate and deposits electricity and is denoted as u respectively0And x0, distinguish Generation Rate u (t) as far as possible surely with electricity x (t) is deposited
It is scheduled on u0And x0Level on, obtain quadratic model object function after seeking control function u (t)
Reach minimum value, wherein T is any given time,It is weighted factor, for adjusting, u (t) is stable and x (t) stablizes two
Significance level between person, and application has the dimension of time inverse；
Depositing electricity x (t) in (1), (2) is function of state, and electricity is deposited when might as well set t=0 and t=T for the sake of determination as zero, i.e.,
Fixed endpoint condition
X (0)=0, x (T)=0 (3)
In addition, actually to Generation Rate and deposit electricity all can Prescribed Properties limit, which is denoted as
0≤u(t)≤um, 0≤x (t)≤xm (4)
Ask u (t) that the functional F of (2) formula is made to reach minimum value under constraint condition (1), (3), (4)；
U (t) is solved from (1) formula and substitutes into (2) formula, and is write as the functional of x (t)
Put aside condition (4), then (3), (5) constitute an intrinsic endpoint functional extreme-value problem, solve to obtain with political reform
(1) is substituted into again after most having solution x (t), can be obtained optimum control function；
Then control amount u can be determined according to the state x for being easy to observe；
To simplify solution procedure, if selling electricity is known constant, i.e.,
V (t)=v0 (6)
(5) formula is substituted into (6), can obtain optimal solution x (t) according to Eulerian equation should meet equation
I.e.
Solution of the equation (7) under end-point condition (3) be
(8) substitution (1) formula is obtained
(8) and (9) are respectively optimum state function and optimum control function；
It is obtained by (8), (9) two formulas
T → ∞ is enabled, then to arbitrary finite t, last goes to zero above formula right end, then has
Above-mentioned (11) formula shows that Generation Rate control function u can be directly determined according to depositing state of charge x, without regard to the time from
Variable t, and u reduces when x increases, this control mode is known as state negative-feedback, and the state negative-feedback is according to being easy to observe
State x can determine control amount u；
Finally to obtain the optimal solution of the former problem of constraint condition (4)；
It investigates constraint condition (4), (8), (9) two formulas can be expressed as again using hyperbolic functions
The schematic diagram of optimal solution x (t) He u (t) are drawn according to (12), (13) formula, and can be seen that from the schematic diagram, as long as xm≥
x0, just there is 0≤x (t)≤xm, i.e. x (t) meets condition (4)；And the parameter x providedmAnd x0Nature should have xm≥x0, another party
Face, because
As long as so u (0)≤um, u (T) >=0 just has 0≤u (t)≤um, (8), (9) two formulas provide in such a situa-tion x
(t), u (t) also allows for the optimal solution of the former problem of constraint condition (4)；Electricity control generating efficiency is deposited to can be obtained
Optimal policy.
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