CN102452588A - Energy-saving device for elevator - Google Patents
Energy-saving device for elevator Download PDFInfo
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- CN102452588A CN102452588A CN2010105138382A CN201010513838A CN102452588A CN 102452588 A CN102452588 A CN 102452588A CN 2010105138382 A CN2010105138382 A CN 2010105138382A CN 201010513838 A CN201010513838 A CN 201010513838A CN 102452588 A CN102452588 A CN 102452588A
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Abstract
The invention discloses an energy-saving device for an elevator. The device comprises an energy storage device, an energy storage device state detector, a charging and discharging circuit and an energy storage device controller, wherein the energy storage device controller performs charging and discharging control on the energy storage device according to the stored energy or residual capacity of the energy storage device at each zero power point in subsequent operation of the elevator, and an estimated value of the consumed or generated power and energy of an elevator motor between adjacent zero power points or in an interval from the current moment or position to the nearest zero power point. The energy of the elevator can be saved through electric energy release and regeneration energy storage, and power and energy consumed or generated when the elevator finishes the operation can be estimated at the specific moment, so that the operation load of a processor, the severe fluctuation of bus voltage and the charging and discharging current impact of the energy storage device are effectively reduced, and the capacity of the energy storage device can be fully utilized.
Description
Technical field
The present invention relates to a kind of energy-saving device of elevator, particularly relate to a kind of device that utilizes closed-center system to realize elevator energy-saving.
Background technology
In recent years; The closed-center system of setting up in the elevator drive major loop through suitable control makes its store regenerated energy when elevator motor regeneration moves; When the elevator motor electric operation, discharge stored energy; Thereby, the electric operation of elevator motor solves the handling problem of the regenerated energy of elevator motor generation in service for providing the mode of electric energy; Realize that simultaneously the elevator energy-saving effect has become the research focus of elevator industry; Like Chinese invention patent Shen Qing Publication specification sheets CN 101381046A, CN 1845417A, CN1946625A, Chinese invention patent specification sheets CN 100593504C, CN 100450907C, CN1229275C and international specification referred WO2010/019122A1, WO2010/019123A1, WO2010/019126A1, WO2010/027346A1 etc.
In utilizing the energy-conservation energy-saving device of elevator of closed-center system " regeneration energy storage, the electronic ability of releasing " realization; The closed-center system controller is controlled the charging and discharging currents of the said charge-discharge circuit of flowing through; Make its size and Orientation all follow the tracks of its command value, realize the charge and discharge process of closed-center system by this.In the prior art, the charging value of closed-center system generally is to generate through real-time calculating through the real-world operation state according to elevator traction machine.Owing to be real-time calculating, and some technology is comparatively complicated, calculated amount is very big, therefore can cause bigger computation burden to treater.Although international specification referred WO2010/027346A1 uses pattern, the target store status of setting closed-center system and the Power Exchange between elevator traction machine, power supply and the closed-center system to realize elevator energy-saving through the prediction of confirming elevator; But this method existence needs to collect the operating data in the past of elevator; Need bigger data storage capacity, its actual effect depends on the weak points such as order of accuarcy of analysis result to a certain extent.
On the other hand, in the energy-saving device of elevator based on closed-center system, the capacity of closed-center system and stored energy thereof have direct influence to the actual effect of elevator energy-saving, but prior art is not carried out deep discussion to this problem as yet.General processing mode is: the closed-center system discharge provides electric energy for the elevator motor electric operation, when the closed-center system discharge off, is directly switched to by mains supply by the closed-center system power supply; The regenerated energy that produces during closed-center system storage elevator motor regeneration operation when closed-center system is full of electric energy, switches to and converts regenerated energy into heat energy by the energy consumption circuit and discharge or feed back to electrical network through controlled rectifier.This processing mode gives no thought to electric energy that this operation of elevator need to consume maybe with energy storage capacity or residual capacity information in regenerated energy that produces and the closed-center system; It only is the power requirement (absorbing or generation) that satisfies elevator motor through simple switching; And can cause the comparatively violent fluctuation of bus voltage with handoff procedure than heavy current impact; Thereby the elevator drive performance is had a negative impact, and bigger in addition rush of current also may be to the generation negative effects such as life-span of closed-center system.
In addition, from the consideration of aspects such as cost, volume, the capacity of closed-center system is all relatively limited in the energy-saving device of elevator of general energy storage class, this make the closed-center system capacity utilize situation to become to influence a key factor of such energy-saving device of elevator energy-saving effect.Therefore, how to make full use of the key factor of capacity to realize that to greatest extent elevator energy-saving just becomes influences such energy-saving device of elevator energy-saving effect of closed-center system.
Therefore; Develop and a kind ofly can utilize closed-center system to handle the regenerated energy that produces in the running process of elevator and reduce elevator energy consumption; Can also make full use of simultaneously the capacity of closed-center system; Effectively overcome in the prior art processor calculating load excessive with need big data storage capacity, make full use of electric energy that this operation of elevator needs to consume maybe with the regenerated energy that produces and and closed-center system in the relation between energy storage capacity or residual capacity, effectively slow down the bus voltage big ups and downs; Avoid the energy-saving device of elevator of the shortcomings such as charging and discharging currents impact of closed-center system, become and utilize closed-center system to realize that one of elevator energy-saving has technical task to be solved.
Summary of the invention
The technical matters that the present invention will solve provides a kind of energy-saving device of elevator, can effectively reduce the computational load of treater, reduces data storage capacity, effectively slows down the bus voltage big ups and downs, and can realize making full use of of closed-center system capacity.
For solving the problems of the technologies described above, energy-saving device of elevator of the present invention comprises:
One closed-center system, is used to store the regenerated energy that produces when elevator motor regeneration moves, and when the elevator motor electric operation, stored energy is released into dc bus in the dc bus two ends through a charge-discharge circuit cross-over connection,
One closed-center system state detector is used to detect the mode of operation of said closed-center system;
One closed-center system controller is used to control the energy Flow between dc bus and said closed-center system;
One charge-discharge circuit is arranged between dc bus and the said closed-center system, is used to realize the energy two-way flow between the two; Wherein,
Said closed-center system controller is according to the closed-center system of each zero energy point in elevator follow-up operation energy storage capacity or residual capacity, and the elevator motor power that between each adjacent zeros power points or by current time or position to nearest this interval of zero energy point, will consume or produce and the discreet value of energy discharge and recharge control to said closed-center system.
Energy-saving device of elevator of the present invention can utilize closed-center system storing, regenerating energy when elevator motor regeneration operation, when the elevator motor electric operation, discharges stored energy, offers elevator motor and supplies its electric operation, reduces elevator energy consumption.
Energy-saving device of elevator of the present invention is through discharging and recharging control command value in particular moment or location point calculating; And make full use of this electric energy that moves need consumption of elevator maybe with the regenerated energy that produces; And and closed-center system in the relation between energy storage capacity or residual capacity, come effectively to overcome the shortcoming that processor calculating load in the prior art is excessive and need big data storage capacity.
Elevator control gear of the present invention discharges and recharges the charging and discharging currents impact that the control command value function can effectively slow down the bus voltage big ups and downs, avoid closed-center system through suitably choosing.
Elevator control gear of the present invention discharges and recharges the control command value function and also can further realize making full use of of closed-center system capacity through suitably choosing.
In prior art, especially in disclosed patent or patent application document at present, that relevant with the present invention mainly is Chinese invention patent specification sheets CN1217841C and international specification referred WO2010/027346A1.
Chinese invention patent specification sheets CN1217841C utilizes the power demand arithmetical circuit of setting up; Current instruction value according to the voltage instruction value that puts on electrical motor and motor current or supply electrical motor calculates in real time the elevator power demand; And then being in electronic or reproduced state according to the positive and negative judgement electrical motor of the elevator power demand that calculates gained, last charge-discharge control circuit is controlled according to result of determination again.In this mode, power demand comes from voltage instruction value and motor current that puts on electrical motor or the current instruction value of supplying with electrical motor; Power demand needs to calculate in real time; Need to judge electric motor state.
In the energy-saving device of elevator of the present invention, the closed-center system controller only needs to calculate the control command value that discharges and recharges control unit in particular moment or location point, and according to this command value discharging and recharging of closed-center system is controlled.Obviously, the present invention is different from Chinese invention patent specification sheets CN1217841C fully, and compares with it, owing to need not to calculate in real time, can effectively reduce the calculated load of treater.
Though international specification referred WO2010/027346A1 is through analyzing the elevator operating datas such as consumption of power that comprise operation pitch time, each run of being stored; Confirm the mode of the prediction use pattern of elevator, avoided in other technology because of calculating the big shortcoming of calculated load of the treater that causes in real time; But its existence needs to collect the operating data in the past of elevator, needs bigger data storage capacity, and its actual effect depends on the weak points such as order of accuarcy of analysis result to a certain extent.And the present invention is only calculating the control command value that discharges and recharges control unit in particular moment or location point, can discharging and recharging of closed-center system be controlled, and has overcome the deficiency of international specification referred WO2010/027346A1 fully.
In addition; The electric energy that this operation of the elevator that does not relate to as yet for prior art needs to consume maybe with the regenerated energy that produces and and closed-center system in the relation between energy storage capacity or residual capacity; The present invention has realized making full use of of closed-center system capacity making full use of on the basis of this information, effectively avoided bus voltage big ups and downs and closed-center system charging and discharging currents to impact shortcomings such as excessive.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is the overall structure scheme drawing of energy-saving device of elevator one embodiment provided by the invention;
Fig. 2 is the scheme drawing of closed-center system controller one embodiment among the present invention;
Fig. 3 is the scheme drawing of median generatrix voltage control loop one embodiment of the present invention;
Fig. 4 is the structural representation that discharges and recharges control unit one embodiment among the present invention.
Nomenclature among the figure:
1, external power supply 2, rectifier 3, smooth direct current electric capacity
4, bus voltage detecting device 5, energy consumption circuit 6, dc bus
7, inverter 8, current sensing means 9, elevator motor
10, traction sheave 11, track adjusting wheel 12, counterweight
13, car 14, speed detector 15, elevator drive controller
16, energy consumption controller 17, charge-discharge circuit 18, closed-center system controller
19, closed-center system 20, closed-center system state detector
The specific embodiment
Before the details specific embodiment of the invention, for ease of follow-up explanation, the special agreement as follows of doing:
Energy that elevator motor 9 consumes when being in motor-operated running state and power are for just; Otherwise; (regeneration) energy that elevator motor 9 produces when being in the regeneration running state and power are for negative; Electric current or its command value be for just representing that direction of current is to flow to dc bus 6 by closed-center system 19 through charge-discharge circuit 17, electric current or its command value for the negative indication direction of current for to flow to closed-center system 19 through charge-discharge circuit 17 by dc bus 6.
Referring to Fig. 1; In the present embodiment; External power supply 1 links to each other with the three-phase alternating current side of rectifier 2, and the DC side of rectifier 2 links to each other with the DC side input end of inverter 7 through dc bus 6, and smooth direct current electric capacity 3 and the 5 difference cross-over connections of energy consumption circuit are in dc bus 6 two ends; Bus voltage detecting device 4 is arranged on the two ends of smooth direct current electric capacity 3; 3 cross streams sides of inverter 7 link to each other with elevator motor 9 through current sensing means 8, and elevator motor 9 links to each other with traction sheave 10 through ad hoc structure, and car 13 passes through the both sides of rope hanging in traction sheave 10 and track adjusting wheel 11 with counterweight 12.Elevator drive controller 15 generates the control signal to inverter 7 according to the actual speed of the instruction or the allotment order of group control system and speed detector 14 detected elevator motors 9 in floor call, the sedan-chair and the current detecting result of current sensing means 8, makes elevator motor 9 drag car 13 operation up and down in hoistway.
Closed-center system 19 through charge-discharge circuit 17 cross-over connections in the two ends of dc bus 6.Closed-center system controller 18 is according to the elevator follow-up operation condition information that comes from bus voltage detecting device 4 detected DC bus-bar voltages, the testing result that comes from closed-center system state detector 20 and elevator drive controller 15; Charge-discharge circuit 17 is controlled, realized the transmission of energy between closed-center system 19 and dc bus 6 with this.Control is opened and turn-offed to energy consumption controller 16 according to bus voltage detecting device 4 detected DC bus-bar voltages and the information that comes from closed-center system controller 18 to the on-off element of energy consumption circuit 5.Energy consumption circuit 5 is used for regenerated energy is converted into heat and realizes regenerated energy consumption.
Closed-center system condition checkout gear 20 is for the detection of the mode of operation of closed-center system 19; Be one or more combinations of parameters of the parameter of the actual working state that can directly or indirectly embody said closed-center system through detecting the latter, these parameters can be the charge rates, terminal voltage, charging and discharging currents, temperature of closed-center system etc.
Referring to Fig. 2, the closed-center system controller 18 among the present invention comprises following a few sub-cells:
The energy storage calculating unit calculates the energy storage capacity or the residual capacity of said closed-center system according to the testing result of said closed-center system state detector 20.
Power and energy are estimated the unit, estimate elevator motor 9 between each zero energy point or the elevator motor power and the energy work rate that will consumed or produce by current time or position to nearest this elevator shuttle motor of zero energy point according to elevator follow-up operation situation.
The instruction generation unit; Estimate power and the energy work rate that the elevator motor 9 of unit output will consume or produce according to power and energy, and the closed-center system 19 exported of said energy storage calculating unit energy storage capacity or residual capacity generate the control command value that discharges and recharges control unit according to certain rules;
Discharge and recharge control unit; The control command value that discharges and recharges control unit that generates according to said instruction generation unit is controlled opening and turn-offing of power switch component in the said charge-discharge circuit, thereby realizes the tracking to its command value of charging and discharging currents or the power of said closed-center system 19.
Concrete working process is following:
In receiving car 13 and/or the task of floor call instruction or multiple lift control system distribute and when starting operation or when elevator in operational process because of occurring new car 13 in and/or floor call instructs or the task distribution of multiple lift control system when changing stopping layer of its this operation; Elevator drive controller 15 can according to the load of elevator and information such as stopping layer generate its accomplish this operation preceding the speed pattern that will follow; And control through 7 pairs of motors 9 of inverter according to this speed pattern; Thereby make lift car 13 as expected speed in hoistway, move, export elevator load, speed pattern and other elevator relevant information to closed-center system controller 18 simultaneously.Closed-center system controller 18 is according to the elevator follow-up operation condition information that comes from elevator drive controller 15; The status information that comes from the closed-center system 19 of closed-center system state detector 20; The bus voltage that comes from bus voltage detecting device 4 is controlled charge-discharge circuit 17, thereby realizes the transmission 19 of dc bus 6 and closed-center systems of energy and power.
18 pairs of charge-discharge circuits 17 of closed-center system controller apply control and comprise step:
Power and energy are estimated the unit according to elevator follow-up operation situation, estimate power and energy work rate that elevator will consume or produce between each zero energy point.
The energy storage calculating unit is according to the testing result that comes from closed-center system state detector 20; Calculate the energy storage capacity or the residual capacity of said closed-center system 19; If power and energy are estimated the unit and just are output as; Then calculate energy storage capacity, be output as negatively, then calculate residual capacity if power and energy are estimated the unit.
The instruction generation unit is estimated the elevator motor 9 exported the unit with catabiotic extreme value and power according to power and energy; And the closed-center system 19 of said energy storage calculating unit output energy storage capacity or residual capacity, generate the power control instruction value P that discharges and recharges control unit by following rule
Es(t):
If E
Es>=| E
Motor|, P so
Es(t)=min (| P
Motor(t) |, | P
Esm(t) |), t ∈ [t
1, t
2];
If E
Es＜| E
Motor|, P so
Es(t) satisfy
Wherein, work as E
Motor＞0 o'clock, E
EsIt is energy storage capacity in the closed-center system; Work as E
Motor＜0 o'clock, E
EsBe the residual capacity of closed-center system, E
MotorIt is the energy discreet value that elevator will consume or produce between the adjacent zeros power points in the follow-up operation; || be signed magnitude arithmetic(al) symbol, P
Es(t) for discharging and recharging the power control instruction value function of control unit, min () is for getting little operational symbol, P
Motor(t) be the elevator motor power between the adjacent zeros power points in the follow-up operation; Work as E
Motor＞0 o'clock, P
Esm(t) be the maximum discharge power that closed-center system and charge-discharge circuit allow; Work as E
Motor＜0 o'clock, P
Esm(t) be the minimum charging electric power that closed-center system and charge-discharge circuit allow; t
1Be the initial corresponding moment of zero energy point institute in the adjacent zeros power points, t
2It is the corresponding moment of end zero energy point institute in the adjacent zeros power points.
Discharge and recharge the control command value that discharges and recharges control unit that control unit generates according to said instruction generation unit and control opening and turn-offing of power switch component in the said charge-discharge circuit, thereby realize the tracking of charging and discharging currents or the power of said closed-center system its command value.
In addition, the instruction generation unit is gone back available income power control instruction value P for the generation that discharges and recharges the control unit control command value
Es(t) divided by the terminal voltage of bus voltage or closed-center system; With resulting merchant as the current control command value that discharges and recharges control unit; And when this command value during greater than maxim that charge-discharge circuit and closed-center system allowed, current control command value amplitude limit is said maxim.The amplitude limit value of power control instruction value or current control command value, the maximum that promptly charge-discharge circuit and closed-center system allowed discharges and recharges power or current value, can adjust according to the actual condition of storage closed-center system and charge-discharge circuit.
For fear of the fluctuation that DC bus-bar voltage occurs causing because of the elevator motor 9 power discreet value errors that factors such as system effectiveness, friction cause; Can set up a bus voltage control loop as shown in Figure 3; Its working process is: the DC bus-bar voltage actual value is admitted to a subtracter with its reference value as input; Subtracter obtains the DC bus-bar voltage error behind subtraction; This error further is admitted to voltage controller as input, and latter's output is compensated the required control command value of bus voltage error (power or electric current).With this control command value (power or electric current) and the said control command value that obtains in front and behind suitable amplitude limit as the control command value that discharges and recharges control unit.Because the bus voltage control loop partly need calculate in real time, thus the bus voltage control loop set up the calculated load that can increase treater to a certain extent.
Fig. 4 is the structural representation that discharges and recharges control unit; Its working process is: control command value is admitted to a subtracter with closed-center system 19 actual charging and discharging currents or power as input; Subtracter obtains electric current or power error behind subtraction; This error further is admitted to electric current or power controller as input; Latter's output obtains the control command of charge-discharge circuit 19, according to this control command charge-discharge circuit 19 is controlled, and can accomplish the exchange of energy between dc bus 6 and closed-center system 20.
Among the present invention; Before said power and energy are estimated unit, energy storage calculating unit and are instructed generation unit to betide this operation beginning of elevator for its calculating of exporting separately; Or this operation of elevator change stops layer time or the point of the zero energy in the follow-up operation.
Among the present invention; Said power and energy are estimated unit, energy storage calculating unit and instruction generation unit before elevator begins this operation or change this operation when stopping layer; With elevator by current time or position to the disposable completion of calculating of accomplishing each unit output of this each stage of operation, or before the elevator motor operation gets between an adjacent zeros power points, calculate output to each unit between should the adjacent zeros power points.
Among the present invention; When the regenerating power of elevator motor between the adjacent zeros power points or regenerative current exceed the scope that said closed-center system and said charge-discharge circuit allow; The energy consumption circuit can be started working when bus voltage rises to a certain predetermined value, thereby bus voltage is stabilized in appropriate location or interval; Or with the regenerating power of elevator motor in the follow-up operation or regenerative current exceeds said closed-center system and charge-discharge circuit institute allowed band part is instructed as energy consumption controller; And the energy consumption circuit suitably controlled; Collaborative Control through closed-center system controller and energy consumption controller realizes the constant of bus voltage or variation according to certain rules, and energy consumption controller adopts open loop or closed loop controlling structure to the energy consumption circuit control.
Among the present invention, elevator follow-up operation situation is meant load before elevator is accomplished this operation, stop one or more combination of layer, speed, acceleration/accel, speed pattern, remainder stroke, system effectiveness and other elevator relevant information.Said closed-center system can be one or more combinations of storage battery, super capacitor, nanometer electric capacity and other energy storage property device of not addressing, or one or more combinations of storage battery, super capacitor or nanometer electric capacity and the combination of fuel cell.Said charge-discharge circuit is any single branch road or the bi-directional DC-DC power converter that contains n (n >=2) bar branch road.Device according to the invention in addition can be connected in parallel in the eleva-tor bank of being made up of the elevator of many common dc buses.
What need supplemental instruction is: when elevator unloaded up or fully loaded when descending; Although stopping in this cycle of run of layer by starting to move to; Elevator motor 9 is in reproduced state generally, and produces regenerated energy and regenerating power, but in its start-up course; Be to obtain certain acceleration, elevator motor 9 still may experience an of short duration relatively electrokinetic process.If closed-center system controller 18 is not with each the zero energy point in the elevator follow-up operation (in fact for the control that discharges and recharges of closed-center system 19; The zero energy point is the switching point of the electronic and reproduced state of elevator motor) for basic; But be the basis with the entire run cycle of elevator, then can't tackle following situation: when unloaded up or fully loaded descending but residual capacity closed-center system 19 of elevator can't hold elevator motor 9 in accelerator with the regenerated energy that produces.Therefore closed-center system controller 18 is to be the basis with each the zero energy point in the elevator follow-up operation for the control that discharges and recharges of closed-center system 19 among the present invention.The required energy of electrokinetic process that experiences for the acquisition acceleration/accel in the said circumstances if can ignore; Closed-center system controller 18 just can be reduced to elevator and is basis by current time or location point to accomplishing this this interval of operation among the present invention so, that is: said closed-center system controller 18 moves power that this interval will consume or produce and the discreet value of energy to said closed-center system 19 discharge and recharge control by current time or location point to accomplishing this according to the current energy storage capacity of elevator or residual capacity and elevator motor 9.
Core concept of the present invention be utilize elevator before startup, change stops layer or zero energy point and can estimate power and this characteristic of energy that elevator will consume or produce realize the control that discharges and recharges to closed-center system 19 in follow-up operation; Therefore any on basis of the present invention, being through variation such as predictor method that change power and energy is regarded as extension naturally of the present invention and expands, thereby all should be regarded as protection scope of the present invention.
Claims (15)
1. energy-saving device of elevator comprises:
One closed-center system, is used to store the regenerated energy that produces when elevator motor regeneration moves, and when the elevator motor electric operation, stored energy is released into dc bus in the dc bus two ends through a charge-discharge circuit cross-over connection;
One closed-center system state detector is used to detect the mode of operation of said closed-center system;
One closed-center system controller is used to control the energy Flow between dc bus and said closed-center system;
One charge-discharge circuit is arranged between dc bus and the said closed-center system, is used to realize the energy two-way flow between the two; It is characterized in that,
Said closed-center system controller is according to the energy storage capacity or the residual capacity of each zero energy point closed-center system in the elevator follow-up operation; And elevator motor is between each adjacent zeros power points or by current time or position to nearest this interval of zero energy point; With the power that consumes or produce and the discreet value of energy, said closed-center system is discharged and recharged control.
2. energy-saving device of elevator according to claim 1 is characterized in that: said zero energy point is meant that elevator is the zero moment or position by current time or position to accomplishing the power that elevator motor will consume or produce in this this process of operation.
3. energy-saving device of elevator according to claim 1 is characterized in that, said closed-center system controller comprises following subelement:
The energy storage calculating unit calculates the energy storage capacity or the residual capacity of said closed-center system according to the testing result of said closed-center system state detector;
Power and energy are estimated the unit, estimate between each zero energy point or the elevator motor power and the energy work rate that will consumed or produce by current time or position to nearest this elevator shuttle motor of zero energy point according to elevator follow-up operation situation;
The instruction generation unit; Estimate power and the energy that the elevator motor of unit output will consume or produce according to power and energy; And the closed-center system of said energy storage calculating unit output energy storage capacity or residual capacity, generate the control command value that discharges and recharges control unit according to certain rules;
Discharge and recharge control unit, the control command value that generates according to said instruction generation unit is controlled opening and turn-offing of power switch component in the said charge-discharge circuit, thereby realizes the tracking to its command value of charging and discharging currents or the power of said closed-center system.
4. energy-saving device of elevator according to claim 3 is characterized in that: said elevator follow-up operation situation is meant load before elevator is accomplished this operation, stop one or more the combination in layer, speed, acceleration/accel, speed pattern, remainder stroke, the system effectiveness.
5. energy-saving device of elevator according to claim 3 is characterized in that, said instruction generation unit is followed following rule and generated the power control instruction value P that discharges and recharges control unit
Es(t):
If E
Es>=| E
Motor|, P so
Es(t)=min (| P
Motor(t) |, | P
Esm(t) |), t ∈ [t
1, t
2];
If E
Es＜| E
Motor|, P so
Es(t) satisfy
Wherein, work as E
Motor＞0 o'clock, E
EsIt is energy storage capacity in the closed-center system; Work as E
Motor＜0 o'clock, E
EsBe the residual capacity of closed-center system, E
MotorIt is the energy discreet value that elevator will consume or produce between the adjacent zeros power points in the follow-up operation; || be signed magnitude arithmetic(al) symbol, P
Es(t) for discharging and recharging the power control instruction value function of control unit, min () is for getting little operational symbol, P
Motor(t) be the elevator motor power between the adjacent zeros power points in the follow-up operation; Work as E
Motor＞0 o'clock, P
Esm(t) be the maximum discharge power that closed-center system and charge-discharge circuit allow; Work as E
Motor＜0 o'clock, P
Esm(t) be the minimum charging electric power that closed-center system and charge-discharge circuit allow; t
1Be the initial corresponding moment of zero energy point institute in the adjacent zeros power points, t
2It is the corresponding moment of end zero energy point institute in the adjacent zeros power points.
6. energy-saving device of elevator according to claim 5 is characterized in that: the control command value that said instruction generation unit generates, and with power control instruction value P
Es(t) resulting discussing after the terminal voltage divided by bus voltage or closed-center system as the current control command value that discharges and recharges control unit; And when this current control command value during greater than maxim that charge-discharge circuit and closed-center system allowed, current control command value amplitude limit is said maxim.
7. energy-saving device of elevator according to claim 3; It is characterized in that: before said power and energy are estimated unit, energy storage calculating unit and instructed generation unit to betide this operation beginning of elevator for its calculating of exporting separately; Or this operation of elevator change stops layer time or the point of the zero energy in the follow-up operation.
8. energy-saving device of elevator according to claim 3; It is characterized in that; Said power and energy estimate unit, energy storage calculating unit and instruction generation unit before elevator begins this operation or change this operation when stopping layer with elevator by current time or position to the disposable completion of calculating of accomplishing each unit output of this each stage of operation, or calculating is to the output of each unit between should the adjacent zeros power points before the elevator motor operation gets between an adjacent zeros power points.
9. according to claim 5 or 6 described energy-saving device of elevator; It is characterized in that: the amplitude limit value of said power control instruction value or current control command value; Be that the maximum that charge-discharge circuit and closed-center system allow discharges and recharges power or current value, adjust according to the actual condition of said closed-center system and charge-discharge circuit.
10. energy-saving device of elevator according to claim 1; It is characterized in that: also comprise one being arranged at the dc bus two ends, being used for regenerated energy is converted into heat and realizing the energy consumption circuit of the consumption of regenerated energy; When the regenerating power of elevator motor between the adjacent zeros power points or regenerative current exceed the scope that said closed-center system and charge-discharge circuit allow, thereby the energy consumption circuit is started working when bus voltage rises to a certain predetermined value bus voltage is stabilized in appropriate location or interval.
11. energy-saving device of elevator according to claim 1; It is characterized in that: also comprise one be arranged at the dc bus two ends be used for regenerated energy is converted into heat and realizes the energy consumption circuit that regenerated energy consumes; And the energy consumption controller that this energy consumption circuit is controlled; When the regenerating power of elevator motor between the adjacent zeros power points or regenerative current exceed the scope that said closed-center system and charge-discharge circuit allow; The regenerating power of elevator motor in the follow-up operation or regenerative current are exceeded said closed-center system and the charge-discharge circuit institute allowed band part command value as energy consumption controller; And by energy consumption controller the energy consumption circuit is suitably controlled, the Collaborative Control through closed-center system controller and energy consumption controller realizes the constant of bus voltage or changes according to certain rules.
12. energy-saving device of elevator according to claim 11 is characterized in that: said energy consumption controller adopts open loop or closed loop controlling structure to the energy consumption circuit control.
13. energy-saving device of elevator according to claim 1; It is characterized in that: said closed-center system can be one or more combinations of storage battery, super capacitor or nanometer electric capacity, or one or more combinations of storage battery, super capacitor or nanometer electric capacity and the combination of fuel cell.
14. energy-saving device of elevator according to claim 1 is characterized in that: said charge-discharge circuit is any single branch road or the bi-directional DC-DC power converter that contains n bar branch road, wherein n >=2.
15. energy-saving device of elevator according to claim 1 is characterized in that: said energy-saving device of elevator is connected in parallel in the eleva-tor bank of being made up of the elevator of many common dc buses.
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| CN201010513838.2A CN102452588B (en) | 2010-10-21 | 2010-10-21 | Energy-saving device for elevator |
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| CN201010513838.2A CN102452588B (en) | 2010-10-21 | 2010-10-21 | Energy-saving device for elevator |
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| CN102452588B CN102452588B (en) | 2014-01-01 |
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| CN103350935A (en) * | 2013-07-17 | 2013-10-16 | 湖南中建建科机械有限公司 | Energy-saving control system |
| CN106564786A (en) * | 2015-10-13 | 2017-04-19 | 上海三菱电梯有限公司 | Elevator control method based on three-level electric power converter and control device |
| CN108408515A (en) * | 2018-03-21 | 2018-08-17 | 上海交通大学 | Elevator energy recovery system based on energy-storage battery and method |
| CN113224808A (en) * | 2021-04-14 | 2021-08-06 | 钟亮 | Novel elevator energy-saving device based on super capacitor |
| CN114380171A (en) * | 2022-02-21 | 2022-04-22 | 同济大学 | Energy-saving elevator and energy-saving method of elevator |
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