CN108408515A - Elevator energy recovery system based on energy-storage battery and method - Google Patents
Elevator energy recovery system based on energy-storage battery and method Download PDFInfo
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- CN108408515A CN108408515A CN201810236750.7A CN201810236750A CN108408515A CN 108408515 A CN108408515 A CN 108408515A CN 201810236750 A CN201810236750 A CN 201810236750A CN 108408515 A CN108408515 A CN 108408515A
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- Prior art keywords
- elevator
- energy
- storage battery
- power
- converter
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
- B66B1/302—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor for energy saving
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
Abstract
The present invention provides a kind of elevator energy recovery system and method based on energy-storage battery, including：Elevator power prediction module, energy-storage battery, grid-connected converter and two-way DC converter, elevator power prediction module estimate the mean power needed for an elevator lower cycle of operation for the data information before being run according to elevator；Grid-connected converter is used for transmission mean power required in an elevator lower cycle of operation；Two-way DC converter is used to drive energy-storage battery to absorb the peak power generated during elevator operation；Energy-storage battery is used to carry out the control of charge and discharge according to busbar voltage fluctuation.The present invention runs mean power by estimating elevator, controls grid-connected converter output-constant operation, reduces grid-connected power swing, improves simultaneously network electric energy quality；One numerical value of lift cycle mean power is only estimated, the operand of elevator power prediction module is reduced, it is lower, more efficient to calculate cost；Electric energy is recycled together using energy-storage battery and grid-connected converter, and organic efficiency is high.
Description
Technical field
The present invention relates to elevator energy recycling fields, and in particular, to a kind of elevator energy recycling based on energy-storage battery
System and method.
Background technology
In recent years, with the promotion of China's economic level, the propulsion of Development of China's Urbanization, the raising of people's living standard, I
State's elevator industry achieves fast development.At the same time, elevator energy-saving technology becomes the research hotspot of elevator industry, especially right
The utilization of regeneration energy when running is regenerated in elevator motor.A kind of mode is will to regenerate energy to be converted into exchange by inversion
Electricity, and feed back to neighbouring same power grid or used for other electrical equipments；Another then be DC energy storage, energy-storage battery is in electricity
When machine regeneration operation, storage regeneration energy；When motor powered is run, release energy.
However there is also many problems for these technologies, it, can be to power grid if directly feeding back to power grid using by elevator energy
It impacts, such as power grid power quality, since output power uncertainty causes voltage fluctuation.If using DC energy storage, face
Face the selection of energy storage device.If accumulator to be used for the power supply system of elevator, accumulator electrode active during the work time first
Property substance can chemically react, cause accumulator property constantly to be decayed, also needed to often in power insecure area of power grid
Depth charge and discharge, cause the life of storage battery to shorten；Battery power density is small simultaneously, and the power of elevator is larger, in order to make mother
Line voltage maintains certain range, and accumulator is needed with relatively high power.Series connection series mistake is then faced with using super capacitor
Height can cause the decline of super capacitor group energy storage efficiency or laminated structure excessively huge, and the higher problem of cost.
In the prior art, document CN201010270130 (application number 201010270130.9, authorized announcement date 2014 2
Months 26 days) control method that has studied two-way DC converter, it proposes, according to the elevator follow-up operation relevant information, to calculate shape
At the power patterns computing unit of elevator follow-up operation power patterns；CN201010513838 (application number 201010513838.2,
Authorized announcement date on January 1st, 2014) it proposes according to elevator motor between each adjacent zeros power points, or by current time or position
The power that will be consumed or generate to nearest this section of zero energy point and energy discreet value carry out charge and discharge to energy storage device
Control.These inventions are all the performance numbers by estimating next period Each point in time before elevator is run and are controlled,
It there are lift cycle power swing is big, needs to calculate more performance number, the deficiencies of control error is larger.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of elevator energy recovery systems of energy-storage battery
And method.
According to a kind of elevator energy recovery system based on energy-storage battery provided by the invention, including：Elevator power prediction
Module, energy-storage battery, grid-connected converter and two-way DC converter, wherein：
The elevator power prediction module estimates an elevator lower cycle of operation for the data information before being run according to elevator
Required mean power；
The grid-connected converter is used for transmission mean power required in an elevator lower cycle of operation；
The two-way DC converter is used to drive energy-storage battery to absorb the peak power generated during elevator operation；
The energy-storage battery is used to carry out the control of charge and discharge according to busbar voltage fluctuation.
Preferably, the data information includes the electric current for making elevator counterweight balance that elevator frequency converter when static exports
iloadWith floor range ability L.
Preferably, the energy-storage battery includes one or more in lead-acid accumulator, lithium battery and super capacitor, described
The capacity of energy-storage battery is more than 2 times of the capacity of capacitance needed for elevator emergency, and the power of the energy-storage battery is more than elevator maximum
Run 1.5 times of power.
Preferably, the grid-connected converter calculates the reference electricity of the d axis in an elevator lower cycle of operation by mean power
Stream, then pass through current inner loop control grid-connected current.
Preferably, the two-way DC converter controls energy-storage battery charge and discharge by detecting DC bus-bar voltage；When straight
When flowing busbar voltage more than rated voltage, then energy-storage battery charges；When DC bus-bar voltage is less than rated voltage, then energy storage is electric
Tank discharge.
According to a kind of elevator energy recovery method based on energy-storage battery provided by the invention, include the following steps：
Mean power prediction steps：Elevator power prediction module run according to elevator before data information, estimate under elevator
Mean power needed for one cycle of operation；
Average power transfer step：Grid-connected converter transmits mean power required in an elevator lower cycle of operation；
Peak power absorption step：Two-way DC converter driving energy-storage battery absorbs the spike generated during elevator operation
Power；
Charge and discharge control step：Energy-storage battery carries out the control of charge and discharge according to busbar voltage fluctuation.
Preferably, the data information includes the electric current for making elevator counterweight balance that elevator frequency converter when static exports
iloadWith floor range ability L.
Preferably, the energy-storage battery includes one or more in lead-acid accumulator, lithium battery and super capacitor, described
The capacity of energy-storage battery is more than 2 times of the capacity of capacitance needed for elevator emergency, and the power of the energy-storage battery is more than elevator maximum
Run 1.5 times of power.
Preferably, the grid-connected converter calculates the reference electricity of the d axis in an elevator lower cycle of operation by mean power
Stream, then pass through current inner loop control grid-connected current.
Preferably, the two-way DC converter controls energy-storage battery charge and discharge by detecting DC bus-bar voltage；When straight
When flowing busbar voltage more than rated voltage, then energy-storage battery charges；When DC bus-bar voltage is less than rated voltage, then energy storage is electric
Tank discharge.
Compared with prior art, the present invention has following advantageous effect：
1, the present invention runs mean power by estimating elevator, controls grid-connected converter output-constant operation, reduces grid-connected work(
Rate fluctuates, and improves simultaneously network electric energy quality；
2, the present invention only estimates one numerical value of lift cycle mean power, reduces the fortune of elevator power prediction module
It is lower, more efficient to calculate cost for calculation amount；
3, the present invention recycles electric energy together using energy-storage battery and grid-connected converter, and organic efficiency is high.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the elevator energy recovery system structural schematic diagram provided by the invention based on energy-storage battery；
Fig. 2 is running process of elevator power diagram in the present invention；
Fig. 3 is two-way DC converter circuit diagram in the present invention；
Fig. 4 is the elevator energy recovery method flow chart of steps provided by the invention based on energy-storage battery.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection domain.
As shown in Figure 1, according to the elevator energy recovery system provided by the present invention based on energy-storage battery, including elevator fortune
Row power estimates module, energy-storage battery, grid-connected converter, elevator frequency converter and two-way DC converter.Grid-connected converter exchanges
Side is connected with power grid, and grid-connected converter DC side is connected with elevator frequency converter DC side, two-way DC converter DC bus side,
Elevator frequency converter exchange side is connected with traction motor, and two-way DC converter low-pressure end is connected with energy-storage battery, and energy-storage battery can
For in lead-acid accumulator, lithium battery and super capacitor one kind or combination, the capacity of energy-storage battery be more than needed for elevator emergency and hold
2 times of amount, energy-storage battery power are more than the maximum operation power of 1.5 times of elevator.The elevator control cabinet of traction motor is controlled by elevator
Information elevator operation load M before operationloadAnd floor range ability L sends elevator power prediction module, elevator power to
Prediction module calculates the running average power in next period, and controls grid-connected converter, and it is grid-connected to reach invariable power.
As shown in Fig. 2, during the elevator single cycle of operation, due to will appear startup and braking process, so will appear
Different power swings, or even motor regeneration operation can occur in same period and run two states with motor powered.In order to make
Grid-connected converter should then calculate elevator monocycle operation mean power, pass through current inner loop in each period output-constant operation
To control grid-connected converter current on line side, and energy-storage battery is set to absorb elevator startup and brake by two-way DC converter
The power swing generated in journey.
The specific course of work is as follows：
Before elevator starts operation, elevator remains static, and in order to make elevator remain static, frequency converter can export
Electric current is that lift car balances each other with counterweight.Every elevator can all have specific load-current curve.Therefore it is quiet to obtain elevator
The only inverter current i under stateload(trimming moment electric current), you can calculate elevator operation load Mload, elevator operation load
Although the load-carrying of elevator, not equivalent to passenger weight can be indicated, generally zero is taken in the case where 50% loads.And it is electric
The gross energy of terraced signal period consumption is mainly made of gravitional force variable quantity and friction energy-dissipating, the wherein enabled variation of gravity
Amount is represented by：ΔEp=K1MloadL, wherein K1For constant, with the ginsengs such as elevator hoisting motor magnetic linkage and machine shaft effective radius
Number is related；And friction energy-dissipating is represented by Δ Ef=K2L, wherein K2For constant, with Coulomb friction force coefficient and viscous friction coefficient
The gross energy of equal relating to parameters, the consumption of elevator signal period can indicate Δ E=Δs Ep+ΔEf=K1MloadL+K2L, K1And K2
Acquisition is calculated or tested by elevator traction machine parameter.Accelerated according to floor range ability L and elevator operation maximum speed and elevator
Degree calculates running time T.Elevator operation mean power P can be calculated by gross energy E and running time T.
Calculated elevator operation mean power P is transferred to the controller of grid-connected converter by elevator power prediction module,
The network voltage of sampling and electric current are subjected to dq transformation, are converted into DC quantity.Since the coupling between d axis and q axis can be to system
It has an impact, in order to enable the system to outputting high quality waveform, needs, using the decoupling between decoupling control realization d axis and q axis, to make
It independently of each other, conveniently passes through idAnd iqThe active component and reactive component of grid-connected converter are controlled respectively, and control reactive component is
Zero (enables iq_ref=0).Then i can be calculated in the elevator operation mean power P of calculating gone out by elevator power prediction moduled_ref,
Pass through current inner loop control grid-connected current again.
While grid-connected converter output-constant operation, opened by two-way DC converter to make energy-storage battery absorb elevator
The power swing generated in dynamic and braking process.As shown in figure 3, two-way DC converter is used using Buck-Boost topologys
Independent PWM control modes.By the d-c bus voltage value U of samplingdIt is transmitted to the controller of two-way DC converter, and right with this
Two-way DC converter is controlled.Such as it is 650V to take DC bus rated voltage, works as UdWhen ＞ 680, in order to keep direct current female
Line voltage drops to 650V, switching tube S1Work in PWM mode, switching tube S2Always it turns off, does diode use, bidirectional, dc
Converter works in Buck circuit-modes, and energy-storage battery carries out charging energy-storing, until DC bus-bar voltage is down to 650V；Work as Ud＜
When 620, in order to make busbar voltage rise to 650V, switching tube S2Work in PWM mode, switching tube S1Always it turns off, makees diode
Boost circuit pattern is worked in using two-way DC converter, energy-storage battery carries out electric discharge and releases energy, until DC bus-bar voltage liter
To 650V.It is finally reached the effect for absorbing the peak power generated during elevator operation.
As shown in figure 4, according to a kind of elevator energy recovery method based on energy-storage battery provided by the invention, including：
Mean power prediction steps：Elevator power prediction module run according to elevator before data information, estimate under elevator
Mean power needed for one cycle of operation；The data information include elevator frequency converter when static export keep elevator counterweight flat
The electric current i of weighing apparatusloadWith floor range ability L.Average power transfer step：Grid-connected converter transmitted in an elevator lower cycle of operation
Required mean power；Grid-connected converter calculates the reference current of the d axis in an elevator lower cycle of operation by mean power, then
Pass through current inner loop control grid-connected current.Peak power absorption step：Two-way DC converter drives energy-storage battery to absorb elevator
The peak power generated during operation；Two-way DC converter controls energy-storage battery charge and discharge by detecting DC bus-bar voltage；
When DC bus-bar voltage is more than rated voltage, then energy-storage battery charges；When DC bus-bar voltage is less than rated voltage, then store up
It can battery discharge.Charge and discharge control step：Energy-storage battery carries out the control of charge and discharge according to busbar voltage fluctuation.Energy-storage battery packet
Include one or more in lead-acid accumulator, lithium battery and super capacitor, the capacity of the energy-storage battery is more than elevator emergency institute
2 times of the capacity of capacitance, the power of the energy-storage battery are needed to be more than 1.5 times of elevator maximum operation power.
The present invention runs mean power by estimating elevator, controls grid-connected converter output-constant operation, reduces grid-connected power
Fluctuation improves simultaneously network electric energy quality, only estimates elevator operation one numerical value of mean power, reduces the operation of power prediction module
Amount.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (10)
1. a kind of elevator energy recovery system based on energy-storage battery, which is characterized in that including：Elevator power prediction module, storage
Energy battery, grid-connected converter and two-way DC converter, wherein：
The elevator power prediction module is estimated for the data information before being run according to elevator needed for an elevator lower cycle of operation
Mean power；
The grid-connected converter is used for transmission mean power required in an elevator lower cycle of operation；
The two-way DC converter is used to drive energy-storage battery to absorb the peak power generated during elevator operation；
The energy-storage battery is used to carry out the control of charge and discharge according to busbar voltage fluctuation.
2. the elevator energy recovery system according to claim 1 based on energy-storage battery, which is characterized in that the data letter
Breath includes the electric current i for making elevator counterweight balance that elevator frequency converter when static exportsloadWith floor range ability L.
3. the elevator energy recovery system according to claim 1 based on energy-storage battery, which is characterized in that the energy storage electricity
Pond includes one or more in lead-acid accumulator, lithium battery and super capacitor, and the capacity of the energy-storage battery is answered more than elevator
2 times of the capacity of capacitance needed for urgency, the power of the energy-storage battery are more than 1.5 times of elevator maximum operation power.
4. the elevator energy recovery system according to claim 1 based on energy-storage battery, which is characterized in that the grid-connected change
The reference current for the d axis that device was calculated by mean power in an elevator lower cycle of operation is flowed, then grid-connected by current inner loop control
Electric current.
5. the elevator energy recovery system according to claim 1 based on energy-storage battery, which is characterized in that described two-way straight
Current converter controls energy-storage battery charge and discharge by detecting DC bus-bar voltage；When DC bus-bar voltage is more than rated voltage,
Then energy-storage battery charges；When DC bus-bar voltage is less than rated voltage, then energy-storage battery discharges.
6. a kind of elevator energy recovery method based on energy-storage battery, which is characterized in that include the following steps：
Mean power prediction steps：Elevator power prediction module run according to elevator before data information, estimate under elevator a fortune
Mean power needed for the row period；
Average power transfer step：Grid-connected converter transmits mean power required in an elevator lower cycle of operation；
Peak power absorption step：Two-way DC converter driving energy-storage battery absorbs the spike work(generated during elevator operation
Rate；
Charge and discharge control step：Energy-storage battery carries out the control of charge and discharge according to busbar voltage fluctuation.
7. the elevator energy recovery method according to claim 6 based on energy-storage battery, which is characterized in that the data letter
Breath includes the electric current i for making elevator counterweight balance that elevator frequency converter when static exportsloadWith floor range ability L.
8. the elevator energy recovery method according to claim 6 based on energy-storage battery, which is characterized in that the energy storage electricity
Pond includes one or more in lead-acid accumulator, lithium battery and super capacitor, and the capacity of the energy-storage battery is answered more than elevator
2 times of the capacity of capacitance needed for urgency, the power of the energy-storage battery are more than 1.5 times of elevator maximum operation power.
9. the elevator energy recovery method according to claim 6 based on energy-storage battery, which is characterized in that the grid-connected change
The reference current for the d axis that device was calculated by mean power in an elevator lower cycle of operation is flowed, then grid-connected by current inner loop control
Electric current.
10. the elevator energy recovery method according to claim 6 based on energy-storage battery, which is characterized in that described two-way
DC converter controls energy-storage battery charge and discharge by detecting DC bus-bar voltage；When DC bus-bar voltage is more than rated voltage
When, then energy-storage battery charges；When DC bus-bar voltage is less than rated voltage, then energy-storage battery discharges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236750.7A CN108408515B (en) | 2018-03-21 | 2018-03-21 | Elevator energy recovery system and method based on energy storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810236750.7A CN108408515B (en) | 2018-03-21 | 2018-03-21 | Elevator energy recovery system and method based on energy storage battery |
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| CN108408515B CN108408515B (en) | 2020-01-07 |
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| JP2014118283A (en) * | 2012-12-18 | 2014-06-30 | Toshiba Elevator Co Ltd | Elevator |
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2018
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| CN1835329A (en) * | 2006-04-10 | 2006-09-20 | 中国科学院电工研究所 | Hybrid accumulator for elevator and control method thereof |
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