CN109552064A - A kind of hybrid power system and its working method based on battery - Google Patents
A kind of hybrid power system and its working method based on battery Download PDFInfo
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- CN109552064A CN109552064A CN201811349204.0A CN201811349204A CN109552064A CN 109552064 A CN109552064 A CN 109552064A CN 201811349204 A CN201811349204 A CN 201811349204A CN 109552064 A CN109552064 A CN 109552064A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
- B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
- B60L9/08—Electric propulsion with power supply external to the vehicle using dc motors fed from ac supply lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/30—AC to DC converters
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The present invention relates to crane dynamic Control fields, a kind of hybrid power system and its working method based on battery is provided, it is mainly used for hybrid power crane, the system is mainly by providing a system to the power source system of energy, energy recycling system based on battery, operating mechanism and DC bus composition, the power source system, energy recycling system, operating mechanism all can directly be connected with bus, wherein, main power system provides electric energy for system, energy regenerating is being understood the gravitional force in recovery operation mechanism using system and is being stored in utilization, achieve the purpose that potential energy feedback.The present invention has the advantages that battery provides major impetus for system, the gravitional force of feedback in operating mechanism can be fully absorbed in the case where guaranteeing safety, and requirement of original hoisting equipment to electric system is reduced, it substantial saved electric cost, reduce the loss of the energy.
Description
Technical field
The present invention relates to crane dynamic Control fields, and in particular to a kind of hybrid power system based on battery and its
Working method is mainly used for hybrid power crane.
Background technique
Crane is the engineering machinery with typical potential energy loading high feature, can be discharged when workload decline a large amount of
Potential energy, there is also energy losses when crane brake, practice have shown that, the capacity usage ratio of crane during the work time is insufficient
40%, how a large amount of energy charge will largely expend energy and carry out recycling and reusing in the reactive power state of the course of work
It is the hot issue of hoisting machinery field energy-saving and emission-reduction research.
There are mainly two types of the methods taken at present: one is the electric energy feedback of the power generation of crane to power grid, in addition one
Kind is that electric energy is stored into accumulator.Now battery is added to be a kind of good potential energy recycling side using DC bus
Method, but deficiency is studied in potential energy feedback and energy utilization strategy at present, crane is at light load due to the output work of power source
Power needed for rate can satisfy load, therefore battery is not involved in work, the energy of storage fails to consume and lead to potential energy feedback
Stage energy cannot recycle, and safe Resistance work is made to waste energy；The power of power source cannot individually meet load when overloaded
Required power is supplemented from the conduct of the energy of battery, although the energy of battery is utilized, utilization is insufficient, and
Of different sizes due to load, the capacity usage ratio of battery is not identical (storage battery energy utilization rate is 0 at light load) yet, not
Play the maximum efficiency for saving energy.Therefore it provides a kind of structurally reasonable, easy to use, effective energy conservation, efficiency of energy utilization
High, good in economic efficiency hybrid power crane energy conserving system is necessary.
Summary of the invention
The purpose of the present invention is being directed to the deficiency of existing hybrid power crane accumulator cell charging and discharging control strategy, propose
A kind of hybrid power system and its control method based on battery, effectively raises the energy-saving efficiency of hybrid power system,
The cost for reducing power equipment makes energy-saving efficiency be increased to 50% or more under the premise of guaranteeing security of system.
The purpose of the present invention is what is realized by following technical measures.
A kind of hybrid power system based on battery, including power source system, energy recycling system, working machine
Structure and DC bus；The power source system include power source, fairing and boosting frequency converter, the power source be alternating current or
Diesel generating set, the fairing convert alternating current to direct current, and the boosting frequency converter promotes DC bus-bar voltage,
Simultaneously for limiting the output power of power source；The energy recycling system includes two-way DC/DC converter and electric power storage
Pond, the two-way DC/DC converter are mounted between DC bus and battery, can change energy flow direction, work as system
When energy consumption, two-way DC/DC convertor controls storage battery energy flows to DC bus, and two-way DC/DC converter work is in BOOST mould
Under formula, boost function is realized；When system generates energy, the energy of two-way DC/DC convertor controls DC bus flows to electric power storage
Pond, two-way DC/DC converter work realize buck functionality, charge to battery under BUCK mode；The operating mechanism
Including brake unit, safe Resistance, inverter, lifting mechanism, cart walking mechanism and running gear for trolley, the braking is single
Member connects between DC bus and safe Resistance, and the inverter connects in DC bus and lifting mechanism, cart walking mechanism
And between running gear for trolley, direct current is transformed into alternating current by the inverter, is used for alternating current generator.
The present invention also provides a kind of working method of above-mentioned hybrid power system based on battery, this method includes
Following steps:
(1) battery nominal voltage U is set, can be made the appropriate adjustments according to the specifications and models difference of battery；
(2) accumulator status is detected, judges that can it work normally；
(3) if accumulator status is abnormal, enter safety nonclient area, arrestment first (refers to that use should be based on electric power storage
The equipment of the hybrid power system in pond) work, exclusion reparation then is carried out to failure, and finally return that step (2)；
(4) if accumulator status is normal, equipment working state is detected, determination is energy feedback or needs to consume energy；
(5) if working condition is energy feedback, equipment working state is detected again, if attonity, enters and waits shape
State, and return step (4)；If there is potential energy feedback, charge to battery, and real-time detection battery voltage U1, with mark
Constant voltage U compares, if U1≤U and work terminate, direct return step (4)；If U1 > U, opens safe Resistance or selection is more
Operating mechanism's teamwork mode consumes excess energy, when the work has been finished, return step (4)；
(6) if working condition is energy consumption, enter autonomous working area, equipment is independently powered by battery, and detects direct current
Busbar voltage, electric current, until DC bus-bar voltage, electric current tend towards stability, progress working condition detection is then returned if potential energy feedback
It returns step (5)；
(7) if working condition is lasting energy consumption, enter hybrid working area of successively decreasing, equipment is supplied by power source and battery joint
Electricity, wherein storage battery power supply accounting is gradually declined by the 100% of autonomous working area, and power source power supply accounting is gradually risen by 0%, with
Working condition detection is carried out afterwards, if energy consumption terminates, starts to carry out potential energy feedback, then return step (5), if equipment persistently consumes energy,
It then needs to identify DC bus-bar voltage Uz, electric current Iz, and it is compared with battery power P, work as P > 1/2UzIzWhen return
Successively decrease hybrid working area, repeats the process；
(8) 1/2 needed for battery power is equipment work when, then enter half hybrid working area, battery and dynamic
Power source power supply accounting respectively accounts for 50%, and remains unchanged, and then carries out working condition detection if being changed into potential energy feedback and returns to step
Suddenly (5) need detection battery voltage U1, and be compared with nominal voltage U, if U1 > 10%U, return if lasting energy consumption
Half hybrid working area repeats the process, if U1≤10%U, should return step (2) immediately, guarantee the safety of system
Property.
The present invention is based on the hybrid power systems of battery, are realized using novel intelligent energy control strategy maximum
Potential energy recycling and utilization.The control model that this programme uses is divided into: autonomous working area, hybrid working area of successively decreasing, half are mixed
Close workspace and safety nonclient area.Autonomous working area is exactly that equipment (such as crane) starts to work and by battery provide energy
Amount, power needed for identifying actual job each time after DC bus-bar voltage is stablized successively decrease subsequently into hybrid working area of successively decreasing
During hybrid working battery output power gradually reduce until the half for being reduced to actually required power no longer reduces and with original
Power respectively accounts for 50% joint for can enter half hybrid working area, if battery voltage is reduced to battery nominal voltage
10%, then battery does not participate in work and enters safety nonclient area with energy to be supplemented, this is to ensure accumulator positive
Normal lifetime settings, such case only can just will appear in life of storage battery advanced stage for battery.This control model exists
First stage is 100% to be accounted about by accumulator energy supply, second stage accumulator than 75%, phase III accounting 50%, therefore control
50% or more energy conservation is theoretically existing on strategy, and regardless of payload size, circulation is not always the case each time.It is simultaneously absorption port
The regeneration energy generated in mouth crane work reserves enough spaces.
The present invention has the advantages that the performance of battery has been given full play to, every in the equipment course of work such as crane
A workspace all greatly reduces the dependence to power source, reduces the deployment cost of power equipment, and makes energy-saving efficiency
Reach 50% or more；Battery provides major impetus for system, can fully absorb operating mechanism in the case where guaranteeing safety
The gravitional force of middle feedback, and requirement of original hoisting equipment to electric system is reduced, it substantial saved electric cost, reduce
The loss of the energy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present system.
Fig. 2 is the flow diagram of the working method of present system.
Specific embodiment
In order to be apparent to technological means of the invention, creation characteristic and purpose, the present invention is made below further
It illustrates.
As shown in Figure 1, the present embodiment provides a kind of hybrid power system based on battery, including power source system 1, energy
Measure recycling and reusing system 2, operating mechanism 3 and DC bus 4；The power source system 1 includes power source 1.1, fairing
1.2 and boosting frequency converter 1.3, the power source 1.1 be alternating current or diesel generating set, the fairing 1.2 is by alternating current
It is converted into direct current, the boosting frequency converter 1.3 promotes 4 voltage of DC bus, while the output work for limiting power source 1.1
Rate；The energy recycling system 2 includes two-way DC/DC converter 2.1 and battery 2.2, the two-way DC/DC transformation
Device 2.1 is mounted between DC bus 4 and battery 2.2, can change energy flow direction, when system energy consumption, two-way DC/
DC converter 2.1 controls 2.2 energy of battery and flows to DC bus 4, and two-way DC/DC converter work is real under BOOST mode
Existing boost function；When system generates energy, the energy that two-way DC/DC converter 2.1 controls DC bus 4 flows to battery
2.2, two-way DC/DC converter work realizes buck functionality, charges to battery under BUCK mode；The working machine
Structure 3 includes brake unit 3.1, safe Resistance 3.2, inverter 3.3, lifting mechanism 3.4, running gear for trolley 3.5 and cart
Walking mechanism 3.6, the brake unit 3.1 connect between DC bus 4 and safe Resistance 3.2, and the inverter 3.3 connects
Between DC bus 4 and lifting mechanism 3.4, running gear for trolley 3.5 and cart walking mechanism 3.6, the inverter 3.3 will
Direct current is transformed into alternating current, uses for alternating current generator.
As shown in Fig. 2, the present embodiment illustrates the work of the above-mentioned hybrid power system based on battery by taking crane as an example
Make method, comprising the following steps:
(1) battery nominal voltage U is set, can be made the appropriate adjustments according to the specifications and models difference of battery；
(2) accumulator status is detected, judges that can it work normally；
(3) if accumulator status is abnormal, enter safety nonclient area, first the work of stopping crane, then to failure
Exclusion reparation is carried out, and finally returns that step (2)；
(4) if accumulator status is normal, crane operating status is detected, determination is energy feedback or needs to consume
Energy；
(5) if working condition is energy feedback, crane operating status is detected again, if attonity, enters and waits
State, and return step (4)；If there is potential energy feedback, charge to battery, and real-time detection battery voltage U1, with
Nominal voltage U compares, if U1≤U and work terminate, direct return step (4)；If U1 > U, safe Resistance or selection are opened
The more operating mechanisms of crane (including lifting mechanism 3.4, running gear for trolley 3.5 and cart walking mechanism 3.6) combine while opening
Exhibition consumption in operation falls excess energy, when the work has been finished, return step (4)；
(6) if working condition is energy consumption, enter autonomous working area, crane is independently powered by battery, and is detected straight
Busbar voltage, electric current are flowed, until DC bus-bar voltage, electric current tend towards stability, carries out working condition detection, then if potential energy feedback
Return step (5)；
(7) if working condition is lasting energy consumption, enter hybrid working area of successively decreasing, crane is supplied by power source and battery joint
Electricity, wherein storage battery power supply accounting is gradually declined by the 100% of autonomous working area, and power source power supply accounting is gradually risen by 0%, with
Working condition detection is carried out afterwards, if energy consumption terminates, starts to carry out potential energy feedback, then return step (5), if crane persistently consumes
Can, then it needs to identify DC bus-bar voltage Uz, electric current Iz, and it is compared with battery power P, work as P > 1/2Uz IzWhen
Return is successively decreased hybrid working area, and the process is repeated；
(8) when battery power be crane work needed for 1/2 when, then enter half hybrid working area, battery and
Power source power supply accounting respectively accounts for 50%, and remains unchanged, and then carries out working condition detection and returns if being changed into potential energy feedback
Step (5) needs detection battery voltage U1, and be compared with nominal voltage U, if U1 > 10%U, returns if lasting energy consumption
Go back to half hybrid working area, repeat the process, if U1≤10%U, should return step (2) immediately, guarantee the safety of system
Property.
The content being not described in detail in this specification belongs to the prior art well known to those skilled in the art.
Finally it is pointed out that the above disclosure is only the preferred embodiments of the present invention, cannot be limited certainly with this
The interest field of the present invention, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (2)
1. a kind of hybrid power system based on battery, it is characterised in that: sharp again including power source system (1), energy regenerating
With system (2), operating mechanism (3) and DC bus (4)；The power source system (1) includes power source (1.1), fairing
(1.2) and boosting frequency converter (1.3), the power source (1.1) are alternating current or diesel generating set, the fairing (1.2)
Direct current is converted alternating current to, the boosting frequency converter (1.3) promotes DC bus (4) voltage, while for limiting power
The output power in source (1.1)；The energy recycling system (2) includes two-way DC/DC converter (2.1) and battery
(2.2), the two-way DC/DC converter (2.1) is mounted between DC bus (4) and battery (2.2), can change energy
Flow direction, when system energy consumption, two-way DC/DC converter (2.1) control battery (2.2) energy flows to DC bus (4),
Two-way DC/DC converter work realizes boost function under BOOST mode；When system generates energy, two-way DC/DC transformation
The energy of device (2.1) control DC bus (4) flows to battery (2.2), and two-way DC/DC converter works under BUCK mode,
It realizes buck functionality, charges to battery；The operating mechanism (3) include brake unit (3.1), safe Resistance (3.2),
Inverter (3.3), lifting mechanism (3.4), running gear for trolley (3.5) and cart walking mechanism (3.6), the brake unit
(3.1) it connects between DC bus (4) and safe Resistance (3.2), the inverter (3.3) connects in DC bus (4) and rises
It rises between mechanism (3.4), running gear for trolley (3.5) and cart walking mechanism (3.6), the inverter (3.3) is by direct current
Electricity is transformed into alternating current, uses for alternating current generator.
2. a kind of working method of the hybrid power system based on battery as described in claim 1, it is characterised in that the party
Method the following steps are included:
(1) battery nominal voltage U is set；
(2) accumulator status is detected, judges that can it work normally；
(3) if accumulator status is abnormal, enter safety nonclient area, first arrestment work, then to failure into
Row excludes to repair, and finally returns that step (2)；
(4) if accumulator status is normal, equipment working state is detected, determination is energy feedback or needs to consume energy；
(5) if working condition is energy feedback, equipment working state is detected again, if attonity, enters and waits shape
State, and return step (4)；If there is potential energy feedback, charge to battery, and real-time detection battery voltage U1, with mark
Constant voltage U compares, if U1≤U and work terminate, direct return step (4)；If U1 > U, opens safe Resistance or selection
More operating mechanism's teamwork modes consume excess energy, when the work has been finished, return step (4)；
(6) if working condition is energy consumption, enter autonomous working area, equipment is independently powered by battery, and detects direct current
Busbar voltage, electric current, until DC bus-bar voltage, electric current tend towards stability, progress working condition detection is then returned if potential energy feedback
It returns step (5)；
(7) if working condition is lasting energy consumption, enter hybrid working area of successively decreasing, equipment is supplied by power source and battery joint
Electricity, wherein storage battery power supply accounting is gradually declined by the 100% of autonomous working area, and power source power supply accounting is gradually risen by 0%, with
Working condition detection is carried out afterwards, if energy consumption terminates, starts to carry out potential energy feedback, then return step (5), if equipment persistently consumes energy,
It then needs to identify DC bus-bar voltage Uz, electric current Iz, and it is compared with battery power P, as P > 1/2UzIzWhen return
Successively decrease hybrid working area, repeats the process；
(8) 1/2 needed for battery power is equipment work when, then enter half hybrid working area, battery and dynamic
Power source power supply accounting respectively accounts for 50%, and remains unchanged, and then carries out working condition detection if being changed into potential energy feedback and returns to step
Suddenly (5) need detection battery voltage U1, and be compared with nominal voltage U, if U1 > 10%U, returns if lasting energy consumption
Half hybrid working area repeats the process, if U1≤10%U, should return step (2) immediately, guarantee the safety of system
Property.
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2018
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| JP2012228034A (en) * | 2011-04-18 | 2012-11-15 | Mitsubishi Electric Corp | Charge and discharge system between electric automobile and house |
| CN103944157A (en) * | 2014-03-27 | 2014-07-23 | 中国科学院电工研究所 | Direct current supply system for drilling machine and control method of direct current supply system |
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