CN107359641A - The potential energy recovery system and its recovery method of crane gear - Google Patents
The potential energy recovery system and its recovery method of crane gear Download PDFInfo
- Publication number
- CN107359641A CN107359641A CN201710627946.4A CN201710627946A CN107359641A CN 107359641 A CN107359641 A CN 107359641A CN 201710627946 A CN201710627946 A CN 201710627946A CN 107359641 A CN107359641 A CN 107359641A
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- energy
- control unit
- crane gear
- output end
- voltage
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention proposes a kind of potential energy recovery system and its recovery method of crane gear, the invention includes being connected to the rectification unit of power network, the output end of the rectification unit is connected with converter unit, the output end of the converter unit is connected with the motor that energy can be provided for crane gear, the inverter of power network is connected to, the DC output end of the inverter is connected to the output end of the rectification unit；The inverter parallel has the energy-storage units that can be stored or release energy, and the output end of the energy-storage units is connected to the output end of the rectification unit；The output end of the inverter is connected with the braking resistor that regeneration energy can be converted into thermal energy consumption, and braking resistor connects the output end of energy-storage units and the output end of rectification unit simultaneously.The invention solves the problems, such as the energy-saving efficiency of crane gear regeneration energy, reduces the cost of crane gear potential energy recovery system, improves the input economy of potential energy recovery system.
Description
Technical field
The invention belongs to energy regenerating field, more particularly to a kind of crane gear potential energy recycling field.
Background technology
At present, dissipated at harbour in groceries and container handling transporting equipment, door machine, tyred container door type lifting
At work, its lifting mechanism regenerative braking during the decline of carrying goods produces the equipment such as machine, shore container crane
Substantial amounts of electric energy, and this portion of energy is typically to be dissipated in the form of heat energy, regeneration energy can not be used effectively.If it can fill
Divide potential energy caused by the decline of reclaiming crane structure and use this portion of energy for jack machinism rising or other loads, can
A large amount of electric costs are saved, and reduce energy loss, improve Port Economic benefit.
At present, the main method for regenerating energy effective utilization caused by jack machinism operation there are two kinds, one kind is inverse
Become feedback type regeneration energy absorbing device, it mainly forms high-power thyristor three-phase inverter using power electronic devices, should
The DC side of inverter is connected with crane gear dc bus, on its alternating current inlet wire incoming transport power network；When regenerative braking is raised
When DC bus-bar voltage exceedes setting, inverter startup simultaneously absorbs electric current from dc bus, by Way of Regenerating Energy Feedback to exchange
Power network；Another kind is the potential energy recovery device by the use of super capacitor as energy-accumulating medium, super capacitor and DC/DC converter phases
Even, while it is connected in parallel on dc source bus.The discharge and recharge of DC/DC convertor controls super capacitor storage units, converter inspection
Measure after voltage is increased to predetermined value and charged to super capacitor, converter detects that voltage drops to after predetermined value to super capacitor
Electric discharge, when DC bus-bar voltage is in normal value, it is super capacitor discharge and recharge that converter, which stops,.
But there is problems with above two mode：Inversion feedback type regenerates energy absorbing device by direct current energy feedback
It is easy to power network to produce impact when loopback energy is excessive to AC network；Simultaneously feedback energy one-way flow, if harbour its
He can not consume feedback fraction energy simultaneously at equipment, then can have anti-power transmission phenomenon.And utilize super capacitor energy-storage recycling dress
Put and disclosure satisfy that two-way circulating for device interior energy, avoid regeneration energy and AC network contacts, but due to super
Electric capacity volume is big, capacity is small, price costly the shortcomings that, it is difficult to meet simultaneously crane gear regeneration energy organic efficiency with
The economy of device input.
The content of the invention
In order to solve the above problems, the invention provides a kind of potential energy recovery system of crane gear and its recovery method,
The advantage that the invention is two-way circulated using the cost and volume advantage and energy-storage units of inverter, both Collaborative Controls, solve
The energy-saving efficiency problem of crane gear regeneration energy, reduces the cost of crane gear potential energy recovery system, improves potential energy
The input economy of recovery system.
In order to achieve the above object, the technical solution adopted by the present invention is：
A kind of potential energy recovery system of crane gear, including the rectification unit of power network is connected to, the three of power network are intersected
Stream electricity is converted to direct current, forms bus direct current, and the output end of the rectification unit is connected with converter unit, the frequency conversion list
The output end of member is connected with the motor that energy can be provided for crane gear, further comprises the inverter for being connected to power network, described
The DC output end of inverter is connected to the output end of the rectification unit；The inverter parallel has and can store or discharge energy
The energy-storage units of amount, the output end of the energy-storage units are connected to the output end of the rectification unit；The output of the inverter
End is connected with the braking resistor that regeneration energy can be converted into thermal energy consumption, and braking resistor connects the output end of energy-storage units simultaneously
And the output end of rectification unit.
As the further optimization of the present invention, the energy-storage units include the electric capacity that can carry out discharge and recharge, and the electric capacity connects
Direct current can be converted to the reversible transducer of direct current by being connected to, to control the discharge and recharge of the electric capacity；The reversible transducer it is another
One end is connected to the output end of the rectification unit.
As the further optimization of the present invention, further comprising can be described to the central control unit of the real-time monitoring of system
The CMS units of the capacitance state can be gathered by being connected between electric capacity and the central control unit, and the CMS element memories have
CAN, the status information of electric capacity is uploaded to central control unit in real time.
As the further optimization of the present invention, inversion control is connected between the central control unit and the inverter
Unit；Variable flow control unit is connected between the central control unit and the two way convertor.
A kind of potential energy recovery method of crane gear, using the potential energy recovery system of crane gear described in any of the above-described,
Comprise the following steps：When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, center
Control unit control inversion control unit by inverter by Way of Regenerating Energy Feedback to AC network, while monitor the three intersecting of power network
The voltage of voltage and dc bus electricity is flowed, when the energy of inversion feedback exceedes the consumable energy of AC institute, center control
Unit processed control inversion control unit reduces the power of inversion feedback, at the same central control unit control converter control unit by
Two way convertor will regenerate energy and electric capacity will be charged, and with storage energy, reach collaboration voltage stabilizing；When the potential energy energy of regenerative braking reaches
During to peak point, central control unit control converter control unit makes two way convertor increase storage power；Work as regenerative braking
Potential energy energy to the consumable energy of AC institute below when, central control unit controls inversion control unit will by inverter
Way of Regenerating Energy Feedback is to AC network, until direct current net pressure recovers normal value；When crane gear raising or need urgent power branch
When holding, central control unit control converter control unit is discharged the energy that electric capacity stores by two way convertor, is suppressed
Direct current net voltage falls.
As the further optimization of the present invention, when crane gear is down or up, capacitor charge and discharge concretely comprises the following steps：
When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, reversible transducer is examined in real time
The voltage of dc bus electricity is surveyed, after the voltage of dc bus electricity is increased to first predetermined value, control electric capacity charging；When direct current is female
When the voltage of line electricity drops to normal value, reversible transducer stops charging for electric capacity；When crane gear rises, dc bus electricity
Voltage decline, reversible transducer detects that voltage drops to and electric capacity electric discharge is given after second predetermined value；When the electricity of dc bus electricity
When pressure rises to normal value, converter stops discharging for electric capacity.
As the further optimization of the present invention, when energy-storage units or inverter break down out of service, center control
Unit monitors malfunction, and control energy-storage units or inverter out of service, until trouble shooting；When under malfunction, gesture
When can regenerate energy and being more than crane gear maximum recovery ability, start braking resistor and consumed, with protection equipment safety.
Compared with prior art, the advantages and positive effects of the present invention are：
1st, the potential energy recovery system of crane gear of the present invention, it passes through the energy-storage units and inverter that are arranged in parallel, inversion
Device feeds back to the potential energy regeneration energy of crane gear in AC network, and energy-storage units are stored potential energy regeneration energy, are made
Regeneration energy is converted into thermal energy consumption by dynamic resistance in plant failure, ensure that system is reliable under regenerative braking state
Property；Solve the problems, such as the energy-saving efficiency of crane gear regeneration energy by the such scheme of the present invention, reduce crane gear gesture
The cost of energy recovery system, improve the input economy of potential energy recovery system.
2nd, present invention incorporates capacitance energy storage advantage and inversion feedback advantage, it is two-way not only to realize device interior energy
Flowing, while regeneration energy is fed back to AC network in real time and reclaimed, recovery is remaining to be stored by electric capacity, makes full use of regeneration
Energy, while meet energy-saving efficiency and economy.
Brief description of the drawings
Fig. 1 is the schematic diagram of potential energy recovery system of the present invention.
Above in each figure：1st, electric capacity；11st, CMS units；2nd, reversible transducer；21st, Variable flow control unit；3rd, inverter；
31st, inversion control unit；4th, rectification unit；5th, converter unit；6th, braking resistor；7th, motor.
Embodiment
Below, the present invention is specifically described by exemplary embodiment.It should be appreciated, however, that do not entering one
In the case of step narration, element, structure and features in an embodiment can also be advantageously incorporated into other embodiment
In.
As shown in figure 1, the potential energy recovery system of crane gear of the present invention, for crane gear regeneration potential energy recovery with
Utilize, the potential energy recovery system of the crane gear, including be connected to the rectification unit 4 of power network, by the three-phase alternating current of power network
Direct current is converted to, forms bus direct current, the output end of the rectification unit 4 is connected with converter unit 5, the converter unit
5 output end is connected with the motor 7 that energy can be provided for crane gear, further comprises the inverter 3 for being connected to power network, described
The DC output end of inverter 3 is connected to the output end of the rectification unit 4；The inverter 3 is parallel with and can store or release
The energy-storage units of exoergic amount, the output end of the energy-storage units are connected to the output end of the rectification unit 4；The inverter
Output end is connected with the braking resistor 6 that regeneration energy can be converted into thermal energy consumption, and braking resistor 6 connects energy-storage units simultaneously
The output end of output end and rectification unit 4.
In above-mentioned, the inverter 3 is AC/DC inverters, and the AC of the wherein inverter 3 is directly connected to power network, directly
The output end of side connection rectification unit is flowed, i.e., is directly connected with bus direct current.By such scheme, bus DC side is
The outlet side of rectification unit 4, the bus DC side connect DC output side, braking resistor and the energy-storage units of inverter simultaneously
Outlet side.
The energy-storage units include the electric capacity 1 that can carry out discharge and recharge, and the electric capacity is preferably super capacitor, and the electric capacity 1 connects
Direct current can be converted to the reversible transducer 2 of direct current by being connected to, to control the discharge and recharge of the electric capacity 1；The reversible transducer 2 is
DC/DC converters, the other end of the reversible transducer 2 are connected to the output end of the rectification unit 4.
With continued reference to Fig. 1, the potential energy recovery system of crane gear of the present invention also includes can be to the center of the real-time monitoring of system
Control unit 8, central control unit 8 are connected with the GPRS wireless communication modules 9 that can be wirelessly transferred, the electric capacity 1 and institute
State and be connected with the CMS units 11 that can gather the capacitance state between central control unit 8, have CAN in the CMS units 11
Communication module, the status information of electric capacity is uploaded to central control unit 1 in real time.
In above-mentioned, the CMS units 11 are capacitance management system, and its role is to carry in energy storage units the most
Important hard core control task, super capacitor real-time monitoring and control, uniform voltage function, temperature detecting function, voltage inspection can be realized
Brake and fault alarm function etc., real time status information is uploaded to by central control unit by CAN；Center
Control unit is provided with and function is locally displayed, and core energy storage component and system running state are carried out into real-time display, meanwhile, pass through
Real-time traffic information is uploaded to comprehensive monitoring system by GPRS wireless communication modules, realizes distal end intelligent management.
In addition, it is connected with inversion control unit 31 between the central control unit 8 and the inverter 3；The center
Variable flow control unit 21 is connected between control unit 8 and the two way convertor 2.
Present invention also offers a kind of potential energy recovery method of crane gear, the potential energy recovery method uses any of the above-described kind
The potential energy recovery system of crane gear, comprises the following steps in embodiment：
When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, center control
Unit control inversion control unit by inverter by Way of Regenerating Energy Feedback to AC network, while monitor the three-phase alternating current of power network
The voltage of pressure and dc bus electricity, when the energy of inversion feedback exceedes the consumable energy of AC institute, center control is single
Member control inversion control unit reduces the power of inversion feedback, while central control unit controls converter control unit by two-way
Current transformer will regenerate energy and electric capacity will be charged, and with storage energy, reach collaboration voltage stabilizing；
When the potential energy energy of regenerative braking reaches peak point, central control unit control converter control unit makes two-way
Current transformer increases storage power；
When below potential energy energy to the consumable energy of AC institute of regenerative braking, central control unit control inversion
Control unit by inverter by Way of Regenerating Energy Feedback to AC network, until direct current net pressure recovers normal value；
When crane gear raising or the urgent power of needs are supported, central control unit controls converter control unit by double
The energy that electric capacity stores is discharged to current transformer, suppresses falling for direct current net voltage.
In addition, when crane gear is down or up, capacitor charge and discharge concretely comprises the following steps：
When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, two-way changing
Device detects the voltage of dc bus electricity in real time, after the voltage of dc bus electricity is increased to first predetermined value, control electric capacity charging；
When the voltage of dc bus electricity drops to normal value, reversible transducer stops charging for electric capacity；
When crane gear rises, the voltage of dc bus electricity declines, and reversible transducer detects that voltage drops to second
Discharged after predetermined value to electric capacity；
When the voltage of dc bus electricity rises to normal value, converter stops discharging for electric capacity.
In addition, in above-mentioned, when energy-storage units or inverter break down out of service, central control unit monitoring failure
State, and control energy-storage units or inverter out of service, until trouble shooting；When under malfunction, potential energy regeneration energy is big
When crane gear maximum recovery ability, start braking resistor and consumed, with protection equipment safety.
By the above-mentioned technical proposal of the present invention, it has advantages below：(1) system combining super capacitor of the invention storage
Energy advantage and inversion feedback advantage, solve the energy-saving efficiency of regeneration energy, reduce input financial cost, reduce simultaneously
Equipment volume size；(2) present invention coordinates control, avoids impact and anti-power transmission phenomenon of the inversion feedback to AC network；
(3) running status of present invention energy real time intelligent control device, improves equipment control intelligence degree.
Claims (7)
1. a kind of potential energy recovery system of crane gear, including the rectification unit of power network is connected to, by the three-phase alternating current of power network
Electricity is converted to direct current, forms bus direct current, and the output end of the rectification unit is connected with converter unit, the converter unit
Output end be connected with the motor that energy can be provided for crane gear, it is characterised in that：Further comprise being connected to the inverse of power network
Become device, the DC output end of the inverter is connected to the output end of the rectification unit；The inverter parallel has and can deposited
The energy-storage units for storing up or releasing energy, the output end of the energy-storage units are connected to the output end of the rectification unit；It is described inverse
The output end for becoming device is connected with the braking resistor that regeneration energy can be converted into thermal energy consumption, and braking resistor connects energy storage list simultaneously
The output end of member and the output end of rectification unit.
2. the potential energy recovery system of crane gear according to claim 1, it is characterised in that：The energy-storage units include entering
The electric capacity of row discharge and recharge, the capacitance connection have the reversible transducer that direct current can be converted to direct current, to control the electric capacity
Discharge and recharge；The other end of the reversible transducer is connected to the output end of the rectification unit.
3. the potential energy recovery system of crane gear according to claim 2, it is characterised in that：Further comprising can be real to system
When the central control unit that monitors, the capacitance state can be gathered by being connected between the electric capacity and the central control unit
CMS units, the CMS element memories have CAN, and it is single that the status information of electric capacity is uploaded into center control in real time
Member.
4. the potential energy recovery system of crane gear according to claim 3, it is characterised in that：The central control unit and institute
State and be connected with inversion control unit between inverter；Unsteady flow is connected between the central control unit and the two way convertor
Control unit.
5. a kind of potential energy recovery method of crane gear, usage right requires that the potential energy of crane gear any one of 1-4 returns
Receipts system, it is characterised in that：Comprise the following steps：
When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, central control unit
Control inversion control unit by inverter by Way of Regenerating Energy Feedback to AC network, while monitor the three-phase alternating voltage of power network with
And the voltage of dc bus electricity, when the energy of inversion feedback exceedes the consumable energy of AC institute, central control unit control
Inversion control unit processed reduces the power of inversion feedback, while central control unit controls converter control unit by Bidirectional variable-flow
Device will regenerate energy and electric capacity will be charged, and with storage energy, reach collaboration voltage stabilizing；
When the potential energy energy of regenerative braking reaches peak point, central control unit control converter control unit makes Bidirectional variable-flow
Device increases storage power；
When below potential energy energy to the consumable energy of AC institute of regenerative braking, central control unit control inversion control
Unit by inverter by Way of Regenerating Energy Feedback to AC network, until direct current net pressure recovers normal value；
When crane gear raising or the urgent power of needs are supported, central control unit controls converter control unit by two-way change
Stream device is discharged the energy that electric capacity stores, and suppresses falling for direct current net voltage.
6. the potential energy recovery method of crane gear according to claim 5, it is characterised in that：It is down or up in crane gear
When, capacitor charge and discharge concretely comprises the following steps：
When crane gear declines, and the potential energy energy of regenerative braking causes the voltage rise of dc bus electricity, reversible transducer is real
When detect dc bus electricity voltage, when dc bus electricity voltage be increased to first predetermined value after, control electric capacity charging；
When the voltage of dc bus electricity drops to normal value, reversible transducer stops charging for electric capacity；
When crane gear rises, the voltage of dc bus electricity declines, and it is predetermined that reversible transducer detects that voltage drops to second
Discharged after value to electric capacity；
When the voltage of dc bus electricity rises to normal value, converter stops discharging for electric capacity.
7. according to the potential energy recovery method of the crane gear of claim 5 or 6, it is characterised in that：When energy-storage units or inversion
When device breaks down out of service, central control unit monitoring malfunction, and control energy-storage units or inverter out of service,
Until trouble shooting；When under malfunction, when potential energy regeneration energy is more than crane gear maximum recovery ability, startup braking resistor
Consumed, with protection equipment safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710627946.4A CN107359641A (en) | 2017-07-28 | 2017-07-28 | The potential energy recovery system and its recovery method of crane gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710627946.4A CN107359641A (en) | 2017-07-28 | 2017-07-28 | The potential energy recovery system and its recovery method of crane gear |
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| Publication Number | Publication Date |
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| CN107359641A true CN107359641A (en) | 2017-11-17 |
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| CN201710627946.4A Pending CN107359641A (en) | 2017-07-28 | 2017-07-28 | The potential energy recovery system and its recovery method of crane gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441631A (en) * | 2019-07-31 | 2019-11-12 | 中车青岛四方车辆研究所有限公司 | Potential energy recycling and reusing energy storage device pilot system and method |
| CN111817330A (en) * | 2020-07-22 | 2020-10-23 | 佛山维可特科技有限公司 | Crane energy storage monitoring and scheduling system and scheduling method thereof |
| CN113162109A (en) * | 2021-03-16 | 2021-07-23 | 江苏政田重工股份有限公司 | Energy supply and recovery system for marine crane and energy recovery and reuse method based on energy supply and recovery system |
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| US20110156620A1 (en) * | 2009-12-25 | 2011-06-30 | Silitek Electronic (Guangzhou) Co., Ltd. | Battery protection system and method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110441631A (en) * | 2019-07-31 | 2019-11-12 | 中车青岛四方车辆研究所有限公司 | Potential energy recycling and reusing energy storage device pilot system and method |
| CN111817330A (en) * | 2020-07-22 | 2020-10-23 | 佛山维可特科技有限公司 | Crane energy storage monitoring and scheduling system and scheduling method thereof |
| CN111817330B (en) * | 2020-07-22 | 2021-12-07 | 佛山维可特科技有限公司 | Crane energy storage monitoring and scheduling system and scheduling method thereof |
| CN113162109A (en) * | 2021-03-16 | 2021-07-23 | 江苏政田重工股份有限公司 | Energy supply and recovery system for marine crane and energy recovery and reuse method based on energy supply and recovery system |
| CN113162109B (en) * | 2021-03-16 | 2024-03-12 | 江苏政田重工股份有限公司 | Marine crane energy supply and recovery system and energy recovery and reuse method based on same |
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