CN109149634A - Regeneration energy recycling system and control method based on flywheel energy storage and inversion feedback - Google Patents
Regeneration energy recycling system and control method based on flywheel energy storage and inversion feedback Download PDFInfo
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- CN109149634A CN109149634A CN201810992524.1A CN201810992524A CN109149634A CN 109149634 A CN109149634 A CN 109149634A CN 201810992524 A CN201810992524 A CN 201810992524A CN 109149634 A CN109149634 A CN 109149634A
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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
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention relates to urban track traffics to regenerate technical field of energy recovery, more particularly to a kind of regeneration energy recycling system based on flywheel energy storage and inversion feedback, comprising: at least one inversion feedback module, at least one flywheel energy storage feedback module, detection module and voltage sensor, inversion feedback module and the mutually coordinated work of flywheel energy storage feedback module in the system, energy is regenerated based on inversion feedback, regeneration energy is made full use of, solves the problems, such as that electric energy is sent；In addition, flywheel energy storage feedback module does not need to configure by maximum absorption power demand, the overall economy quality and energy-saving effect of system are more preferably than single inversion feedback and flywheel energy storage feedback；The system control method provided by the invention, inversion feedback module decouple in control with flywheel energy storage feedback module, are not need to rely on and are in communication with each other, and reduce the complexity of system control, have scalability, facilitate construction and O&M.
Description
Technical field
The present invention relates to urban track traffics to regenerate technical field of energy recovery, and in particular to is based on flywheel energy storage and inversion
The regeneration energy recycling system and control method of feedback.
Background technique
In the operation cost of the rail traffics such as subway, the electricity charge account for about 30~40%.Current track train generallys use transformation
The kind of drive of frequency conversion (VVVF) can use electric energy feedback to drawing electric network for other trains, this portion in train braking
Divide regenerating braking energy considerable, regenerating braking energy accounts for about the 30% of the total electric energy of train traction in the drawing electric network having,
With the very big energy saving space.
Common regenerating braking energy absorption pattern mainly includes following several technologies: resistance energy-dissipating type, super capacitor storage
It can type, flywheel energy storage type and inversion feedback type.These types of technology, which absorbs field in rail traffic regenerating braking energy, application,
Every kind of technology has the characteristics that its respectively.
The regenerating braking energy that resistance energy-dissipating type regenerating braking energy absorption plant generates train is on resistance with thermal energy
Form consumed.The type device technique is mature, and structure is simple, easy to control, stable.Major defect is will to regenerate
Braking energy is converted into thermal energy consumption and falls, and causes energy waste, and will lead to temperature in subway tunnel or station and increase.
Super capacitor energy storage type energy back feed device is stored the regenerating braking energy of train to big using bidirectional converter
In capacity capacitor group, when having train starting, acceleration to need to drain, which discharges electric energy, carries out energy recycling.It should
Types of devices only carries out ability in direct current system and absorbs and releases, and has certain energy-saving effect, will not influence AC system.Mainly
The disadvantage is that using supercapacitor as storage medium, current super capacitor charging/discharging cycle life is short, cost is high.
Flywheel energy storage type energy back feed device connects on DC bus, the regenerative braking electric energy that train braking can be generated
The kinetic energy for being converted into flywheel turns stores, and is converted to power output when launch train or acceleration, then by the kinetic energy of flywheel,
Realize the recycling of regenerating braking energy.The type service using life is up to 20 years, and O&M cost is low；It is direct to regenerate energy
It is converted in direct current system, does not influence AC system, energy-saving effect is good.
Regenerating braking energy is directly fed back to middle pressure ring net or interior 400V low pressure of standing by inversion feedback type energy absorbing device
Power grid does not configure energy-storage travelling wave tube.Train regenerating braking energy is utilized in the type device part, and there is certain energy conservation to make
With, but it is constrained to low-pressure side load capacity or medium voltage side load capacity, regenerative electric energy are not fully utilized, it is possible to electricity
It nets power transmission, influences the relay protection and power quality of power supply system.
In order to solve the problems, such as the recycling of rail traffic regenerating braking energy, only it is difficult by certain single product in skill
It is optimal simultaneously in terms of art aspect of performance and economic indicator.Inversion feedback device can be direct toward exchange side feedback energy, but
The energy of feedback is pulsed, cannot be dissolved completely by station internal loading；Flywheel energy storage feedback device can deposit excess energy
Storage gets up to recycle, and energy-saving effect is good.
In consideration of it, overcoming the above defect in the prior art, the new regeneration based on flywheel energy storage and inversion feedback is provided
Energy recycling system and control method become this field technical problem urgently to be resolved.
Summary of the invention
It is an object of the invention in view of the above drawbacks of the prior art, provide based on flywheel energy storage and inversion feedback again
Raw energy recycling system and control method.
The purpose of the present invention can be realized by technical measures below:
The regeneration energy recycling system based on flywheel energy storage and inversion feedback that the present invention provides a kind of, the system include:
For export higher level's power grid that electric energy powers to track, be electrically connected with higher level's power grid for exporting electric energy to train
The drawing electric network of power supply, the drawing electric network include be electrically connected DC bus and ac bus, the drawing electric network with it is described
The first transformer of the alternating voltage conveyed for changing higher level's power grid, first transformer are equipped between higher level's power grid
Side connect with higher level's power grid, the other side of first transformer is connect with the ac bus, and the exchange is female
Electrical equipment in station, the system are connected on line further include:
At least one inversion feedback module, the inversion feedback module be set to the DC bus and the ac bus it
Between, and connect respectively with the DC bus and ac bus, it is generated when the inversion feedback module is for by train braking
Way of Regenerating Energy Feedback is used to ac bus for electrical equipment in standing；
At least one flywheel energy storage feedback module, the flywheel energy storage feedback module is connect with the DC bus, described
Dump energy after flywheel energy storage module absorbs the inversion feedback module is converted to kinetic energy storage or turns the kinetic energy of storage
Electric energy release is melted into use for train；
The detection module being separately connected with first transformer and the inversion feedback module, the detection module are used for
The active power size of the first transformer of real-time detection and direction, the inversion feedback module according to the active power size and
The size of direction change feedback power；
Voltage sensor on DC bus, for detecting DC bus-bar voltage；
The inversion feedback module changes with the flywheel energy storage feedback module according to the testing result of the voltage sensor
Become operating status.
Preferably, the inversion feedback module includes for the inverter of DC-AC conversion and for changing described inverse
Become the second transformer of the alternating voltage of device conveying, one end of the inverter is connect with the DC bus, the inverter
The other end connect with second transformer one end, the second transformer other end is connect with the ac bus, described
The DC voltage of DC bus carries out DC-AC by inverter and converts output AC voltage, conveys by the second transformer
The alternating voltage of adaptation is to ac bus.
Preferably, the detection module includes current transformer for detecting the electric current of the first transformer, for detecting
The voltage transformer of ac bus voltage and electricity for being detected respectively according to the current transformer, the voltage transformer
Stream, voltage calculate the processing unit in active power size and direction, the processing unit respectively with the current transformer, voltage
Mutual inductor electrical connection.
Preferably, the current transformer is set between the ac bus and first transformer, and the electric current is mutual
The output end of sensor is connect with the inverter, and one end of the voltage transformer is connect with the ac bus, the other end with
The inverter connection.
Preferably, the detection module includes for directly reading the first transformer active power size and direction
Intelligent electric energy meter.
Preferably, the flywheel energy storage feedback module include for DC-AC conversion, AC-DC conversion it is two-way
Current transformer and the flywheel energy storage unit converted for electric energy-kinetic energy conversion, kinetic energy-electric energy, the DC side of the bidirectional converter
It is connect with the DC bus, the exchange side of the bidirectional converter is connect with the flywheel energy storage unit.
The present invention also provides a kind of regeneration energy recycling systems applied to above-mentioned based on flywheel energy storage and inversion feedback
Control method, which includes:
The active power size of the first transformer of detection module real-time detection and direction, inversion feedback module have according to
Function watt level and direction change the size of feedback power；
Voltage sensor acquires DC bus-bar voltage, the inversion feedback module and the flywheel energy storage feedback module according to
The DC bus-bar voltage changes operating status.
Preferably, the operating status of the flywheel energy storage feedback module includes: charging, electric discharge, standby, the inversion feedback
The operating status of module includes: to absorb, is standby.
Preferably, when train braking, threshold value is absorbed when DC bus-bar voltage is greater than or equal to first, inversion feedback module is inhaled
It receives；When DC bus-bar voltage absorbs threshold value less than first, inversion feedback module is standby.
Preferably, when DC bus-bar voltage is greater than or equal to first and absorbs threshold value,
If DC bus-bar voltage absorbs threshold value less than second, flywheel energy storage feedback module is standby；
If DC bus-bar voltage, which is greater than or equal to second, absorbs threshold value, the charging of flywheel energy storage feedback module.
Preferably, launch train or accelerate when, when DC bus-bar voltage be less than or equal to discharge threshold when, flywheel energy storage return
Device electric discharge is presented, inversion feedback module is standby；When DC bus-bar voltage is greater than discharge threshold, flywheel energy storage feedback device is waited for
Machine, inversion feedback module are standby.
Inversion feedback module and the mutually coordinated work of flywheel energy storage feedback module in system of the invention, regenerate energy with
Based on inversion feedback, supplemented by flywheel energy storage feedback, inversion feedback module provides most absorption power, absorbs most energy
Amount, in the case where the underpower of inversion feedback module feedback by the power load for interior electrical equipment of standing to be dissolved, to prevent
Electric energy is sent, and flywheel energy storage feedback module just comes into operation, and remaining regeneration energy is stored for use, regeneration is made full use of
Energy solves the problems, such as that electric energy is sent；In addition, flywheel energy storage feedback module does not need to match by maximum absorption power demand
It sets, the overall economy quality and energy-saving effect of system are more preferably than single inversion feedback and flywheel energy storage feedback；It is provided by the invention
The system control method, inversion feedback module decouple in control with flywheel energy storage feedback module, are not need to rely on phase intercommunication
Letter reduces the complexity of system control, has scalability, facilitates construction and O&M.
Detailed description of the invention
Fig. 1 is the composed structure schematic diagram of system of the invention.
Fig. 2 is the step flow chart of the control method of system of the invention.
Fig. 3 is the control method flow chart of the various states of system of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation
Invention is further described in detail for example.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
In order to keep the narration of this disclosure more detailed with it is complete, below for embodiments of the present invention and specific real
It applies example and proposes illustrative description；But this not implements or uses the unique forms of the specific embodiment of the invention.Embodiment
In cover multiple specific embodiments feature and to construction with operate these specific embodiments method and step it is suitable with it
Sequence.However, can also reach identical or impartial function and sequence of steps using other specific embodiments.
The regeneration energy recycling system based on flywheel energy storage and inversion feedback that the present invention provides a kind of, referring to Figure 1, figure
1 shows a kind of regeneration energy recycling system based on flywheel energy storage and inversion feedback, the system include: for export electric energy to
Higher level's power grid 10 of track power supply, the drawing electric network for exporting electric energy to train power supply being electrically connected with higher level's power grid 10, lead
Draw power grid include be electrically connected DC bus 20 and ac bus 30, between drawing electric network and higher level's power grid 10 be equipped with for changing
First transformer 40 of the alternating voltage that higher level's power grid 10 conveys, the side of the first transformer 40 are connect with higher level's power grid 10, the
The other side of one transformer 40 is connect with ac bus 30, and electrical equipment in station is connected on ac bus 30 and (is not shown in figure
Out), system further include: at least one inversion feedback module 50, at least one flywheel energy storage feedback module 60, detection module
(not shown) and voltage sensor (not shown).
Further, referring to Figure 1, inversion feedback module 50 is set between DC bus 20 and ac bus 30, and point
It is not connect with DC bus 20 and ac bus 30；Flywheel energy storage feedback module 60 is connect with DC bus 20；Detection module with
First transformer 40 and inversion feedback module 50 are separately connected, and detection module is used for the wattful power of the first transformer of real-time detection 40
Rate size and direction, inversion feedback module 50 change the size of feedback power according to active power size and direction；Voltage sensor
Device is set on DC bus 20, for detecting 20 voltage of DC bus, inversion feedback module 50 and flywheel energy storage feedback module 60
Change operating status according to 20 voltage of DC bus.
Further, inversion feedback module 50 can be configured according to application demand, and multiple inversion feedback modules 50 are simultaneously
Join work to improve power configuration.When train braking, inversion feedback module 50 is by direct current energy regenerated in DC bus 20
It is reverse into AC energy, and feeds back in ac bus 30 and is used for electrical equipment in standing, makes full use of regeneration energy.
Further, flywheel energy storage feedback module 60 can be configured according to application demand, multiple flywheel energy storage feedbacks
60 parallel operation of module is to improve power and stored energy capacitance.When train braking, flywheel energy storage feedback module 60 is by inversion feedback
Dump energy after module 50 absorbs is converted to kinetic energy storage, when launch train or acceleration, flywheel energy storage feedback module
Kinetic energy is converted to electric energy by 60 to be used for train.
Further, the voltage rating of ac bus 30 is 0.4kV, 10kV or 35kV.
Further, the voltage rating of DC bus 20 is 750V or 1500V.
In the present embodiment, when train braking, in the Way of Regenerating Energy Feedback to DC bus 20 of generation, DC bus 20
Voltage increase, be 20 voltage of stable DC bus in range of set value, guarantee that train is normal, safe operation, when voltage passes
Sensor detects that the voltage of DC bus 20 is greater than or equal to first and absorbs threshold value, and inversion feedback module 50 will be in DC bus 20
Regenerated direct current energy is reverse into AC energy, and feeds back in ac bus 30 and use for electrical equipment in standing, and makes full use of
Energy is regenerated, while the active power size of the first transformer of detection module real-time detection 40 and direction and judging ac bus 30
Electric energy whether can give toward higher level's power grid 10, before the energy of falling power transmission, inversion feedback module 50 reduces transmission power, together with this
When, 20 voltage of DC bus continues to increase, if voltage sensor detects that 20 voltage of DC bus is greater than or equal to second and absorbs
Threshold value, flywheel energy storage feedback module 60 just will start operation, and remaining regeneration energy is converted to kinetic energy storage, works as train
When starting or acceleration, when 20 voltage of DC bus is less than or equal to discharge threshold, flywheel energy storage feedback module 60 will be stored
Kinetic energy is converted to electric energy and releases for train use.
In the present embodiment, inversion feedback module 50 and the mutually coordinated work of flywheel energy storage feedback module 60, regenerate energy with
Based on inversion feedback, supplemented by flywheel energy storage feedback, inversion feedback module 50 provides most absorption power, absorbs most
Energy, the underpower of 50 feedback of inversion feedback module with by stand in electrical equipment power load dissolve in the case where, be
Prevent electric energy from sending, flywheel energy storage feedback module 60 just comes into operation, and remaining regeneration energy is stored for use, sufficiently benefit
With regeneration energy, solve the problems, such as that electric energy is sent；In addition, flywheel energy storage feedback module 60 is not needed by maximum absorption power
Demand configuration, the overall economy quality and energy-saving effect of system are more preferably than single inversion feedback and flywheel energy storage feedback.
Further, referring to Figure 1, inversion feedback module 50 includes the inverter 501 for DC-AC conversion and uses
In the second transformer 502 for changing the alternating voltage that inverter 501 conveys, the DC side and DC bus 20 of inverter 501 connect
It connects, the exchange side of inverter 501 is connect with 502 one end of the second transformer, and 502 other end of the second transformer and ac bus 30 connect
It connects, the DC voltage of DC bus 20 carries out DC-AC by inverter 501 and converts output AC voltage, becomes by second
The alternating voltage of the conveying adaptation of depressor 502 is to ac bus 30.
Further, referring to Figure 1, electrical equipment includes: air-conditioning, illumination, elevator, ventilation blower, rays safety detection apparatus, letter in standing
Number system and monitoring system etc..When train braking, inversion feedback module 50 is inverse by direct current energy regenerated in DC bus 20
Become AC energy, and feed back in ac bus 30 for stand in electrical equipment use, when 50 feedback of inversion feedback module again
When raw energy cannot be dissolved completely by electrical equipment in station, flywheel energy storage feedback module 60 is by remaining energy in the form of kinetic energy
It storing, on the one hand the present embodiment realizes regeneration energy and makes full use of, and it is energy saving, on the other hand prevent inversion feedback mould
The electric energy of 50 feedback of block is sent toward higher level's power grid 10.
Further, referring to Figure 1, detection module includes the current transformer for detecting the electric current of the first transformer 40
70, for detecting the voltage transformer 80 of 30 voltage of ac bus and for being divided according to current transformer 70, voltage transformer 80
The electric current that does not detect, voltage calculate the processing unit (not shown) in active power size and direction, processing unit respectively with
Current transformer 70, voltage transformer 80 are electrically connected.
Further, in the present embodiment, referring to Figure 1, current transformer 70 is set to ac bus 30 and first and becomes
Between depressor 40, the output end of current transformer 70 is connect with inverter 501, one end of voltage transformer 80 and ac bus 30
Connection, the other end are connect with inverter 501.
In other preferred embodiments, detection module includes big for directly reading 40 active power of the first transformer
Small and direction intelligent electric energy meter simplifies system device setting, convenient, fast, intuitively obtain 40 wattful power of the first transformer
Rate size and direction.
On the basis of the above embodiments, in the present embodiment, referring to Figure 1, flywheel energy storage feedback module 60 includes being used for
The bidirectional converter 601 and converted for electric energy-kinetic energy conversion, kinetic energy-electric energy that DC-AC conversion, AC-DC are converted
The DC side of flywheel energy storage unit 602, bidirectional converter 601 is connect with DC bus 20, the exchange side of bidirectional converter 601 with
Flywheel energy storage unit 602 connects.
Specifically, when train braking, 20 voltage of DC bus is increased, and bidirectional converter 601 controls active power from straight
Stream bus 20 flows to flywheel energy storage unit 602, and flywheel energy storage unit 602 is worked with the mode of motor, in DC bus 20 again
Raw direct current energy is converted into kinetic energy；When launch train or acceleration, 20 voltage of DC bus decline, bidirectional converter 601 is controlled
Active power processed flows to DC bus 20 from flywheel energy storage unit 602, and flywheel energy storage unit 602 is worked with the mode of generator,
The kinetic energy that flywheel energy storage unit 602 stores is converted to direct current energy.Bidirectional converter 601 can be according to 20 voltage of DC bus
The size of variation adjustment power, makes 20 voltage stabilization of DC bus in range of set value.
The flywheel energy storage unit 602 of the present embodiment realizes the mutual conversion between kinetic energy and electric energy, with generator mode work
When making, the kinetic energy of storage is converted to electric energy and discharged by flywheel energy storage unit 602, belongs to physics energy storage, no pollution to the environment, flywheel
Long service life, the O&M cost of energy storage feedback module 60 are low, energy-saving effect is good.
The present invention also provides a kind of regeneration energy regenerating systems applied to above-mentioned based on flywheel energy storage and inversion feedback
The control method of system, refers to Fig. 2, the regeneration energy recycling system based on flywheel energy storage and inversion feedback that Fig. 2 shows a kind of
Control method, which includes:
Step S1: the active power size of the first transformer of detection module real-time detection 40 and direction, inversion feedback module
50 change the size of feedback power according to the direction of active power；
Step S2: voltage sensor acquires 20 voltage of DC bus, inversion feedback module 50 and flywheel energy storage feedback module
60 change operating status according to 20 voltage of DC bus.
Further, the operating status of flywheel energy storage feedback module 60 includes: charging, electric discharge, standby, inversion feedback module
50 operating status includes: to absorb, is standby.
Further, when train braking, threshold value, inversion feedback mould are absorbed when 20 voltage of DC bus is greater than or equal to first
Block 50 absorbs, and when 20 voltage of DC bus absorbs threshold value less than first, inversion feedback module 50 is standby.
Further, when 20 voltage of DC bus is greater than or equal to first and absorbs threshold value,
If 20 voltage of DC bus absorbs threshold value less than second, flywheel energy storage feedback module 60 is standby；
If 20 voltage of DC bus, which is greater than or equal to second, absorbs threshold value, flywheel energy storage feedback module 60 charges.
Further, launch train or accelerate when, when 20 voltage of DC bus be less than or equal to discharge threshold when, flywheel storage
Energy feedback device electric discharge, inversion feedback module 50 are standby；
When 20 voltage of DC bus be greater than discharge threshold when, flywheel energy storage feedback device is standby, inversion feedback module 50 to
Machine.
Specifically, the working condition of the system and control method under corresponding states are as follows:
Fig. 3 is referred to, when 20 voltage of DC bus is in range of set value, as shown in state 2, i.e., DC bus 20 is electric
When pressure absorbs threshold value less than first and is greater than discharge threshold, inversion feedback module 50 and flywheel energy storage feedback module 60 be in
Machine state is converted without energy.
When train braking, energy is regenerated to 20 feedback of DC bus, 20 voltage of DC bus increases, voltage sensor inspection
20 voltage of DC bus is surveyed, when 20 voltage of DC bus, which is greater than or equal to first, absorbs threshold value, inversion feedback module 50 starts
To 30 feedback power of ac bus, feedback power increases with 20 voltage of DC bus and is increased, as shown by state 3, if direct current is female
20 voltage of line absorbs threshold value less than second, is all absorbed by the power of 50 feedback of inversion feedback module by electrical equipment in station,
Ac bus 30 will not be toward 10 energy of falling power transmission of higher level's power grid, and the active power direction of the first transformer 40 is always the first transformer
40 flow to drawing electric network, and the maximum power of 50 feedback of inversion feedback module is no more than peak power rating, by 20 electricity of DC bus
Voltage-controlled system is in range of set value, and flywheel energy storage feedback module 60 is standby at this time, converts without energy.As shown in state 4, if
It cannot all be absorbed by electrical equipment in station by the power of 50 feedback of inversion feedback module, in order not to be sent toward higher level's power grid 10
Electric energy, inversion feedback module 50 limit feedback power, reduce feedback power, the first transformer of detection module real-time detection 40
Active power direction, keeping the active power direction of the first transformer 40 is always that the first transformer 40 flows to drawing electric network, with
20 voltage of DC bus continue to increase, when 20 voltage of DC bus be greater than or equal to second absorb threshold value, flywheel energy storage feedback
The starting charging of module 60, the size of charge power is controlled by bidirectional converter 601, and then control 20 voltage stabilization of DC bus
In range of set value.With the development of train braking process, regenerates energy and be gradually reduced, 20 voltage of DC bus is also under
Drop, when 20 voltage of DC bus absorbs threshold value less than second, flywheel energy storage feedback module 60 automatically exits from charged state.Work as column
Vehicle end of braking, when 20 voltage of DC bus absorbs threshold value less than first, inversion feedback module 50 also exits absorbing state, enters
Standby mode.
Fig. 3 is referred to, as shown in state 1, when train is in starting or acceleration mode, 20 voltage of DC bus declines, when
When 20 voltage of DC bus is less than or equal to discharge threshold, flywheel energy storage feedback module 60 starts to discharge, by stored kinetic energy
It is converted to electric energy release, power is controlled by bidirectional converter 601, DC bus 20 is flowed to by flywheel energy storage unit 602, controlled
In range of set value, inversion feedback module 50 is in standby 20 voltage stabilization of DC bus.
The control method of the system in the present embodiment, inversion feedback module 50 are being controlled with flywheel energy storage feedback module 60
Upper decoupling, is not need to rely on and is in communication with each other, and reduces the complexity of system control, has scalability, facilitates construction and fortune
Dimension.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (11)
1. a kind of regeneration energy recycling system based on flywheel energy storage and inversion feedback, the system include:
For export higher level's power grid that electric energy powers to track, be electrically connected with higher level's power grid for exporting electric energy to train power supply
Drawing electric network, the drawing electric network includes the DC bus and ac bus being electrically connected, the drawing electric network and the higher level
The first transformer equipped with the alternating voltage conveyed for changing higher level's power grid between power grid, the one of first transformer
Side is connect with higher level's power grid, and the other side of first transformer is connect with the ac bus, on the ac bus
It is connected with electrical equipment in station, which is characterized in that the system further include:
At least one inversion feedback module, the inversion feedback module are set between the DC bus and the ac bus,
And it is connect respectively with the DC bus and ac bus, the regeneration generated when the inversion feedback module is for by train braking
Energy feedback is used to ac bus for electrical equipment in standing；
At least one flywheel energy storage feedback module, the flywheel energy storage feedback module are connect with the DC bus, the flywheel
Dump energy after energy-storage module absorbs the inversion feedback module is converted to kinetic energy storage or is converted to the kinetic energy of storage
Electric energy release is used for train；
The detection module being separately connected with first transformer and the inversion feedback module, the detection module is for real-time
Active power size and the direction of the first transformer are detected, the inversion feedback module is according to the active power size and direction
Change the size of feedback power；
Voltage sensor on DC bus, for detecting DC bus-bar voltage；
The inversion feedback module and the flywheel energy storage feedback module change according to the testing result of the voltage sensor to be transported
Row state.
2. the regeneration energy recycling system according to claim 1 based on flywheel energy storage and inversion feedback, which is characterized in that
The inversion feedback module includes the inverter for DC-AC conversion and the alternating current for changing inverter conveying
Second transformer of pressure, one end of the inverter connect with the DC bus, the other end of the inverter and described the
The connection of two transformer one end, the second transformer other end are connect with the ac bus, the direct current of the DC bus
Pressure carries out DC-AC by inverter and converts output AC voltage, and the alternating voltage by the second transformer conveying adaptation is given
Ac bus.
3. the regeneration energy recycling system according to claim 2 based on flywheel energy storage and inversion feedback, which is characterized in that
The detection module includes the current transformer for detecting the electric current of the first transformer, the electricity for detecting ac bus voltage
Mutual inductor and electric current, voltage for being detected respectively according to the current transformer, the voltage transformer is pressed to calculate wattful power
The processing unit in rate size and direction, the processing unit are electrically connected with the current transformer, voltage transformer respectively.
4. the regeneration energy recycling system according to claim 3 based on flywheel energy storage and inversion feedback, which is characterized in that
The current transformer is set between the ac bus and first transformer, the output end of the current transformer and institute
Inverter connection is stated, one end of the voltage transformer is connect with the ac bus, and the other end is connect with the inverter.
5. the regeneration energy recycling system according to claim 2 based on flywheel energy storage and inversion feedback, which is characterized in that
The detection module includes the intelligent electric energy meter for directly reading the first transformer active power size and direction.
6. the regeneration energy recycling system described in -5 any one based on flywheel energy storage and inversion feedback according to claim 1,
It is characterized in that, the flywheel energy storage feedback module includes the Bidirectional variable-flow for DC-AC conversion, AC-DC conversion
Device and the flywheel energy storage unit converted for electric energy-kinetic energy conversion, kinetic energy-electric energy, the DC side of the bidirectional converter and institute
DC bus connection is stated, the exchange side of the bidirectional converter is connect with the flywheel energy storage unit.
7. a kind of Regenerated energy applied to described in 1 to 6 any one of the claims based on flywheel energy storage and inversion feedback
Measure the control method of recovery system, which is characterized in that the control method includes:
The active power size of the first transformer of detection module real-time detection and direction, inversion feedback module is according to the wattful power
Rate size and direction change the size of feedback power；
Voltage sensor acquires DC bus-bar voltage, and the inversion feedback module and the flywheel energy storage feedback module are according to
DC bus-bar voltage changes operating status.
8. the control method of the regeneration energy recycling system according to claim 7 based on flywheel energy storage and resistive braking,
It is characterized in that, the operating status of the flywheel energy storage feedback module includes: charging, electric discharge, standby, the inversion feedback module
Operating status include: absorb, it is standby.
9. the control method of the regeneration energy recycling system according to claim 8 based on flywheel energy storage and inversion feedback,
It is characterized in that,
When train braking, threshold value is absorbed when DC bus-bar voltage is greater than or equal to first, inversion feedback module absorbs；
When DC bus-bar voltage absorbs threshold value less than first, inversion feedback module is standby.
10. the control method of the regeneration energy recycling system according to claim 9 based on flywheel energy storage and inversion feedback,
It is characterized in that, when DC bus-bar voltage is greater than or equal to first and absorbs threshold value,
If DC bus-bar voltage absorbs threshold value less than second, flywheel energy storage feedback module is standby；
If DC bus-bar voltage, which is greater than or equal to second, absorbs threshold value, the charging of flywheel energy storage feedback module.
11. the controlling party of the regeneration energy recycling system according to claim 10 based on flywheel energy storage and inversion feedback
Method, which is characterized in that
When launch train or acceleration, when DC bus-bar voltage is less than or equal to discharge threshold, the electric discharge of flywheel energy storage feedback device,
Inversion feedback module is standby；
When DC bus-bar voltage is greater than discharge threshold, flywheel energy storage feedback device is standby, and inversion feedback module is standby.
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