CN106385210B - Continuous current locomotive speed control unit and method based on flexible AC pressure regulation - Google Patents
Continuous current locomotive speed control unit and method based on flexible AC pressure regulation Download PDFInfo
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- CN106385210B CN106385210B CN201610870812.0A CN201610870812A CN106385210B CN 106385210 B CN106385210 B CN 106385210B CN 201610870812 A CN201610870812 A CN 201610870812A CN 106385210 B CN106385210 B CN 106385210B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
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Abstract
The present invention discloses a kind of continuous current locomotive speed control unit and method based on flexible AC pressure regulation, the device includes transformer and the converter plant for converting output adjustable dc voltage, the primary side of transformer connects Traction networks, secondary side connects direct current generator by converter plant, converter plant includes sequentially connected alternating current adjustment module, rectification module and Direct current treatment module, alternating current adjustment module is adjusted based on the alternating current of flexible control access transformer output, rectified module, after Direct current treatment module is converted to required direct current, it is supplied to direct current generator；This method adjusts the first object amount of direct current generator, and limit the second aim parameter by control alternating current adjustment module, realizes locomotive speed control.The present invention can realize that locomotive speed is continuously adjustable based on the locomotive system of former high voltage tap changer, and have the advantages that simple structure, required at low cost, safety and high reliablity.
Description
Technical field
The present invention relates to continuous current locomotive technical field more particularly to a kind of direct current powers based on flexible AC pressure regulation
Locomotive speed control device and method.
Background technique
It is AC voltage adjusting to be carried out by high pressure voltage regulating mode, then pass through when some electrical power locomotive executes speed control at present
Rectifier bridge is shaped to the corresponding motor of direct voltage drive, i.e., the original edge voltage of transformer is adjusted by high voltage tap changer, realizes
Each secondary polygonal voltage of transformer is adjustable, and secondary side alternating current passes through rectifier bridge again and is shaped to the corresponding motor of direct voltage drive, thus
Realize locomotive speed control.Since high voltage tap changer has intrinsic characteristic and shaping modes, thus it is above-mentioned using high pressure tune
It compresses switch and carries out voltage-controlled mode and have the following problems:
1) voltage is unable to that LINEAR CONTINUOUS is adjustable, can only be adjusted according to the fixation step value that tap changer is set；
2) mechanical structure that tap changer uses, high production cost and machinery extremely stringent to machining and material requirements
Structure is easy to be out of order, and is also not easy to repair；
3) transformer primary side is flanked into supply conductor voltage, rated value AC25kV, and tap changer is arranged in transformer high-voltage
Side, when adjusting, are likely to occur phenomenon of arc discharge, thus usually also need additional arc extinguishing measure, and safety is not high；
4) since the locomotive speed moment is all being adjusted, so that pressure regulation contact acts frequently, thus contact is easily damaged, reliably
Property it is not high, while maintenance cost is high.
For AC-DC locomotive speed control, more commonly used be by the way of the fixed transformation of transformer, then will be fixed
Alternating voltage is shaped to adjustable direct voltage drive direct current motor of locomotive.As shown in Figure 1, after transformer carries out transformation, then
Fixed alternating voltage is shaped to adjustable by transformer secondary side by the silicon unit converter plant being made of diode and thyristor
DC voltage, thus realize locomotive speed adjust.But for the AC-DC locomotive using high voltage adjusting mode, if by high pressure tune
The mode of section is directly changed to the mode of silicon unit DC voltage regulation as shown in Figure 1, since circuit structure differs greatly, Bu Nengfu
With the original rectifier bridge of locomotive, locomotive transformer secondary side winding full-wave rectification bridge, and it must be replaced with thyristor silicon unit, Huo Zhegeng
Transformation depressor is to be changed to existing DC generator vehicle frame control mode for locomotive axle control mode, therefore improvement cost is big, transformation task amount is big,
And the change of control model will also result in certain influence to locomotive application.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind can realize that locomotive speed is continuously adjustable based on the system of former high voltage tap changer, and simple, the required cost with structure
The continuous current locomotive speed control unit and method based on flexible AC pressure regulation of low, safety and high reliablity.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of continuous current locomotive speed control unit based on flexible AC pressure regulation, including transformer and for converting
The converter plant of adjustable dc voltage is exported, the primary side of the transformer connects Traction networks, and secondary side is connected by the converter plant
Direct current generator is connect, the converter plant includes sequentially connected alternating current adjustment module, rectification module and Direct current treatment mould
Block, the alternating current adjustment module is adjusted based on the alternating current that flexible control accesses the transformer output, through described whole
After flow module, Direct current treatment module are converted to required direct current, it is supplied to direct current generator.
Further improvement as apparatus of the present invention: the alternating current adjustment module includes that thyristor interconnected is adjusted
Unit and control unit, described control unit controls the open angle that the thyristor adjusts thyristor in unit, to be based on
Flexible control adjusts the continuously adjustable alternating current of output.
Further improvement as apparatus of the present invention: the thyristor adjusts the thyristor that unit includes two reverse parallel connections
Or the thyristor cell of two groups of reverse parallel connections.
Further improvement as apparatus of the present invention: the alternating current adjustment module further includes that setting is used to examine in motor side
The sensor detection unit of measured motor feedback signal and the synchronization signal transformer that input terminal is set, the sensor detection
Unit, the synchronization signal transformer are connect with described control unit respectively.
Further improvement as apparatus of the present invention: the rectification module is full wave bridge rectifier circuit；The rectification module
Specially full wave bridge rectifier circuit in locomotive.
Further improvement as apparatus of the present invention: the secondary side winding of the transformer includes traction secondary side winding and encourages
Magnetic secondary side winding is by disconnecting the traction secondary side winding of the transformer, the excitation secondary side winding of the access transformer, control
It is transferred to damped condition.
Further improvement as apparatus of the present invention: further including brak control unit interconnected and makes for detecting
The exciting current sensor of exciting current when condition of starting building, it is signal that the brak control unit is fed back according to direct current generator, described
The exciting current of exciting current sensor detection, controls the output voltage of the alternating current adjustment module.
The present invention further provides the control method using above-mentioned continuous current locomotive speed control unit, this method includes
Traction control method, specific steps include:
1) start the speed control unit and obtain traction control instruction, the speed control unit exports DC voltage
Drive direct current generator；
2) when controlling to adjust to locomotive speed, the signal of direct current generator feedback is acquired in real time, is controlled according to the traction
The signal of system instruction and direct current generator feedback, the first object of direct current generator is adjusted by controlling the alternating current adjustment module
Amount, and the second aim parameter of direct current generator is limited.
As the further improvement of the method for the present invention, the alternating current adjustment module includes that thyristor interconnected is adjusted
Unit and control unit, and by direct current generator voltage as first object amount, direct current generator electric current as the second mesh
When scalar, the specific steps of the step 2) are as follows:
2.1) voltage value that acquisition direct current generator is fed back in real time, the voltage mesh being converted to is instructed according to the traction control
The voltage value of scale value and direct current generator feedback, the voltage of direct current generator is adjusted by PID control；
2.2) current value that acquisition direct current generator is fed back in real time, according to the current value of collected direct current generator feedback to straight
The electric current of galvanic electricity machine carries out limitation processing, electric current after output limitation process；Acquisition is set in the alternating current adjustment module input terminal
The synchronization signal that the synchrotrans set are exported, electric current after being handled according to the synchronization signal of acquisition and the limitation,
Pulse train needed for generating, which is sent to, triggers thyristor adjusting unit, to control to adjust locomotive speed, returns
Step 2.1) is executed, until exiting control.
As the further improvement of the method for the present invention, the alternating current adjustment module includes that thyristor interconnected is adjusted
Unit and control unit, and by direct current generator electric current as first object amount, direct current generator voltage as the second mesh
When scalar, the specific steps of the step 2) are as follows:
2.1) current value that acquisition direct current generator is fed back in real time, the electric current mesh being converted to is instructed according to the traction control
The current value of scale value and direct current generator feedback, the electric current of the direct current generator is adjusted by PID；
2.2) voltage value that acquisition direct current generator is fed back in real time, according to the voltage value of collected direct current generator feedback to straight
The voltage of galvanic electricity machine carries out limitation processing, voltage after output limitation process；Needed for being generated according to voltage after limitation processing
Pulse train, which is sent to, triggers thyristor adjusting unit, to control to adjust locomotive speed, returns to step
2.1), until exiting control.
It further include brake control method as the further improvement of the method for the present invention, specific steps include: by the speed
At the traction secondary side winding of transformer described in control device, the excitation secondary side winding of the access transformer and disconnection direct current
Module is managed, execution damped condition is transferred to；The signal of acquisition direct current generator feedback in real time controls the exchange according to the signal of feedback
The input side voltage of electric adjustment module, to control exciting current.
Compared with prior art, the advantages of the present invention is based on the continuous current locomotive speed control units of flexible AC pressure regulation
It is:
1) the present invention is based on the continuous current locomotive speed control units of flexible AC pressure regulation, in former high voltage adjusting mode
On the basis of electric locomotive system, removal high voltage adjusting switch, by the way that alternating current adjustment module is arranged to friendship in transformer secondary side
Galvanic electricity carries out flexible control adjusting, so that transformer secondary side alternating voltage is continuously adjustable, alternating current passes through rectification module, direct current again
Electric treatment module is converted to required DC powered direct current generator, realizes that locomotive engine DC voltage is continuously adjustable, to make
It obtains locomotive speed to be continuously adjusted, compared to the mode that traditional high voltage tap changer is adjusted, maintenance cost is low, and there is no contacts to hold
The problems such as easy to damage and contact arc discharge, can directly be multiplexed rectification circuit etc. in original system without changing locomotive axle control mode
Structure, and cost needed for realization is low, high reliablity；
2) the present invention is based on the continuous current locomotive speed control unit of flexible AC pressure regulation, alternating current adjustment module is into one
Step adjusts unit by thyristor and realizes that alternating current flexible control is adjusted, and may be implemented by the control to thyristor open angle
Alternating current is continuously adjusted, thus compared to direct current regulative mode, it can be realized continuously adjusting for electric moter voltage, to realize
Motor speed continuously adjustable, and reliability is higher；
3) the present invention is based on the continuous current locomotive speed control units of flexible AC pressure regulation in original system circuit logic and
It, can be according to motor in conjunction with the control of alternating current adjustment module by the way that sensor detection unit is arranged on the basis of original protection control
Electric current, voltage feedback signal realize antiaircraft rotation protection, alter vehicle protection and for axle weight transfer of freight locomotive etc..
Compared with prior art, the advantages of control method of continuous current locomotive speed control unit of the present invention, is: this
The control method of invention continuous current locomotive speed control unit, by acquiring the signal of direct current generator feedback in real time and currently leading
Draw control instruction, alternating current adjustment module output quantity be adjusted, realizes the first object amount closed-loop control to direct current generator,
And the second aim parameter is further limited, it is continuously adjustable that locomotive speed may be implemented, while can avoid voltage or current regulation
Beyond normal range (NR), guarantee the safety and reliability adjusted.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of traditional AC-DC locomotive main circuit based on silicon unit DC voltage regulation mode.
Fig. 2 is the structural principle signal of continuous current locomotive speed control unit of the present embodiment based on flexible AC pressure regulation
Figure.
Fig. 3 is the specific structure signal of continuous current locomotive speed control unit in the specific embodiment of the invention (six-axle car)
Figure.
Fig. 4 is the principle schematic diagram that motor braking controls in the specific embodiment of the invention (six-axle car).
Fig. 5 is the implementation process schematic diagram for the traction control method that the present embodiment is controlled based on voltage close loop.
Fig. 6 is the implementation process schematic diagram of traction control method of the present embodiment based on closed-loop current control.
Marginal data: 1, transformer；2, converter plant；21, alternating current adjustment module；22, rectification module；23, direct current
Processing module.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
As shown in Fig. 2, continuous current locomotive speed control unit of the present embodiment based on flexible AC pressure regulation, including transformation
Device 1 and converter plant 2 for converting output adjustable dc voltage, the primary side of transformer 1 connect Traction networks, and secondary side passes through change
It flows device 2 and connects direct current generator, converter plant 2 includes sequentially connected alternating current adjustment module 21, rectification module 22 and straight
Galvanic electricity processing module 23, alternating current adjustment module 21 accesses the alternating current that transformer 1 exports and carries out flexible control adjusting, rectified
After being converted to required direct current after module 22, Direct current treatment module 23, it is supplied to direct current generator.
The present embodiment is based on the electric locomotive system of former high voltage adjusting mode (high voltage tap changer adjusting), removes high pressure tune
Section switch carries out flexible control adjusting to alternating current by the way that alternating current adjustment module 21 is arranged in 1 secondary side of transformer, so that transformation
Device secondary side alternating voltage is continuously adjustable, alternating current passes through rectification module 22 again, Direct current treatment module 23 be converted to it is required straight
Galvanic electricity drives direct current generator, realizes that locomotive engine DC voltage is continuously adjustable, so that locomotive speed continuously adjustable, is compared
In the mode that traditional high voltage tap changer is adjusted, maintenance cost is low, is easily damaged there is no contact and contact arc discharge etc. is asked
Topic can directly be multiplexed the structures such as rectification circuit in original system, and realize required cost without changing locomotive axle control mode
Low, high reliablity.
In the present embodiment, alternating current adjustment module 21 includes that thyristor interconnected adjusts unit and control unit,
Control unit controls the open angle that thyristor adjusts thyristor in unit, adjusts the continuously adjustable exchange of output with flexible control
Electricity.Unit is adjusted by thyristor and realizes that alternating current flexible control is adjusted, and the continuously adjustable of alternating current may be implemented, compared to needle
For the regulative mode of direct current, the continuously adjustable of electric moter voltage can be realized, so as to be continuously adjusted motor speed, and it is reliable
Property is higher.
In the present embodiment, thyristor adjusts the thyristor that unit includes two reverse parallel connections, or according to used brilliant lock
Pipe amount of capacity is made of the thyristor cell of two groups of reverse parallel connections.By adjusting the open angle of thyristor, that is, it is adjusted defeated
Alternating current out.
In the present embodiment, alternating current adjustment module 21 further includes that motor side is arranged in for detecting the biography of motor feedback signals
Sensor detection unit and the synchronization signal transformer that input terminal is set, sensor detection unit, synchronization signal transformer point
It is not connect with control unit.The detection of control unit receiving sensor detection unit all motor feedback signals and synchronization signal become
The synchronization signal of depressor output generates pulse train according to motor feedback signals, synchronization signal, drives direct current generator, Neng Goushi
The closed loop of existing motor speed is adjusted.
The present embodiment is on the basis of original system circuit logic and former protection control, by the way that sensor detection unit is arranged,
Antiaircraft rotation protection can be realized according to the feedback signal of current of electric, voltage in conjunction with controlling for alternating current adjustment module 21, alter vehicle guarantor
Shield and for freight locomotive axle weight transfer etc..
In the present embodiment, rectification module 22 is full wave bridge rectifier circuit；Rectification module 22 is specially full-wave rectification in locomotive
Bridge circuit, i.e. rectification module 22 can directly be multiplexed the full wave bridge rectifier circuit in original system, improve the utilization rate of system, subtract simultaneously
Few cost of implementation.
In the present embodiment, the secondary side winding of transformer 1 includes traction secondary side winding and excitation secondary side winding, passes through access
The traction secondary side winding of transformer 1, the excitation secondary side winding for accessing transformer 1, control are transferred to damped condition.The present embodiment passes through
The excitation secondary side winding of transformer 1 allows to be multiplexed above-mentioned apparatus and constitutes electricity when the excitation secondary side winding of access transformer 1
Machine separate excitation excitation current supply circuit establishes magnetic field to motor by the excitation secondary side winding of transformer 1, and motor is converted from electric motor mode
For generator mode, motor braking circuit keeps constant with original machine vehicle, and the energy that motor issues then is consumed by braking resistor, electricity
Machine is transferred to execution damped condition.
It further include brak control unit interconnected and exciting current when for detecting damped condition in the present embodiment
Exciting current sensor, signal that brak control unit is fed back according to direct current generator, the detection of exciting current sensor excitation
Electric current controls the output voltage of alternating current adjustment module 21.
In the present embodiment, Direct current treatment module 23 include for smooth input direct-current electric current direct current reactor, with
And the DC side Support Capacitor for smooth input direct-current voltage.
In the present embodiment, the input terminal of alternating current adjustment module 21 is additionally provided with overcurrent monitoring sensor, to monitor
Control executes overcurrent protection when over-current state.
The present invention is further illustrated for being applied to six-axle car below.
As shown in figure 3, the present embodiment electric locomotive includes six direct current generators, the motor excitation winding of each direct current generator is logical
It crosses switch (S1.5~S6.5) to connect, each direct current generator connects a converter plant 2, exports direct current by converter plant 2
Electric drive direct current generator constitutes motor driving loop all the way；Transformer 1 is multiwinding transformer, and each connection of converter plant 2 becomes
One group of secondary side tractive winding of depressor 1.Each converter plant 2 include thyristor adjust unit (mc1+ mc1-~mc6+
Mc6-), full wave bridge rectifier circuit (S1.12~S6.12) and DCU motion control unit adjust unit by thyristor and control base
Input ac voltage is adjusted in flexible control, to realize the control of electric moter voltage；The output end of full wave bridge rectifier circuit
Direct current reactor (L1~L6), DC side Support Capacitor (S1.13~S6.13) are set；Motor side is additionally provided with detection motor
The current sensor (A) of current feedback signal, the voltage sensor (V) for detecting electric moter voltage feedback signal, current sensor, electricity
Pressure sensor is connect with DCU motion control unit respectively, by DCU motion control unit according to the motor feedback signals control detected
Combinations brake tube adjusts thyristor all open angles in unit, and the input terminal that thyristor adjusts unit is additionally provided with overcurrent monitoring sensing
Device (T9.1~T9.6).Pass through the secondary side excitation winding of switch S4.19 connection transformer 1 simultaneously in the 4th road motor-drive circuit
T1.11, by switch S4.19 control access excitation winding T1.11, switch S4.1 control access transformer 1 traction secondary around
Group；Exciting current sensor is set simultaneously in the 4th road motor-drive circuit, exciting current sensor is examined in damped condition
Exciting current is surveyed, the voltage that output thyristor adjusts unit is controlled to adjust according to real-time exciting current, to realize exciting current
Control.
By taking first motor M1 circuit as an example, when traction working condition, motor excitation winding (S1.5~S6.5) series connection is disconnected, each
Motor excitation winding individually constitutes electric motor loop with this armature windings in series, further can also be by changing exciting current side
Always the control in locomotive direction is realized, as shown in figure 4, locomotive side can be achieved according to different be shorted in the contact by S1.14 switch
To control；Closure switch S4.1, S4.19 and closure S4.2 is disconnected, i.e. access 1 secondary windings of transformer, disconnection transformer is encouraged
Magnetic winding, the 4th road motor driving loop take electricity from transformer secondary side tractive winding T1.7, drive the 4th motor M4.
When damped condition, it is closed separate excitation winding (S1.5~S6.5), full vehicle motor excitation winding is cascaded；It disconnects
Switch S4.1, closure S4.19 and disconnection S4.2, i.e. disconnection 1 secondary windings of transformer, access static exciter winding, the 4th
Road motor driving loop takes electricity from static exciter winding T1.11, supplies all motor excitation windings of full vehicle, and motor enters braking
Operating condition, motor braking circuit keep former vehicle constant, execute braking using resistive braking mode, as shown in figure 4, wherein S9.1 is system
Dynamic resistance, closure switch S1.4 when damped condition, executes resistive braking to access braking resistor S9.1.
The present embodiment provides 12 pairs of driving pulses by DCU motion control unit, to control corresponding to each direct current generator
Thyristor adjust each thyristor in unit, it is ensured that the equilibrium that each direct current machine power plays, and be able to achieve locomotive axle control, i.e.,
The power of each motor can be individually controlled based on pulse distribution.
The present embodiment utilizes the control method of above-mentioned continuous current locomotive speed control unit, and this method includes traction control
Method, specific steps include:
1) start above-mentioned speed control unit and obtain traction control instruction, above-mentioned speed control unit exports DC voltage
Drive direct current generator；
2) when being controlled to adjust to locomotive speed, the signal of direct current generator feedback is acquired in real time, is referred to according to traction control
The signal of order and direct current generator feedback adjusts the first object amount of direct current generator by control alternating current adjustment module 21, and
Second aim parameter of direct current generator is limited.
The present embodiment first object amount, the second aim parameter specifically may respectively be voltage, electric current, by the electricity for controlling motor
The i.e. adjustable locomotive speed of pressure, electric current.The present embodiment by acquiring the signal and current traction control that direct current generator is fed back in real time
Instruction, is adjusted 21 output quantity of alternating current adjustment module, realizes the first object amount (voltage or electric current) to direct current generator
Closed-loop control, and the second aim parameter (voltage or electric current) of direct current generator is further limited, locomotive speed company may be implemented
Continue it is adjustable, while can avoid adjust exceed normal range (NR), guarantee adjust safety and reliability.
In the present embodiment, alternating current adjustment module 21 includes that thyristor interconnected adjusts unit and control unit
When, it can specifically be realized according to following two mode and locomotive speed is controlled to adjust:
First way: in conjunction with voltage close loop control and current limit link mode
As shown in figure 5, by the voltage of direct current generator as first object amount when, direct current generator electric current as the second target
Amount, the specific steps of step 2) are as follows:
2.1) voltage value that acquisition direct current generator is fed back in real time, the voltage mesh being converted to is instructed according to the traction control
The voltage value of scale value and direct current generator feedback, the voltage of direct current generator is adjusted by PID control；
2.2) current value that acquisition direct current generator is fed back in real time, according to the current value of collected direct current generator feedback to straight
The electric current of galvanic electricity machine carries out limitation processing, electric current after output limitation process；It obtains and is arranged in 21 input terminal of alternating current adjustment module
The synchronization signal that is exported of synchrotrans generated required according to electric current after the synchronization signal of acquisition and limitation processing
Pulse train, which is sent to, triggers thyristor adjusting unit, to control to adjust locomotive speed, returns to step 2.1), directly
It is controlled to exiting.
Direct-current machine counter electromotive formula may be expressed as:
E=Ce Ф n (1)
Wherein Ce is constant and related with electric machine structure, and n is motor speed, is the speed that can determine locomotive by motor speed n
V is spent, Ф is motor magnetic flux amount.
The counter electromotive force of motor E known to above-mentioned formula (1) is directly proportional to locomotive speed, and due to returning per motor driven all the way
Anti- generally only 0.01~0.1 Ω of roadlock, i.e., when speed reaches target value, electric moter voltage is approximately equal to counter electromotive force of motor E, because
The adjusting of locomotive speed may be implemented by the adjusting to electric moter voltage for this.
The impedance summation Σ R of motor driving loop is generally between 0.01~0.1 Ω, armature electric current IaThen specifically may be used
It is calculated as follows:
Wherein Ud is motor terminal voltage, i.e. the output DC voltage of converter plant 2.
Motor torque expression formula are as follows:
Fk=3.6NUdIaηcηd/v×10-3 (3)
Wherein, N is motor number of units, UdFor motor terminal voltage, IaFor armature electric current, ηcFor motor gear transmission efficiency,
ηdElectric efficiency, v are locomotive speed.
By above-mentioned formula (1)~(3), it is known that, can if electric moter voltage is excessive when locomotive starting (when speed is very low)
Cause armature electric current IaIt is excessive, it is excessive so as to cause tractive force, it eventually results in locomotive wheel idle running, alter before locomotive or vehicle
Vehicle consequence is altered in wheel scratch etc..
Which passes through according to voltage-target and the voltage value of the collected direct current generator feedback of voltage sensor
PID control adjusts the voltage of direct current generator, realizes to electric moter voltage closed-loop control；After voltage close loop control, passed according to electric current
The collected current of electric value of feedback of sensor limits current of electric；Complex synchronous transformer after current limit link simultaneously
Synchronization signal carry out pulse distribution, generate required pulse train and thyristor triggered, thus reach control motor electricity
The purpose of pressure realizes locomotive speed continuously adjustable output, while can be avoided and alter the generation such as vehicle, guarantees to adjust safe and reliable
Property.
It is voltage, when the second aim parameter is electric current that the present embodiment, which is based on first object amount, specific steps are as follows:
1. controller level is converted into electric moter voltage target value, i.e., the corresponding electric moter voltage value of existing locomotive level, such as
The corresponding maximum controller level of maximum motor voltage 990V；It certainly, can also be with by increasing the general stepless handle of AC-DC locomotive
Realize stepless voltage regulation/speed regulation；
2. comparing electric moter voltage target value and electric moter voltage actual feedback carrying out PID adjusting, make to feed back by PID adjusting
Value infinitely approaches target value；
3. in summary formula (3) and the collected current of electric value of feedback of current sensor carry out current of electric
Limitation；
4. combination current limitation and synchronization signal are converted into phase shift level, generation meets phase shift level demand pulse train
Each thyristor in the corresponding thyristor adjusting unit of each direct current generator is sent respectively to be triggered.
The second way: in conjunction with the mode of closed-loop current control and voltage limiting element
In which, by direct current generator electric current as first object amount, direct current generator voltage as the second aim parameter
When, as shown in fig. 6, the specific steps of step 2) are as follows:
2.1) current value that acquisition direct current generator is fed back in real time, the current target value being converted to is instructed according to traction control
And the current value of direct current generator feedback, the electric current of direct current generator is adjusted by PID；
2.2) voltage value that acquisition direct current generator is fed back in real time, according to the voltage value of collected direct current generator feedback to straight
The voltage of galvanic electricity machine carries out limitation processing, voltage after output limitation process；Pulse needed for voltage generates after being handled according to limitation
Sequence, which is sent to, triggers thyristor adjusting unit, to control to adjust locomotive speed, returns to step 2.1), until moving back
It controls out.
Which uses current of electric closed-loop control, i.e. controller level corresponds to current of electric, naturally special when entering motor
Property after voltage adjust to maximum, while pressure limiting is carried out according to motor characteristic, to prevent electric moter voltage over-voltage, guarantees to adjust control
Security performance, specific steps are as follows:
1. according to the relationship and locomotive controller of formula (1), (2), (3) obtained current of electric and locomotive speed
The practical corresponding target velocity of instruction, obtains the locomotive characteristic formula of controller instruction and current of electric, locomotive speed relationship；
2. controller instruction is converted into motor current target value, is passed according to electric current according to obtained locomotive characteristic formula
The collected current of electric value of feedback of sensor carries out PID adjusting；
3. current control PID output carries out pulse distribution after overvoltage limiting element, corresponding pulse train control is exported
The exploitation angle by thyristor is made, to realize locomotive speed control.
It further include brake control method, specific steps include: will be described in the disconnection of above-mentioned speed control unit in the present embodiment
The traction secondary side winding of transformer 1, the excitation secondary side winding for accessing transformer 1 and disconnection Direct current treatment module 23, are transferred to
Execute damped condition；The signal of acquisition direct current generator feedback in real time controls alternating current adjustment module 21 according to the signal of feedback
Input side voltage, to control exciting current.
When speed control unit uses structure as shown in Figure 3, switch S4.2 is specifically disconnected under damped condition, it is brilliant by control
Brake tube adjusts unit and adjusts S4.12 input side alternating voltage as exciting bridge, to control exciting current, by current of electric or
Voltage carries out closed-loop control to control brake force, realizes locomotive speed control.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Although of the invention
It has been disclosed in a preferred embodiment above, however, it is not intended to limit the invention.Therefore, all without departing from technical solution of the present invention
Content, technical spirit any simple modifications, equivalents, and modifications made to the above embodiment, should all fall according to the present invention
In the range of technical solution of the present invention protection.
Claims (10)
1. a kind of continuous current locomotive speed control unit based on flexible AC pressure regulation, it is characterised in that including transformer (1)
And the converter plant (2) for converting output adjustable dc voltage, the primary side of the transformer (1) connect Traction networks, secondary side
Direct current generator is connected by the converter plant (2), the converter plant (2) includes sequentially connected alternating current adjustment module
(21), rectification module (22) and Direct current treatment module (23), the alternating current adjustment module (21) are connect based on flexible control
The alternating current for entering the transformer (1) output is adjusted, and converts through the rectification module (22), Direct current treatment module (23)
After required direct current, it is supplied to direct current generator；
The secondary side winding of the transformer (1) includes traction secondary side winding and excitation secondary side winding, by disconnecting the transformation
The traction secondary side winding of device (1), the excitation secondary side winding for accessing the transformer (1), control are transferred to damped condition.
2. the continuous current locomotive speed control unit according to claim 1 based on flexible AC pressure regulation, feature exist
In: the alternating current adjustment module (21) includes that thyristor interconnected adjusts unit and control unit, and the control is single
Member controls the open angle that the thyristor adjusts thyristor in unit, to adjust the continuously adjustable friendship of output based on flexible control
Galvanic electricity.
3. the continuous current locomotive speed control unit according to claim 2 based on flexible AC pressure regulation, feature exist
In: it includes the thyristor of two reverse parallel connections or the thyristor cell of two groups of reverse parallel connections that the thyristor, which adjusts unit,.
4. the continuous current locomotive speed control unit according to claim 3 based on flexible AC pressure regulation, feature exist
In: the alternating current adjustment module (21) further includes that motor side is arranged in detect list for detecting the sensor of motor feedback signals
Member and the synchronization signal transformer that input terminal is set, the sensor detection unit, synchronization signal transformer difference
It is connect with described control unit.
5. the continuous current locomotive speed control unit according to claim 4 based on flexible AC pressure regulation, feature exist
In: the rectification module (22) is full wave bridge rectifier circuit；The rectification module (22) is specially full-wave rectification bridge electricity in locomotive
Road.
6. the continuous current locomotive speed control unit according to claim 1 based on flexible AC pressure regulation, feature exist
In: further include brak control unit interconnected and when for detecting damped condition exciting current exciting current sensing
Device, the exciting current of signal, exciting current sensor detection that the brak control unit is fed back according to direct current generator, control
Make the output voltage of the alternating current adjustment module (21).
7. special using the control method of continuous current locomotive speed control unit described in any one of claim 1~6
Sign is that this method includes traction control method, and specific steps include:
1) start the speed control unit and obtain traction control instruction, the speed control unit exports direct voltage drive
Direct current generator；
2) when being controlled to adjust to locomotive speed, the signal of direct current generator feedback is acquired in real time, is referred to according to the traction control
The signal of order and direct current generator feedback passes through and controls the first object that the alternating current adjustment module (21) adjusts direct current generator
Amount, and the second aim parameter of direct current generator is limited.
8. control method according to claim 7, which is characterized in that the alternating current adjustment module (21) includes mutually interconnecting
The thyristor that connects adjusts unit and control unit, and by direct current generator voltage as first object amount, direct current generator
When electric current is as the second aim parameter, the specific steps of the step 2) are as follows:
2.1) voltage value that acquisition direct current generator is fed back in real time, the voltage-target being converted to is instructed according to the traction control
And the voltage value of the direct current generator feedback, the voltage of direct current generator is adjusted by PID control；
2.2) current value that acquisition direct current generator is fed back in real time, according to the current value of collected direct current generator feedback to direct current
The electric current of machine carries out limitation processing, electric current after output limitation process；Acquisition is set in alternating current adjustment module (21) input terminal
The synchronization signal that the synchrotrans set are exported, electric current after being handled according to the synchronization signal of acquisition and the limitation,
Pulse train needed for generating, which is sent to, triggers thyristor adjusting unit, to control to adjust locomotive speed, returns
Step 2.1) is executed, until exiting control.
9. control method according to claim 7, which is characterized in that the alternating current adjustment module (21) includes mutually interconnecting
The thyristor that connects adjusts unit and control unit, and by direct current generator electric current as first object amount, direct current generator
When voltage is as the second aim parameter, the specific steps of the step 2) are as follows:
2.1) current value that acquisition direct current generator is fed back in real time, the current target value being converted to is instructed according to the traction control
And the current value of the direct current generator feedback, the electric current of the direct current generator is adjusted by PID；
2.2) voltage value that acquisition direct current generator is fed back in real time, according to the voltage value of collected direct current generator feedback to direct current
The voltage of machine carries out limitation processing, voltage after output limitation process；Pulse needed for being generated according to voltage after limitation processing
Sequence, which is sent to, triggers thyristor adjusting unit, after the thyristor adjusts unit adjusting, to control to adjust machine
2.1) vehicle speed returns to step, until exiting control.
10. according to control method described in claim 7 or 8 or 9, which is characterized in that it further include brake control method, it is specific to walk
It suddenly include: traction secondary side winding, the access transformer (1) that the speed control unit is disconnected to the transformer (1)
Excitation secondary side winding and the disconnection Direct current treatment module (23), are transferred to execution damped condition；Acquisition direct current generator in real time
The signal of feedback controls the input side voltage of the alternating current adjustment module (21) according to the signal of feedback, to control excitation electricity
Stream.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610870812.0A CN106385210B (en) | 2016-09-30 | 2016-09-30 | Continuous current locomotive speed control unit and method based on flexible AC pressure regulation |
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| CN201610870812.0A CN106385210B (en) | 2016-09-30 | 2016-09-30 | Continuous current locomotive speed control unit and method based on flexible AC pressure regulation |
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| CN106385210B true CN106385210B (en) | 2018-12-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2666363C1 (en) * | 2017-06-07 | 2018-09-07 | Открытое Акционерное Общество "Российские Железные Дороги" | Traction converter of electric voltage of alternate current for the modes of traction and recovery brake |
| CN108082004A (en) * | 2017-12-19 | 2018-05-29 | 中国铁路总公司 | For the traction control method and system of railway transportation equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202712938U (en) * | 2012-05-16 | 2013-01-30 | 中山普润斯电源设备技术有限公司 | High frequency chopping boost charging circuit |
| JP2014212621A (en) * | 2013-04-18 | 2014-11-13 | 株式会社東芝 | Electric locomotive controller |
| CN104882912A (en) * | 2014-02-28 | 2015-09-02 | 通用电气公司 | DC power transmission systems and method of assembling the same |
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2016
- 2016-09-30 CN CN201610870812.0A patent/CN106385210B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202712938U (en) * | 2012-05-16 | 2013-01-30 | 中山普润斯电源设备技术有限公司 | High frequency chopping boost charging circuit |
| JP2014212621A (en) * | 2013-04-18 | 2014-11-13 | 株式会社東芝 | Electric locomotive controller |
| CN104882912A (en) * | 2014-02-28 | 2015-09-02 | 通用电气公司 | DC power transmission systems and method of assembling the same |
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