CN107776438B - The anti-loop process of urban track traffic traction power supply and system - Google Patents
The anti-loop process of urban track traffic traction power supply and system Download PDFInfo
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- CN107776438B CN107776438B CN201710857491.5A CN201710857491A CN107776438B CN 107776438 B CN107776438 B CN 107776438B CN 201710857491 A CN201710857491 A CN 201710857491A CN 107776438 B CN107776438 B CN 107776438B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M7/00—Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
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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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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Abstract
The present invention provides a kind of anti-loop process of urban track traffic traction power supply and system.The method of the present embodiment is applied to urban track traffic tractive power supply system, the system includes multiple traction substations, each traction substation includes that can present device and diode rectification unit, this method comprises: obtaining the exchange side voltage of diode rectification unit and can present the DC side electric current of device；Side voltage is exchanged according to the parameter of diode rectification unit and diode rectification unit, determines the floating voltage of diode rectification unit；According to the floating voltage of goal-selling voltage and diode rectification unit, determination can present the floating voltage of device；According to that can present the DC side electric current of device, can present the equivalent internal resistance of device and can present the floating voltage of device, determination can present the voltage given value of device, generate circulation to prevent to present between device and diode rectification unit.The present invention can be avoided the generation of circulation, and can be improved the stability of system.
Description
Technical field
The present invention relates to rail traffic traction technique field more particularly to a kind of anti-circulation of urban track traffic traction power supply
Method and system.
Background technique
With the continuous expansion of urban track traffic scale, urban rail is sent out in terms of alleviating urban traffic blocking and energy-saving and emission-reduction
Increasingly important role is waved, thus it is guaranteed that the safe and reliable operation of urban track traffic tractive power supply system seems more next
It is more important.
Urban track traffic tractive power supply system generally includes AC network, direct current contact net and multiple traction substations,
Each traction substation includes that can present device and diode rectification unit.Since the straight of device and diode rectification unit can be presented
It flows side to be connected, on same section of bus, can make it possible to present device and diode rectification unit can constitute one for the exchange side of the two
A circuit.
However, easily leading to the energy in each traction substation when existing system is by factors such as AC network fluctuations
The inversion cut-in voltage for presenting device is lower than the floating voltage of diode rectification unit, makes it possible to present device and opens inversion, diode
That can present circulation can will occur for Rectification Power Factor from open-minded between device and diode rectification unit.And the generation of circulation can
Causing system power to distort, the additional loss of the system can increased, and then seriously affect the overall performance of the system.
Summary of the invention
The present invention provides a kind of anti-loop process of urban track traffic traction power supply and system, to solve existing city rail
Traffic traction power supply system increases system additional energy due to leading to the problem of for circulation and reduces system performance.
The present invention provides a kind of anti-loop process of urban track traffic traction power supply, is applied to urban track traffic traction and supplies
Electric system, the urban track traffic tractive power supply system include multiple traction substations, and each traction substation includes that can present
Device and diode rectification unit, which comprises
Obtain the exchange side voltage and the DC side electric current that device can be presented of the diode rectification unit；
Exchange side voltage according to the parameter of the diode rectification unit and the diode rectification unit, determine described in
The floating voltage of diode rectification unit；
According to the floating voltage of goal-selling voltage and the diode rectification unit, the zero load that can present device is determined
Voltage；
According to the DC side electric current that can present device, the equivalent internal resistance that device can be presented and the sky that device can be presented
Carry voltage, determine the voltage given value that can present device, with prevent it is described can present device and the diode rectification unit it
Between generate circulation.
Optionally, the parameter of the diode rectification unit include: the diode rectification unit transformer voltage ratio and
The transformer ratio of the diode rectification unit.
Optionally, the parameter according to the diode rectification unit and the diode rectification unit exchange side electricity
Pressure, determines the floating voltage of the diode rectification unit, comprising:
The floating voltage of diode rectification unit is obtained by following formula (1):
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of the diode rectification unit, UabcFor the exchange side of the diode rectification unit
Voltage, k1For the transformer voltage ratio of the diode rectification unit, k2For the transformer ratio of the diode rectification unit.
Optionally, the floating voltage according to goal-selling voltage and the diode rectification unit, determines the energy
Present the floating voltage of device, comprising:
The floating voltage that can present device is obtained by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of the diode rectification unit, Δ U
For the goal-selling voltage.
Optionally, described according to the DC side electric current that can present device, the equivalent internal resistance that device can be presented and described
The floating voltage that device can be presented determines the voltage given value that can present device, comprising:
The voltage given value that can present device is obtained by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor institute
State the equivalent internal resistance that can present device, IdcFor the DC side electric current that can present device.
The present invention also provides a kind of urban track traffic tractive power supply system, the system comprises multiple traction substations,
Each traction substation includes that can present device and diode rectification unit, and the device that can present includes: sensor and processor；
The sensor is used to obtain the exchange side voltage and the direct current that can present device of the diode rectification unit
Side electric current；
The processor is used for according to the parameter of the diode rectification unit and exchanging for the diode rectification unit
Side voltage determines the floating voltage of the diode rectification unit；
The processor is also used to determine institute according to the floating voltage of goal-selling voltage and the diode rectification unit
State the floating voltage that can present device；
The processor be also used to according to the DC side electric current that can present device, the equivalent internal resistance that device can be presented and
The floating voltage that device can be presented determines the voltage given value that can present device, with prevent it is described can present device with it is described
Circulation is generated between diode rectification unit.
Optionally, the parameter of the diode rectification unit include: the diode rectification unit transformer voltage ratio and
The transformer ratio of the diode rectification unit.
Optionally, the processor is specifically used for obtaining the floating voltage of diode rectification unit by following formula (1):
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of the diode rectification unit, UabcFor the exchange side of the diode rectification unit
Voltage, k1For the transformer voltage ratio of the diode rectification unit, k2For the transformer ratio of the diode rectification unit.
Optionally, the processor is specifically used for obtaining the floating voltage that can present device by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of the diode rectification unit, Δ U
For the goal-selling voltage.
Optionally, the processor is specifically used for obtaining the voltage given value that can present device by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor institute
State the equivalent internal resistance that can present device, IdcFor the DC side electric current that can present device.
The anti-loop process of urban track traffic traction power supply provided by the invention and system, this method pass through according to diode
The parameter of Rectification Power Factor exchanges side voltage with diode rectification unit, to determine the floating voltage of diode rectification unit.It connects
According to the floating voltage of goal-selling voltage and diode rectification unit, determination can present the size of the floating voltage of device.So
Afterwards, according to that can present the DC side electric current of device, can present the equivalent internal resistance of device and can present the floating voltage of device, determination can present dress
The voltage given value set makes it possible to present the high goal-selling electricity of floating voltage of the no-load voltage ratio diode rectification unit of device
Pressure, can prevent from presenting between device and diode rectification unit generating circulation.The present invention solves existing city rail and hands over
Logical tractive power supply system is caused system capability loss due to leading to the problem of for circulation, stablizes difference, and device can be presented by realizing
Floating voltage is higher than the floating voltage of diode rectification unit always, be automatically prevented from can present device and diode rectification unit it
Between circulation generation, and realize process it is simply easy, it is time saving and energy saving, also improve the stability of system.
Detailed description of the invention
Fig. 1 is the schematic diagram of a scenario of the anti-loop process of urban track traffic traction power supply provided by the invention；
Fig. 2 is the external characteristic curve figure that device and diode rectification unit can be presented in the present invention；
Fig. 3 is the flow chart of the anti-loop process of urban track traffic traction power supply provided by the invention；
Fig. 4 is the structural schematic diagram that can be presented device in the present invention and use current decoupled control；
Fig. 5 is the structural schematic diagram of urban track traffic tractive power supply system provided by the invention.
Specific embodiment
Fig. 1 is the schematic diagram of a scenario of the anti-loop process of urban track traffic traction power supply provided by the invention, and Fig. 2 is this hair
The bright middle external characteristic curve figure that can present device and diode rectification unit.In general, urban track traffic tractive power supply system includes
AC network, direct current contact net and multiple traction substations, each traction substation include diode rectification unit and can present
Device.As shown in Figure 1, for ease of description, the present embodiment is described in detail by taking a traction substation as an example.
Under normal circumstances, when train traction, in urban track traffic tractive power supply system in each traction substation
The work of diode rectification unit, and alternating current is depressured to and is converted into direct current, device can be presented and do not worked, therefore only as in Fig. 2
The outer indicatrix of the diode rectification unit of commutating zone 2., wherein UdoFor the floating voltage of diode rectification unit；UlimFor energy
Device inverter voltage limits value is presented, 1750V is defaulted as；A is limited function point, and AX is limited function curve, rises along the direction AX voltage, and function
Rate remains unchanged, and default limit work value is 2MW；UovFor DC voltage protection value, default value 2100V.When train braking, each lead
Device work can be presented by drawing in electric substation, and is alternating current by the DC conversion that contact net braking generates and is sent to alternating current
Net, diode rectification unit do not work, thus only as Tu2Zhong inversion area the external characteristic curve that can present device 1., wherein U1kFor
The inversion cut-in voltage of device can be presented.Herein it should be noted that for convenience of explanation, device and diode will be presented in Fig. 2
The external characteristic curve of Rectification Power Factor is drawn in the left and right sides of ordinate respectively, convenient for distinguishing different working conditions.In Fig. 2, indulges and sit
Mark UdcFor the DC voltage that can present device, abscissa IdcFor the DC side electric current that can present device.In this way, each traction power transformation
In diode rectification unit and can present device can co-ordination, specific control target can be reached.
In general, can present device has fixed inversion cut-in voltage in existing urban track traffic tractive power supply system, by
In the influence of the factors such as extraneous factor ac grid voltage fluctuation, the inversion cut-in voltage for making it possible to present device can be lower than diode
The floating voltage of Rectification Power Factor can present device and open inversion, and diode rectification unit is in rectification state, can present device at this time
Circulation will be generated between diode rectification unit.Therefore, in order to avoid the generation of circulation, control can be passed through in the present embodiment
The size that the voltage given value of device can be presented, the floating voltage (inversion cut-in voltage) for making it possible to present device are consistently greater than diode
The floating voltage of Rectification Power Factor, to prevent the generation of circulation, it is ensured that whole system can be stablized, reliably operate normally.
Fig. 3 is the flow chart of the anti-loop process of urban track traffic traction power supply provided by the invention, and Fig. 4 is in the present invention
The structural schematic diagram that device uses current decoupled control can be presented.The executing subject of the present embodiment can be city rail shown in FIG. 1
Road traffic traction power supply system, as shown in figure 3, the anti-loop process of urban track traffic traction power supply of the present embodiment can wrap
It includes:
S101, the exchange side voltage for obtaining diode rectification unit and the DC side electric current that device can be presented.
Specifically, in the present embodiment the exchange side voltage of diode rectification unit and can present device DC side electric current and hand over
Stream side power grid, the voltage swing of direct current contact net and actual needs are closely related, and therefore, in the present embodiment can present device can root
It is obtained according to the empirical value in practical application, the present embodiment does not limit this.
S102, side voltage is exchanged according to the parameter of diode rectification unit and diode rectification unit, determines diode
The floating voltage of Rectification Power Factor.
Specifically, in order to enable the floating voltage that can present device is greater than the floating voltage of diode rectification unit, this implementation
The floating voltage that device needs first to obtain diode rectification unit can be presented in example.Various ways can be used in the present embodiment according to two
The different type of pole pipe Rectification Power Factor determines that its floating voltage, the present embodiment do not limit this.
Further, the present embodiment specifically can obtain diode with side voltage is exchanged by the parameter of diode rectification unit
The floating voltage of Rectification Power Factor.Optionally, the parameter of diode rectification unit includes: the transformer voltage ratio of diode rectification unit
With the transformer ratio of diode rectification unit.Wherein, the transformer voltage ratio of diode rectification unit and transformer ratio are diode
The intrinsic parameter of Rectification Power Factor, the value of the two are given value.The present embodiment can be presented can be according to diode rectification unit in device
Actual type carry out both selections, the present embodiment do not limit this.
Specifically, the present embodiment can present device can indicate the floating voltage of diode rectification unit by following formula (1):
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of diode rectification unit, UabcFor the exchange side voltage of diode rectification unit, k1
For the transformer voltage ratio of diode rectification unit, k2For the transformer ratio of diode rectification unit.
Further, in this embodiment the exchange side voltage of diode rectification unit, transformer voltage ratio and transformer ratio are equal
It can measure, given value can be seen as, therefore, the present embodiment can present device and can solve to obtain diode by formula (1)
The floating voltage of Rectification Power Factor.
Further, in this embodiment since the core that can present device is pulse width adjustment (Pulse Width
Modulation, PWM) rectifier, it will usually the current decoupled control based on synchronous rotating frame is used, using outer voltage
With the double-closed-loop control structure and space vector modulation of current inner loop (Space Vector Pulse Width Modulation,
SVPWM) algorithm, as shown in figure 4, wherein outer ring is Voltage loop, inner ring is electric current loop.Wherein, UrefFor can present the voltage of device to
Definite value (Voltage loop given value), and the voltage given value U of device can be presentedrefWith floating voltage U1kBetween there are linear relationship, and drive
Moving pulse is controllable, which to present the circuit determination in device, can present the floating voltage U of device1kSize.
Further, in existing urban track traffic tractive power supply system, UrefFor definite value, and driving pulse can
Controlling the floating voltage that can present device generated also is just definite value, and therefore, existing system is easy to produce circulation.In order to avoid ring
The generation of stream, it is required that the floating voltage that can present device is greater than the floating voltage of diode rectification unit, energy in the present embodiment
Feedback device can be adjusted the size of its voltage given value by the detailed process of S103, realize the floating voltage that can present device
Greater than the floating voltage of diode rectification unit.
S103, according to the floating voltage of goal-selling voltage and the diode rectification unit, determination can present the sky of device
Carry voltage.
Specifically, the present embodiment can present device and can indicate that the floating voltage of device can be presented by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of diode rectification unit, Δ U is default mesh
Mark voltage.
Further, generation driving pulse can be controlled since the voltage given value of device can be presented, driving pulse is controllable
The circuit in device can be presented and generate the floating voltage that can present device, size of the voltage given value to its floating voltage of device can be presented
Play the role of conclusive, therefore, the present embodiment can present device can make its floating voltage U by formula (2)1kCompare diode rectification
The floating voltage U of unitdoAmplitude it is big.Wherein, the amplitude size of goal-selling voltage can be set based on experience value, such as
30V, the present embodiment do not limit this.
Further, device can be presented to be turned up by the driving pulse that its voltage given value generates since device can be presented
Floating voltage, therefore, the present embodiment can be performed S104 detailed process realize make it possible to present device floating voltage it is high always
In the floating voltage of diode rectification unit.
S104, according to can present the DC side electric current of device, the equivalent internal resistance of device can be presented and the floating voltage of device can be presented,
Determination can present the voltage given value of device, generate circulation to prevent to present between device and diode rectification unit.
Specifically, the present embodiment can present device and can indicate that the voltage given value of device can be presented by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor device can be presented
Equivalent internal resistance, IdcFor the DC side electric current that can present device.
Further, in formula (3), the equivalent internal resistance R of device can be presenteddpFor the external characteristic curve that can present device in Fig. 2
Slope equivalence value, and RdpWith the DC side electric current I that can present devicedcIt can be obtained by measurement, given value can be regarded as.
Therefore, in the big goal-selling voltage of the floating voltage for the no-load voltage ratio diode rectification unit that can present device, obtained electricity
The amplitude of pressure given value can become larger, and adjust by a series of PI controllers and Uncoupling Control Based obtains modulating wave UdAnd Uq, then with
The synchro angle that phaselocked loop link generates combines, and finally generates driving pulse, so that the driving pulsation generated can be according to formula (3)
Control generates floating voltage U1kThe floating voltage of diode rectification unit can be consistently higher than, additionally it is possible to prevent that device and two poles can be presented
Circulation is generated between pipe Rectification Power Factor.
Device, which can be presented, for existing urban track traffic tractive power supply system, in the present embodiment can pass through control
Its floating voltage is consistently greater than the floating voltage of diode rectification unit, is automatically prevented from the generation of circulation, without human intervention, and
The size that device is capable of its floating voltage of adjust automatically according to the actual situation can be presented, practicability is big, and ensure that system can be just
Normal operation.
The anti-loop process of urban track traffic traction power supply provided in this embodiment, by according to diode rectification unit
Parameter exchanges side voltage with diode rectification unit, to determine the floating voltage of diode rectification unit.Then according to default
The floating voltage of target voltage and diode rectification unit, determination can present the size of the floating voltage of device.Then, according to can present
The DC side electric current of device, the equivalent internal resistance that device can be presented and the floating voltage that device can be presented, determination can present the voltage of device to
Definite value makes it possible to present the high goal-selling voltage of floating voltage of the no-load voltage ratio diode rectification unit of device, can prevent
It can present and generate circulation between device and diode rectification unit.The present embodiment solves existing urban track traffic traction power supply
System is caused system capability loss due to leading to the problem of for circulation, stablizes difference, and the floating voltage beginning that can present device is realized
It is higher than the floating voltage of diode rectification unit eventually, it has been automatically prevented from the production that can present circulation between device and diode rectification unit
It is raw, and realize that process is simply easy, it is time saving and energy saving, also improve the stability of system.
Fig. 5 is the structural schematic diagram of urban track traffic tractive power supply system provided by the invention.As shown in figure 5, this reality
Applying urban track traffic tractive power supply system in example includes multiple traction substations, and each traction substation includes that diode is whole
It flows unit 10 and device 20 can be presented, can present device 20 includes: sensor 21 and processor 22；
The sensor 21 is used to obtain the exchange side voltage of the diode rectification unit and described can present the straight of device
Flow side electric current；
The processor 22 is used for according to the parameter of the diode rectification unit and the friendship of the diode rectification unit
Side voltage is flowed, determines the floating voltage of the diode rectification unit；
The processor 22 is also used to the floating voltage according to goal-selling voltage and the diode rectification unit, determines
The floating voltage that device can be presented；
The processor 22 is also used to according to the DC side electric current that can present device, the equivalent internal resistance that can present device
With the floating voltage that can present device, the voltage given value that can present device is determined, to prevent from described to present device and institute
It states and generates circulation between diode rectification unit.
Optionally, the parameter of the diode rectification unit include: the diode rectification unit transformer voltage ratio and
The transformer ratio of the diode rectification unit.
Optionally, the processor is specifically used for obtaining the floating voltage of diode rectification unit by following formula (1):
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of the diode rectification unit, UabcFor the exchange side of the diode rectification unit
Voltage, k1For the transformer voltage ratio of the diode rectification unit, k2For the transformer ratio of the diode rectification unit.
Optionally, the processor is specifically used for obtaining the floating voltage that can present device by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of the diode rectification unit, Δ U
For the goal-selling voltage.
Optionally, the processor is specifically used for obtaining the voltage given value that can present device by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor institute
State the equivalent internal resistance that can present device, IdcFor the DC side electric current that can present device.
It is real to can be used for executing the above-mentioned each method of the present invention for urban track traffic tractive power supply system provided in this embodiment
The technical solution for applying example is come true by exchanging side voltage according to the parameter of diode rectification unit and diode rectification unit
Determine the floating voltage of diode rectification unit.Then according to the floating voltage of goal-selling voltage and diode rectification unit, really
Surely present the size of the floating voltage of device.Then, according to can present the DC side electric current of device, can present device equivalent internal resistance and
The floating voltage of device can be presented, determination can present the voltage given value of device, and the no-load voltage ratio diode for making it possible to present device is whole
The high goal-selling voltage of floating voltage for flowing unit, can prevent from presenting between device and diode rectification unit generating circulation.
The present embodiment solve existing urban track traffic tractive power supply system caused due to the generation of circulation system capability loss,
The problem for stablizing difference, realize can present device floating voltage it is higher than the floating voltage of diode rectification unit always, it is automatic anti-
Stop the generation that can present circulation between device and diode rectification unit, and has realized that process is simply easy, it is time saving and energy saving, it also improves
The stability of system.
The present invention also provides a kind of readable storage medium storing program for executing, it is stored with computer program in readable storage medium storing program for executing, when city rail
When at least one processor of road traffic traction power supply system executes the computer program, arouse urban track traffic traction power supply
System executes the anti-loop process of urban track traffic traction power supply.
The present invention also provides a kind of program product, which includes computer program, which is stored in
In readable storage medium storing program for executing.At least one processor of urban track traffic tractive power supply system can be read from readable storage medium storing program for executing
The computer program, at least one processor execute the computer program and urban track traffic tractive power supply system are made to implement city
The anti-loop process of city's rail traffic traction power supply.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of anti-loop process of urban track traffic traction power supply, which is characterized in that be applied to urban track traffic traction and supply
Electric system, the urban track traffic tractive power supply system include multiple traction substations, and each traction substation includes that can present
Device and diode rectification unit, which comprises
Obtain the exchange side voltage and the DC side electric current that device can be presented of the diode rectification unit；
Side voltage is exchanged according to the parameter of the diode rectification unit and the diode rectification unit, determines two pole
The floating voltage of pipe Rectification Power Factor；
The floating voltage that can present device is obtained by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of the diode rectification unit, Δ U is pre-
If target voltage；
The voltage given value that can present device is obtained by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor the energy
Present the equivalent internal resistance of device, IdcFor the DC side electric current that can present device, to prevent from described to present device and the diode
Circulation is generated between Rectification Power Factor.
2. the method according to claim 1, wherein the parameter of the diode rectification unit includes: described two
The transformer ratio of the transformer voltage ratio of pole pipe Rectification Power Factor and the diode rectification unit.
3. according to the method described in claim 2, it is characterized in that, the parameter and institute according to the diode rectification unit
The exchange side voltage for stating diode rectification unit, determines the floating voltage of the diode rectification unit, comprising:
The floating voltage of diode rectification unit is obtained by following formula (1):
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of the diode rectification unit, UabcFor the exchange side electricity of the diode rectification unit
Pressure, k1For the transformer voltage ratio of the diode rectification unit, k2For the transformer ratio of the diode rectification unit.
4. a kind of urban track traffic tractive power supply system, which is characterized in that the system comprises multiple traction substations, each
Traction substation includes that can present device and diode rectification unit, and the device that can present includes: sensor and processor；
The sensor is used to obtain the exchange side voltage and the DC side electricity that can present device of the diode rectification unit
Stream；
The processor is used to exchange side electricity according to the parameter of the diode rectification unit and the diode rectification unit
Pressure, determines the floating voltage of the diode rectification unit；
The processor is also used to obtain the floating voltage that can present device by following formula (2):
U1k=Udo+ Δ U formula (2)；
Wherein, U1kFor the floating voltage that can present device, UdoFor the floating voltage of the diode rectification unit, Δ U is pre-
If target voltage；
The processor is also used to obtain the voltage given value that can present device by following formula (3):
Uref=U1k-Rdp·IdcFormula (3)；
Wherein, UrefFor the voltage given value that can present device, U1kFor the floating voltage that can present device, RdpFor the energy
Present the equivalent internal resistance of device, IdcFor the DC side electric current that can present device, to prevent from described to present device and the diode
Circulation is generated between Rectification Power Factor.
5. system according to claim 4, which is characterized in that the parameter of the diode rectification unit includes: described two
The transformer ratio of the transformer voltage ratio of pole pipe Rectification Power Factor and the diode rectification unit.
6. system according to claim 5, which is characterized in that the processor is specifically used for obtaining by following formula (1)
To the floating voltage of diode rectification unit:
Udo=Uabc×k1×k2Formula (1)；
Wherein, UdoFor the floating voltage of the diode rectification unit, UabcFor the exchange side electricity of the diode rectification unit
Pressure, k1For the transformer voltage ratio of the diode rectification unit, k2For the transformer ratio of the diode rectification unit.
Priority Applications (1)
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| CN112356740B (en) * | 2020-11-20 | 2022-06-07 | 西安许继电力电子技术有限公司 | Feedback control method and system based on PWM energy feedback converter |
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