CN105977983A - Carrier wave phase shift method and system - Google Patents
Carrier wave phase shift method and system Download PDFInfo
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- CN105977983A CN105977983A CN201610519832.3A CN201610519832A CN105977983A CN 105977983 A CN105977983 A CN 105977983A CN 201610519832 A CN201610519832 A CN 201610519832A CN 105977983 A CN105977983 A CN 105977983A
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- traction power
- supply device
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention provides a carrier wave phase shift method and system. The carrier wave phase shift method is applied to a carrier wave phase shift system which includes: at least two energy feedback traction power supply apparatuses and a power grid. The at least two energy feedback traction power supply apparatuses are in separate connection to the power grid. When voltage feature points of the power grid are detected through the energy feedback traction power supply apparatuses, the phase values of carrier waves of the regenerative traction power supply apparatuses are adjusted to be corresponding phase preset values. According to the invention, the method and the system do not require a power supply system to add a rigid line for transmitting a synchronous signal, thus lowering cost of the power supply system.
Description
Technical field
The present invention relates to communication technology, particularly relate to a kind of phase-shifting carrier wave method and system.
Background technology
Can feedback type traction power supply device be applied in track traffic tractive power supply system realize train more
The utilization of braking energy.Feedback type traction power supply device can carry out traction power supply by auxiliary power supply system,
Outside AC network can also be carried out current compensation.But, multiple can the formula of presenting lead when system exists
When drawing electric supply installation, the quality of electrical network is made by the current harmonics of multiple energy feedback type traction power supply device superposition
Become impact.
In prior art, by synchronizing signal needed for hard-wire transfer phase shift, real by phase-shifting carrier wave technology
Current harmonics between existing energy feedback type traction power supply device offsets, external to reduce the current harmonics of superposition
The impact of portion's AC network.
Using existing technology, electric power system needs the extra rigid line arranging and being used for synchronous signal transmission,
Electric power system is relatively costly.
Summary of the invention
The present invention provides a kind of phase-shifting carrier wave method and system, it is not necessary to electric power system is additionally arranged for passing
The rigid line of defeated synchronizing signal, reduces the cost of electric power system.
The present invention provides a kind of phase-shifting carrier wave method, in phase-shifting carrier wave system, including:
The voltage characteristic point of detection electrical network；
When described voltage characteristic point being detected, adjust the phase value of the carrier wave of energy feedback type traction power supply device
For the phase preset value that described energy feedback type traction power supply device is corresponding.
In an embodiment of the present invention, described voltage characteristic point is voltage zero-crossing point of power grid.
In the above-mentioned all embodiments of the present invention, also include: can feedback type traction power supply device control system
By detection on-line operation described can the quantity of feedback type traction power supply device, determine and described can the formula of presenting lead
Draw the angle of required phase shift between electric supply installation.
Phase value and the described formula of presenting of the carrier wave according to described energy feedback type traction power supply device draw confession
The error amount of the phase preset value that electric installation is corresponding, adjusts the carrier wave of described energy feedback type traction power supply device
Frequency.
The present invention provides a kind of phase-shifting carrier wave system, including:
At least two energy feedback type traction power supply device and electrical network, described at least two can present formula traction power supply
Device is connected with described electrical network respectively；
Wherein, described at least two energy feedback type traction power supply device detects the voltage spy of described electrical network respectively
Levy a little；
Described energy feedback type traction power supply device, for when described voltage characteristic point being detected, adjusts energy
The phase value of the carrier wave of feedback type traction power supply device is the phase that described energy feedback type traction power supply device is corresponding
Position preset value.
In an embodiment of the present invention, described voltage characteristic point is voltage zero-crossing point of power grid.
In the above embodiment of the present invention, also include:
Can feedback type traction power supply device control system, described can feedback type traction power supply device control system with
Described at least two energy feedback type traction power supply device connects, and described energy feedback type traction power supply device controls system
The quantity of the energy feedback type traction power supply device united by detection on-line operation, determines that described formula of presenting is drawn
The angle of required phase shift between electric supply installation.
Described energy feedback type traction power supply device, is additionally operable to according to described energy feedback type traction power supply device at energy
Order in feedback type traction power supply device group, determines the phase place that described energy feedback type traction power supply device is corresponding
Preset value.
Described energy feedback type traction power supply device, is additionally operable to the carrier wave according to described energy feedback type traction power supply device
Phase value with described can the error amount of phase preset value corresponding to feedback type traction power supply device, adjust described
The frequency of the carrier wave of energy feedback type traction power supply device.
The present invention provides a kind of phase-shifting carrier wave method and system, and phase-shifting carrier wave method is applied to phase-shifting carrier wave
System, phase-shifting carrier wave system includes: at least two energy feedback type traction power supply device and electrical network, at least two
Individual energy feedback type traction power supply device is connected with described electrical network respectively.By can feedback type traction power supply device examine
When surveying the net pressure of electrical network for presetting net pressure, adjust and can the phase value of carrier wave of feedback type traction power supply device be
Corresponding phase preset value.The phase-shifting carrier wave method and system that the present invention provides, it is not necessary to electric power system
The extra rigid line being used for synchronous signal transmission that arranges, thus, reduce the cost of electric power system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of phase-shifting carrier wave system embodiment one of the present invention；
Fig. 2 is that phase-shifting carrier wave system embodiment one of the present invention can feedback type traction power supply device detection line voltage
The schematic diagram of zero crossing mode；
Fig. 3 is the structural representation of phase-shifting carrier wave system embodiment two of the present invention；
Fig. 4 is phase-shifting carrier wave system energy feedback type traction power supply device carrier phase position judgment mode of the present invention
Schematic diagram；
Fig. 5 is the schematic flow sheet of phase-shifting carrier wave embodiment of the method one of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Term " first " in description and claims of this specification and above-mentioned accompanying drawing, " second ",
(if present) such as " the 3rd " " the 4 " is for distinguishing similar object, without being used for retouching
State specific order or precedence.Should be appreciated that the data of so use in the appropriate case can be mutual
Change, in order to embodiments of the invention described herein such as can be with except here illustrating or describing
Order beyond those is implemented.Additionally, term " includes " and " having " and their any change
Shape, it is intended that cover non-exclusive comprising, such as, contain series of steps or the process of unit,
Method, system, product or equipment are not necessarily limited to those steps or the unit clearly listed, but can
Including that the most clearly list or for these processes, method, product or equipment intrinsic other step
Rapid or unit.
Fig. 1 is the structural representation of phase-shifting carrier wave system embodiment one of the present invention.As it is shown in figure 1, this
The phase-shifting carrier wave system that embodiment provides includes: electrical network 1 and at least two energy feedback type traction power supply device
2.Wherein, feedback type traction power supply device 2 kinetic energy of train braking can be changed into alternating current, and connect
Enter electrical network 1, electrical network 1 is carried out reactive-load compensation, to improve the power factor of electrical network 1.U is electrical network
The net pressure of 1, all energy feedback type traction power supply devices 2 in phase-shifting carrier wave system are all connected with electrical network 1.
Owing to all energy feedback type traction power supply devices 2 in phase-shifting carrier wave system are all connected with electrical network 1, therefore
All energy feedback type traction power supply devices 2 can be detected simultaneously by the change of electrical network 1.
Specifically, phase-shifting carrier wave system comprises at least two energy feedback type traction power supply device 2.Specifically
For each energy feedback type traction power supply device 2, feedback type traction power supply device 2 electrical network 1 can be detected
Net pressure, when energy feedback type traction power supply device 2 detects that the net pressure of electrical network 1 reaches voltage characteristic point,
Feedback type traction power supply device 2 respective carrier phase value can be adjusted to phase preset value.Wherein, energy
The phase preset value of feedback type traction power supply device 2 maybe can the formula of presenting can be led by the distribution of phase-shifting carrier wave system
Draw electric supply installation 2 to be calculated according to rule, the phase preset of different energy feedback type traction power supply devices 2
Value can be similar and different.Wherein, voltage characteristic point can be that electrical network 1 peak value, valley or one are fixing
The net pressure of numerical value.
Alternatively, phase-shifting carrier wave system comprises the quantity of at least two energy feedback type traction power supply device 2
When changing, readjust the phase preset value of each energy feedback type traction power supply device 2.
A kind of possible implementation of the present embodiment is, such as, in phase-shifting carrier wave system, each can present formula
The carrier wave of traction power set 2 need the phase angle of phase shift according to:Count respectively
Obtaining, wherein, N is the number of the energy feedback type traction power supply device 2 comprised in phase-shifting carrier wave system；
The voltage characteristic point of phase-shifting carrier wave system is set to the peak value net pressure of electrical network 1.Assume phase-shifting carrier wave system is wrapped
Containing four energy feedback type traction power supply devices 2, it respectively is energy feedback type traction power supply device A, formula can be presented
Traction power set B, energy feedback type traction power supply device C and energy feedback type traction power supply device D, four energy
Feedback formula traction apparatus is all connected with electrical network.According to above-mentioned rule, the carrier wave of energy feedback type traction power supply device A
The phase angle needing phase shift is 0 °, and the carrier wave of energy feedback type traction power supply device B needs the phase angle of phase shift
Being 90 °, the carrier wave of energy feedback type traction power supply device C needs the phase angle of phase shift to be 180 °, can present formula
The carrier wave of traction power set D needs the phase angle of phase shift to be 270 °.
Then four feedback type traction power supply device can all be detected the net pressure on electrical network 1, when four can be presented formula traction
Electric supply installation is detected simultaneously by the net pressure of electrical network 1 and is positioned at net when pressing through zero point, can feedback type traction power supply device
The phase angle of its carrier wave is set to 0 ° by A, and energy feedback type traction power supply device B is by the phase angle of its carrier wave
It is set to 90 °, feedback type traction power supply device C the phase angle of its carrier wave can be set to 180 °, can present
The phase angle of its carrier wave is set to 270 ° by formula traction power set D.Owing to mains frequency instability is led
Cause error and the difference of each energy feedback type traction power supply device control system of net pressure so that each electrical network 1
Net pressure reaches net when pressing through zero point, four can feedback type traction power supply devices carrier wave phase place all can with each
There is error in 0 ° of the phase angle, 90 °, 180 ° and 270 ° that need phase shift, then can present formula traction power supply
Device A, can feedback type traction power supply device B, can feedback type traction power supply device C and formula traction power supply can be presented
Device D the net pressure of electrical network each time reach net press through zero point time, adjust the phase angle of respective carrier wave,
Make each can the phase angle of carrier wave of feedback type traction power supply device relative to voltage zero-crossing point of power grid time protect all the time
Hold constant, and be followed successively by 0 °, 90 °, 180 ° and 270 °
The present embodiment, during by the net pressure of energy feedback type traction power supply device detection electrical network for voltage characteristic point,
The phase value of the carrier wave adjusting energy feedback type traction power supply device is corresponding phase preset value.Net with electrical network
Pressure reaches the synchronization criterion that preset value is phase shift, same from additionally arranging hard-wire transfer without electric power system
Step signal is as the synchronization criterion of phase shift, and then reduces the cost of electric power system, simultaneously because traditional
Hard-wire transfer mode makes the distance of equipment room be restricted, and away from too far away, synchronization can be caused inaccurate, this
The application of embodiment also improves the accuracy that phase-shifting carrier wave controls.
Alternatively, in the above-described embodiments, the zero point net pressure that net pressure is electrical network 1, the electricity of electrical network 1 are preset
Pressure value U=0.
Specifically, when feedback type traction power supply device 2 detecting that the net of electrical network 1 presses through zero point, i.e. electrical network
When the net pressure of 1 reaches zero point net pressure, feedback type traction power supply device 2 carrier phase value can be adjusted to phase place
Preset value.
Fig. 2 is that phase-shifting carrier wave system energy feedback type traction power supply device of the present invention detects voltage zero-crossing point of power grid side
The schematic diagram of formula.As in figure 2 it is shown, a kind of possible implementation of the present invention is that U is the net of electrical network 1
Pressure, E is feedback type traction power supply device 2 to produce in real time and net according to the sinusoidal wave form of the net pressure of electrical network 1
Pressure same phase same frequency square-wave signal, utilize Digital Signal Processing (Digital Signal Processing,
Be called for short DSP) capturing function, rising edge or the trailing edge of square-wave signal can be captured, and produce interruption
Signal is as the synchronization criterion of phase shift.
Alternatively, in the various embodiments described above, each energy feedback type traction power supply device 2 can presented according to it
Order in formula traction power set group, determines the phase preset value of correspondence.
Specifically, at least two energy feedback type traction power supply device 2 comprised in phase-shifting carrier wave system connects simultaneously
Being connected on electrical network 1, each energy feedback type traction power supply device 2 can obtain being positioned at all formulas of presenting and draw confession
Order in the whole energy feedback type traction power supply device group of electric installation composition.
A kind of possible implementation is: be carried out by rigid line between all energy feedback type traction power supply devices 2
Connect, and intercourse state, each feedback type traction power supply device 2 can obtain and every other can the formula of presenting lead
Draw the state of electric supply installation 2, obtain this energy feedback type traction power supply device 2 with this and can present formula traction whole
Order in electric supply installation group, thus determine that this energy feedback type traction power supply device 2 is right according to the order obtained
The phase preset value answered.
Fig. 3 is the structural representation of phase-shifting carrier wave system embodiment two of the present invention.As it is shown on figure 3, this reality
The phase-shifting carrier wave system that executing example provides includes: electrical network 1, at least two energy feedback type traction power supply device 2 and
Energy feedback type traction power supply device control system 3, each formula traction power supply of presenting in phase-shifting carrier wave system fills
Put 2 to be all connected with electrical network 1, can feedback type traction power supply device control system 3 can the formula of presenting lead with at least two
Draw electric supply installation 2 to connect.Wherein, U is the net pressure of electrical network 1.Can feedback type traction power supply device 2 will arrange
The kinetic energy of car braking changes into alternating current, and accesses electrical network 1, electrical network 1 is carried out reactive-load compensation, to carry
The power factor of high electrical network 1.Can feedback type traction power supply device control system 3 be used for according to presenting formula traction
The quantity of electric supply installation 2, determines the angle of required phase shift between energy feedback type traction power supply device 2, the most really
The phase preset value of fixed each energy feedback type traction power supply device 2 correspondence；And phase preset value is sent respectively
To corresponding energy feedback type traction power supply device 2.Owing to all formulas of presenting in phase-shifting carrier wave system are drawn
Electric supply installation 2 is all connected with electrical network 1, and the most all energy feedback type traction power supply devices 2 can detect simultaneously
Change to electrical network 1.
Specifically, phase-shifting carrier wave system comprises at least two energy feedback type traction power supply device 2.Concrete pin
To each energy feedback type traction power supply device 2, energy feedback type traction power supply device 2 detects the net pressure of electrical network 1,
When energy feedback type traction power supply device 2 detects that the net pressure of electrical network 1 reaches voltage characteristic point, can the formula of presenting lead
Draw electric supply installation 2 and respective carrier phase value is adjusted to phase preset value.Wherein, formula traction can be presented supply
Electric installation control system 3 determines the phase preset value of energy feedback type traction power supply device 2, and by phase preset
Value sends to this energy feedback type traction power supply device 2.The phase preset of different energy feedback type traction power supply devices 2
Value can be similar and different.Wherein, voltage characteristic point can be electrical network 1 peak value, valley, zero crossing or
The net pressure of one fixed numbers.
Alternatively, when in phase-shifting carrier wave system, the quantity of energy feedback type traction power supply device 2 changes,
Readjust the phase preset value of each energy feedback type traction power supply device 2.Specifically, formula traction can be presented
The quantity of the energy feedback type traction power supply device 2 in electric supply installation control system 3 detected carrier phase-shift system
Change, then redefine the phase preset value of each energy feedback type traction power supply device 2, and by phase
Position preset value is sent respectively to corresponding energy feedback type traction power supply device 2.
A kind of possible implementation of the present embodiment is, for example, it is assumed that comprise four in phase-shifting carrier wave system
Individual energy feedback type traction power supply device 2, can present formula traction apparatus 2 for four and all be connected with electrical network 1.Formula can be presented
Traction power set control system 3 is according to the number of energy feedback type traction power supply device, successively by four side by side
Energy feedback type traction power supply device 2 named can feedback type traction power supply device A, can present formula traction power supply dress
Put B, can feedback type traction power supply device C and can feedback type traction power supply device D, and be sequentially allocated and can present formula
The carrier wave of traction power set A needs the phase angle of phase shift to be 0 °, energy feedback type traction power supply device B
Carrier wave needs the phase angle of phase shift to be 90 °, and the carrier wave of energy feedback type traction power supply device C needs the phase of phase shift
Parallactic angle is 180 °, and the carrier wave of energy feedback type traction power supply device D needs the phase angle of phase shift to be 270 °.
Then four feedback type traction power supply device can all be detected the net pressure on electrical network 1, when four can be presented formula traction
Electric supply installation is detected simultaneously by the net pressure of electrical network 1 when press for zero point net, energy feedback type traction power supply device A general
The phase angle of its carrier wave is set to 0 °, can feedback type traction power supply device B be arranged at the phase angle of its carrier wave
It is 90 °, feedback type traction power supply device C the phase angle of its carrier wave can be set to 180 °, can the formula of presenting lead
Draw electric supply installation D and the phase angle of its carrier wave is set to 270 °.Can feedback type traction power supply device A, energy
Feedback type traction power supply device B, energy feedback type traction power supply device C and energy feedback type traction power supply device D are often
When the net pressure of electrical network 1 reaches peak value net pressure, all according to energy feedback type traction power supply device control system 3
The phase preset value specified, adjusts the phase angle of respective carrier wave so that respectively can feedback type traction power supply device
The phase angle of carrier wave remain constant when pressing relative to electrical network 1 voltage peak net, and be followed successively by 0 °,
90 °, 180 ° and 270 °
The present embodiment, during by the net pressure of energy feedback type traction power supply device detection electrical network for voltage characteristic point,
The phase value of the carrier wave adjusting energy feedback type traction power supply device is corresponding phase preset value, and wherein phase place is pre-
If value is by can feedback type traction power supply device control system determine.The phase-shifting carrier wave system of the present embodiment is with electrical network
Net pressure to reach voltage characteristic point be the synchronization criterion of phase-shifting carrier wave, additionally set from without electric power system
Put the hard-wire transfer synchronizing signal synchronization criterion as phase shift, and then reduce the cost of electric power system, with
Time make the distance of equipment room be restricted due to traditional hard-wire transfer mode, away from too far away, can cause with
Walking inaccurate, the application of the present embodiment also improves the accuracy that phase-shifting carrier wave controls.
In the above-described embodiments, further, for each energy feedback type traction power supply device 2, can present
Formula traction power set 2 is drawn supplied by phase value and the formula of presenting of the carrier wave of energy feedback type traction power supply device
The error amount of the phase preset value of electric installation 2 correspondence, adjusts the frequency of carrier wave, thus can present formula traction
The phase value of the carrier wave of electric supply installation 2 is adjusted to corresponding phase preset value.
A kind of possible implementation is: feedback type traction power supply device 2 the net pressure of electrical network 1 can detected
When reaching to preset net pressure, adjust the frequency of carrier wave, by the phase place of the carrier wave of energy feedback type traction power supply device 2
Value is adjusted to corresponding phase preset value.Owing to the frequency instability of electrical network causes the error of net pressure and each energy
The error of feedback type traction power supply device 2 carrier frequency, when the net pressure of each electrical network reaches voltage characteristic point,
The phase place of the carrier wave of energy feedback type traction power supply device 2 all can change.
Such as: Fig. 4 is can feedback type traction power supply device carrier phase position in phase-shifting carrier wave system of the present invention
The schematic diagram of judgment mode.As shown in Figure 4, as a example by triangular carrier, shown in figure can the formula of presenting lead
The preset phase value drawing electric supply installation 2 carrier wave is 0 °, i.e. carrier wave shown in 401 in figure, can present formula
Traction power set 2 detects that the net pressure of electrical network 1 reaches the moment T of voltage characteristic point, and this can the formula of presenting lead
The phase angle drawing electric supply installation 2 carrier wave is positioned at preset phase value 0 °.Owing to the frequency of electrical network 1 is unstable
Surely causing error and the error of each energy feedback type traction power supply device carrier frequency of net pressure, this can present formula traction
There is certain error in the phase place of the carrier wave of electric supply installation 2 and phase preset value 0 °.As shown in figure 402
Carrier wave, feedback type traction power supply device can detect that net pressure reaches the moment T of voltage characteristic point, this energy
The phase place of feedback type traction power supply device 2 carrier wave does not arrives 0 °, and delayed phase, i.e. carrier frequency are inclined
Little, carrier frequency should be increased；Carrier wave as shown in figure 403, can feedback type traction power supply device 2 examine
Measuring net pressure and reach the moment T of voltage characteristic point, the phase place of this energy feedback type traction power supply device 2 carrier wave surpasses
Having crossed 0 °, phase place is advanced, i.e. carrier frequency is bigger than normal, should reduce carrier frequency.Last it is noted that
Can feedback type traction power supply device carrier phase position judgement side in phase-shifting carrier wave system of the present invention shown in Fig. 4
The schematic diagram of formula, the error of carrier wave is all shown in a carrier cycle, but is not limited to this, works as carrier wave
Error more than a carrier cycle time, still can detect that phase place is advanced or stagnant by modes such as carrier wave countings
After degree.
A kind of possible implementation is, such as, feedback type traction power supply device 2 can include DSP count module
Block, for counting the carrier wave of energy feedback type traction power supply device 2.Can feedback type traction power supply device inspection
2 survey electrical network 1 voltage characteristic points are zero point net pressure.The frequency assuming carrier wave is 1kHz, the net pressure of electrical network 1
Frequency be 50Hz.If feedback type traction power supply device 2 can detect that the moment carrier wave phase for zero point pressed by net
After steric retardation, then explanation carrier frequency is less than normal, needs to increase the frequency of carrier wave, and according to DSP counting module
Count value error x, reduce the cycle of carrier wave, due to the net pressure of the frequency according to carrier wave and electrical network 1
Frequency is detected that net pressure is to have 20 triangular carriers between zero point net pressure every time, therefore by required regulation
Count value error average mark be adjusted to each carrier wave, i.e. the DSP count value cycle of carrier wave reduces
x/20.If feedback type traction power supply device can detect that the moment carrier phase that net pressure is zero point is advanced, then
Illustrate that carrier frequency is bigger than normal, need to reduce the frequency of carrier wave, and miss according to the count value of DSP counting module
Difference x, increases the cycle of carrier wave, owing to the frequency of the net pressure of the frequency according to carrier wave and electrical network obtains every time
Detect that net pressure is to have 20 triangular carriers between zero point net pressure, therefore by the count value error of required regulation
Average mark to each carrier wave is adjusted, i.e. the DSP count value cycle of carrier wave increases x/20.
The present embodiment, during by the net pressure of energy feedback type traction power supply device detection electrical network for voltage characteristic point,
The phase value of the carrier wave adjusting energy feedback type traction power supply device is corresponding phase preset value, wherein, passes through
The frequency adjusting carrier wave realizes the adjustment of phase place.The phase-shifting carrier wave system of the present embodiment reaches with the net pressure of electrical network
It is the synchronization criterion of phase-shifting carrier wave to voltage characteristic point, passes from additionally arranging rigid line without electric power system
Defeated synchronizing signal is as the synchronization criterion of phase shift；And avoid forcing to set carrier wave in the moment of locking phase
The carrier phase sudden change that brings of phase place, thus ensure that the normal modulation of carrier wave is unaffected, simultaneously by
Make the distance of equipment room be restricted in traditional hard-wire transfer mode, away from too far away, synchronization can be caused not
Accurately, the application of the present embodiment also improves the accuracy that phase-shifting carrier wave controls.
Fig. 5 is the schematic flow sheet of phase-shifting carrier wave embodiment of the method one of the present invention.As it is shown in figure 5, this reality
Execute example phase-shifting carrier wave method to comprise the following steps:
S501: the voltage characteristic point of detection electrical network.
Wherein, voltage characteristic point can be the net pressure of electrical network peak value, valley or a fixed numbers.
S502: when voltage characteristic point being detected, adjusts the phase place of the carrier wave of energy feedback type traction power supply device
Value is the phase preset value that energy feedback type traction power supply device is corresponding.
Wherein, feedback type traction power supply device the kinetic energy of train braking can be changed into alternating current, and access
Electrical network, carries out reactive-load compensation to electrical network, to improve the power factor of electrical network.In phase-shifting carrier wave system
All energy feedback type traction power supply devices are all connected with electrical network.Due to all energy feedbacks in phase-shifting carrier wave system
Formula traction power set is all connected with electrical network, and the most all energy feedback type traction power supply devices can be examined simultaneously
Measure the change of electrical network.
Specifically, phase-shifting carrier wave system comprises at least two energy feedback type traction power supply device.It is specific to
Each energy feedback type traction power supply device, the net pressure of energy feedback type traction power supply device detection electrical network, when presenting
Formula traction power set detects when the net pressure of electrical network reaches voltage characteristic point, can feedback type traction power supply device
Respective carrier phase value is adjusted to phase preset value.Wherein, the phase place of energy feedback type traction power supply device
Preset value can be distributed by phase-shifting carrier wave system or can feedback type traction power supply device calculate according to rule
Arriving, the phase preset value of different energy feedback type traction power supply devices can be similar and different.
The present embodiment, during by the net pressure of energy feedback type traction power supply device detection electrical network for voltage characteristic point,
The phase value of the carrier wave adjusting energy feedback type traction power supply device is corresponding phase preset value.Net with electrical network
It is the synchronization criterion of phase shift that pressure reaches voltage characteristic point, passes from additionally arranging rigid line without electric power system
Defeated synchronizing signal is as the synchronization criterion of phase shift, and then reduces the cost of electric power system, simultaneously because pass
The hard-wire transfer mode of system makes the distance of equipment room be restricted, and away from too far away, synchronization can be caused inaccurate,
The application of the present embodiment also improves the accuracy that phase-shifting carrier wave controls.
Alternatively, the quantity comprising at least two energy feedback type traction power supply device in phase-shifting carrier wave system is sent out
During changing, readjust the phase preset value of each energy feedback type traction power supply device.
Further, in the above-described embodiments, the zero point net pressure that net pressure is electrical network, the i.e. net of electrical network are preset
Pressure is zero.
Specifically, when feedback type traction power supply device detecting that voltage characteristic point is voltage zero-crossing point of power grid,
When i.e. the net pressure of electrical network reaches zero point net pressure, feedback type traction power supply device carrier phase value can be adjusted to phase
Position preset value.
Alternatively, in the various embodiments described above, according to feedback type traction power supply device presenting formula traction confession
Order in electric installation group, determines the phase preset value that energy feedback type traction power supply device is corresponding.
Specifically, at least two energy feedback type traction power supply device comprised in phase-shifting carrier wave system is simultaneously connected with
On electrical network, each energy feedback type traction power supply device can obtain being positioned at all energy feedback type traction power supply devices
Order in the whole energy feedback type traction power supply device group of composition.
A kind of possible implementation is: be carried out even by rigid line between all energy feedback type traction power supply devices
Connecing, and intercourse state, each energy feedback type traction power supply device obtains every other formula of presenting and draws confession
The state of electric installation, obtains this energy feedback type traction power supply device in whole energy feedback type traction power supply device with this
Order in group, thus determine that phase place corresponding to this energy feedback type traction power supply device is pre-according to the order obtained
If value.
Alternatively, in the various embodiments described above, can feedback type traction power supply device control system be existed by detection
The quantity of the described energy feedback type traction power supply device that line runs, determines institute between energy feedback type traction power supply device
Need the angle of phase shift.
Specifically, can feedback type traction power supply device control system be used for according to energy feedback type traction power supply device
Quantity, determines the phase preset value that each energy feedback type traction power supply device is corresponding；And phase preset value is divided
It is not sent to corresponding energy feedback type traction power supply device.
Alternatively, when in phase-shifting carrier wave system, the quantity of energy feedback type traction power supply device changes, again
Adjust the phase preset value of each energy feedback type traction power supply device.Wherein, can feedback type traction power supply device control
The quantity of the energy feedback type traction power supply device in system detected carrier phase-shift system processed changes, the most again
Determine the phase preset value of each energy feedback type traction power supply device, and phase preset value is sent respectively to institute
Corresponding energy feedback type traction power supply device.
Further, in the above-described embodiments, according to can the phase place of carrier wave of feedback type traction power supply device
Being worth the error amount of the phase preset value corresponding with energy feedback type traction power supply device, adjustment can be presented formula traction and be supplied
The frequency of the carrier wave of electric installation.
A kind of possible implementation is: owing to the frequency instability of electrical network causes the error of net pressure and each energy
The error of feedback type traction power supply device carrier frequency, when the net pressure of each electrical network reaches voltage characteristic point, energy
The phase place of the carrier wave of feedback type traction power supply device all can change.Can feedback type traction power supply device detect
When net pressure to electrical network reaches to preset net pressure, adjust the frequency of carrier wave, by energy feedback type traction power supply device
The phase value of carrier wave is adjusted to corresponding phase preset value.
Such as: Fig. 4 is can feedback type traction power supply device carrier phase position in phase-shifting carrier wave system of the present invention
The schematic diagram of judgment mode.As shown in Figure 4, as a example by triangular carrier, shown in figure can the formula of presenting lead
The preset phase value drawing electric supply installation carrier wave is 0 °, i.e. carrier wave shown in 401 in figure, can the formula of presenting lead
Drawing electric supply installation and detect that the net pressure of electrical network reaches the moment T of voltage characteristic point, this can present formula traction power supply
The phase angle of device carrier wave is positioned at preset phase value 0 °.Owing to the frequency instability of electrical network causes net pressure
Error and each can the error of feedback type traction power supply device carrier frequency, this energy feedback type traction power supply device
There is certain error in the phase place of carrier wave and phase preset value 0 °.Carrier wave as shown in figure 402, at energy
Feedback type traction power supply device detects that net pressure reaches the moment T of voltage characteristic point, and this can present formula traction power supply
The phase place of device carrier wave does not arrives 0 °, and delayed phase, i.e. carrier frequency are less than normal, should increase carrier wave
Frequency；Carrier wave as shown in figure 403, feedback type traction power supply device can detect that net pressure reaches voltage
The moment T of characteristic point, the phase place of this energy feedback type traction power supply device carrier wave has exceeded 0 °, and phase place is advanced,
I.e. carrier frequency is bigger than normal, should reduce carrier frequency.It is last it is noted that the present invention shown in Fig. 4 carries
The schematic diagram of energy feedback type traction power supply device carrier phase position judgment mode in ripple phase-shift system, carrier wave
Error is all shown in a carrier cycle, but is not limited to this, when the error of carrier wave is more than a carrier wave
During the cycle, still can detect, by modes such as carrier wave countings, the degree that phase place is advanced or delayed.
The present embodiment, when netting pressure by the net pressure of energy feedback type traction power supply device detection electrical network for presetting, adjusts
The phase value of the carrier wave of whole energy feedback type traction power supply device is corresponding phase preset value, wherein, by adjusting
The frequency of whole carrier wave realizes the adjustment of phase place.The phase-shifting carrier wave system of the present embodiment reaches with the net pressure of electrical network
Preset value is the synchronization criterion of phase-shifting carrier wave, synchronizes from additionally arranging hard-wire transfer without electric power system
Signal is as the synchronization criterion of phase shift；And avoid setting the phase place of carrier wave in the moment pressure of locking phase
The carrier phase sudden change brought, thus ensure that the normal modulation of carrier wave is unaffected, simultaneously because traditional
Hard-wire transfer mode make the distance of equipment room be restricted, away from too far away, can cause synchronization inaccurate,
The application of the present embodiment also improves the accuracy that phase-shifting carrier wave controls.
One of ordinary skill in the art will appreciate that: realize all or part of step of above-mentioned each method embodiment
Suddenly can be completed by the hardware that programmed instruction is relevant.Aforesaid program can be stored in a computer can
Read in storage medium.This program upon execution, performs to include the step of above-mentioned each method embodiment；And
Aforesaid storage medium includes: ROM, RAM, magnetic disc or CD etc. are various can store program code
Medium.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a phase-shifting carrier wave method, it is characterised in that including:
The voltage characteristic point of detection electrical network；
When described voltage characteristic point being detected, adjust the phase value of the carrier wave of energy feedback type traction power supply device
For the phase preset value that described energy feedback type traction power supply device is corresponding.
Method the most according to claim 1, it is characterised in that described voltage characteristic point is electricity
Net voltage over zero.
Method the most according to claim 1 and 2, it is characterised in that also include:
Can feedback type traction power supply device control system be drawn by the described formula of presenting of detection on-line operation
The quantity of electric supply installation, determines the angle of required phase shift between described energy feedback type traction power supply device.
Method the most according to claim 1 and 2, it is characterised in that also include:
According to described energy feedback type traction power supply device order in energy feedback type traction power supply device group, really
The phase preset value that fixed described energy feedback type traction power supply device is corresponding.
Method the most according to claim 1 and 2, it is characterised in that also include:
Phase value and the described formula of presenting of the carrier wave according to described energy feedback type traction power supply device draw confession
The error amount of the phase preset value that electric installation is corresponding, adjusts the carrier wave of described energy feedback type traction power supply device
Frequency.
6. a phase-shifting carrier wave system, it is characterised in that including:
At least two energy feedback type traction power supply device and electrical network, described at least two can present formula traction power supply
Device is connected with described electrical network respectively；
Wherein, described at least two energy feedback type traction power supply device detects the voltage spy of described electrical network respectively
Levy a little；
Described energy feedback type traction power supply device, for when described line voltage characteristic point being detected, adjusts
The phase value of the carrier wave of whole energy feedback type traction power supply device is that described energy feedback type traction power supply device is corresponding
Phase preset value.
System the most according to claim 6, it is characterised in that described voltage characteristic point is electricity
Net voltage over zero.
8. according to the system described in claim 6 or 7, it is characterised in that also include:
Can feedback type traction power supply device control system, described can feedback type traction power supply device control system with
Described at least two energy feedback type traction power supply device connects, and described energy feedback type traction power supply device controls system
The quantity of the energy feedback type traction power supply device united by detection on-line operation, determines that described formula of presenting is drawn
The angle of required phase shift between electric supply installation.
9. according to the system described in claim 6 or 7, it is characterised in that described formula of presenting is drawn
Electric supply installation, is additionally operable to according to described energy feedback type traction power supply device in energy feedback type traction power supply device group
In order, determine described can phase preset value corresponding to feedback type traction power supply device.
10. according to the system described in claim 6 or 7, it is characterised in that described formula of presenting is drawn
Electric supply installation, be additionally operable to according to described can the phase value of carrier wave of feedback type traction power supply device and described energy
The error amount of the phase preset value that feedback type traction power supply device is corresponding, adjusts and described can present formula traction power supply
The frequency of the carrier wave of device.
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