CN109600051A - The through cophase supply device of non-full capacity and its control method - Google Patents

The through cophase supply device of non-full capacity and its control method Download PDF

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Publication number
CN109600051A
CN109600051A CN201811485025.XA CN201811485025A CN109600051A CN 109600051 A CN109600051 A CN 109600051A CN 201811485025 A CN201811485025 A CN 201811485025A CN 109600051 A CN109600051 A CN 109600051A
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full capacity
transformer
cophase supply
ref
voltage
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CN109600051B (en
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胡钰杰
李子欣
赵聪
王平
李耀华
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

A kind of through cophase supply device of non-full capacity and its control method, You Yitai Scott tractive transformer TtracWith a non-full capacity cophase supply current transformer CPIt constitutes.Non- full capacity cophase supply current transformer CPThe internal electrical isolation that input side and outlet side are carried out by high frequency transformer.Tractive transformer α phase and β phase voltage connect to obtain the voltage u that a size is contact net voltage magnitude 1/k (k is greater than 1)αn1+uβn2, the voltage u of non-full capacity cophase supply current transformer output portinvContact net, current transformer C are connected to above-mentioned Voltage SeriesP(1-1/k) for only needing to export contact net voltage can transmit whole active power needed for train.In different power supply station's voltage uαn1+uβn2In the case where having gap, adjustable uinvRealization is open to traffic formula cophase supply.Meanwhile non-full capacity cophase supply current transformer CPPass through the electric current i of control port aAWith the electric current i of port bBJust the negative phase-sequence and reactive current of three-phase electricity net side can be effectively suppressed.

Description

The through cophase supply device of non-full capacity and its control method
Technical field
The present invention relates to a kind of through cophase supply device and its control method, in particular to a kind of non-full capacity perforation Formula cophase supply device and its control method.
Background technique
In existing electric railway traction power supply system, due to the railway system single phase power supply standard and utility network three Phase standard cannot be matched directly, so that railway power system has to power in different power supply segmentations using split-phase, i.e., it is different Segmentation be powered using a certain phase in three phase network.When the presence of electric split-phase causes locomotive by insulation layer between split-phase Tractive force and speed loss are produced, and leads to occur negative-sequence current in three phase supply net, and negative-sequence current is with locomotive power Increase become increasingly severe.
To solve the above-mentioned problems, there are expert and scholar to propose cophase supply system, that is, cancel in existing power supply system Electric split-phase, the voltage magnitude for obtaining locomotive in the process of running and phase are kept continuously without mutating, existing Cophase supply system schema can be generally divided into active compensation formula and two kinds through.
Although active compensation formula cophase supply has cophase supply ability, due to the output electricity of each traction substation Pressure depends mainly on some output winding of tractive transformer, and the output voltage phase of adjacent traction substation generally cannot be guaranteed Identical, this reduces the power supply quality of homo-phase traction power supply system and reliabilities.So such system is although can take Disappear traction in electric neutral section, but the electric neutral section between traction substation can not be cancelled, phase splitting problem is still In the presence of such as patent CN201210057280.0, described in CN201310487237.2.
Each segmentation voltage-phase of through cophase supply difference traction substation power supply is nearly identical, contact net On without electric neutral section.But the current transformer of existing through cophase supply scheme will undertake whole wattful powers of load Rate, Converter Capacity is big, and cost is high, such as patent CN201520230853.4, described in CN201810124008.7.
Summary of the invention
It is an object of the invention to overcome the problems, such as that active compensation formula still had split-phase in existing cophase supply device, passed through The disadvantage that general formula current transformer withstanding voltage is high, required capacity is big, proposes a kind of through cophase supply current transformer of non-full capacity.
The non-through cophase supply device of full capacity of the present invention is by a Scott tractive transformer TtracWith a non-Quan Rong Measure cophase supply current transformer CPIt constitutes.Scott tractive transformer TtracInput side be connected with three phase network, Scott traction voltage transformation Device TtracOutlet side and non-full capacity cophase supply current transformer CPInput side be connected, non-full capacity cophase supply current transformer Cp Outlet side and Scott tractive transformer Ttracα phase connect and be followed by contact net with β phase output terminal.
Non- full capacity cophase supply current transformer CPInside by high frequency transformer progress input side and outlet side it is electrical every From.Scott tractive transformer TtracThree terminals of input side are a, b, c, and four terminals of outlet side are α, n1, β, n2；It is non-complete Capacity cophase supply current transformer CPInput side ports a terminal be a1、a2, the terminal of input side ports b is b1、b2, outlet side The terminal of port c is c1、c2.It is characterized by: Scott tractive transformer TtracThree terminals a, b, c of input side are respectively with three A, B, C three-phase of phase power grid are connected, Scott tractive transformer TtracOutlet side terminal α and non-full capacity cophase supply current transformer CP Input side ports a terminal a1Connection, Scott tractive transformer TtracThe terminal n of outlet side1With non-full capacity cophase supply Current transformer CPInput side ports a terminal a2Connection, Scott tractive transformer TtracThe terminal β of outlet side and non-full capacity are same Mutually for electric converter CPInput side ports b terminal b1Connection, Scott tractive transformer TtracThe terminal n of outlet side2With it is non- Full capacity cophase supply current transformer CPInput side ports b terminal b2Connection.Scott tractive transformer TtracOutlet side terminal α With β series connection after with non-full capacity cophase supply current transformer CPC series connection in outlet side port is that contact net is powered, i.e. Scott traction becomes Depressor TtracOutlet side terminal α is connected with contact net, Scott tractive transformer TtracOutlet side terminal n1It draws and becomes with Scott Depressor TtracThe terminal β of outlet side is connected, Scott tractive transformer TtracOutlet side terminal n2With non-full capacity cophase supply Current transformer CPThe terminal c of outlet side port c2It is connected, non-full capacity cophase supply current transformer CPThe terminal c of outlet side port c1With Rail is connected.
The control method of the non-through cophase supply device of full capacity of the present invention is as follows:
The non-full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control.Non- Quan Rong Measure cophase supply current transformer CPIt inputs side ports a and port b and uses closed-loop current control.Specific control method is as follows:
The non-full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control, with reference to electricity Press given value uinv_refValue by required contact net voltage ucatenaryWith Scott tractive transformer Ttracα phase and β are connected in series defeated Voltage u outαn1+uβn2Subtract each other to obtain, it may be assumed that
uinv_ref=ucatenary-(uαn1+uβn2)
Wherein, uαn1For Scott transformer Ttracα phase output voltage, i.e. Scott tractive transformer TtracOutlet side terminal α and terminal n1Between voltage, uβn2For Scott transformer Ttracβ phase output voltage, i.e. Scott tractive transformer TtracIt is defeated Outside end sub- β and terminal n2Between voltage, by Scott tractive transformer Ttracα phase export series connection, i.e. terminal with β phase N1 is connected with β, obtains series connection output voltage uαn1+uβn2；uαn1-uβn2For the 1/k of contact net voltage.
Current transformer CPThe voltage of outlet side port c is equal to (the k-1)/k, current transformer C of contact net voltagePOutlet side port c's Electric current is equal to load current, current transformer CPThe power of outlet side port c is bearing power (k-1)/k, i.e. current transformer CPOutlet side Capacity be load capacity (k-1)/k, k is the integer greater than 1.
The non-full capacity cophase supply current transformer CPIt inputs side ports a and port b and uses closed-loop current control.Unsteady flow Device CPInput the electric current i of side ports aAWith the electric current i of port bBReference value ixrefBy its watt current reference value, reactive compensation Current reference value and the superposition of negative sequence compensation current reference value are constituted:
ixref=ixp_ref+ixq_ref+ixneg_ref(x=A, B)
Wherein, ixp_refIt is watt current reference value, ixq_refIt is reactive compensation current reference value, ixneg_refIt is negative sequence compensation Current reference value；X=A, ixref=iAref, it is non-full capacity cophase supply current transformer CPThe current reference value of side ports a is inputted, ixp_ref=iAp_ref, it is non-full capacity cophase supply current transformer CPInput the watt current reference value of side ports a, ixq_ref= iAq_ref, it is non-full capacity cophase supply current transformer CPInput the reactive compensation current reference value of side ports a, ixneg_ref= iAneg_ref, it is non-full capacity cophase supply current transformer CPInput the negative sequence compensation current reference value of side ports a；X=B, i.e. ixref =iBref, it is non-full capacity cophase supply current transformer CPInput the current reference value of side ports b, ixp_ref=iBp_ref, it is non-Quan Rong Measure cophase supply current transformer CPInput the watt current reference value of side ports b, ixq_ref=iBq_ref, it is non-full capacity cophase supply Current transformer CPInput the reactive compensation current reference value of side ports b, ixneg_ref=iBneg_ref, it is non-full capacity cophase supply unsteady flow Device CPInput the negative sequence compensation current reference value of side ports b.
Non- full capacity cophase supply current transformer CPActive power part use Double closed-loop of voltage and current, i.e., capacitor electricity Press CaAs outer voltage, non-full capacity cophase supply current transformer CPElectric current iA、iBRespectively it inputs side ports a's and port b Current inner loop.Non- full capacity cophase supply current transformer CPInput the watt current reference value i of side ports a and port bxp_refHave All thus the output of outer voltage is given for function amplitude, watt current reference value ixp_refPhase angle be equal to non-full capacity cophase supply Current transformer CPInput side voltage phase angle.
Non- full capacity cophase supply current transformer CPInput the reactive compensation current reference value i of side ports a, bxq_refAmplitude Equal to load current iloadRelative to non-full capacity cophase supply current transformer CPThe reactive current amplitude of input side voltage, port a's Reactive compensation current reference value iAq_ref90 ° of phase voltage of phase angular advance α, the reactive compensation current reference value i of port bBq_ref's Phase delay β phase voltage uβn290 °, x=A, B.
Non- full capacity cophase supply current transformer CPInput the negative sequence compensation current reference value i of side ports a, bxneg_refAmplitude Electric current i is exported equal to tractive transformerαAnd iβThe half of the difference in magnitude of middle watt current, phase angle and respective input side arc in phase Position, x=A, B.
The non-full capacity cophase supply current transformer CPThe H bridge of high frequency transformer side uses 50% duty ratio open loop control System, non-full capacity cophase supply current transformer CPInput side ports a, port b and outlet side port c between pass through series resonance pass Defeated active power, ensure that Zero Current Switch.
Detailed description of the invention
Fig. 1 is the non-through cophase supply device circuit diagram of full capacity of the present invention；
Fig. 2 is the non-through cophase supply current transformer internal circuit schematic diagram of full capacity of the present invention；
Fig. 3 is the contact net voltage and current transformer output voltage waveforms that emulation obtains；
Fig. 4 be emulation obtain using the network side current waveform before and after control method of the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the non-through cophase supply device circuit diagram of full capacity of the present invention.As shown in Figure 1, the present invention is non-complete The through cophase supply device of capacity includes a Scott tractive transformer TtracWith a non-full capacity cophase supply current transformer CP.Scott tractive transformer TtracInput side be connected with three phase network, Scott tractive transformer TtracOutlet side and non-complete Capacity cophase supply current transformer CPInput side be connected, non-full capacity cophase supply current transformer CpOutlet side and Scott transformer α phase export series connection with β phase and be followed by contact net.
Scott tractive transformer TtracThree terminals of input side are a, b, c, and four terminals of outlet side are α, n1, β, n2.It is non- Full capacity cophase supply current transformer CPInput side ports a terminal be a1、a2, the terminal of port b is b1、b2, outlet side port c Terminal be c1、c2.Connection type is as follows:
Scott tractive transformer TtracThree terminals a, b, c of input side respectively with A, B, C three-phase phase of three phase network Even, Scott tractive transformer TtracThe terminal α of input side and non-full capacity cophase supply current transformer CPInput side ports a end Sub- a1Connection, Scott tractive transformer TtracThe terminal n of outlet side1With non-full capacity cophase supply current transformer CPInput side The terminal a of mouth a2Connection, Scott tractive transformer TtracThe terminal β of outlet side and non-full capacity cophase supply current transformer CPIt is defeated The terminal b of entry end mouth b1Connection, Scott tractive transformer TtracThe terminal n of outlet side2With non-full capacity cophase supply unsteady flow Device CPInput side ports b terminal b2Connection.Scott tractive transformer TtracOutlet side terminal α is connected with contact net, Scott Tractive transformer TtracOutlet side terminal n1With Scott tractive transformer TtracThe terminal β of outlet side is connected, Scott traction voltage transformation Device TtracOutlet side terminal n2With non-full capacity cophase supply current transformer CPThe terminal c of outlet side port c2It is connected, non-full capacity is same Mutually for electric converter CPThe terminal c of outlet side port c1It is connected with rail.
Fig. 2 is the through cophase supply current transformer C of non-full capacityPInternal circuit schematic diagram.As shown in Fig. 2, non-full capacity Through cophase supply current transformer is by switch Sx1-8, DC capacitor Cx, ac filter inductance Lx, resonant capacitance CrxAnd high frequency becomes Depressor THFComposition.Switch Sx1With switch Sx2Points of common connection be Jx1, switch Sx3With switch Sx4Points of common connection be Jx2, open Close Sx5With switch Sx6Points of common connection be Jx3, switch Sx7With switch Sx8Points of common connection be Jx4.Switch Sx1、Sx3、Sx5、 Sx7Collector and capacitor CxAnode be connected, switch Sx2、Sx4、Sx6、Sx8Emitter and capacitor CxCathode be connected.Filtering One end of inductance Lx and AC port x1It is connected, the other end and points of common connection J of filter inductance Lxx1It is connected.Resonant capacitance Crx One end and points of common connection Jx3It is connected, resonant capacitance CrxThe other end and high frequency transformer THFTerminal yxIt is connected.High frequency becomes Depressor THFTerminal xxRespectively with points of common connection Jx4It is connected, subscript x=a, b, c.Filter capacitor CfBoth ends be separately connected friendship Flow output terminal c1And c2。
The control method of the non-through cophase supply device of full capacity of the present invention is as follows:
The non-full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control.Non- Quan Rong Measure cophase supply current transformer CPIt inputs side ports a and port b and uses closed-loop current control.It is specific as follows:
Non- full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control.Reference voltage is given Value uinv_refBy required contact net voltage ucatenaryWith Scott tractive transformer Ttracα phase and β be connected in series output electricity Press uαn1+uβn2Subtract each other to obtain, it may be assumed that
uinv_ref=ucatenary-(uαn1+uβn2)
Wherein, uαn1For Scott transformer Ttracα phase output voltage, i.e. Scott tractive transformer TtracOutlet side terminal α and terminal n1Between voltage, uβn2For Scott transformer Ttracβ phase output voltage, i.e. Scott tractive transformer TtracIt is defeated Outside end sub- β and terminal n2Between voltage, by Scott tractive transformer Ttracα phase export series connection, i.e. Fig. 1 with β phase Shown in terminal n1 be connected with β, obtain series connection output voltage uαn1+uβn2；uαn1-uβn2It is greater than 1 for the 1/k of contact net voltage, k Integer.
Non- full capacity cophase supply current transformer CPThe non-full capacity of (k-1)/k that the voltage of port c is equal to contact net voltage is same Mutually for electric converter CPThe electric current of port c is equal to load current, non-full capacity cophase supply current transformer CPThe function of outlet side port c Rate is bearing power (k-1)/k, i.e., non-full capacity cophase supply current transformer CPCapacity be load capacity (k-1)/k, k is Integer greater than 1.
The non-full capacity cophase supply current transformer CPIt inputs side ports a and port b and uses closed-loop current control.It is non-complete Capacity cophase supply current transformer CPInput the electric current i of side ports aAWith the electric current i of input side ports bBReference value ixrefHad by it Function current reference value, reactive compensation current reference value and the superposition of negative sequence compensation current reference value are constituted:
ixref=ixp_ref+ixq_ref+ixneg_ref(x=A, B)
Wherein, ixp_refIt is watt current reference value, ixq_refIt is reactive compensation current reference value, ixneg_refIt is negative sequence compensation Current reference value；X=A, ixref=iAref, it is non-full capacity cophase supply current transformer CPThe current reference value of side ports a is inputted, ixp_ref=iAp_ref, it is non-full capacity cophase supply current transformer CPInput the watt current reference value of side ports a, ixq_ref= iAq_ref, it is non-full capacity cophase supply current transformer CPInput the reactive compensation current reference value of side ports a, ixneg_ref= iAneg_ref, it is non-full capacity cophase supply current transformer CPInput the negative sequence compensation current reference value of side ports a；X=B, i.e. ixref =iBref, it is non-full capacity cophase supply current transformer CPInput the current reference value of side ports b, ixp_ref=iBp_ref, it is non-Quan Rong Measure cophase supply current transformer CPInput the watt current reference value of side ports b, ixq_ref=iBq_ref, it is non-full capacity cophase supply Current transformer CPInput the reactive compensation current reference value of side ports b, iXneg_ref=iBneg_ref, it is non-full capacity cophase supply unsteady flow Device CPInput the negative sequence compensation current reference value of side ports b.
Non- full capacity cophase supply current transformer CPActive power part use Double closed-loop of voltage and current, i.e., capacitor electricity Press CaAs outer voltage, non-full capacity cophase supply current transformer CPInput the electric current i of side ports a and port bA、iBRespectively as Its current inner loop for inputting side ports a and port b.Non- full capacity cophase supply current transformer CPInput side ports a's and port b has Function current reference value ixp_refActive amplitude by all thus the output of outer voltage gives, watt current reference value ixp_refPhase Angle is equal to non-full capacity cophase supply current transformer CPInput side voltage phase angle.
Non- full capacity cophase supply current transformer CPInput the reactive compensation current reference value i of side ports a and port bxq_ref's Amplitude is equal to load current iloadRelative to non-full capacity cophase supply current transformer CPThe reactive current amplitude of input side voltage, end The reactive compensation current reference value i of mouth aAq_ref90 ° of phase voltage of phase angular advance α, the reactive compensation current reference value of port b iBq_refPhase delay β phase voltage uβn2 90°。
Non- full capacity cophase supply current transformer CPInput the negative sequence compensation current reference value i of side ports a and port bxneg_ref Amplitude be equal to Scott tractive transformer TtracExport electric current iαAnd iβThe half of the difference in magnitude of middle watt current, phase angle and respectively Input side voltage in phase, x=A, B.
Non- full capacity cophase supply current transformer CPThe H bridge of high frequency transformer side uses 50% duty ratio opened loop control, non-complete Capacity cophase supply current transformer CPInput side ports a, port b and outlet side port c between transmitted by series resonance it is active Power ensure that Zero Current Switch.
The device simulation model parameter for 27.5kV ac contactor net built using the present invention is as follows:
Fig. 3 and Fig. 4 is the computer artificial result using the non-through same phase electric installation of capacity of the present invention.In Fig. 3, Ucatenary is contact net voltage waveform, and uinv is current transformer output voltage waveforms.From simulation result as it can be seen that current transformer exports Voltage uinv is the half of contact net voltage ucatenary, and the output electric current of current transformer is identical as load current, so current transformer Capacity and the ratio of load capacity be 1:2, realize current transformer non-full capacity operation.In Fig. 4, ia, ib, ic are respectively power grid A, B, C three-phase current were controlled 0.1 second moment according to control method of the present invention, from simulation result as can be seen that at the 0.1s moment Before, grid side, which has a large amount of idle and negative-sequence currents, can effectively inhibit three phase network after control method of the invention The negative-sequence current and reactive current of side.

Claims (6)

1. a kind of through cophase supply device of non-full capacity, it is characterised in that: the through cophase supply of non-full capacity Device is by a Scott tractive transformer TtracWith a non-full capacity cophase supply current transformer CPIt constitutes；Non- full capacity cophase supply Electric converter CPThe internal electrical isolation that input side and outlet side are carried out by high frequency transformer；Scott tractive transformer TtracIt is defeated Entering the terminal of side three is a, b, c, and four terminals of outlet side are α, n1, β, n2, non-full capacity cophase supply current transformer CPInput side The terminal of port a is a1、a2, the terminal of input side ports b is b1、b2, the terminal of outlet side port c is c1、c2,；Scott traction Transformer TtracThree terminals a, b, c of input side are connected with A, B, C three-phase of three phase network respectively, Scott tractive transformer TtracOutlet side terminal α and non-full capacity cophase supply current transformer CPInput side ports a terminal a1Connection, Scott traction become Depressor TtracThe terminal n of outlet side1With non-full capacity cophase supply current transformer CPInput side ports a terminal a2Connection, Scott tractive transformer TtracThe terminal β of outlet side and non-full capacity cophase supply current transformer CPInput side ports b terminal b1Connection, Scott tractive transformer TtracThe terminal n of outlet side2With non-full capacity cophase supply current transformer CPInput side ports The terminal b of b2Connection；Scott tractive transformer TtracOutlet side α and β be connected in series after with non-full capacity cophase supply current transformer CP Outlet side port c series connection, powers for contact net, i.e. Scott tractive transformer TtracOutlet side terminal α is connected with contact net, Scott tractive transformer TtracOutlet side terminal n1With Scott tractive transformer TtracThe terminal β of outlet side is connected, Scott Tractive transformer TtracOutlet side terminal n2With non-full capacity cophase supply current transformer CPThe terminal c of outlet side port c2It is connected, Non- full capacity cophase supply current transformer CPThe terminal c of outlet side port c1It is connected with rail.
2. the control method of the through cophase supply device of non-full capacity described in claim 1, it is characterised in that: described is non- Full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control, non-full capacity cophase supply current transformer CP It inputs side ports a and port b and uses closed-loop current control.
3. the control method of the non-through cophase supply device of full capacity as claimed in claim 2, it is characterised in that: described Non- full capacity cophase supply current transformer CPOutlet side port c uses output voltage closed-loop control, reference voltage given value uinv_ref's Value is by required contact net voltage ucatenaryWith Scott tractive transformer Ttracα phase and β are connected in series output voltage uαn1+uβn2Phase Subtract to obtain, it may be assumed that
uinv_ref=ucatenary-(uαn1+uβn2)
Wherein, uαn1For Scott transformer α phase output voltage, i.e. Scott tractive transformer TtracOutlet side terminal α and terminal n1Between voltage, uβn2For Scott transformer Ttracβ phase output voltage, i.e. Scott tractive transformer TtracDelivery side Sub- β and terminal n2Between voltage, by Scott tractive transformer Ttracα phase and β phase export series connection, i.e. terminal n1 and end Sub- β is connected, and obtains series connection output voltage uαn1+uβn2；uαn1+uβn2It is the integer greater than 1 for the 1/k of contact net voltage, k；
Current transformer CPThe voltage of outlet side port c is equal to (the k-1)/k, current transformer C of contact net voltagePThe electric current of outlet side port c Equal to load current, unsteady flow CPThe power of outlet side device port c is bearing power (k-1)/k, i.e. unsteady flow CPThe appearance of outlet side device Amount is load capacity (k-1)/k, and k is the integer greater than 1.
4. the control method of the non-through cophase supply device of full capacity as claimed in claim 2, it is characterised in that: described Non- full capacity cophase supply current transformer input side ports a and port b uses closed-loop current control；Non- full capacity cophase supply unsteady flow Device CPInput the electric current i of side ports aAWith the electric current i of port bBReference value by its watt current reference value, reactive compensation electric current Reference value and the superposition of negative sequence compensation current reference value are constituted:
ixref=ixp_ref+ixq_ref+ixneg_ref(x=A, B)
Wherein, ixp_refIt is watt current reference value, ixq_refIt is reactive compensation current reference value, ixneg_refIt is negative sequence compensation electric current Reference value, x=A, ixref=iAref, it is non-full capacity cophase supply current transformer CPInput the current reference value of side ports a, ixp_ref =iAp_ref, it is non-full capacity cophase supply current transformer CPInput the watt current reference value of side ports a, ixq_ref=iAq_ref, it is Non- full capacity cophase supply current transformer CPInput the reactive compensation current reference value of side ports a, ixneg_ref=iAneg_ref, it is non-complete Capacity cophase supply current transformer CPInput the negative sequence compensation current reference value of side ports a；X=B, i.e. ixref=iBref, it is non-Quan Rong Measure cophase supply current transformer CPInput the current reference value of side ports b, ixp_ref=iBp_ref, it is non-full capacity cophase supply unsteady flow Device CPInput the watt current reference value of side ports b, ixq_ref=iBq_ref, it is non-full capacity cophase supply current transformer CPInput side The reactive compensation current reference value of port b, ixneg_ref=iBneg_ref, it is non-full capacity cophase supply current transformer CPInput side ports The negative sequence compensation current reference value of b.
5. the control method of the non-through cophase supply device of full capacity as claimed in claim 2, it is characterised in that: non-Quan Rong Measure cophase supply current transformer CPActive power part use Double closed-loop of voltage and current, i.e. capacitance voltage CaOutside as voltage Ring, electric current iA、iBRespectively non-full capacity cophase supply current transformer CPInput the current inner loop of side ports a and port b；Non- Quan Rong Measure cophase supply current transformer CPInput the watt current reference value i of side ports a and port bxp_refActive amplitude all by the electricity Press the output of outer ring given, watt current reference value ixp_refPhase angle be equal to non-full capacity cophase supply current transformer CPInput side The phase angle of voltage；
Reactive compensation current reference value ixq_refAmplitude be equal to load current iloadReactive current width relative to input side voltage Value, the reactive compensation current reference value i of α phaseAq_ref90 ° of phase voltage of phase angular advance α, the reactive compensation current reference value of β phase iBq_refPhase delay β phase voltage uβn290°；
Negative sequence compensation current reference value ixneg_refAmplitude be equal to Scott tractive transformer TtracExport electric current iαAnd iβIn it is active The half of the difference in magnitude of electric current, phase angle and respective input side voltage in phase；X=A, i.e. ixneg_ref=iAneg_ref, it is non-Quan Rong Measure cophase supply current transformer CPThe negative sequence compensation current reference value of side ports a is inputted, x=B, that is, ixref=iBref is non-Quan Rong Measure cophase supply current transformer CPInput the negative sequence compensation current reference value of side ports b.
6. the non-through cophase supply device of full capacity as described in claim 1, it is characterised in that: the non-full capacity is same Mutually 50% duty ratio opened loop control, non-full capacity cophase supply current transformer C are used for the H bridge of electric converter high frequency transformer sideP Input side ports a, port b and outlet side port c between by series resonance transmitting active power, guarantee Zero Current Switch.
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