CN109305065B - Intelligent phase splitter of alternating current electrified railway without power outage - Google Patents
Intelligent phase splitter of alternating current electrified railway without power outage Download PDFInfo
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- CN109305065B CN109305065B CN201710697761.0A CN201710697761A CN109305065B CN 109305065 B CN109305065 B CN 109305065B CN 201710697761 A CN201710697761 A CN 201710697761A CN 109305065 B CN109305065 B CN 109305065B
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- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
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Abstract
The invention discloses an intelligent phase splitter for an alternating current electrified railway without power outage, which comprises two fast switches, an arc extinction adjustable power supply, a neutral region voltage transition step phase shifting power supply and an intelligent phase splitter control unit with a train pantograph position identification function. The intelligent phase splitter control unit can determine the positions of the anchor section joints and the neutral section of the pantograph at two sides of the train according to the voltage and current information in the device. The arc extinction adjustable power supply is connected in series in the first quick switch loop or the second quick switch loop, so that most of currents of all pantographs at the joint of the anchor section and in the neutral zone flow through the first quick switch or the second quick switch, and electric arcs when the pantograph of the train enters or leaves the neutral zone are inhibited or eliminated. The staged phase-shifting power supply can generate a plurality of different intermediate voltages with phases between the voltage of the first power supply arm and the voltage of the second power supply arm, and therefore the train can be enabled to smoothly transit from the first power supply arm section to the second power supply arm section without losing power.
Description
Technical Field
The invention relates to the technical field of electrified railway passing neutral section, in particular to a train electrified passing neutral section device controlled by the conversion of an alternating current electrified railway ground switch.
Background
The alternating current electrified railway in China mainly adopts a single-phase power frequency phase-change power supply mode. In order to avoid interphase short circuit, a section of contact net with two ends provided with electric subsections is arranged at the outlet of the traction substation and the partition pavilion, namely, an electric split phase. The electric phase separation is mainly divided into a device type and an articulated type, and the articulated type is more. The articulated electric phase splitting is composed of a neutral zone and two anchor section joints. Since the neutral contact system is not charged, the vehicle-mounted equipment or the ground device needs to be specially operated when the train passes through.
In order to ensure that the train is continuously subjected to current and smoothly passes through the electric phase splitting, a plurality of different ground-electricity phase splitting systems are sequentially proposed. However, these charged-neutral passing systems all suffer from various degrees of drawbacks. The ground automatic passing neutral section system based on the mechanical switch has the defects of short service life of the mechanical switch, high failure rate, long neutral section power-off time, requirement of matching a vehicle network and the like. The fixed investment cost of the frequency conversion phase shift uninterrupted power supply neutral section passing system is high, and the problems of complex control, difficulty in adapting to multi-pantograph trains and the like exist. The ground automatic neutral section passing system based on the high-voltage thyristor valve group is influenced by the characteristics of a vehicle-mounted traction transformer and a vehicle-mounted four-quadrant converter, and the power failure switching process of a neutral section still needs train cooperation. However, because of the huge number and various types of trains in China, the modification of a train control algorithm for the application of a charged neutral-section passing system requires coordination of multiple departments, and is difficult in actual operation and high in cost.
In addition, in the existing live automatic neutral section system, each time the train runs to the anchor section joint switching area, a serious electric arc is often generated. The electric arc frequently occurs, so that the ablation of the contact net is accelerated, and the maintenance workload of the line is greatly increased.
The invention discloses an improved intelligent electric phase splitting device for an alternating current electrified railway, which is characterized in that two connecting wires are arranged between a change-over switch and a neutral zone, so that on one hand, the real-time accurate judgment of the position of a train pantograph in the neutral zone is realized, on the other hand, the inductance of a connecting wire of a quick switch is minimized by adopting modes such as adjacent wiring or a twisted pair insulated cable, and the like, and further, the electric arc when the train pantograph enters or leaves the neutral zone is restrained or even eliminated. The quick switch connecting line refers to a wire which is led out from two sides of the quick switch and is respectively connected with a power supply arm in the anchor section joint conversion area and a neutral section contact net. However, due to the large train traction current, the difficulty in practical operation is high when the transfer switch connecting line adopts the twisted pair insulated cable. The twisted pair insulated cable is high in cost and is not beneficial to popularization in application occasions such as non-tunnels, elevated buildings and the like.
Therefore, the invention provides a novel uninterrupted intelligent phase splitter for an alternating current electrified railway, which can inhibit or even eliminate electric arcs when a pantograph of a train enters or leaves a neutral zone at lower cost, can realize that the train passes through electric phase splitting stably without power outage and speed loss, and does not need train cooperation. The switch of the uninterrupted intelligent phase splitter still adopts a high-voltage thyristor valve group, and has the advantages of long service life, high reliability, convenience in operation and maintenance and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an intelligent phase splitter for an alternating current electrified railway without power outage. One of the technical problems to be solved by the invention is that the arc extinction adjustable power supply unit of the intelligent phase splitter without power failure is reasonably controlled, the voltage drop generated by the inductance of the fast switch connecting circuit is dynamically compensated, and the distribution proportion of the traction current in the fast switch connecting circuit and the power supply arm contact network is changed, so that the electric arc when the pantograph of the train enters or leaves the neutral zone is restrained or even eliminated. The invention aims to solve another technical problem that under the premise of no train cooperation, the power supply of the train in a neutral region is transited from the voltage of a first power supply arm to one or more intermediate voltages with phases between power supply arms on two sides and then to the voltage of a second power supply arm by reasonably controlling the stepped phase-shifting power supply unit of the intelligent phase splitter without power outage, so that the electric phase splitting of the train pantograph is realized without power outage, stability and speed loss.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
an intelligent phase splitter without power outage for an alternating current electrified railway comprises a first fast switch 11, a second fast switch 12, a first impedance 13, a second impedance 14, a first arc extinction adjustable power supply 15, a second arc extinction adjustable power supply 16, a stepped phase shifting power supply 18 and an intelligent phase splitter control unit 8;
the first power supply arm 1, the first anchor section joint conversion area 5, the stepped phase-shifting power supply 18, the first fast switch 11, the first impedance 13, the first arc extinction adjustable power supply 15 and the plurality of connecting lines form a first fast switch loop; the second power supply arm 2, the second anchor section joint conversion area 6, the stepped phase-shifting power supply 18, the second fast switch 12, the second impedance 14, the second arc extinction adjustable power supply 16 and a plurality of connecting lines form a second fast switch loop;
the first fast switch 11 is connected with a first impedance 13 in parallel, the second fast switch 12 is connected with a second impedance 13 in parallel, and the intelligent phase splitter control unit 8 is connected with the first fast switch 11, the second fast switch 12 and the stepped phase shift power supply 18 at the same time;
the uninterrupted intelligent phase splitter enables a train pantograph to pass through the neutral zone 3, and in the process of obtaining the voltage of a first power supply arm 1 from the closing of a first quick switch 11, obtaining the voltage of a second power supply arm 2 from the opening of a first quick switch 11 and the closing of a second quick switch 12 and cutting off the voltage of the second power supply arm 2 from the opening of the second quick switch 12, the uninterrupted power supply of a pantograph 7 of the train is realized when the train passes through the neutral zone 3 and enters the second power supply arm 2 from the first power supply arm 1, and electric arcs generated by current collection of the pantograph 7 passing through a first anchor section joint conversion zone 5 and a second anchor section joint conversion zone 6 are eliminated.
In the above scheme, the connecting wires include a first connecting wire 9 and a second connecting wire 10, the first connecting wire 9 is located in the first fast switch loop, and the second connecting wire 10 is located in the second fast switch loop; the first fast switch 11, the second fast switch 12, the first connecting wire 9 and the second connecting wire 10 are all provided with current sensors; voltage sensors are arranged on two sides of the first fast switch 11 and the second fast switch 12; and the current sensor and the voltage sensor are both connected with the intelligent phase splitter control power supply 8.
On the basis of the above scheme, the first arc extinction adjustable power supply 15 and the second arc extinction adjustable power supply 16 can be replaced by an arc extinction adjustable power supply 17; after replacement, the arc extinction adjustable power supply 17 is arranged between the connection point of the first connection lead 9 and the second connection lead 10 and the stepped phase shift power supply 18.
On the basis of the scheme, the position of the train pantograph 7 before the first quick switch 11 is closed is identified, and the position is judged by that the pantograph 7 simultaneously contacts a contact net of the first power supply arm 1 and a contact net of the neutral zone 3 at the first anchor section joint conversion area 5 and the second anchor section joint conversion area 6 so that the voltage at two ends of the first quick switch 11 is zero or the voltage of the neutral zone 3 suddenly changes;
the position of the train pantograph 7 switched from the first fast switch 11 to the second fast switch 12 is identified in the neutral zone 3, and is judged by the current of the first connecting wire 9 and the second connecting wire 10 connected to the joint of the first fast switch 11 and the second fast switch 12 in the neutral zone 3;
the identification of the position of the train pantograph 7 before the second fast switch 12 is disconnected is judged by that the current flowing through the second fast switch 12 is zero, or the last pantograph in the train drives into the second anchor segment joint conversion area 6 so that the voltage at two ends of the second fast switch 12 is zero or the voltage of the neutral zone 3 changes suddenly.
On the basis of the above scheme, the first arc extinction adjustable power supply 15 or the arc extinction adjustable power supply 17 is connected in series in the first fast switch circuit, and can suppress or even eliminate the arc between the catenary of the first anchor segment joint switching area 5 and the pantograph 7, and the second arc extinction adjustable power supply 16 or the arc extinction adjustable power supply 17 is connected in series in the second fast switch circuit, and can suppress or even eliminate the arc between the catenary of the second anchor segment joint switching area 6 and the pantograph 7.
On the basis of the scheme, the first arc extinction adjustable power supply 15, the second arc extinction adjustable power supply 16 or the arc extinction adjustable power supply 17 is obtained by isolating and transforming a voltage of a first power supply arm 1, a voltage of a second power supply arm 2 or other power supply voltages through a transformer, then rectifying and inverting the isolated and transformed voltages, and connecting an inverted output single-phase alternating-current voltage to a first quick switch loop or a second quick switch loop;
or the voltage of the first power supply arm 1, the voltage of the second power supply arm 2 or other power supply voltages are respectively isolated and transformed to lead out different tap voltages, and then the different tap voltages are connected and combined through electronic switches such as thyristors and the like and then are connected into the first quick switch loop or the second quick switch loop to obtain the voltage.
The staged phase shifting power supply 18 can be obtained in the following three ways:
the first method is as follows: the stepped phase shift power supply 18 is composed of different tap voltages led out after voltage transformation is respectively isolated by the voltage of the first power supply arm 1 and the voltage of the second power supply arm 2, and is connected and combined by electronic switches such as a thyristor and the like, and then the first fast switch 11 is connected with the voltage of the first power supply arm 1 or the second fast switch 12 is connected with the voltage of the second power supply arm 2, so that the neutral region 3 sequentially obtains the voltage of the first power supply arm 1, a plurality of intermediate voltages with phases gradually increased or decreased, and the voltage of the second power supply arm 2.
The second method comprises the following steps: the stepped phase-shift power supply 18 may also be configured to perform rectification and inversion after the voltage of the first power supply arm 1, the voltage of the second power supply arm 2, or other power supply voltages are isolated and transformed by a transformer, and output single-phase ac voltage after inversion is connected to the voltage of the first power supply arm 1 or the voltage of the second power supply arm 2, so that the neutral region 3 sequentially obtains the voltage of the first power supply arm 1, a plurality of intermediate voltages of which phases are increased or decreased in steps, and the voltage of the second power supply arm 2.
The third method comprises the following steps: the stepped phase-shift power supply 18 is obtained by combining the inverted stepped phase-shift power supply outputting the single-phase alternating-current voltage and a stepped phase-shift power supply obtained by combining a transformer winding tap through electronic switches such as a thyristor and the like; the specific mode is as follows: the inverted output single-phase alternating-current voltage is sequentially connected to different tap voltages led out after the isolation transformation, the voltage of the first power supply arm 1 obtained after the combination of thyristors, a plurality of intermediate voltages with phases gradually increasing or decreasing, and the voltage of the second power supply arm 2, so that a plurality of intermediate voltages with smaller phase difference ratios of two adjacent voltages with gradually increasing or decreasing phases can be sequentially obtained after the neutral area 3 obtains the voltage of the first power supply arm 1 and before the voltage of the second power supply arm 2.
On the basis of the above scheme, the number of the plurality of intermediate voltages generated by the stepped phase-shift power supply 18 is related to the phase difference between the voltage of the first power supply arm 1 and the voltage of the second power supply arm 2, and the specific number is determined by the following conditions: when the voltage of the neutral zone 3 jumps in stages from the voltage of the first power supply arm 1 to the voltage of the second power supply arm 2 through the intermediate voltage, the jump between every two adjacent voltages cannot cause the train to enter protective working states such as overvoltage, undervoltage or overcurrent due to transient fluctuation of current and/or voltage.
The invention provides an intelligent phase splitter for an alternating current electrified railway without power outage, which has the beneficial effects that:
according to the uninterrupted intelligent phase splitter for the alternating current electrified railway, on one hand, the voltage drop generated by the inductance of the quick switching connection circuit can be dynamically compensated, so that electric arcs when a train pantograph 7 enters or leaves a neutral zone 3 are restrained or even eliminated; on the other hand, the electric phase splitting can be realized without train cooperation, and the train can stably pass through the electric phase splitting without power failure and speed loss. In addition, due to the adoption of an active arc extinction power supply technology, a double-twisted insulated cable is not needed in a quick switch connecting circuit, the cost is relatively low, and the construction difficulty and the fixed investment cost are greatly reduced.
Drawings
The invention has the following drawings:
FIG. 1(a) is a schematic structural diagram of a first embodiment of the uninterruptible intelligent phase splitter for an alternating current electrified railway of the present invention;
FIG. 1(b) is a schematic structural diagram of a second embodiment of the uninterruptible intelligent phase splitter for an alternating current electrified railway of the present invention;
FIG. 2(a) is a schematic view of an installation structure of an arc extinction adjustable power supply embodiment of the invention in an intelligent phase splitter of an alternating current electrified railway without power outage;
fig. 2(b) is a schematic circuit structure diagram of a first embodiment of the arc extinction adjustable power supply topology circuit of the invention;
fig. 2(c) is a schematic circuit structure diagram of a second embodiment of the arc extinction adjustable power supply topology circuit of the invention;
FIG. 3(a) is a schematic diagram of an installation structure and a circuit structure of a non-stop intelligent phase splitter for an electrified railway in accordance with an embodiment of the present invention;
FIG. 3(b) is a schematic view of the installation structure of the second embodiment of the stepped phase-shifting power supply of the present invention in the uninterrupted intelligent phase splitter for an AC electrified railway;
FIG. 3(c) is a schematic diagram of the installation structure and part of the circuit structure of the third embodiment of the stepped phase-shifting power supply of the present invention in the uninterrupted intelligent phase splitter for an AC electrified railway;
FIG. 3(d) is a schematic circuit diagram of a topology circuit implementation of the second or third embodiment of the present invention.
In the figure, 1-a first power supply arm, 2-a second power supply arm, 3-a neutral zone, 4-a steel rail, 5-a first anchor section joint conversion zone, 6-a second anchor section joint conversion zone, 7-a pantograph, 8-a smart phase splitter control unit, 9-a first connecting wire, 10-a second connecting wire, 11-a first fast switch, 12-a second fast switch, 13-a first impedance, 14-a second impedance, 15-a first arc extinction adjustable power supply, 16-a second arc extinction adjustable power supply, 17-an arc extinction adjustable power supply, 18-a stepped phase shift power supply, 19-a common connection point of the arc extinction adjustable power supply with the first fast switch and the second fast switch, 20-a common connection point of the arc extinction adjustable power supply with the first connecting wire and the second connecting wire of the neutral zone, 21-a first input transformer of the arc extinction adjustable power supply, 22-a second input transformer of the arc extinction adjustable power supply, 23-an output transformer of the arc extinction adjustable power supply, 24-a first rectifier of the arc extinction adjustable power supply, 25-a second rectifier of the arc extinction adjustable power supply, 26-an arc extinction adjustable power supply inverter, 27-a third input transformer of the arc extinction adjustable power supply, 28-a fourth input transformer of the arc extinction adjustable power supply, 29-40-a voltage adjusting switch of the arc extinction adjustable power supply, 41-a first input transformer of the stepped phase shift power supply, 42-a second input transformer of the stepped phase shift power supply, 43-a first change-over switch of the stepped phase shift power supply, 44-a second change-over switch of the stepped phase shift power supply, 45-a parallel impedance across the first change-over switch of the stepped phase shift power supply, 46-impedance connected in parallel at two ends of a second transfer switch of the stepped phase-shifting power supply, 47-a third transfer switch of the stepped phase-shifting power supply, 48-a fourth transfer switch of the stepped phase-shifting power supply, 49-a common connection point of the stepped phase-shifting power supply, the first fast switch and the second fast switch, 50-a common connection point of the stepped phase-shifting power supply, the neutral region first connection lead and the second connection lead, 51-a third input transformer of the stepped phase-shifting power supply, 52-a fourth input transformer of the stepped phase-shifting power supply, 53-an output transformer of the stepped phase-shifting power supply, 54-a first rectifier of the stepped phase-shifting power supply, 55-a second rectifier of the stepped phase-shifting power supply and 56-a stepped phase-shifting power supply inverter.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It is to be emphasized that the above-described drawings and the following description are exemplary only, and are not intended to limit the scope of the invention and its application.
Referring to fig. 1(a), the uninterrupted intelligent phase splitter of the alternating current electrified railway comprises two fast switches 11 and 12, parallel impedances 13 and 14 at two ends of the fast switches, two arc extinction adjustable power supplies 15 and 16, a stepped phase shifting power supply 18, two neutral connection wires 9 and 10, two fast switches, connection wires of the arc extinction adjustable power supplies and power supply arms, and an intelligent phase splitter control unit 8 with a train pantograph position identification function; each fast switch 11, 12 and each neutral zone connecting lead 9, 10 is provided with a current sensor; voltage sensors are mounted on both sides of each fast switch 11, 12.
The current sensor, the voltage sensor, the fast switches 11 and 12, the arc extinction adjustable power supplies 15 and 16 and the drive control unit of the stepped phase shifting power supply 18 which are arranged in the device are connected with the intelligent phase splitter control unit 8. After the intelligent phase splitter control unit 8 acquires the current and voltage information, the position of the pantograph 7 of the train in the anchor section joint switching area 5 or 6 and the neutral area 3 can be accurately judged, and the closing and opening of the quick switches 11 and 12, the voltage regulation of the arc extinction adjustable power supplies 15 and 16 and the stepped phase-shifting power supply 18 and the safe and reliable switching of the power supply of the pantograph 7 of the train in the neutral area 3 from the first power supply arm 1 to the second power supply arm 2 are realized.
The working process of the uninterrupted intelligent phase splitter of the alternating current electrified railway is as follows:
when a train enters the neutral zone 3 through the first power supply arm 1, the intelligent phase splitter control unit 8 automatically identifies the position of the pantograph 7 in the first anchor section joint conversion zone 5 before the first current-receiving pantograph of the train enters the neutral zone 3 based on the detected voltage and current information of the first fast switch 11 and the lines nearby the first fast switch 11, and then closes the first fast switch 11, so that the first power supply arm 1 supplies power to the neutral zone 3, and the train enters the neutral zone 3 without power failure.
When each current-receiving pantograph of the train runs in the first anchor section joint conversion area 5 but does not completely enter the neutral zone 3, the intelligent phase splitter control unit 8 sequentially closes or opens the change-over switches of the first arc-suppression adjustable power supply 15 according to the acquired current and voltage information, further dynamically compensates the voltage drop caused by the inductance of the first fast switch loop, changes the distribution proportion of traction current in the first fast switch loop and the power supply arm contact network, and accordingly inhibits or even eliminates electric arcs when the train current-receiving pantograph 7 enters the neutral zone 3.
When all the pantograph 7 of the train leaves the first power supply arm 1 and enters the neutral zone 3, the intelligent phase splitter control unit 8 automatically judges the real-time position of the pantograph 7 when the train operates in the neutral zone 3 according to the current information of the two connecting wires 9 and 10 in the neutral zone, and starts to switch the power supply voltage of the neutral zone 3. The intelligent phase splitter control unit 8 controls the on/off of the change-over switch of the stepped phase-shifting power supply 18 in multiple steps according to sequential logic, and controls the on/off of the first fast switch 11 and the second fast switch 12 at the same time, so that the power supply of the neutral area 3 is switched from the power supply of the first power supply arm 1 to the power supply of the second power supply arm 2, and therefore the power supply of the train is switched from the power supply of the first power supply arm 1 to the power supply of the second power supply arm 2 smoothly without power outage when the neutral area 3 runs.
When each current-receiving pantograph of the train runs in the second anchor section joint conversion area 6 and completely leaves the neutral area 3, the intelligent phase splitter control unit 8 sequentially closes or opens the change-over switch of the second arc-extinction adjustable power supply 16 according to the acquired current and voltage information, so that the voltage drop generated by the inductance of the second quick switch loop is dynamically compensated, the distribution proportion of traction current in the second quick switch loop and the power supply arm contact network is changed, and the electric arc when the train current-receiving pantograph 7 leaves the neutral area 3 is restrained or even eliminated.
When a train enters the second power supply arm 2 from the neutral zone 3, the intelligent phase splitter control unit 8 automatically identifies the position of the last current-receiving pantograph 7 of the train after leaving the neutral zone 3 based on the detected voltage and current information of the second fast switch 12 and the lines nearby. After it is determined that the last pantograph has moved away from the second anchor segment joint switching area 6 and into the second power supply arm 2, the second fast switch 12 is turned off.
Referring to fig. 1(b), the uninterrupted intelligent phase splitter of the alternating current electrified railway comprises two fast switches 11 and 12, parallel impedances 13 and 14 at two ends of the fast switches, an arc extinction adjustable power supply 17, a stepped phase shifting power supply 18, two neutral zone connecting wires 9 and 10, connecting wires of the two fast switches and a power supply arm, and an intelligent phase splitter control unit 8 with a train pantograph position identification function; each fast switch 11, 12 and each neutral zone connecting lead 9, 10 is provided with a current sensor; voltage sensors are mounted on both sides of each fast switch 11, 12.
The current sensor, the voltage sensor, the fast switches 11 and 12, the arc extinction adjustable power supply 17 and the drive control unit of the stepped phase-shifting power supply 18 which are arranged in the device are all connected with the intelligent phase splitter control unit 8. After the intelligent phase splitter control unit 8 acquires the current and voltage information, the position of the pantograph 7 of the train in the anchor section joint switching area 5 or 6 and the neutral area 3 can be accurately judged, and the closing and opening of the quick switches 11 and 12, the voltage regulation of the arc extinction adjustable power supply 17 and the stepped phase-shifting power supply 18 and the safe and reliable switching of the power supply of the pantograph 7 of the train in the neutral area 3 from the first power supply arm 1 to the second power supply arm 2 are realized.
The working process of the uninterrupted intelligent phase splitter of the alternating current electrified railway is as follows:
when a train enters the neutral zone 3 through the first power supply arm 1, the intelligent phase splitter control unit 8 automatically identifies the position of the pantograph 7 at the first anchor section joint switching zone 5 before the first current-receiving pantograph of the train enters the neutral zone based on the detected voltage and current information of the first fast switch 11 and the lines nearby the first fast switch 11, and then closes the first fast switch 11, so that the first power supply arm 1 supplies power to the neutral zone 3, and the train enters the neutral zone 3 without power failure.
When each current-receiving pantograph of the train runs in the first anchor section joint conversion area 5 but does not completely enter the neutral area 3, the intelligent phase splitter control unit 8 sequentially closes or opens the change-over switches of the arc-extinguishing adjustable power supply 17 according to the acquired current and voltage information, further dynamically compensates the voltage drop caused by the inductance of the first fast switch loop, changes the distribution proportion of the traction current in the first fast switch loop and the power supply arm contact network, and accordingly inhibits or even eliminates the electric arc when the train pantograph 7 enters the neutral area.
When all the current-receiving pantographs 7 of the train leave the power supply arm 1 and enter the neutral zone 3, the intelligent phase splitter control unit 8 automatically judges the real-time position of the pantograph 7 when the train operates in the neutral zone 3 according to the current information of the two connecting wires 9 and 10 in the neutral zone, and starts to switch the power supply voltage of the neutral zone 3. The intelligent phase splitter control unit 8 controls the on/off of the change-over switch of the stepped phase-shifting power supply 18 in multiple steps according to sequential logic, and controls the on/off of the first fast switch 11 and the second fast switch 12 at the same time, so that the power supply of the neutral area 3 is switched from the power supply of the first power supply arm 1 to the power supply of the second power supply arm 2, and therefore the power supply of the train is switched from the power supply of the first power supply arm 1 to the power supply of the second power supply arm 2 smoothly without power outage when the neutral area 3 runs.
Before each current-receiving pantograph of the train completely leaves the neutral zone 3 in the second anchor section joint conversion zone 6, the intelligent phase splitter control unit 8 sequentially closes or opens the change-over switches of the arc-extinguishing adjustable power supply 17 according to the acquired current and voltage information, further dynamically compensates the voltage drop caused by the inductance of the second fast switch loop, changes the distribution proportion of the traction current in the second fast switch loop and the power supply arm contact network, and accordingly inhibits or even eliminates the electric arc when the train pantograph 7 leaves the neutral zone 3.
When a train enters the second power supply arm 2 from the neutral zone 3, the intelligent phase splitter control unit 8 automatically identifies the position of the last current-receiving pantograph 7 of the train after leaving the neutral zone 3 based on the detected voltage and current information of the second fast switch 12 and the lines nearby. After it is determined that the last pantograph has moved away from the second anchor segment joint switching area 6 and into the second power supply arm 2, the second fast switch 12 is turned off.
As can be seen by comparing fig. 1(a) and 1(b), the first arc suppression variable power supply 15 in the first fast switch 11 circuit and the second arc suppression variable power supply 16 in the second fast switch 12 circuit in fig. 1(a) can be replaced by an arc suppression variable power supply 17 common to the first fast switch 11 circuit and the second fast switch 12 circuit in fig. 1 (b). Therefore, the arc suppression adjustable power supply topology circuit is illustrated in fig. 2(a) and its arc suppression adjustable power supply 17.
Implementation case one of arc extinction adjustable power supply topology circuit
Fig. 2(a) shows an embodiment of a topology circuit of the arc suppression variable power supply 17 as shown in fig. 2 (b).
In fig. 2(b), an embodiment of the arc suppression tunable power supply topology of the present invention includes two input transformers 21, 22, two rectifiers 24, 25, an inverter 26, and an output transformer 23. One end of a high-voltage side winding of the first input transformer 21 is connected with a contact network of the first power supply arm 1, and the other end of the high-voltage side winding is connected with the steel rail 4; the low-side winding of the first input transformer 21 is connected to a first rectifier 24. One end of a high-voltage side winding of the second input transformer 22 is connected with a contact network of the second power supply arm 2, and the other end of the high-voltage side winding is connected with the steel rail 4; the low side winding of the second input transformer 22 is connected to a second rectifier 25. One end of a high-voltage side winding of the output transformer 23 is connected with a common connection point 19 of the arc extinction adjustable power supply and the first and second fast switches, and the other end of the high-voltage side winding is connected with a common connection point 20 of the arc extinction adjustable power supply and the first and second connecting wires; the low-voltage side winding of the output transformer 23 is connected to an arc-extinguishing variable power supply inverter 26. The first rectifier 24 and the second rectifier 25 are connected in parallel on the output direct current side and connected to the direct current input side of the arc suppression adjustable power inverter 26. The drive control units of the first rectifier 24, the second rectifier 25 and the arc extinction adjustable power inverter 26 are all connected with the intelligent phase splitter control unit.
Through the adjustable power inverter 26 of control arc extinction, can obtain an amplitude, the equal adjustable alternating voltage in phase place, and then dynamic compensation changes the distribution proportion of traction current at the quick switch interconnecting link, first power supply arm 1, second power supply arm 2 and neutral zone 3 contact net because of the voltage drop that quick switch interconnecting link inductance produced to the electric arc when train pantograph 7 leaves neutral zone 3 is suppressed or even eliminated.
Arc extinction adjustable power supply topology circuit implementation case two
Fig. 2(c) shows a second topology circuit embodiment of the arc suppression variable power supply 17 in fig. 2 (a).
In fig. 2(c), the second embodiment of the crowbar adjustable power topology of the present invention includes two input transformers 27, 28 and 12 voltage regulating switches 29-40 each outputting a three-level voltage. The drive control units of the voltage regulating switches 29-40 installed in the device are all connected with the control unit of the intelligent phase splitter.
In fig. 2(c), the high-voltage side winding of the third input transformer 27 of the arc-suppression adjustable power supply is connected to the first power supply arm 1 contact network and the steel rail 4, and the high-voltage side winding of the fourth input transformer 28 of the arc-suppression adjustable power supply is connected to the second power supply arm 2 contact network and the steel rail 4. The low side windings of both input transformers 27, 28 have three terminals. One ends of the voltage regulating switches 29-40 are connected with the terminal of the low-voltage side winding of the transformer, and the other ends are connected with the common connection point 19 of the arc extinction adjustable power supply and the first and second fast switches and the common connection point 20 of the two connecting wires 9 and 10.
By closing and opening different voltage regulating switches 29-40, alternating current output voltages of different phases and different amplitudes of the arc extinction adjustable power supply can be obtained. For example, closing the voltage regulating switches 30, 31, 35, 36, an ac output voltage proportional to the first supply arm voltage is obtained; closing the voltage regulating switches 29, 30, 36, 37 to obtain an ac output voltage proportional to the voltage of the second supply arm; closing the voltage regulating switches 30, 31, 36, 37 results in an ac output voltage which differs in phase from the voltage of the first supply arm and also differs in phase from the voltage of the second supply arm.
Implementation of a topology circuit with a stepped phase-shifting power supply
In one embodiment, the staged power supply can generate two intermediate voltages with phases between the voltage of the first power supply arm 1 and the voltage of the second power supply arm 2, as shown in fig. 3 (a). In this embodiment, the topology circuit of the stepped phase-shift power supply 18 includes two input transformers 41, 42, four transfer switches 43, 44, 47, 48, and parallel impedances 45, 46 at two ends of the transfer switches 43, 44; each of the switches 43, 44, 47, 48 is provided with a voltage sensor and a current sensor (not shown). The current sensor, the voltage sensor, and the drive control unit of each of the transfer switches 43, 44, 47, 48 installed in the above-described apparatus are connected to an intelligent phase splitter control unit (not shown).
The working process of the first embodiment of the stepped phase-shifting power supply 18 of the present invention is as follows:
1) when the first current-receiving pantograph of the train is driven into the neutral zone 3 by the first power supply arm 1, the first fast switch 11 and the first changeover switch 43 of the stepped phase-shift power supply are closed, and the second fast switch 12 and the other changeover switches 44, 47 and 48 of the stepped phase-shift power supply are kept in an open state. Neutral zone 3 then gets the first supply arm voltage supply;
2) when all the pantograph current collectors of the train are in the neutral zone 3 and the supply voltage switching in the neutral zone 3 is started, the first fast switch 11 is kept in a closed state, the first change-over switch 43 of the stepped phase-shift power supply is opened, the second change-over switch 44 and the third change-over switch 47 of the stepped phase-shift power supply are closed, and the second fast switch 12 and the fourth change-over switch 48 of the stepped phase-shift power supply are kept in an opened state. Neutral zone 3 then receives the first intermediate voltage supply. The phase of the first intermediate voltage is between the voltages of the two power supply arms and is adjacent to the voltage of the first power supply arm 1;
3) the first fast switch 11, the second transfer switch 44 and the third transfer switch 47 of the stepped phase shift power supply are opened, and the second fast switch 12, the first transfer switch 43 and the fourth transfer switch 48 of the stepped phase shift power supply are closed. Neutral zone 3 then receives a second intermediate voltage supply. The phase of the second intermediate voltage is between the voltages of the two power supply arms and is adjacent to the voltage of the second power supply arm 2;
4) the second fast switch 12 is kept closed, the first transfer switch 43 and the fourth transfer switch 48 of the stepped phase shift power supply are opened, the second transfer switch 44 of the stepped phase shift power supply is closed, and the first fast switch 11 and the third transfer switch 47 of the stepped phase shift power supply are kept open. Neutral zone 3 then gets the second supply arm voltage supply.
Step phase-shift power supply topology circuit implementation case two
In the second embodiment, the staged power supply 18 can theoretically generate an intermediate voltage with an infinite number of phases between the voltages of the first and second supply arms, as shown in fig. 3(b) and 3 (d). In this embodiment, the stepped phase shift power supply 18 shown in fig. 3(b) adopts the topology circuit shown in fig. 3(d), and can theoretically output an ac voltage of any phase.
In fig. 3(d), the topology of the present invention for the stepped phase shift power supply 18 includes two input transformers 51, 52, two rectifiers 54, 55, an inverter 56, and an output transformer 53. Wherein the output transformer 53 of the stepped phase shift power supply can be omitted. One end of a high-voltage side winding of a third input transformer 51 of the stepped phase-shift power supply is connected with a contact network of the first power supply arm 1, and the other end of the high-voltage side winding is connected with a steel rail 4; the low side winding of the third input transformer 51 of the stepped phase shift power supply is connected to a first rectifier 54 of the stepped phase shift power supply. One end of a high-voltage side winding of a fourth input transformer 52 of the stepped phase-shift power supply is connected with a contact network of the second power supply arm 2, and the other end of the high-voltage side winding is connected with a steel rail 4; the low side winding of the fourth input transformer 52 of the stepped phase shift power supply is connected to a second rectifier 55 of the stepped phase shift power supply. One end of a high-voltage side winding of an output transformer 53 of the stepped phase-shifting power supply is connected with a common connection point 49 of the stepped phase-shifting power supply and the first and second fast switches, and the other end of the high-voltage side winding is connected with a common connection point 50 of the stepped phase-shifting power supply and the first and second connecting wires; the low-voltage side winding of the output transformer 53 of the stepped phase shift power supply is connected to a stepped phase shift power supply inverter 56. The first rectifier 54 of the stage phase-shifting power supply and the second rectifier 55 of the stage phase-shifting power supply are connected in parallel at the output DC side and are connected with the DC input side of the stage phase-shifting power supply inverter 56. The drive control units of the first rectifier 54, the second rectifier 55 and the inverter 56 of the stepped phase shift power supply are all connected to an intelligent phase splitter control unit (not shown).
The working process of the second embodiment of the stepped phase-shifting power supply 18 of the present invention is as follows:
1) when the first current-receiving pantograph of the train is driven into the neutral zone 3 by the first power supply arm 1, the first fast switch 11 is closed, and the open state of the second fast switch 12 is maintained. Neutral zone 3 then gets the first supply arm voltage supply;
2) when all the pantograph of the train is in the neutral zone 3 and the supply voltage switching of the neutral zone 3 is started, the first fast switch 11 is kept in the closed state and the second fast switch 12 is kept in the open state. A plurality of alternating current single-phase voltages with the amplitude and the phase changing and increasing according to a certain rule are obtained by controlling the stepped phase-shifting power inverter 56 of the second circuit unit. After the alternating-current single-phase voltage is superposed with the voltage of the first power supply arm, the neutral zone 3 can sequentially obtain a plurality of intermediate voltages with gradually increasing or decreasing phases;
3) the first fast switch 11 is opened to the closed state and the second fast switch 12 is closed. The phase of the alternating single-phase voltage output by the stepped phase-shift power inverter 56 is adjusted, so that the voltage of the neutral zone 3 is kept unchanged;
4) keeping the states of the first fast switch 11 and the second fast switch unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases are changed and decreased progressively according to a certain rule by controlling a stepped phase-shifting power inverter 56 of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases are stepped and continuously increased or continuously decreased progressively by the neutral zone 3;
5) keeping the states of the first fast switch 11 and the second fast switch 12 unchanged, when the amplitude of the output ac single-phase voltage of the stepped phase-shift power inverter 56 decreases to zero, the power supply voltage in the neutral region 3 is the second power supply arm voltage.
Step phase-shifting power supply topology circuit implementation case three
The stepped phase-shift power supply in the third embodiment is obtained by combining a stepped phase-shift power supply (hereinafter referred to as a first circuit unit) obtained by combining a transformer winding tap with electronic switches such as thyristors and the like and a stepped phase-shift power supply (hereinafter referred to as a second circuit unit) outputting a single-phase alternating-current voltage by inversion. Theoretically, an intermediate voltage with an infinite number of phases between the first supply arm and the second supply arm voltage can be generated, as shown in fig. 3(c) and 3 (d). In this embodiment, the second circuit unit topology in fig. 3(c) still adopts the structure shown in fig. 3 (d). It is apparent that the device capacity of the second circuit unit of the stepped phase shift power supply 18 in fig. 3(c) is smaller than that of the stepped phase shift power supply 18 in fig. 3 (b). In fig. 3(c), the third embodiment of the topology circuit of the stepped phase-shifting power supply 18 is composed of two parts: the first circuit unit of the stage phase-shifting power supply and the second circuit unit of the stage phase-shifting power supply. The first circuit unit of the stage phase-shifting power supply is the same as the first implementation case of the topology circuit of the stage phase-shifting power supply 18, and the second circuit unit of the stage phase-shifting power supply is the same as the second implementation case of the topology circuit of the stage phase-shifting power supply 18.
Referring to fig. 3(c) and 3(d), the third embodiment of the topology circuit of the stepped phase-shifting power supply 18 of the present invention includes four input transformers 41, 42, 51, 52, one output transformer 53, four transfer switches 43, 44, 47, 48, parallel impedances 45, 46 at two ends of the transfer switches, two rectifiers 54, 55, and one inverter 56. Wherein, the four input transformers 41, 42, 51, 52 can be replaced by two input transformers with double output windings; the output transformer 53 may be omitted.
The working process of the third embodiment of the stepped phase-shifting power supply 18 of the present invention is as follows:
1) when a first current receiving pantograph of the train drives into the neutral zone 3 from the first power supply arm 1, the first fast switch 11 and the first change-over switch 43 of the step phase-shifting power supply are closed, the second fast switch 12 and other change-over switches 44, 47 and 48 of the step phase-shifting power supply are kept in an off state, the output voltage of the second circuit unit is kept to be zero, and the neutral zone 3 obtains the voltage power supply of the first power supply arm;
2) when all current-receiving pantographs of the train are in the neutral zone 3 and the power supply voltage switching of the neutral zone 3 is started, the states of the switches of the first circuit unit of the stepped phase-shift power supply are kept unchanged, and a plurality of alternating-current single-phase voltages with the amplitude and the phase changing and increasing progressively according to a certain rule are obtained by controlling the stepped phase-shift power supply inverter 56 of the second circuit unit. After the single-phase voltage is superposed with the voltage of the first power supply arm, the neutral zone 3 can sequentially obtain a plurality of intermediate voltages with gradually increasing or decreasing phases;
3) the first fast switch 11 is kept in a closed state, the first change-over switch 43 of the stepped phase shift power supply is opened, the second change-over switch 44 and the third change-over switch 47 of the stepped phase shift power supply are closed, and the second fast switch 12 and the fourth change-over switch 48 of the stepped phase shift power supply are kept in an opened state. Meanwhile, the phase of the output alternating single-phase voltage of the stepped phase-shifting power supply inverter 56 of the second circuit unit is adjusted, so that the voltage of the neutral zone 3 is kept unchanged;
4) keeping the states of the switches of the first circuit unit of the multistage phase-shifting power supply unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases are changed and decreased progressively according to a certain rule by controlling the inverter 56 of the multistage phase-shifting power supply of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases are continuously increased progressively or continuously decreased progressively by the neutral zone 3;
5) when the amplitude of the output alternating current single-phase voltage of the inverter 56 of the stepped phase-shift power supply of the second circuit unit is decreased to zero, the power supply voltage of the neutral region 3 is the first intermediate voltage of the first circuit unit of the stepped phase-shift power supply;
6) keeping the states of the switches of the first circuit unit of the multistage phase-shifting power supply unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases change progressively according to a certain rule by controlling the inverter 56 of the multistage phase-shifting power supply of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases continuously increase progressively or continuously decrease progressively by the neutral zone 3;
7) the first fast switch 11, the second transfer switch 44 and the third transfer switch 47 of the stepped phase shift power supply are opened, and the second fast switch 12, the first transfer switch 43 and the fourth transfer switch 48 of the stepped phase shift power supply are closed. Meanwhile, the phase of the ac single-phase voltage output by the stepped phase-shift power inverter 56 of the second circuit unit is adjusted so that the voltage of the neutral region 3 remains unchanged;
8) keeping the states of the switches of the first circuit unit of the multistage phase-shifting power supply unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases are changed and decreased progressively according to a certain rule by controlling the inverter 56 of the multistage phase-shifting power supply of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases are continuously increased progressively or continuously decreased progressively by the neutral zone 3;
9) when the amplitude of the output alternating current single-phase voltage of the inverter 56 of the stepped phase-shift power supply of the second circuit unit is decreased to zero, the power supply voltage of the neutral region 3 is the second intermediate voltage of the first circuit unit of the stepped phase-shift power supply;
10) keeping the states of the switches of the first circuit unit of the multistage phase-shifting power supply unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases change progressively according to a certain rule by controlling the inverter 56 of the multistage phase-shifting power supply of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases continuously increase progressively or continuously decrease progressively by the neutral zone 3;
11) the second fast switch 12 is kept in a closed state, the first changeover switch 43 and the fourth changeover switch 48 of the stepped phase shift power supply are opened, the second changeover switch 44 of the stepped phase shift power supply is closed, and the first fast switch 11 and the third changeover switch 47 of the stepped phase shift power supply are kept in an opened state. Meanwhile, the phase of the ac single-phase voltage output by the stepped phase-shift power inverter 56 of the second circuit unit is adjusted so that the voltage of the neutral region 3 remains unchanged;
12) keeping the states of the switches of the first circuit unit of the multistage phase-shifting power supply unchanged, obtaining a plurality of alternating-current single-phase voltages of which the amplitudes and phases are changed and decreased progressively according to a certain rule by controlling the inverter 56 of the multistage phase-shifting power supply of the second circuit unit, and sequentially obtaining a plurality of intermediate voltages of which the phases are continuously increased progressively or continuously decreased progressively by the neutral zone 3;
13) when the amplitude of the output ac single-phase voltage of the stepped phase-shift power inverter 56 of the second circuit unit decreases to zero, the supply voltage of neutral region 3 is the second supply arm voltage.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. The utility model provides an intelligent phase splitter that alternating current electrified railway does not have a power failure which characterized in that: the device comprises a first fast switch (11), a second fast switch (12), a first impedance (13), a second impedance (14), a first arc extinction adjustable power supply (15), a second arc extinction adjustable power supply (16), a stepped phase-shifting power supply (18) and an intelligent phase splitter control unit (8); the first power supply arm (1), the first anchor section joint conversion area (5), the stepped phase-shifting power supply (18), the first fast switch (11), the first impedance (13), the first arc extinction adjustable power supply (15) and the connecting lines form a first fast switch loop; a second power supply arm (2), a second anchor section joint conversion area (6), a stepped phase-shifting power supply (18), a second fast switch (12), a second impedance (14), a second arc extinction adjustable power supply (16) and a plurality of connecting lines form a second fast switch loop; the intelligent phase splitter control unit (8) is connected with the first fast switch (11), the second fast switch (12) and the stepped phase shift power supply (18) at the same time; the uninterrupted intelligent phase splitter enables a train pantograph to pass through a neutral zone (3), and in the process of obtaining the voltage of a first power supply arm (1) from the closing of a first quick switch (11), obtaining the voltage of a second power supply arm (1) from the opening of the first quick switch (11) and the closing of a second quick switch (12), and cutting off the voltage of the second power supply arm (2) from the opening of the second quick switch (12), the uninterrupted power supply of a pantograph (7) of the train is realized when the train drives into the second power supply arm (2) from the first power supply arm (1) through the neutral zone (3), and an electric arc generated when the pantograph (7) passes through a first anchor section joint conversion zone (5) and a second anchor section joint conversion zone (6) is eliminated.
2. The intelligent uninterrupted phase splitter for the alternating current electrified railway as claimed in claim 1, wherein: the circuit also comprises a first connecting lead (9) and a second connecting lead (10), wherein the first connecting lead (9) is positioned in the first quick switch loop, and the second connecting lead (10) is positioned in the second quick switch loop; the first quick switch (11), the second quick switch (12), the first connecting lead (9) and the second connecting lead (10) are all provided with current sensors; voltage sensors are arranged on two sides of the first quick switch (11) and the second quick switch (12); and the current sensor and the voltage sensor are both connected with the intelligent phase splitter control unit (8).
3. The intelligent uninterrupted phase splitter for the alternating current electrified railway as claimed in claim 2, wherein: the first arc extinction adjustable power supply (15) and the second arc extinction adjustable power supply (16) can be replaced by an arc extinction adjustable power supply (17); after replacement, the arc extinction adjustable power supply (17) is arranged between the connecting point of the first connecting wire (9) and the second connecting wire (10) and the stepped phase-shifting power supply (18).
4. The intelligent phase splitter of any one of claims 1 to 3, wherein: identifying the position of a train pantograph (7) before the first quick switch (11) is closed, and judging that the voltage at two ends of the first quick switch (11) is zero or the voltage of the neutral zone (3) suddenly changes by simultaneously contacting a first power supply arm (1) contact net and a neutral zone (3) contact net at a first anchor section joint conversion zone (5) and a second anchor section joint conversion zone (6) by the pantograph (7); the position of a train pantograph (7) switched from a first quick switch (11) to a second quick switch (12) is identified in a neutral zone (3), and the position is judged by the current of a first connecting wire (9) and a second connecting wire (10) connected to the joint of the first quick switch (11) and the second quick switch (12) by the neutral zone (3); the position of the train pantograph (7) before the second quick switch (12) is disconnected is identified, and the judgment is carried out when the current flowing through the second quick switch (12) is zero, or the judgment is carried out when the last pantograph in the train enters a second anchor section joint conversion area (6) so that the voltage at two ends of the second quick switch (12) is zero or the voltage of a neutral zone (3) changes suddenly.
5. The intelligent phase splitter of claim 3, wherein: the first arc extinction adjustable power supply (15) or the replaced arc extinction adjustable power supply (17) is connected in series in the first quick switch loop and can suppress or even eliminate electric arcs between a contact net and a pantograph (7) of the first anchor section joint conversion area (5), and the second arc extinction adjustable power supply (16) or the replaced arc extinction adjustable power supply (17) is connected in series in the second quick switch loop and can suppress or even eliminate electric arcs between the contact net and the pantograph (7) of the second anchor section joint conversion area (6).
6. The intelligent phase splitter of claim 3, wherein: the first arc extinction adjustable power supply (15), the second arc extinction adjustable power supply (16) or the replaced arc extinction adjustable power supply (17) is obtained by isolating and transforming the voltage of a first power supply arm (1) and the voltage of a second power supply arm (2) through a transformer, then rectifying and inverting the isolated and transformed voltages, and connecting the inverted output single-phase alternating-current voltage to a first quick switch loop or a second quick switch loop; or different tap voltages led out after voltage transformation are respectively isolated by the voltage of the first power supply arm (1) and the voltage of the second power supply arm (2), and then the tap voltages are connected into the first fast switch loop or the second fast switch loop after being connected and combined through a thyristor to obtain the voltage of the first power supply arm and the second power supply arm.
7. The intelligent phase splitter of any one of claims 1 to 3, wherein: the stepped phase-shift power supply (18) is characterized in that different tap voltages led out after voltage transformation are respectively isolated by the voltage of a first power supply arm (1) and the voltage of a second power supply arm (2), are connected and combined through a thyristor, and then are connected with the voltage of the first power supply arm (1) through a first quick switch (11) or connected with the voltage of the second power supply arm (2) through a second quick switch (12), so that the neutral region (3) sequentially obtains the voltage of the first power supply arm (1), a plurality of intermediate voltages with gradually increased or decreased phases and the voltage of the second power supply arm (2).
8. The intelligent phase splitter of any one of claims 1 to 3, wherein: the voltage of the first power supply arm (1) and the voltage of the second power supply arm (2) can be isolated by a transformer and transformed, then rectification and inversion are carried out on the stepped phase-shift power supply (18), the inverted output single-phase alternating-current voltage is connected to the voltage of the first power supply arm (1) or the voltage of the second power supply arm (2), and the neutral area (3) can sequentially obtain the voltage of the first power supply arm (1), a plurality of intermediate voltages with gradually increased or decreased phases and the voltage of the second power supply arm (2).
9. The intelligent phase splitter of any one of claims 1 to 3, wherein: the stepped phase-shifting power supply (18) can also be rectified and inverted after the voltage of the first power supply arm (1) and the voltage of the second power supply arm (2) are isolated and transformed by a transformer, the inverted output single-phase alternating-current voltage is sequentially connected to different tap voltages led out after the isolation and transformation and the voltage of the first power supply arm (1), a plurality of intermediate voltages with gradually increased or decreased phases and the voltage of the second power supply arm (2) obtained after the thyristor is combined, so that the intermediate regions (3) sequentially obtain a plurality of intermediate voltages with gradually increased or decreased phases of two adjacent voltages after the voltage of the first power supply arm (1) is obtained and before the voltage of the second power supply arm (2) is obtained.
10. The intelligent uninterrupted phase splitter for alternating current electrified railways as claimed in claim 9, wherein: the quantity of the plurality of intermediate voltages generated by the stepped phase-shifting power supply (18) is related to the phase difference between the voltage of the first power supply arm (1) and the voltage of the second power supply arm (2), and the specific quantity is determined by the following conditions: when the voltage of the neutral zone (3) jumps in a step mode from the voltage of the first power supply arm (1) to the voltage of the second power supply arm (2) through the intermediate voltage, the jump between every two adjacent voltages cannot cause the train to enter a protection working state due to transient fluctuation of current and/or voltage.
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| CN110509821B (en) * | 2019-08-22 | 2021-01-29 | 广州风雨雷科技有限公司 | System and method for monitoring passing of train pantograph and controlling train power supply phase change by electric field |
| CN112109596B (en) * | 2020-09-28 | 2022-09-20 | 湖北赛尼尔机械制造股份有限公司 | Power supply system for electric locomotive |
| CN113103929B (en) * | 2021-03-23 | 2023-05-30 | 北京交通大学 | Composite switch structure applied to railway ground automatic passing neutral section system |
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| JP2000203316A (en) * | 1999-01-11 | 2000-07-25 | Central Japan Railway Co | Feeder switching control device |
| JP5305636B2 (en) * | 2007-10-31 | 2013-10-02 | 東海旅客鉄道株式会社 | Control method for switching on different power supply in switching section of AC electric railway |
| DE102010002694A1 (en) * | 2010-03-09 | 2011-09-15 | Siemens Aktiengesellschaft | System for controlling power source interface of rail vehicle between power supply line sections of electrical traction current system, in electrical railway network, has arc detection module for detecting arcs among contact wires |
| CN101837744A (en) * | 2010-06-02 | 2010-09-22 | 西南交通大学 | Novel method and device for phase separation control of ground surface over-current |
| WO2015188289A1 (en) * | 2014-06-09 | 2015-12-17 | 北京交通大学 | Method of controlling interruption of power supply of auxiliary coil when train passes split phase |
| CN105034856B (en) * | 2015-07-06 | 2017-11-07 | 北京交通大学 | A kind of electric neutral section of attached wires of AC electrified railway intelligence |
| CN106183897B (en) * | 2016-09-23 | 2018-08-10 | 西南交通大学 | A kind of electric railway subregion institute's automatic neutral-section passing system and its control method |
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