JP2010200576A - Power supply method and power supply system for ac-dc dual current electric railcar - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the realization of a power supply system for an AC-DC dual current electric railcar having an efficient circuit configuration. <P>SOLUTION: In the power supply system 100 for the AC-DC dual current electric railcar, DC power supplied from a feeder via a pantograph 3 is applied a DC link portion of a main converter 20 in a DC section. An inverter part 40 forms three-phase AC power and drives a main motor 1. Moreover, a converter part 30 operating in an opposite direction converts DC power applied to a DC link portion into single-phase AC power and outputs a secondary winding 52 of a main transformer 50. The single-phase AC power is supplied to a power supply line L of an auxiliary piece of apparatus 2 through an auxiliary winding 53 of the main transformer 50. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power supply method and the like in a power system for an AC / DC train.

  An alternating-current DC train is known as a train that can travel in both an AC section and a DC section. In general, in AC sections, single-phase AC power collected by a pantograph is stepped down by a main transformer and then converted to DC power by a converter unit, and converted to three-phase AC power by an inverter unit in an AC section. The main motor is driven. Further, in the DC section, the main motor is driven by converting the DC power collected by the pantograph into three-phase AC power by the inverter unit without passing through the main transformer and the converter unit (for example, Patent Document 1). reference).

  In addition to the main circuit for driving the main motor, the train has an auxiliary circuit for driving auxiliary equipment (hereinafter referred to as “auxiliary equipment”) such as an air conditioner, a lighting device, and an air compressor. There is. An auxiliary circuit of an AC / DC train is generally configured to include an auxiliary rectifier corresponding to the converter section of the main circuit and a static inverter section (SIV) corresponding to the inverter section of the main circuit. is there. In this auxiliary circuit, in the AC section, the single-phase AC power stepped down by the auxiliary winding of the main transformer is converted to DC by the auxiliary rectifier, and converted to three-phase AC power by the static inverter unit, and the auxiliary equipment To be supplied. Also, in the DC section, the DC power collected by the pantograph is converted into three-phase AC power by the static inverter unit and supplied to the auxiliary equipment without going through the auxiliary rectifier.

Japanese Patent Laid-Open No. 7-7808

  However, the AC / DC train includes the various devices described above for traveling in the AC section and the DC section, but there are devices that are not used in the DC section. For example, although the converter unit is an expensive device, it was not operated in the DC section. Further, if a large and expensive stationary inverter unit can be eliminated, it is advantageous in terms of the installation space under the floor and the cost. This invention is made | formed in view of this subject, The place made into the objective is to implement | achieve the power supply system for AC / DC trains which has an efficient circuit structure.

The first invention for solving the above problems is:
AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply method for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section and functions as a converter, and in the DC section, operates in the reverse direction to convert the DC power applied to the DC link section into AC power to convert the secondary winding. A converter unit control step that functions as a single-phase inverter that outputs to
In the AC section, the AC power from the feeder is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment, and in the DC section, the secondary winding is supplied from the converter unit by the reverse operation. Auxiliary equipment power supply step for stepping down the AC power output to the line with the auxiliary winding of the main transformer and supplying the power to the power line of the auxiliary equipment;
A power supply method including:

As another invention,
AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply system for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and in the DC section, operates in the reverse direction to convert the DC power applied to the DC link section into AC power to convert the secondary winding. With a converter unit controller that functions as a single-phase inverter that outputs to
The power line of the auxiliary equipment is connected to the auxiliary winding of the main transformer,
In the AC section, AC power from the feeder is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment, and in the DC section, the secondary power is supplied from the converter unit by the reverse operation. AC power output to the winding is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment,
You may comprise the power supply system for AC / DC trains.

  According to the first aspect of the invention, the converter unit operates in the forward direction in the AC section and functions as a converter, but in the DC section, operates in the reverse direction and functions as a single-phase inverter. The DC power of the AC power is converted into AC power and output from the input end to the secondary winding of the main transformer. And in the AC section, the AC power from the feeder is supplied to the power line of the auxiliary equipment via the auxiliary winding of the main transformer, but in the DC section, the input of the converter unit operating in the reverse direction The AC power output from the end to the secondary winding of the main transformer is supplied. Therefore, since the converter unit is used in both the AC section and the DC section, the utilization factor can be improved. In addition, since the AC power is supplied to the power line of the auxiliary equipment in both the AC section and the DC section, the auxiliary equipment of a general AC train that uses AC power as a power source is connected to the AC power. Equipping the train eliminates the need for auxiliary rectifiers and static inverters.

The second invention is
AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply method for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and operates in the reverse direction in the DC section to convert DC power applied to the DC link section to AC power and output it from the input end. A converter unit control step to function as a single-phase inverter;
In the AC section, the AC power output from the auxiliary winding of the main transformer is supplied to the power line of the auxiliary equipment, and in the DC section, the AC power output from the input terminal of the converter unit by the reverse operation. Auxiliary equipment power supply step for supplying power to the auxiliary equipment power line,
A power supply method including:

As another invention,
AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply system for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and operates in the reverse direction in the DC section to convert DC power applied to the DC link section to AC power and output it from the input end. A converter unit controller that functions as a single-phase inverter;
The AC power supplied to the power line of the auxiliary device is switched to AC power output from the auxiliary winding of the main transformer in the AC section, and from the input end of the converter unit by the reverse operation in the DC section. Auxiliary equipment power supply switching unit for switching to the output AC power;
It is good also as comprising the power supply system for alternating current DC trains provided with.

  According to the second aspect of the invention, the converter unit operates in the forward direction in the AC section and functions as a converter, but in the DC section, operates in the reverse direction and functions as a single-phase inverter. The DC power of the AC power is converted into AC power and output from the input end to the secondary winding of the main transformer. Then, in the AC section, the auxiliary power supply line is supplied with AC power from the feeder via the auxiliary winding of the main transformer, but in the DC section, it is input to the converter unit that operates in the reverse direction. AC power output from the end is supplied. Therefore, since the converter unit is used in both the AC section and the DC section, the utilization factor can be improved. In addition, since the AC power is supplied to the power line of the auxiliary equipment in both the AC section and the DC section, the auxiliary equipment of a general AC train that uses AC power as a power source is connected to the AC power. Equipping the train eliminates the need for auxiliary rectifiers and static inverters.

In this case, as a third invention,
In the DC section, the auxiliary device power supply step is a step of supplying AC power output from the input end of the converter unit to the power line of the auxiliary device through an insulating transformer in the reverse operation.
A power supply method may be configured.

  According to the third aspect of the present invention, in the DC section, AC power output from the input end of the converter unit by reverse operation is supplied to the power supply line of the auxiliary device via the insulation transformer. In other words, in the DC section, AC power from the converter section is supplied to the power line of the auxiliary equipment via the insulation transformer without passing through the main transformer, so that the main transformer is caused by the change in the output voltage from the converter section. It is possible to prevent an instantaneous high voltage from being generated in the primary winding of the device.

A fourth invention is a power supply method according to any one of the first to third inventions,
The AC / DC train is composed of a plurality of vehicles including the main conversion device,
In the DC section, the converter unit control step operates in the reverse direction so that the converter unit of each of the main converters operates as the single-phase inverter, and cancels voltage pulsation components generated from the single-phase inverters. Including the step of phase difference operation,
A power supply method may be configured.

  Since the single-phase AC power is supplied to the power line of the auxiliary equipment in both the DC section and the AC section, voltage pulsation occurs in the DC link section of the main converter and the feeders connected to it in the DC section. Can occur. Thus, as in the fourth aspect of the invention, if the AC / DC train is composed of a plurality of vehicles including the main converter, the converter unit of each main converter is operated in the reverse direction as a single-phase inverter in the DC section. At the same time, by operating each single-phase inverter with a phase difference, it is possible to suppress voltage pulsations of the DC link portion of the main converter and the feeders connected thereto.

Further, as a fifth invention, the power supply method according to any one of the first to third inventions,
The AC / DC train is composed of a plurality of vehicles including the main conversion device,
The converter unit control step includes a selection control step of selectively operating any of the converter units of the main converter in a DC section,
The auxiliary device power supply step is a step of supplying AC power generated by the selected and operated converter unit to a power line of the auxiliary device in a DC section.
A power supply method may be configured.

  As a result of using the converter unit even in the DC section, the failure rate of the converter unit can be improved. If the converter unit fails, power cannot be supplied to the inverter unit in the subsequent stage, and the main motor cannot be driven in the AC section, but the main motor of the other vehicle in the train compensates for the insufficient torque. It is possible to run the train at However, since the power supply to the auxiliary device is stopped in the DC section, a situation in which the auxiliary device cannot be operated occurs.

  Therefore, as in the fifth invention, if the AC / DC train is composed of a plurality of vehicles including the main converter, in the DC section, selectively operate any converter unit of the main converter, By supplying the AC power generated by the converter unit to the power line of the auxiliary device, even if the converter unit of one vehicle breaks down, the converter unit of another vehicle can supply power to the auxiliary device. The situation where the auxiliary equipment becomes inoperable can be avoided.

The sixth invention is the power supply method according to any one of the first to third inventions,
A failure detection step of detecting a failure of the converter unit;
When the failure is detected in the DC section, the driving of the main motor by the inverter unit is disconnected, the inverter unit is switched to a single-phase output circuit, and the single-phase AC power output from the inverter unit is supplied to the auxiliary unit. Steps to deal with the converter part failure supplied to the power line of the device,
It is good also as comprising the electric power supply method containing these.

  According to the sixth aspect of the invention, it is possible to avoid a situation where the auxiliary device becomes inoperable due to a failure of the converter unit. That is, when a failure of the converter unit is detected, the drive of the main motor by the inverter unit is disconnected, the inverter unit is switched to a single-phase output circuit, and the single-phase AC power output from the inverter unit is supplied to the power line of the auxiliary device The situation where the auxiliary device becomes inoperable can be avoided by supplying the power to.

An example of the circuit structure of the power supply system for AC / DC trains of 1st Embodiment. An example of the circuit structure of the power supply system for AC / DC trains of 1st Embodiment. A modification of the power supply system for AC / DC trains. A modification of the power supply system for AC / DC trains. A modification of the power supply system for AC / DC trains. An example of the circuit structure of the power supply system for AC / DC trains of 2nd Embodiment. A modification of the power supply system for AC / DC trains. An example of the circuit structure of the power supply system for conventional AC / DC trains. An example of the circuit structure of the power supply system for conventional AC / DC trains.

  Hereinafter, an example of an embodiment suitable for the present invention will be described with reference to the drawings. However, embodiments to which the present invention can be applied are not limited to this.

1. Conventional AC DC Power Supply System Before describing an embodiment to which the present invention is applied, a circuit configuration of a conventional AC DC power supply system will be briefly described. 8 and 9 are diagrams showing a schematic circuit configuration of a conventional AC / DC train power supply system 900. FIG. 8 shows the power supply operation when traveling in the AC section, and FIG. 9 shows the power supply operation when traveling in the DC section.

  The AC train power supply system 900 includes a main transformer 50, a main converter 20, an auxiliary rectifier 910, a static inverter 920, and switch units 61, 95, 96, and 97. It is roughly divided into a main circuit that is a power supply system for driving the electric motor 1 and an auxiliary circuit that is a power supply system for driving auxiliary equipment. The main converter 20 includes a converter unit 30, an inverter unit 40, and a filter capacitor 22 connected in parallel to the input terminal of the inverter unit 40. Although not shown, the AC / DC train power supply system 900 includes various control units and a control device that controls the AC / DC train power supply system 900 in an integrated manner.

  The switch units 61, 95, 96, and 97 have a known switch mechanism that includes a contactor, a high-speed circuit breaker, and the like. The switch unit 61 connects the main transformer 50 to the pantograph 3 in the AC section (FIG. 8) and pantographs the DC ring section between the converter unit 30 and the inverter unit 40 in the DC section (FIG. 9). 3 to be connected. The switch sections 95 and 97 are controlled to open in the AC section (FIG. 8) and closed in the DC section (FIG. 9), and the switch section 96 is closed in the AC section (FIG. 8). In the DC section, the opening operation is controlled (FIG. 9).

  As a whole, in the AC circuit power supply system 900, the main transformer 50 steps down the single-phase AC power supplied from the feeder via the pantograph 3 in the AC section, and reduces the reduced AC power. The converter unit 30 converts to DC power, and the inverter unit 40 generates three-phase AC power to drive the main motor 1. Further, on the auxiliary circuit side, the AC power supplied through the auxiliary winding 53 of the main transformer 50 is converted into DC power by the auxiliary rectifier 910, and further, the static inverter 920 is converted into three-phase AC power to be converted into AC three. The power is supplied to the power line of the phase power auxiliary equipment 9.

  On the other hand, in the DC section, on the main circuit side, the DC power supplied from the feeder via the pantograph 3 is applied to the DC link part of the main converter 20, and the inverter part 40 drives the main motor 1. Generate phase AC power. On the auxiliary circuit side, DC power from the pantograph 3 is applied to the input terminal of the static inverter 920, and the static inverter 920 generates three-phase AC power and supplies it to the power line of the AC three-phase power auxiliary device 9.

  Therefore, in the DC section, converter unit 30 and auxiliary rectifier 910 are in a non-operating state. In addition, the auxiliary circuit of the AC / DC train power supply system 900 is configured to include a static inverter 920 so as to correspond to both the AC section and the DC section, and a relatively large capacity auxiliary device such as an air-conditioning / cooling apparatus is connected to the AC circuit. It was configured as a phase power supply auxiliary device 9. Of course, auxiliary equipment of AC single phase power supply and auxiliary equipment of DC power supply are also mounted, but the power supply for these auxiliary equipment is supplied by an auxiliary transformer or auxiliary rectifier connected to the subsequent stage of the static inverter 920. It was.

2. Next, two embodiments of a power system for an AC / DC train to which the present invention is applied will be described. In the following description, the same components as those of the conventional AC / DC train power supply system 900 are denoted by the same reference numerals, and description thereof is omitted.

2.1 First Embodiment FIGS. 1 and 2 are diagrams illustrating a schematic circuit configuration of a power system 100 for an AC / DC train according to a first embodiment. FIG. 1 shows a power supply operation when traveling in an AC section, and FIG. 2 shows a power supply operation when traveling in a DC section.

  The AC train power supply system 100 includes a control device 10, a main conversion device 20, a main transformer 50, and a switch unit 61. The main difference from the conventional AC / DC train power supply system 900 is that the auxiliary circuit power supply is single-phase alternating current, the auxiliary equipment is AC single-phase power supply auxiliary equipment 2, and the auxiliary rectifier 910 and static inverter 920 are not required. It is a point.

  The switch unit 61 includes a known switch mechanism including a contactor or the like, and the switching operation is controlled by the control device 10. That is, the switch unit 61 connects the main transformer 50 to the pantograph 3 in the AC section (FIG. 1), and pantographs the DC link part between the converter unit 30 and the inverter unit 40 in the DC section (FIG. 2). 3 to be connected.

  The input end of the converter unit 30 is connected to the secondary winding 52 of the main transformer 50, and the output end of the converter unit 30 is connected to the pantograph 3 via the switch unit 61. The converter unit 30 is controlled by the control device 10 so as to function as a PWM converter by forward operation in the AC section and to function as a single-phase inverter by reverse operation in the DC section. That is, the converter unit 30 functions as a PWM converter in the AC section, thereby converting single-phase AC power from the secondary winding 52 of the main transformer 50 into DC power and outputting it, and in the DC section. The DC voltage applied to the DC link portion from the feeder via the pantograph 3 is converted into a single-phase AC and output from the input end.

  The overall circuit operation of the AC / DC train power supply system 100 is as follows. That is, in the AC section, as shown in FIG. 1, the main transformer 50 steps down the single-phase AC power supplied from the feeder via the pantograph 3, and the converter unit 30 converts the stepped-down AC power into DC power. Then, the inverter unit 40 generates three-phase AC power to drive the main motor 1. Further, single-phase AC power supplied to the main transformer 50 is supplied to the power line L of the auxiliary device 2 through the auxiliary winding 53.

  On the other hand, in the DC section, as shown in FIG. 2, the DC power supplied from the feeder via the pantograph 3 is applied to the DC link unit of the main converter 20, and the inverter unit 40 generates three-phase AC power. The main motor 1 is driven. Further, the DC power applied to the DC link unit is converted into single-phase AC power by the converter unit 30 operated in the reverse direction under the control of the control device 10 and output to the secondary winding 52 of the main transformer 50, This single-phase AC power is supplied to the power supply line L of the auxiliary device 2 through the auxiliary winding 53 of the main transformer 50.

  Therefore, the converter unit 30 is used in both the AC section and the DC section. In addition, single-phase AC power is supplied to the power supply line L of the auxiliary equipment regardless of whether it is an AC section or a DC section. For this reason, the AC power auxiliary device 2 can be configured by auxiliary devices for a general AC train that uses single-phase AC power as a power source. Therefore, an auxiliary circuit that does not require a static inverter can be realized.

2.2 Modified Example of First Embodiment (1) Voltage Pulsation In addition, in the AC train power supply system 100 of the present embodiment, since single-phase AC power is supplied as a power source for the auxiliary circuit, Pulsation occurs in the voltage of the feeder connected to this, which may adversely affect the control of the main circuit, the feeder facility, the track circuit facility, and the like. Although a certain amount of voltage pulsation can be suppressed by selecting the capacity of the filter capacitor 22, it may be configured as follows in order to suppress it more reliably.

(1A)
For example, as shown in FIG. 3, an AC / DC train power supply system 100 </ b> A that operates a phase difference between converter units between different units is configured. The figure shows the power supply operation in the DC section.

  In this case, the AC train power supply system 100A is provided in each of the plurality of units Y (Y1, Y2) in the train. Then, in the DC section, the operation is controlled by the control device 10 so that the phase difference of the single-phase AC power output from the converter units 30 of different units becomes a predetermined phase. Specifically, this phase difference is 90 degrees in the case of 2 units as shown in the figure, and 60 degrees in the case of 3 units.

  This is because the voltage pulsation generated in the AC power supply system 100A of each unit is offset between different units. That is, although the magnitude of the voltage pulsation of the DC link portion is proportional to the magnitude of the supplied power, the supply power to the auxiliary equipment of each unit is substantially the same, so the voltage pulsation generated from each converter unit 30 of each unit. Are substantially equal in amplitude. Further, since the frequency of the voltage pulsation depends on the frequency of the power supplied from the auxiliary power supply, the frequency of the voltage pulsation becomes equal by making the frequency of the supplied power equal. Then, by adding a phase difference to the single-phase AC power output from the converter unit 30 of each unit Y, it is possible to add a phase difference to the single-phase AC power supplied to the power line L of the auxiliary device through the auxiliary winding 53. This is because it can.

(2) Failure of converter unit 40 In addition, in the AC train power supply system 100 of the present embodiment, the converter unit 30 is always in operation, and therefore, compared to the conventional AC train power supply system 900. Failure rate may be improved. When the converter unit 30 breaks down, power for driving the main motor 1 cannot be supplied in the AC section, but the train can run because the other M cars in the train make up for the insufficient torque. It is. However, in the direct current section, power cannot be supplied to the power supply line L of the auxiliary device, so that the auxiliary device cannot operate. Therefore, in order to avoid inoperability of the auxiliary device due to the failure of the converter unit, the following configuration may be adopted.

(2A)
For example, as shown in FIG. 4, an AC / DC train power supply system 100 </ b> D that uses another converter unit 30 in the train is configured. The figure shows the power supply operation in the DC section.

  This AC / DC train power supply system 100D is an embodiment in which one unit is constituted by a plurality of M cars (in the figure, two cars M1, M2). In each M car, the input end of the converter unit 30 is connected to the secondary winding 52 of the main transformer 50 via the switch units 63 and 64.

  Less power is supplied to the auxiliary circuit than the main circuit. For this reason, in the DC section, single-phase power can be supplied in parallel by a plurality of converters 30, or power can be supplied by only one converter 30. The switch units 63 and 64 are controlled to be opened and closed by the control device 10. For example, when power is supplied only by the converter 30 of the M1 vehicle in the DC section, the switch unit 63 is closed and the switch unit 64 is opened in the DC section. When the converter section 30 of the M1 car fails in the DC section, the switch section 63 is opened, and the converter section 30 of the M1 car and the secondary winding 52-1 of the main transformer 50 are disconnected. At the same time, the control device 10 causes the converter unit 30 of the M2 vehicle to operate in the reverse direction to function as a single-phase inverter. Then, the switch unit 64 is closed to connect the converter unit 30 of the M2 vehicle and the secondary winding 52-2. As a result, the single-phase AC power from the converter unit 30 of the other M cars (M2 cars) in the train is supplied to the power line L of the auxiliary device 2 through the auxiliary winding 53 of the common main transformer 50. Further, when power is supplied in parallel by the converter unit 30 of the M1 car and the M2 car, when the converter unit 30 of the M1 car breaks down, the control device 10 opens the switch unit 63, and the M2 car By changing the operating state of the converter unit 30, the single-phase AC power is supplied to the power line L of the auxiliary device 2 through the auxiliary winding 53 of the common main transformer 50.

  By configuring like the AC power supply system 100D, even if the converter part of one vehicle fails in the DC section, the auxiliary part operates because the converter part of the other vehicle is backed up. The situation that becomes impossible can be avoided.

(2B)
Moreover, as shown in FIG. 5, when the main converter is constituted by one converter unit 30 and a plurality of inverter units 40 (40-1, 40-2...), There is 1 It is good also as comprising the power supply system 100E for AC trains using the inverter part 40 of a stand | base as a single phase inverter. In the figure, the power supply operation in the DC section is shown.

  In the example of FIG. 5, in the AC train power supply system 100E, the inverter units 40-1 and 40-2 supply power to the two main motors 1-1 and 1-2, respectively. Of the two inverter units 40, each of the three-phase output terminals of one inverter unit 40-1 is connected to the main motor 1-1 to be driven via the switch units 65, 66, and 67.

  The switch units 65, 66, and 67 are controlled to be opened and closed and switched by the control device 10. That is, at the normal time, the switch units 65, 66, and 67 are controlled so as to connect the output terminal of the inverter unit 40-1 to the main motor 1-1.

  When the converter unit 30 fails in the DC section, the switch units 65 and 66 are switched so that two output ends of the three-phase outputs of the inverter unit 40-1 are connected to the input ends of the converter unit 30, and The switch unit 67 is opened to disconnect the inverter unit 40-1 and the main motor 1-1. That is, the main motor 1-1 is excluded from the drive target, and the drive wheels of the main motor 1-1 are slave wheels. As a result, single-phase AC power from the inverter unit 40-1 functioning as a single-phase inverter is supplied to the secondary winding 52 and supplied to the power supply line L of the auxiliary device 2 through the auxiliary winding 53.

2.3 Second Embodiment FIG. 6 is a diagram illustrating a schematic circuit configuration of a power system 200 for an AC / DC train according to a second embodiment, and illustrates a power supply operation when traveling in a DC section.

  The AC train power supply system 200 includes a control device 10, a main conversion device 20, a main transformer 50, switch units 61, 91, 92, 93, and an insulating transformer 80. The difference from the AC DC power supply system 100 in the first embodiment described above is that an insulating transformer 80 is provided between the input end of the converter unit 30 and the power supply line L of the auxiliary device 2. In the AC train power supply system 100 of the first embodiment, AC power is supplied from the input end of the converter unit 30 to the secondary winding 52 of the main transformer 50 when the converter unit 30 is operated in the reverse direction in the DC section. As a result, a high voltage can be generated in the primary winding 51 of the main transformer 50. Therefore, in the AC train power supply system 200 of the second embodiment, the input end of the converter unit 30 and the power supply line L of the auxiliary device 2 are connected via the insulating transformer 80 in the DC section.

  The isolation transformer 80 has a primary side connected to the input end of the converter unit 30 via the switch unit 93 and a secondary side connected to the power supply line L of the auxiliary device 2.

  Further, the input end of the converter unit 30 is connected to the secondary winding 52 of the main transformer 50 via the switch unit 91, and the auxiliary winding 53 of the main transformer 50 is connected to the power line L via the switch unit 92. It is connected to the. The switch units 91, 92, 93 are controlled to be opened / closed or switched by the control device 10.

  The circuit operation of the AC / DC train power supply system 200 is as follows. That is, in the AC section, the switch unit 61 is switched so as to connect the main transformer 50 to the pantograph 3. Further, the switch portions 91 and 92 are closed, and the switch portion 93 is opened. That is, as with the AC / DC train power supply system 100 in the first embodiment, single-phase AC power from the feeder via the pantograph 3 is supplied to the main transformer 50, and the converter unit 30 converts it to DC power. The inverter unit 40 generates three-phase AC power to drive the main motor 1, and single-phase AC power is supplied to the power supply line L of the auxiliary device through the auxiliary winding 53.

  On the other hand, in the DC section, as shown in FIG. 6, the switch unit 61 is switched to connect the DC link unit to the pantograph 3. In addition, the switch portions 91 and 92 are opened, and the switch portion 93 is closed. Accordingly, the single-phase AC power output from the input end of the converter unit 30 that operates in the reverse direction and functions as a single-phase inverter is supplied to the primary side of the isolation transformer 80, and the single-phase generated on the secondary side of the isolation transformer 80 AC power is supplied to the power supply line L of the auxiliary device 2.

2.4 Modification of Second Embodiment (1) Failure of Converter Unit 40 In the AC / DC train power supply system 200 of this embodiment, the converter unit is the same as the AC / DC train power supply system 100 of the first embodiment. Since 30 is always in operation, the failure rate may be improved as compared with the conventional AC / DC power supply system 900. Therefore, in order to avoid inoperability of the auxiliary equipment due to the failure of the converter unit, the AC / DC train power supply system 200 may be configured as follows.

  For example, as shown in FIG. 7, an AC / DC train power supply system 200 </ b> A that uses another converter unit 30 in the train is configured. The figure shows the power supply operation in the DC section.

  This AC / DC train power supply system 200A is an embodiment in which one unit is configured by a plurality of M cars. Further, the secondary side of the insulating transformer 80 is connected to the power line L of the auxiliary equipment via the switch portions 94-1 and 94-2.

  The switch units 94-1 and 94-2 are controlled to be opened and closed by the control device 10. That is, the switch units 94-1 and 94-2 are controlled to open in the AC section, and in the DC section, the switch unit corresponding to the converter unit 30 operating in the reverse direction is selectively closed. To be controlled. For example, in the DC section, when the converter unit 30 of the M1 vehicle is operating in the reverse direction, the switch unit 94-1 is controlled to be closed and the switch unit 94-2 is controlled to be opened. . For example, when it is detected that the converter unit 30 of the M1 vehicle has failed, the switch unit 94-1 is opened, the operation of the converter unit 30 of the M1 vehicle is stopped, and the converter unit 30 of the M2 vehicle is operated in the reverse direction. To be operated. Then, the switch unit 94-2 corresponding to the converter unit 30 of the M2 vehicle is closed, and the AC power output from the converter unit 30 of the M2 vehicle is supplied to the power line of the auxiliary device 2 via the insulation transformer 80 of the M2 vehicle. L is supplied.

  In the DC section, both the switch units 94-1 and 94-2 may be closed, and the converter units 30 of both the M1 and M2 vehicles may be operated in the reverse direction and operated in parallel.

  By comprising in this way, even if it is a case where the converter part of one vehicle fails, the situation where an auxiliary | assistant apparatus becomes inoperable can be avoided.

100, 200 AC DC power supply system 10 Controller 20 Main converter, 30 Converter unit, 40 Inverter unit 50 Main transformer, 51 Primary winding, 52 Secondary winding, 53 Auxiliary winding 61-69, 91, 92 Switch unit 80 Insulation transformer 1 Main motor 2 AC single-phase power auxiliary equipment, L Power line 3 Pantograph 4 Ground

Claims (8)

AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply method for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and in the DC section, operates in the reverse direction to convert the DC power applied to the DC link section into AC power to convert the secondary winding. A converter unit control step that functions as a single-phase inverter that outputs to
In the AC section, the AC power from the feeder is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment, and in the DC section, the secondary winding is supplied from the converter unit by the reverse operation. Auxiliary equipment power supply step for stepping down the AC power output to the line with the auxiliary winding of the main transformer and supplying the power to the power line of the auxiliary equipment;
Power supply method including. AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply method for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and operates in the reverse direction in the DC section to convert DC power applied to the DC link section to AC power and output it from the input end. A converter unit control step to function as a single-phase inverter;
In the AC section, the AC power output from the auxiliary winding of the main transformer is supplied to the power line of the auxiliary equipment, and in the DC section, the AC power output from the input terminal of the converter unit by the reverse operation. Auxiliary equipment power supply step for supplying power to the auxiliary equipment power line,
Power supply method including. In the DC section, the auxiliary device power supply step is a step of supplying AC power output from the input end of the converter unit to the power line of the auxiliary device through an insulating transformer in the reverse operation.
The power supply method according to claim 2. The AC / DC train is composed of a plurality of vehicles including the main conversion device,
In the DC section, the converter unit control step operates in the reverse direction so that the converter unit of each of the main converters operates as the single-phase inverter, and cancels voltage pulsation components generated from the single-phase inverters. Including the step of phase difference operation,
The power supply method according to claim 1. The AC / DC train is composed of a plurality of vehicles including the main conversion device,
The converter unit control step includes a selection control step of selectively operating any of the converter units of the main converter in a DC section,
The auxiliary device power supply step is a step of supplying AC power generated by the selected and operated converter unit to a power line of the auxiliary device in a DC section.
The power supply method according to claim 1. A failure detection step of detecting a failure of the converter unit;
When the failure is detected in the DC section, the driving of the main motor by the inverter unit is disconnected, the inverter unit is switched to a single-phase output circuit, and the single-phase AC power output from the inverter unit is supplied to the auxiliary unit. Steps to deal with the converter part failure supplied to the power line of the device,
The electric power supply method as described in any one of Claims 1-3 containing these. AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply system for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section and functions as a converter, and in the DC section, operates in the reverse direction to convert the DC power applied to the DC link section into AC power to convert the secondary winding. With a converter unit controller that functions as a single-phase inverter that outputs to
The power line of the auxiliary equipment is connected to the auxiliary winding of the main transformer,
In the AC section, AC power from the feeder is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment, and in the DC section, the secondary power is supplied from the converter unit by the reverse operation. AC power output to the winding is stepped down by the auxiliary winding of the main transformer and supplied to the power line of the auxiliary equipment,
Power supply system for AC / DC trains. AC power from the feeder in the AC section is applied to the main transformer, and the main motor is driven through the main converter having the converter unit and the inverter unit connected to the secondary winding of the main transformer, In the DC section, a DC power supply system for driving the main motor by applying DC power from the feeder to the DC link portion of the main converter,
The converter unit operates in the forward direction in the AC section to function as a converter, and operates in the reverse direction in the DC section to convert DC power applied to the DC link section to AC power and output it from the input end. A converter unit controller that functions as a single-phase inverter;
The AC power supplied to the power line of the auxiliary device is switched to AC power output from the auxiliary winding of the main transformer in the AC section, and from the input end of the converter unit by the reverse operation in the DC section. Auxiliary equipment power supply switching unit for switching to the output AC power;
Power supply system for AC trains equipped with

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