JP2008301595A - Reliable auxiliary power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary power supply device that does not require periodical maintenance or inspection and is reliable with respect to operation after a failure occurrence as well. <P>SOLUTION: The auxiliary power supply devices 11, 12 respectively include input-side contactors 31, 32 and output-side contactors 41, 42 and installed in parallel with a load 3. A controller 4 includes two power supply control units 5, 6 and an operation command unit 7 and a control power supply 8 common to them. The power supply control units 5, 6 are respectively constructed of: control command generation units 51, 61 that control the operation of the auxiliary power supply devices 11, 12 and on/off of the contactors 31, 32 and 41, 42; failure information recording units 52, 62 that store failure history when a failure occurs; and operation information recording units 53, 63 that record operation history indicating whether the respective auxiliary power supplies are in operation or on standby. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a highly reliable auxiliary power supply device, and more particularly to a highly reliable auxiliary power supply device configured to supply power from a plurality of auxiliary power supply devices having a standby redundancy function for the same load.

  Generally, a railway vehicle is supplied with power for driving a main motor by an overhead wire. In recent years, a VVVF inverter control type induction motor that converts DC to AC and changes voltage and frequency is used as a main motor of a railway vehicle. The power source from the overhead line includes a high-voltage single-phase AC power source represented by a Shinkansen train and a DC voltage power source such as a conventional train. Hereinafter, the AC power train is referred to as an AC vehicle, and the DC power train is referred to as a DC vehicle.

  In an AC vehicle train drive system, a high-voltage AC power supply voltage is stepped down by a transformer, converted into a DC voltage by an AC / DC converter, and used as a DC voltage input of a VVVF inverter. On the other hand, in a DC vehicle, the DC power supply voltage is directly used as the DC voltage input of the VVVF inverter. In addition, the electric vehicle includes a control device for controlling the AC / DC converter and the VVVF inverter, a charging device for charging the vehicle-mounted battery, and an auxiliary power supply device for supplying low-voltage power to an air conditioner. It has been.

  Since the above-described auxiliary power supply device for a train drive system controls power supply to an AC / DC converter, a VVVF inverter, a vehicle control device, etc., high reliability is required. For example, if a certain auxiliary power supply device fails, an AC / DC converter or a VVVF inverter to which control power is supplied from the auxiliary power supply device does not operate. Therefore, the vehicle driven by these cannot run on its own, or the vehicle sequence circuit to which AC 100 V power is supplied becomes inoperable, resulting in a train stop accident.

  For these reasons, a high reliability is conventionally required for the auxiliary power supply device, and a power supply system using a plurality of auxiliary power supply devices is configured to increase the reliability of the power supply system that forms the trained vehicle. It was. In addition, as a method for guaranteeing the reliability of a power supply system composed of a plurality of auxiliary power supply devices, an extended power supply method, a parallel power supply method, a standby power supply method, etc. are adopted in accordance with the applied train drive system. Yes.

  The extended power supply method is to switch to a healthy power supply for the load that the faulty power supply is responsible for by disconnecting the faulty power supply and inserting an extension power supply contactor when any one of the multiple auxiliary power supplies fails. Power supply. This extended power supply system corresponds to the “parallel redundancy system” as a system for guaranteeing reliability. In parallel power supply, multiple auxiliary power supplies are connected in parallel during normal operation, supplying power to each determined load, and when one of them fails, the failure power supply is disconnected, This is a method of supplying power by switching to the remaining healthy power supply device for the load that is handled. This parallel power supply method is also equivalent to a “parallel redundancy method” as a reliability guarantee method.

  On the other hand, the standby power supply system is equipped with a power supply device (standby device) that is different from the auxiliary power supply device (operating device) that operates constantly, and when the device in operation fails, the failed power supply is disconnected and the standby power supply system In this method, power is supplied to the load handled by the failed power supply instead of the middle device. This standby power supply method corresponds to a “standby redundant system” as a reliability guarantee method, and the features and problems of application of the standby power supply method as this standby redundant system will be described below. .

  FIG. 5 is a block diagram showing a conventional auxiliary power supply device for a vehicle with a standby power feeding method in a DC electromechanical system. Here, power is supplied to the two auxiliary power supply apparatuses 11 and 12 from the overhead line 10 via the pantograph 1. The two auxiliary power supply apparatuses 11 and 12 include contactors (contactors) 31 and 32 on the input side and contactors 41 and 42 on the output side, and are installed in parallel with respect to one load 3. These auxiliary power supply devices 11 and 12 are interlocked so as not to operate simultaneously, and power is supplied to the load 3 from either of them.

  In the case of an AC machine system, a main transformer is connected to the rear stage of the pantograph 1 and an auxiliary power supply device is connected to the tertiary winding of the main transformer via a contactor. Such a configuration is the same as that of the DC mechanical system described above.

  For example, when the auxiliary power supply 11 that is an operating device stops due to a failure, the auxiliary power supply 11 is disconnected by turning off the contactors 31 and 41 on the input / output side, and is not operating, ie, an auxiliary power supply device. The contactors 32 and 42 on the 12 input / output sides can be switched on to continue the power supply to the load 3. However, although the auxiliary power supply 11 that constantly supplies power to the load 3 is in a pressurized state during operation, the standby device is in a state where the power supply voltage is not pressurized by the contactor 32 on the power supply side (that is, the input side). . Therefore, the reliability items related to the electrical usage conditions during long-time operation, that is, the initial failure period, the stress of the parts used, the life of the parts that require maintenance (electrolytic capacitors, fans, etc.), etc. Since there is a difference in the reliability of the auxiliary power supply devices 11 and 12, measures such as periodic inspections and energization tests of the auxiliary power supply devices 11 and 12 are necessary to guarantee the reliability of the standby devices. Become.

Patent Document 1 to be described later shows an electric vehicle control device that can realize a constant voltage and constant frequency inverter with high redundancy in a configuration with a small number of parts with respect to the configuration of two groups of inverters. In this electric vehicle control device, when the operating device fails, the operating device can be immediately disconnected and switched to the standby auxiliary power supply device, and power supply to the same load can be continued. However, when the electric vehicle control device that has been switched once due to the occurrence of a failure is turned off and the system is stopped, for example, the next day it is activated, it is necessary not to activate the failed auxiliary power supply device.
JP 2005-33885 A

  As described above, in the standby redundant type auxiliary power supply, the standby auxiliary power supply is in a non-pressurized state during normal operation. , Had to take measures such as energization. In addition, the auxiliary power supply that has been switched due to a failure must not be selected at the next system startup, and if a device that has failed is started by mistake, a similar failure will occur again, resulting in device damage, etc. There was a problem that the possibility of worsening the situation was high.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an auxiliary power supply device that does not require regular maintenance and inspection and that has high reliability in operation after occurrence of a failure.

  In the present invention, in order to solve the above problem, in the highly reliable auxiliary power supply device configured to supply power from a plurality of auxiliary power supply devices having a standby redundancy function to the same load, First storage means for storing an operation history of the power supply apparatus, second storage means for storing a failure history when a failure occurs in each auxiliary power supply apparatus, and information stored in the first and second storage means And a control unit that generates an operation command on the basis of the control command and supplies the operation command to any one of the auxiliary power supply devices to control the auxiliary power supply device.

  According to the highly reliable auxiliary power supply device of the present invention, during normal operation, the auxiliary power device in operation and the auxiliary power device in standby are alternately used based on a predetermined rule. Therefore, it is possible to sequentially check the operation status of a plurality of devices at regular intervals. Further, from a long-term viewpoint, the time difference between the voltages applied to each device does not occur, and the reliability of the components constituting each device becomes equal, so the reliability of a plurality of auxiliary power supply devices also becomes equal. Furthermore, even if one of the auxiliary power supply units fails and the control power supply for driving the control means is turned off, the failure information is retained so that the failed auxiliary unit can be activated at the next startup. The power supply can be prevented from starting.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a standby power supply type vehicle auxiliary power supply device constituted by two auxiliary power supply devices in a DC electromechanical system.

  Electric power is supplied from the overhead line 10 to the two auxiliary power supply devices 11 and 12 through the pantograph 1. These auxiliary power supply apparatuses 11 and 12 include contactors 31 and 32 on the input side and contactors 41 and 42 on the output side, respectively, and are installed in parallel with respect to one load 3. The auxiliary power supply devices 11 and 12 are controlled by the respective power supply control units 5 and 6 to start and stop the auxiliary power supply devices 11 and 12 and turn on and off the contactors 31, 32, 41, and 42.

  The control device 4 includes two power supply control units 5 and 6, and an operation command unit 7 and a control power supply 8 that are common to each. Each power control unit 5, 6 has control command generation units 51, 61 that control the operation of the auxiliary power supply devices 11, 12 and control on / off of the contactors 31, 32, 41, 42. The failure information recording units 52 and 62 (second storage means) to be stored and the operation information recording units 53 and 63 (the first storage unit) that record the operation history of whether each auxiliary power supply device 11 and 12 was operating or on standby. 1 storage means).

  A normal control device also has other functions, but here, only parts related to the present invention are described and described. The operation command unit 7 determines that one of the auxiliary power supply apparatuses 11 and 12 should be operated next time from the failure history and the operation history stored in each of the power control units 5 and 6, A stop command is output. During system operation, power is supplied to the control power supply 8 from the auxiliary power supplies 11 and 12 that are in operation, and power is always supplied to both power control units 5 and 6 from here. Further, the failure information recording units 52 and 62 and the operation information recording units 53 and 63 retain the failure history and the operation history stored therein even when the power to the power control units 5 and 6 is turned off. It is configured.

  In the vehicular auxiliary power supply device configured as described above, an operation command is generated based on the operation rule described below, and one of the auxiliary power supply devices 11 and 12 is activated to supply power to the load 3. Like to do.

  FIG. 2 is an explanatory diagram showing a driving method of the auxiliary power supply device for a vehicle. Here, the information regarding the failure history and the previous operation history is a condition for determining which of the two auxiliary power supply devices 11 and 12 is to be operated, and the operation command unit 7 is based on these information. Thus, either an operation command or a stop command is output to the auxiliary power supply devices 11 and 12.

  For example, if the failure history information is recorded as “normal” for both the auxiliary power supplies 11 and 12, the information recorded as the previous operation history of the auxiliary power supplies 11 and 12 becomes “previous stop”. “Operation command” is output. As a result, since the auxiliary power supply devices 11 and 12 are used alternately, their operation status can be sequentially confirmed. However, if this vehicle auxiliary power supply device is in the initial operation or if any abnormal situation occurs, the previous operation history is “previous stop”, so in that case it is predetermined The auxiliary power supply device 11 is operated.

  In addition, the previous operation history of the auxiliary power supply apparatuses 11 and 12 may be “previous operation” due to some abnormality in the power supply control units 5 and 6. When such information on the previous operation history is recorded, the auxiliary power supply device 11 that is determined in advance is operated. That is, it is determined that the auxiliary power supply device 11 is operated in advance in order to prevent the auxiliary power supply devices 11 and 12 from remaining stopped when the previous driving history information contradicts each other. It is.

  In such a case, the auxiliary power supply device 12 may be set in advance to operate. This is because there is no problem even if the operation history information is incorrect unless both the auxiliary power supply devices 11 and 12 are out of order. Alternatively, the auxiliary power supply device 11 may be operated when both are “previous stop”, and the auxiliary power supply device 12 may be operated when both are “previous operation”.

  When the failure history information of either one of the auxiliary power supply devices 11 and 12 is “failure”, a normal auxiliary power supply device is always selected regardless of the previous operation history information, and the “operation command” is selected. Is output. In addition, when both units are out of order, no “operation command” is issued to either of the auxiliary power supply devices 11 and 12 and a “stop command” is issued.

  By setting such an operation rule in the operation command unit 7, when the two auxiliary power supply devices 11 and 12 are both normal, the auxiliary power supply devices 11 and 12 are provided for each cycle of operation and stop. Are used alternately. Further, when a failure occurs in any one of the auxiliary power supply devices, failure information is retained, so that a device that has not failed can always be started.

  The vehicle auxiliary power supply device described above is composed of only two auxiliary power supply devices. However, even if three or more auxiliary power supply devices are used, the vehicle auxiliary power supply device should be configured similarly. It is possible to achieve the same effect.

Next, a method for storing information related to the previous operation history and the failure history will be described.
In general, the information of the auxiliary power supply devices 11 and 12 is stored in the control device 4. Normally, when the control power supply 8 is turned off, the information stored in the control device 4 is cleared. Here, the information recorded in the failure information recording units 52 and 62 and the operation information recording units 53 and 63 is retained even after the control power supply 8 is turned off.

(1) Storage of Failure History in Failure Information Recording Units 52 and 62 FIG. 3 is a block diagram showing an example of a failure information storage circuit in the auxiliary power supply device. The failure information storage circuit 9 includes a failure detection circuit 91 and a mechanical latch relay 92 that are supplied with power from the control power supply 8, and a reset button 93 that is operated from the outside by maintenance personnel. The reason for using the mechanical latch relay 92 is to mechanically latch the “failure” information when a failure occurs so that the information is retained even when the control power supply 8 is turned off.

  Based on the failure detection information from the failure detection circuit 91, the mechanical latch relay 92 operates, and the failure history is stored here. The state of the mechanical latch relay 92 is maintained even when the control power supply 8 is turned off. When the control power supply 8 is started up next time and the auxiliary power supplies 11 and 12 are started, the failure information is mechanically held, and a failure history can be input to the operation command unit 7. Here, in the case of a failure, the maintenance staff investigates and removes the failed part, and then presses the reset button 93 to clear the “failure” information and replace it with “normal” information.

  As described above, since the failure history of the auxiliary power supply devices 11 and 12 is reliably maintained until the failure state is removed even if the control power supply 8 is turned off, it is possible to always start a device that has not failed. . When the failed part is removed, the “failure” information of the mechanical latch relay 92 is cleared by pressing the reset button 93. Therefore, thereafter, the two auxiliary power supply devices 11 and 12 can be operated alternately according to the operation rule set in the operation command unit 7.

(2) Storage of previous operation history in operation information recording units 53 and 63 Here, the operation information recording units 53 and 63 are battery-backed RAM (Random Access Memory) separately from the control power supply 8 in the control device 4. It is assumed that the previous operation history of the auxiliary power supply devices 11 and 12 is recorded in these RAMs.

FIG. 4 is a flowchart showing a procedure for storing the operation history of the auxiliary power supply apparatus.
First (step S1), it is assumed that the previous operation history is “previous operation” in the auxiliary power supply 11 and “previous stop” in the auxiliary power supply 12. At this time, when the control power supply 8 is turned on, the operation command unit 7 issues a stop command to the auxiliary power supply device 11 and an operation command to the auxiliary power supply device 12 (step S2). As a result, the auxiliary power supply device 12 that has been on standby last time is started, and the auxiliary power supply device 11 that was previously operated is on standby (stopped) (step S3).

  Thereafter, the “previous operation history” information stored in the operation information recording unit 53 of the auxiliary power supply device 11 is rewritten from “previous operation” to “previous stop” when the auxiliary power supply device 12 is actually activated ( Step S4). In the RAM corresponding to the operation information recording unit 53, when the auxiliary power supply device 11 receives the “stop command” from the operation command unit 7, or when the “operation command” is output to the auxiliary power supply device 12. The information of “Previous operation history” may be switched.

  Next, when a stop command is sent from the host device, an off command for the control power supply 8 is output to the auxiliary power supply device 12 (step S5). When the operation of the auxiliary power supply device 12 is stopped (step S6), the “previous operation history” information stored in the operation information recording unit 63 is changed from “previous stop” to “ It is rewritten as “previous operation” (step S7).

  In the vehicle auxiliary power supply apparatus thus stopped, for example, when the control power supply 8 is turned on the next day, when an operation restart command is sent from the host apparatus (step S8), the auxiliary power supply apparatus 11 side RAM respectively Information on the previous operation history is read as “previous stop” and information on “previous operation” is read out from the RAM on the auxiliary power supply 12 side to the operation command section 7 (step S9). Then, the operation command unit 7 issues an operation command to the auxiliary power supply device 11 and a stop command to the auxiliary power supply device 12 (step S10). As a result, the auxiliary power supply device 11 that has been on standby last time is started, and the auxiliary power supply device 12 that was previously operated is on standby (stopped) (step S11).

  In this way, the above-described vehicle auxiliary power supply can be operated by alternately switching the auxiliary power supplies 11 and 12 every time the control power supply 8 is turned on and off. Although the procedure for switching the operation by turning on / off the control power supply 8 has been described here, the operation may be switched according to another control condition.

  Although the auxiliary power supply device applied to the DC electromechanical system has been described above, the auxiliary power supply device applied to the AC electromechanical system can be applied in exactly the same manner.

It is a block diagram which shows the structure of the auxiliary power supply apparatus for vehicles of the standby electric power feeding system comprised by the two auxiliary power supply apparatuses in a direct current electromechanical system. It is explanatory drawing which shows the operating method of the auxiliary power supply device for vehicles. It is a block diagram which shows an example of the failure information storage circuit in an auxiliary power supply device. It is a flowchart which shows the memory | storage procedure of the driving | running history of an auxiliary power supply device. It is a block diagram which shows the auxiliary power unit for vehicles of the conventional standby electric power feeding system in a direct current electromechanical system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pantograph 3 Load 4 Control apparatus 5,6 Power supply control part 7 Operation command part 8 Control power supply 9 Failure information storage circuit 10 Overhead line 11,12 Auxiliary power supply 31,32 Input side contactor 41,42 Output side contactor 51,61 Control command generation unit 52, 62 Fault information recording unit 53, 63 Operation information recording unit 91 Fault detection circuit 92 Mechanical latch relay 93 Reset button

Claims (5)

In a highly reliable auxiliary power supply device configured to supply power from a plurality of auxiliary power supply devices having a standby redundancy function for the same load,
First storage means for storing an operation history of each auxiliary power supply device;
Second storage means for storing a failure history when a failure occurs in each of the auxiliary power supply devices;
Control means for generating an operation command based on the information stored in the first and second storage means, and giving and controlling it to any one of the auxiliary power supply devices;
A highly reliable auxiliary power supply device characterized by comprising:   The first storage means stores the operation information or stop information of the auxiliary power supply device as the operation history in a rewritable manner according to the operation command, and the control power source for driving the control means is turned off. The high-reliability auxiliary power supply device according to claim 1, wherein the high-reliability auxiliary power supply device retains it even after the operation. The control means issues an operation command to the auxiliary power supply device in which stop information is stored as the operation history, and issues a stop command to the auxiliary power supply device in which operation information is stored as the operation history. Giving and controlling each,
Further, when the stop information is stored for two or more auxiliary power supply devices, or when the operation information is stored for all the auxiliary power supply devices, the operation command is given to a predetermined unit. The high-reliability auxiliary power supply device according to claim 2.   The first storage unit is configured to rewrite the operation history of another auxiliary power supply device to the stop information when the operation command is given to any of the auxiliary power supply devices. Item 3. A highly reliable auxiliary power supply device according to Item 2. The second storage means stores the failure history of each of the auxiliary power supply devices, and holds it even after a control power source for driving the control means is turned off,
The high-reliability auxiliary power supply device according to claim 1, wherein the operation command is given to any one of the auxiliary power supply devices that have not failed according to the failure history.

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