CN106787663A - A kind of EMUs AuCT parallel connection startup method - Google Patents

Abstract

A kind of EMUs AuCT parallel connection startup method, it is characterised in that when automobile auxiliary current transformer carries out grid-connected startup, first randomly selecting one has the AuCT of exchange output request as first startup；The current transformer of the first startup to choosing sends exchange output and allows instruction；Simultaneously other all AuCTs are sent with No starting instruction, it is ensured that an only AuCT is in start-up course in vehicle；Remarkable result of the invention：First, AuCT is in parallel to be started by software control, and train does not need unnecessary distribution or increase equipment；Second, AuCT parallel connection startup method restarts other all AuCTs first to start one, had both avoided the output simultaneously of several auxiliary and has caused the inconsistent risk of phase, and has reduced the time that accessory system starts as far as possible.

Description

A kind of EMUs AuCT parallel connection startup method

Technical field

The invention belongs to railway transport field, and in particular to a kind of EMUs AuCT parallel connection startup method.

Background technology

With developing rapidly for high ferro cause, EMUs have become one of important vehicles.And once run When EMUs break down, the late and passenger that will cause whole piece working line is detained, and mainly constitutes it as EMUs One AuCT can reliability service, the moment affect EMUs stabilization and degree of passenger comfort impression.

One row EMUs typically set many AuCTs to load supplying is pressed in vehicle, and bus is pressed in existing EMUs Constituted mode mainly have two kinds, the first asks the output isolation of each AuCT in the absence of AuCT parallel connection Topic, but this scheme needs to set a large amount of medium voltage contactors, takes big quantity space, and increase complete vehicle weight and load management Complexity, therefore most of vehicle does not all use this kind of bus mode；Second method is that bus is pressed in setting through full row, auxiliary Current transformer Parallel opertation is helped, this requires that the phase of all AuCT outputs must be consistent with phase sequence, in otherwise causing Pressure busbar short-circuit, failure.

The Starting mode in parallel of current AuCT mainly has two kinds, and a kind of is by setting through full row " together The hard signal of startup ", it is ensured that all auxiliary are according to identical phase output, but the program increased the wiring of car body；Second The method of kind is each AuCT random start in parallel, and the voltage and phase on bus are first detected before every AuCT output Position, it is then synchronous consistent after export again, but once several auxiliary be detected simultaneously by bus there is no voltage and while when exporting, just There is phase and the inconsistent risk of sequential.

The content of the invention

It is simple it is an object of the invention to provide a kind of scheme, the safe and reliable AuCT method for starting in parallel.

To achieve the above object, the present invention provides a kind of EMUs AuCT parallel connection startup method, it is characterised in that Comprise the following steps：

1）When automobile auxiliary current transformer carries out grid-connected startup, an AuCT for having exchange output request is first randomly selected As first startup；

2）Sending exchange output to the current current transformer as first startup chosen allows instruction；Simultaneously to other all auxiliary Current transformer sends No starting instruction, it is ensured that an only AuCT is in start-up course in vehicle；

3）First AuCT is received after startup allows instruction, is started, if first AuCT is complete in nS Into startup, and alternating current is pressed in output on middle pressure bus, then it is assumed that the assistant starting is completed；

4）After first AuCT normal start completion, while being sent to other all AuCTs for thering is output to ask Exchange output allows instruction, and other AuCTs are received after allowing instruction, the phase and frequency of the alternating current on detection bus Rate, output is synchronized with first same phase, completes the grid-connected startup of AuCT；

5）If within the nS times of regulation, first AuCT does not complete to start due to failure cause, then cancel this auxiliary The exchange output for helping allows instruction, and one is randomly selected again as first in other have the AuCT of exchange output request Start, by that analogy.

Advantages and positive effects of the present invention：

（1）This EMUs AuCT is in parallel to be started by software control, and train does not need unnecessary distribution or increase equipment.

（2）This EMUs AuCT parallel connection startup method restarts other all auxiliary converters first to start one Device, had both avoided the output simultaneously of several auxiliary and had caused the inconsistent risk of phase, and reduced what accessory system started as far as possible Time.

Brief description of the drawings

Fig. 1 is AuCT parallel connection Booting sequence schematic diagram.

Specific embodiment

Refering to Fig. 1, EMUs AuCT parallel connection startup method is as follows：

1）When AuCT can normally carry out exchange output, output request is sent.Randomly selecting any one has exchange The AuCT of request is exported as first startup, into grid-connected startup sequential；

2）To 1）The current transformer as first startup of middle selection sends exchange output and allows instruction；

3）Simultaneously other all AuCTs are sent with No starting instruction, it is ensured that only have an AuCT to exist in vehicle In start-up course；

4）First AuCT is received after exchange output allows instruction, is started in nS.

5）If first AuCT completes to start in nS, and presses alternating current in output, then it is assumed that the auxiliary is normal Start completion；If AuCT presses alternating current in not exported due to failure and other reasons at the appointed time, then it is assumed that should AuCT starts failure；

6）If first AuCT completes to start in nS, simultaneously to other all AuCTs for thering is output to ask Sending exchange output allows instruction.

7）Other AuCTs receive exchange output allow instruction after, with first auxiliary identical phase carry out together Step output, completes the grid-connected startup of AuCT.

8）If at the appointed time（nS）First AuCT does not complete to start, then the exchange for cancelling the auxiliary is defeated Go out instruction.

9）One is randomly selected again in other have the AuCT of exchange output request, repeats 2）To 9）Sequential, with This analogizes.

Claims (1)

1. a kind of EMUs AuCT parallel connection startup method, it is characterised in that comprise the following steps：

1）When automobile auxiliary current transformer carries out grid-connected startup, an AuCT for having exchange output request is first randomly selected As first startup；

2）Sending exchange output to the current current transformer as first startup chosen allows instruction；Simultaneously to other all auxiliary Current transformer sends No starting instruction, it is ensured that an only AuCT is in start-up course in vehicle；

3）First AuCT is received after startup allows instruction, is started, if first AuCT is complete in nS Into startup, and alternating current is pressed in output on middle pressure bus, then it is assumed that the assistant starting is completed；

4）After first AuCT normal start completion, while being sent to other all AuCTs for thering is output to ask Exchange output allows instruction, and other AuCTs are received after allowing instruction, the phase and frequency of the alternating current on detection bus Rate, output is synchronized with first same phase, completes the grid-connected startup of AuCT；

5）If within the nS times of regulation, first AuCT does not complete to start due to failure cause, then cancel this auxiliary The exchange output for helping allows instruction, and one is randomly selected again as first in other have the AuCT of exchange output request Start, by that analogy.