Auxiliary power conversion system for train and its control method and train
An auxiliary power supply and conversion system technology, applied in the direction of adjusting electric variables, converting irreversible DC power input into AC power output, control/regulation systems, etc., can solve problems such as vehicle tripping and affecting train operation, and improve safety Effects of Sex and Reliability
Active Publication Date: 2020-11-20
BYD CO LTD
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[0004] However, for the above-mentioned work flow, there is a risk of tripping the whole vehicle due to an internal failure of the auxiliary power conversion system. The high-voltage source is short-circuited, and the large current generated by the short-circuit may cause the entire train to trip and affect the operation of the entire train; and if the sub-module is short-circuited (output short-circuit, drive through, etc.), under this working condition, when the contactor pulls in successfully After the rear sub-module starts to work, it will also generate a large current, which may cause the whole vehicle to trip
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[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0035] The following describes the control method of the auxiliary power conversion system of the train, the non-transitory computer readable storage medium, the auxiliary power conversion system of the train and the train proposed by the embodiments of the present invention with reference to the accompanying drawings.
[0036] figure 1 It is a flow chart of the control method of the auxiliary power conversion system of the train according to one embodiment of the present invention. Among them, such as figure 2 As shown, the a...
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The invention discloses an auxiliary power conversion system of a train, a control method of the auxiliary power conversion system and the train. The auxiliary power conversion system comprises at least one DC / AC module and at least one bidirectional DC / DC module. The method comprises the following steps of controlling one of the bidirectional DC / DC modules to reversely rise a voltage and judgingwhether voltage rising is succeeded or not after a working instruction is received; converting a first DC voltage provided by a corresponding energy storage module to a second DC voltage by the bidirectional DC / DC module if voltage rising is succeeded; controlling the other bidirectional DC / DC modules and the DC / AC modules to start, and judging whether the other bidirectional DC / DC modules and theDC / AC modules are successfully started or not; and controlling a second switch to attract and the controlling a pre-charging module to perform pre-charging operation if the other bidirectional DC / DCmodules and the DC / AC modules are successfully started. By the method, fault self-check is performed on each sub-module in the system before working of the auxiliary power conversion system, and the safety and the reliability of the system are greatly improved.
Description
technical field [0001] The invention relates to the technical field of trains, in particular to a control method for a train auxiliary power conversion system, a non-temporary computer-readable storage, a train auxiliary power conversion system and a train. Background technique [0002] With the rapid development of vehicle power supplies, auxiliary power conversion systems have been widely used. [0003] At present, the working process of the auxiliary power conversion system is generally: after detecting that the high voltage is normal, first close the neutral contactor, then close the pre-charging contactor, and then close the live line contactor after the pre-charging is successful, and the live line contactor is closed successfully After disconnecting the pre-charging contactor, if the disconnection is successful, each sub-module of the auxiliary power conversion system is ordered to start working. [0004] However, for the above-mentioned work flow, there is a risk of...
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IPC IPC(8): H02J1/00H02M1/36H02M3/335H02M7/48
Inventor 王英王超王兴辉张妮邬白贺王倩路琴
Owner BYD CO LTD