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Grid connection control method and system for auxiliary inverter of urban rail train

A technology for auxiliary inverters and urban rail trains, applied in the field of rail transit, can solve the problems of excessive three-phase voltage difference, inconsistent phase sequence, and long start-up time, achieving small workload, reducing economic losses, and low difficulty Effect

Active Publication Date: 2022-03-15
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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Problems solved by technology

[0009] The present invention aims at the above-mentioned problems such as unsuccessful start-up and long start-up time in the existing auxiliary inverter grid-connected control process, and provides a grid-connected control method and system for an auxiliary inverter for urban rail trains, which can solve the problem of auxiliary inverter grid-connected control. During the grid connection process, the grid connection fails due to excessive three-phase voltage difference and inconsistent phase sequence, and the startup time is short

Method used

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  • Grid connection control method and system for auxiliary inverter of urban rail train
  • Grid connection control method and system for auxiliary inverter of urban rail train
  • Grid connection control method and system for auxiliary inverter of urban rail train

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Embodiment

[0068] Example: figure 2 Auxiliary inverter power supply topology for a train project. In this power supply topology, there are three pantographs that can be connected to the 1500V DC bus, including 5 auxiliary inverters. The 380V AC bus has two AC bus contactors divided into three sections , where pantograph 1 is connected to auxiliary inverter-1 and auxiliary inverter-2, pantograph 2 is connected to auxiliary inverter-3, pantograph 3 is connected to auxiliary inverter-4 and auxiliary inverter -5, AC bus contactor 1 is installed on the 380V AC bus between auxiliary inverter auxiliary inverter-2 and auxiliary inverter-3, and AC contactor 2 is installed on auxiliary inverter-3 and auxiliary inverter 380V AC bus between transformers-4.

[0069] When controlling grid connection, set the start time as 6s and the interval start time as 1s.

[0070] The first cycle startup procedure for this train auxiliary inverter is:

[0071] S1. The TCMS system detects that any section of th...

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Abstract

The invention relates to a grid-connected control method and system for an auxiliary inverter of an urban rail train. The method is as follows: the TCMS system sends the auxiliary inverter start signal to the auxiliary Inverter: An auxiliary inverter detects that both 1500V and 380V AC buses have electrical signals within time T, then starts the auxiliary inverter within time T, sets it as the master, and sends auxiliary inverter The inverter bus activation signal is sent to other auxiliary inverters; if an auxiliary inverter detects the 1500V DC bus power signal and detects the auxiliary inverter bus activation signal, it will start at interval T 0 The auxiliary inverter is started internally, and the auxiliary inverter sends an auxiliary inverter bus activation signal to other auxiliary inverters; all auxiliary inverters of the train are started in the above manner. The invention greatly shortens the start-up time on the basis of ensuring the smooth start-up of the auxiliary inverter.

Description

technical field [0001] The invention belongs to the technical field of rail transit and relates to inverter control technology, in particular to a grid-connected control method and system for auxiliary inverters of urban rail trains. Background technique [0002] Combined with the current development of the rail transit industry, the design, commissioning, and use of trains tend to be more and more intelligent, informatized, and automated. Trains need to add more and more on-board equipment to realize these functions. These new equipment put forward higher requirements for the power supply of the train. In the design stage of the train, the auxiliary inverter needs to fully consider the impact of the new equipment on the overall power supply of the vehicle. The main technical parameters include voltage, inrush current, power, etc. [0003] In the early days of rail transit development, there were not many devices that needed power supply in the on-board equipment of the trai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61L15/00H02J3/38
CPCB61L15/0063B61L15/0081H02J3/381
Inventor 尹龙龙徐磊李文正王曙李德祥李然唐化勇张程
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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