Pre-control method and controller for electric traction train traction converter
A traction converter, electric traction technology, applied in the direction of electrical components, power lines, vehicle components, etc., to achieve the effect of avoiding secondary faults, avoiding overcurrent, and avoiding damage
Active Publication Date: 2019-09-24
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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[0005] Aiming at the problems in the prior art, this application proposes a pre-control method and controller for traction converters of electric traction trains, which can cause poor current reception or bow jumping between the pantograph and catenary Timely and accurate fault prediction and pre-control can avoid problems such as overcurrent in the rectifier and the traction transformer connected to the rectifier, and can timely and effectively improve the safety and operating efficiency of electric traction train equipment
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[0045] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0046] In the prior art, in order to solve the overcurrent problem of traction transformers and rectifiers, the method of tripping the main circuit breaker is usually adopted. This method has a mechanical delay, which is likely to cause untimely protection and cannot fundamentally eliminate the phenomenon of tripping caused by overcurrent problems, Figure 9 ...
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The invention provides a pre-control method and controller for an electric traction train traction converter. The pre-control method includes the steps that an input current of a rectifier of an electric traction train at the same time, the power of an inverter connected with the rectifier and the current equivalent difference of the rectifier are acquired; and whether the rectifier currently meets preset requirements or not is judged, if yes, the rectifier and the inverter are blocked to solve the problem that overcurrent occurs in a traction transformer connected to the rectifier. According to the pre-control method and the controller for the electric traction train traction converter, faults can be timely and accurately predicted and pre-controlled when the phenomenon of poor current collection or a pantograph jumping between a pantograph and overhead lines occurs, and therefore the problems of overcurrent and the like of the rectifier and the traction transformer connected with the rectifier are solved, and the safety and operation efficiency of electric traction train equipment can be improved timely and effectively.
Description
technical field [0001] The present application relates to the technical field of rail transit on-board equipment, in particular to a pre-control method and controller for traction converters of electric traction trains. Background technique [0002] The electric traction train adopts the catenary power supply method. Through the pantograph installed on the roof, the electric energy is introduced from the catenary to the train traction transformer installed on the electric traction train, and then connected to the wheels through the grounding wire, and finally flows back to the substation. [0003] Different from general electrical equipment, electric traction trains move at high speed relative to the catenary. Due to freezing and other reasons, poor current reception between the catenary and pantograph and bow jumping occur from time to time. These situations are likely to cause rectifier and traction transformer overcurrent problems. For example, when the electric tractio...
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IPC IPC(8): B60M3/00H02H7/12
CPCB60M3/00H02H7/1216
Inventor 刘洋马驰杨宁高吉磊赵震刘伟志左鹏王永翔张义海殷振环马颖涛董侃蒋威王霖崔冬冬白龙黄成光李瑮冉周义杰宋欣武邱腾飞秦帅
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD