Motor train unit line-side circuit and control method thereof

Abstract

The invention discloses a motor train unit line-side circuit and a control method thereof. The motor train unit line-side circuit comprises two motive power units in the same structure, wherein the two motive power units are connected through an isolation switch branch circuit, the isolation switch branch circuit is formed by serially connecting two isolation switches, and both ends of the isolation switch branch circuit are respectively connected to a position between a primary side current transformer and a vacuum circuit breaker of the two motive power units. The line-side circuit is a basically symmetrical circuit, the circuit type is simple, the equipment arrangement and the wire distribution are simple, the circuit control is easy to realize, and in addition, the train operation reliability is very high.

Description

technical field [0001] The invention relates to a high-voltage network side circuit and a control method, in particular to a high-voltage grid side circuit and a control method thereof. Background technique [0002] The current receiving circuit on the primary side of the existing EMU is basically composed of electrical components such as pantograph, vacuum circuit breaker, grounding switch, lightning arrester, isolating switch, etc. Different combination methods and different control methods make their functions different, and then the reliability of the vehicle's current reception is different. [0003] Due to the different combinations of electrical components of the primary side current receiving circuit of the EMU, figure 1 A schematic diagram of a possible EMU side circuit structure is given. The EMU side circuit includes two power units with the same structure, and each power unit includes a pantograph, a high-voltage voltage transformer, a vacuum circuit breaker, a ...

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Problems solved by technology

[0004] from figure 1 It can be seen that since the two pantographs are directly connected by high-voltage cables, in the event of a main circuit breaker failure, the train will lose half of its power, which will lead to poor redundancy of the train and reduced operational reliability ; Due to the use of an isolating switch, the symmetry of the circuit structure of the train is not good, thereby increasing the workload of design and manufacture; there are also some circuit structures that do not use an isolating switch, which reduces the fault operation capacity of the train. These circuit structures It may also make the control system design of the train, the wiring of the train, etc. more complicated

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