A ground power supply for EMUs
A ground power supply, EMU technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as huge costs, and achieve the effects of maintaining power factor, preventing excessive neutral current, and eliminating load harmonic currents
Active Publication Date: 2019-02-12
CHINA RAILWAY DESIGN GRP CO LTD +1
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- Description
- Claims
- Application Information
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Problems solved by technology
This method needs to invest a huge cost. At the same time, single-phase power supply lines and three-phase power supply lines are laid to meet the ground power supply needs of different types of EMUs, or a switch is installed in the power supply lines, and only one type of power supply is supplied to EMUs at the same time. powered by
Method used
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Embodiment 1
[0040] see figure 1 , a ground power supply for an EMU, the output of the ground power supply for the EMU is connected to the output side of the power transformer, and simultaneously connected to the load side, and the load side is connected to the EMU;
[0041] The ground power supply of the EMU is sequentially arranged along the flow direction of the current: an input switch 2, a first current sensor module 3, a self-commutation bridge circuit module 4 and a DC circuit 5;
[0042] The first current sensor module 3 is used to detect the output current i of the ground power supply of the EMU sa , i sb , i sc ;
[0043] The output current flows bidirectionally between the output side of the power transformer and the self-commutated bridge circuit module (4); A combination of components, such as a combination of air circuit breakers, AC contactors and fuses.
[0044] see figure 1 , The self-commutation bridge circuit module 4 is composed of 6 IGBTs, the AC side of which ...
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The invention discloses a ground power supply of a motor train unit. The ground power supply comprises an input switch, a current sensor, a self-commutation bridge type circuit, a direct current circuit, a control circuit for controlling and protecting, a driving protection circuit and other auxiliary circuits, and a current sensor / transmitter mounted on a main loop of a power grid which are arranged on a current path in sequence. The ground power supply of the motor train unit is connected with the output side of a power transformer in parallel, so that power supply to different motor train units through the same bus can be realized; and in addition, power utilization requirement of motor train units of different models at the same time can be satisfied, without needing back braking or laying two groups of buses, thereby simplifying design of the ground power supply of the motor train unit, and lowering construction cost.
Description
technical field [0001] The invention belongs to the field of electric energy conversion and control of power electronics, and relates to a ground static variable power supply, in particular to a ground power supply device which is installed in a motor vehicle operation station and provides external working power for the motor train unit. Background technique [0002] EMU trains need to be overhauled regularly, and ground power supply units are required to provide power supply support during maintenance operations. The existing ground power supply of different types of EMUs requires three-phase 50HzAC400V or single-phase 50HzAC400V; if the single-phase 50HzAC400V power supply is directly obtained from the output of the 10 / 0.4kV power transformer, the output of the power transformer will be unbalanced and the upper high-voltage switch will trip. Typical EMU ground power requirements are shown in Table 1. [0003] Table 1 Power demand for ground power supply of typical EMUs (s...
Claims
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IPC IPC(8): H02M7/797H02J3/18H02J3/01H02J3/26
CPCH02J3/01H02J3/1821H02J3/1842H02J3/26H02M7/797Y02E40/30Y02E40/40Y02E40/50
Inventor 王斌晓李宏刚关磊张国栋周晋王亚彬王宁王源山郑晓庆屈洪鑫刘卓辉王开怀张建荣李育春孙运杰
Owner CHINA RAILWAY DESIGN GRP CO LTD