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Ground type non-contact automatic neutral-section passing device

An automatic over-phase, non-contact technology, used in transportation and packaging, power lines, vehicle components, etc., can solve problems such as insignificant effects, increased arc-extinguishing structure, and inability to solve problems such as overvoltage and inrush current.

Inactive Publication Date: 2016-08-10
HARBIN PATEERN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foreign countries mainly solve it from the hardware structure of the electric segment, such as adding an arc extinguishing structure, reducing the current before the train enters the neutral section, disconnecting the current, etc., the effect is not obvious;
[0005] In China, "smart circuit breakers" are used to achieve phase switching to eliminate overvoltage and inrush problems. However, due to inherent defects such as pre-breakdown and bounce of mechanical switches, the closing phase error is large, and it cannot be solved well. Voltage and Inrush Problems

Method used

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  • Ground type non-contact automatic neutral-section passing device
  • Ground type non-contact automatic neutral-section passing device

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Embodiment Construction

[0017] The main circuit diagram of a new ground-type non-contact automatic over-current phase-splitting device using switching transformer TK technology is as follows figure 1 Shown: a ground-type non-contact automatic phase separation device, including isolating switches G1, G2, G3, switching transformers TK1, TK2, thyristors SCR1, SCR2, programmable controller PLC, holding resistor R; also includes a protective circuit breaker QF1, QF2, QF3, QF4, isolating switches G4, G5; the lower ends of the isolating switches G1, G2, G3 are respectively connected to catenary A, neutral line, and catenary B; the upper end of isolating switch G1 is connected to the high voltage side of switching transformer TK1 The left end, the right end of the switching transformer TK1 high voltage side is connected to the left end of QF3, QF1 is connected to both ends of the high voltage side of TK1 in parallel, the positive and negative parallel thyristor pair SCR1 is connected to both ends of the low v...

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Abstract

The invention discloses a ground type non-contact automatic neutral-section passing device and belongs to the technical field of electrified railways and power electronics. The ground type non-contact automatic neutral-section passing device can be used for control and protection when an electric locomotive passes through an electrical neutral section, so that overvoltage and inrush current which are generated when the electric locomotive passes through the neutral section are eliminated, and the service life of electrical equipment of the locomotive and overhead lines is prolonged. Particularly, the device plays an important role in safe and stable operation under the circumstance of a high speed train.

Description

technical field [0001] The invention relates to a ground-type non-contact automatic over-phase separation device, which belongs to the technical field of electrified railways and power electronics. Prolonging the service life of locomotive electrical equipment and catenary, especially in the case of high-speed EMUs, shows the important role of this device in safe and stable operation. Background technique [0002] The electric locomotive adopts single-phase power supply. In order to balance the three-phase power system, the traction power supply system adopts the method of segmental commutation, which is called electric split phase or simply phase split. Every 20 to 30 kilometers, at the exit of the substation Or the electric phase splitting device installed in the partition between two substations. When the train speed is 200 km / h, it has to pass through the electric separation-phase non-electric zone every 6 to 10 minutes, and the frequency is very high. [0003] The ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60M3/04
Inventor 潘家忠李天昊王桂华
Owner HARBIN PATEERN SCI & TECH