After the opening of Line 4, the daily passenger flow reached 2.65 million, and the passenger flow intensity is still at the forefront of the country, which has higher requirements for operational safety and order.
As a strong promoter of the electrification of national rail transit, TYT Taiyong Long March provides customized comprehensive power distribution solutions for Xi'an Metro Line 4, and the TBBQ3 series dual power transfer switch (ATSE) is widely used in the power distribution cabinet of this line to provide reliable electrical guarantee for the safe operation of the subway.
The power distribution system is the cornerstone of the safe operation of the subway
If the power supply is interrupted, it will cause the paralysis of subway traffic, seriously affect people's travel, and may even threaten the safety of passengers' lives and property. Therefore, reasonable and reliable power supply and distribution methods are the premise and foundation of subway operation and maintenance.
At present, rail transit is developing in the direction of green environmental protection, intelligent energy saving, efficiency and efficiency. In order to ensure the safe, reliable, effective and economical operation of all power lighting power distribution, Xi'an Metro Line 4 in the planning and design, emergency lighting, substation operation power supply, fire automatic alarm system equipment and other first-level loads, it is determined to adopt dual power supply and double return line power supply mode, of which the normal lighting of the station hall and platform public area adopts the cross-distribution mode of 50% load by the two sections of the substation low-voltage cabinet, and the final power distribution equipment of the rest of the equipment is equipped with a dual power automatic switching device or a dual power distribution box.
TYT's flagship ATSE escorts the operation of the subway
In this project, the TYT TBBQ3 series ATSE plays a key role. This flagship ATSE, with AC-33iA and AC-33B dual categories of use, not only does not fear the impact of high-sensitivity load switching such as self-spray pumps at stations, but also fully meets the needs of subway operation inspection tests; Excitation drive ensures that the conversion time is < 100ms, and the power supply continuity is high, which meets the power supply of fire smoke exhaust fans, fire boost and voltage regulation equipment in subway stations.
At the same time, the TBBQ3 series ATSE is designed in strict accordance with the industrial grade, fully complying with the requirements of electrical equipment in the GB 50157 "Metro Design Code" standard, and adapting to the complex environment of rail transit. This ATSE equipment, which is widely used in the field of rail transit in China, adopts a dedicated PC-level integrated design, simple structure, reliable performance, and has a small size that perfectly integrates into the emergency lighting distribution box.
For the harsh environment of the subway, the TBBQ3 series ATSE contacts adopt silver alloy treatment process and arc contact technology, which can ensure long-term corrosion resistance, oxidation resistance, and improve the short-term resistance value.
In addition, when the subway is running, the electrical system and non-linear power electronic system may produce strong electromagnetic interference, and the EMC electromagnetic compatibility emission level of the TYT ATSE series controller is as high as Class A, which avoids the malfunction of the controller as the "brain" of dual power conversion and ensures the safe and stable operation of the vehicle.
