At the same time, in order to further improve the emergency response efficiency, the number of emergency unlocking devices outside the vehicle has been increased. The new vehicle uses information technology to realize real-time monitoring of the health status of key moving parts such as bogies, which lays a foundation for the promotion and application of the Shenzhen Metro smart operation and maintenance system. The train of west extension line of line 9 replaces more than 70% of the traditional relays with a higher-security non-contact logic control system, and directly controls and drives the subway train contactors and electric air valves through software logic to complete various vehicles. The control function solves the single point failure hazard of the traditional relay control circuit with higher security, reliability and redundancy.
It is worth mentioning at this point that the West Extension Line of Shenzhen Metro Line 9 starts from Hongshuwan South Station in the east, passes through Shenzhen Bay station to Qianhai Bay station, and ends at Qianwan Station. It has a total length of 10.8 kilometers and 10 stations. The whole line is laid underground. In this way, the shield tunnel passes through complex geology such as silt, gravel, full-section hard rock, upper soft and hard, rock fault zone, full-section sand layer and lone stone. The construction difficulty is very large, the shield section crosses the large-scale anchor cable group, and the size of the anchor cable that crosses is also the first case in China.
The traction system is equivalent to the heart of rail transit vehicle, which is one of the three key core technologies (traction, braking and signal) in the field of rail transit. It is the most high-end core equipment in the rail transit system equipment. High value, large technical difficulty, high reliability requirements.
Rail transit traction system is a high-end application of power electronics and variable frequency speed control technology.