Traction rectifier transformer isolation grounding system

Abstract

The invention discloses a traction rectifier transformer isolation grounding system. The traction rectifier transformer isolation grounding system comprises a three-pole traction rectifier transformerisolation grounding system arranged at a three-phase power input terminal of a traction rectifier transformer, and a six-pole traction rectifier transformer isolation grounding system arranged at a six-phase power output terminal of the traction rectifier transformer. According to the traction rectifier transformer isolation grounding system, a rotating shaft of an isolating switch and the rotating shaft of a grounding switch are driven to rotate through an electric operating mechanism box to achieve opening and closing of the isolating switch and the grounding switch, thereby achieving powertransmission and power outage of an input end power supply and an output end power supply of the traction rectifier transformer and connection and removal of circuit protection ground wires of the input end power supply and the output end power supply to ensure the electric safety of equipment and the life safety of the personnel; and meanwhile, real-time communication can also be achieved through a digital communication technology and a remote control center, a ''remote control'' function can be completed and the real-time state of the traction rectifier transformer isolation grounding system can be transmitted to a central control room for real-time monitoring.

Description

technical field [0001] The invention relates to the maintenance of traction power supply system of urban rail transit, in particular to a traction rectifier transformer isolation grounding system. Background technique [0002] At present, in the urban rail transit DC1500V traction power supply system, the working principle of the traction rectifier transformer is to send the 35KV three-phase AC power frequency power supply from the 35KV high-voltage feeder cabinet through the cable to the input end of the traction rectifier transformer, through the transformer winding Transform and output two sets of six-phase AC1180V AC power frequency, and then send to the DC rectifier cabinet through six cables, rectify and output DC1500V DC power in the DC rectifier cabinet for the operation of various equipment in the rail transit operation system. Therefore, the traction rectifier transformer is a very important key equipment in the DC1500V traction power supply system of rail transit....

AI Technical Summary

Problems solved by technology

[0018] 1. The distance between the isolating switch at the input end of the traction rectifier transformer and the isolating switch at the output end is too far, and it is time-consuming and troublesome to disconnect and close the isolating switch

[0019] 2. During the inspection and maintenance of 35KV circuits, the safety requirements for electrical insulation are high, and the electrical insulation of high-voltage cables and high-voltage insulation terminals is easily damaged during the operation process. It is difficult to restore, the recovery time is long, and the recovery cost is high.

[0020] 3. During the inspection and maintenance process of the traction rectifier transformer, the work intensity of hanging and removing the ground wire is high, the reliability is low, and the working time is long and the efficiency is very low.

Moreover, the contact quality of the grounding wire can only be judged by naked eyes, and the reliability is relatively poor.

[0021] 4. During the repair and maintenance process of the traction rectifier transformer, the on-site conditions of the personnel and the real-time status of the safety lock of the equipment cannot be transmitted to the remote place to realize remote real-time monitoring; at the same time, the operation of the operating equipment cannot be directly controlled by the remote control center

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