Urban rail transit direct-current traction power supply isolation switch interlocking system and method

Abstract

The invention discloses an urban rail transit direct current traction power supply isolation switch interlocking system and method, and the method comprises the following steps: setting GOOSE communication node machines in all traction substations, carrying out the inter-station cascading of all communication node machines, and constructing a GOOSE network for the equipment information sharing ofa DC power supply system. A direct current interlocking device is arranged in each traction substation, collects the position of each switch in the substation, and is connected to the GOOSE network through a GOOSE communication node mechanism in the substation. And the direct current interlocking device builds interlocking logics of isolation switch operation according to the switch position information of the local and other traction substations, and determines whether the isolation switch in the substation can perform switching-on and switching-off operation or not according to a logic judgment result. According to the scheme of the invention, the intelligent level and reliability of operation interlocking of the isolation switch are greatly improved, the complexity of interlocking logic implementation is reduced, the efficiency of engineering implementation and operation and maintenance is improved, and the maintenance time and cost of operation and maintenance personnel for the system are reduced.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to an interlocking system and method of an isolating switch for DC traction power supply of urban rail transit. Background technique [0002] As an important part of the urban rail transit system, the DC traction power supply system provides electric energy to electric vehicles through the DC traction catenary. The isolating switch is the main power stop and transmission control equipment that connects the DC traction catenary system and the power supply system of the traction substation. Ensure the safety of maintenance personnel and maintenance equipment; 2. According to the needs of power supply, open and close operations are performed to change the working status of the power supply system and improve the flexibility of power supply. In order to prevent accidents such as abnormal power outages of the DC power supply system, equipment damage, and even personal c...

AI Technical Summary

Problems solved by technology

It is usually difficult to detect the abnormality of the cable channel in time, and there is a risk that the switch position signal cannot be transmitted. In particular, the interlocking judgment of the cross-area isolation switch requires the switch position information in the adjacent traction substation, and the signal transmission distance is long, so it can only be passed through regular inspections. 2. The interlocking equipment of the isolating switch is usually placed underground, but the humidity in the underground environment is high, and the corrosion resistance of the relays and auxiliary contacts in the interlocking equipment is poor, which makes the interlocking equipment of the isolating switch have a high damage rate ; 3. The interlocking equipment of the isolating switch realizes the interlocking logic through the conditional connection of the auxiliary contacts in the secondary electrical control circuit. The secondary wiring is many and complicated, which brings great difficulties to the maintenance of the equipment; 4. Phase The switch position information between adjacent traction substations is transmitted through electrical signals. The distance of electrical signal transmission is limited and the anti-interference ability is poor. However, the distance between traction substations in urban rail transit is long, and the electromagnetic interference in the underground environment is large, resulting in The stability of electrical signal transmission is poor, and it is easy to cause data reception errors

Images