MODERNIZATION OF RELAY PROTECTION OF THE SWITCHGEAR SYSTEM OF THE SERDICA TRACTION SUBSTATION

Vasil Dimitrov; Martin Getov

Scientific paper ID 2435 : 2023/3

MODERNIZATION OF RELAY PROTECTION OF THE SWITCHGEAR SYSTEM OF THE SERDICA TRACTION SUBSTATION

Vasil Dimitrov, Martin Getov

The Sofia underground is the main transport artery of public urban transport in the city of Sofia. On 28.01.1998, a section of the first diameter with 5 metro stations and a length of 6.5 km, from ”Slivnitsa” Blvd. through ”Lyulin” district next to ”K. Velichkov” Blvd., was put into operation. On 17.09.1999, the ”Oplchenska” metro station was put into operation, and on 3110.2000 - metro station ”Serdika” on ”St. Nedelya” square. Then the total length of the route of the first metro radius is 8.1 km. with 7 metro stations.

The control of the objects and devices in each traction substation is carried out by the Central Dispatch Center (CDC). The system for control needs to be of high reliability due to the importance of the controlled equipment. The automated management of complex dynamic processes with increased ments in terms of safety and reliability is carried out through a Supervisory Control and Data Acquisition system (SCADA). This paper examines the reasons that led to the need to upgrade the Sitras DPU96 PU (Siemens) relay protection of the switchgear system 825V in the ”Serdika” traction substation. The technical solution for the elimination of problems and the implementation of the necessary control equipment of the latest generation Sitras MDC (Siemens) is indicated. The advantages and possibilities for implementing new functions are analyzed.

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тягова понизителна станция (ТПС) релейна защита Sitras SCADAtraction substation relay protection Sitras SCADAVasil Dimitrov Martin Getov

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