Traction substations automation and SCADA

Hardware selection criteria: 

•  Hardware availability in the market; 
•  Controllers support international standard PLC IЕС-1131; 
•  Controllers support protocol IEC 6070-5-104; 
•  Availability of special user software development environment. 

Software selection criteria: 

•  Support of IEC 6070-5-104 protocol with standard tools; 
•  Performance of functions required from the system (data acquisition, storage and processing, redundancy); 
•  Easy to maintain and program; 
•  Provision of necessary number of parameters; 
•  Availability of graphic objects library with possibility of expansion; 
•  Support of regional languages; 
•  Inbuilt programming language for implementation of difficult computing tasks.

•  number of supervised objects – up to 30; 
•  four-level structure; 
•  type of I/O signals: 

            - discrete I/O signals;
            - analog input signals; 

•  time of reaction to unit state transition – up to 5 sec.; 
•  time of command transmission to the control unit – up to 3 sec.; 
•  time between failures on functions of commands finishing and data acquisition – 50 thousand of hours; 
•  certified equipment; 
•  licensed software; 
•  communication channels: 

         - fiber-optic – (speed up to 10 Mb/s) 
         - copper line communication channel – (speed up to 1200 bit/sec). Copper line resistance - up to 3 kOhm; 

•  operation mode – constant, day and night (7/24);
•  main units power supply: 

        - for the 1st control level – 24V DC 
        - for the 2nd, 3rd and 4th control levels - one-phase AC network 220 V (+10/-15%) and 50 Hz (± 2%). 

•  maximum distance from operations control center to the site- 20 km; 
•  measured values transmission accuracy - at least 0,1 %; 
•  possibility of false command occurrence - no more than 10-6; 
•  protection level - IP 44; 
•  operation temperatures range +5…+45 ºС; 
•  relative air humidity 40…90 %; 
•  in case of ~220 V main power supply absence uninterrupted power supply of system's equipment is provided during minimum 60 minutes.