APPLICATION OF IEC 61850-90-5 STANDARD-BASED PREDICTIVE DYNAMIC STABILITY SYSTEM

The test system adopted in the research study is the Eskom West Grid transmission network.   

The modified network is a multi-level voltage grid with 400kV running through the transmission lines and voltages of 132kV, 110kV,50kV,33kV,24kV and 16.5kV being the voltages available at the generating station buses. The system comprises of 2 independent power plant (IPPs) of renewable energy supplying the grid when necessary. The grid modelled in compliance with the national regulating standard (NERSA) which allows a per unit deviation of up to 10% from the standard 1.0 p.u in voltages across all buses in the grid. At Palmiet Pump storage generation, a SEL700G relay is placed as main protection for the generators then another SEL-421 relay is optimally placed at the Palmiet 400kV outgoing line to serve as back-up protection to the generator out-of-step protection.