Case Study of Special Protection Scheme Implementation in the Kalimantan Power System Using Real-Time SCADA Data Integration and Industrial RTOS-Based Controller

Abstract

The rapid expansion of interconnected power grids necessitates a critical transition from conventional static defense schemes to dynamic cyber-physical Special Protection Schemes (SPS). However, legacy integrations running on commercial-grade platforms, such as mini PCs, suffer from high scheduling jitters and vulnerability to substation electromagnetic interference, leading to cascading collapses during major contingencies. This paper presents a technically validated, real-time SCADA-integrated SPS framework deployed on a ruggedized, real-time operating system (RTOS)-based industrial controller using unified IEC 60870-5-104 and IEC 61850 protocols. The performance of this cyber-physical system is validated against a historical cascading blackout in the Kalimantan interconnected grid. By replacing the commercial mini PC, the RTOS industrial controller eliminates non-deterministic processing delays, achieving a deterministic execution latency of 138 milliseconds, which operates safely below the grid's 200-millisecond transient stability limit. Deployed field results show that the proposed system achieves a near-100% success rate in preventing cascading generator trips, successfully isolating disturbances to localized events rather than system-wide blackouts. Furthermore, this cyber-physical approach conserves 183,656 US dollars in direct operational losses per event.