Summary
Urban power systems with high load density and strong dependence on external grid support are particularly vulnerable to disturbances leading to sudden islanding. Stable islanded operation in such networks requires accurate and timely balancing of internal generation and load. Conventional islanding schemes based on static relay settings and predefined load shedding stages often lack the flexibility to respond effectively to rapidly changing operating conditions.
Read more Read lessThis paper presents the utility experience of implementing a Dynamic Islanding Readiness
Scheme (DIRS) in a large metropolitan power network. The scheme continuously evaluates real-time system conditions and proactively prepares the grid for potential islanding by dynamically determining the required load shedding. A centralized SCADA-based logic sequentially enables under-frequency relays (UFRs) starting from the lowest priority until the enabled load matches the prevailing tie-line power exchange.
By pre-arming only the required UFR load blocks, DIRS ensures controlled and precise load shedding during islanding events, enabling rapid generation–load balance while avoiding overor under-shedding. The solution enhances operational readiness, reduces operator intervention, and provides a scalable framework for improving grid resilience in complex urban power systems.
Additional informations
| Publication type | Session Materials |
|---|---|
| Reference | C2_10455_2026 |
| Publication year | |
| Publisher | CIGRE |
| Country | India |
| Study committees | |
| File size | 860 KB |
| Price for non member | 30 € |
| Price for member | 30 € |
Authors
DALVI* Siddhesh - Tata Power, INDIA; GOLE Milind - Tata Power, INDIA; MHATRE Rohan - Tata Power, INDIA; CHANDRAKAR Akhilesh - Tata Power, INDIA
Keywords
