From DNO to DSO
To absorb greater amounts of renewable generation safely and cost effectively, grids will need to turn to accurate measurements instead of relying on simulation models. The underlying behaviour of inverter connected generation driving these evolving challenges apply to every transmission and distribution grid integrating renewables.
Unlike thermal and voltage constraints, system strength (fault level) is not readily measured and is currently calculated using off-line, static models. This leads to infrequent and very conservative calculations. Real-time system strength monitoring can provide a detailed understanding of how system strength varies across the network and under different configurations. This will allow system operators to make decisions based on accurate information and provides significant planning and operations benefits.
