Metrological Issues on the use of Low Power Instrument Transformers for Smart Grids

The increased complexity of power networks due to the wide diffusion of distributed generation has led smart grid operators to implement suitable solutions for assuring robust control. In particular, two main strategies have been adopted: (i) use of interconnected devices (protection relays, energy meters, PMUs, etc.) equipped with some intelligence; (ii) the start of a mass deployment of such devices in many parts of the power network. This way, a huge amount of information can be gathered thus helping implement, in each instant, the better decision for the network operation.