Coordination of centralised and distributed intelligence to reduce curtailment of flexible generators using active network management

Abstract

The development of better intelligence on the network management systems combined with a new model of connections for customers allows the UK Power Networks to defer traditional reinforcement. This consequently reduces connections, maintenance and operation costs for the customers. The development of intelligence at the field devices is key to the safe operation of the network and management of customer's connections. In view of that, the UK Power Networks has designed, developed and trialled a remote terminal unit (RTU) logic with fail-to-safe that integrates with the centralised smart applications and the distributed controllable devices. Therefore, customers will not only be controlled by a centralised system but also locally by an on-site RTU, which acts as a smart communication gateway with embedded intelligence to execute failsafe actions locally. These fail-to-safes are particularly important in the absence of a central control system which can then reduce the unnecessary curtailment of generators by introducing additional time and safe operating limits for them to export the power to the grid.