At ACRRES test site (Lelystad, Netherlands) a smart grid consisting of renewable energy sources (wind, PV, combined heat and power), electric vehicle chargers and variable power consumption units was installed. The key component of this smart grid was the Central Grid Control System, which ensured real-time monitoring and control of the grid in response to fast grid changes. An optimized system using business models developed by Lithuanian Energy Institute was implemented by the software company Pisga. ICM create a convenient HMI as a monitoring interface for the final user. Metering devices belonging to the NG family, a new generation of electric network analysers, were developed by Energy Team Spa. All renewables energy supplier systems and consumers were monitored by NG-9, a bi-directional meter designed to measure current consumption and energy flows in real time. Imported and exported energy measurements were then collected through the NG-Gateway, which allows data communication to the Central Grid Control System. Using this information in combination with external data (e.g. electricity price), the control system reacted on basis of advanced business model algorithms.