Challenge
As Greenchoice’s renewable energy portfolio grows, curtailment is more and more important to minimize imbalance and optimize the portfolio. Such a task requires an advanced energy management system because the sites are different from each other. There are three challenges with a project like this: (1) seamless integration with existing hardware, (2) a robust control algorithm, and (3) adaptable technology capable of interfacing with diverse hardware configurations. These requisites ideally align with the capabilities of STELLAR’s Energy Control module.
Approach
We integrated with the sites’ SCADA systems and inverters. Where possible, we connected with sites using pre-existing infrastructure (using cloud-to-cloud or cloud-to-site technology). At a few sites, we installed gateways to connect. Once a resilient link was established between the sites and STELLAR, our Smart Energy Solutions platform, we started to curtail. Based on Greenchoices’ set points, we were able to steer the sites in real-time, to curtail energy production during periods of negative pricing and supply-demand imbalances.
Outcome
The implementation of STELLAR has helped Greenchoice make strides on its road towards further utilization of intelligent, automated, real-time steering of its assets. Doing so has created the possibility of capitalizing on flexibility on both the individual site level (for solar and wind) and on the portfolio level. The curtailment efforts have financial implications (Greenchoice avoids imbalance fees) and sustainable impact: curtailed assets help stabilize the grid.
