- Oddbjørn Gjerde
- WP2 Lead
- SINTEF Energi AS
Distributed ADMM* strategy for optimal control of DERs and OLTCs in a radial distribution grid
*ADMM -alternating direction method of multipliers
Challenge and objective
- To harness the potential from Distributed Energy Resources (DERs), appropriate control strategies and architecture are required in the distribution system to seamlessly control and cooperate the DERs with other voltage regulatory devices.
- In this work, a centralized, a local, and a distributed control system have been designed with an emphasis on the distributed controllers.
- In this work, an ADMM-based distributed control strategy is developed that is able to control both continuous and binary variables in a distribution grid.
- The three control strategies give very similar results when designed appropriately, demonstrating that near-optimal control can be achieved in multiple ways.
- Other aspects such as ICT infrastructure, resilience towards cyberattacks, and scalability should probably be of bigger concern when designing control systems for power systems.
Impact for distribution system innovation
- Reduced infrastructure investment by using flexibility resources for voltage regulation.
- Improved voltage quality and reduced losses.
- Potentially increased resilience towards mis use cases with appropriate control structure.
Reference in CINELDI
- J.R.A. Klemets, M.Z. Degefa: "A Distributed Algorithm for Controlling Continuous and Discrete Variables in a Radial Distribution Grid", IEEE Access, vol. 11, 2023.