PMU-based angle constraint active management on 33kV distribution network

Active Network Management (ANM) is an effective approach to release more distribution network capacity for connecting renewable generation without expensive network reinforcements. A pilot project is being carried out by ScottishPower Energy Networks in collaboration with Psymetrix new ANM approach on the 33kV distribution network on Isle of Anglesey, North Wales. The new approach is known as Angle Constraint Active Management (ACAM), where a renewable generation is constrained based on voltage angle difference signals produced by Phasor Measurement Units, and a set of angle constraints derived through offline network simulations. ACAM requires fewer measuring devices and simpler control logic than existing ANM solutions, and in this case, 19 potential constraints are managed by 4 angle difference measurements. The paper describes the concept of ACAM, and the progress of the pilot project, including hardware installation and communication set-up. The results of angle constraints threshold studies using the network model for controlling future wind capacity addition at selected locations are presented. Based on the results, the benefits of ACAM and potential challenges of implementing PMU-based applications in distribution systems are outlined.