An advanced control strategy for DC interconnections of distribution systems considering curative system security

摘要

The increasing amount of renewable energy infeed into distribution systems has become a challenge for power system operation. Connecting several distribution systems via VSC-based DC-interconnections has been identified to be an effective alternative to conventional grid expansion to relieve the power systems. This paper introduces an advanced control strategy for DC-interconnected distribution systems based on curative system security to increase the maximum utilization of existing assets within security limitations. Furthermore, an approach to coordinate the setpoint determination of a DC-interconnection between two DSO's is introduced in this work.