Comparison of Control Techniques for Harmonic Isolation in Series VSC-Based Power Flow Controller in Distribution Grids

The application of power electronics equipment in medium voltage (MV) distribution grids can provide new management solutions for flow control, load balancing and problems. A series MV VSC-based controller has recently been presented to interconnect two radial feeders performing active reactive transfers improve the flexibility utilization these circuits a controlled secure way. Although not previously explored, this integrate functionality filter, accomplishing independent control fundamental while isolating harmonic content between interconnected feeders. This prevents pollution from one feeder propagating other, improving quality. To implement isolation, several strategies be used. Therefore, paper provides comparative analysis main techniques found literature: Synchronous Reference Frame (SRF) Proportional Resonant (PR) controller. Assessments are conducted both through simulations experimental results meshed network at 13.8 kV with different types non-linear loads. In simulation cases, algorithms showed similar results; however, PR-based solution exhibited better performance harmonics other.