The Total Low Frequency Oscillation Damping Method Based on Interline Power Flow Controller through Robust Control

The interline power flow controller (IPFC) can control the active and reactive of different lines in system. To utilize flexible ability IPFC increase damping characteristic its AC system, this paper proposes a low-frequency oscillation (LFO) suppress method through IPFC. LFO is designed by adding supplementary signals to outer current loop In addition signals, are also added related loop, which total scheme. obtain system’s small signal model, identification technology based on PRONY algorithm used. addition, robust theory applied make controllers more adaptive. verify effectiveness proposed method, two including both for PSCAD software. Furthermore, simulation results prove reach better effect robustness.