Influence of WAMS data corruption on small disturbance stability and WADC parameter tuning based on DTA

摘要

WAMS (Wide-area Measurement System) is one of the most potentially effective techniques to damp inter-area low frequency oscillations in power systems. This paper studies the data corruption phenomenon which is ubiquitous in WAMS and establishes the unified model of time-delay and data-loss. Then DTA (Damping Torque Analysis) index considering time-delay and data-loss is deduced based on the previous model and applied to WADC(Wide-area Damping Controller) parameter tuning combining with the phase compensation method. Firstly simulations are carried out in 2A4M(2Area 4Machine) Kundur system and HDPG(Huadong Power Grid) with different time-lays and data-loss ratios to show their impacts on small disturbance stability. Then DTA index is applied to PSS (Power System Stabilizer) parameter tuning and results show that it can effectively inhibit inter-area oscillations. With time-delay and data-loss ratio increasing, the superiority is getting more prominent.