Grid Forming Control Tuning for a Hybrid Inverter-Based Resource Power Plant

作者：Lingling Fan, Zhixin Miao, Deepak Ramasubramanian · 发表于：IEEE Transactions on Sustainable Energy · 年份：2025 · DOI：10.1109/tste.2025.3642072 · 被引用次数：3 · 研究领域：Microgrid Control and Optimization、Wind Turbine Control Systems、Smart Grid Energy Management

A hybrid inverter-based resource (IBR) power plant consists of grid-following (GFL) and grid-forming inverter-based resources (GFM-IBR) connected in parallel. This research focuses on how to design and tune GFM's control parameters to ensure stable operation of the hybrid power plant for weak and strong grid conditions. We consider two design cases: one where the GFL-IBR does not provide frequency support, and one where it does. It is found that the GFM's power-frequency synchronizing system can lose stability when the power-frequency droop constant is large and/or the grid is strong. Additionally, if the GFL has its frequency support enabled, oscillation stability worsens. To explain the mechanism of the interactions, we construct a feedback system for the synchronizing loop, which consists of the GFM's power-frequency droop control that generates the GFM's synchronizing angle, the GFL's phase-locked loop that measures the voltage phase angle, the GFL's frequency-power control that generates its power order, and the rest of the system. The feedback system is effective in illustrating the potential stability risks. Successful design ensures that the hybrid power plant can operate smoothly and ride through grid disturbances.