4 papers
CT Saturation Detection and Compensation: A Hybrid Physical Model- and Data-Driven Method
Songhao Yang, Yubo Zhang, Zhiguo Hao +2
Current transformer (CT) saturation is one of the dominant causes of relay protection devices' malfunctions, which pose a threat to the safe operation of the power system. To addre…
Model-Free Fast Frequency Support of Wind Farms for Tracking Optimal Frequency Trajectory
Yubo Zhang, Songhao Yang, Zhiguo Hao +1
The fast frequency support (FFS) towards frequency trajectory optimization provides a system view for the frequency regulation of wind farms (WFs). However, the existing frequency…
A Data-Aided Power Transformer Differential Protection without Inrush Blocking Module
Zexuan Lin, Songhao Yang, Yubo Zhang +2
When a slightly faulty transformer closes without load, the current waveform presents the coexistence of inrush and fault current. At this time, the inrush blocking module will blo…
A System-View Optimal Additional Active Power Control of Wind Turbines for Grid Frequency Support
Yubo Zhang, Zhiguo Hao, Songhao Yang +1
Additional active power control (AAPC) of wind turbines (WTs) is essential to improve the transient frequency stability of low-inertia power systems. Most of the existing research…