10 papers
An Argument-Principle Based Stability Assessment Method for Grey-Box DFIG Systems
Tao Zhang, Zhiguo Hao, Songhao Yang +2
Considerable efforts have been made to analyze the small-signal stability of doubly fed induction generator (DFIG) systems. However, commercial confidentiality and frequency coupli…
An Additional Resonance Damping Control for Grey-Box D-PMSG Wind Farm Integrated Weak Grid
Tao Zhang, Songhao Yang, Zhiguo Hao +2
Considerable efforts have been made to address the resonance issue of the Direct-drive Permanent Magnet Synchronous Generator (D-PMSG) wind farm integrated power systems. However,…
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…
PLL Based Sub-/Super-synchronous Resonance Damping Controller for D-PMSG Wind Farm Integrated Power Systems
Songhao Yang, Ruixin Shen, Jin Shu +4
Existing sub-/super-synchronous (SSO) suppression methods for the direct-drive permanent magnet synchronous generators (D-PMSG) integrated power systems are mainly achieved by exte…