6 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…
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…
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…
An Accurate and Fast Start-up Scheme for Power System Real-time Emergency Control
Songhao Yang, Zhiguo Hao, Baohui Zhang +1
With the development of PMUs in power systems, the response-based real-time emergency control becomes a promising way to prevent power outages when power systems are subjected to l…
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…