A5060720827- Power System Optimization and Stability
- Microgrid Control and Optimization
- Wind Turbine Control Systems
- Energy Load and Power Forecasting
- Power Quality and Harmonics
- Advanced Adaptive Filtering Techniques
- Power Systems and Renewable Energy
- Photovoltaic System Optimization Techniques
- Machine Fault Diagnosis Techniques
- Seismology and Earthquake Studies
- NMR spectroscopy and applications
- Real-time simulation and control systems
- Structural Health Monitoring Techniques
- Frequency Control in Power Systems
- Power System Reliability and Maintenance
- Smart Grid Security and Resilience
Hawaii Agriculture Research Center
2023-2025
University of Tennessee at Knoxville
2024
In this paper, a practical ambient-frequency-data-based inertia estimation method using physical equation is proposed and validated by real measurement data from Hawaii island grids. With high renewable penetration, accurate important urgent. Ambient frequency oscillation always exists in power grids, so the has advantages of real-time no need for additional disturbances. This paper first developed to offer clear mechanism easy implementation practice. To apply actual extract ambient further...
This paper proposes a real-world oscillation event analysis framework for power systems that include inverter-based resources together with synchronous generators. Specifically, the proposed combines both measurement-and model-based techniques to readily identify potential sources, replay numerical simulation, unveil underlying mechanism, and suggest mitigation methods wide range of events. To strengthen theoretical foundation our framework, this <italic...
With the displacement of synchronous generation by inverter-based resources (IBRs), power systems could face challenge reduced inertia since IBRs do not inherently contribute to system inertia. Therefore, there is rising interest in monitoring real-time applications for situational awareness. In addition, a growing number that provide fast frequency responses (FFR) form synthetic and P-f droop. It desirable quantify contribution these FFR controls as equivalent This paper proposes...
This letter discusses the 18-20 Hz oscillation event at 05:30 am on November 21, 2021, in Kaua`i's power system following trip of an oil plant. As far as authors are aware, this is first report a transmission system-wide subsynchronous driven by inverter-based resources (though question relatively small). In letter, we leverage two data-based methods-the dissipating energy flow method and sub/super-synchronous method-to locate sources oscillation. Also, build electromagnetic transient model...
The frequency measurement and rate of change (RoCoF) calculations are important for active power, control, frequency-related protection in power system operations. With the rapid decrease inertia under modern systems, however, multiple variations introduced by variable renewable energy bring large RoCoF introduce oscillations measurements. To shed light on this issue, article proposes a analysis technology, as well sensitivity real low-inertia grid. First, real-world event an island grid is...
As renewable energy penetration increases and the traditional generators retire in power grids, system inertia decreases exhibits significant daily fluctuations. Furthermore, fast frequency responses (FFRs) provided by inverter-based resources (IBRs) begin to playa very critical role bring new challenges real-time monitoring due difficulties of quantifying its artificial contribution. Thus, necessitating an accurate estimation tool will not only benefit secure grid operations, but also...