AC-DC hybrid grid control

“An AC/DC hybrid power grid combines both AC and DC transmission and distribution systems, making it easier to integrate renewable energy sources such as wind and solar power into the electrical grid. By connecting AC and DC systems through power electronics devices, such as converters, power can be transferred seamlessly between the two systems. This hybrid approach can improve efficiency, reduce the cost of energy transmission, and provide greater system stability. The use of an AC/DC hybrid power grid can also facilitate the integration of energy storage systems, improving the reliability and resilience of the electrical grid and supporting the integration of renewable energy sources.” 

My research focus on developing AC-DC hybrid grid control algorithm based on power system analysis theory, linear/nonlinear control thory. From this research, I anticiapte the enhancement of power grid resillience, power system stability enhancement, low carbon emission (i.e., net zero).

“Development of bi-directional power conversion control system technology based on renewable energy such as photovoltaic power generation and wind power generation requires efficient energy balance control technology in accordance with changes in energy supply sources, load conditions, and user-required power demands for stable power supply”

“Three-phase distribution feeders are umblanced because of conductor spacing and the unbalanced loads served. Because of this, the line-to-line voltages serving an induction motor will be unbalanced. When a motor operates with unbalanced voltages, it will overheat and draw unbalanced currents that may exceed the rated current of motor”

- Kirsting, Distribution System Modeling and Analysis, Fourth Edition, 2018

“The harmonics probelm in power system is not a new problem. (…) Since power system harmonic distortion is mainly caused by non-linear loads and power electronics used in the electrical power system, the presence of non-linear loads and the increasing number of distributed generation power systems in electrical grids contributes to changing the characteristics of voltage and waveforms in the power systems”

- Lu.et.al., Harmonic Balance Finite Element Method: Applications in Nonlinear Electromagnetics and Power Systems, Wiley & Sons, 2016