Research Areas

Our laboratory explores a new method for power system control, operation and planning of a power system under changing circumstances of a power system. We especially focus on methodologies to keep stable supply of electricity for the integration of intermittent renewables energy sources (RESs).

Transient Stability Improvement Based on WAMS


Transient stability is one of the power system stability constraints that must be considered in the power system operation. A disturbance under an unscheduled power flow condition due to renewable energy sources (RESs) causes an unexpected transient instability phenomena. The aim of this study is to develop emergency control systems using high-speed communication and computing to prevent a transient stability caused by a disturbance under an unscheduled power flow condition.

Stability Improvement Using Grid-Forming Converters


Increase in ratio of the converter-interfaced RESs can cause the increase in the rate of change of frequency after a loss of generation and the decrease in the short circuit ratio. The aim of this study is to develop countermeasures using synchronous condensers and converters of distributed energy resources such as RESs and batteries for the improvement of the frequency and voltage stability after a disturbance in power systems.

Preventive Control for RES Forecasting Error


Forecasting error in the output of RESs can cause transmission network constraints such as ampacity, voltage limit, and transient stability. The aim of this study is to develop preventive control methods using generators, batteries and FACTS devices for preventing violation of the network constraints caused by the forecasting error in the output of RESs.