Modelling the capacitance of the elongated plasma in tokamak.

The capacitance model suitable for the non-circular cross-section plasma is studied based on the capacitance model of the circular cross-section plasma. The coaxial elliptic-torus capacitor property is further derived and used to determine the capacity of non-circular cross-section tokamak plasma, such as EAST (Experimental Advanced Superconducting Tokamak). By testing all the physical terms in this model, we find that the capacitance [Formula: see text]) is increasing exponentially with the increase of elongation ratio (k/k), while the minor radius ratio (a/a) is just reversed at the flat-top of plasma current, and the capacitance property is implicitly included in the H-mode study during the L-H transition.

Study of the B-Dot Sensor for Aircraft Surface Current Measurement.

The B-dot sensor is a type of Rogowski coil widely used in the measurement of current. However, the accuracy of the B-dot for measuring aircraft high-frequency lightning current is greatly affected by factors such as numerical integration drift, high-frequency oscillation, and calibration. In this study, a new design and optimization for improving the B-dot measuring accuracy was carried out.

State of charge estimation of vanadium redox battery based on improved extended Kalman filter.

The accurate state of charge (SOC) estimation can protect the battery from overcharging and over-discharging, and it is useful to make an effective dispatching strategy. The extended Kalman filter (EKF) method is used to estimate SOC widely. But it does not consider the SOC constraints.