Experimental study on positive corona discharge characteristics in plane-single/double earthed rods air gaps under negative DC voltage

Research on Ultraviolet Characteristic Parameters of DC-Positive Polarity Corona Discharge on Conductors

“…The relationship between the spot area and the voltage for the 5 mm conductor is depicted in Figure 9. The voltage and its corresponding UV spot area were fitted using the least squares fitting algorithm, and the obtained function relationship is shown in Equation (8). The The voltage and its corresponding UV spot area were fitted using the least squares fitting algorithm, and the obtained function relationship is shown in Equation ( 8).…”

“…From the fitting results, it can be observed that the relationship between the spot area and the conductor voltage follows a quadratic function. U = −1.5769 × 10 −8 × S 2 + 5.5232 × 10 −4 × S + 50.4771 (8) In the equation, U represents the applied voltage on the conductor, the unit is kV, and S represents the spot area.…”

“…The detection of corona-related defects in transmission lines has been included in the scope of defect detection work for transmission lines. In recent years, ultraviolet (UV) detection technology has been widely applied for the accurate, fast, visual, and safe detection of corona discharges in electrical equipment [4][5][6][7][8][9]. Some relevant studies [10][11][12][13] have been conducted on the corona inception voltage of conductors using ultraviolet detection technology.…”