H.T. Yip, M. Moscoso, G. Lloyd, K. Liu, Z. Wang –ALSTOM Grid
21стр
Traditional bias characteristic:
Improves stability during CT saturation.
Considers 2nd harmonic blocking or restraining to provide stability during inrush.
Traditional bias characteristic limitations:
Dual slope characteristic on its own may not maintain stability without requiring excessive over-dimensioning of the CTs.
2nd harmonic technique may slow down the bias differential element when CT saturation occurs during inteal faults.
21стр
Traditional bias characteristic:
Improves stability during CT saturation.
Considers 2nd harmonic blocking or restraining to provide stability during inrush.
Traditional bias characteristic limitations:
Dual slope characteristic on its own may not maintain stability without requiring excessive over-dimensioning of the CTs.
2nd harmonic technique may slow down the bias differential element when CT saturation occurs during inteal faults.