Table 1: Closure laws for turbine load rejections Group Case Initial head (m) Closing law Changeover point B Opening y Corresponding time t (s) Opening time yb Opening time tb (s) Group 1 in No 1 pumped storage No 1 0 3.8 16.3 3.8 No 2 555.4 1.0 0.5 0.008 0 5.0 16.3 0.5 5.0 No 3 0 6.0 16.3 6.0 Group 2 in No 1 pumped storage No 4 0 3.8 16.3 3.8 No 5 610.2 1.0 0.5 0. 008 0 5.0 16.3 0.5 5.0 No 6 0 6.0 16.3 6.0 Group 3 in No 2 pumped storage No 8 1.0 0.6 0.05 0 4.0 17.75 22.75 4.0 No 9 286.3 0.008 0 5.5 17.75 22.75 0.6 5.5 Group 4 in No 2 pumped storage No 10 1.0 0.6 0.05 0 4.0 17.75 22.75 4.0 No 11 265.9 0.008 0 5.5 17.75 22.75 0.6 5.5