Table 10 The LCIs and bounded intervals for the unknown system state parameters of the 6-bus test network
From: The computation of confidence intervals for the state parameters of power systems
Parameters to be estimated | True values | LCIs | Bounded intervals | ||
|---|---|---|---|---|---|
Point estimates | Interval estimates | Point estimates | Interval estimates | ||
θ 02 | −3.7 | −3.67 | (−3.99, −3.35) | −3.51 | (−5.20, −2.52) |
θ 03 | −4.3 | −4.23 | (−4.83, −3.71) | −3.91 | (−5.88, −3.21) |
θ 04 | −4.2 | −4.19 | (−4.52, −3.86) | −3.97 | (−4.95, −3.09) |
θ 05 | −5.5 | −5.27 | (−5.69, −4.85) | −4.84 | (−5.10, −3.88) |
θ 06 | −5.9 | −5.94 | (−6.50, −5.38) | −4.81 | (−5.16, −1.47) |
V 01 | 241.5 | 241.53 | (238.97, 244.08) | 246.97 | (239.59, 253.41) |
V 02 | 241.5 | 241.73 | (239.17, 243.88) | 245.59 | (236.09, 250.88) |
V 03 | 246.1 | 246.13 | (243.64, 248.62) | 243.94 | (235.70, 250.49) |
V 04 | 227.6 | 227.57 | (224.92, 230.23) | 231.33 | (222.59, 237.38) |
V 05 | 226.7 | 226.67 | (224.05, 229.30) | 221.12 | (216.08, 230.87) |
V 06 | 231.1 | 231.05 | (228.40, 233.71) | 231.15 | (224.66, 239.45) |