From: Design of a robust PID-PSS for an uncertain power system with simplified stability conditions
Q p.u. | % M | P in p.u. | |||||
---|---|---|---|---|---|---|---|
0.2 | 0.4 | 0.6 | 0.8 | 1 | 1.2 | ||
Relative Stability(σmax) | |||||||
−0.4 | + 30 | − 0.6026 | − 0.9114 | −1.2797 | − 1.2690 | − 1.2551 | − 1.2400 |
− 30 | − 0.5956 | −0.8983 | − 1.2757 | −1.2713 | − 1.2647 | −1.2571 | |
− 0.2 | + 30 | − 1.2207 | − 1.2870 | − 1.3128 | −1.3186 | − 1.3151 | −1.3069 |
− 30 | −1.2629 | − 1.3023 | − 1.3234 | −1.3305 | − 1.3309 | −1.3280 | |
0 | + 30 | −1.3869 | −1.3558 | − 1.3678 | −1.3758 | − 1.3770 | −1.3733 |
−30 | −1.4846 | −1.3943 | − 1.3932 | −1.3980 | − 1.4001 | −1.3994 | |
0.2 | + 30 | −1.7087 | −1.5090 | − 1.4679 | −1.4577 | − 1.4529 | −1.4479 |
− 30 | −1.8812 | − 1.5722 | − 1.5084 | −1.4905 | − 1.4838 | −1.4796 | |
0.4 | + 30 | − 2.2016 | −1.7473 | − 1.6206 | − 1.5733 | −1.5509 | − 1.5372 |
−30 | − 2.4677 | − 1.8335 | −1.6755 | − 1.6164 | −1.5895 | − 1.5748 | |
Minimum damping ratio (ζmin) | |||||||
−0.4 | + 30 | 0.4230 | 0.4024 | 0.3980 | 0.3960 | 0.3946 | 0.3935 |
−30 | 0.3089 | 0.2932 | 0.2899 | 0.2886 | 0.2878 | 0.2873 | |
−0.2 | + 30 | 0.5275 | 0.4379 | 0.4126 | 0.4023 | 0.3970 | 0.3938 |
−30 | 0.3870 | 0.3202 | 0.3013 | 0.2937 | 0.2899 | 0.2876 | |
0 | + 30 | 0.6247 | 0.4869 | 0.4391 | 0.4173 | 0.4057 | 0.3988 |
−30 | 0.4554 | 0.3559 | 0.3208 | 0.3048 | 0.2963 | 0.2913 | |
0.2 | + 30 | 0.6329 | 0.5339 | 0.4689 | 0.4366 | 0.4183 | 0.4071 |
−30 | 0.5038 | 0.3882 | 0.3419 | 0.3185 | 0.3053 | 0.2972 | |
0.4 | + 30 | 0.6203 | 0.5748 | 0.4973 | 0.4566 | 0.4325 | 0.4172 |
−30 | 0.5333 | 0.4135 | 0.3609 | 0.3323 | 0.3151 | 0.3041 |