状态指标

状态级别

系统运行状态

$\left|\text{d}f/\text{d}t\right|\le \epsilon$

$\left|\Delta v\right|\le k_1{U}_N\cap \left|\Delta f\right|\le k_2{f}_N$

I

良好状态

$\Delta v<-k_1{U}_N\cup \Delta f<-k_2{f}_N$

II

系统重载

$\Delta v>k_1{U}_N\cup \Delta f>k_2{f}_N$

III

系统轻载

$\left|\text{d}f/\text{d}t\right|>\epsilon$

/

IV

非健康状态