摘要
在多机系统多运行方式下,用非线性规划方法进行电力系统稳定器(PSS)参数优化时,特征根的稳定程度会随着参数的调整而不断变化,以致收敛过程中存在振荡现象。为减缓振荡,对非线性规划目标函数进行了改进,增加了优化过程中所计及的特征根数量,并根据各特征根的稳定程度选择相应的权重系数,大幅度减少了优化计算的迭代次数。在一个8机系统的算例上进行试算的结果表明,改进后的算法可有效改善迭代过程的收敛特性。
When the nonlinear programming approach is used to optimize parameters of power system stabilizer（PSS） under multiply operating conditions in a multi-machine system, eigenvalues stability degree will vary with parameter＇s adjusting. Due to this, there is oscillation phenomenon in the convergence process. To weaken the phenomenon, the objective function of the optimization problem is modified, and the eigenvalue number considered in the optimization process is increased. The weighting coefficients are selected according to the stabilization degree of eigenvalues, and the computational requirement is greatly reduced. Testing computation based on an eight-machine system shows that the convergence property is largely improved.
出处
《现代电力》
2008年第4期25-30,共6页
Modern Electric Power
关键词
特征根
非线性规划法
电力系统稳定器(PSS)
参数优化
权重系数
eigenvalue
nonlinear programming method
power system stabilizer （PSS）
parameter optimization
weighting coefficient
