基于轨迹灵敏度分析的电力系统稳定器参数优化设计

TUNING OF PSS PARAMETERS USING OPTIMIZATION APPROACH BASED ON TRAJECTORY SENSITIVITYANALYSIS

提出了一种基于时域仿真的电力系统稳定器(PSS)参数优化方法。该方法将 PSS 的参数设置归结为优化问题首先通过轨迹灵敏度仿真得到目标函数的梯度信息,再应用共轭梯度技术优化多个 PSS 参数。由于在目标函数中考虑了电力系统大扰动中的非线性特征,该方法可以抑制小扰动引起的自发性振荡及有效阻尼大扰动引起的系统振荡。在两个IEEE典型系统上进行的特征值分析及时域仿真结果验证了该方法的实用性和有效性。

The authors proposed a PSS parameter setting method based on time-domain simulation. This method formulated the turning of PSS parameters as an optimization problem, firstly, the gradient information was obtained by means of the simulation of trajectory sensitivity, then the PSS parameters were optimized by conjugate gradient method. Because in the objective function the nonlinear features during power system severe disturbance were considered, so the proposed method could be used to inhibit the spontaneous oscillation caused by small disturbance and to effectively damp the system oscillation caused by severe disturbance. The results of eigenvalue analysis and time-domain simulation on two typical IEEE test systems verify the practicality and effectiveness of the proposed method.