一种抑制超低频振荡的水电机组调速器参数协调优化方法研究

Ｒesearch on Governor Parameter Coordinated Optimization to Suppress ULFO for Hydraulic Turbine

摘要:

基于最小二乘法实现了在线拟合发电机机械转矩阻尼系数，可准确评估机组对超低频振荡的贡献度。同时 提出一种抑制超低频振荡方法，该方法首先对系统状态子空间进行辨识，并结合改进粒子群算法协调优化机组调速 器 PI 参数，实现了对超低频振荡的抑制。最后，利用 PSASP 软件在改进的 EPＲI 36 节点模型进行了仿真验证，结果表 明所提方法能有效抑制超低频振荡。

Abstract:

An effective method to evaluate contribution degree of ultra － low － frequency oscillation ( ULFO) for hydraulic turbine based on the least square fitting method is realized． And a suppression scheme for ULFO is presented． The state subspace representation is identified and governor parameters of hydraulic turbine are optimized by an improved particle swarm optimization． Finally，the effectiveness of the proposed suppression scheme for ULFO are verified with an improved EPＲI 36 － nodes system．