基于最优控制策略的双馈水轮发电机组稳定性分析  

Stability analysis of hydroelectric generating units with doubly fed induction generators based on the optimal control strategies

作　　者：李辉[1] 杨顺昌[2] 

机构地区：[1]重庆大学高电压与电工新技术教育部重点实验室,重庆大学电气工程学院重庆400044 [2]重庆大学电气工程学院,重庆400044

出　　处：《水力发电学报》2005年第1期83-87,共5页Journal of Hydroelectric Engineering

摘　　要：为了分析可调速双馈水轮发电机组的静态稳定性 ,针对变速恒频双馈发电机的运行特点以及水轮机的刚性水击模型 ,本文推导了可调速双馈水轮发电机组的小扰动线性数学模型。以最优控制理论为基础 ,应用最小误差激励法比较了不同状态变量的线性反馈控制的系统稳定性和静、动态性能指标。分析结果表明 ,选择机组的有功功率、无功功率、转速和导叶开度的反馈控制具有较好的系统静态稳定性和控制效果。最后 ,以上述状态变量的反馈控制为实例 ,详细分析了系统参数变化对双馈水轮发电机组静态稳定性的影响。In order to analysis static stability of adjustable speed of hydroelectric generating units with doubly fed induction generators (DFIG), based on the operation characteristics of variable speed constant frequency DFIG and the rigid water hammer model of hydro-turbine, the small perturbation linear state models of this hydrogenerating units are derived in this paper. Based on the optimal control strategies, the stability of hydrogenerating units and static, dynamic performances of different state variables feedback linear control strategies are compared by using the minimal error excitation methods. It is shows that the state variables feedback strategy of active power, reactive power, speed and water valve appears good static stability and control performance. Finally, by using this state variables feedback linear control strategy, the static stability of adjustable speed hydroelectric generating units with DFIG is carried on and analyzed in detail with system parameter variation.

关 键 词：电机电工 双馈发电机 水轮发电机组 静稳定性 最优控制策略 

分 类 号：TM301.2[电气工程—电机]