西藏电网暂态稳定分析的动态负荷模型及发电机参数等值  

Dynamic load model and equivalent generator parameters for transient stability analysis of Tibet power grid

作　　者：田位平[1] 唐文龙[1] 赵云明[1] 

机构地区：[1]西藏农牧学院电气工程学院,西藏林芝860000

出　　处：《河海大学学报（自然科学版）》2013年第6期548-553,共6页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金(51067008/E0704)

摘　　要：提出适用于西藏电力系统暂态稳定分析的广义实用负荷模型,并给出等值同步发电机参数。利用线性前馈网络连接权与差分方程负荷模型系数的映射关系,对西藏特殊电力负荷的差分方程参数进行辨识,在线性前馈网络算法中提出为了避免在极值点附近出现振荡现象,对初始权值搜索应满足的条件。比较了线性前馈网络和线性规划方法辨识差分方程的输出响应特性,表明线性前馈网络参数辨识的负荷模型内插能力优于线性规划方法,两种方法的外推能力基本一致。通过算例验证了用综合性质的差分等值动态负荷模型代替等值静态负荷和感应电动机模型的有效性。This paper presents a practical generalized load model for transient stability analysis of the Tibet power system and provides equivalent synchronous generator parameters as well. The mapping relationship between linear back propagation connection weights and difference equation load model coefficients was used to identify the difference equation parameters of suitable load models for the Tibet power system. In order to avoid the oscillation phenomenon near the extreme points,the linear back propagation algorithm should meet the requirements of initial weights search. Comparison of the output response characteristics of the linear back propagation and linear programming methods for the difference equation shows that the interpolation ability of the load model parameter identification of linear back propagation is superior to the linear programming method,and the extrapolation ability of the two methods are basically the same. An example verifies that both equivalent static load models and induction motor models can be effectively replaced by equivalent comprehensive dynamic difference load models.

关 键 词：广义负荷模型 参数辨识 线性前馈网络 差分方程 模型有效性 西藏电力系统 

分 类 号：TM743[电气工程—电力系统及自动化]