改进的水轮机非线性模型及其对电力系统仿真分析的影响  

A Modified Nonlinear Hydraulic Turbine Model and Its Impact on Power System Simulation

作　　者：王曦[1] 李兴源[1] 刘俊敏[1] 黄睿[1] 丁理杰[2] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065 [2]四川电力科学研究院,四川省成都市610000

出　　处：《电网技术》2014年第6期1606-1610,共5页Power System Technology

基　　金：国家重点基础研究发展计划项目(973项目)(2013CB228204);国家863高技术基金项目(2011AA05A119);国家自然科学基金项目(51037003)~~

摘　　要：现有电力系统仿真软件通常采用理想模型模拟调速系统中水轮机动态行为,理想模型基于水轮机稳态方程在额定运行点线性化推导而得,难以适应电力系统不同工况不同故障下的仿真。基于水轮机广义基本方程式推导了改进的水轮机非线性模型,并通过锦屏一级电站机组一次调频实测数据验证了改进模型的准确性。该模型在保证简便的前提下,能有效提高水轮机模型的精度,适合在大型电力系统仿真中应用。为比较不同水轮机模型对于电力系统仿真的影响,以4机2区域系统为例进行了暂态仿真分析。结果表明,理想水轮机模型在分析电力系统暂态稳定和系统阻尼时仿真结果偏保守。The power system simulation software usually use ideal hydraulic turbine model in governor,the ideal model is the linearization of turbine steady state equation,it can hardly adapt to the various conditions and faults of power system.In this paper,a modified nonlinear model of hydraulic turbine is proposed based on basic turbine equations.The field test data of Jinpin Yiji plant verifies the validity of the proposed model.The model can greatly improve the accuracy under the condition of simplicity,so it is suitable to use the model in power system simulation.In order to compare the simulation results with different hydraulic turbine model,a 4-generator 2-area system is taken as example,the results show that the use of ideal turbine model may lead to a conservative result.

关 键 词：水轮机 调速系统 非线性 电力系统仿真 

分 类 号：TM721[电气工程—电力系统及自动化]