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| 摘要: |
| 对励磁系统模型进行了研究,提出了一种新的励磁系统参数优化方法。为了使励磁系统满足性能指标的要求,实现最佳控制,采用了各种不同的控制目标准则。基于不同控制目标准则得出励磁系统参数优化模型,参数优化的目标函数是含多变量的复杂的非线性函数,且含有不等式约束。引入惩罚项将含约束优化问题转化为无约束优化问题,然后采用单纯形替换法求出可变参数全局最优解。以IEEE AC2型励磁系统标准模型为例,基于6种不同控制目标准则,采用约束多变量非线性规划方法,通过程序设计与模型仿真相结合对励磁系统参数进行优化。对小偏差信号作用下的励磁系统各种暂态响应指标进行比较分析,结果表明所提出的基于约束非线性规划的励磁系统参数优化的方法是有效、可行的。 |
| 关键词: 励磁系统,参数优化,约束非线性规划,目标准则 |
| DOI： |
| 分类号:TM761.11 |
| 基金项目: |
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| Parameter optimization of excitation system based on constrained nonlinear programming |
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WANG Yang-zheng JIANG Ping
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| Abstract: |
| Based on the study of excitation system model,a new method of excitation system parameter optimization is proposed.Various control criterions are proposed to meet the performance indexes for excitation system and realize the optimal control.The parameter optimization math models of excitation systems are deduced according to the various control criterions,and the objectives are multi-variable nonlinear functions with inequation constraints.The optimization with constraints is transformed into the optimization without constraints by adding the punishment term.The global optimal result is then obtained by using the Nelder-Mead simplex method.Using model simulation and procedure design,parameters of IEEE AC2 excitation system standard model,as an example,are optimized by constrained multi-variable nonlinear programming according to six control criterions.The transient response indexes of excitation system to small error signal are analyzed and results show that the proposed parameter optimization method is feasible and effective. |
| Key words: excitation system,parameter optimization,constrained nonlinear programming,control criterion |
