基于轨迹灵敏度分析的直流调制参数优化设计  

Parameter Optimization Design of DC Modulation Based on Trajectory Sensitivity Analysis

作　　者：王长香[1] 房大中[1] 薛振宇[1] 魏文辉[2] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]中国电力科学研究院,北京100192

出　　处：《电力系统及其自动化学报》2012年第4期30-35,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(50777046);国家重点基础研究发展计划(973)资助项目(2009CB219700)

摘　　要：提出一种基于时域仿真的直流调制参数优化方法,将直流调制参数优化问题转化为带参数约束的非线性优化问题。该方法,首先将约束优化问题转化为无约束优化问题,通过轨迹灵敏度仿真得到目标函数的梯度信息,应用拟牛顿法(DFP)优化直流调制控制器参数。由于目标函数反映了AC/DC复杂系统的动力学特性,该方法可有效地改善系统的阻尼特性,抑制大扰动引起的系统振荡。在IEEE四机系统上进行的特征值分析和时域仿真结果验证了该方法的有效性和鲁棒性。A method for parameter-optimization of DC-modulation controller on the basis of time domain simulation has been proposed in this paper. In this method, the parameter optimization problem of DC-modulation controller is converted to the non-linear optimization problem with parameter constraint, and then the con- strained optimization problem has been converted to the unconstrained optimization problem. The gradient in- formation of objective function is obtained by means of the simulation of trajectory sensitivity, and then the pa- rameters of DC-modulation controller are optimized by Quasi-Newton Algorithm （DFP）. Because the objective function reflects the power oscillation behavior of AC/DC interconnected power systems, the proposed method can be used to effectively damp the power oscillations of AC/DC system incurred by severe disturbances. The eigenvalue analysis and time domain simulations on the IEEE 4-generator AC/DC system verify the effectiveness and robustness of the proposed method.

关 键 词：直流调制 轨迹灵敏度 拟牛顿法 参数优化 

分 类 号：TM712[电气工程—电力系统及自动化] TM743