变速变桨距风力发电系统的逆系统控制器性能评估  

Performance Verification of An Inverse-system Controller for Variable-speed Variable-pitch Wind Generator

作　　者：耿华[1] 周宏林[1] 周伟松[1] 杨耕[1] 

机构地区：[1]清华大学

出　　处：《电力电子》2008年第2期45-49,共5页Power Electronics

摘　　要：基于风机模拟实验平台,本文验证了作者提出的用于风力发电系统桨距角控制的逆系统控制器的性能。由于系统动态呈典型的非仿射非线性特性,该控制器根据逆系统控制理论的相关方法,直接使用风力机制造商提供的数据对呈非线性的风机特性进行建模,通过多时间尺度方法将模型转化为具有非仿射型非线性特性的一阶动态系统,然后使用逆系统与之级联,使级联系统呈"伪线性"。同时,为消除参数不确定性、风速检测误差和发电机转矩扰动对系统输出功率的影响控制器中额外加入了鲁棒补偿器。风机模拟平台上的实验表明,相比传统PI控制器,ISC控制器能使系统输出功率更加稳定,并能降低浆距角的调节频率和减小其调节幅度,有利于降低系统机械疲劳。此外还具有结果简单,参数易整定的特点,易于在嵌入式控制器中实现。Applying a wind tin＇blue simulator, this paper presents the perfonrmance verification results of the inverse-System Controller （ISC） which was proposed by the authors recently for the pitch control of a Variable-Speed Variable-Pitch Wind Generator （VSVP-WG）. The controller synthesizes the ideas of two-time-scale approach and inverse-system method. Bussed on two-time- scale analysis, the model of VSVP-WG is reduced to a first-order one with non-affine and noniinear charaeteristics.Using the inverse-system method, the nonlinear model is further converted to a pseudo-linear one and then can be stabilized simply by linear system approach. With the robust compensator： turbine parameters uncertainties and over nonparametric perturbations. such as the generator torque disturbances and noise, are supressed. To verify the performance of ISC for pitch control, we embed the controller into a hardware- in-the-loop simulanon platform used for the control of VSVP-WG. Experiments show that compared with conventionalproportinal-integral controt, ISC can smooth the output power of the VSVP-WG and minimize the actuation duty circle. Besides, the structure of the ISC is very compact and parameters are easy to design, allowing the. controller to be easily implemented on a digital signal processor （DSP） in real applications.

关 键 词：风力发电 桨距角控制 逆系统控制 风机模拟平台 

分 类 号：TM315[电气工程—电机] TP336[自动化与计算机技术—计算机系统结构]