直驱风电系统双PWM变流器非线性控制策略  

Nonlinear Control Strategy of Dual-PWM Converter in Direct-drive Wind Power Generation

作　　者：马先芹[1] 王久和[1] 

机构地区：[1]北京信息科技大学自动化学院,北京100192

出　　处：《电力系统及其自动化学报》2013年第6期35-41,共7页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51077005);北京市高校创新能力提升计划项目(PXM2013_014224_000095);北京市教委科技发展计划面上项目(SQKM-201211232009);北京市青年拔尖人才培育计划项目(CIT&TCT201304111)

摘　　要：在直驱风电系统中,为了提高变流器的性能,该文提出了外环采用PI控制,内环采用无源控制的混合控制策略。根据主电路拓扑结构分别建立了在dq坐标系下的欧格-拉格朗日EL(Euler-Lagrange)模型和端口受控耗散哈密顿PCHD(port control Hamiltonian with dissipation)模型。基于EL模型,采用了注入阻尼的方法,得到无源控制律;而基于PCHD模型,采用能量成形的方法,利用IDA-PBC(injecting dampingpassivity-based contro)控制算法设计无源控制器。仿真结果表明机侧变流器能够实现对转速的控制;网侧变流器实现直流电压跟踪控制、单位功率因数并网。实验验证了所提控制策略的可行性。In order to improve the performance of the converter in direct-drive wind power system, a novel hybrid control strategy based on inner loop passive and outer loop PI was presented. According to the Topology of the power circuit, both EL and PCHD model were respectively established under dq coordinate. Based on EL model, the approach called inject- ing damping can be adopted to obtain the control law. While, based on PWM inverter, energy forming method based on PCHD model and the IDA-PBC control algorithm were adopted to design passivity-based controller. The simulation re- suits showed that PWM rectifier can achieve speed control. The grid-side inverter can realize voltage control at DC side and unity power factor at AC side. Finally, the control strategy was proved feasible by experimental results.

关 键 词：永磁同步电机 双脉冲宽度调制(PWM)变流器 无源控制 阻尼注入 端口受控耗散哈密顿 

分 类 号：TM315[电气工程—电机]