户用小型风力发电系统的并网运行控制  

Control strategy for grid-connected household wind power generation systems

作　　者：何胜[1] 孙旭东[1] 柴建云[1] 翟庆志[2] 

机构地区：[1]清华大学电机工程与应用电子技术系,电力系统及大型发电设备安全控制和仿真国家重点实验室,北京100084 [2]中国农业大学信息与电气工程学院,北京100083

出　　处：《清华大学学报（自然科学版）》2009年第4期477-480,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"十一五"科技支撑项目(2006BAJ04B03);台达电力电子科教发展计划项目

摘　　要：为了克服独立运行的小型风力发电系统的缺点,节约电能,提出了一种与电网并联运行的户用小型风力发电系统的结构及其控制策略。该系统的并网部分由一个不控整流桥、Boost变换器和一个单相并网逆变器组成,采用"并网不上网"的运行方式。对Boost变换器进行控制,实现风力机的最大功率跟踪;并网逆变器采用以电流为内环、以电压为外环的双闭环控制方法,可与单相电网并联运行,但不对电网输出功率。通过不同风速、电网电压和负载下的系统仿真与单相逆变器并网实验,证明了系统控制策略的有效性。A control strategy was developed for a small household wind generation system connected with the electrical grid to overcome the shortcomings of conventional stand-alone systems and save energy. The system has, a diode rectifier, a boost DC/DC converter and a single-phase inverter in parallel with the grid to enable grid-connected operation without power injection. The boost converter is used to achieve maximum power point tracking （MPPT） control for the wind turbine, with a double-loop control method with a current loop and a voltage loop in the inverter so that the inverter does not feed any power into the grid. The effectiveness of the control strategy is verified by simulations for various operating conditions with various wind speeds, grid voltages and local loads and by parallel operating tests for the single-phase inverter.

关 键 词：风力发电 户用 并网不上网 单相逆变器 最大功率跟踪 

分 类 号：TM614[电气工程—电力系统及自动化] TM46