首页 | 本学科首页   官方微博 | 高级检索  
     

适应实际电网阻抗特性的DFIG不平衡电压解耦补偿技术
引用本文:年珩,王涛,程鹏.适应实际电网阻抗特性的DFIG不平衡电压解耦补偿技术[J].电力系统自动化,2015,39(23):49-57.
作者姓名:年珩  王涛  程鹏
作者单位:浙江大学电气工程学院, 浙江省杭州市 310027,浙江大学电气工程学院, 浙江省杭州市 310027,浙江大学电气工程学院, 浙江省杭州市 310027
基金项目:国家高技术研究发展计划(863计划)资助项目(2011AA050204)
摘    要:提出了一种利用双馈感应发电机(DFIG)补偿公共连接点(PCC)不平衡电压的方法。在DFIG负序数学模型基础上,使用基于电网阻抗观测的解耦控制器实现DFIG对PCC负序电压交、直轴分量的解耦控制,确保DFIG系统在任意电网阻抗比下具有优良的负序电压补偿性能。详细介绍了该方法的设计思路,推导了使用该方法的DFIG系统的闭环传递函数,通过研究电网阻抗比变化时系统闭环极点的轨迹分析了所提不平衡补偿方法的稳定运行能力,并分析了所提方法对电网阻抗动态变化及阻抗估计误差的适应能力。搭建了Simulink仿真模型,对比分析了所提解耦补偿方法与传统不解耦补偿方法的控制性能。最后,搭建了单机实验平台,实验结果证明了所提补偿方法的有效性和相比不解耦补偿方法的优越性。

关 键 词:双馈感应发电机    不平衡电压补偿    电网阻抗    解耦控制    阻抗比
收稿时间:2015/3/24 0:00:00
修稿时间:2015/11/3 0:00:00

An Unbalanced Voltage Decoupling Compensation Technique for DFIG Adaptive to Grid Impedance
NIAN Heng,WANG Tao and CHENG Peng.An Unbalanced Voltage Decoupling Compensation Technique for DFIG Adaptive to Grid Impedance[J].Automation of Electric Power Systems,2015,39(23):49-57.
Authors:NIAN Heng  WANG Tao and CHENG Peng
Affiliation:College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China,College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China and College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Abstract:A compensation strategy using doubly-fed induction generator (DFIG) to rebalance the voltage at point of common coupling (PCC) is proposed. By tuning the decoupling controller based on the estimated network impedance, d-q components of the negative sequence voltage at PCC is decoupling controlled, which gives the DFIG system good stability and fast response under arbitrary network impedance ratio. The design principles of the proposed strategy is introduced in detail, then the closed loop transfer function of a DFIG system utilizing the proposed strategy is derived, and the loci of the closed loop poles with varying network impedance ratio are plotted, with which the impact of the network impedance estimation error on the system performance is analyzed. Simulation model is built to compare the control performance of the traditional non-decoupling strategy and the proposed decoupling strategy. Finally, experiments on a prototype validate the effectiveness and superiority of the proposed strategy. This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2011AA050204).
Keywords:doubly-fed induction generator (DFIG)  unbalanced voltage compensation  grid impedance  decoupling control  impedance ratio
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《电力系统自动化》浏览原始摘要信息
点击此处可从《电力系统自动化》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号