【作者】 侯少海；

【导师】 张纯江；

【作者基本信息】 燕山大学 ， 电力电子与电力传动， 2009， 硕士

【摘要】 电网的非线性负载、感性负载等向公用电网注入大量谐波和无功功率,给公用电网的质量造成严重污染,既影响电力系统自身的正常运行,又对周围的通信系统和电子设备产生严重的干扰,因此消除谐波具有现实的实际意义。本文研究了并联型有源电力滤波器和无源滤波器并联的混合型电力滤波器。在论述混合型电力滤波器结构形式及发展现状基础上,首先分析了有源电力滤波器的工作原理,建立了并联混合型电力滤波器的数学模型和电路模型,对有源电力滤波器交、直流侧能量的传递进行了分析。在上述分析基础上,开展了基于电网电流控制的无谐波检测控制方式研究,通过d-q变换实现系统控制,同时分析了该控制方式与传统控制方式的等效性及其优点。开展了数字锁相技术,建立了三相锁相环的数学模型,并采用Matlab进行了仿真。设计了无源滤波器,并对只有无源滤波器、混合型电力滤波器进行了对比仿真研究。为了验证该控制方案的有效性,搭建了有源电力滤波器实验系统。系统包括三相逆变主电路、以DSP TMS320LF2407A为核心的控制电路、驱动电路、检测电路等几部分。进行了软件编程与调试,完成了锁相实验、三相逆变器并网实验、有源滤波器谐波补偿实验。仿真和实验研究结果表明,本文研究的无谐波检测的并联型有源电力滤波器能够起到补偿电流谐波的作用。更多还原

【Abstract】 Non-linear load, inductive load of the utility grid inject substantial harmonic and reactive power to grid, causing serious pollution to the quality of grid, not only affecting power system normal operation, but also having serious interference on surrounding communication systems and electronic devices. Thus the elimination of harmonics has real practical significance.This paper studies the hybrid power filter which is composed of shunt Active Power Filter and Passive Filter in parallel. After discussing the structure and development of hybrid power filter, it analyses the working principle of Active Power Filter. The paper sets up a Shunt Hybrid Power Filter mathematical model and circuit model. Also the analysis of process during the transmission between AC-side and DC-side in Active Power Filter is done.Based on the above analysis, the paper studies the control mode without harmonic detection based on the grid current, which realizes the control through dq transformation. Analysis of the equivalence of new control scheme and traditional ones is done. Afterwards Phase Lock Loop is studied Its math model is established and simulation has been completed by Matlab. Passive Filter is designed. The systems with passive filter and with hybrid power filter are compared by simulation studies.In order to verify the effectiveness of proposed control scheme, an experimental system is set up. The system includes three-phase inverter, control circuit which uses DSP TMS320LF2407A as the core, drive circuit, and so on. Software programming and debugging is completed, as well as the Phase Lock Loop experiment, connecting to grid experiment and compensation experiment.Simulation and experimental results show that the proposed Shunt Active Power Filter without harmonic detection can compensate harmonic current.更多还原