【作者】 李跃飞；

【导师】 商立群；

【作者基本信息】 西安科技大学 ， 电力系统及其自动化， 2010， 硕士

【摘要】 随着电力电子技术的发展和工业自动化水平的提高,电力系统中整流器、变频调速装置、电弧炉等非线性负载越来越多,由此给电网带来的谐波公害越来越严重,对电力系统安全、稳定、经济运行带来了极大的威胁。本文针对10kV电网的谐波污染情况,研究一种混合型有源电力滤波器进行谐波污染治理,这种混合型装置由无源滤波器和常规有源滤波器共同组成,其中绝大部分谐波由无源滤波器进行补偿,而有源滤波器则起到遗失补缺的作用,并改善无源滤波器的性能,防止其与电网发生并联谐振。本文在分析混合型有源滤波器基本原理的基础上,阐述了混合型有源电力滤波器相对于常规有源滤波器的技术优势;在深入分析瞬时无功功率理论的基础上,采用基于瞬时无功功率理论的i p? iq算法作为本文的谐波电流检测算法;对比分析了三角波比较控制法、滞环比较控制法和定时比较控制法的优缺点,决定采用三角波比较法来进行谐波补偿电流跟踪控制。并应用MATLAB7.0仿真工具箱Simulink对检测和控制方法进行了仿真研究,证明了基于瞬时无功功率理论的i p? iq谐波电流检测算法和三角波比较控制策略的实时性、可行性。最后运用MATLAB7.0/Simulink对混合型有源电力滤波器进行整体仿真研究,仿真和计算结果证明了该混合型有源滤波器可以基本消除电网电流谐波,谐波抑制效果相对明显、有效,能够满足10kV电网的谐波治理需要。更多还原

【Abstract】 With the rapid development of power electronic technology and improvement of automation level in industry, more and more non-linear loads such as converter, variable speed drivers, arc furnace, etc, bring the serious harmonic contamination, It has brought a great threat for power system operation of security, stability and economic.In this paper, for the harmonic pollution of 10kV power grid, a parallel hybrid active power filter is proposed based on preventing harmonic currents. It consists of passive filter and active power filter. Passive filter compensates a majority of harmonic currents. Active power filter only compensate a few harmonic current and prevent harmonic resonance.The basic principle of active power filter are analyzed in this paper. Some methods of harmonic measurement are compared, i p? iq method based on the instantaneous reactive theories are choosed to use. The advantage and disadvantage of the triangular carry wave control and hysteresis-based current control are analyzed and discussed, the triangular carrier waveform control method are choosed. Based on MATLAB7.0/Simulink, the detection and control method are studied. The simulation results confirm the feasibility of the theories analysis.Finally, the parallel hybrid active power filter system are studied through the simulation by using MATLAB7.0/Simulink. The simulation and calculation results demonstrate that the effect of harmonic suppression is obvious and effective. Meanwhile, the parallel hybrid active power filter enables to meet the need of 10kV power grid harmonic elimination.更多还原