并联混合型有源滤波器的研究

发布时间：2018-12-14 01:42

【摘要】：随着电力系统规模的不断扩大以及大量非线性电力电子装置的广泛应用,使电网受到越来越严重的“谐波污染”,因而对谐波的治理迫在眉睫。将无源滤波器和有源滤波器相结合构成的混合型有源电力滤波器(Hybrid Power Filter,HAPF),有助于减少谐波补偿系统的投资成本,还可以提高补偿系统的性价比,从而达到较好地抑制谐波的目的。所以对混合型有源电力滤波器系统的研究具有重要的现实意义。针对谐波问题,本论文首先在分析比较了各种滤波器的优缺点的基础上,提出采用并联型混合型有源滤波器(HAPF)进行谐波补偿,并对其中的无源滤波器部分进行了设计。其次,针对传统的基于瞬时无功功率理论的i_p -i_q谐波电流检测算法产生的延迟问题,本文在传统算法基础上提出了一种新的i_p - i_q算法。该算法通过增加补偿角,对检测过程产生的延时做出一定的补偿,采用MATLAB仿真软件对这两种算法进行比较,结果表明新算法消除了检测过程产生的延时,具有较好的补偿效果。再次,在对各种电流跟踪控制方法进行分析比较后,本文选用滞环比较控制方法。最后,对只投入有源电力滤波器和投入并联混合型有源电力滤波器的滤波效果分别进行仿真分析,结果表明并联混合型有源电力滤波器能实时地对谐波进行补偿,使整个系统的电流波形基本为正弦波形,谐波补偿效果显著。因此,本文采用的并联型混合型有源电力滤波器(HAPF)对电力系统谐波是一种有效的、可行的补偿装置。
[Abstract]:With the continuous expansion of power system scale and the extensive application of a large number of nonlinear power electronic devices, the power network is subjected to more and more serious "harmonic pollution", so it is urgent to treat harmonics. The hybrid active power filter (Hybrid Power Filter,HAPF), which combines passive filter and active power filter, can reduce the investment cost of harmonic compensation system and improve the performance / price ratio of the compensation system. In order to achieve a better purpose of harmonic suppression. Therefore, the study of hybrid active power filter system has important practical significance. Based on the analysis and comparison of the advantages and disadvantages of various filters, this paper proposes a parallel hybrid active power filter (HAPF) for harmonic compensation, and designs the passive filter. Secondly, in order to solve the delay problem caused by the traditional IP-iac harmonic current detection algorithm based on instantaneous reactive power theory, this paper proposes a new IP-IQ algorithm based on the traditional algorithm By increasing the compensation angle, the algorithm compensates the delay generated by the detection process to a certain extent, and compares the two algorithms with the MATLAB simulation software. The results show that the new algorithm eliminates the delay generated by the detection process and has a better compensation effect. Thirdly, after analyzing and comparing various current tracking control methods, hysteresis comparison control method is used in this paper. Finally, the filter effect of only active power filter and shunt hybrid active power filter is simulated and analyzed. The results show that shunt hybrid active power filter can compensate harmonics in real time. The current waveform of the whole system is sinusoidal, and the harmonic compensation effect is remarkable. Therefore, the parallel hybrid active power filter (HAPF) used in this paper is an effective and feasible compensation device for power system harmonics.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN713.8

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