三相四线并联型有源电力滤波器的仿真研究【毕业设计】.docVIP

摘 要 随着电力电子装置大量的应用到生产生活当中，它们使电能的转换应用变得更加容易，但同时也给电力系统带来了严重的谐波污染。目前，并联有源电力滤波器(shunt active power filter，SAPF)已成为无功和谐波动态补偿的有效手段之一。在三相四线制电力系统中除了无功和谐波需要治理，负载不平衡问题也变得日益突出，因此，本文研究与设计适用于三相四线制下的SAPF来解决这些问题。 针对三相四线制SAPF谐波电流检测问题，本文详细的推导基于瞬时无功理论的算法，论证它无需改进即可直接应用到三相四线制系统里；选择了滞环比较法作为补偿电流的控制策略；采用了桥臂变流器作为主电路 文章的最后，利用 MATLAB/Simulink 软件，搭建了仿真平台，对主电路出线电感参数和软启动方案进行单独仿真分析，证明电感值参数选择的合理和软启动方案可行。对 SAPF 和所要补偿的系统进行了整体仿真，结果证明在所选参数下，能够对平衡和不平衡非线性负载所带来的谐波有很好的动态补偿效果，对不平衡负载有很好的平衡作用；进而也说明检测方法正确，控制策略得当。 关键词 谐波动态补偿；并联有源电力滤波器；三相四线制；算法 MATLAB/Simulink Abstract With extensive application of power electronic devices in production and life,they make power energy conversion and application easily, but also lead to the serious harmonic pollution in the power system. At present, the shunt active power filter (SAPF) has been an effective way to dynamically compensate reactive power and harmonic. In addition to these problems, the load unbalance is more and more serious in three-phase four-wire system, therefore, SAPF applied to three-phase four-wire system is researched and designed to solve these problems in this paper. For the harmonic current detection of SAPF in three-phase four-wire system, thealgorithm based on the instantaneous reactive theory is detailedly derived, and this algorithm is demonstrated it could be directly applied to three-phase and four-wire system without being improved. Hysteresis-band comparison method is chosen as compensation current control strategy. The three-leg converter which has clear division is adopted as the main circuit. At the end of the paper, the simulation platform is built by use of MATLAB/Simulink software. The output inductance parameter and soft-start scheme are simulated respectively. The results prove that output inductance parameter is reasonable and the soft-start scheme is feasible. Then, the integrated simulation for SAPF and compensation system is carried out. Finally, simulation results show that SAPF has a good compensation characteristic fo