相线制并联型有源电力滤波器的设计与研究.docVIP

三相三线制并联型有源电力滤波器的设计与研究 摘要 随着现代工业技术的发展，电力系统中非线性负荷大量增加。各种非线性和时性电子装置大规模地应用，造成电能质量恶化。电力有源滤波器以其优越的补偿性能，已成为电力电子技术领域的研究热点之一。而其中并联型有源电力滤波器过去和将来都将占据重要地位。 本文重点研究三相三线制并联电压型有源电力滤波器。有源电力滤波器的两大关键技术是谐波与无功电流的检测和补偿电流控制。实时、准确地检测出电网中瞬态变化的谐波与无功电流是有源电力滤波器进行精确补偿的前提。目前有多种谐波与无功电流检测方法，其中，基于瞬时无功功率理论的检测法是三相系统中应用最为广泛的一种方法，包括适用于对称无畸变电网的p-q法及适用于不对称有畸变电网的ip-iq法和d-q法。补偿电流的控制方法是实现有源电力滤波器功能的核心环节，它负责控制有源电力滤波器产生预期的补偿电流。本文详细分析了并联型有源电力滤波器的控制策略，包括补偿电流跟踪控制和直流侧电压控制。通过分析和比较滞环控制、三角波控制和基于空间矢量的电压控制方法，最后确定补偿电流跟踪控制选用三角波比较控制法和滞环控制方法。 最后,为了验证所提出的检测方法和控制方法的正确性，本论文用MATLAB6.5/SIMULNIK下的电力系统模块Simpowersystems Blockset对整个三相三线制并联电压型有源电力滤波器系统进行了仿真研究。仿真结果表明本文所设计的滤波器可以很好的滤除谐波，完成抑制谐波的作用。 关键词:有源电力滤波器;谐波与无功电流检测:补偿电流控制;三角波比较和滞环控制；仿真 The design and research of Three-phase and three-wire System Shunt Active Power Filter Abstract With the development of modern industrial technology，a large number of nonlinear loads in power systems to increase. Various nonlinear and time-scale application of electronic devices, caused power quality deterioration . Active power filter with its superior compensation performance. has become one of hot Research focus on power electronics technology area. The thesis mainly considers three-Phases and three-wire system shunt active. power filter. The two key technologies are harmonic and reactive currents detection ,and compensation currents control.Exact and real-time detection of the instantaneous variable harmonic and reactive current in power system is the premise for compensation of active power filter. At present，there are many detection methods concerning harmonic and reactive current，in which，the method based on instantaneous reactive power theory is used widely in three-phase system than others，and it consists of p-q detection method applied to symmetry power system without distortion，ip- iq detection method and d-q detection method applied to asymmetry distortion power System. Control method for compensation current is the key tache to accomplish the various functions of active power filter t