【作者】 陈少军；

【导师】 付周兴；

【作者基本信息】 西安科技大学 ， 电力系统及其自动化， 2009， 硕士

【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。各种非线性和时变性电子装置的大规模应用,由此带来的谐波和无功问题也日益严重,对电力系统安全、稳定、经济运行带来了极大的威胁。用有源电力滤波器抑制谐波和补偿无功已经成为电力电子技术中的一个重大研究课题。本文分析了传统并联型有源电力滤波器的工作特性,针对其不足之处,设计了一种简化的三相并联型有源电力滤波器,并对此拓扑的工作原理、数学模型和补偿特性进行了较深入研究,此外还推导出并联型有源电力滤波器主电路参数的选取原则和方法。其主要特点:一是在基于瞬时无功功率理论的基础上,提出一种新的检测方法,检测谐波和无功电流的改进算法;二是详细分析了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,补偿电流跟踪控制选用三角波比较控制法,对直流侧电压采用PI闭环控制。本文对并联型有源电力滤波器进行了系统的仿真,取得了满意的结果。仿真结果验证了本文提出的并联型有源电力滤波器的谐波检测算法和控制策略的正确性和有效性。最后完成了以TMS320F2812DSP为控制核心的并联型有源电力滤波器系统的硬件和软件设计,对系统的软硬件各部分的结构和功能分别作了详细的阐述。更多还原

【Abstract】 With the development of modern industrial technology, much non-linear load emerging in power system. As harmonic and reactive power problems ,generated by a variety of non-linear and time-varying electronic device, become increasingly serious as they are widely used ,which lead to great threat of power system security, stability, economic operation. active power filter with harmonic suppression and reactive compensation for power electronics technology has become a major research topic .The compensation principle of the traditional shunt type active power filter is discussed,which can show that it is only used to compensate the harmonic current source.Considering the weakness, the investigated subject of the project is proposed,which is a simplified shunt type active power filter. The operating principle,mathematical modeling and the compensation characteristics of the subject are discussed in detail. In addition,the determination method of the main is deduced. Its main features: First, based on the instantaneous reactive power theory, A new detection method—hamonic current detection and reactive current detection method—is introduced in this thesis; Second, shunt active power filter’s control strategy including compensatory current control and DC voltage control is analyzed in detail. Compensatory current control adopts triangle wave compare control, and DC voltage control adopts PI closed loop control.The thesis makes the simulation for shunt active power filter system, The proposed harmonic , reactive current detection method and the control strategy of shunt active power filter are tested, Satisfactory result is drawn. The simulation results verify validity and effectiveness of the current detection method and the control strategy.The thesis introduces shunt active power filter system’s hardware and software design with TMS320F2812 DSP. Hard and software’s structure and function are described in detail.更多还原