【作者】 马惠；

【导师】 陈维荣；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2004， 硕士

【摘要】 非线性负载和各种换流设备的应用，对电力系统的谐波“污染”是十分严重的，补偿电力系统谐波，改善供电质量成为迫切需要解决的问题。二十世纪八十年代瞬时无功功率理论的提出，为解决谐波电流实时检测问题提供了有效的解决方法，随着传统LC滤波器固有缺陷的日益突出和电力电子技术的飞速发展，采用有源电力滤波器动态抑制谐波成为重要的发展方向。在我国有源电力滤波器的研究和开发尚处于起始阶段，至今还没有大容量有源电力滤波器的成熟产品问世，因此进行有源电力滤波器的研究和开发工作具有非常重要的意义。 影响有源电力滤波器性能的两个关键环节是谐波电流检测环节和电流跟踪控制环节：本文讨论了基于瞬时无功功率理论的谐波电流检测方法，根据基于i_p、i_q运算方式的谐波电流检测法在三相三线制电路中的应用提出了它在三相四线制电路中的具体应用方案，数学分析证明了该电流检测方法的正确性；本文针对目前广泛采用的两种电流控制方法，提出了改进的三角波脉宽调制电流控制方法和滞环电流矢量控制方法，理论分析和仿真结果证明了改进的电流控制方法的有效性和优越性。 为了验证有源电力滤波器控制方法的正确性，并加深对其控制规律的认识和理解，本文用MATLAB／SIMULINK中的电力系统模块SimPowerSystems Blockset对有源电力滤波器进行了动态仿真研究。仿真结果表明，两种改进的电流控制方法都能有效地滤除负载中的绝大部分谐波，并且与传统的控制方法性相比都有一定的优越性：有利于减小有源电力滤波器的损耗和容量；在相同的控制精度下降低功率器件的开关频率，提高了有源电力滤波器的综合性能。 本文的研究工作对有源电力滤波器实验系统的开发具有一定的指导和参考价值。更多还原

【Abstract】 For the wide application of the nonlinear loads and all kinds of converter equipments making the power system polluted with a mass of harmonic current, it is urgent to eliminate harmonic and improve power quality. The application of instantaneous reactive power theory provides the effective method of detecting harmonic current; and for the inherent shortcomings of LC filters and the development of power electronic technology, it is being an important way to eliminate harmonic dynamically by active power filters. In china, the studies and exploitations in active power filter is at its beginning stage, and large capacity mature producis have not been coming out yet, so the studies in active power filers have important significance.The two keys of harmonic current detecting and current tracking controlling have a great impact on the performance of active power filters. Therefore, this paper discusses the harmonic and reactive current detecting method based on the instantaneous reactive power theory and presents the harmonic and reactivecurrent detecting method based the ip - iq algorithm used in three-phasethree-wire circuits and three-phase four-wire circuits. The mathematics analysis and the simulation results examine the feasibility and validity of the current detecting method. Moreover, this paper puts forward the improved schemes of the two main current controlling methods: the improved triangle-wave linear current controlling method and the hysteresis current vector controlling method. The feasibility and superiority of the two improved current controlling methods is examined by dynamic simulation and theoretical analysis.To examine the validity of the controlling system of the shunt active power filter and understand the controlling rules furthermore, this paper simulates the shunt active power filter system with SimPowerSystems Blockset in MATLAB/SIMULINK. The simulating results show that the two improvedcurrent controlling methods can filter a majority of the load harmonic current, and they have superiorities to the traditional methods: reducing the capacity and the power loss of the active power filter easily; and decreasing the switching frequency within the controlling precision to improve the performance of the active filter.The studies in this paper have some guidance on the exploitation of the active power filter experimental system.更多还原