【作者】 罗欢；

【导师】 刘开培；

【作者基本信息】 武汉大学 ， 电力电子与电力传动， 2004， 硕士

【摘要】 随着电力电子装置的飞速发展与广泛应用，电网中的谐波污染也日趋严重，各种基于电力有源滤波器的谐波抑制和无功功率补偿方法层出不穷，有源滤波器具有实时性和准确性的工作特点，如果再结合信号处理和控制技术等学科的优点，就可在实现对有源电力滤波器功能优化的同时，提高有源电力滤波器的性能。目前应用于有源滤波器的功率理论有很多种，无论从电路实现、计算量、物理意义以及公平对等意义上而言，Fryze时域功率理论都有着其独特的优势所在。 本文首先从Fryze时域功率定义法入手，分别讨论了应用于单相和三相电路的时域功率理论，并且对广义无功电流进行了分解，同时介绍了以此功率理论为基础发展形成的FBD功率理论体系。 本文提出了均值滤波器的有功电流实时检测方法，该滤波器为一具有线性相位的有限冲激响应(FIR)数字滤波器，可以使得应用于三相电路的控制系统在三分之一个周期处就跟随电网的变化，单相电路的控制系统在一个周期处就跟随电网的变化；为了进一步提高检测的动态响应，引入电流检测量作为反馈量，在理论分析的基础上，本文对该方法进行了仿真，仿真结果表明反馈环节的加入可以将动态过程缩短三分之二，缩短到半个周期。 最后，基于以上方法的研究，在DSP检测装置中对其进行了实验验证，实验表明了以上各种方法的仿真结果的正确性。更多还原

【Abstract】 With the development abroad application of the electric power electron equipments, the harmonics pollution in the electric power net is more serious day by day. All kinds of methods based on the active filter to restrain the harmonics and to compensate the reactive power emerge in endlessly. Active filter having real-time and veracity, taking advantage of the virtue of the signal processing and controlling technology, not only optimize the function of the active filter but improve the performance of the active.The thesis starts with the Fryze time-domain power definition, discusses the time-domain power theory applied to the single-phase and three-phase circuits. Then it decomposes the generalized reactive current. Recommend the FBD power theory system based on the Fryze time-domain power theory.The thesis puts forward an active current detection based on the mean filter. The filter is a finite impulse response (FIR) digital filter. It makes that the control system can follow the power system after three-one period in three-phase system, one period in single-phase system. To advance the dynamic response ulteriorly, the thesis takes the output as the feedback. The result is that the dynamic response is shorten to two third of the period.At last, the correctness and validity of these proposed measurement approaches put forward by the thesis are clearly shown by the simulation studies and the experiments.更多还原