毕业论文关键词：有源电力滤波器 两电平 d-q检测
Design of active power filter in power system
In recent years,with the development of power system, the nonlinear system in the power grid is increasing, so a lot of harmonics are generated.Based on this, people needs to make a big breakthrough in Eliminating harmonics and compensating reactive power.The traditional passive filter has its own defects, which makes the active power filter has been developed rapidly. Therefore, in order to meet the requirements of harmonic control and reactive power compensation, the article designs a kind of active power filter based on two level inverter circuit.The main work of this article includes:
(One) The background and significance of APF are studied,and the development of active power filter is introduced..
(Two) Analyzing the basic working principle of the active power filter and introducing the development of it.
(Three) Telling the harmonic detection algorithm of instantaneous reactive power method, which includes the launch of P-Q method, IP IQ method and d-q synchronous rotating coordinate axis method. The d and q synchronous rotating coordinate axis method is adopted in the article .
(Four) introducing two methods in current tracking control circuit,and the Triangular wave comparison method is adopted in the article.
(Five)using MATLAB simulation to monitor the grid voltage waveform, load waveform and APF compensation effect.
Keywords: Active power filter two-level d-q detection
2 三相有源滤波器 8
2.1 APF主电路 8