## ip-iq谐波检测算法设计及仿真

Design and Simulation of harmonic detection algorithm based on ip-iq
Abstract:Power theory of harmonic detection algorithm based on unconstrained, obtained by the power system network side of the three-phase power supply voltage and current value, with according to the instantaneous reactive power theory for three-phase coordinate transformation and fundamental frequency of grid synchronous rotating coordinate, then calculate the corresponding instantaneous power of numerical, with low pass filter obtained instantaneous power DC active component and DC reactive component again after Clark inverse transform obtained under three-phase static coordinate plane fundamental component and three-phase current and original value can be obtained harmonic component. The design analysis and discussion with no power theory of harmonic current detection of IP IQ algorithm in three-phase circuit instantaneous. This way, the need to use and a power grid phase voltage EA and phase of sinusoidal signal and the corresponding cosine, they consist of a PLL and a positive and cosine signal generating circuit to. According to the calculated IP, IQ could be according to the theory, after low-pass filters that IP, IQ of DC component, and through direct flow to calculate the fundamental current and original current difference would be fundamental current, and simulated by PSCAD, simulation results show that, IP IQ method under the condition of voltage distortion can also accurately detect the harmonic. 源\$自,六.维/论[文;网'www.lwfree.cn
Keywords: Voltage distortion, harmonic current detection, harmonic / simulation software.
目录

1 .绪论    5
1.1 本课题的背景    5
1.2 谐波的基本概念及谐波源    5
1.3 谐波的危害    8
1.4 谐波抑制    9
1.4.1 LC滤波器的基本原理和分类    10
1.4.2 APF基本原理和简单分类    10
1.5 课题意义    12
1.6 研究内容    12
2 瞬时无功功率理论和应用    14
2.1 三相电路瞬时无功功率理论    14
2.2 谐波和无功功率的实时检测    15
2.2.1  谐波检测    16
2.2.2 ip-iq(dq0)谐波检测    19
3 基于ip-iq谐波检测算法设计    23