Study On Micro Detcetion And Suppression Of Harmonic

Micro power grid with its flexibility, intelligence and environmental protection is widelyattention, but the use of various kinds of power electronic devices in micro grid has brought alot of harmonic, threatens the safe operation of power system. Therefore, to realize real-timeaccurate detection and harmonic suppression, improve power quality, has important researchsignificance.This paper analyzes the basic structure of the micro-grid, power generation andmicro-harmonic generation principle and reason, on the basis of in-depth study of themicro-harmonic detection and suppression methods. First, analyzed the micro power gridharmonic detection and the micro grid harmonic suppression research status and the seriousdamage caused by the harmonic of power system.Secondly, studied the structure and basic power of micro grid principle, analyzes theharmonic source of photovoltaic power and wind power generation, Analysis of the microgrid access and the impact on the position of the traditional power grid harmonics generatedharmonic factors and micro power capacity, as well as its access to the relevant structures.Then, the paper analyzes the micro grid harmonic detection methods and the suppressionmethod, on this basis to determine the instantaneous reactive power based on improved ip-iq-harmonic detection algorithm, using micro grid energy storage system and the combinationof active power filter for harmonic filtering method.Finally, based on MATLAB instantaneous reactive power detection ip-iqmethod wasimproved by simulation, and analysis of simulation results show that micro grid energystorage systems and active power filter combinations is feasible, can effectively filter outharmonic, due to the addition of micro grid energy storage system save energy, implements ainverter a inverter functions has practical application significance.