With Grid Active Filtering Technology Research And Engineering Applications

Taking the harmonic attenuation of the power distribution network at Zaoyuan 220KV substation as the object of study, this dissertation aims to do research on the control strategies and its industrial application technologies for eliminating harmonic in medium and high voltage power network, prepare theory and technological knowledge for its universal application in our country, and accumulate experiences for its high-voltage and high-power application.The study is focused on HAPFIS-Hybrid Active Power Filter with Injection Structure, a novel facility for substation harmonic elimination. This dissertation expands the structure, the principle and control of HAPFIS, as well as the designation of passive filter and high-power inverter, which presents a self-contained solution for substation harmonic elimination.Firstly, after the comparison of the existing active power filters, a novel HAPFIS is proposed here to meet the given situation of substation harmonic elimination. Then, based on the analysis of control strategies of HAPF, the improved Proportional-Integral Control strategy and modified regular-sampling technique are proposed. Finally, the Substation Harmonic Analysis and Elimination System based on HAPFIS is established with detailed realization.This project is funded by National Science-Tech Tackle Key Project, 'Research on Active Power Filter for Power Harmonic Eliminating' (NO.2002BA218C) and Hunan Power Corp. Science-Tech Tackle Key Project, 'Research on Engineering Application of Power Harmonic Eliminating' (No. [2001]772) . The production of the project is listed as one of the new important products in China[2003ED770013].