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Research on Active Power Filter for Comprehensive Elimination of Heavy Harmonic

Author: ZhouBenDuo
Tutor: JieDa
School: Shanghai Jiaotong University
Course: Electrical Engineering
Keywords: power system active power filter harmonic comprehensive elimination
CLC: TN713.8
Type: Master's thesis
Year: 2009
Downloads: 99
Quote: 1
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Abstract


More and more nonlinear load has been connected to the electric grid due to the development of power electronic technology and its wide application in industry. This kind of load has very serious nonlinear electrical characteristics which can increases harmonic components in power system, and it not only pollutes power utilization environment but also threatens electric equipment. To solve the problem lots of research has been done to restraint and eliminate electric harmonic. So far installing electric filter to the system is an important method to eliminate harmonic. There are two kinds of filter for harmonic elimination: passive electric filter and active power filter, APF for short. APF has been more and more widely used in power system harmonic treatment because of its advantages, like high efficiency, small volume and good filtering performance, over passive power filter.In this thesis, research on active power filter for comprehensive elimination of heavy harmonic has been carried out and it includes the following aspects:(1) Introduce the theories of dc-link voltage control based APF, which include basic APF theory, dc-link voltage control theory and so on.(2) Design prototype APF according to (1). Following steps are involved: selection of power electronic devices, comparison of control circuit, design of protection circuit for control system and so on. EMTP Simulation of the equipment was done before manufacturing.(3) On line test of the APF was carried out in a steel plant. The test was mainly focused on analysis of transformer loss due to harmonics and comparison of harmonic content in grid before and after installation of the APF.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Basic electronic circuits > Filtering techniques,the filter > Active filter
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