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Research On Super Capacitor Energy Storage Typed APF In Micro Grid

Posted on:2015-04-10Degree:MasterType:Thesis
Country:ChinaCandidate:H Y ZhouFull Text:PDF
GTID:2322330482482499Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
In recent years, people pay more and more attention to green energy and ecological environment, so the micro grid that integrates solar power, creature power, wind power and other renewable energy to generate power is emerged. It can save investment, reduce energy consumption, increase energy efficiency and meet the demand of growing power. But the problems of temporary power interruption and voltage dip, etc. can seriously influence the steady run of power supply system. Meanwhile, the micro grid also exits harm because of the large number of nonlinear loads, such as harmonic and wattless current. Therefor, this paper proposes forward an APF that uses the super capacitor as its energy storage component, which manages the harmonic and reactive currents, can also solve the short power outage, voltage sag and others. So this compensation device can improve the power quality of micro grid comprehensively.Firstly, this paper presents the features, energy storage mechanism and the ideal model of super capacitor, and then the structure of super capacitor energy storage system. Secondly, the topological structure of the super capacitor energy storage typed APF is built, and states its operational principle. Thirdly, the harmonic and wattless currents are detected by zp-/q method which is based on instantaneous wattles power theory. When controlling harmonic current, hysteresis comparison control method is used through comparing the advantages and disadvantages of various algorithms to track and control the harmonic current.Then, the APF which uses the ip-iq method and the hysteresis comparison control technology is simulated. In addition, the paper carries on the analysis and simulation of the detection method and compensation process for the micro grid voltage dip.Lastly, the APF prototype and super capacitor energy storage system which use the TMS320F2812 high speed DSP and CPLD as control core are designed. Meanwhile, the software and hardware are recommended detailedly. Preliminary testes are done, and the experimental results show that this equipment can well solve many power quality problems, such as harmonic and voltage fluctuation.
Keywords/Search Tags:Micro grid, Super capacitor, Active power filter, Bi-directional DC/DC converter, Instantaneous wattles power theory, Hysteresis comparison control, Voltage sag
PDF Full Text Request
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