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The Study On Control Of Current Source Converter For Super-conducting Magnetic Energy Storage System

Posted on:2007-09-20Degree:MasterType:Thesis
Country:ChinaCandidate:Y P ShiFull Text:PDF
GTID:2132360182486853Subject:Power electronics and electric drive
Abstract/Summary:PDF Full Text Request
As an energy storage technology, Superconducting magnetic energy storage(SMES) has a high efficiency because there is no conversion of energy to other forms, such as chemical in batteries and mechanical in flywheels. The value of SMES has been significantly increased thanks to the development of Power Electronics. The Converter ,which is used as the interface between the Power Network and the SMES coil, enables very fast response to absorb or insert active power and reactive power from/into the utility. It is the fast response that makes SMES able to provide benefit toa utility not only by diurnal load leveling but also by stability enhancement.This thesis introduces the structure of High-Temperature Superconducting magnetic energy storage system, analyses the theory of Current source converter and gives the design of the converter for SMES. The converter consists of four modules. Each module is a current source converter. Carrier phase-shifted SPWM technique is adopted to control a directly-paralleled multi-modular current source converter for SMES to reach high power and low harmonics. An active power and reactive power control used in four-modular converter for SMES is presented in this thesis. A prototype of multi-modular converter which is based on 863-program has been developed. At last this thesis gives the experimental results of the above practical four-module current source converter. The experimental results of damping the low frequency oscillation of the generator by SMES was also given.
Keywords/Search Tags:Superconducting Magnetic Energy Storage(SMES), Current Source Converter, Power Control, Active Power, Reactive Power
PDF Full Text Request
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