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The Research is Used to Treatment the Power Quality in Electric Railway Based on the Hybrid Active Power Filter

Author: ZhangFengQuan
Tutor: XuXiangZheng
School: East China Jiaotong University
Course: Power Electronics and Power Drives
Keywords: electric railway power quality harmonic suppresion reactive powercompensation H∞control
CLC: U223.52
Type: Master's thesis
Year: 2013
Downloads: 4
Quote: 0
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Abstract


From August15,1961, China’s electric railway has developed50years sinceFengZhou-BaoJi railway built which is the first paragraph electrified railway. With years ofoperation, it shows that the electric railways have excellent performance, high speed withsuitable overloaded, low energy, low operation cost, little environmental pollution, etc. Butthe electric railway on power system of power quality has serious pollution of power qualityproblems, such as harmonic, reactive and negative sequence. With rise of China’s railwayelectrification level, the harmonics and reactive power problems of the grid will be moreoutstanding, and also will produce the bad influence to economic operation of the powerequipment. Therefore, it’s important and practical significance to improve the power factor oftraction power supply system, reduce the harmonic, improve the power grid and electricrailway itself, increase the safety operation of the power equipment utilization, improveenvironment and improve the green power grid electrification management method that studythe harmonic, electric railway reactive power quality comprehensive management.Based on the present research of the reactive power compensation and harmonic controlof technology, this paper is expounded the development of power filter and classification. Itis induced and summarized the electric railway traction power supply modes, the type oftraction transformers and electric locomotives, and it is discussed the transmission mechanismand the harmonic generation principle of them.This paper is researched SS6B as the object of the type electric locomotives, and usedMATLAB/SIMULINK to construct electric locomotive dynamic model of SS6B type. Basedon detecting the electrified railway harmonic and reactive current, this paper is simulatied andanalysised the harmonic current and reactive current of the electric locomotive of SS6B typeusing the theory of instantaneous reactive power. In this paper, it is combinated a HybridPower Filter with the Active Power Filte which has good dynamic compensation performance,reactive power compensation and the Passive Power Filter which has high voltage and largecapacity based on the development of power filter. And the Hybrid Power Filter is parallelaccessed in the electric power system in order to eliminate the harmful effect of the electricrailway traction load to the power supplying quality of power system. Then adopting themethod of hysteresis control and combining hysteresis control with H∞control, it always tracksthe dynamic changes of harmonic and reactive current that caused by the load changing. With the analysised and studied of the different control methods, it is showed the superiority ofharmonic treatment and the reactive power compensation in electric railway. Through thesimulation results it is showed that combining the hysteresis control with H∞control method can bebetter tracking load change, suppresing harmonic and compensateing reactive power when the electricrailway load is changed.

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CLC: > Transportation > Rail transport > Electrified railway > Power supply > Power supply technology > The quality of power supply
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