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Prediction of Power Quality in Power System Affected by Electrified Railways

Author: DongXiang
Tutor: LiQunZhan
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: Traction power supply system Negative sequence Harmonic Monte Carlo Forecast
CLC: TM711
Type: Master's thesis
Year: 2009
Downloads: 397
Quote: 6
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Abstract


Electrified railway plays an important role in China's overall transportation system , but on the power supply system and the the neighboring majority of electricity users bring negative sequence harmonic interference and other adverse effects . With the increase of new electrified railway , the expansion of the existing electrified railway , the locomotive advances in technology and the development of the power system , railway electrification brought power quality problem will be the extent to which the power system planning will impact needed . Papers on the basis of a detailed analysis of the traction load distribution characteristics , the use of statistical methods , a more in-depth study of the electrified railway power quality forecast . The thesis expounded transform the relationship between traction transformers port , negative sequence harmonics assessment indicators calculated . Traction load process as a stochastic process , using the Monte Carlo method to simulate the traction load current random process . A detailed analysis of the relationship between the traction boundary conditions and power quality of the power supply system , traction substation negative sequence , the universal law of the harmonic distribution characteristics . New traction substation boundary conditions , select the appropriate measured raw data of traction substation capacity equivalent , as new traction substation load data for the calculation of the power quality that reach the electrified railway power quality forecast purposes. Finally, the use of Hainan power grid parameters to calculate the impedance matrix , select the appropriate load the raw data for the Hainan East Central Railway , programming calculation of the electrified railway power quality indicators . East Central Railway measure access Hainan power grid power quality , and provide access to East Central Railway Hainan power grid reference .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Network analysis,power system analysis
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