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The Analysis and Comprehensive Elimination on Guyuan Power System Harmonic

Author: ZuoYuMin
Tutor: DongHui
School: Xi'an University of Architecture and Technology
Course: Control Theory and Control Engineering
Keywords: Harmonic Fourier transform Windowed interpolation Static Var Compensator SVC Reactive power compensation
CLC: TM711
Type: Master's thesis
Year: 2009
Downloads: 40
Quote: 0
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Abstract


Frequency devices , fairing nonlinear load access , especially electrified railway running to the grid into a large number of high-order harmonic harmonic voltage of the utility grid voltage fluctuation and flicker , three-phase voltage unbalance worsening grid power loss increases , the abnormal electrical equipment , part of the protection device can not operate normally can not even run , causing electrical accident increases every year . Therefore , the power grid harmonic analysis and governance is imperative. Papers from two aspects of the comprehensive management of harmonic measurement and harmonic . In order to test whether the level of actual power system harmonic source user harmonic compliant , thereby reducing the impact of harmonics on the grid , portable power quality analyzer PS2 at regular intervals of of Guyuan grid voltage , current 5 minutes for three consecutive hour of real-time measurements . Analyzed on the measurement results , the harmonic current exceeds the national standard , due to the excessive electric iron of Guyuan grid voltage distortion rate , Guyuan region seriously affect the power quality . Harmonic analysis , harmonic detection method based on instantaneous reactive power detection method , the detection method based on wavelet transform , neural network - based detection method based on Fourier transform harmonic detection method . In this paper, the harmonic detection method based on Fourier transform . Simulation using Matlab entire Guyuan grid of 110kV and its tributary , the simulation results show that the the windowed interpolation algorithm based on the Fourier transform of a harmonic analysis method to eliminate spectral leakage and picket fence effect . TCR FC SVC static var compensator device automatic tracking system reactive power demand or changes in the voltage compensation works , including voltage and current measurement link voltage regulator link the synchronous triggering aspects , including the control systems. And in accordance with the actual situation of Guyuan region grid proposed in the the busbar using 27.5KV side program of the single-phase TCR FC SVC static var compensator device . Demonstrate through simulation the feasibility of the program , the analysis before and after compensation Electric Railway 110KV bus 3,5,7 harmonic current and voltage distortion , results show that the current content of the odd harmonics significantly reduce the harmonic distortion GB value is also lower than the installed static var compensator can effectively inhibit the grid harmonic .

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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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