用离散小波变换分析500kv单回路输电系统电磁瞬变的谐波

C. Jaipradidtham, S. Pasomkusolsil
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引用次数: 6

摘要

提出了一种基于离散小波变换的信号处理方法,用于评估500kv单线输电系统的电磁暂态谐波含量。利用线电场积分方程在频域进行了电磁瞬变分析。在电压和电流波形达到稳态后,提出了用于电力系统谐波分析的离散傅立叶变换(DFT)滤波器组,以及用于非平稳电力系统谐波分析的基于dwt的信号处理方法。仿真结果表明,该方案能够在各种系统配置和故障条件下提供正确的响应,并能对电力系统中500kv超高压输电线路进行实际谐波评估。
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Harmonic Analysis of Electromagnetic Transients in 500 kV Single Circuit Transmission System Using Discrete Wavelet Transform
The paper presents an approach based signal processing on discrete wavelet transform for the evaluation of harmonic contents of electromagnetic transients in 500 kV single circuit transmission system. The analysis of electromagnetic transients is carried out by employing the wire electric field integral equation in frequency domain. After reaching the steady state the voltage and current waveforms, this paper presents a discrete-Fourier transform (DFT) filter bank for analyzing power system harmonic, and a DWT-based signal processing for harmonic analysis of non-stationary power system waveforms. Simulation results show that this scheme is capable of providing correct responses under various system configurations and fault conditions and practical harmonics evaluation of 500 kV EHV transmission lines in power system.
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