摘要
针对波阻抗方向继电器利用初始电压和电流行波的比值构成的特点 ,提出了基于小波变换的继电器算法。算法主要解决了 2个方面的问题 ,即行波的提取和方向判据的实现。理论分析和仿真结果表明算法准确、可靠 ,且具有较强的消噪能力 。
According to the property that the surge impedance relay is realized by the ratio of voltage and current travelling waves, the relay's algorithm based on wavelets is present. The algorithm solves the problems of extracting travelling waves and constructing criterion. Its core is that multi-scale criterion is constructed with wavelet transforms. Theoretical analyses and EMTP simulations verify that the algorithm possesses many advantages such as precision, high reliability and immunity to noise. The algorithm can be implemented easily by digital manner. This project is supported by National Natural Science Foundation of China (No. 50077011, No. 59877020) and Fundamental Research Fund of Tsinghua University (No. JC2000021).
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第10期14-17,共4页
Automation of Electric Power Systems
基金
国家自然科学基金!(5 0 0 770 115 98770 2 0 )
清华大学基础研究基金! (JC2 0 0 0 0 2 1)
关键词
波阻抗方向继电器
算法
电力系统
继电保护
行波
Algorithms
Computer simulation
Electric currents
Electric impedance
Electric lines
Electric potential
Electric surges
Spurious signal noise
Wavelet transforms
