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基于滤波过程的卡尔曼滤波发散判定方法 被引量:11
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作者 邱恺 黄国荣 +1 位作者 陈天如 杨亚莉 《系统工程与电子技术》 EI CSCD 北大核心 2005年第2期229-231,共3页
分析了传统的基于单步量测的新息序列不等式判据等方法进行卡尔曼滤波发散判断的局限性,根据卡尔曼滤波过程的稳定性定义,采用矩阵序列极限形式给出了基于滤波过程的更加严格的滤波发散判据以及判断滤波发散的实际算法。根据4个判定条件... 分析了传统的基于单步量测的新息序列不等式判据等方法进行卡尔曼滤波发散判断的局限性,根据卡尔曼滤波过程的稳定性定义,采用矩阵序列极限形式给出了基于滤波过程的更加严格的滤波发散判据以及判断滤波发散的实际算法。根据4个判定条件,不但可以判断滤波过程是否发散,而且可以在很大程度上克服不等式判据的缺陷。该方法是基于整个滤波过程而不是基于单步量测,避免了原方法对量测野值比较敏感的缺点,提高了判断的抗野值能力,有利于减少误判风险以及提高判断的可靠性和准确性。仿真结果表明,结论是正确和有效的。 展开更多
关键词 卡尔曼滤波 发散 新息序列不等式 滤波过程 单步量测 野值
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A dynamic phasor estimation algorithm based on angle-shifted energy operator 被引量:1
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作者 JIN XiaNing WANG FuPing WANG ZanJi 《Science China(Technological Sciences)》 SCIE EI CAS 2013年第6期1322-1329,共8页
Under dynamic conditions, the signals of power system have time-varying magnitude and frequency, which might lead to considerable errors for synchrophasor measurement. The traditional discrete Fourier transform (DFT) ... Under dynamic conditions, the signals of power system have time-varying magnitude and frequency, which might lead to considerable errors for synchrophasor measurement. The traditional discrete Fourier transform (DFT) based algorithms used in Phasor Measurement Unit (PMU) are hard to meet the requirements of measurement accuracy because of the existence of spectral leakage. A dynamic phasor measurement algorithm is proposed in this paper in which the input sampled data are considered as non-stationary signals with amplitude modulation-frequency modulation (AM-FM) form, and the measurement is achieved by AM-FM demodulation. An angle-shifted energy operator (ASEO) is used to extract the instantaneous amplitude and low pass differential filter is introduced for frequency estimation. Simulation results indicate that the proposed algorithm can effectively improve the phasor measurement accuracy and has very short response time for PMU under dynamic conditions. 展开更多
关键词 synchronous phasor measurement discrete Fourier transform (DFT) dynamic conditions energy operator
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