CAJ | 학술논문

利用广域测量系统实测数据，提出基于并行时频原子复带通滤波的低频振荡在线监测新方法。在振荡频率区间内并行设置多个时频原子复带通滤波单元，通过并行滤波计算，能获取各模式幅值、瞬时频率和衰减系数，再利用粒子群优化算法估计相位参数。每个滤波单元时频域带宽柔性可调，能根据测量要求自适应取得较高的模式分辨率和较短的观测时窗长度。该方法对噪声鲁棒性好，能准确辨识各复合振荡模式，有助于电力系统强非线性模式分析，便于在线监测应用。仿真算例及实例分析结果均表明所提方法的正确性和有效性。
이용엄역측량계통실측수거，제출기우병행시빈원자복대통려파적저빈진탕재선감측신방법。재진탕빈솔구간내병행설치다개시빈원자복대통려파단원，통과병행려파계산，능획취각모식폭치、순시빈솔화쇠감계수，재이용입자군우화산법고계상위삼수。매개려파단원시빈역대관유성가조，능근거측량요구자괄응취득교고적모식분변솔화교단적관측시창장도。해방법대조성로봉성호，능준학변식각복합진탕모식，유조우전력계통강비선성모식분석，편우재선감측응용。방진산례급실례분석결과균표명소제방법적정학성화유효성。
A novel method based on concurrent time-frequency atom （TFA） complex band-pass filters was proposed in this paper for online monitoring low frequency oscillation. First several TFA complex band-pass filter units were arranged within the low-frequency band to obtain mode magnitude, frequency and attenuation factor. Second, particle swarm optimization （PSO） algorithm was utilized to estimate the phases and DC component. Each filter has flexible adjustability of its time window and frequency bandwidth. Therefore, high mode resolution and short observation time window can be self-adaptively achieved. The proposed method can identify composite modes and strongly time-varying modes accurately with good noise robustness, catering for online analysis. The simulation results and the field test resultof a real power system all show its correctness and effectiveness.