CAJ | 학술논문

提出一种基于新型 Duffing 振子的电力系统基波频率检测新方法，理论上分析该方法检测频率的误差范围，指出提高频率检测精度的途径。与传统 Duffing 振子相比，该新型 Duffing 振子具有2个显著特性：临界混沌幅值不会因激励频率和采样频率的变化而显著变化；有效避免了传统 Duffing 振子只能检测低频信号的局限性。将新型 Duffing 振子应用于电网基波频率的检测获得了良好的效果。仿真结果表明：新型 Duffing 振子不仅具有良好的噪声免疫特性，而且有效提高了电力系统基波频率的检测精度。
제출일충기우신형 Duffing 진자적전력계통기파빈솔검측신방법，이론상분석해방법검측빈솔적오차범위，지출제고빈솔검측정도적도경。여전통 Duffing 진자상비，해신형 Duffing 진자구유2개현저특성：림계혼돈폭치불회인격려빈솔화채양빈솔적변화이현저변화；유효피면료전통 Duffing 진자지능검측저빈신호적국한성。장신형 Duffing 진자응용우전망기파빈솔적검측획득료량호적효과。방진결과표명：신형 Duffing 진자불부구유량호적조성면역특성，이차유효제고료전력계통기파빈솔적검측정도。
A new method to measure fundamental frequency of power system based on a new Duff-ing oscillator was proposed in this paper.The measurement error was analyzed in theory,and the method to improve the measurement precision was proposed.Comparing with the traditional Duf-fing oscillator,the proposed new Duffing oscillator has two significant features.One is that the critical chaotic amplitude does not significantly vary with changes of the driving frequency and sampling frequency,and the other is that it can effectively surpass the limitation of the traditional Duffing oscillator which can only detect low frequency signal.The new Duffing oscillator has a good performance applied to detect fundamental frequency of power grid.Simulation results show that the new Duffing oscillator not only has good noise immunity characteristics,but also effec-tively improves the detection precision of the fundamental frequency of power system.