摘要
根据离散的电网三相电压信号,利用基本对称分量分析方法对三相电力系统的电压信号进行变换,获得系统信号瞬时值正序对称分量表达式。通过对该方程的变换得到系统信号的非线性状态方程和量测方程,在存在系统噪声和信号严重畸变的状态下,利用扩展卡尔曼滤波方法实现基本正序对称分量和频率的正确估计。仿真结果表明了方法的有效性。
From the discrete values of 3-phase voltage signals, the positive sequence instantaneous symmetrical component is obtained by using symmetrical component transformation. After dealing with the component, the nonlinear state and observation equation of the signal is formed. The fundament symmetrical component of the positive sequence and the frequency are estimated accurately with significant noise and harmonic distortion. The simulation results shows the effective of the method.
出处
《电气应用》
北大核心
2005年第10期83-86,共4页
Electrotechnical Application
基金
国家自然科学基金项目(50275044)
福建省自然科学基金计划资助项目(E0440005)
福建省教育厅科研基金(JAO04230)
关键词
扩展卡尔曼滤波
电力系统
正序分量
频率估计
extended Kalman filter power system positive sequence frequency estimation
