A unified method is presented which allows to estimate dc-offset, all harmonic components and fundamental frequency in arbitrarily distorted single-phase grids using a Frequency Adaptive Observer (FAO) consisting of modified Second-Order Generalized Integrators (mSOGIs) , an adaptive DC-Integrator (DCI) and a modified Frequency Locked Loop (mFLL) . DCI and mSOGIs are tuned by pole placement which allows for an arbitrarily fast detection of dc-offset and harmonic components if the fundamental frequency is known. If the fundamental frequency must be estimated as well, an mFLL with Gain Normalization (GN) , Rate Limitation (RL) , Anti-Windup (AW) strategy and low-pass filters (LPF) must be employed. The effectiveness of the proposed FAO is validated by experimental results and its enhanced performance is shown and compared to existing estimation methods.

中文翻译：

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直流偏移的任意畸变单相电网通用信号参数估计的统一方法

提出了一种统一的方法，该方法可以估算直流偏移，所有谐波分量 和 任意畸变的单相电网的基本频率使用 频率自适应观测器（FAO） 包含由...组成 修改后的二阶广义积分器（mSOGI） ，自适应 直流积分器（DCI） 和一个 修改后的锁频环（mFLL） 。DCI和mSOGI的调整方式为杆位如果已知基频，则可以任意快速检测直流偏移和谐波分量。如果还必须估算基频，则具有增益归一化（GN） ， 速率限制（RL） ， 防风（AW） 策略与 低通滤波器（LPF）必须雇用。实验结果证实了拟议的粮农组织的有效性，并显示了其改进的绩效，并与现有的估算方法进行了比较。