基于被动法的电网基波阻抗估计：包含模型与现场验证

This letter presents a field-verified passive method to estimate the equivalent fundamental frequency grid impedance. The method requires reactive power, active power, and root-mean-square voltage measurements as inputs and is based on a mathematical derivation independent of the angle and frequency estimation. A thorough verification process was adopted, comprising simulations in EMT utilizing a wind turbine with actual control code, field wind turbine measurements, and an operational wind power plant where the transmission system operator agreed to change grid configurations to allow testing of the algorithm for two grid scenarios. Results show good agreement between expectations and estimation from the proposed method.