Frequency Response Model for Power Systems Including HVDC-Connected Offshore Wind Power With Communication-Free Frequency Control. - Jinpeng Guo; Wenhao Li; Xueping Pan; Jinhai Zheng; Ningyu Zhang 005; Yuqiao Jia; Xiaorong Sun; Yuyi Kuang (IEEE Trans. Circuits Syst. I Regul. Pap., 2026)