Primary frequency control considering communication delay for grid-connected offshore wind power systems  

作　　者：Xueping Pan Qijie Xu Tao Xu Jinpeng Guo Xiaorong Sun Yuquan Chen Qiang Li Wei Liang 

机构地区：[1]School of Electrical and Power Engineering,Hohai University,Nanjing 211100,P.R.China [2]Electric Power Research Institute of State Grid Jiangsu Electric Power Co.Ltd,Nanjing 211103,P.R.China

出　　处：《Global Energy Interconnection》2024年第3期241-253,共13页全球能源互联网（英文版）

基　　金：the support of the National Natural Science Foundation of China(52077061);Fundamental Research Funds for the Central Universities(B240201121).

摘　　要：Offshore wind farms are becoming increasingly distant from onshore centralized control centers,and the communication delays between them inevitably introduce time delays in the measurement signal of the primary frequency control.This causes a deterioration in the performance of the primary frequency control and,in some cases,may even result in frequency instability within the power system.Therefore,a frequency response model that incorporates communication delays was established for power systems that integrate offshore wind power.The Padéapproximation was used to model the time delays,and a linearized frequency response model of the power system was derived to investigate the frequency stability under different time delays.The influences of the wind power proportion and frequency control parameters on the system frequency stability were explored.In addition,a Smith delay compensation control strategy was devised to mitigate the effects of communication delays on the system frequency dynamics.Finally,a power system incorporating offshore wind power was constructed using the MATLAB/Simulink platform.The simulation results demonstrate the effectiveness and robustness of the proposed delay compensation control strategy.

关 键 词：Offshore wind power Primary frequency control Time delay Padéapproximation Time-delay compensation control 

分 类 号：TM614[电气工程—电力系统及自动化]