Review on Modeling Methods of Large-Scale Wind Power Connected UHVDC Systems

When large-scale wind power is transmitted through ultra-high voltage direct current (UHVDC) system, transient overvoltage (TOV) problems caused by events such as commutation failure and DC blocking seriously affect the safe operation of the system and constrain the power transmission capacity. Accurate modeling of the system is the basis for analyzing the transient overvoltage characteristics of the system. In this paper, the modeling methods of the main components of the system, especially UHVDC transmission line and large-scale wind power cluster, were sorted out in detail. The advantages and disadvantages of various modeling methods were reviewed. Feasible optimization schemes were proposed for future modeling of large-scale wind power connected UHVDC system.