Analysis of Maximum Output of Offshore Wind Power in ZS Power Grid Considering Voltage Stability

After the ZS five-terminal flexible DC transmission demonstration project in Zhejiang Province put into operation, the stability characteristics of ZS Power Grid have been changed. Based on the ZS equivalent grid with flexible DC connection for offshore wind power, the maximum output of offshore wind power considering voltage stability is analyzed in this paper. The details are as follows: Firstly, based on the conventional system equivalent method, the ZS Power Grid is equivalent to a small system with the same grid structure, thus simplifying the research object. Secondly, the branch voltage stability indexes are briefly introduced, and their adaptabilities to the equivalent grid are verified. Finally, based on the branch voltage stability index, the maximum output of the wind farm considering voltage stability is given.