Stability Analysis of a Hybrid Offshore Wind Farm Connected to HVDC System with Supercapacitor Energy Storage System and High Temperature Superconducting Wire

• Main Authors: Ting-WeiHong, 洪庭尉
• Other Authors: Li Wang
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/81935509193948352234

碩士 === 國立成功大學 === 電機工程學系 === 103 === This thesis presents stability analysis of an integration of a superconducting synchronous generator (SCSG)-based offshore wind farm (OWF) and a permanent-magnet synchronous generator (PMSG)-based OWF connected to a power grid through a high-voltage direct current (HVDC) system using a supercapacitor energy-storage system and a high temperature superconducting wire. The q-d axis equivalent-circuit model is derived to establish the complete system model under three-phase balance conditions. Steady-state analysis characteristics of the studied system under different values of wind speed and transmission line are examined. Dynamic and transient simulations of the studied system subject to a wind-speed disturbance and a three-phase fault at the power grid are also carried out. It can be concluded from the simulation results that the proposed energy-storage systems can offer better effects on power-flow control and stability improvement of the studied system, while the system stability can also be further improved when the lead-lag damping controller is in service.