Stability Analysis of Conventional and Superconducting Synchronous Generators and Their Applications to a Hybrid Offshore Wind Farm Connected to a Multi-Machine Power System

• Main Authors: Chuan-ChiehYeh, 葉筌傑
• Other Authors: Li-Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/21428876322576425445

碩士 === 國立成功大學 === 電機工程學系 === 104 === This thesis presents stability analysis results of two system configurations using a conventional synchronous generator (SG) and a superconducting synchronous generator (SCSG). System configuration 1 is a large-scale power system consisting of an SG and an SCSG connected to power grid. System configuration 2 is a three-generator nine-bus multi-machine power system while one of the three SGs is replaced by an SCSG and an integrated SCSG-based and doubly-fed induction generator (DFIG)-based hybrid offshore wind farm (OWF) is connected to the system. The q-d axis equivalent-circuit model is derived to establish the complete system model under three-phase balanced condition. The designed proportional-integral-derivative (PID) and the lead-lag oscillation damping controllers (ODC) of superconducting magnetic energy storage (SMES) unit to damp low-frequency oscillations of the studied systems with a superconducting fault-current limiter (SFCL) are carried out. Steady-state characteristics of the studied systems under various operating conditions of the SG, the SCSG, wind speed, and length of lines are performed. Dynamic and transient simulations of the studied systems subjected to a wind-speed disturbance, a torque disturbance, and a three-phase short-circuit fault at the studied power systems with and without the SFCL and the designed ODC are also compared.