Control Region Division for Secondary Voltage Control

• Main Authors: Ruei-Yu Wang, 王睿瑜
• Other Authors: Yi-Ting Chou
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/a97245

碩士 === 國立宜蘭大學 === 電機工程學系碩士班 === 103 === Due to the increasing load, the unbalance between power generation and demand, and the restricted topology of transmission lines, Taiwan power system risks insufficient voltage stability. In addition, due to the difficulty of land acquisition, it is challenging to construct new transmission projects and large-scale control equipment, which becomes an obstacle for voltage profile improvement. In order to solve such problem, the concept of secondary voltage control (SVC) has been proposed as it can regulate voltage disturbance and also improve the voltage stability margin. To apply the solution, the utility has to divide the whole power system into several SVC regions and determine a pilot bus in each region. Therefore, this thesis aims at how to divide the control regions and select the location of pilot bus. Through massive simulations considering different types of contingencies, huge amount of system response data were collected and parsed. Using the converted response data, a clustering algorithm was applied to divide the system into several control regions. Also, by adopting principle component analysis (PCA), the pilot bus location was also decided. Compared to the traditional method which utilized electrical coupling parameter as the data mining index, this thesis instead utilized response data, which may be real-time measurement data or recent historical data in practical cases. This approach enables dynamic division, which further allows SVC to be more adaptive and reach higher performance.