Title :
Analysis of the instability modes caused by the UHV interconnection
Author :
Wang, Ansi ; Luo, Yi ; Liu, Guodong
Author_Institution :
Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol. (HUST), Wuhan, China
Abstract :
The first 1000 kV ultra high voltage (UHV) AC transmission line, connecting central China GridGrid (CCG) and north China Grid (NCG), is being constructed in China. It is necessary and important to analyze the stability of the system with the first 1000 kV UHV AC line. Some new challenges and problems would be found and need a theoretical explain. In this paper, the new instable problems caused by the UHV interconnection of the regional power grids are summarized from a lot of stability simulations. The critical cut-set theory with the vulnerability index and stability margin index of the transmission sections is applied to analyze the problems effectively in this paper for the first time. The simulative results show that the UHV AC line is the critical cut-set of the large system. And the results are useful for stability assessment and control for large interconnected power system.
Keywords :
high-voltage engineering; power grids; power system interconnection; power system stability; power transmission control; power transmission lines; central China grid; critical cut-set theory; interconnected power system control; north China Grid; regional power grid; stability margin index; ultra high voltage AC transmission line; voltage 1000 kV; vulnerability index; Control systems; Joining processes; Power grids; Power system interconnection; Power system simulation; Power system stability; Power transmission lines; Stability analysis; Transmission line theory; Voltage; Critical cut-set; stability margin; transmission sections; ultra high voltage; vulnerability;
Conference_Titel :
Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4934-7
DOI :
10.1109/SUPERGEN.2009.5348283
