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Optimization of Transient Stability Control Part-I: For Cases with Identical Unstable Modes  

Xue Yusheng (Nanjing Automation Research Institute (NARI))
Li Wei (Nanjing Automation Research Institute (NARI))
Hill David John (Department of Information Engineering, Australian National University)
Publication Information
International Journal of Control, Automation, and Systems / v.3, no.spc2, 2005 , pp. 334-340 More about this Journal
Abstract
Based on the stability margin provided by the EEAC, the unstable contingencies can be classified into sets according to their unstable modes. This two-part paper develops a globally optimal algorithm for transient stability control to coordinate preventive actions and emergency actions. In the first part, an algorithm is proposed for a set of contingencies having identical unstable modes. Instead of iterations between discrete emergency actions and continuous preventive actions, the algorithm straightforwardly searches for a globally optimal solution. The procedure includes assessing a set of insufficient emergency schemes identified by the EEAC; calculating the related preventive actions needed for stabilizing the system; and selecting the scheme with the minimum overall costs. Simulations on a Chinese power system highlight its excellent performance. The positive results obtained are explained by analogizing settlements for 0-1 knapsack problems using the multi-points greedy algorithm.
Keywords
Extended equal area criterion (EEAC); nonlinear mixed programming; optimization; power systems; transient stability control;
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