Online Estimation of Transient Stability in a Two-Area Power System Based on Local and Wide-Area Measurements
Subject Areas : electrical and computer engineeringM. Arabzadeh 1 , H. Seifi 2 * , Mohammad Kazem Sheikh El Eslami 3
1 - Tarbiat Modares University
2 - Tarbiat Modares University
3 - Tarbiat Modares University
Abstract :
Transient stability analysis (TSA) is one of the important issues in the power system operation. The common methods of TSA are typically based on offline simulations so that some preventive and corrective actions may be designed to be adopted in real time conditions. To reduce the risk of these actions, in this paper a new method of transient stability estimation is proposed in which both local and wide-area measurements are used. According to the proposed method, the coherent generator groups of the two-area power system are initially identified and then the system is simplified based on the single machine equivalent (SIME) method. Thereafter, the equal area (EA) criterion is used to estimate the system transient stability. The innovation of this paper is the calculation of the acceleration area of SIME system based on the acceleration areas calculated locally in generator buses. The proposed method is applied on a10-mchine 39-bus test system and its results are presented by further explanation of its technical advantages.
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