AUTHORS: Bahman Khaki

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ABSTRACT: The objective of this paper is to show the effect of proper design of controllers parameters on transient and small signal stability of the power system, and to model dynamics of various Distributed Generation (DG) technologies or Distributed Energy Resources (DER) for power system stability analysis issues. These models are studied in transient and small signal stability of power system; thus differential and algebraic equations of various DGs and conventional synchronous generators are formulated together with dynamics of other elements, such as exciters and so on. Two types of Wind turbines (WT) used, (1) Doubly Fed Induction Generator (DFIG) (2) constant speed wind turbine (CSWT). These models are used to investigate the effects of optimization of controllers on small signal and transient stability of the power system. The results are applied for stability studies of a power system i.e. Modified IEEE 14 bus test system to demonstrate a typical application. Results shows that there is an appropriate impact on stability control of the power system with optimization of controllers for excitation system of conventional power system, and also wind turbine integrated to system in the typical power system

KEYWORDS: Doubly fed induction generator Wind Turbines, Constant speed Wind turbines, Dynamic Algebraic Equations, Exciter, small signal stability, transient stability.

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