Everywhere in our daily life we encounter nonlinear phenomena. In fact, it is well known that the real life is nonlinear. Because of difficulty of solving nonlinear problems, they used to go for easy way and linearize the problem based on some assumptions. These assumptions may lead to the loss of important information in the system. Because of that, and to be more realistic, the objective of this issue is to use the modern nonlinear theory (bifurcation and chaos) to establish real nonlinear models for practical systems, engineering sciences, and engineering applications.

The scope of this issue is to publish original papers on all topics related to nonlinear dynamics and its applications such as power system, power electronics, electric machines, renewable energy, and so on. The contributions concerned will be discussion of a practical problem, the formulating nonlinear model, and determination of closed form exact or numerical solutions.

We invite investigators to contribute original research papers as well as review papers that will stimulate the continuing efforts to understand the bifurcation and chaos control theory in electric power systems. We are particularly interested in articles describing the new methods of controlling bifurcation and chaos. Potential topics include, but are not limited to:

• Nonlinear dynamic stability
• Bifurcation and chaos
• Perturbation techniques
• Classic control systems
• Intelligent control systems (fuzzy, neural, genetic, etc.)
• Power systems and energy
• Electrical machines
• Power electronics and machine drives
• Nonlinear control