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High voltage (HV) converter transformer is one of the most important power equipment in DC transmission system. The determination of transient voltage distribution along the winding plays an important role in the insulation design of converter transformer. In this paper an equivalent circuit model for the single-phase converter transformer with the double wound windings has been established, which...
DC Microgrids have been promoted due to their advantages of higher efficiency, higher reliability, and easier connection. The traditional droop based control can obtain fair performance of voltage regulation and load sharing when the dynamics of distributed generators are out of consideration. However, in practical cases, the distributed generators have different dynamics. This makes the DC Microgrid...
Microgrids are the key solution to implement Smart Grid for integration of renewable and distributed energy resources. To make it fully use the renewable resources with intermittent feature, much effort has been made to construct demonstrative projects and investigate a proper power management. The methods used in the most popular hierarchical structure with three layers: primary control, secondary...
This paper is concerned with PID controller, which is an extremely important type of controller. However the optimal PID parameters is difficult to determined, their performance are highly sensitive to the initial guess of the solution. An artificial bee colony (ABC) algorithm approach is introduced in PID tuning and on-line tuning as a novel technique for optimum adaptive control in a non-Lyapunov...
This paper is concerned with the uncertain parameters and time-delays of nonlinear chaotic systems. In this article, a novel artificial bee colony algorithm (ABC), with optimization technique based on the foraging behavior of honeybees, is newly proposed to solve the problem. A nonnegative multi-modal nonlinear optimization is established, whose minimums correspond to a best combination of parameters...
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