This paper presents the control of a WECS (wind energy conversion system), equipped with a DFIG (doubly fed induction generator), for maximum power generation and power quality improvement simultaneously. The proposed control algorithm is applied to a DFIG whose stator is directly connected to the grid and the rotor is connected to the grid through a back-to-back AC-DC-AC PWM (pulse width modul...

Optimal Reactive Power Dispatch (ORPD) is a multi-variable problem with nonlinear constraints and continuous/discrete decision variables. Due to the stochastic behavior of loads, the ORPD requires a probabilistic mathematical model. In this paper, Monte Carlo Simulation (MCS) is used for modeling of load uncertainties in the ORPD problem. The problem is formulated as a nonlinear constrained mul...

Most of the ac-ac converters used in home-appliances are based on single-output dc-link inverters, which provides a cost-effective and straight-forward solution. However, this twostage power conversion decreases power density and efficiency. Direct ac-ac conversion has been thoroughly studied in the past. However, the complex control scheme and higher cost has prevented it from being used in lo...

This paper presents a fast and accurate method to determine the available transfer capability. Ralston’smethod is used to predict the two trajectory points of voltagemagnitude, power flow, and maximum generator rotor angle difference. Then, the cubic spline interpolation technique is used to accurately trace the P-V, P-S, or P-Δδ curves between two points of trajectory. The P-V, P-S and PΔδ cur...

Power quality (PQ) problems for renewable energy system (RES) is major challenge using these systems. Amplitude, frequency, and waveform important PQ parameters especially standalone or isolated In this paper we propose RES with wind turbine (WT) permanent magnet synchronous generator (PMSG) to feed different loads (liner, non-liner) through AC-DC-AC converter. The PMSG operate fuzzy logic iner...

This paper presents results of a study concerning the dynamic behaviour of a wind energy system powered by a doubly fed induction generator with the rotor connected to the electric network through an AC-AC converter. A tendency to put up more and more wind turbines can be observed all over the world. Also, there is awareness in taking into account the requirements of a clean environment, due to...

With the increasing penetration of wind energy into power system, wind energy conversion systems (WECSs) should be able to control the power flow for limited as well as maximum power point tracking. In contrast to the traditional pitch angle control, this paper focusses on field oriented speed control of permanent magnet synchronous generator (PMSG) for controlling the active power flow based o...

For comparative purposes, a 200 volt dc system for a large modern commercial aircraft has been designed and Its weight compared with that of a conventional three-phase ac system. To obtain necessary design informatlon, studies have been made of a 50 kW brushless dc generator, the problem of circuit Interruption, conversion equipment and brushless motors. The vulnerability of the system due to t...

Renewable energy is a naturally available source in nature, including wind, bioenergy, geothermal heat, solar radiation, flowing and high-drop water, as well oceanic motion temperature changes. Planning for the Micro Hydro Power Plant (PLTMH) Yeh Dikis Banjar Lebah, Tabanan Regency, utilizes an AC generator one of ways renewable can be utilized. The literature review observation methods were em...