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CSC topology with natural advantages in terms of simple structure, grid friendly waveforms, controllable power factor, and reliable grid short-circuit protection is considered to be a promising converter configuration for use in mediumvoltage (kV) high-power (MW) PMSG based wind energy systems. In view of this, three types of configurations for current source converter (CSC) based medium-voltage PMSG...
This paper presents a comprehensive study on the state-of-the-art and emerging wind energy technologies from the electrical engineering perspective. In an attempt to decrease cost of energy, increase the wind energy conversion efficiency, reliability, power density, and comply with the stringent grid codes, the electric generators and power electronic converters have emerged in a rigorous manner....
This paper proposes a novel control technique to improve the power factor over a wide range of wind speed in a wind energy conversion system (WECS) based on a current source inverter (CSI) and an electrically excited synchronous generator (EESG). The system consists of diode rectifier on the generator-side while a pulse wave modulated (PWM) CSI is on the grid-side. In the proposed control scheme,...
A new power converter interface for permanent magnet synchronous generator (PMSG) based wind energy conversion systems (WECS) is presented in this paper. The converter stage is capable to step-up the low-voltage side of standard six-phase PMSG used in today's WECS to a medium-voltage grid side. The proposed converter is an hybrid back-to-back topology composed of two series connected three-phase voltage...
The increasing influence of wind power in the power system operation has caused the power system operators to include wind power plants in the control of the overall power system, both in steady-state and transient operation. Therefore, the grid connection requirements of the power system operators involve wind power systems. Low voltage ride-through requirement is probably the most demanding grid...
This paper presents a reactive power control scheme for Current Source Converter (CSC) based wind energy system using a Permanent Magnetic Synchronous Generator (PMSG). The novelty of the proposed scheme is to adjust d-axis current of the PMSG to achieve reactive power control for the utility grid. The principle of the control scheme is discussed, and theoretical analysis is provided. The effectiveness...
In a current source converter (CSC) based wind energy system, the dc link current plays an important role in determining the system dynamic performance. This paper proposes two control strategies that can be used to improve the dynamic performance of the dc link current in a CSC wind energy system using permanent magnet synchronous machine (PMSM). State space equations and small-signal models of the...
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