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Many islands in China are far from the mainland and electricity is difficult to cover or the cost is high, due to this issue, the wind energy, wave energy and solar energy can be used to meet the demand of island power supply. However, the energy density of these renewable energy sources is low and the stability is poor, which may cause power supply instability. To deal with this issue, a multi-energy...
This paper presents an automated system applied to a dc machine used to the emulation of aerodynamic torque of a distributed generation power plant. The experimental arrangement proposed aims to avoid the wind turbine dependence of climatic variations. In order to evaluate the proposed approach, we presented a set of experimental results.
Wind energy has become increasingly popular in last two-three decades. Renewable energy source using wind energy supply power in remote sectors or it can be use to fed power to the grid connected power systems. Changing in load or wind speed can cause power quality issues. Present paper represent a FACTS based PFC (power filter compensator) controlled by tri-loop controller which improves voltage...
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...
An integration of a Permanent Magnetic Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) into a microgrid is discussed in this paper. A back-to-back Voltage Source Converter (VSC) is employed for the power conversion from the PMSG to the AC grid. The Sinusoidal Pulse Width Modulation (SPWM) technique is adopted for the Wind-side Converter (WSC), while for the Grid-side Converter...
This paper examines a position sensorless modulation strategy, called V-θ control, for six-switch fully-controlled rectifiers (inverters) for surface permanent magnet (SPM) generators in small-scale wind turbines. In this strategy, the SPM generator torque is commanded by controlling the magnitude of the phase voltage and its phase shift with respect to the current waveform. Simulated results obtained...
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,...
Theoretical background included in part 1 of this work has shown the wide variety that the wind energy industry is offering in terms of electrical/electronic components and configurations. Though the first part of the course provides the student with an updated knowledge of the current technological status of the wind energy conversion systems (WECS), from the educational point of view the lectures...
This paper deals with performance analysis of synchronous generator (SG) in stand-alone wind energy conversion system (SWECS) for three-phase four-wire consumer loads. To control the frequency of SWECS, a controller is used which consists of a four-leg insulated gate bipolar transistors (IGBT's) based voltage source converter (VSC) with a battery at its dc link. An automatic voltage regulator is used...
In this work, we are interested in the experimentation of an autonomous wind energy conversion system (WECS) using a test bench emulating a variable speed wind turbine (VSWT). This wind generator is connected to isolated loads through a DC bus and an inverter. The regulation of the DC bus voltage is carried out by a DC load controlled by a chopper. The goal of our work is to show the load voltage...
Wind power is one of the common distributed generation in microgrid. According to the requirements of microgrid, permanent magnet synchronous wind generator (PMSWG) for wind energy distributed generation was designed in this paper and it has simple structure, easy control and low cost characteristics, non-controllable rectifier and grid-connected PWM convertor is adopted as the AC grid-connected circuit...
This paper is concerned with the behavior of a variable-speed wind energy conversion system, in order to assess the power quality injected in the electrical grid. Different topologies for the power-electronic converters are considered, namely two-level and multilevel converters. We use pulse width modulation by space vector modulation associated with sliding mode for controlling the converters, and...
In this paper, a novel rectifier with boost capability is presented. Through control the phase delay angle, the rectifier switches the operating mode from parallel to serial of two sets of power supplies, which is simplified from PMSG. Compared to other topology used in PMSG based variable speed system, the proposed rectifier features low cost, simple control and reliable structure. The topology can...
In this study, a novel sinusoidal PWM Switched Power Filter (SPF) and Dynamic Voltage Compensation (DVC) scheme using VSC/SMC/B-B controller for power mitigation and quality enhancements in medium power distribution systems are simulated. The system is based upon a stand-alone Wind Energy Conversion Scheme (WECS) using an induction generator and the proposed system control mechanisms, which are digitally...
A novel sinusoidal PWM switched power filter (SPF) and dynamic voltage compensation (DVC) scheme is studied in this work. A real time dynamic voltage, power and generator velocity error tracking based fuzzy logic controller (FLC) is used to stabilize the stand alone wind energy conversion scheme (WECS) comprising an induction generator. The novel dynamic error driven FLC controlled scheme serves as...
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