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High Power flywheel starter generator system realizes the integration of starting and generation functions using one motor. This paper introduces the key technologies of high power flywheel starter generator system based on DSP TMS320F28335, presents a practical and high precision circuit to measure the voltage and a control strategy based on double loop with weak magnetic loop to enable the generator...
This paper presents details comparisons between the stator-flux oriented and the voltage oriented control strategies for the doubly fed induction generator (DFIG) wind energy system. This paper develops a dynamic model of DFIG in the rotating reference frame, which is used to obtain the rotor current components into the generator torque and stator reactive power references using the both control strategies...
This paper presents investigations in the design of wind turbine control systems to maximize the energy capture and their impact onto the grid. The modeling of the wind turbine is presented. Then three different speed control systems are detailed and evaluated through simulations carried out with Matlab Simulink TM. Power fluctuations on the distribution grid are then compared by considering the same...
Many regions in Russia have no centralized electricity supply because of their geographical location. Taking into account variable electricity generation, available energy storage systems, as well as stricter requirements imposed by consumers on power quality and electricity supply reliability, we can say that operating conditions of such systems and their control, including emergency control, represent...
The purpose of modern wind energy conversion systems is to extract the aerodynamic power from the wind and convert it to electric power. The most popular today is variablespeed horizontal wind turbine (HWT) with three blades. The main objective of this paper is to design the controller that is capable to optimize the power output in the lower wind speed region and to maintain the rotor power limits...
This paper is about a hierarchical structure with an event-based supervisor in a higher level and a fractional-order proportional integral (FOPI) in a lower level applied to a wind turbine. The event-based supervisor analyzes the operation conditions to determine the state of the wind turbine. This controller operate in the full load region and the main objective is to capture maximum power generation...
This paper presents a versatile test bench for the investigation of the power electronics converter and its control for different wind energy conversion concepts. A three-level back-to-back converter connects a drive train consisting of an induction machine and a synchronous machine to the grid. 4-quadrant operation is feasible on both sides controlling the converter either in 2- or 3-level mode....
Microturbine Units (MTU) are used widely as distributed generators for their proved advantages. This paper presents an interface system for the Microturbine Unit (MTU) based on back-to-back converter to operate in grid connected and islanding modes. Besides regulating the active power fed from the MTU, during the grid-connected mode, the proposed interface system regulates the Point of Common Coupling...
Mitigation of climate change has stimulated an increased penetration of renewable generation into electricity grids. A substantial amount of the future energy mix is projected to come from renewable sources such as offshore wind, but marine energy may be an important contributor due to the great potential of wave and tidal stream generation. Wind and tidal stream turbines feature similarities: electric...
The focus of this paper is to design an active control system that can regulate pitch angle (angle at which blade rotates around its own axis) of the turbine blade. It will vary the mechanical torque input to the generator of a wind energy conversion system and in turn control the power extracted from the wind at a particular wind speed. A small change in pitch has effect on the extraction of available...
In an electric power system, which is one of the most complicated systems among any non-natural systems, Load Frequency Control (LFC) has always been an important and critical issue. Therefore, many configurations of power system model, variety of control strategies and a number of controllers have been proposed in the literature for making LFC more effective, robust, adaptive and efficient. In this...
In this paper, a new generator torque control algorithm is proposed for variable speed-variable pitch wind turbine to extract maximum energy from the wind. In this controller scheme double PI controllers are utilized where conventional wind turbine control systems incorporate single PI controller. The proposed controller structure uses double feedback both from speed and power of the generator to...
Control system developed for hybrid wind diesel system (HWDS) operating as standalone power system is presented. The HWDS consists of a permanent magnet synchronous generator (PMSG) based wind turbine generation system and a diesel generation system (DGS) with synchronous machine. Control system developed for both machine side and load side power converter is simulated. A maximum power point tracking...
Control system developed for hybrid wind diesel system (HWDS) based microgrid is presented. The hybrid system consists of six double fed induction generator (DFIG) based wind turbine generation system, a diesel generation system with synchronous machine and electrical power grid supply. Control system developed for both rotor side and grid side power converter is simulated. A maximum power point tracking...
Characteristics of a small scale wind turbine using Permanent Magnet Synchronous Generator and connected to a grid through a reduced switches count converter (two legs only) are studied in this paper. Active power output corresponding with the input is given with the reactive power produced by the wind turbine regulated at 0 MVAr. Variable wind speed is optimum for drive train performance at 10 m/s...
This paper describes the design of a maximum power point tracking (MPPT) strategy for a variable speed, small scale, wind turbine systems based on a fuzzy logic controller (FLC). The FLC has as input variables the change in mechanical power (ΔPm), the change in rotor speed (Δω), and the sign of ΔPm/Δω. The change of reference generator current (ΔI∗) is the output variable. For small power applications,...
Hydraulic turbine generator system is a coupled system which is composed by mechanical, electrical, hydraulic and other system with time-varying, non-minimum phase characteristics. Active disturbance rejection controller (ADRC) does not depend on an accurate model of the controlled object, can replace PID control technology. In this paper, we use ADRC to control the hydraulic turbine generator system...
Fast and proper synchronization of generation stations is becoming inevitable specially in micro grids. Increased number of small generation units raised total quantity of their synchronization process to the micro grids. This Paper provides improvements in synchronization between an emulated power system and its power generation stations in a laboratory scaled power grid. Three methods including...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design. A complete Bit-Stream based control system for a Doubly Fed Induction Generator (DFIG) is proposed in this paper to demonstrate an entirely hardware-based control system for DFIG applications. A new supervisory control system is proposed to provide excitation,...
This paper specializes the control strategy study for variable speed constant frequency (VSCF) doubly-fed wind turbine generator-MW level, particularly creates their mathematical models of excitation control system of doubly-fed asynchronous motor, rotor-side frequency converter, line-side frequency converter, pitch controller and torque controller, and builds its control workflow of doubly-fed wind...
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