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The paper presents a microgrid energy management strategy (MEMS) for a Medium-Voltage Isolated microgrid, which is China's 10kv island microgrid demonstration project to accommodate the increasing power needs of customers and solve problems of island power supply. When the SOC is restored in security zone, the energy storage system (ESS) would increase the sensitivity and adjust the maximum charging...
This paper presents a discrete time torque observer and an extended H∞ filter to estimate the rotor speed and position in a permanent magnet machine. Those estimated variables are key components of a robust sensorless controller for the machine when it is associated with a wind turbine emulator test-rig. In addition, an iterative maximum power point tracking algorithm is proposed for maximum efficiency...
Water heating applications consume a considerable portion of electricity demand in most of countries. Small wind turbines are one of attractive alternatives for grid electricity based water heating systems. Wind energy can be converted to heat energy in a high efficient manner. However it is essential that wind turbine based water heating systems should be economical and reliable. Maximum power point...
The intermittent and unstable nature of wind raises significant challenges for the operation of wind power systems, either residential installations or utility-scale implementations, necessitating the development of reliable and accurate wind power forecasting techniques. Given that wind speed forecasting is typically considered the intermediate step for wind power forecasting, the present work proposes...
In the wind power application, different asymmetrical types of the grid fault can be categorized after the Y/d transformer, and the positive and negative components of a single-phase fault, phase-to-phase fault, and two-phase fault can be summarized. Due to the newly introduced negative and even the natural component of the Doubly-Fed Induction Generator (DFIG) stator flux during the fault period,...
In this paper, direct matrix converter (DMC) based wind energy systems equipped with Permanent Magnet Synchronous Generators (PMSG) is proposed. To extract the maximum available power from the wind, the Matrix Converter (MC) is controlled using the venturini based algorithm together with the voltage oriented vector control (VOC) scheme to regulate active and reactive power (Power Regulation Technique)...
In this paper the modular multilevel converter (MMC) is proposed as the wind power converter for offshore dc grids. MMC has been widely used for high-power high-voltage applications, and it is able to connect a low ac voltage source to a high dc voltage source, which makes it a promising solution for wind power converter in offshore wind farm dc grids. This paper presents the analysis and design of...
This paper presents an experimental investigation of network frequency stability controlled by wind power plants with doubly fed induction generators without supporting from other conventional power plants in the laboratory scale. The combination of kinetic energy and pitch control methods implemented by many wind turbines in a wind farm and coordinated by a wind farm control center is proposed in...
In this paper, Distribution Static Compensator (DSTATCOM) is proposed for load compensation using photovoltaic (PV) array and Permanent Magnet Synchronous Generator (PMSG) based wind turbine for dc generation; forming hybrid renewable energy sources based dc-link voltage source inverter (VSI). PV is installed along with Perturb and Observe (P & O) maximum power point tracking (MPPT) method applied...
In this paper, a decentralised control approach for an innovative 5 MW wind turbine with a hydrostatic transmission is presented that covers the whole range from low to very high wind speeds. An active damping of tower oscillations is achieved by using the pitch angle as control input. An elastic multibody system is employed to derive a control-oriented model for the first tower bending mode, which...
This paper presents an overview of researches on power system stability with high wind power penetration including analyzing methods and improvement approaches. Power system stability issues can be classified diversely according to different considerations. Each classified issue has special analyzing methods and stability improvement approaches. With increasing wind power penetration, system balancing...
This paper includes the development and validation of a dynamic model suitable for control design and stability analysis of a HVDC diode-based rectifier grid connection for offshore wind power plants. The modular design of the model allows for a relatively easy extension to different grid topologies and control strategies. The developed models include the effects of communication delays and a non-stationary...
This paper presents and discusses dynamic simulation of a wind farm incorporated with highly-resolved wind prediction data. The wind farm is comprised of twenty 3 MW direct drive synchronous generators arranged in two arrays and connected to an infinite bus representing the commercial grid. Each generator is equipped with a full-scale power converter and a pitch angle controller. The wind farm receives...
This paper presents a novel stand-alone power system using a three to four phase matrix converter (MC) for use with renewable energy sources such as a micro hydro turbine or a tiny wind turbine with a permanent magnet synchronous generator (PMSG). MCs are able to convert AC power to AC power directly without using DC link capacitors, and AC to DC conversion is also possible because DC is considered...
In this paper a new offshore wind energy power conversion architecture with grid integration using HVDC link is presented. Multi-MW multiple three-phase winding Permanent Magnetic Synchronous Generators (PMSG) captures the offshore wind energy. Each of the three-phase winding of PMSG are connected to Current Source Converters (CSC) that are controlled by MPPT. The outputs of these CSCs are series...
Increasing worldwide demand for energy has made wind energy a forerunner as a renewable energy resource. Due to this, and due to the intermittent nature of wind, Wind Turbines (WT) reliability should be considered. Improving the reliability of a WT translates into reduced operation and maintenance cost. This highlights the aim of this paper which is a technical review on WTs critical failures as well...
The goal of this paper is to investigate the application of nonlinear control technique to a multi-input multi-output (MIMO) nonlinear model of a wind energy battery-storage system using a permanent magnet synchronous generator (PMSG). The challenge is that the system should operate in both grid-connected and standalone modes while ensuring a seamless transition between the two modes and an efficient...
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