This paper presents a new operational strategy for small scale wind farm which is composed of both fixed and variable speed turbine generator systems (WTGS). Fixed generators suffer greatly from meeting the requirements grid code, because they are largely dependent on reactive power. Integration flexible ac transmission (FACTS) devices solution to overcome that problem, though it definitely increases overall cost. Therefore, in this paper, we focuses topology, where series or parallel...

This paper proposes a control strategy of doubly fed induction generators (DFIGs) with new protection schemes for enhancing fault ride through capability wind farms composed DFIGs and (IGs). Since the will be stressed or overloaded in process stabilizing farm during grid fault, it is paramount to consider scheme DFIG, order protect its power converters. Two schemes, dc-link chopper-controlled braking resistor supplementary rotor current (SRC) side converter DFIG series dynamic (SDBR)...

A huge number of wind generators are going to be connected with the existing network in near future. Therefore it is necessary analyse transient stability power systems, including turbine generator systems (WTGS). It has already been reported that one-mass or lumped model system insufficient behaviour WTGS. also for precise analysis WTGS, a six-mass drive train needed. The reduced order models (three-mass and two-mass) have adopted so far analysis. But using six-mass, three-mass two-mass not...

This paper presents operation and control strategies of an offshore wind farm interconnected to a high-voltage dc (HVDC) system. The composed variable speed turbines driving permanent magnet synchronous generators is considered in this study, based on dc-bus concept. HVDC transmission system three-level neutral point clamped voltage source converter (VSC) used for the interconnection between onshore grid. Detailed modeling are developed individual component overall A simple fuzzy logic...

This paper presents a system using an energy capacitor (ECS) to smoothen the output power fluctuation of variable-speed wind farm. The turbine driving permanent-magnet synchronous generator is considered be connected ac network through fully controlled frequency converter. detailed modeling and control strategy converter as well operation are demonstrated. Afterward, suitable economical topology ECS composed current-controlled voltage-source inverter, dc-dc buck/boost converter, electric...

This paper presents a new method to enhance the transient stability of multimachine power system including wind farms, when severe network disturbance occurs in system. For this purpose, energy capacitor (ECS) composed electronic devices and electric double layer (EDLC) is proposed. The control scheme ECS based on sinusoidal PWM voltage source converter (VSC) fuzzy logic controlled dc-dc buck/boost using insulated gate bipolar transistors (IGBT). Two farms are considered be connected...

The energy capacitor system (ECS), composed of power electronic devices and electric double layer to enhance the low voltage ride through (LVRT) capability fixed speed wind turbine generator (WTGS) during network disturbance, is discussed. Control scheme ECS based on a sinusoidal pulse width modulation source converter DC–DC buck/boost insulated gate bipolar transistors. Two-mass drive train model WTGS adopted because modelling has great influence characteristics fault. Extensive analysis...

This paper proposes a fuzzy-logic-controlled superconducting magnetic energy storage (SMES) scheme for the stabilization of grid-connected wind-generator systems. The control SMES is based on sinusoidal pulsewidth-modulation voltage-source converter and two-quadrant dc-dc chopper using an insulated-gate bipolar transistor. A comparative study carried out between proposed fuzzy-logic-based pitch controller to improve wind- generator stability. Simulation results demonstrate that performance...

This paper aims at investigating the effect of coordination fuzzy logic-controlled superconducting magnetic energy storage (SMES) and optimal reclosing on transient stability in a simulated multi-machine power system during unsuccessful circuit breakers. The performance coordinated operation SMES is compared to that conventional auto-reclosing. Also, an alternative static nonlinear controlled SMES. control scheme based pulse width modulation (PWM) voltage source converter (VSC) two-quadrant...

Recently interest in photovoltaic (PV) power generation systems is increasing rapidly and the installation of large PV or groups that are interconnected with utility grid accelerating. To maintain stability due to huge penetration grid, much stricter codes being imposed by energy regulatory bodies. This paper discusses detailed modeling control strategies a scale connected system can help augment low voltage ride thorough capability DC based plant. It should be noted side inverter plays an...

This paper presents a combination system of wind energy conversion and hydrogen production. Hydrogen is expected as an alternative source in the future, this best way to produce it from renewable like energy. On other hand, output generator, general, fluctuates greatly due speed variations, thus fluctuations can have serious influence on power operation. In proposed system, variable generator adopted, electrolyzer installed parallel with for Output smoothed supplied well based cooperative...

Frequency fluctuations are a major concern for transmission system operators and power grid companies from the beginning of operation due to their adverse effects on modern computer-controlled industrial systems. Because huge integration wind into grid, frequency becoming serious problem, where randomly varying causes system. Therefore, in this paper, minimisation fluctuation system, including farm, is proposed using an energy capacitor (ECS). A scaled-down, multi-machine model Hokkaido...

This paper presents a fuzzy logic-controlled superconducting magnetic energy storage (SMES) to improve the transient stability of an electric power system. In order see how effective proposed controlled SMES in improving is, its performance is compared that conventional proportional-integral (PI) SMES. Furthermore, comparative study between and braking resistor (BR) carried out. Simulation results show better than PI Again, BR. Finally, it can be concluded provides very simple means...

Due to the recent expansion of renewable energy applications, wind conversion is receiving much interest all over world. However, output fluctuations generators cause network frequency variations in power systems. This can decrease quality and then a restriction farm installation, especially an isolated system, for example, system small island. Therefore problem fluctuation needs be solved expanding further conversion. paper proposes application flywheel storage (FESS) with improving...

WPGS (Wind Power Generation System) output fluctuates due to wind speed variations and PV power generation is changed by sudden cloudy weather conditions. Hence, if a large number of generators are connected system, their can cause serious influence on the system operation, that is, frequency voltage fluctuations. In order solve these problems, control generator fluctuations very important. With points as background, Superconducting Magnetic Energy Storage (SMES) probably key technology...

This paper presents simplified models to represent a grid connected wind farm composed of variable speed turbines with Doubly Feed Induction Generator (DFIG) and Permanent Magnet Synchronous (PMSG) for dynamic simulation study. Aim the is diminish complexity time analysis farm. The proposed can be used as an aggregated individual generator model representations. Simulation analyses in domain have been performed steady state transient scenarios demonstrate accuracy model. Comparative between...

Induction machines are mostly used as generators in wind power stations. Since induction also have a stability problem, it is important to analyze the transient of system including This paper presents simulation analyses an generator performed by PSCAD/EMTDC.

In order to investigate the impacts of integration wind farms into utilities networks, it is necessary analyze transient characteristic power generation system (WPGS). most cases, seen that simple one-mass lumped model considered for stability analysis generator. But sake exact WPGS, needed consider multi-mass shaft model. this study a detailed has been done with consideration two-mass generator when severe network disturbance occurs in system. Moreover, an online logical pitch controller...

Recently, wind energy conversion system using a Doubly-Fed Synchronous Generator (DFSG) has attracted an interest. This can control rapidly real and reactive power output independently by secondary AC excitation. Furthermore, since turbine be operated in variable speed, fluctuations of the due to changing speed short period reduced. paper proposes new method for this enhance transient stability neighboring induction generators same farm.

The recent trend of wind power generation is to use variable speed turbine (VSWT) driving a doubly fed induction generator (DFIG), or permanent magnet synchronous (PMSG). Among them stability analyses DFIG type VSWT have already been reported in many literatures. But transient analysis for not sufficient enough. This paper focuses on the PMSG (VSWT-PMSG), where during symmetrical and unsymmetrical faults analyzed.

Recently voltage-source or current-source inverter based various FACTS devices have been used for flexible power flow control, secure loading, damping of system oscillation and even the stabilization wind energy generation. In this paper, we propose static synchronous compensator (STATCOM) on voltage source converter (VSC) PWM technique to stabilize grid connected generator system. A simple control strategy STATCOM is adopted where only measurement rms at terminal needed. Fuzzy logic...