Solid state transformer interfaced wind energy system with integrated active power transfer, reactive power compensation and voltage conversion functions

2012 ◽  
Author(s):  
Xu She ◽  
Fei Wang ◽  
Rolando Burgos ◽  
Alex Q. Huang
Keyword(s):  
Solid State ◽  
Wind Energy ◽  
Reactive Power ◽  
Energy System ◽  
Reactive Power Compensation ◽  
Active Power ◽  
Power Transfer ◽  
Solid State Transformer ◽  
Wind Energy System ◽  
Voltage Conversion

scholarly journals Design and Simulation of a Unified Power Quality Conditioner by Fuzzy Logic for Egyptian Power Grid Connected to Zafarana Egypt Wind System

2019 ◽  
Vol 4 (9) ◽  
pp. 1-8
Author(s):  
Montaser Abd El Sattar ◽  
Adel A. Elbaset ◽  
Ali H. KasemAlaboudy ◽  
Wessam Arafa Hafez
Keyword(s):  
Wind Energy ◽  
Power Quality ◽  
Reactive Power ◽  
Power Grid ◽  
Energy System ◽  
Wind System ◽  
Unified Power Quality Conditioner ◽  
Wind Energy System ◽  
Power Quality Conditioner

Wind energy system is lately receiving a lot of attention, because they are cost inexpensive, environmental safe and clean renewable energy source, as compared with nuclear and fossil fuel power generation. The operational characteristics of wind electric turbines has considerable dissatisfaction and stress on the quality of electric power system. Harmonics, variations of voltage and reactive power are most of power quality issues for grid connected with wind turbine. This paper introduces a design and simulation of unified power quality conditioner using a fuzzy controller to improve the power quality for Egyptian power grid connected to Zafarana Egypt wind system. The proposed performance of the unified power quality conditioner system is verified by simulating the model using MATLAB/SIMULINK environment. The simulation results showed that the proposed unified power quality conditioner provide efficient cancellation of both load current  harmonics  and supply voltage sag in addition to compensation of reactive power, and thus making the electrical grid connected wind energy system more efficient by improving the quality of power.

scholarly journals Small Scale Stability of Isolated Rural Microgrid Based on Load Characteristics

2020 ◽  
Vol 9 (2) ◽  
pp. 327-334
Keyword(s):  
Wind Energy ◽  
Rural Areas ◽  
Reactive Power ◽  
Energy System ◽  
Input Power ◽  
System Stability ◽  
Small Scale ◽  
Frequency Change ◽  
Wind Energy System ◽  
Aggregate Index

Rural areas are either weakly connected to grid or have no grid access. Therefore, hybrid system is only solution for continuous undisrupted power supply. Also these rural microgrids have specific types of load. Small systems are more vulnerable to load disturbances and therefore, frequency and voltage variation have post disturbance effect on the system stability. Four different types of loads having exponential voltage and frequency characteristics are considered for the study. EPRI Load modeling has been considered based on aggregate index calculation. The system is studied for step increase/decrease in load as well as input power to the wind energy system and also the post effect of voltage & frequency change on the load with its influence on the system is considered for study purpose. The isolated microgrid proposed has wind energy system with PMSG and biogas genset (BG) with synchronous generator (SG). The system is designed in such a way that any increase/decrease in load and input power to wind is taken up by the biogas system. No additional reactive power compensator is envisaged. Accordingly, the controllers are tuned using Integral Square Error criterion for mitigate variation in load voltage & frequency.

scholarly journals Study of Grid Connected Wind Energy System with Fuzzy Logic Based MPPT Controller

2018 ◽  
Vol 7 (4) ◽  
pp. 251
Author(s):  
Jayalakshmi N. S ◽  
Sachin S
Keyword(s):  
Fuzzy Logic ◽  
Wind Energy ◽  
Fuzzy Logic Controller ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Voltage Regulation ◽  
Control Technique ◽  
Point Tracking ◽  
Wind Energy System

<p>Renewable energy sources (RESs) are gaining more importance due to depleting fossil fuel sources in few decades. When compared to other RESs wind energy system is widely available and user friendly in nature. This paper presents modelling and simulation of grid connected PMSG based wind energy conversion system with P&amp;O maximum power point tracking (MPPT) control technique.  The PQ controller is used for grid tied inverter to exchange real and reactive power with DC bus voltage regulation. The fuzzy logic controller (FLC) is used for MPPT implementation as it provides better performance as compared to the traditional PID controllers. The various case studies are considered for power management between wind system and the utility grid and the results are evaluated in MATLAB/ Simulink platform.</p>

scholarly journals Wind Energy Fed UPQC System for Power Quality Improvement

2018 ◽  
Vol 7 (3) ◽  
pp. 495-504
Author(s):  
Sarita Samal ◽  
Prakash Kumar Hota
Keyword(s):  
Wind Energy ◽  
Power Quality ◽  
Reactive Power ◽  
Voltage Drop ◽  
Energy System ◽  
Quality Analysis ◽  
Matlab Simulation ◽  
Wind Energy System ◽  
Power Quality Improvement ◽  
Quality Controller

The extensive use of non-linear loads in domestic, industrialand commercial services origin harmonic complications.Harmonics make malfunctions in profound equipment, voltage drop across the network, conductor heat increases and overvoltage through resonance. All these problems can be remunerated by using Unified Power Quality Controller (UPQC) and the operation of UPQC depends upon the available voltage across capacitor present in dc link. If the capacitor voltage is maintained constant then it gives satisfactory performance. The proposed research is basically on designing of Wind energy fed to the dc link capacitor of UPQCso as to maintain propervoltageacross it and operate the UPQC for power quality analysis. The proposed technique is the grouping of shunt and series Active Power Filter (APF) to form UPQC which is fed wind energy system and connected to grid for better response in the output. In this paper, the simulation model of series APF, shunt APF, UPQC and Wind energy with UPQC are design in Matlab. The proposed Wind energy-UPQC is design in Matlab simulation for reduction of voltage sag, swell, harmonics in load current and compensation of active and reactive power.

Performance Analysis of a Solid State Transformer for Smart Grid

2013 ◽  
Vol 441 ◽  
pp. 174-177 ◽  
Author(s):  
Yang Liu ◽  
Da Hai Zhang ◽  
De Da Sun
Keyword(s):  
Solid State ◽  
Power Supply ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Dynamic State ◽  
Solid State Transformer ◽  
Control Scheme ◽  
Control Schemes ◽  
Power Quality Improvement ◽  
And Control

Solid State Transformer (SST) has many attractive characteristics, including power quality improvement and reactive power compensation. The paper investigates the topology and control schemes of SST, and discusses its flexibility and reliability for both grid and customers. A model of SST applied for distribution network is constructed, and simulation shows the SST with appropriate control scheme can provide excellent power supply during both steady-state and dynamic-state with varying load.

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