A New Control Method to Mitigate Power Fluctuations for Grid Integrated PV/Wind Hybrid Power System Using Ultracapacitors

2016 ◽  
Vol 17 (4) ◽  
pp. 451-461 ◽  
Author(s):  
N. S. Jayalakshmi ◽  
D. N. Gaonkar
Keyword(s):  
Solar Wind ◽  
Output Power ◽  
Hybrid System ◽  
Transient Stability ◽  
Control Method ◽  
Storage System ◽  
Operating Conditions ◽  
Solar Irradiation ◽  
Power Fluctuations ◽  
Utility Grid

Abstract The output power obtained from solar-wind hybrid system fluctuates with changes in weather conditions. These power fluctuations cause adverse effects on the voltage, frequency and transient stability of the utility grid. In this paper, a control method is presented for power smoothing of grid integrated PV/wind hybrid system using ultracapacitors in a DC coupled structure. The power fluctuations of hybrid system are mitigated and smoothed power is supplied to the utility grid. In this work both photovoltaic (PV) panels and the wind generator are controlled to operate at their maximum power point. The grid side inverter control strategy presented in this paper maintains DC link voltage constant while injecting power to the grid at unity power factor considering different operating conditions. Actual solar irradiation and wind speed data are used in this study to evaluate the performance of the developed system using MATLAB/Simulink software. The simulation results show that output power fluctuations of solar-wind hybrid system can be significantly mitigated using the ultracapacitor based storage system.

scholarly journals Transient Stability Analysis of the Two-Area With AC/DC Paralleled Interconnected Power System in Different Operation

2021 ◽  
Vol 9 ◽  
Author(s):  
Hongbo Liu ◽  
Shuyu Zhang ◽  
Li Sun ◽  
Chong Zhang ◽  
Xiaoyu Peng
Keyword(s):  
Hybrid System ◽  
Transient Stability ◽  
Stability Margin ◽  
Operating Conditions ◽  
Control Cost ◽  
Parallel Transmission ◽  
Transient Characteristics ◽  
Interconnected Power System ◽  
Angle Stability ◽  
Rotor Angle Stability

In order to deeply explore the transient stability mechanism of the AC/DC hybrid system, this paper analyzes the rotor angle stability of the two-area AC/DC hybrid system. The system is analyzed after subjecting it to large disturbances in the AC system and for different operating conditions, qualitatively and quantitatively. The influence of factors, such as the AC operating point of the system and the proportion of DC transmission power, have been considered for improving the rotor motion equation. Subsequently, the transient characteristics of the hybrid system are analyzed after being subjected to disturbances. The power angle stability margin index is obtained, based on which the transient characteristics after DC blocking are analyzed, and the coordinated control strategy with the least control cost is proposed. The results are verified using the two-area AC/DC parallel transmission system network model. The study provides the reference for ensuring the security and stability of the hybrid AC/DC power grid.

scholarly journals A Study on Hybrid DC Micro-Grid System

IJOSTHE ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 7
Author(s):  
Ritu Gupta ◽  
Amit Shrivastava
Keyword(s):  
Power Generation ◽  
Hybrid System ◽  
Large Scale ◽  
Transient Stability ◽  
Research Work ◽  
Energy System ◽  
Stable Operation ◽  
Hybrid Renewable Energy System ◽  
Economical System ◽  
Utility Grid

With the growing demand of electricity, deployment of microgrid is becoming an attractive option to meet the energy demands. At present, large-scale wind/solar hybrid system is of great potential for development. The large-scale wind/solar hybrid system is of higher reliability compared with wind power generation alone and solar power generation alone However, a grid connected microgrid suffers a crucial stability issues during a fault in utility grid. For stable operation of microgrid during fault in grid. In this paper transient stability of the microgrid is studied during fault in utility grid. This research work presents the design and implementation of a hybrid renewable energy system that allows a cost-efficient and sustainable energy supply of the loads. The integration of the solar system with the network is rather complex and expensive. With this construction proposal, however, it is not only possible to create an economical and simple hybrid system, but also a reliable, efficient and economical system.

scholarly journals Design and Implementation of Hybrid Solar Wind Energy Tower

2019 ◽  
Vol 9 (2S4) ◽  
pp. 556-558
Keyword(s):  
Solar Wind ◽  
Renewable Energy ◽  
Solar Energy ◽  
Wind Energy ◽  
Output Power ◽  
Hybrid System ◽  
Solar Panel ◽  
Monthly Average ◽  
Design And Implementation ◽  
Solar Wind Energy

The proposed method might be a possible key to the combination of high levels of radiation by solar energy and speed of the wind on a monthly average basis. Wind Energy Tower (WET) and Hybrid Solar (HS) is combined to form the HSWET system and the function of solar panel in parallel with wind turbines thereby acquiring a higher total of renewable energy values. It is essential to measure the output power and monitor it regularly. And also the design of HSWET was being paralleled with an prevailing solar hybrid system have made changes from a single solar panel to a tree like structure which includes for solar panel to get more output power than before and the results of the proposed Hybrid Solar and Wind Energy Tower system resulted in a greater efficiency.

Sign in / Sign up

Export Citation Format

Share Document