scholarly journals Filter Extracted Sliding Mode Approach for DC Microgrids

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1882
Author(s):  
Abdul Rehman Yasin ◽  
Amina Yasin ◽  
Mudassar Riaz ◽  
Muhammad Ehab ◽  
Ali Raza
Keyword(s):  
Renewable Energy ◽  
High Efficiency ◽  
Power Transmission ◽  
Sliding Mode ◽  
Voltage Regulation ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrids ◽  
Load Variations ◽  
Improved Stability

The advantages offered by DC microgrids, such as elimination of skin effect losses, no requirement of frequency synchronization and high efficiency for power transmission are the major reasons that microgrids have attracted the attention of researchers in the last decade. Moreover, the DC friendly nature of renewable energy resources makes them a perfect choice for integration with DC microgrids, resulting in increased reliability and improved stability. However, in order to integrate renewable energy resources with the DC microgrids, challenges like equal load sharing and voltage regulation of the busbar under diverse varying load conditions are to be addressed. Conventionally, droop control with PI compensation is used to serve this purpose. However, this cascaded scheme results in poor regulation to large load variations and steady state errors. To address this issue, this paper presents a sliding mode control-based approach. Key features of SMC are its ease of implementation, robustness to load variations, and fast dynamic response. The system model is derived and simulated to analyze the stability and performance of the proposed controller. An experimental test bench is developed to demonstrate the effectiveness of SMC against modeled dynamics and is compared with the droop controller. The results show an improvement of 26% and 27.4% in the rise time and settling time, respectively. Robustness of the proposed scheme is also tested by switching it with a step load and an improvement of 40% has been observed.

scholarly journals Optimal operation of hybrid AC/DC microgrids under uncertainty of renewable energy resources: A comprehensive review

2019 ◽  
Vol 109 ◽  
pp. 139-159 ◽  
Author(s):  
Motahareh Pourbehzadi ◽  
Taher Niknam ◽  
Jamshid Aghaei ◽  
Geev Mokryani ◽  
Miadreza Shafie-khah ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Optimal Operation ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Comprehensive Review ◽  
Dc Microgrids

scholarly journals A Fuse Saving Scheme for DC Microgrids With High Penetration of Renewable Energy Resources

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 137407-137417 ◽  
Author(s):  
Navid Bayati ◽  
Hamid Reza Baghaee ◽  
Amin Hajizadeh ◽  
Mohsen Soltani
Keyword(s):  
Renewable Energy ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrids ◽  
High Penetration

Fault Analysis and Protection of Low-Voltage DC Microgrid Equipped by Renewable Energy Resources

2022 ◽  
pp. 978-1012
Author(s):  
Navid Bayati ◽  
Amin Hajizadeh ◽  
Mohsen Soltani
Keyword(s):  
Renewable Energy ◽  
Low Voltage ◽  
Fault Analysis ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Dc Microgrid ◽  
Dc Microgrids ◽  
Ring Configuration ◽  
Protection Method ◽  
And Mathematics

This chapter consists of two sections, ‘Modelling of DC Microgrids' and ‘Protection of DC Microgrids'. In the first section, the new developments in DC Microgrids are discussed. Then, the Modelling of renewable energy resources-based DC Microgrid using characteristics and mathematics equations of each component are presented and then they are simulated by MATLAB. Afterward, the fault analysis and fault current behavior of the studied DC Microgrid are investigated. In the second section, a method of protecting the DC Microgrid and locating the fault in different parts of the system is proposed. The proposed method protects DC Microgrid using localized protection devices. And, the effectiveness of the proposed protection method is validated in a DC Microgrid with ring configuration.

Fixed frequency sliding mode control of renewable energy resources in DC micro grid

2019 ◽  
Vol 21 (4) ◽  
pp. 2074-2086 ◽  
Author(s):  
Abdul Rehman Yasin ◽  
Muhammad Ashraf ◽  
Aamer Iqbal Bhatti ◽  
Ali Arshad Uppal
Keyword(s):  
Renewable Energy ◽  
Sliding Mode Control ◽  
Sliding Mode ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Fixed Frequency ◽  
Mode Control ◽  
Micro Grid

scholarly journals APPLICATION OF HVDC SYSTEMS FOR RES INTEGRATION AND POWER TRANSMISSION FROM THE PROFICIT SOUTH PART OF THE IES OF UKRAINE

2021 ◽  
Vol 2021 (59) ◽  
pp. 36-42
Author(s):  
V.V. Pavlovskyi ◽  
◽  
A.V. Prykhodko ◽  
Keyword(s):  
Renewable Energy ◽  
Power Output ◽  
Power Transmission ◽  
Alternating Current ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Surplus Energy ◽  
Res Integration ◽  
Current Lines ◽  
Corresponding Analysis

The analysis and estimation of advantages from implementation of HVDC systems in parallel to the loaded alternating current lines as a means of solving the problem of power output from surplus energy regions of the IES of Ukraine was presented. Such regions arise with the active development of new Renewable Energy Resources (RES). Two variants of installation of such systems are proposed and the corresponding analysis of electrical modes of IES of Ukraine with reliability criteria "N-1" was executed. References 11, figures 4, table 1.

scholarly journals Effect of Distributed Wind Generation on the Voltage Sag of Distribution Networks

2019 ◽  
Vol 8 (4) ◽  
pp. 1884-1889
Keyword(s):  
Renewable Energy ◽  
Distribution Systems ◽  
Short Circuit ◽  
Distribution Network ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Energy Resources ◽  
Wind Generation ◽  
Voltage Sag ◽  
Renewable Energy Resources

As the issue of global warming is worsening, the shift towards using renewable energy resources is becoming more of an obligation rather than an option. With the continual decline in the cost of distributed small and medium-scale renewables and government sponsored programs, the outlook of growth of these converter-based resources remain high. Renewable energy resources are connected at the end-user terminals, in close proximity to the load at the distribution network. Such connection in the locale brings perceived benefits of transmission loss reduction, increased energy efficiency and improved voltage regulation. Yet, distributed renewable generation have noticeable effects on system’s power quality. This paper investigates the impacts of distributed wind generation on the voltage sag of distribution systems. A systematic approach is constructed to capture voltage sag occurrence incidents, due to wind generation connected at distribution nodes, and trigger the dynamic voltage restorer (DVR) into active operation mode to rectify the voltage sag problem. A test feeder system is represented using MATLAB/Simulink with wind turbines connected at several nodes of the system. A model for the DVR is developed in Simulink. It was then integrated with the test feeder system. Simulation results show that the incorporation of increased proportions of wind generation into the distribution network may give rise to negative operating conflicts as far as the voltage sag is concerned. Results manifest that the DVR is capable of effective correction of the voltage sag, caused by a three phase short-circuit fault, in presence of high penetration levels of variable wind generation connected at disparate locations in the distribution network.

scholarly journals Validation of photovoltaics powered UPQC using ANFIS controller in a standard microgrid test environment

2022 ◽  
Vol 12 (1) ◽  
pp. 92
Author(s):  
Sumana S ◽  
Dhanalakshmi R ◽  
Dhamodharan S
Keyword(s):  
Renewable Energy ◽  
Power Quality ◽  
Power Supply ◽  
Fuzzy Inference ◽  
Voltage Drop ◽  
Voltage Regulation ◽  
Energy Resources ◽  
Renewable Energy Resources ◽  
Test Environment ◽  
Inference System

The power quality improvement becomes one of the important tasks while using microgrid as main power supply. Because the microgrid is combination of renewable energy resources. The renewable energy resources are intermittent in power supply and at the peak loading condition it has to supply the required power. So, the power quality problems may increase in that time. Out of all power quality issues the voltage drop and harmonic distortion is considered as the most serious one. In recent years unified power quality conditioner (UPQC) is emerged as most promising device which compensates both utility as well as customer side power quality disturbances in effective way. The compensating potentiality used in the UPQC is limited by the use of DC link voltage regulation and the conventional proportional integral (PI) controller. In this paper the compensating potentiality of the UPQC device is controlled by an adaptive neuro fuzzy inference system (ANFIS) control and it is powered from the available photovoltaics (PV) power generation. The effect of adding an intelligent UPQC is tested in the standard IEEE-14bus environment. MATLAB 2017b is used here for testing and plotting the simulation results.

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