scholarly journals Integration of DC Microgrid with Existing System

2021 ◽  
Vol 9 (VI) ◽  
pp. 3034-3036
Author(s):  
D. Jayanth
Keyword(s):  
Power Quality ◽  
Energy Generation ◽  
Dc Microgrid ◽  
Micro Grid ◽  
Ac Microgrid

Modern trends of power circle are swiftly tending towards more sensitive form of energy generation to sustain the sensitive loads like electric-powered, commercial loads. By integrating the DC microgrid, we can increase the quality of power. DC microgrid has good use rather than AC microgrid. DC microgrid is the best solution to the raised problems like reliability, stability and efficiency of the existing system. That's why here we integrating DC micro grid for good power quality.

An Application of Unified Power Quality Conditioner for Micro-Grid

2013 ◽  
Vol 380-384 ◽  
pp. 3149-3154
Author(s):  
Han Guo Yu ◽  
Jian Ru Wan ◽  
Ran Liu
Keyword(s):  
Power Quality ◽  
Tracking Control ◽  
Control Method ◽  
Control Program ◽  
Nonlinear Load ◽  
Unified Power Quality Conditioner ◽  
New Energy ◽  
Micro Grid ◽  
Power Quality Conditioner

According to the power quality problems of micro-grid, this paper presents a control program of the Unified Power Quality Conditioner (UPQC) to improve the micro-grid power quality.The shunt side of UPQC is used to eliminate the harmonic current brought by nonlinear load into the micro-grid. And the conditioner series part is used to suppress distributed new energy generation intermittence. In the paper synchronous coordinate transformation is used to detect compensated components and tracking control method is adopted to control the converter. The simulation results demonstrate the effectiveness of the UPQC on improving the power quality of the micro-grid.

The Simulation Logic of Micro-Grid Power Supply Planning

2013 ◽  
Vol 838-841 ◽  
pp. 3277-3282
Author(s):  
Zhong Jing Liu ◽  
Shuang Wen Wang ◽  
Xue Feng Dong ◽  
Jun Liang Cui ◽  
Tingting Fu ◽  
...  
Keyword(s):  
Power Quality ◽  
Power Supply ◽  
Micro Grid ◽  
Supply Planning ◽  
Grid Planning

As micro-grid technology's development, it has played an important role in improving the diversity and power quality of power supply. Micro-grid power supply planning is an important part of the micro-grid planning, the paper describes two different micro-grid power supply planning simulation logic, to provide some reference ideas for the micro-grid power supply planning simulation.

Micro-Grid Power Quality Management

2015 ◽  
Vol 713-715 ◽  
pp. 1335-1342
Author(s):  
Zhi Qiang Gao ◽  
Hua Yu Chu ◽  
Liang Meng ◽  
Si Qing Sheng ◽  
Zhong Ji Sun ◽  
...  
Keyword(s):  
Power Quality ◽  
Control Method ◽  
Active Power Filter ◽  
Active Power ◽  
Grid Technology ◽  
Power Filter ◽  
Micro Grid ◽  
Simulation Results ◽  
The Impact

As distribute power generation and micro-grid technology develops, more and more researchers attach importance to the problems of power quality in micro-grid, especially the problem of harmonic. This paper describes the impact and harm harmonic has on the power quality of the power grid. It introduces a revised method of managing micro-grid harmonics which uses an active power filter (APF), and the control method of APF is different from the traditional one. It also establishes the simulation model of micro-grid, analyze the simulation results and experiment in actual micro-grid to verify the effectiveness of the proposed method.

scholarly journals PQ improvement of Micro-Grid by Using DG and Power Quality Conditioner with BESS

2018 ◽  
Vol 7 (2.32) ◽  
pp. 245
Author(s):  
Chandra Sekhar Mishra ◽  
Ranjan Kumar Jena ◽  
Soumya Ranjan Nayak
Keyword(s):  
Power Quality ◽  
Power Converter ◽  
Resistive Load ◽  
Solar Pv ◽  
Matlab Simulink ◽  
Micro Grid ◽  
Dc Bus ◽  
Bus Voltage ◽  
Power Quality Conditioner

DG Grid interfaced system has been focused through this paper. The objective is to improve power quality of the grid, which was polluted by various means. The improvement of power quality of the micro grid includes uses of a specially designed DG, BESS and Power Quality conditioner. The system consists of a two-stage power conversion. Solar PV supplies power for both DC and AC loads. Manufacturer datasheet is used for modeling the PV panel. In order to keep the BUS voltage stable a BESS is joined to DC BUS through power electronic converter, which is used to absorb the excess power whenever production is high and deliver power to the load on low production. The system continues to supply the local loads, incase of grid discontinuity. Thus it eliminates threats of islanding. This paper also focuses on control and stability of DC bus voltage and energy management scheme. The project uses Matlab/Simulink platform for efficient verification. For power quality improvement of Micro Grid it uses 3leg inverter, which is coupled with SPV and MPPT with Battery storage, which is used as compensator for the whole system. For prevention to reduce voltage current and power flow between DG and Grid, it is necessary to have an optimum control. Through the adjustment of power circulation between shunt paired DG ensures current voltage and power on micro grid. +ve, -ve and Zero sequence components of currents and voltage can be adjusted   by the suggested methodology in Grid tied DG system. The said PQC have multiple uses. Firstly as a power converter and secondly as a shunt APF for harmonic compensation on voltage, current and power (both active and reactive) for both balanced and unbalanced loads in the Grid tied DG system. It also cares for the neutral conductor. Either individually or in grid connected mode all the above objectives can be achieved. For the entire Grid, it is realized that after compensation three phase four wired un-balance loads looks as balanced linear resistive load for the Grid. All these task significantly replicated on MATLAB/Simulink. After compensation the total harmonic distortion on input voltage and current reduced drastically. IEEE519 in the range of 5% suitably accepts it.  

scholarly journals Improvement of Power Quality in Multi-Terminal Hybrid Ac/Dc Microgrid by using Fuzzy Logic Controller

2019 ◽  
Vol 8 (2) ◽  
pp. 5604-5611
Keyword(s):  
Fuzzy Logic ◽  
Power Quality ◽  
Fuzzy Logic Controller ◽  
Fuzzy Controller ◽  
Paper Analysis ◽  
Dc Microgrid ◽  
Grid Current ◽  
Current Controller ◽  
Zero Sequence ◽  
Micro Grid

In this paper analysis of 3-Terminal and 5- Terminal hybrid(cross breed) micro grid using Fuzzy logic controller is proposed. The cascaded H-bridge interfaces between supply and DAB converter. The DAB(Dual Active Bridge) converter connects between cascaded H-bridge and load. By using Zero sequence voltage (ZSV) and inner current controller improvement in grid current and voltage balance are achieved. To boost the grid current and unbalance voltage, 49 ruled fuzzy controller based scheme is used. The analysis of the concept mainly deals with maintenance of power quality and uninterruption in power supply by tuning and Fuzzy logic controlling. The cascaded H-bridge hybrid micro grid with 3- terminal or 5 terminal would have better performance only if there is balanced voltage as well uninterrupted grid current. Fuzzy logic based controller performances are analyzed through simulation results.

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