scholarly journals A Protection System for Improved Ring-Bus DC Microgrids

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3778
Author(s):  
Zhang ◽  
Chen ◽  
Xie ◽  
Zheng
Keyword(s):  
Simulation System ◽  
Fault Isolation ◽  
Protection System ◽  
System Structure ◽  
System Control ◽  
Power Electronic ◽  
Electronic Components ◽  
Dc Microgrids ◽  
Local Protection ◽  
Bus System

An improved system structure and a corresponding protection system are proposed in this paper, which aims at providing future DC microgrids with suitable protection ideas. At first, the ring-bus system is adjusted to balance the system control and protection and make the system more conventional for the equipment expansion. In addition, based on this structure, a protection system is established. It consists of two parts, which are local protection and pilot centralized protection. The local protection is designed for protecting the vulnerable power electronic components in converters and the pilot protection is mainly proposed for the fault isolation. The combination between two parts makes the whole system overcome the contradiction between protection speed and reliability and the method also takes the protection suitability into consideration. Finally, all the methods are verified by the simulation system based on the PSCAD /EMTDC.

An Efficient Method for Motor Protection System Control Using Labview

2014 ◽  
Vol 4 (1) ◽  
pp. 43-50
Author(s):  
Abhay Kumar Singh ◽  
Shabbiruddin
Keyword(s):  
Fault Detection ◽  
Efficient Method ◽  
Motor System ◽  
Research Work ◽  
Protection System ◽  
System Control ◽  
Large Motor ◽  
And Control ◽  
Motor Protection ◽  
Financial Losses

The need for a motor protection system can be well understood by the fact that motors are integral device in any of the present day industries. Malfunctioning or any other faults in motor can halt the functioning of such industries. This can cause huge financial losses. So an efficient motor protection system is necessary. The present research work deals with the application of Labview for motor protection system, which can constantly monitor and control, a large motor system. This paper presents a highly reliable approach towards protection of commonly used motors. Here we deal with different kinds of motor faults and detection of all these faults using NI LABVIEW™. The present paper will not only be helpful for industrial purposes but it can also be helpful for students to understand motor fault detection. The LABVIEW has been successfully applied to make an efficient motor protection system.

scholarly journals A Modified Modular Multilevel Converter with Reduced Number of Power Electronic Components

2015 ◽  
Vol 38 (1) ◽  
pp. 1-8
Author(s):  
I.A. Harbi ◽  
Haitham Z. Azazi ◽  
Azza E. Lashine ◽  
Awad. Elsabbe
Keyword(s):  
Modular Multilevel Converter ◽  
Power Electronic ◽  
Multilevel Converter ◽  
Electronic Components

scholarly journals Comparison between PI, PR+HC, and modified PR+HC current controller in inverter system

2019 ◽  
Vol 13 (3) ◽  
pp. 1167
Author(s):  
S. Salimin ◽  
M. Armstrong ◽  
S.A. Jumaat ◽  
R. Hamdan
Keyword(s):  
Power Electronic ◽  
Power Network ◽  
Compensation Scheme ◽  
Electronic Components ◽  
Harmonic Compensation ◽  
Proportional Integral ◽  
Current Controller ◽  
System Power ◽  
Study Development

<span>This paper presents the comparison between proportional integral (PI) current controller, proportional resonance and harmonic compensator (PR+HC) current controller and modified PR+HC current controller in the inverter system. Power electronic components like inverter and current controller uses in the system produce unwanted harmonics that affect the quality of distribution power network. In this study, development and simulation of current controller using conventional proportional integral (PI), the selective harmonic compensation scheme (PR+HC), and modified version of the latter are considered so to overcome these harmonics injection. Modification is by adding control parameter randomisation technique to the PR+HC scheme. Results compare the three controllers and proved that with modification to the selective harmonic compensation scheme, the overall current THD can be reduced</span>

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