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RISS 인기검색어
- 검색키워드
- 저자 : Nafar Mehdi (검색결과 2 건)
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Health Effects Study and Safe Distance Determination Near an Electrical Distribution Network
Mehdi Nafar 한국전자파학회JEES 2019 Journal of Electromagnetic Engineering and Science Vol.19 No.3
Living organisms are affected by environmental pollution, one main source of which is the electric and magnetic fields (EMFs) of electrical distribution lines that produce high-voltage currents. Nowadays, electrical power transmission lines and distribution systems are becoming increasingly prevalent, with power distribution lines passing through cities and being located very close to buildings. For this reason, there has been significant public concern, which has escalated because of reports about the adverse health effects of the EMFs of power distribution systems. In this paper, the environmental pollution produced by several different configurations of electrical distribution systems in Iran is studied. The paper presents new software to calculate EMFs around electric power lines. Using this software and based on maximum allowable EMFs, a safe margin around selected power lines has been determined. According to the study results, it seems that in Iran this safe distance is not met. Therefore, the standards relating to power distribution lines should be reviewed.
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A Novel Sliding Mode Based UPQC Controller for Power Quality Improvement in Micro-Grids
Heidari Mohammad Amin,Nafar Mehdi,Niknam Taher 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1
This paper presents a novel State Observer Based Sliding Mode controller for UPQC inverters to enhance the power quality in microgrids. In the proposed control scheme, Enhanced extended state observer was applied on a standard sliding mode controller to boost its disturbance rejection capability. The controller was designed to be robust against parameteric and external uncertainties. Further, aff ordable UPQC-grid integration scheme suggested where the photovoltaeek system could be connected to the network via UPQC inverters. Using the suggested confi guration the active and reactive power injection capability was added to UPQC along with its commonly known advantages. Extensive MATLAB Simulink-based theoretical and experimental studies were conducted in diff erent scenarios to verify the effi ciency of the proposed method in improving the power quality indices. Using UPQC with the proposed control scheme shows the better performance than the current traditional UPQC controllers in voltage sag reduction and Harmonics minimization. The main feature of the proposed controller included its accuracy and fast tracking response
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