A Novel Method of Voltage and Frequency Control in Isolated Micro grids using Improved Droop Controller
Publish place: 28th International Power System Conference
Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
PSC28_132
تاریخ نمایه سازی: 25 اردیبهشت 1393
Abstract:
This paper presents a new method for optimal frequency and voltage control in micro grids (MG) considering the mutual effect of line parameters on power transfer. An MG consists of a number of distributed generation (DG) sources that are linked to the main grid with voltage source inverters. In MGs each DG has its special droop characteristics. When a load consumption change occurs in the MG, an imbalance between generation and consumption rises, thus a change occurs in the voltage and frequency of DGs according to their droop characteristics. In order to minimize oscillations of voltage and frequency, we have used optimal droop controller which is based on considering the mutual effects of transfer parameters on active and reactive powers. Since line parameters heavily affect the droop characteristics, these parameters are obtained optimally by the frog algorithm such that oscillations in voltage and frequency are minimized. In order to enhance the controlling scheme, effects of line resistance on reactive power changes and effects of line reactance on active power changes are also considered. The obtained results show satisfactory voltage and frequency control in various load level. In this paper, MGs are studied and simulated in an isolated state
Keywords:
micro grids , frog optimization algorithm , droop control , voltage and frequency control , isolated network
Authors
Mohammad Mardaneh
Department of Electrical Engineering Faculty of Engineering, Shiraz university of Shiraz Shiraz, Iran
Mahdi Taghizadeh
Department of Electrical Engineering Faculty of Engineering, Shiraz university of Shiraz Shiraz, Iran
Mokhtar Sha sadeghi
Department of Electrical EngineeringFaculty of Engineering, Shiraz university of ShirazShiraz, Iran