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The main task of any power system is to generate high quality power to supply demand’s load. Any frequency deviation more than permissible value causes damage to components, overloading tie lines, deficits and deficiencies of relays and in worst case may lead power system to collapse. The important goal of Load Frequency Control (LFC) is to eliminate frequency deviations as quick as possible. Meanwhile reducing tie line’s power deviations and returning tie line’s power to scheduled values is important too. These two are the main tasks of Automatic Generation Control (AGC).

Today power system is experiencing structural changes. Not because of deregulating Environment and competitive policies but also because of new power generating units with new frameworks, technologies and increasing penetration levels of Renewable Energy Resources (RERs). Increasing growth of demand’s load beside of ceasing reserves of oil and global warming issues are made RERs a desirable option. By integrations of RERs into power system, aside economical point of view, load frequency control of power system will play more important role in maintaining the quality of such a system.

Hence, in other to increase petrification of RERs in frequency support, new control strategies are needed. In this thesis at first, the impacts of integration of RERs in power system are studied. And then new strategies has been proposed to participate RERs in load frequency control and to improve frequency regulation’s capability of power system in presence of RERs.


Keywords: Automatic Generation Control (AGC), Renewable Energy Resources (RERs), Photovoltaic Generation, Wind Generation, Energy Storage Systems (ESS).












Mazandaran University of Science and Technology

Faculty of Electrical Engineering


Thesis for master’s degree in power engineering



Automatic generation control of power system in presence of Renewable Energy Resources (RERs)




Behzad Moradi



Dr. Abdolreza Sheikholeslami



Roya Ahmadi




[1] Maximum Power Point Tracking

[2] Robustness

[3] Torque Set-point

[4] Superconductive Magnetic Energy Storage

[5] Inertia

[6] Modal

[7] Anti-Windup

[8] State of Charge

[9] State of Charge



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