Inverter-based microgrid dynamic stability analysis considering inventory of dynamic and static load models

Subject Areas : Renewable energy

Saeid Zamanian ¹ , Sajad Sadi ² , Reza Ghaffarpour ³ , Aram Mahdavian ⁴

1 - Department of Engineering and defense, Imam Hossein University, Tehran, Iran
2 - Department of Biosystems Engineering, Tarbiat modares university, Tehran, Iran
3 - Department of Engineering and defense, Imam Hossein University, Tehran, Iran
4 - Department of Engineering, Arak University, Arak, Iran

Received: 2020-08-06 Accepted : 2020-10-31 Published : 2021-02-19

Keywords: Microgrid, Dynamic stability, dynamic load model, exponential recovery load model, polynomial load model,

Abstract :

The proper and sustainable performance of any electrical system is mainly related to the designers' insight into the nature of that system. Therefore, the need to provide an accurate model based on the actual behavior of the system has considerable importance. In the case of inverter-based microgrid, due to the lack of sufficient synchronizing torque, the design process must be carried out with the utmost precision. In this paper, the stability of the inverter-based microgrid will be studied. First by presenting the equations of the microgrid components its state-space model is obtained and in the presence of the static load model the stability of the system will be investigated. Then, by placing the inventory of dynamic exponential recovery and static polynomial load models, the results of the static model-based design are investigated. In this study, the measure of system stability will be eigenvalue plots and system performance. In order to achieve system stability and performance improvement, the state variables participation factors extracted and the effective parameters will be studied

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