Management and Control of Microgrid Connected to a Three-Phase Network with the Approach of Activating Current Limitation Under Unbalanced Errors Using the Fuzzy Intelligent Method with the Presence of Battery, wind, Photovoltaic and Diesel Sources

Subject Areas : Renewable energy

Mostafa  Abbasi ¹ (Department of Electrical Engineering- Marvdasht Branch, Islamic Azad University, Marvdasht, Iran)
Mehdi  Nafar ² (Department of Electrical Engineering- Marvdasht Branch, Islamic Azad University, Marvdasht, Iran)
Mohsen  Simab ³ (Department of Electrical Engineering- Marvdasht Branch, Islamic Azad University, Marvdasht, Iran)

Received: 2020-12-03 Accepted : 2021-05-26 Published : 2022-05-22

Keywords: Microgrid, Energy management, Voltage Fault, Supervisory Control,

Abstract :

Today, the use of distributed generation resources connected to the network has remarkable growth therefore network-connected to the converters must be able to provide services beyond the injection of power into network, including maintaining network stability. In this paper the control and management of energy for battery wind, photovoltaic and diesel connected to a three-phase network by activating the current limitation under unbalanced fault has been introduced. In this method injected currents are limited to a certain amount along the faults Also, the operation mode without tracking the maximum power point for the converter is included. This state is activated during severe faults, when the converter cannot control Maximum power of the system. Therefore, in a microgrid with, the operation of a fuzzy logic-based controller the transformation operation of DC to DC converter control is performed sparsely by two-way battery and distributed generation resources management. Also proportional resonance controller is used due to its proper performance. In fact, with the use of reference current generation, sinusoidal current with a total harmonic distortion (THD) value of less than 5% is injected. The results show that the control strategy along with energy management with multiple energy generation resources is able to limit and maintain DC link voltage within an acceptable range in addition to The existence of an asymmetric fault. Therefore, the fault crossing operation has been performed correctly without the operation of the protection relays and secondly in comparison with microgridsolely with the presence of one photovoltaic production source the process of injecting active and reactive power in the upstream network is more appropriate.

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