Improved Control Strategy for Three-Phase Microgrid Management with Electric Vehicles Using Multi Objective Optimization Algorithm

Abstract

The usage of electric vehicles (EV) have been spreading worldwide, not only as an alternative to achieve a low-carbon future but also to provide ancillary services to improve the power system reliability. A common problem encountered in the existing alternating current (AC) grids is low power factor, which cause several power quality problems and has worsened with the growing application of distributed generation (DG). Therefore, considering the spread of EVs usage for ancillary services and the low power factor issue in current electrical grids, this paper proposes an improved control strategy for power factor correction of a three-phase microgrid management composed of a photovoltaic (PV) array, dynamic loads, and an EV parking lot. This control strategy aims to support power factor issues using the EV charging stations, allowing the full PV generation. Different operation modes are proposed to fulfill the microgrid and the EV users’ requirements, characterizing a Multi Objective Optimization (MOO) approach. In order to achieve these optimization requests, a dynamic programming method is used to charge the vehicle while adjusting the microgrid power factor. The proposed control algorithm is verified in different scenarios, and its results indicate a suitable performance for the microgrid even during conditions of overload and high peak power surplus in generation unit. The microgrid power factor remains above the desired reference during the entire analyzed period, in which the error is approximately 4.5 less than the system without vehicles, as well as obtains an energy price reduction.

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“…Distinct indicators at different system states were computed, as listed in Table 5, for evaluation of the effectiveness of the different FR control strategies. The random load formulated as in (24) and simulated as shown in Figure 14 was assumed to simulate normal distribution.…”

“…FR cost reduction has also been found to improve FR revenue through factors such as battery degradation reduction [22,23]. The satisfaction of EV owners should also be ensured through the maintenance of state of charge (SOC) at maximum possible limits [24,25].…”

Electric Vehicle Battery Storage Concentric Intelligent Home Energy Management System Using Real Life Data Sets

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Techno-Economic Assessment and Operational Planning of Wind-Battery Distributed Renewable Generation System

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“…The capability of integrating heterogeneous generation systems in MG increases the overall system reliability with efficient operation [13]. Therefore, distributed generators such as diesel generators (DG), storage systems, dump loads, and electric vehicles can be optimally used individually during grid transition and expansion in the future power grid [14,15]. These features predominantly differentiate MGs from centralized systems (Figure 2).…”