A Study on the V2G Technology Incorporation in a DC Nanogrid and on the Provision of Voltage Regulation to the Power Grid

Abstract

Currently, environmental and climate change issues raise a lot of concerns related to conventional vehicles and renewable energy generation methods. Thus, more and more researchers around the world focus on the development and deployment of Renewable Energy Sources (RES). Additionally, due to the technological advancements in power electronics and electrical batteries, Electrical Vehicles (EVs) are becoming more and more popular. In addition, according to the Vehicle-to-Grid (V2G) operation, the EV batteries can provide electrical energy to the power grid. In this way, many ancillary services can be provided. A Direct Current (DC) nanogrid can be composed by combining the aforementioned technologies. Nanogrids present high efficiency and provide a simple interaction with renewable energy sources and energy storage devices. Firstly, the present study describes the design considerations of a DC nanogrid as well as the control strategies that have to be applied in order to make the V2G operation feasible. Furthermore, the provision of voltage regulation toward the power grid is investigated though the bidirectional transfer of active and reactive power between the DC nanogrid and the power grid. Afterwards, the voltage regulation techniques are applied in an Alternating Current (AC) radial distribution grid are investigated. The proposed system is simulated in Matlab/Simulink software and though the simulation scenarios the impact of the voltage regulation provided by the DC nanogrid is investigated.

Resilience-Oriented Scheduling of Shared Autonomous Electric Vehicles: A Cooperation Framework for Electrical Distribution Networks and Transportation Sector

“…Like conventional EVs, an important potential of SAEVs is the ability to deliver the electrical energy stored in their batteries to the power grid, called V2G capability. Tis feature of SAEVs can provide the power system with various ancillary services such as peak shaving [40][41][42], demand response [43,44], mitigating renewables generation variability and intermittency [45,46], voltage, and frequency regulation [47][48][49][50][51][52]. In addition, SAVEs can help distribution networks in emergency conditions to make the grid more resilient.…”

Price-Response Matrices Design Methodology for Electrical Energy Management Systems Based on DC Bus Signalling

“…AC links are commonly used in microgrids, where the system is distributed in some places, and higher power levels are required [9,10]. However, when the system is concentrated in a single area for individual prosumers, the dc coupling reduces the power processing losses [8,[11][12][13]. It is understandable since, in hybrid power generation systems with battery energy storage (BESS) and photovoltaic (PV) generation, some power processing stages can be suppressed with dc coupling [8].…”