Characterization of the Operation of a BESS with a Photovoltaic System as a Regular Source for the Auxiliary Systems of a High-Voltage Substation in Brazil

Abstract

Substation (SS) auxiliary systems (SAux) are facilities responsible for hosting the alternating (AC) and direct current (DC) busbar to serve the equipment and systems that perform the substation’s protection, control, and supervision. External and internal power supplies typically ensure the continuity of such a facility. The electricity support will be restricted to diesel emergency generators (DG) if the external power supply is unavailable due to a contingency. The DG present a slower response time and are susceptible to starting failures. Microgrids with Battery Energy Storage Systems (BESS) paired with photovoltaic systems (PV) are presented as an innovative and reliable solution for powering the SAux. In this article, tests were carried out on the microgrid of the Edson Mororó Moura Institute of Technology (ITEMM) in Brazil to support the use of microgrids BESS/PV in the SAux of a transmission SS of the São Francisco Hydroelectric Company (Chesf). Without an external power supply, BESS commands the action of islanded operation, maintaining both voltage and frequency requirements of the microgrid without load shedding. It was possible to observe all operations of the microgrid. The experimental results showed that the solution proposed in the paper implements a dependable self-dispatchable autonomous power supply.

Review of Degradation Mechanism and Health Estimation Method of VRLA Battery Used for Standby Power Supply in Power System

“…where I is the discharging current, and t 1 and t 2 are the starting and ending times of the discharge process, respectively. The initial maximum capacity of a battery (C initial ) is usually provided by the manufacturer (referred to as nominal capacity); then, the SOH is determined using Equation (5).…”

“…In June 2016, a fire broke out due to equipment failure, and the lead-acid battery failed to supply power in time due to failure, resulting in an accident of voltage loss in a 330 kV substation in the western suburb of Xi'an, China [4]. Similar serious accidents due to VRLA failure have also occurred in substations in other areas [5,6].…”

Review on microgrids design and monitoring approaches for sustainable green energy networks

“…Other methods to reduce MG lag time include Control strategies for synchronous machines that utilized virtual inertia were adopted in integrators 66 . Use of batteries for energy storage to aid in the frequency management of MGs powered by photovoltaic cells 67 . An inverter’s energy phase can be regulated by simulating non-linear harmonics with the system frequency as that of the natural frequency 68 .…”

Studying Abuse Testing on Lithium-Ion Battery Packaging for Energy Storage Systems

“…This increase accelerated the demand for energy storage systems (ESS) for vehicles and trucks [3,4]. Lithium-ion batteries (LIBs) present several advantages compared to other proposals (such as lead acid batteries) [5][6][7]. Therefore, this technology has been applied with different chemicals.…”