Design and real time controller implementation for a battery-ultracapacitor hybrid energy storage system

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Design and Real-Time Controller Implementation for a Battery-Ultra-capacitor Hybrid Energy Storage System In this work, two real-time energy management strategies have been investigated for optimal current split between batteries and ultracapacitors (UCs) in electric vehicle (EV) applications. In the first strategy, an optimization problem is formulated and solved using Karush-Kuhn-Tucker (KKT) conditions to obtain the real-time operation points of current split for the hybrid energy storage system (HESS). In the second strategy, a neural network based strategy is implemented as an intelligent controller for the proposed system. To evaluate the performance of these two real-time strategies, a performance metric based on the battery state-of-health (SoH) is developed to reveal the relative impact of instantaneous battery currents on the battery degradation. A 38V-385Wh battery and a 32V-4.12Wh UC HESS hardware prototype has been developed and a real-time experimental platform has been built for energy management controller validation, using xPC Target and National Instrument data acquisition system (DAQ). Both the simulation and real-time experiment results have successfully validated the real-time implementation feasibility and effectiveness of the two real-time controller designs. It is shown that under a high speed, high acceleration, aggressive drive cycle US06, the two real-time energy management strategies can greatly reduce the battery peak current and consequently decreases the battery SoH reduction by 31% and 38% in comparison to a battery-only energy storage system. Web : http://www.lemenizinfotech.com web : http://www.lemenizinfotech.com/tag/ieee-projects-in-pondicherry/ Web : http://ieeemaster.com Web : http://www.lemenizinfotech.com/power-system-ieee-projects-2016-2017/ Web : http://ieeemaster.com/power-system-ieee-projects-2016-2017/ Address: 36, 100 Feet Road(Near Indira Gandhi Statue), Natesan Nagar, Pondicherry-605 005 Contact numbers: +91 95663 55386, 99625 88976 (0413) 420 5444 Mail : projects@lemenizinfotech.com Mobile : 9566355386 / 9962588976

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Design and Real-Time Controller
Implementation for a Battery-Ultracapacitor
Hybrid Energy Storage System
Introduction:
Electric vehicles (EVs) face significant energy storage related
challenges, including the range anxiety, high cost, and battery
degradation. Batteries, as the energy storage components in majority of
current and upcoming EVs, deliver energy to the electric machine during
propulsion and recover energy during regenerative braking. For urban
drive cycles with frequent stop-and-go, the frequent high power
exchange between the electric machine and the ESS results in
accelerated battery aging. The battery aging decreases the battery
capability of storing energy and providing power over the battery
lifetime. One potential solution to this problem is to integrate high-
energy (HE) density batteries with high-power (HP) density
ultracapacitors (UCs) as hybrid energy storage systems (HESS). UCs
has complementary features to batteries with fast charge-discharge,
excellent power performance over broad temperature range, long
lifetime and high reliability. UCs can protect batteries against fast
charging/discharging, reduce high peak power and relieve the battery
thermal burden; therefore, prolong the battery lifetime.

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