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Energies 2013, 6(10), 5200-5218; doi:10.3390/en6105200
Article

Optimal Switching Table-Based Sliding Mode Control of an Energy Recovery Li-Ion Power Accumulator Battery Pack Testing System

1
, 2
 and 2,*
1 School of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China 2 Departments of Electronics & Information Engineering, Chonbuk National University, Jeonju 567, Korea
* Author to whom correspondence should be addressed.
Received: 14 August 2013 / Revised: 29 September 2013 / Accepted: 10 October 2013 / Published: 14 October 2013
(This article belongs to the Special Issue Li-ion Batteries and Energy Storage Devices)
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Abstract

The main objective of the present work is to apply a sliding mode controller (SMC) to medium voltage and high power output energy recovery Li-ion power accumulator battery pack testing systems (ERLPABTSs), which are composed of a three-level neutral-point-clamped (NPC) three-phase voltage source inverter (VSI) and a two-level buck-boost converter without an isolating transformer. An inner current decoupled control scheme for the aforementioned system is proposed and two sliding mode planes for active and reactive current control are designed based on the control scheme. An optimized switching table for current convergence is used according to the error sign of the equivalent input voltage and feedback voltage. The proposed ERLPABTS could be used to integrate discharging energy into the power grid when performing high accuracy current testing. The active and reactive power references for the grid-connected inverter are determined based on the discharging energy from the DC-DC converter. Simulations and experiments on a laboratory hardware platform using a 175 kW insulated gate bipolar transistor (IGBT)-based ERLPABTS have been implemented and verified, and the performance is found satisfactory and superior to conventional ERLPABPTS.
Keywords: energy recovery Li-ion power accumulator battery pack testing system (ERPALBPTS); neutral point clamped-voltage source inverter (NPC-VSI); sliding mode control (SMC) energy recovery Li-ion power accumulator battery pack testing system (ERPALBPTS); neutral point clamped-voltage source inverter (NPC-VSI); sliding mode control (SMC)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Long, B.; Ryu, J.H.; Chong, K.T. Optimal Switching Table-Based Sliding Mode Control of an Energy Recovery Li-Ion Power Accumulator Battery Pack Testing System. Energies 2013, 6, 5200-5218.

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