A Multiobjective Adaptive Switching Control for Bidirectional DC/DC Converter

This article proposes a multiobjective adaptive switching control (MOASC) for bidirectional dc/dc converters (BDCs) in a dc microgrid (DCMG) with a photovoltaic unit (PV) and energy storage (ES). It seeks to realize rapid switching of control objectives and smooth the transient process during bus vo...

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Bibliographic Details
Published inIEEE journal of emerging and selected topics in power electronics Vol. 12; no. 2; pp. 1619 - 1628
Main Authors Li, Yong, Zhao, Bing, Wan, Jianghu, Yang, Zhixiang, Liu, Fang, Shahidehpour, Mohammad
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.04.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adaptive control
Adaptive switching control
bidirectional dc/dc converter (BDC)
Closed loops
Control systems
Distributed generation
Electric converters
Energy storage
Inductors
Mathematical analysis
multiobjective control
parallel PI
Photovoltaic cells
PI control
Power electronics
Stability analysis
Switches
Switching
Threshold voltage
Transfer functions
Transient performance
Voltage control
Voltage converters (DC to DC)
Voltage drop
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Summary:This article proposes a multiobjective adaptive switching control (MOASC) for bidirectional dc/dc converters (BDCs) in a dc microgrid (DCMG) with a photovoltaic unit (PV) and energy storage (ES). It seeks to realize rapid switching of control objectives and smooth the transient process during bus voltage drop and restoration. MOASC consists of three steps, namely, PI calculating, decision-making, and synchronous updating. Multiple single closed-loop PI controllers simplify the control structure. Starting from the gain characteristic of a BDC under two configurations, a hierarchical judgment, which is equivalent to the double closed-loop controller, is presented to obtain the duty cycle to control the main switch. To avoid integral saturation and enhance the control performance, the integral term of each loop is updated periodically. The stability of the MOASC is analyzed by mathematical analysis and building transfer functions with variable parameters. Comparative experiments are designed to verify the feasibility and superiority of the MOASC. The response speed and transient performance during objective switching is improved.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2023.3337944