Model Predictive Control-Based Dual-Mode Operation of an Energy-Stored Quasi-Z-Source Photovoltaic Power System

Yushan Liu, Xuyang Liu, Xiao Li, Haiwen Yuan, Yaosuo Xue

Research output: Contribution to journalArticlepeer-review

56 Scopus citations

Abstract

The energy-stored quasi-Z-source inverter (ES-qZSI) has attracted much attention for photovoltaic (PV) power generations, due to its capability to stabilize the PV power fluctuations with simple structure and other advantages of Z-source inverter. The improved dual-mode (DM) ES-qZSI is able to support all-weather operation even at night or cloudy days when PV power is extremely low. However, the traditional proportional-integral (PI) based control suffers from complicated controller design and poor dynamic response during mode transition, due to two sets of PI control required for the daytime and night operation modes. In order to overcome that, in this article, we propose a model predictive control strategy for the DM-ES-qZSI PV power system. The system predictive models in both day and night operating modes are derived. The control strategy is disclosed to ensure high performance of the system, through calling the predictive models and defined cost functions of the two modes within a single control loop. Simulation and experiment are carried out to verify the effectiveness of the proposed control strategy.

Original languageEnglish
Pages (from-to)9169-9180
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Volume70
Issue number9
DOIs
StatePublished - Sep 1 2023

Funding

This work was supported in part by the National Natural Science Foundation of China under Grant 52107175, in part by Beijing Nova Program under Grant Z211100002121080, and in part by the National Key Laboratory of Operation and Control of New Power Systems of Tsinghua University, China, under Grant SKLD22KM18

FundersFunder number
National Key Laboratory of Operation and Control of New Power Systems of Tsinghua UniversitySKLD22KM18
National Natural Science Foundation of China52107175
Beijing Nova ProgramZ211100002121080

    Keywords

    • Energy storage
    • model predictive control
    • photovoltaic power systems
    • quasi-Z-source inverter

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