skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Circulating Current Reduction of Back-to-Back MMC with Advanced Grid-Support Functionalities for Medium-Voltage Applications

Conference ·
; ORCiD logo; ORCiD logo

A Lyapunov energy function based circulating current reduction scheme for a back to back modular multilevel converter based system for a microgrid application has been proposed in this digest. In order to ensure no circulating or zero sequence currents within the modules, the dynamics from one leg of the converter to the other are evaluated. A Lyapunov energy function is then developed and utilizing the circulating current dynamics of the converter the overall control law is implemented. In this digest a decentralized hierarchical control architecture has been implemented for the main current control; where the outer loop or the central controller implements the higher level grid interconnection functions as per IEEE 1547-2018 standards and the inner loop based on synchronous reference frame implements the current control architecture. The inner loops' outputs are the commanded converter voltages either on either side which are augmented by the Lyapunov energy function based circulating current suppression architecture. To evaluate the efficacy of the overall system, the overall system is modeled around a 300kVA back to back SiC multilevel modular converter used as a direct-connected medium voltage (MV) grid intertie based on MATLAB/Simulink domain. Several important case studies are presented in this paper to prove the effectiveness of the proposed architecture. case study results are presented.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing and Materials Technologies Office (AMMTO)
DOE Contract Number:
AC36-08GO28308
OSTI ID:
1992025
Report Number(s):
NREL/CP-5D00-84606; MainId:85379; UUID:e5f0d478-eb88-4c2f-bbe9-9f95bdcae4aa; MainAdminID:69984
Resource Relation:
Conference: Presented at the 2023 IEEE Applied Power Electronics Conference and Exposition (APEC), 19-23 March 2023, Orlando, Florida
Country of Publication:
United States
Language:
English

References (20)

Negative Virtual Capacitance to Eliminate Resonance Oscillations in a Three-Phase Inverter with LCL Filter conference October 2020
An Enhanced Lyapunov-Function Based Control Scheme for Three-Phase Grid-Tied VSI With LCL Filter journal April 2019
Control of Soft Switching Solid State Transformer based on Lyapunov Energy Function for Three-phase AC-AC Power Conversion conference October 2021
Negative Virtual Inductance based Active Damping and Direct Power Control of a Soft Switching Solid State Transformer for $PV$ Application conference March 2022
Control and Grid Support Function Evaluation for a Three-Phase Back-to-Back Modular Multilevel Converter System conference October 2022
Grid Voltage Estimation and Feedback Linearization based Control of a Three phase Grid Connected Inverter under Unbalanced Grid Conditions with LCL Filter conference September 2019
Improved passivity‐based control method and its robustness analysis for single‐phase uninterruptible power supply inverters journal August 2015
A New Control Strategy of a VSC–HVDC System for High-Quality Supply of Industrial Plants journal October 2007
Dynamic Performance of a Modular Multilevel Back-to-Back HVDC System journal October 2010
Overview of Control and Grid Synchronization for Distributed Power Generation Systems journal October 2006
Evaluation of Current Controllers for Distributed Power Generation Systems journal March 2009
A Review of Single-Phase Grid-Connected Inverters for Photovoltaic Modules journal September 2005
Efficiency Optimization of a DSP-Based Standalone PV System Using Fuzzy Logic and Dual-MPPT Control journal August 2012
Reduced Switching-Frequency Modulation and Circulating Current Suppression for Modular Multilevel Converters journal July 2011
Circulating Current Control in MMC Under the Unbalanced Voltage journal July 2013
Passivity-Based Control of Single-Phase PWM Current-Source Inverters conference November 2007
Control and performance analysis methodology for scale-up of MMC submodules for back-to-back HVDC applications conference March 2017
Classification, Terminology, and Application of the Modular Multilevel Cascade Converter (MMCC) journal November 2011
Power hardware-in-the-loop evaluation of PV inverter grid support on Hawaiian electric feeders conference April 2017
A power hardware-in-the-loop framework for advanced grid-interactive inverter testing conference February 2015

Similar Records

Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
circulating current
grid-support functions
Lyapunov energy function
modular multilevel converter