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Direct Power Control of Back to Back Modular Multilevel Converter with Advanced Grid Support Functions for Grid Forming Application

Conference ·
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Possibility of using back-to-back modular multilevel converter system with a direct power control architecture has been investigated in this paper. The rectifier side is controlled to be in grid following mode whereas the inverter side is controlled in grid forming mode. Both the sides’ local controllers use Lyapunov energy function based architecture to accomplish the objective of active and reactive power control as well as maintaining a fixed user defined voltage over the dc bus on the rectifier side. Therefore, the proposed direct power control architecture has embedded dc bus control architecture to maintain fixed user defined value of the capacitors. Similar architecture is implemented on the inverter side to accomplish either voltage control during grid forming or power control during grid following. Advanced grid support functionalities based on IEEE-1547-2018 is implemented and utilized to generate the reference values for either the rectifier or the inverter sides. The overall system is modeled based on MATLAB/Simulink and PLECS domain and various important case studies to verify the efficacy of the overall system has been 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:
2368585
Report Number(s):
NREL/CP-5D00-90030; MainId:91808; UUID:bee8504f-de3f-4614-bac3-da5fd5cc6151; MainAdminId:72698
Country of Publication:
United States
Language:
English

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Related Subjects

Lyapunov energy function
MATERIALS SCIENCE
POWER TRANSMISSION AND DISTRIBUTION
direct power control (DPC)
modular multilevel converter