Abstract
This paper introduces a fully decentralized control strategy that allows for individualized active and reactive power control of H-bridge inverters connected in series. After formulating a model of the system power flows, we outline a communications-free approach where each inverter can act on independent commands. Inverter-level feedback is accomplished locally via a measurement of current flowing through the stack. A key feature is the lack of any centralized control routines or phase-locked loop. In this framework, the reactive power control loops achieve voltage synchronization among the converters and the grid, and the active power control loops modulate the terminal voltage amplitudes that influence power delivery. Furthermore, pole placement via state feedback is used to ensure stability of voltage synchronization while also enabling tracking of bidirectional power commands. Simulations are presented to validate the proposed approach.
Original language | American English |
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Number of pages | 9 |
State | Published - 2020 |
Event | 21st IEEE Workshop on Control and Modeling for Power Electronics (IEEE COMPEL 2020) - Duration: 9 Nov 2020 → 12 Nov 2020 |
Conference
Conference | 21st IEEE Workshop on Control and Modeling for Power Electronics (IEEE COMPEL 2020) |
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Period | 9/11/20 → 12/11/20 |
Bibliographical note
See NREL/CP-5D00-78885 for paper as published in proceedingsNREL Publication Number
- NREL/CP-5D00-78056
Keywords
- communication-free modular converter control
- decentralized control
- distributed energy resources
- medium-voltage grid integration
- pv inverters