A Reduced-Order Aggregated Model for Parallel Inverter Systems with Virtual Oscillator Control: Preprint
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- University of Washington
- University of Minnesota
This paper introduces a reduced-order aggregated model for parallel-connected inverters controlled with virtual oscillator control (VOC). The premise of VOC is to modulate inverter dynamics to emulate those of nonlinear oscillators with the goal of realizing a stable ac microgrid in the absence of communication, synchronous generation, or a stiff grid. To obtain a reduced-order model for a system of parallel-connected inverters with VOC, we first formulate a set of scaling laws that describe how the controller and filter parameters of a given inverter depend on its voltage and power rating. Subsequently, we show that N parallel inverters which adhere to this scaling law can be modeled with the same structure and hence the same computational burden of the model of a single inverter. The proposed aggregate model is experimentally validated on a system of three parallel inverters with heterogeneous power ratings.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1471288
- Report Number(s):
- NREL/CP-5D00-72265
- Resource Relation:
- Conference: Presented at the 2018 IEEE Workshop on Control and Modeling for Power Electronics (COMPEL), 25-28 June 2018, Padova, Italy
- Country of Publication:
- United States
- Language:
- English
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