NDLI: Model predictive flexible power control for grid-connected inverter under unbalanced network

Content Provider	IET Digital Library
Author	Hu, Bihua Chen, Zhiyong Zhang, Zhi Liu, Siyan Deng, Wenlang
Abstract	Model predictive power control (MPPC) is considered as a promising algorithm utilised in grid-connected inverter due to its fast dynamic response, simple control structure and multi-objective optimisation. However, under unbalanced network, the grid current with excessive distortion troubles the application of MPPC. Based on the conventional MPPC, this study proposes a model predictive flexible power control (MPFPC) to reduce the current total harmonic distortion and achieve three flexible targets, including the cancellation of the active- and reactive-power oscillation and the negative-sequence grid current. In this algorithm, the power references are divided into two parts, which are used as reference values for the instantaneous active power control (IAPC) and the instantaneous reactive power control (IRPC), respectively. The three flexible targets are achieved by regulating the ratio of the two parts of power reference. Meanwhile, the grid current of MPFPC is the sum of IAPC and IRPC; therefore, the grid current distortion can be suppressed effectively. Simulation and experimental platform constructed by a three-level inverter are established to validate the effectiveness of MPFPC, and the results exhibit that the MPFPC meets the above expectations.
Starting Page	3580
Ending Page	3589
Page Count	10
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 16, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2020.0242
Journal	IET Power Electronics
Publisher Date	2020-08-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Reactive Power Oscillation Control of Electric Power System Current Control Current Total Harmonic Distortion Dynamic Response Electric Current Control Flexible Targets Grid Current Distortion Grid-connected Inverter Harmonic Distortion Instantaneous Active Power Control Instantaneous Reactive Power Control Invertors Model Predictive Flexible Power Control Model Predictive Power Control MPFPC MPPC Negative-sequence Grid Optimal Control Optimisation Optimisation Technique Power And Energy Control Power Grid Power Reference Power System Control Predictive Control Reactive Power Control Simple Control Structure Unbalanced Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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