NDLI: Predictive control method for wind power regulation via a double-screw expander-generator and supercapacitor

Content Provider	IET Digital Library
Author	Zhu, Sanli Lu, Jiping Liu, Jialin
Abstract	A modified hybrid energy storage system (HESS) consisting of a double-screw expander-generator (DSEG) and a supercapacitor is proposed here to accommodate wind power fluctuations. The dynamic matrix control (DMC) algorithm is applied to improve the operating performance of the HESS. The reference track of the exchanging active power of the supercapacitor is pre-planned based on wind turbine output, load demand, and the predictive DSEG output. Meanwhile, a linearisation and state of charge (SOC) management strategy for the supercapacitor is proposed to avoid excessive charging-discharging. During the predictive control process, the DSEG input is continually adjusted by means of rolling optimisation combined with feedback correction until the output of the HESS approximates its expectation. Case studies show that the supercapacitor efficiently eliminates the power hysteresis of the DSEG and the DSEG eliminates the intrinsic error caused by the linearisation of the supercapacitor output in turn, indicating that the control effect of the HESS is improved.
Starting Page	2731
Ending Page	2737
Page Count	7
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 13, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.6350
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-04-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Power Algebra Control Effect Control of Electric Power System Double-screw Expander-generator DSEG Input Dynamic Matrix Control Algorithm Energy Storage Excessive Charging-discharging Feedback Correction HESS Hybrid Energy Storage System Load Regulation Matrix Algebra Optimal Control Optimisation Optimisation Technique Other Power Apparatus And Electric Machine Power Generation Control Power Hysteresis Predictive Control Predictive Control Method Predictive Control Process Predictive DSEG Output Supercapacitor Supercapacitor Output Wind Power Wind Power Fluctuations Wind Power Plant Wind Power Regulation Wind Turbine Wind Turbine Output
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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