NDLI: Power control strategy for photovoltaic system based on the Newton quadratic interpolation

Content Provider	IET Digital Library
Author	Liu, Yun Xin, Huanhai Wang, Zhen Yang, Taicheng
Abstract	To maximise the economic benefit, photovoltaic (PV) systems in general operate in the so-called maximum power point tracking (MPPT) mode. However, in certain occasions (e.g. in a microgrid or in a weak system), it is beneficial for a PV system not to always operate in the MPPT mode, but occasionally in the power dispatch mode, because of the top priority of maintaining system stability. To this end, a Newton quadratic interpolation-based power control strategy for PV system is proposed to iteratively obtain the required terminal voltage of PV system by approximating the power–voltage characteristic curve with a quadratic curve. With this control strategy, PV systems can operate in the power dispatch mode to flexibly adjust the active power output in a wide range, or adaptively switch to the MPPT mode if necessary. Details on the convergence rate and the way to achieve the fault ride-through capability are also discussed. Simulation is performed based on a detailed PV dynamical model, illustrating that the proposed method has fast convergence rate and robust performance compared with a revised perturb and observe method which can attain the same function.
Starting Page	611
Ending Page	620
Page Count	10
ISSN	17521416
Volume Number	8
e-ISSN	17521424
Issue Number	Issue 6, Aug (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/8/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2013.0067
Journal	IET Renewable Power Generation
Publisher Date	2014-02-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Control of Electric Power System Convergence of Numerical Method Convergence Rate Distributed Power Generation Fault Diagnosis Fault Ride-through Capability Interpolation Interpolation And Function Approximation Maximum Power Point Trackers Maximum Power Point Tracking Mode Microgrid System MPPT Mode Newton Method Newton Quadratic Interpolation Numerical Analysis Observe Method Perturbation Technique Photovoltaic Power System Photovoltaic System Power And Energy Control Power Control Power Control Strategy Power Dispatch Mode Power Generation Control Power Generation Dispatch Power System Economics Power System Managemen Power System Operation Power-voltage Characteristic Curve PV Dynamical Model Quadratic Curve Revised Perturb Method Solar Power Stations Stability Stability in Control Theory Terminal Voltage
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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