NDLI: Enhancing inertia of solar photovoltaic-based microgrid through notch filter-based PLL in SRF control

Content Provider	IET Digital Library
Author	Panda, Rakesh Kumar Mohapatra, Abheejeet Srivastava, Suresh C.
Abstract	Synchronous reference frame (SRF) control strategy for solar photovoltaic (SPV) sources is widely used to deliver maximum power to the grid. However, poor inertia support just after a disturbance and improper phase angle tracking in presence of the harmonics and system unbalance are noticed when the conventional phase-locked loop (PLL) based SRF control structure is used. In this study, an inertia enhancement method for inverter interfaced SPV sources is proposed, which adjusts only the PLL parameters with a notch filter (NF) in the SRF controller. NF in PLL is used due to its disturbance rejection potential and accurate phase angle tracking, even during system unbalance. The dynamic equation of pseudo induced voltage (PIV) vector with respect to the point of common coupling is derived. The kinematic equation of the PIV angle vector correlates inertia contribution and inverter terminal voltage. The impact of the change in PLL parameters on inertia enhancement is analyzed by validating the proposed technique on a test system in the real-time digital simulator. The frequency response by the proposed method has been compared with two state-of-art methods to prove the superiority of the proposed approach in enhancing the inertia of the SPV source in a microgrid.
Starting Page	379
Ending Page	388
Page Count	10
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 3, Feb (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.7058
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-11-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accurate Phase Angle Tracking Control of Electric Power System Control Structure Conventional Phase-locked Loop Conventional PLL Distributed Power Generation Disturbance Rejection Enhancing Inertia Frequency Response Harmonics Improper Phase Angle Tracking Inertia Contribution Inertia Enhancement Method Inverter Invertors Microgrid System Notch Filter Notch Filter-based PLL Phase Locked Loop Photovoltaic Power System PI Control PIV Angle Vector PLL Parameter Poor Inertia Support Power Generation Control Power Supply Quality Pseudoinduced Voltage Vector Solar Photovoltaic Source Solar Power Stations SPV Source SRF Control SRF Controller Synchronous Generator Synchronous Machine Synchronous Reference Frame Control Strategy System Unbalance Virtual Synchronous Generator-based Method
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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