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Content Provider | IET Digital Library |
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Author | Nakka, Pruthvi Chaithanya Mishra, Mahesh Kumar |
Abstract | In this study, a proportionate power sharing among the parallel inverters operating in an islanded microgrid is achieved using droop and virtual inductance control. The same droop coefficients are used to achieve the frequency regulation as well. The frequency changes which are inevitable in droop control are measured and used to emulate the behaviour of damping and inertia to the DC link voltage using hybrid energy storage system consisting of battery and supercapacitor units. The proposed DC link voltage regulator restores the DC link voltage quickly by providing power corresponding to the rate of change of frequency and frequency deviation. This reduces the impact of voltage variations on the DC-load and keeps modulation index within the linear range for voltage source inverter. The design aspects of DC link voltage regulator, damping and inertia constants, selection of battery and supercapacitor units based on rating of the DC link voltage are discussed. The proposed decentralised droop control and DC link voltage restoration methods are validated through detailed simulation and experimental studies. |
Starting Page | 1044 |
Ending Page | 1052 |
Page Count | 9 |
ISSN | 17521416 |
Volume Number | 14 |
e-ISSN | 17521424 |
Issue Number | Issue 6, Apr (2020) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/14/6 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0691 |
Journal | IET Renewable Power Generation |
Publisher Date | 2020-01-13 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Battery Control of Electric Power System Damping DC Link Voltage Regulator DC Link Voltage Restoration Method DC-load Decentralised Droop Control Distributed Power Generation Distribution Network Droop Characteristic Droop Coefficient Energy Storage Frequency Changes Frequency Control Frequency Deviation Frequency Regulation Hybrid Energy Storage System Hybrid Microgrid Inertia Constants Inertia Emulation Invertors Power Distribution Control Power Distribution Fault Power Generation Control Power Grid Proportionate Power Sharing Supercapacitor Supercapacitor Units Virtual Inductance Control Voltage Control Voltage Regulators Voltage Source Inverter Voltage Variations |
Content Type | Text |
Resource Type | Article |
Subject | Renewable Energy, Sustainability and the Environment |
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