Grid-friendly Services of Smart Inverter and Battery Energy Storage System for Solar PV Integration in Advanced Distribution Networks

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Shuvra, M. A. (2018). Grid-friendly Services of Smart Inverter and Battery Energy Storage System for Solar PV Integration in Advanced Distribution Networks. Unc Charlotte Electronic Theses And Dissertations.
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Abstract

Solar Photovoltaic (PV) power plants are changing the landscape of the electric power industry. The smart inverter is well-known for its versatility to integrate PV resources into the utility in a ‘grid-friendly’ manner. BESS deployment on the power grid facilitates this highly variable energy penetration by reducing the intermittency of PV resources. However, finding new applications of solar-storage combination would be needed to make it a cost-effective and reliable solution. In this context, voltage and frequency regulation, power quality and bulk-grid support applications are addressed in this work. At first, a droop-based BESS control is developed for grid-connected and islanded modes. Then, a distributed approach for regulating the voltage profile is proposed which utilizes volt-var control of smart inverter. Frequency regulation and coordination using frequency-watt control feature is also presented. After that, it is shown that power quality in terms of selective harmonic compensation, may be extended to be effective even under grid side fault events. A novel reconfigurable and flexible voltage control strategy is also proposed and shown to be effective to mitigate voltage fluctuations in a distribution network. As a bulk grid support application, low voltage ride through technique is discussed in detail. A novel inverter reference current calculation is proposed based on the Karush-Kuhn-Tucker optimal conditions. Different case scenarios are investigated with its intended application. The results found for each application demonstrate the effectiveness of the theoretical formulations presented and finally, provide future research challenges in this area.

Details
Author

Shuvra, Mahfuz Ali

Title

Grid-friendly Services of Smart Inverter and Battery Energy Storage System for Solar PV Integration in Advanced Distribution Networks

Physical Description

1 online resource (181 pages) : PDF

Date

2018

Degree Granting Institution

University of North Carolina at Charlotte

Abstract

Solar Photovoltaic (PV) power plants are changing the landscape of the electric power industry. The smart inverter is well-known for its versatility to integrate PV resources into the utility in a ‘grid-friendly’ manner. BESS deployment on the power grid facilitates this highly variable energy penetration by reducing the intermittency of PV resources. However, finding new applications of solar-storage combination would be needed to make it a cost-effective and reliable solution. In this context, voltage and frequency regulation, power quality and bulk-grid support applications are addressed in this work. At first, a droop-based BESS control is developed for grid-connected and islanded modes. Then, a distributed approach for regulating the voltage profile is proposed which utilizes volt-var control of smart inverter. Frequency regulation and coordination using frequency-watt control feature is also presented. After that, it is shown that power quality in terms of selective harmonic compensation, may be extended to be effective even under grid side fault events. A novel reconfigurable and flexible voltage control strategy is also proposed and shown to be effective to mitigate voltage fluctuations in a distribution network. As a bulk grid support application, low voltage ride through technique is discussed in detail. A novel inverter reference current calculation is proposed based on the Karush-Kuhn-Tucker optimal conditions. Different case scenarios are investigated with its intended application. The results found for each application demonstrate the effectiveness of the theoretical formulations presented and finally, provide future research challenges in this area.

Genre

doctoral dissertations

Subjects--Topics

Electrical engineering

Degree

Ph.D.

Keywords

Battery Energy Storage System
Frequency Control
Low Voltage Ride Through
Smart Inverter
Solar PV Integration
Voltage Control

Subject Area

Electrical Engineering

Advisor(s)

Chowdhury, Badrul

Committee Members

Manjrekar, Madhav
Cecchi, Valentina
Raja, M. Yasin

Degree Note

Thesis (Ph.D.)--University of North Carolina at Charlotte, 2018.

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Rights Holder Information

Copyright is held by the author unless otherwise indicated.

Identifier

Shuvra_uncc_0694D_11888

Permalink

http://hdl.handle.net/20.500.13093/etd:341