Efficient Phasor-Based Dynamic Volt/VAr and Volt/Watt Analysis of Large Distribution Grid with High Penetration of Smart Inverters

Koutenaei, Maryam Mahmoudi; Nguyen, Thai-Thanh; Vu, Tuyen; Paudyal, Sumit; Hovsapian, Rob

doi:10.1109/tsg.2021.3138741

Efficient Phasor-Based Dynamic Volt/VAr and Volt/Watt Analysis of Large Distribution Grid with High Penetration of Smart Inverters

Journal Article · Mon Dec 27 23:00:00 EST 2021 · IEEE Transactions on Smart Grid

DOI:https://doi.org/10.1109/tsg.2021.3138741· OSTI ID:1841969

Koutenaei, Maryam Mahmoudi ^[1]; Nguyen, Thai-Thanh ^[2]; Vu, Tuyen ^[2]; Paudyal, Sumit ^[1]; Hovsapian, Rob ^[3]

Florida International Univ. (FIU), Miami, FL (United States)
Clarkson Univ., Potsdam, NY (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)

As the penetration of power-electronics based smart inverters (SIs) is increasing in distribution grids, it adds computational challenges in solving dynamic models of large-scale distribution feeders. Voltage and reactive power (Volt/VAr), and voltage and active power (Volt/Watt) dynamics have been analyzed at slower time scales akin to the control of legacy grid devices. However, smart inverters, being power-electronics based devices, can provide dynamic active/reactive power support at a faster time scale, which necessitates Volt/VAr and Volt/Watt dynamics to be analyzed at a faster time scale. The existing dynamic models are overly detailed and computationally intractable for distribution feeders with a large number of inverters. In this context, this proposed work aims towards developing a computationally tractable, scalable, and accurate phasor-based model for dynamic Volt/VAr and Volt/Watt analyses of large distribution systems with high penetration of smart inverters. Case studies demonstrate that the proposed phasor-based model sufficiently captures the Volt/VAr and Volt/Watt dynamics, and is computationally faster by one order of magnitude compared to the average model and by two orders of magnitude compared to the detailed switching model. Case studies also demonstrate the efficacy and scalability of the proposed model in analyzing Volt/VAr and Volt/Watt dynamics of large-scale power networks with hundreds of SIs.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1841969

Report Number(s):: NREL/JA-5C00-81948; MainId:82721; UUID:46a51922-bb89-42bb-aef5-735d998c86f3; MainAdminID:63699

Journal Information:: IEEE Transactions on Smart Grid, Journal Name: IEEE Transactions on Smart Grid Journal Issue: 5 Vol. 13; ISSN 1949-3053

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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Efficient Phasor-Based Dynamic Volt/VAr and Volt/Watt Analysis of Large Distribution Grid with High Penetration of Smart Inverters

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