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A hybrid architecture for volt-var control in active distribution grids

Journal Article · · Applied Energy
 [1];  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); OSTI
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Modern active distribution grids are characterized by the increasing penetration of distributed energy resources (DERs). The proper coordination and scheduling of a large numbers of these small-scale and spatially distributed DERs is necessary, and warrants the use of novel distributed approaches. In this paper, we propose a hybrid volt-var control architecture for the distribution grid, which leverages existing centralized and local approaches to planning, decision making, and control, and augments it with distributed optimization and distributed control for DER management. First, we propose a convex model to describe the power physics of distribution grids of meshed topology and unbalanced structure, based on current injection and McCormick Envelopes. Second, we employ the distributed proximal atomic coordination (PAC) algorithm to coordinate DERs to provide voltage support. We implement volt-var optimization by optimally coordinating DERs including PV smart inverters and demand response. We present results using the IEEE-34 bus network, using real data from a distribution feeder in Hawaii, to model load and PV generation. Different levels of DER penetration and objective functions are simulated. Finally, our results show the need for the coordination of DERs to improve voltage profiles, even in networks with existing voltage control devices. Further, we show the need for flexible reactive power capabilities to achieve desired grid performance.

Research Organization:
Washington State Univ., Pullman, WA (United States)
Sponsoring Organization:
USDOE Office of International Affairs (IA)
Grant/Contract Number:
IA0000025
OSTI ID:
1976850
Alternate ID(s):
OSTI ID: 1847006
Journal Information:
Applied Energy, Journal Name: Applied Energy Journal Issue: C Vol. 312; ISSN 0306-2619
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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