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Title: Energy storage requirements of dc microgrids with high penetration renewables under droop control

Journal Article · · International Journal of Electrical Power and Energy Systems
 [1];  [1];  [1];  [2]
  1. Michigan Technological Univ., Houghton, MI (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
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Energy storage is a important design component in microgrids with high penetration renewable sources to maintain the system because of the highly variable and sometimes stochastic nature of the sources. Storage devices can be distributed close to the sources and/or at the microgrid bus. In addition, storage requirements can be minimized with a centralized control architecture, but this creates a single point of failure. Distributed droop control enables a completely decentralized architecture but, the energy storage optimization becomes more difficult. Our paper presents an approach to droop control that enables the local and bus storage requirements to be determined. Given a priori knowledge of the design structure of a microgrid and the basic cycles of the renewable sources, we found that the droop settings of the sources are such that they minimize both the bus voltage variations and overall energy storage capacity required in the system. This approach can be used in the design phase of a microgrid with a decentralized control structure to determine appropriate droop settings as well as the sizing of energy storage devices.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1123297
Alternate ID(s):
OSTI ID: 1433585
Report Number(s):
SAND-2013-10581J; PII: S0142061514007972
Journal Information:
International Journal of Electrical Power and Energy Systems, Vol. 68, Issue C; ISSN 0142-0615
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (3)

Droop Control in DQ Coordinates for Fixed Frequency Inverter-Based AC Microgrids journal October 2019
Comparison of basic droop control with linear and nonlinear internal control of boost converters feeding resistive load journal January 2020
Isolated bidirectional DC-to-three-phase AC converter for integration of renewable energy sources to electric grid journal July 2019

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Related Subjects

25 ENERGY STORAGE
microgrid
energy storage
optimization
control