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Title: Distributed control system for parallel-connected DC boost converters

The disclosed invention is a distributed control system for operating a DC bus fed by disparate DC power sources that service a known or unknown load. The voltage sources vary in v-i characteristics and have time-varying, maximum supply capacities. Each source is connected to the bus via a boost converter, which may have different dynamic characteristics and power transfer capacities, but are controlled through PWM. The invention tracks the time-varying power sources and apportions their power contribution while maintaining the DC bus voltage within the specifications. A central digital controller solves the steady-state system for the optimal duty cycle settings that achieve a desired power supply apportionment scheme for a known or predictable DC load. A distributed networked control system is derived from the central system that utilizes communications among controllers to compute a shared estimate of the unknown time-varying load through shared bus current measurements and bus voltage measurements.
Inventors:
Issue Date:
OSTI Identifier:
1375217
Assignee:
MICHIGAN TECHNOLOGICAL UNIVERSITY SNL-A
Patent Number(s):
9,733,287
Application Number:
14/215,373
Contract Number:
AC04-94AL85000
Resource Relation:
Patent File Date: 2014 Mar 17
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION

Other works cited in this record:

A classification and evaluation of paralleling methods for power supply modules
conference, January 1999

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