DOI:https://doi.org/10.1007/s40565-018-0461-x |
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Coordinated control for medium voltage DC distribution centerswith flexibly interlinked multiple microgrids |
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Page view: 0
Net amount: 1087 |
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Author:
Lei QIAO1
, Xialin LI1
, Di HUANG1
, Li GUO1
, Yutao XU2
,
Zhukui TAN2
, Chengshan WANG1
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Author Affiliation:
1. The Key Laboratory of Smart Grid of Ministry of Education,
Tianjin University, Tianjin 300072, China
2. Electric Power Research Institute, Guizhou Power Grid Co.
Ltd., Guiyang 550002, China
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Foundation: |
This work was supported by National Nature
Science Foundation of China (No. 51507109, No. 51707128), Science
and Technology Project of China Southern Power Grid (No.
GZKJQQ00000417). |
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Abstract: |
From flexible interconnection among feeders to
hybrid alternating current (AC) and direct current (DC)
distribution structures of future smart distribution systems,
medium-voltage DC distribution centers with flexibly
interlinked multiple microgrids (MGs) will have wide
applications on the demand side. A generic coordinated
control framework based on a distributed cooperation
scheme is proposed for such DC centers, as opposed to
centralized control structures. A novel unified control only
using local measurements is proposed for these interlinking
converters. During normal power disturbances, automatic
coordinated power control and mutual support among subsystems can be realized, thereby improving DC voltage and
AC frequency stability to enable multiple MGs to be
treated as a real unified cluster. Moreover, with this
method, interlinking converters can realize seamless transition in power dispatching mode, common DC bus voltage
control mode, and MG support mode without communication and control system switching. A simplified dynamic
model has been developed to verify the proposed control
strategy. This work is expected to provide a new solution
for flexible interconnection and operational control of
large-scale MG clusters. |
Keywords: |
Medium-voltage DC distribution centers,
Multiple microgrids, Flexible interconnection, Coordinated
control, Seamless transition |
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Online Time:2019/05/14 |
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