DOI:10.1007/s40565-017-0334-8 |
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Security-constrained line loss minimization in distribution systemswith high penetration of renewable energy using UPFC |
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Net amount: 950 |
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Author:
Pengcheng SONG1
, Zheng XU1 , Huanfeng DONG1,
Hui CAI2
, Zhenjian XIE2
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Author Affiliation:
1 Department of Electrical Engineering, Zhejiang University,
Hangzhou, China
2 State Grid Jiangsu Economic Research Institute, Nanjing,
China
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Foundation: |
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Abstract: |
Focused on the challenges raised by the largescale
integration of renewable energy resources and the
urgent goal of energy saving, a novel control scheme for
the unified power flow controller (UPFC) series converter
is proposed to achieve line loss reduction and security
enhancement in distribution systems with a high penetration
of renewable energy. Firstly, the line loss minimum
conditions of a general distribution system with loop con-
figurations are deduced. Secondly, security constraints
including the permissible voltage range, the line loading
limits and the UPFC ratings are considered. System security
enhancement with the least increase in line loss is
tackled by solving a much reduced optimal power flow
(OPF) problem. The computational task of the OPF problem
is reduced by deducing the security-constrained line
loss minimum conditions and removing the equality
constraints. Thirdly, a hybrid control scheme is proposed.
Line loss minimization is achieved through a dynamic
controller, while an OPF calculator is integrated to generate
corrective action for the dynamic controller when the
security constraints are violated. The validity of the proposed
control strategies is verified in a modified IEEE 33
bus test system. |
Keywords: |
Line loss minimization, Security enhancement,
Unified power flow controller (UPFC), Renewable energy |
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Online Time:2017/11/27 |
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