An Improved Control and Energy Management Strategy of Three-Level NPC Converter Based DC Distribution Network

[...]the proposed DC distribution network can be depicted as a cyber-physical intelligent system resulted from the fusion of power semi-conductors, communications, sensors, control and scientific computation. According to the topology of three-level VSC, the AC-side equations are L1diddt=Vtd−Vsd+L1ω...

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Bibliographic Details
Published in:Energies (Basel) 2017-10, Vol.10 (10), p.1635
Main Authors: Wang, Yuqi, Xu, Qingshan, Ma, Zhoujun, Zhu, Hong
Format: Article
Language:English
Subjects:
2DOF controller
Alternating current
Alternative energy sources
bipolar system
Capacitance
Communications systems
Conductors
Control algorithms
Controllers
Converters
Cooperative control
Data buses
DC distribution network
Distribution management
Energy management
Energy resources
Load
Power factor
three-level NPC converter
Topology
Transfer functions
Variable gain
voltage equalization
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Summary:[...]the proposed DC distribution network can be depicted as a cyber-physical intelligent system resulted from the fusion of power semi-conductors, communications, sensors, control and scientific computation. According to the topology of three-level VSC, the AC-side equations are L1diddt=Vtd−Vsd+L1ω0iq−R1id,L1diqdt=Vtq−L1ω0id−R1iq, where id,iq are d-axis and q-axis components of AC-side currents, respectively. εt is obtained from PLL connected to the AC utility grid. 3.2. According to Equation (11) and the assumption that current amplitude and power factor vary slowly, the control transfer function is linear with variable gain. [...]the parameters of the three-level NPC converter and DC bus capacitance can also vary with time, temperature and operation state. [...]the reliable performance of the cooperative controller needs the support of a reliable communication system.
ISSN:1996-1073
1996-1073
DOI:10.3390/en10101635