Integrated planning of low-voltage power grids and subsidies toward a distributed generation system – Case study of the diffusion of photovoltaics in a Japanese dormitory town

Energy ◽  
2017 ◽  
Vol 140 ◽  
pp. 779-793 ◽  
Author(s):  
Yutaka Nomaguchi ◽  
Hiroki Tanaka ◽  
Akiyuki Sakakibara ◽  
Kikuo Fujita ◽  
Yusuke Kishita ◽  
...  
Keyword(s):  
Distributed Generation ◽  
Low Voltage ◽  
Power Grids ◽  
Integrated Planning ◽  
Generation System

scholarly journals Optimization The Performance of a Synchronization Controller For a 3-Phase Photovoltaic Grid-Connected System

2018 ◽  
Vol 9 (2) ◽  
pp. 622
Author(s):  
Bennis Ghita ◽  
Karim Mohammed ◽  
Lagrioui Ahmed
Keyword(s):  
Distributed Generation ◽  
Power Factor ◽  
Low Voltage ◽  
Photovoltaic System ◽  
Generation System ◽  
Synchronization Algorithm ◽  
Utility Grid

In a distributed generation system, divers renewable agents are connected to the low voltage 3 phase utility grid by an inverter which is used as power condition and must assurance the higher efficiency of the renewable agent. To achieve this level of efficiency, a unitary power factor between the utility grid voltages and the inverter currents is necessary, and a synchronization algorithm is required for the perfect synchronization between the 3-phase utility grid and the renewable agent. The aim of this paper is to present the optimization of the performance of a Synchronization controller for a 3-phase photovoltaic grid-connected system, assessing its accuracy under different conditions and studying their drawbacks and advantages. A grid connected photovoltaic system with a nominal power of 5 kW is used so as to assess the behavior of the synchronization algorithm when the 3 phase utility grid is affected by some disturbances such as voltage unbalances.

Robust Design of System of Systems Using Uncertainty Assessment Based on Lattice Point Approach: Case Study of Distributed Generation System Design in a Japanese Dormitory Town

2016 ◽  
Vol 10 (5) ◽  
pp. 678-689 ◽  
Author(s):  
Yutaka Nomaguchi ◽  
◽  
Kazune Kawakami ◽  
Kikuo Fujita ◽  
Yusuke Kishita ◽  
...  
Keyword(s):  
Distributed Generation ◽  
Robust Design ◽  
Uncertainty Assessment ◽  
System Of Systems ◽  
Lattice Points ◽  
Strong Nonlinearity ◽  
Generation System ◽  
Large Uncertainty

A system of systems (SoS) is a class of complex systems that views multiple and small independent systems as part of a larger and more complex system. Because designing an SoS requires evaluation from a long-term viewpoint, it creates a large uncertainty. While researchers have proposed some robust design methods to handle the uncertainty of systems, they cannot be adopted to SoS design because of the SoS’s strong nonlinearity. This paper first discusses how difficult it is to handle uncertainty of SoS considering the SoS characteristics, and then proposes an approach of robust optimality with lattice points that is simple but plausible to sidestep the issue of nonlinearity. A case study of designing a distributed generation (DG) system, which is a typical SoS, in a Japanese dormitory town is demonstrated in order to verify the proposed approach. The results reveal that this approach helps a designer decide the appropriate amount of subsidy in terms of the robustness of DG installation.

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