scholarly journals Implementation of a Microgrid Scheme Using a MVDC Connection between Gapado Island and Marado Island in South Korea

Energies ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 187
Author(s):  
Jinhong Ahn ◽  
Eel-Hwan Kim
Keyword(s):  
Power Generation ◽  
Power System ◽  
Wind Power ◽  
Distribution Systems ◽  
Solar Power ◽  
Major Power ◽  
Power Generators ◽  
Diesel Generators ◽  
Wind Power Generators ◽  
The Impact

In this paper, we propose a microgrid (MG) implementation method through Medium-Voltage Direct Current (MVDC) connection between Gapado Island and Marado Island in Korea. MVDC is a facility that can be efficiently applied between small power generation complexes. The structure of power generation facilities is mainly supplied by diesel generators, while solar and wind power generators supply additional power. An Energy Storage System (ESS) is also used to reduce the output fluctuations of wind and solar power generation. Since power systems in such areas are low-voltage and low-power distribution systems, problems can arise in terms of power management due to power generators with variable output characteristics such as solar power and wind power generators. In addition, when a major power source such as a diesel generator is dropped, the power system collapses. However, these problems can be solved by interchanging the power between the micro-grids through the connection of MVDCs. With the MVDC connected, we verify the impact of the power system on Marado Island and Gapado Island due to the input and opening of solar, wind and diesel generators. The proposed configuration uses the PSCAD/EMTDC simulation program.

scholarly journals Airflow Characteristics According to the Change in the Height and Porous Rate of Building Roofs for Efficient Installation of Small Wind Power Generators

2021 ◽  
Vol 13 (10) ◽  
pp. 5688
Author(s):  
Jangyoul You ◽  
Kipyo You ◽  
Minwoo Park ◽  
Changhee Lee
Keyword(s):  
Wind Speed ◽  
Wind Power ◽  
Turbulence Intensity ◽  
Flow Characteristics ◽  
High Porosity ◽  
Power Generators ◽  
Speed Reduction ◽  
Reduction Effect ◽  
Wind Power Generators ◽  
The Impact

In this paper, the air flow characteristics and the impact of wind power generators were analyzed according to the porosity and height of the parapet installed in the rooftop layer. The wind speed at the top was decreasing as the parapet was installed. However, the wind speed reduction effect was decreasing as the porosity rate increased. In addition, the increase in porosity significantly reduced turbulence intensity and reduced it by up to 40% compared to no railing. In the case of parapets with sufficient porosity, the effect of reducing turbulence intensity was also increased as the height increased. Therefore, it was confirmed that sufficient parapet height and high porosity reduce the effect of reducing wind speed by parapets and significantly reducing the turbulence intensity, which can provide homogeneous wind speed during installation of wind power generators.

Distribution System Fault Recovery with Undispatchable Distributed Generations

2014 ◽  
Vol 529 ◽  
pp. 455-459
Author(s):  
Nan Xu ◽  
Shan Shan Li ◽  
Hao Ming Liu
Keyword(s):  
Wind Power ◽  
Distribution System ◽  
Distribution Systems ◽  
Solar Power ◽  
Equivalent Model ◽  
Point Estimate ◽  
Fault Recovery ◽  
Recovery Method ◽  
Multi Objective ◽  
The Impact

Considering the probabilistic of the wind power and the solar power, a fault recovery method for distribution systems with the wind power and the solar power is presented in this paper. For the wind power, a simplified steady-state equivalent model of an asynchronous wind generator is added into the Jacobian matrix to consider the impact of the wind power on systems. For the solar power, its output is considered as an injected power which is related with solar irradiance. Three-point estimate is employed to solve the probabilistic power flow of distribution systems with the wind power and the solar power. The restoration is described as a multi-objective problem with the mean of the system loss and the number of switch operations. Fast elitist non-dominated sorting partheno-genetic algorithm is used to solve this multi-objective problem. IEEE 33-bus system is used as an example and the results show that the models and algorithms in this paper are efficient.

Using Renewable Energy Hybrid Power Generation Technology in South Xinjiang

2013 ◽  
Vol 448-453 ◽  
pp. 4399-4404
Author(s):  
Asifujiang Abudureyimu ◽  
Qian Han ◽  
Ping Ji Qiu
Keyword(s):  
Power Generation ◽  
Power System ◽  
Wind Power ◽  
Solar Power ◽  
Hybrid Power ◽  
Operation Conditions ◽  
Power Turbine ◽  
Practical Operation ◽  
Output Characteristics ◽  
Realization Process

This paper presents a realization process of a hybrid system consisting of biomass and wind as well as solar power generation on the target region. The installation principle and procedure are introduced based on the conditions of natural energy such as wind speed and solar radiation degree. The output characteristics from 20kW biomass generator is explained and analyzed in according to coop rational possibility with the wind power and solar power system. The operation characteristics of 40kW wind power turbine is provided based on the practical operation data collected within three years and the simulated results obtained from the software calculation. The operation conditions of 20.6kW solar power system is also analyzed based on the solar irradiance density in the located site. The general efficiency of this triple hybrid power system in economic and environment aspects is also studied by using and comparing the simulation methodology and the data in practical operation.

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