English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

It is predicted that a micro-grid technique is effective about a backup power supply in an emergency, a peak cut of power plants, and exhaust heat utilization. Furthermore, when renewable energy is connected to a micro-grid, there is potential to reduce the amount of greenhouse gas discharge (Abu-Sharkh et al., 2006, Carlos & Hernandez, 2005, Robert, 2004). A micro-grid has an interconnection system with commercial power etc., and the independence supplying system of the power. The micro-grid with an interconnection system outputs and inputs the power between other grids. Therefore, the dynamic characteristic of the grid is influenced by the grid of a connection destination. When a microgrid and a large-scale grid such as a commercial power system are interconnected, the dynamic characteristics of the power depend on the commercial power system. For this reason, in the micro-grid of the interconnection type, the option of the equipment to connect is wide. On the other hand, since micro-grid can reduce transportation loss of power and heat, this technique may become the major energy supply. The method of connecting two or more small-scale fuel cells and renewable energy equipment by a micro-grid, and supplying power to the demand side is effective in respect of environmental problems. So, this paper examines the independent micro-grid that connects fuel cells and wind power generation. In order to follow load fluctuation with an independent grid system, there are a method of installing a battery and a method of controlling the output of power generators. Since the battery is expensive, in this paper, it corresponds to load fluctuation by controlling the power output of the fuel cell. The output adjustment of the fuel cell has the method of controlling the production of electricity of each fuel cell, and the method of controlling the number of operations of the fuel cell. However, adjustment of the production of electricity of each fuel cell connected to the micro-grid may operate some fuel cell with a partial load with low efficiency. So, in this paper, the number of operations of fuel cells is controlled to follow fluctuations in the electricity demand. In an independent micro-grid, a certain fuel cell connected to the micro-grid is chosen, and it is considered as a power basis. The power (voltage and frequency) of the other fuel cells is controlled to synchronize with this base power. Therefore, if the fuel cell that outputs base power is unstable, the power quality of the whole grid will deteriorate. Fuel cells other than base load operation are controlled to synchronize with the base power. The power quality

Power Characteristics of Compound Microgrid Composed from PEFC and Wind Power Generation