Wei-Tzer Huang - IEEE Xplore Author Profile

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This paper aims to analyze the power flow of a grid-connected 11.4 kV high-voltage microgrid (MG) with various distributed resources (DRs). First, related papers and technological reports were extensively surveyed. Accordingly, five different types of DRs and their controllable loads were considered for integration into two 11.4 kV primary feeders. These DRs include two 1.5 MW diesel engine genera...Show More
Renewable energy generating units (REGNs) are widely used in microgrids (MGs). REGNs can reduce the operating cost of a MG; they also affect the operating states of the connected grids, especially the voltages. The larger the power generation of REGNs, the greater the impact on voltage of MGs. Therefore, the power generation of a REGN in a MG should be limited for the grid security. In the current...Show More
The main purpose of this paper is to analyze the operation and nature of a low-voltage AC microgrid with various distributed energy resources (DERs). First, a 400 V low-voltage AC microgrid integrated with a 30 kW microturbine generator, a 13 kW photovoltaic generation system, a 10 kW fuel cell generation system, and a 10 kVA wind turbine generator was employed as the sample system. Second, a sequ...Show More
Using the fuzzy set theory, this study presents three changeable single-feeding-end fuzzy feeder models that simplify complicated distribution system calculations. The proposed models are generated using lumped loads to represent discretely distributed tapped-off loads along a feeder. These models accurately simulate total series voltage drop at the end of given feeder, total copper loss and a hyb...Show More
The feasibility study of upgrading primary feeders from radial and open loop to a normally closed-loop arrangement have been explored in this paper. First, three possible feeder arrangements for forming a normally closed loop are discussed, and then the factors that may predominantly affect the system-type upgrading are discussed theoretically. Next, four existing distribution feeders with origina...Show More