Sang-Bong Rhee

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This paper presents a fuzzy-GA method to resolve dispersed generator placement for distribution systems. The problem formulation considers an objective to reduce power loss costs of distribution systems and the constraints with the number or size of dispersed generators and the deviation of the bus voltage. The main idea of solving fuzzy nonlinear goal(More)
We suggested that the neutral line is a more effective location for a superconducting fault current limiter (SFCL) in a three-phase power system. To confirm it, we analyzed the quench and recovery characteristics of SFCL applied into the neutral line in cases of non-symmetrical ground faults, such as single line-to-ground and double line-to-ground faults.(More)
A conventional superconducting fault current limiter (SFCL) is usually only connected to a power system for fault current limitation. The study described in this paper, however, attempts to use the hybrid SFCL application to reduce the transformer inrush current. To accomplish this, this paper first suggests the concepts to expand the scope of the SFCL(More)
This paper presents a method to assess total transfer capability (TTC) by using energy function. TTC assessment is to calculate TTC by using the repeated power flow (RPF) method. TTC is limited not only by the violation of system voltage and thermal limits, but also restricted by transient stability limit. The transient energy margin is the difference(More)
Abstract: Electric vehicles (EVs) have been gaining popularity in recent years due to growing concerns about fuel depletion and increasing petrol prices. Random uncoordinated charging of multiple EVs at residential distribution feeders with moderate penetration levels is expected in the near future. This paper describes a high performance voltage controller(More)
This paper presents an optimal power flow method based on the generation rescheduling priority to enhance transient stability in power systems. In order to determine the generation rescheduling priority the energy margin sensitivity indices are calculated. The candidate generators for generation rescheduling are determined by the energy margin sensitivity(More)
To transmit an accurate, reliable and flexible power without any distortion to consumer is a serious issue and challenging to industry especially for engineer. During transmission, a lot of power problem occur which affect the power system operation and efficiency. There are several issues regarding power quality of which harmonics affect the power system(More)
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