To meet growing energy needs, special attention must be paid to integrating transmission lines in the development of power systems. power transmission lines have been extended to hybrid (AC/DC) transmission modes. Owing to the mutual interaction of lines, the traditional protection schemes are...

From the perspective of global warming mitigation and depletion of energy resources, renewable energy such as wind generation (WG) and photovoltaic generation (PV) are getting attention in distribution systems. Additionally, all-electric apartment houses or residence such as DC smart houses are...

Recently, dispersed generators have been installed in distribution network to supply power to commercial facilities. Renewable energy generation contains output power fluctuations and distributed generator produces sluggish response for power demand. In order to overcome these problems, an ultra...

This paper deals with a DC-micro-grid with renewable energy. The proposed method is composed of a gearless wind power generation system, a battery, and DC loads in a DC distribution system. The battery helps to avoid the DC over-voltages by absorbing the power of the permanent magnet synchronous...

This article examines the causal relationship between the Current Account (CA) and the Capital Account (KA) for Korea in a multivariate framework. The estimation results indicate the existence of bidirectional causality between the KA and the CA. The findings imply that an inflow of capital...

Nowadays, wind turbine generator (WTG) is increasingly required to provide control capabilities regarding output power. Under this scenario, this paper proposes an output power control of WTG using pitch angle control connected to small power systems. By means of the proposed method, output...

Using the modified Wald test suggested by Toda and Yamamoto (1995), the study examines whether higher budget deficits lead to greater current account deficits in Korea. This test allows one not only to examine the general validity of twin deficits hypotheses, but also to predict future Korean...