Korea Institute of Energy Research

Korea Atomic Energy Research Institute

Jin Ju Park

Su Yong Chae

Suk In Park

Gyu Duk Kim

Sea Seung Oh

Seung Weon Yu

Young Rang Uhm

Yoon Dong Sung

Chang Kyu Rhee

Min Ku Lee

Hi Min Lee

Yu Jin Song

Byung Sun Han

Sea Shung Oh

Seung-Hee Woo

Gyoung Ja Lee

Byung Hoon Kim

Kyu Hyun Park

The present provides an arc detection apparatus that includes: a current sensor configured to sense the first current that flows through the first line of a system in which the influence of noise according to the operation is detected in the first frequency band; a frequency data creator configured to digitally process sensed values of the first current in the first time period and the second time period, respectively, in order to thereby create the first frequency data and the second frequency data for the first frequency band; and an arc determination unit configured to determine the possibility of the generation of an arc of the system according to comparison data between the first frequency data and the second frequency data.

Arc detection apparatus, arc detecting method, and power system

Provided is a converter system including: a plurality of converter modules connected to one power source in parallel; and a controller for storing mapping information of first parameters corresponding to processing power of the converter modules and second parameters corresponding to the number of converter modules that optimally process the processing power among the converter modules, configuring a value of the first parameter according to a measurement value of power input into the converter modules or power output from the converter modules, calculating a value of the second parameter by substituting the value of the first parameter into the mapping information, selecting the number of converter modules corresponding to the value of the second parameters as active converter modules from the converter modules and processing the processing power by using the active converter modules, and controlling output power of the active converter module to gradually increase or decrease in a transient state where the value of the second parameter is changed.

Converter system using efficient map and method of controlling same

Disclosed is a method of manufacturing a metal oxide nano powder comprising preparing a first dispersed solution by adding a nano-sized metal powder to water and dispersing the metal powder within the water, performing a hydration reaction of the first dispersed solution at a temperature of about 30 to about 70&#xb0; C. to generate a precipitation, and filtering and drying the precipitation to prepare a metal oxide powder. Also, disclosed is a metal oxide nano powder manufactured by the method described above, and having any one of a bar-form, a cube-form, and a fiber-form.

Metal oxide nano powder and manufacturing method of the same

Growing community of inventors

Daejeon, South Korea

Jin Ju Park