Korea Electric Power Corporation

Chang-Hoon Shin

Byung-Hak Cho

Sung-Woo Lee

Bok-Nam Ha

Min-Ho Park

So-Young Park

Seong-Il Song

Seung-Hyun Byun

Seong-Ii Song

Provided are a novel distribution automation system and its voltage control method, which can supply a stable voltage to a user by properly adjusting the settings of a control device so as to compensate for reactive power at each load terminal. The voltage control method includes: a first step of modeling a distribution system in the form of a distribution load based on constants of four terminals according to the connection type of each node and a distribution line, which constitute the distribution system; a second step of determining a formula for estimating the magnitude of a voltage at a node from a current value of an adjacent node; a third step of determining an objective function including the magnitude of the voltage, calculated through the formula determined in the second step, and a control variable for controlling the magnitude of the voltage; and a fourth step of calculating a value of the control variable to allow the determined objective function to have a minimum value and applying the calculated value to each voltage control device provided in the distribution system.

Distribution automation system for reactive power compensation and its voltage control method

A neutron flux mapping system for a nuclear reactor including: drivers each including a geared motor, a helical gear driven by the geared motor, and a storage reel adapted to supply, to the helical gear, a detector cable carrying a detector; and a double indexing path selector unit including upper and lower fixed plates, a fixed shaft, an outer path selector rotatably mounted to the upper fixed plate, and inner path selectors. The outer path selector includes an upper rotating plate rotatably mounted to the upper fixed plate while carrying a drive unit for rotating the outer path selector about the fixed shaft, and a control unit for controlling the drive unit, and a lower rotating plate connected to the upper rotating plate. Each inner path selector includes a hollow rotating shaft rotatably mounted between the upper and lower rotating plates, a path select tubing connected to the rotating shaft to rotate along with the rotating shaft, and a disc mounted to a lower end of the rotating shaft, and provided with a plurality of circumferentially-arranged paths.

Neutron flux mapping system for nuclear reactor

Growing community of inventors

Daejeon, South Korea

Chang-Hoon Shin