Sk Innovation Co., Ltd.

Korea Electric Power Corporation

Sk Global Chemical Co., Ltd.

So-Young Park

Sung-Woo Lee

Min-Ho Park

Bok-Nam Ha

Sung-Kwan Kim

Chang-Hoon Shin

Yong-Rak Moon

Ju-Eun Jung

The present invention relates to an EPDM resin blend composition, which includes a first EPDM resin matrix and a second EPDM resin, wherein a ratio (M/M) of a weight average molecular weight of the first EPDM resin matrix to a weight average molecular weight of the second EPDM resin ranges from 0.75 to 1.33, and the second EPDM resin has a narrower molecular weight distribution (M/M) than the first EPDM resin matrix, and to a method for preparing the same.

Ethylene-alpha olefin-diene resin blend composition and method for preparing the same

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

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Daejeon, South Korea

So-Young Park