1990년대의 초강대국과 동아시아: 한반도의 안보에 대한 함의

노경수 서울대학교 국제문제연구소 1990 세계정치 Vol.14 No.1

클린턴 행정부의 대북정책

노경수 사회과학원 1999 계간 사상 Vol.40 No.-

국내의 공공시설에 대한 효율적인 복구기법 연구

노경수 국가위기관리학회 2016 국가위기관리학회보 Vol.8 No.1

재해복구는 피해가 발생한 직후부터 피해지역이 원래의 정상적인 상태로 돌아올 때까지 지원을 제공하는 지속적인 활동을 의미한다. 현행 복구사업은 소관 부처별로 공공시설물 기 능회복에 중점을 두고 있어 피해원인의 근원적 해소 및 피해재발 방지에 한계가 있다. 본 연구에서는 여러 설계기준에서 다루고 있는 공공시설물의 주요인자들에 대한 표준안 작성과 국내 재해복구 사례검토를 통한 공공시설물의 효율적 복구기법에 대해 조사하였다. 연구결 과, 국내의 공공시설 기준은 외국의 기준을 사용하는 사례가 많으므로 지형지역 특성에 맞 는 시설기준의 변경, 보완이 필요한 것으로 나타났다. 금회 조사된 동일 시설물에 대하여 기 준이 상이한 경우 국내외 공공시설 설계기준을 서로 비교하여 통합설계기준(안)을 제시하였 다. 또한 복구기법에 대한 분석결과를 바탕으로 나타난 문제점에 대하여 개선방안을 도출하 였다. 공공시설물의 효율적인 복구기법을 개발하기 위해 기초자료를 제공하는 것이 본 연구의 목적이다. Disaster recovery refers to ongoing activities that provide assistance from the moment the damage occurs until the damaged area returns to its normal state. The current restoration project focuses on restoring the function of public facilities by each department, so there is a limit in preventing the root cause and the recurrence of damage. In this study, we investigated the efficient recovery method of public facilities by preparing standards for major factors of public facilities and reviewing disaster recovery cases. As a result, there are many cases where the domestic standard of public facilities is based on foreign standards. Therefore, in case of different standards for the same facilities surveyed this time, the design standards of public facilities in Korea and abroad were compared with each other and the integrated design standard (draft) was proposed. In addition, the improvement method was developed based on the analysis result of the recovery technique. The purpose of this study is to provide basic data to develop efficient restoration techniques of public facilities.

Comparison of Methods for Calculating Reactive Power Service Charge and Proposing a New Method using Reactive Power Markets

노경수,최준호,Ro, Kyoung-Soo,Choi, Joon-Ho The Korean Institute of IIIuminating and Electrica 2006 조명·전기설비학회논문지 Vol.20 No.5

전력산업이 수직독점적인 구조에서 규제완화의 경쟁체제로 전환됨에 따라 무효전력서비스의 요금산정이 전력시장 운영자에게는 새로운 이슈가 되고 있다. 본 논문은 몇몇의 선진국과 국내에서 채용되는 무효전력서비스에 대한 요금산정방법을 검토하고, 무효전력시장을 이용하는 새로운 요금산정방법을 제안한다. 무효전력시장은 무효전력 발전원이 제시하는 입찰값을 바탕으로 하루전 전력시장 후에 무효전력 최적조류계산을 거쳐 단일가격으로 결정된다. 제안하는 방법은 무효전력 설치용량에 대한 투자비뿐만 아니라 무효전력 생산량을 늘리기 위해 발전기가 줄이게 되는 유효전력에 대한 기회비용을 함께 고려하고 있다. 26모선 모델계통에서의 사례연구를 통하여 제안하는 방법의 효용성을 입증하고 있다. As electric power systems have been moving from a vertically integrated structure to a deregulated environment, calculating reactive power service charges is a new challenging theme for market operators. This paper examines various methods for reactive power management adopted in some deregulated foreign and domestic markets and then proposes a new method to calculate reactive power service charges using a reactive power market. The reactive power market is operated based on bids from the generating sources and is settled on uniform prices by running reactive OPF programs after the day-ahead electricity market. The proposed method takes into account recovering not only the costs of installed capacity but also the lost opportunity costs incurred by reducing active power output to increase reactive power production. A numerical sample study is carried out to illustrate the processes and appropriateness of the proposed method.

계통연계 풍력발전시스템의 최대출력제어를 위한 신경회로망 제어기에 관한 연구

노경수,추연식 한국조명.전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.2

This paper presents a neural network controller of a grid-connected wind energy conversion system for extracting maximum power from wind and a power controller to transfer the maximum power extracted into a utility grid. It discusses the modeling and simulation of the wind energy conversion system with the controllers, which consists of an induction generator, a transformer, a link of a rectifier, and an inverter. The paper describes the drive train model, induction generator model and grid-interface model for dynamics analysis. Maximum power extraction is achieved by controlling the pitch angle of the rotor blades by a neural network controller. Pitch control method is mechanically complicated, but the control performance is better than that of the stall regulation. The simulation results performed on MATLAB show the variation of the generator torque, the generator rotor speed, the pitch angle, and real/reactive power injected into the grid, etc. Based on the simulation results, the effectiveness of the proposed controllers is verified. 본 논문은 바람으로부터 최대출력을 추출하기 위해 계통연계 풍력발전시스템의 신경회로망 제어기와 추출된 최대출력을 계통에 전달하기 위한 전력제어기를 제안한다. 유도발전기, 변압기, 정류기 및 인버터 등으로 구성된 제어기를 갖춘 풍력발전시스템의 모델링과 시뮬레이션에 대해 검토하고자 한다. 본 논문에서는 동특성해석을 위해 드라이브 트레인 모델, 유도발전기 모델과 계통접속 모델을 제시한다. 신경회로망 제어기는 풍차날개의 피치각을 제어하여 바람으로부터 최대출력을 추출한다. 피치제어방법은 기계적으로 복잡하지만 제어성능은 스톨제어보다 우수하게 된다. MATLAB으로 수행한 시뮬레이션 결과는 발전기 토오크, 발전기 회전속도, 피치각, 계통으로 주입되는 유효/무효전력 등을 예시하고 있으며 그 결과를 보면 제안된 제어기의 효용성을 입증할 수 있다.

Allocation of Real Power losses to Individual Loads Under Competition of Deregulated Power Industries

노경수,Ro, Kyoung-soo The Korean Institute of IIIuminating and Electrica 2004 조명·전기설비학회논문지 Vol.18 No.6

본 논문은 전력산업이 경쟁체제로 전환되어 전력시장으로 운영될 경우 보조서비스의 하나인 유효전력손실 배분에 관한 것으로 손실배분계수를 이용하여 유효전력 손실을 부하에 배분하는 방법을 제안하며 아울러 제안하는 방법을 한계손실계수를 이용하는 방법과 비교하고자 한다. 제안하는 방법은 먼저 손실배분계수를 정의하며 이것을 이용하여 유효전력 손실에 대한 각 부하의 분담분을 계산한다. 9-모선 샘플시스템에 대한 사례연구를 통하여 제안하는 알고리즘의 효용성을 입증하고 있으며 한계손실계수를 이용하는 것보다 손실배분계수를 이용하여 유효전력손실을 부하에 배분하는 것이 타당하다는 주장을 담고 있다. The paper proposes a method calculate the allocations of real power losses in transmission lines to individual loads based on loss distribution factors and compares them with those using marginal loss factors. The proposed method is implemented by defining loss distribution factors and analysing the individual loads' shares in the transmission line losses. Computer simulations on a 9-bus sample system verify effectiveness of the algorithm proposed and give an assertion that it is desirable to allocate power losses to loads using loss distribution factors rather than based on marginal loss factors.

고능력 젖소 축군의 집단번식관리프로그램 적용에 의한 번식효율의 개선

노경수,김의형,남현욱,서국현,강현구,김일화 충남대학교 형질전환복제돼지연구센터 2004 논문집 Vol. No.8

We investigated the effect of reproductive herd health program (RHHP) on the reproductive performance in high yielding dairy herds. Data collected from 205 lactations at Boeun County, Chungbuk from April 2001 to Dec. 2003 included postpartum reproductive and metabolic diseases, body condition score (BCS), reproductive performance and milking records. First we compared the reproductive performance of cows without RHHP (pre-RHHP group) and cows with RHHP (RHHP group). Intervals from calving to first service (99.6 vs. 81.8 days) and to conception (160.3 vs. 131.8 days) were shorter in the RHHP group than in the pre-RHHP group. Secondly, we determined the effect of milk yield (305 days) on the occurrence of postpartum diseases, BCS changes, and reproductive performance in cows under RHHP, The occurrence of metritis and metabolic diseases were greater in the over-10,000 kg group than in the under-l0,000 kg group. The over-10,000 kg group lost more body condition than the under-10,000 kg group from calving to month 3 postpartum. Nevertheless, reproductive performance did not differ between the two groups. These results indicate that reproductive performance can be improved by the application of RHHP in high yielding dairy herds and that reproductive performance in the cows under RHHP are not affected by high milk yielding.

Simulation for Pitch Angle Control Strategies of a Grid-Connected Wind Turbine System on MATLAB/Simulink

노경수,최준호,Ro, Kyoung-Soo,Choi, Joon-Ho The Korean Institute of IIIuminating and Electrica 2007 조명·전기설비학회논문지 Vol.21 No.1

This paper presents a pitch angle controller of a grid-connected wind turbine system for extracting maximum power from wind and implements a modeling and simulation of the wind turbine system on MATLAB/Simulink. It discusses the maximum power control algorithm for the wind turbine and presents, in a graphical form, the relationship of wind turbine output, rotor speed, and power coefficient with wind speed when the wind turbine is operated under the maximum power control algorithm. The objective of pitch angle control is to extract maximum power from wind and is achieved by regulating the blade pitch angle during above-rated wind speeds in order to bypass excessive energy in the wind. Case studies demonstrate that the pitch angle control is carried out to achieve maximum power extraction during above-rated wind speeds and effectiveness of the proposed controller would be satisfactory.

재해영향 저감대책 수립기법

노경수,No, Gyeong-Su 한국수자원학회 2009 물과 미래(한국수자원학회지) Vol.42 No.11

한일 패키징 콘테스트 수상작에 관한 비교 분석

노경수,유왕진 한국포장학회 2008 한국포장학회지 Vol.14 No.2

Compared to the 2007 packaging contest winners’ work of Korea and Japan, their packaging trends have been studied in this study. Environmental-friendly packaging have been turned out the main trend at the same time in both Korea and Japan markets in this comparative research. In applied technology aspects, there was a remarkable distinction compared to packaging technology of both countries; Korea’s technology was evaluated out to be lagged behind Japan by three or four years in this study. The road map for future packaging development plan shall be suggested by following comparative studies from the annual packaging contests which are supposed to be held in many developed countries.