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남수철,고백경,구본길,강성범,신정훈 대한전기학회 2020 전기학회논문지 Vol.69 No.11
The PMU can collect time synchronized and very accurate monitoring data. Recently, this technology has received a lot of attention to improve the stability of the power system. The PMU provides fast and accurate monitoring information to the operator, helping the operator to make the best choice. For this reason, many countries are adopting PMU technology. Korea has also attempted to introduce PMU technology, but the introduction has been delayed for various reasons. As the use of PMUs is delayed, concerns about operational difficulties due to renewable energy are increasing in the field. To solve these problems, KEPCO conducted research on expanding the introduction of PMU technology from 2017, and completed it in June 2020. Through the successful implementation of this research project and application to the field, KEPCO has played an important role in changing the negative perception of PMU by domestic engineers. This paper introduces the efforts of KEPCO and plans to expand the use of PMUs in Korea in the future
광역계통 전압/무효전력 관리를 위한 전압관리시스템의 개발 및 현장설치
남수철(Suchul Nam),신정훈(Jeonghoon Shin),백승묵(Seungmook Baek),이재걸(Jaegul Lee),문승필(Seungpil Moon),김태균(Taekyun Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.9
KEPCO proposes enhanced voltage management system that is a coordinate voltage control system between the hierarchical voltage control system and the slow voltage control system. It has been installing in Jeju island. VMS consists of a master controller, CVC (Continuous Voltage Controller) and DVC (Discrete Voltage Controller). CVC consists of main controller, FDMU (Field Data Measurement Unit) and several RPDs (Reactive Power Dispatcher). CVC has a control scheme with AVRs of generator to maintain the voltage of a pilot bus in a power system, DVC has a control scheme with static reactive power sources, like a shunt capacitor, a shunt reactor, ULTC and so on, to maintain the reactive power reserve of a power system and a master controller is executed to recover reactive power margin of a power system through coordinated control between CVC and DVC.
남수철(Suchul Nam),신정훈(Jeonghoon Shin),이재걸(Jaegul Lee),김태균(Taekyun Kim),박영신(Youngshin Park),백승묵(Seungmook Back) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문에서는 우리나라 계통에 설치된 345㎸ 변압기의 %Z 변경에 따른 계통영향을 분석하였다. %Z변경에 따른 고장전류 크기, 차단용량 초과 개소, 유/무효전력 손실변화, 변압기 과부하 개소, 부하공급 불평형 영향, 전압변동률, 전압안정도 해석 등의 정태해석과 함께 모선 사고 시 과도안정도 등의 동태해석을 수행하였다. 수행결과, %Z를 상향할 수 있는 량을 산정하였다.