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2MW M/G 시스템을 이용한 가스터빈 10MW 정지형 기동장치 성능시험
류호선(Hoseon Ryu),이경규(Kyungkyu Lee),문주영(Jooyoung Moon),이주현(Joohyun Lee) 대한전기학회 2020 전기학회논문지 P Vol.69 No.1
The purpose of the static starting equipment(SSE) is to accelerate a synchronous machine up to a speed at which it can begin to run on its own. Because of its compressor, gas turbine must be run up to about 20∼30% of its rated speed before it is capable itself of producing enough power to continue accelerating the set. Recent korea researchers have developed the 10MW startup equipment based on the accumulated high power conversion technology. The 10MW startup equipment, which is scheduled to be applied to the B power plant, is equipped with the latest sensorless speed control technology. It was tested for checking performance before applying to the site. In this paper, the contents of the performance test were described. The performance test for 10MW startup equipment was carried out in two stages. The first stage of the test was performed without being linked with synchronous machine. The purpose of the test was to verify the developed hardware, basic control loop etc. In case of power conversion, the current control function was tested by shorting the converter. The two-stage test was carried out on a simulated environment using 2MW M/G system test facility. Basically, the test is for all function check of starting equipment. By estimated position and speed, It accelerated rotor until rated speed. Various performance evaluation results came out from the last tests before the field application. The performance of each control mode was satisfactory and the applied technology is expected to be well used for starting equipment.
계통 연계를 위한 NPC 3-레벨 인버터의 LCL 필터 설계
임상민(Sangmin Lim),정교선(Kyosun Jung),이경규(Kyungkyu Lee),최재호(Jaeho Choi) 대한전기학회 2014 대한전기학회 학술대회 논문집 Vol.2014 No.4
현재 계통 연계형 인버터에서 필터 크기를 줄이고 동적특성을 개선하며 필터의 성능향상을 하기 위해 LCL 필터의 사용이 증가하고 있으며 기존 PWM 인버터의 단점을 보완하기 위하여 NPC 3-레벨 인버터의 사용이 증가하고 있다. 본 논문에서는 계통 연계형 NPC-3레벨 인버터의 LCL 필터설계에 있어서 인버터 전류 리플의 최대치를 분석하고 각 인덕터간의 비율에 따른 필터효과, 출력전류 리플감쇄율을 고려하여 필터설계를 하고 있다. 이 설계를 통해 컴퓨터 시뮬레이션을 통하여 타당성을 검증한다.