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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.
183MW 대용량 동기기 구동 LCI 시스템 기동운전 분석 및 시험
류호선(Hoseon Ryu),차한주(Hanju Cha) 대한전기학회 2013 전기학회논문지 Vol.62 No.5
Gas turbine systems are applied extensively in energy supplies to cover peak load requirements. The gas turboset must be accelerated by starting device up to 60%∼80% of rated speed to ignite the gas turbine. Recently, the most favorable and economical starting device is the LCI(Load Commutated Inverter). The LCI runs up the gas turboset by feeding the generator as a synchronous motor. In this paper, we discuss in detail the driving principles and features of 183MW gas turbine system. During field application of LCI system, many tests have been conducted and the results were described in this paper. The test results will be considered as the important resources for development in future.
류호선(Hoseon Ryu),차한주(Hanju Cha) 대한전기학회 2014 전기학회논문지 P Vol.63 No.3
Power conversion systems used in large gas turbine power plant can be divided into two main part. Because of the initial start-up characteristic of the gas turbine combustor, the gas turbine must be accelerated by starting device(LCI : Load Commutated Inverter) up to 10%∼20% of rated speed to ignite it. In addition, the ECS(Excitation Control system) is used to control the rotor field current and reactive power in grid-connected synchronous generator. These two large power conversion systems are located in the same space(container) because of coordination control. Recently, many manufactures develop high speed controller based on function block available in the LCI and ECS with the newest power semiconductor. We also developed high speed controller based on function block to be using these two system and it meets the international standard IEC61131 as using real-time OS(VxWorks) and ISaGRAF. In order to install easily these systems at power plant, main controller, special module and IO module are used with high speed communication line other than electric wire line. Before initial product is installed on the site, prototype is produced and tests are conducted for it. The performance results of Integrated controller and application program(SFC, ECS) were described in this paper. The test results will be considered as the important resources for the application in future.
500MW 동기발전기용 시뮬레이터 탑재형 디지털 삼중화 여자시스템 개발
류호선(Hoseon Ryu),차한주(Hanju Cha) 대한전기학회 2014 전기학회논문지 Vol.63 No.1
TMR(triple modular redundant) digital excitation system with simulator is developed for tuning optimal control parameters during commissioning test and coping with system faults rapidly. A new system which mocks up virtual generator, turbine, grid can simulate as if excitation system is connected to a real generator system by setting four switches. The maintenance crew using the simulator is able to test perfectly the phase controller rectifiers, field breaker, sequence relays as well as TMR controller of the excitation system. Commissioning and performance results about the excitation system with simulator is discussed. The trial product was installed and operated at a 500MW thermal power plant after the commissioning test.
류호선(Hoseon Ryu),문주영(jooyoung Moon),이의택(Uitaek Lee),이주현(Joohyun Lee),강윤모(Yunmo Kang),박만기(Manki Park) 대한전기학회 2017 전기학회논문지 P Vol.66 No.2
The gas turbine static starter rotates the stationary synchronous machine by the interaction of the rotor and the stator. The detection from the initial position of the rotor has been an important issue to drive with optimum torque. Previously, the gas turbine starter was used by attaching the encoder to the synchronous machine, but the position and velocity of the rotor have been estimated by sensor-less method until recently due to the difficulty in attaching and detaching and damage caused by the shaft voltage noise. In this paper, Rotor initial(stationary state) position estimation, forced commutation control(speed less than 10%), and natural commutation control(speed more than 10%) method using magnetic flux with integrated terminal voltage were presented and the sensor-less speed control performance was verified. As a result of making and evaluating the 29 kVA synchronous machine and the starting device, the performance of each control mode was satisfactory. Furthermore, the applied technology is expected to be used for the development of the gas turbine starter of tens of MW class and the field application.