Modeling and Experiment of 50kW Diesel Generator in Grid-connected Mode

Abstract

-This paper researches a modeling and experiment of 50kW diesel generator in grid-connected mode. The output of diesel generator can be calculated by the phase difference between voltage and current as well as the diesel generator parameter such as mutual impedance, field current and rotor angle. Considering the different d-q frame impedance, the output of diesel generator is analyzed for equation and verified by simulation. The diesel generator modeled by considering the time delay for actuator, diesel engine and exciter. The controller of diesel generator is divided into governor and exciter. The governor consists of speed controller and active power controller, where speed controller maintains frequency as 60Hz and active power tracks active power reference. On the other hand, the exciter consists of voltage controller and reactive power controller, where voltage controller controls 380VLL and reactive power is controlled as zero. When the active power reference is changed as 0.1pu in the grid connected mode, the active power takes 10 seconds to reach the steady state and the reactive power is maintains as zero. The 50kW diesel generator is tested and experiment results are well matched with the simulation results.

Analysis of Voltage Control of Stand-Alone Microgrid for High Quality Power Supply

“…일반적으로 도서지역에 전력을 공급하기 위해 디젤발전기를 이용한 자체적인 발전을 통해 전력을 생산하거나, 장거리 전송 선로를 설치하여 기존 전력망으로부터 수요지에서 요구 하는 전력을 공급하고 있다. 그러나, 디젤발전기의 낮은 효율성과 장거리 전송선로의 높은 설치비용은 도서지역 에 전력을 공급하는데 커다란 단점으로 부각되고 있다 [2]. 따라서, 이러한 단점을 보완할 수 있는 대안으로 독 립형 마이크로그리드를 이용한 전력공급 시스템의 연구 가 활발히 진행 중이다.…”