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      • 계통연계 태양광발전시스템과 회전계자형 동기발전기의 병렬운전 특성

        류연수(Ryu Yeon-Soo),유왕진(Yoo Wang-Jin),이철규(Lee Checl-Gyu),문종범(Moon Jong-Beom) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-

        Through simulations and field experiment on A.C. parallel operation of both Utility Interactive Photovoltaic System and Diesel Engine Revolving Field Type Synchronous Generator, following factors have been found. First, the inverter should be operated in three modes of frequency(mode.1: ±0.3 ㎐ mode.2: ±l ㎐ mode.3: ±2 ㎐ as default, considering properties of operating Synchronous Generator. Second, as a result of supplying 13.5 ㎾ of residual power, it has been found that Synchronous Generator takes the power input only as reactive power, because it was electrically stable with frequency of 60.14㎐ and high voltage of 222.3V even when power factor was -0.94. Besides, it was mechanically stable, too, because the quake, noise, and temperature of Synchronous Generator in this case were 7.5 ㎜/s, 97 ㏈ and 6 ℃ respectively, which were lower than normal load connection of 145.6 ㎾ 11.03 ㎜/s. Thus, load share of Revolving Field Type Synchronous Generator reduces according to the supply of Photovoltaic System to the load power. In this experiment, 200㎾ of Synchronous Generator and 40 ㎾ of Photovoltaic System were operated in parallel. The load share was 20% in maximum, and 11.1lit/hr of fuel was saved.

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