상시 및 정전시에도 안정적인 운전이 가능한유도발전기의 운전방법
Operating Method of Induction Generator Capable of Stable Operation at All Times and Power Failure
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초록
A squirrel cage induction generator has been applied mainly to small-to medium-sized hydro power plants because of itssimple and rugged structure, low construction cost and easy maintenance. The induction machine can be used for both the motor andgenerator before and after the synchronous speed. The induction machine must receive reactive power continuously from the outsideto produce a rotating magnetic field. The reactive power is supplied mostly from the power supply side, but because the power factoris lowered when its amount is large, a capacitor is also attached to the load side terminal. In addition, the amount of reactive power ofthe capacitor installed to compensate for the power factor in the case of power failure is insufficient to generate the rotating field of theinduction machine. Therefore, additional reactive power must be supplied to supply power continuously to the load. This studyproposes a method to provide stable power to the customer by compensating for the insufficient reactive power by installing acapacitor in addition to the capacitor installed to compensate for the power factor when a generator operates the induction machine inthe case of power failure.
Abstract
A squirrel cage induction generator has been applied mainly to small-to medium-sized hydro power plants because of itssimple and rugged structure, low construction cost and easy maintenance. The induction machine can be used for both the motor andgenerator before and after the synchronous speed. The induction machine must receive reactive power continuously from the outsideto produce a rotating magnetic field. The reactive power is supplied mostly from the power supply side, but because the power factoris lowered when its amount is large, a capacitor is also attached to the load side terminal. In addition, the amount of reactive power ofthe capacitor installed to compensate for the power factor in the case of power failure is insufficient to generate the rotating field of theinduction machine. Therefore, additional reactive power must be supplied to supply power continuously to the load. This studyproposes a method to provide stable power to the customer by compensating for the insufficient reactive power by installing acapacitor in addition to the capacitor installed to compensate for the power factor when a generator operates the induction machine inthe case of power failure.
참고문헌 (8)
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- Charles I. Hubert, "Electric Machines : Theory, Operation, Application, Adjustment and Control" (2002), Prentice Hall
- 김종겸, "농형 유도 발전기의 소프트 기동 특성 해석", 전기학회논문지, 65(1), pp.103~107 (2016), 대한전기학회[DOI]
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