• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.65.2-65
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• 2001

There are not only lots of controllers such as UMC(Unit Master Controller), BMC(Boiler Master Controller), Fuel Flow controller, Air flow controller, Feed water flow controller, S/H R/H Temperature controller and so on, but also compensation controller such as BTU compensator, Fuel/Water ratio controller and O2 Co controller to take automatic control in the super critical once through boiler. It is important to make complete automation of boiler to use the compensation controller like BTU compensator. For example, In case of some boiler condition, operator has to change combustion parameter for changing the coal, on the contrary BTU compensator can calculate set value of the fuel flow and reset the fuel flow demand by itself. This paper shows us the logic and instruction regarding compensation controller of boiler that can be operated automatically.

• Journal of Power Electronics
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• 제19권6호
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• pp.1544-1553
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• 2019

The efficiency of photovoltaic generation systems depends on the maximum power point tracking (MPPT) technique. Among the various schemes presented in the literature, the incremental conductance (INC) method is one of the most frequently used due to its superb tracking ability under changes in insolation and temperature. Generally, conventional INC algorithms implement a simple duty-cycle updating rule that is mainly found on the polarity of the peak-power evaluation function. However, this fails to maximize the performance in both steady-state and transient conditions. In order to overcome this limitation, a novel regulated INC (r-INC) method is proposed in this paper. Like the compensators in automatic control systems, this method applies a digital compensator to evaluate the INC function and improve the capability of power tracking. Precise modeling of a new MPPT system is also presented in the optimized design process. A 120W boost peak power tracker is utilized to obtain comparative test results and to confirm the superiority of the proposed method over existing techniques.

• 대한기계학회논문집B
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• 제38권2호
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• pp.155-163
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• 2014

주유소에서 거래되는 액체 연료인 석유류는 온도 변화에 따라 팽창과 수축하게 된다. 석유류의 체적팽창계수는 약 $0.1%/^{\circ}C$이고, 우리나라의 기온은 겨울철에는 $-15^{\circ}C$, 여름철에는 $35^{\circ}C$까지 변한다. 온도 변화에 따른 체적의 변화가 석유류 거래에 미치는 영향을 조사하기 위해 주유소에 저장된 연료와 주유되는 연료의 온도 변화를 측정하였다. 또 우리나라의 지난 50 년간의 일간, 월간, 년간 온도 변화를 고찰하였다. 지하 저장탱크의 유류 온도는 계절에 관계없이 하루 중 안정되게 유지되었다. 주유소 주위의 환경 조건과 위치, 주유 빈도등이 주유되는 유류의 온도에 영향을 미치는 것을 알 수 있었다. 이러한 연구 결과는 건전한 석유류의 거래와 관련 법령의 제정에 활용될 것이다.