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한국조명·전기설비학회 조명·전기설비학회논문지 Journal of the Korean Institute of Illuminating and Electrical Installation Engineers Vol.23 No.7
발행연도
2009.7
수록면
67 - 74 (8page)

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This paper describes the speed control functions of the typical steam turbine speed controllers and the test results of generator load rejection simulations. The goal of the test is to verify the speed controller's ability to limit the steam turbine's peak speed within a predetermined level in the event of generator load loss. During normal operations, the balance between the driving force of the steam turbine and the braking force of the generator load is maintained and the speed of the turbine-generator is constant. Upon the generator's load loss, in other word, the load rejection, the turbine speed would rapidly increase up to the peak speed at a fast acceleration rate. It is required that the speed controller has the ability to limit the peak speed below the overspeed trip point, which is typically 110[%] of rated speed. If an actual load rejection occurs, a substantial amount of stresses will be applied to the turbine as well as other equipments. In order to avoid this unwanted situation, not an actual test but the other method is necessary. We are currently developing the turbine control system for another nuclear power plant and have plan to do the simulation suggested in this paper.

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Abstract
1. Introduction
2. Turbine and Generator
3. Turbine Speed Controller
4. Turbine Generator Simulator
5. Load Rejections Tests using Simulator
6. Conclusion
References
Biography

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