【摘要】：自20世紀80年代,汽輪機DEH即數(shù)字電液控制系統(tǒng)逐漸成為汽輪機主流控制系統(tǒng),并隨著技術(shù)日趨成熟,該系統(tǒng)開始應(yīng)用于小汽輪機。此次優(yōu)化的小汽輪機調(diào)速系統(tǒng)原是由WOODWARD505數(shù)字調(diào)速器及其輔助接口設(shè)備完成,后經(jīng)過十幾年運行,該調(diào)速系統(tǒng)存在于控制系統(tǒng)及油系統(tǒng)的問題缺陷越來越多,且維修成本非常高,影響汽動給水泵的正常運行。為此我廠對其進行優(yōu)化改造,并付諸實施。本論文以此次優(yōu)化改造為說明對象,分析原505數(shù)字調(diào)速器功能,我廠汽輪機運行情況,介紹最終通過系統(tǒng)優(yōu)化完全取消505調(diào)速器,將505所有功能移植在集散控制系統(tǒng)DCS中,使原有控制功能和診斷功能更加完善,改造后的小機控制系統(tǒng)簡稱MEH。該系統(tǒng)優(yōu)化改造后多年運行中穩(wěn)定可靠。本文為小汽機調(diào)速系統(tǒng)的優(yōu)化改造提供一個實例,也可為其他使用505調(diào)速器設(shè)備的控制系統(tǒng)升級提供一定參考。
[Abstract]:In the 1980 's, the DEH, digital electro-hydraulic control system of the steam turbine gradually became the main control system of the steam turbine, and as the technology became more and more mature, the system started to be applied to the small steam turbine. The optimized small turbine speed regulation system was completed by the WOODWARD505 digital speed regulator and its auxiliary interface equipment. After more than ten years of operation, the problem of the speed-regulating system in the control system and the oil system is more and more, and the maintenance cost is very high, affecting the normal operation of the steam-driven feed pump. To this end, we have optimized the project and put it into practice. The paper takes this optimization as an explanatory object, analyzes the function of the original 505 digital speed regulator and the operation condition of the steam turbine of our plant, and introduces the final elimination of the 505 speed regulator through the system optimization, and all the functions of 505 are transplanted in the DCS of the distributed control system. So that the original control function and the diagnosis function are more perfect, and the modified small machine control system is referred to as MEH. And the system is stable and reliable for a plurality of years after the system optimization is modified. This paper provides an example for the optimization and reconstruction of the small turbine speed regulation system, and can also provide some reference for other control system upgrades using 505 speed governor equipment.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM311;TP273

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本文編號：2505853