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以往设计调压井稳定断面所用的托马(D.Thoma)公式是在理想调节假设下导出的,计算的调压井面积往往偏大,增加了工程投资,减缓了施工进度.本文考虑了影响稳定性的各种因素,建立了水电站实际调节系统的数学模型,导出一个较完整的调压井临界稳定断面公式,用此公式经合理地选定调速器参数计算结果,使水电站调压井在小于托马临界稳定断面下也能稳定运行,并指明托马等人的公式只是本文所提出公式的特例.文中还对引水式电站是否可以取消调压井给出简易判式.
In the past, the D.Thoma formula used to design a stable section of a surge shaft was derived under the assumption of ideal adjustment. The calculated area of the surge shaft tends to be large, which increases the project investment and slows the construction schedule. This article considers the influence The mathematical model of the actual regulation system of hydropower station is established and a more complete critical stability section formula of surge tank is derived. With this formula, the parameters of governor parameters are reasonably selected and the surge tank It is also a special case of the formula proposed in this paper that the stable operation is under less than the critical stability section of Toma, and the formula of Toma et al is also given.This paper also gives a simple judgment of whether the water diversion plant can cancel the surge tank.