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锅炉汽鼓的给水自动调节系统,在电厂的生产中,已成为必不可少的控制系统了,并获得了广泛的应用。这类调节系统的组成也随着电厂设备容量的增大而逐趋完整。最初是采用单冲量给水系统,然后有双冲量给水系统,再则出现了较完整的三冲量给水调节系统。由于锅炉汽鼓水位对象特性的特殊性,这三冲量系统,并不能克服虚假水位对系统的影响作用。为此我们采用前馈单元加入到原来的三冲量系统中去,致使调节系统的调节品质获得改善,使调节系统也进一步完善。同时通过加入前馈单元的试验,初步摸索了用工程方法与定性分析的方法相结合的原则,对前馈的应用提出一些粗浅的看法,以便今后工作的参考。
Boiler drum water supply automatic regulation system, in the power plant production, has become an indispensable control system, and has been widely used. The composition of this type of regulation system is also becoming more and more complete as plant capacity increases. Initially the single impulse water supply system was used, then there was a double impulse water supply system, and then a more complete three impulse water supply adjustment system appeared. Due to the particularity of the object characteristics of boiler drum water level, the three-impulse system can not overcome the effect of false water level on the system. To this end, we use the feed-forward unit to join the original three-impulse system, resulting in regulation of the quality of the system to be improved, so that the adjustment system is also further improved. At the same time, through the experiment of adding feedforward unit, the principle of combining engineering method with qualitative analysis method is initially explored, and some superficial opinions on the application of feedforward are put forward for the reference of future work.