OPTIMIZATION OF TRANSIEN PROCESSES OF WATER LEVEL VARIATION IN DRUM OF STEAM BOILERS
Abstract
The work of regulator in general three-impulse automatic control system of water level in drum of boiler doesn’t supply quality of internal and external disturbance attack (presentation of regulation mistakes). That is why it is needed to improve. Different methods of proportional plus reset controller regulation of three-phase automatic feed control system are considered. There were suggested new methods to improve the quality of regulation of water level in boilers. Here the step system of automatic regulation was determined, on the base of transfer function.
It is noticed that optimal transient processes supply calculation of numerical value of transmission factor of regulator at g =2,618, it is more then was recommended, but statistic mistakes remain. The transient simulation method in fast-time scale is recommended, this allow to determine early the value of statistic mistake of regulation by disturbances of reheated steam consumption and properly change the task to compensating device of step automatic control system. And numerical value of time constant criteria should be calculated on the base of numbers of golden section(Phi), taking into account the definite time constant of lead section and time-lag, time-lag on controlled influence channel, and also taking into account maximum value of controlled influence. This method allow to reduce in two times the total time of regulation, to decrease absolute mistake of regulation in three times, and maximum value of regulation influence by feedwater in 1,7 times.
About the Authors
G. T. Kulakov
Belarusian National Technical University
Belarus
Belarus
Professor, PhD in Engineering
A. N. Kuharenko
Institute of Command Engineers of the Ministry for Emergency Situations of the Republic of Belarus (ICE)
Belarus
Graduate student
Belarus
Graduate student
References
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Review
For citations:
Kulakov G.T., Kuharenko A.N. OPTIMIZATION OF TRANSIEN PROCESSES OF WATER LEVEL VARIATION IN DRUM OF STEAM BOILERS. ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations. 2014;(4):63-74. (In Russ.)
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