Method and system for coordinating header system boilers

Abstract

The invention discloses a method for coordinating header system boilers. The method is used for coordinating at least two boilers. The method comprises the steps that optimal original distribution coefficients corresponding to all the boilers are obtained based on resistance loss values of a steam turbine corresponding to the boilers, and the output power change value of the steam turbine is acquired in real time; the maximum distribution coefficient of each boiler is obtained based on the output power change value and the current load, the load upper limit value and the load lower limit value of each boiler; and a final distribution coefficient is obtained based on the maximum distribution coefficient and original distribution coefficient of each boiler, and the actual adjusting load capacity of each boiler is obtained through the output power change value and the final distribution coefficient of each boiler. According to the method, the original distribution coefficients of all the boilers are distributed conditionally based on the different resistance loss values of the different boilers in the initial distribution stage, the original distribution coefficients can be determined more accurately, and it can be guaranteed that pipe losses are the lowest. The invention further discloses a system for coordinating the header system boilers.

Description

technical field [0001] The invention relates to the technical field of thermal system control, and more specifically, relates to a method for coordinating boilers with parent tubes. In addition, the present invention also relates to a coordination system of a parent tube boiler. Background technique [0002] In the field of thermal system control at the present stage, boiler and steam turbine master control units are usually used to form. Under normal circumstances, one boiler is automatically controlled, while the other boilers are manually controlled. The reason is that when two or more boilers are put into automatic control at the same time, because the boiler outlet pipes are connected, multiple boilers that are put into automatic control are prone to vibration and mutual interference, which makes it impossible to put into automatic control at the same time. [0003] In order to solve this problem in the prior art, a coordinated control system is usually used to adjust...

AI Technical Summary

Problems solved by technology

The reason is that when two or more boilers are put into automatic control at the same time, since the outlet pipes of the boilers are connected, multiple boilers that are put into automatic control are prone to vibration and mutual interference, which makes it impossible to put into automatic control at the same time.

[0003] In order to solve this problem in the prior art, a coordinated control system is usually used to adjust all boilers synchronously. Although such a setting can solve the problem of oscillation, due to the characteristics of the boilers and the different arrays on the main pipe and the loss of the pipes, If the synchronous adjustment will lead to low overall efficiency, and some boiler outlet pressures will be super high or low.

Another method is that the system pre-sets a fixed boiler distribution coefficient. When the external load changes too much, or the boiler load is close to the maximum load or minimum load boundary after a period of operation, the distribution coefficient cannot match the current working condition. Unreasonable coefficient distribution will cause the load distributed by the boiler to be unable to be effectively and fully implemented

Neither of the above two situations can reduce the pipeline loss, which affects the overall efficiency of the unit

Images