Louver control device of indirect cooling system and control method thereof

Abstract

The invention discloses a louver control device of an indirect cooling system and a control method thereof. The device comprises a steam turbine, a condenser, a circulating water pump, an air coolingtower, a PID regulator, a condensing water pump, a feedforward circuit, a first summator, a selector and a second summator. The feedforward circuit is connected to an input end of the selector throughthe first summator, an output end of the selector is connected to an input end of the second summator, an outlet temperature value of the air cooling tower is fed into an input end of the PID regulator, the output end of the PID regulator is connected to an input end of the second summator, and an output end of the second summator is connected to a temperature adjusting end of the air cooling tower. A water outlet of the air cooling tower communicates to a condenser inlet through a pipeline and a condenser outlet communicates to an inlet of the air cooling tower through the circulating waterpump and the pipeline. The louver control device has the advantages of being quick to respond to adjust a louver and accurate to adjust the louver.

Description

technical field [0001] The invention relates to the field of thermal power generation, and more specifically relates to a shutter control device and a control method for an intercooling system. Background technique [0002] The indirect air cooling system is to use air to indirectly cool the exhaust steam of the steam turbine through the intermediate circulating cooling water. The intercooling tower is an important equipment in the indirect air cooling system to realize the cooling of the intermediate circulating water. That is, the temperature of the circulating water rises after completing the cooling task of the exhaust steam of the steam turbine, and enters the heat exchange pipe network in the air cooling tower to realize its own cooling. The heat exchange pipe network in the air cooling tower is composed of several parallel cooling sectors, and each cooling sector changes the amount of air flowing through the heat exchange pipe network through the adjustment of the shu...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the adjustment means of the shutters in the prior art does not take into account the lag time of the influence of the load of the unit on the outlet temperature of the air cooling tower, the influence of the water temperature disturbance at the inlet of the intercooling tower, and the circulation The influence of water flow disturbance leads to slow adjustment response and inaccurate adjustment

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