A water filling valve position control system for auxiliary cooling water system of large thermal power unit
A technology of cooling water for auxiliary equipment and thermal power units, which is applied in the direction of liquid level control, non-electric variable control, control/regulation system, etc. It can solve the problems of liquid level switch misfired and cooling water inlet pressure drop too fast, etc., to achieve a solution The effect of liquid level development error sending and improving water filling work efficiency
Active Publication Date: 2018-05-25
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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[0006] Aiming at the deficiencies of the prior art, the present invention provides a water filling valve position control system for the cooling water system of the auxiliary equipment of the large-scale thermal power unit, which can solve the problem that the liquid level switch is mis-activated during the water filling process of the existing control system, and the cooling water inlet pressure drops too much. quick question
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0019] Such as figure 1 As shown, the embodiment of the present invention provides a water filling valve position control system for the auxiliary cooling water system of a large-scale thermal power unit. The second high report module M11, the third high report module M14, the first switch delay module M4, the second switch delay module M5, the high and low report module M8, the switch selection module M6, the analog delay module M9, Subtraction module M10, p...
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The invention provides a water filling valve position control system of a large-scale thermal power unit auxiliary machine cooling water system, which adopts a switch delay module, an analog delay module, and a module, a pulse module, and an RS trigger module in a distributed control system , subtraction module, high-value monitoring module, and switch value switching module to build a real-time online optimizer for water filling valve position control, which is intervened in the existing water filling control system of the auxiliary cooling water system to form an independent water filling valve position control The system solves the technical problems of the liquid level switch in the water filling process of the existing control system, the cooling water inlet pressure drops too fast, etc., and improves the water filling efficiency of the auxiliary cooling water system.
Description
technical field [0001] The invention relates to an automatic control system, in particular to a water filling valve position control system for a cooling water system of an auxiliary machine of a large thermal power unit. Background technique [0002] The purpose of the water filling control system is to fill each cooling sector with water according to the operation needs of the cooling system of the auxiliary machine. Each cooling sector integrates related cooling triangular elements and their corresponding water inlet pipes, water outlet pipes and drain pipes, which are arranged in parallel and work independently, so there are 4 identical water filling control systems for cooling sector water filling control. [0003] According to the control logic, the program closes the electric valve on the drain side and the overflow valve of the conveying pump, opens the electric valve on the water filling side of the conveying pump, starts one running conveying pump, closes the drain...
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IPC IPC(8): G05D9/12
Inventor 白东海邢津丁满堂张志刚倪子俊杜艳生周策贾峰生温武孙昌雯
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER