Inlet control system and control method of high-pressure regulating valve for steam turbine in thermal power plant
A high-pressure regulating valve and control system technology, which is applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as steam flow deviation, unit coordination control system normal operation, and unreasonable adjustment management curves, etc.
Inactive Publication Date: 2021-09-24
大唐阳城发电有限责任公司
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Problems solved by technology
In practical application, due to various reasons, the total steam flow will deviate before and after the switch of steam distribution mode, and this deviation will directly reflect the change of unit power and steam parameters, which will have a certain impact on the normal operation of the unit coordination control system
When the 600MW steam turbine is operated in the original sequence valve control mode, the original control curve of the control valve is unreasonable, the excessive overlap of the control valve has reached 20%, and the throttling loss is relatively large
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[0034] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. 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.
[0035] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a specific embodiment of the high-pressure regulating valve air intake control system provided by the present invention.
[0036] In a specific implementation, the air intake control system of the high-pressure regulating valve provided by the present invention is used in a steam turbine of a thermal power plant, wherein there are four high-pressure regulating valves, which are respectively the first regulating valve 101 and th...
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The invention provides a high-pressure regulating valve air intake control system of a steam turbine in a thermal power plant and a control method thereof. The control system selects the best time to open each high-pressure regulating valve and multiple The opening sequence of the two high-pressure regulating valves is such that during the working process, the first regulating valve and the third regulating valve are firstly opened synchronously, then the second regulating valve is opened, and finally the fourth regulating valve is opened, and each high-pressure regulating valve is optimally opened. The sequence is opened sequentially, thereby optimizing the steam distribution characteristic curve of the steam turbine, making the opening sequence of the high-pressure regulating valve of the steam turbine more reasonable, reducing the overlapping degree of the regulating valve, and reducing the throttling loss.
Description
technical field [0001] The invention relates to the technical field of turbine systems in thermal power plants, in particular to a high-pressure regulating valve intake control system for steam turbines in thermal power plants. The invention also relates to a control method based on the intake control system of the high-pressure regulating valve. Background technique [0002] At present, large-scale steam turbines adopt digital electro-hydraulic control system (DEH). After the switch of steam distribution mode is completed, the steam turbine will operate according to a completely different steam distribution characteristic curve. Although the openings of the various high-pressure regulating valves are different, the total steam flow through them is exactly the same. In practical application, due to various reasons, the total steam flow will deviate before and after the switch of the steam distribution mode. This deviation will directly reflect the change of unit power and s...
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IPC IPC(8): F01D17/14F01D17/04F01D21/00
CPCF01D17/04F01D17/145F01D21/003
Inventor 张国峰焦宏波张天胜周亚军南波范焕霞董永明王卫星乔永成张文龙
Owner 大唐阳城发电有限责任公司