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Condensation water throttle control system and safety control method thereof

A condensate water throttling and control system technology, applied in control/regulation system, liquid level control, non-electric variable control, etc., can solve the problem of limited energy storage of deaerator

Inactive Publication Date: 2015-06-17
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited energy storage of the deaerator, the condensate throttling control can only play a temporary regulating role, and it is necessary to replenish water to the deaerator in time to ensure the safe operation of the unit

Method used

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  • Condensation water throttle control system and safety control method thereof
  • Condensation water throttle control system and safety control method thereof
  • Condensation water throttle control system and safety control method thereof

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Embodiment Construction

[0051] The present invention provides a condensate throttling control system and a safety control method thereof. First, the condensate adjustment rate range is determined, and the unit energy signal and the unit power change rate signal are constructed as the condensate throttling function switching signal. Perfect protection logic ensures fast and stable control of unit load.

[0052] figure 1 Shown is the structure diagram of the condensate throttling control system. By outputting the control signal, the opening of the deaerator's water electric valve is adjusted to quickly adjust the condensate flow, and then change the extraction flow of the low-pressure heaters at all levels, resulting in the unit load. Quick response.

[0053] The controller switching module T of the condensate throttling system is respectively connected to the power increment controller G, the deaerator water level controller O and the deaerator water level adjustment hand / automatic switch module Q; the de...

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Abstract

The invention discloses a condensation water throttle control system and a safety control method thereof, and belongs to the technical field of thermal power generating unit controlling. A controller switchover module of the condensation water throttle control system is connected with a power increment controller, a deaerator water level controller, a deaerator water level regulating hand / automatic switchover module and a deaerator water supply power-driven open degree valve F; a throttle regulating trigger signal of the controller switchover module is from an RS trigger. Based on characteristics of change of the system energy, a condensation water throttle control system logic of switching in / off is established based on a boiler energy signal and a unit load change rate signal. By regulating the open degree of a water supply electrically operated gate of a deaerator, the quick regulation of a unit load is achieved by regulating the condensation water flow quickly; the stable control of the unit load is guaranteed; the energy storage of a steam turbine is used sufficiently, and it is achieved that the power can be controlled quickly and stably in the variational load preliminary stage of a unit.

Description

Technical field [0001] The invention belongs to the field of thermal power unit control, and particularly relates to a condensate throttling control system and a safety control method thereof. Background technique [0002] In my country's energy structure, thermal power still occupies a dominant position, and gas, oil and hydropower stations that can quickly respond to fluctuating power sources such as wind power account for a small proportion. Therefore, in order to better accept new energy power and ensure the safe and stable operation of the power grid, improving the rapid load change capacity of thermal power units will be an inevitable choice for my country to accept new energy power on a large scale. [0003] At present, the domestic load control of thermal power units is mainly based on the coordinated control system of the boiler and the boiler. Due to the limitation of the characteristics of the boiler and the turbine side, during the rapid load change process, the main st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12
Inventor 曾德良胡勇刘吉臻牛玉广
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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