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Condensate throttling 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 and achieve the effect of efficient and safe utilization

Inactive Publication Date: 2017-08-04
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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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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  • Condensate throttling control system and safety control method thereof
  • Condensate throttling control system and safety control method thereof
  • Condensate throttling control system and safety control method thereof

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Embodiment Construction

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

[0052] figure 1 As shown, it is the structural diagram of the condensate throttling control system. By outputting the control signal, the opening of the deaerator upper water electric door can be adjusted to quickly adjust the condensate flow, and then change the extraction flow of low-pressure heaters at all levels, resulting in the load of the unit being increased. 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 adj...

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Abstract

The invention discloses a condensate throttling control system and a safety control method thereof, which belong to the technical field of thermal power unit control. The controller switching module of the condensate throttling control system is respectively connected to the power increment controller, the water level controller of the deaerator, the manual / automatic switching module for adjusting the water level of the deaerator, and the electric opening valve F on the water supply of the deaerator. ; Wherein, the throttling adjustment trigger signal of the controller switching module comes from the RS flip-flop. Based on the characteristics of system energy changes, the invention constructs the switch-on / off logic of the condensate throttling control system based on boiler energy signals and unit load change rate signals. By adjusting the opening of the water supply electric door of the deaerator and quickly adjusting the condensate flow rate, the unit load can be quickly adjusted; the unit load can be controlled stably; Fast, smooth controls.

Description

technical field [0001] The invention belongs to the field of thermal power unit control, and in particular 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 changing capability 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 load control of thermal power units in China 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 turbine side, the main steam parameters fluctuate durin...

Claims

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Application Information

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Patent Type & Authority Patents(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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