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Water supply control and stabilization method during rapid load reduction of generating units

A technology for generating sets and load reduction, applied in the field of control, can solve the problem of long time consumption for water supply control and stability

Active Publication Date: 2016-02-24
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention aims at the problem that it takes a long time to control and stabilize the water supply in the process of rapid load reduction of the generating set, and provides a method for controlling and stabilizing the water supply in the process of rapid load reducing of the generating set

Method used

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  • Water supply control and stabilization method during rapid load reduction of generating units
  • Water supply control and stabilization method during rapid load reduction of generating units
  • Water supply control and stabilization method during rapid load reduction of generating units

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Embodiment Construction

[0020] The following will describe in detail various embodiments of the feedwater control and stabilization method during the rapid load reduction process of the generating set according to the present invention.

[0021] Such as figure 1 As shown, it is a schematic flow chart of an embodiment of the water supply control and stabilization method in the process of rapid load reduction of the generating set of the present invention, including:

[0022] Step S101: Collect the main steam pressure, main steam temperature, reheat steam temperature, feed water temperature, feed water flow, and fuel flow corresponding to each time period from the occurrence of the rapid load shedding of the generator set to the restart process from the historical database;

[0023] The historical database is an integral part of the monitoring device for rapid load reduction of power plant units. The operating parameters of steam turbines, generators, boilers and other equipment and the parameters of ...

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Abstract

The invention provides a method for water feed stability control in the rapid load reducing process of a generator set. The method includes the steps that main steam pressure, main steam temperature, reheat steam temperature, water feed temperature, water feed flow and fuel flow corresponding to each time period from occurrence of rapid load reducing of the generator set to restart of the generator set are collected in a historical database; according to the relation between collected data and time, a time curve and a collected data curve are respectively established; fitting is conducted on the established curves, and then a fuel flow-water feed flow curve is obtained; according to the established curves and the fit curve, a water feed flow value corresponding to a boiler is determined when the main steam temperature, the reheat steam temperature and the main steam pressure are stable at the same time and the generator set runs in a house load operation condition; in the rapid load reducing process of the generator set, the water feed flow of a water feed pump is adjusted to be in the water feed flow value. According to the scheme, in the rapid load reducing process of the generator set, water feed stability is improved, and meanwhile stability control time is shortened.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a method for controlling and stabilizing water supply in the process of rapid load reduction of a generating set. Background technique [0002] Fast load shedding (FCB, FASTCUTBACK) means that when the unit is running higher than a certain load value, due to internal or external power grid faults and disconnected from the power grid, all external power supply loads are instantly shed, but no boiler MFT (MainFuelTrip, main In the case of burning trip), it is used to maintain the automatic control function of generator unloading with factory power or shutting down without stopping the furnace. [0003] At present, serious accidents of power grid failures and large-scale power outages have occurred one after another, causing huge losses in social life and economy. Electricity has penetrated into all aspects of social production and life. Once a partial or large-scale power failure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22D5/26F22B35/00
Inventor 黄卫剑潘凤萍陈世和万文军
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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