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Load control system and method based on condensate throttling adjustment and prediction

A technology of condensate throttling and coordinated control system, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the interference of the coal feeding amount command, the power feedback value of the unit cannot correctly reflect the energy demand of the unit, Inability to reach adjustment potential, etc.

Inactive Publication Date: 2017-10-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the safety limit of the water level of the deaerator, the condensate throttling adjustment can only temporarily increase the power of the unit quickly, and the power command of the unit is finally completed by the original coordination control system
When the condensate throttling adjustment and the original coordinated control system of the unit work at the same time, the condensate throttling adjustment will cause the power feedback value of the unit to not correctly reflect the energy demand of the unit, interfere with the coal supply command, and cause the unit to fail during the load adjustment process. fluctuate in
[0005] (2) Similarly, since the condensate throttling adjustment and the original coordinated control system jointly affect the power of the unit, the condensate throttling adjustment load feedback loop is also affected by the coordination of the machine and furnace, resulting in the condensate throttling adjustment system. Misoperation, can not achieve the purpose of fully tapping its adjustment potential

Method used

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  • Load control system and method based on condensate throttling adjustment and prediction
  • Load control system and method based on condensate throttling adjustment and prediction
  • Load control system and method based on condensate throttling adjustment and prediction

Examples

Experimental program
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Effect test

Embodiment 1

[0051] figure 1 Shown is a load control system based on condensate throttling adjustment estimates,

[0052] In the deaerator water supply electric door control loop, a condensate throttling power increment control system based on the condensate throttling adjustment and estimation system is built. figure 1 Among them, the condensate throttling adjustment estimation system 1 is respectively connected to the unit object 6, the water supply electric door 5 of the deaerator, the condensate throttling power increment controller 4 and the difference calculator 8; the difference calculator 8 is connected to the original Coordinated control system 7 of machine and furnace; the coordinated control system 7 of original machine and furnace is connected with unit object 8, in which condensate throttling power increment controller 4 and power increment generation circuit 3 are connected to form condensate throttling power increment control system 2;

[0053] Among them, the unit power f...

Embodiment 2

[0079] This embodiment illustrates the load control method based on condensate throttling adjustment estimation. When throttling adjustment, the steps are:

[0080] Step 1: Initialize the unit power feedback value N e , Unit power setting value N e sp , Unit power increment estimate ΔN e , Unit power increment setting value ΔN e sp ;

[0081] Unit power initial feedback value = unit power when the system does not participate in throttling adjustment;

[0082] The initial set value of the unit power is: the unit power command issued by the grid dispatcher

[0083] The initial estimated value of unit power increment = 0;

[0084] Unit power increment initial setting value = 0;

[0085] Step 2: According to the condensate flow rate D wc , original unit power feedback value (original unit power N e ) and unit power setting value N e sp Calculation of condensate throttling adjustment power increment setting value ΔN e sp ;

[0086] Sub-step A1: Calculate the upper li...

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Abstract

The invention discloses a load control system and method based on condensed water throttling adjustment and estimation, which belong to the field of rapid variable load control of thermal power units. The system includes the original machine furnace coordination control system, the condensate throttling adjustment and prediction system, the condensate throttling power increment control system and the deaerator water supply electric door control circuit. The difference between the condensed water throttling adjustment power increment estimated value output by the condensate water throttling adjustment estimation system and the original unit power feedback value and the unit power command are used as the original unit boiler coordination control system. By changing the steam turbine valve opening The power of the unit is adjusted according to temperature, boiler fuel volume and feed water flow, and the interference of the throttling effect of condensed water on the coordinated control system of the boiler and boiler is eliminated, and the rapid and stable power control of the thermal power unit is realized.

Description

technical field [0001] The invention belongs to the field of rapid variable load control of thermal power units, in particular to a load control system and method based on condensed water throttling adjustment and estimation. Background technique [0002] Due to the characteristics of intermittent and strong random fluctuations of new energy power, the access of a large number of new energy power such as wind power and solar power will definitely have an impact on the power grid. Rapid load changing capability. After the promulgation of the two detailed rules of the North China regional power grid in 2009, the power grid company implemented economic rewards and punishments for the AGC performance assessment of the generator set. The AGC performance assessment requires the unit to have a faster adjustment rate, a small adjustment deviation and a short response time. [0003] The existing domestic thermal power unit rapid variable load control often causes problems such as fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 曾德良胡勇刘吉臻牛玉广
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)