AGC control system and method based on heating-extracting flow change

A control system and extraction steam flow technology, which is applied to controllers with specific characteristics, electric controllers, steam applications, etc., can solve problems such as large fluctuations in AGC control performance indicators of units, and weakened steam work ability

Active Publication Date: 2017-05-31
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for the adjustment of the extraction steam turbine unit, since the unit is equipped with external heating and steam extraction in the high and medium pressure cylinders, the steam extracted from the unit only completes the work of the high pressure cylinder or the high and medium pressure cylinders, and does not participate in the work of the low pressure cylinder. , the work ability of this part of the steam is relativ

Method used

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  • AGC control system and method based on heating-extracting flow change
  • AGC control system and method based on heating-extracting flow change
  • AGC control system and method based on heating-extracting flow change

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Comparison scheme
Effect test

Embodiment 1

[0063] figure 1 It is a principle structure diagram of an AGC control system based on the variation of heat supply and steam extraction in the present invention.

[0064] Unit heating and extraction steam flow measuring device 1, which is used to measure the unit heating and extraction steam flow and transmit it to the processor;

[0065] the processor configured to:

[0066] The functional relationship F1(X) between the preset proportional coefficient and the heating and extraction steam flow of the unit; and the functional relationship F2(X) between the integral time parameter and the heating and extraction steam flow of the unit; according to the functional relationship F1(X) and F2 (X), dynamically calculate the proportional coefficient and the integral time parameter of the main control PID controller and send to the main control PID controller;

[0067] Unit load real-time measuring device 8, which is used to measure the unit load in real time and transmit it to the ma...

Embodiment 1

[0085] The control method of the AGC control system based on the change of the heating and extraction steam volume of the first embodiment specifically includes the following steps:

[0086] Step (1): The unit heat supply and extraction steam flow metering device transmits the measured unit heat supply and extraction steam flow to the processor;

[0087] Step (2): The functional relationship F1(X) between the preset proportional coefficient in the processor and the heating and extraction steam flow of the unit; and the functional relationship F2(X) between the integral time parameter and the heating and extraction steam flow of the unit; according to the function Relational formulas F1(X) and F2(X), dynamically calculate the proportional coefficient and integral time parameters of the main control PID controller and send them to the main control PID controller;

[0088] Step (3): The unit load real-time measurement device measures the unit load in real time and transmits it to...

Embodiment 2

[0096] figure 2 It is another schematic structure diagram of the AGC control system based on the variation of heating and extraction steam volume of the present invention.

[0097] A kind of AGC control system based on the variation of heat supply and steam extraction in this embodiment includes:

[0098] Unit heating and extraction steam flow measuring device 1, which is used to measure the unit heating and extraction steam flow and transmit it to the processor;

[0099] the processor configured to:

[0100] The functional relationship F1(X) between the preset proportional coefficient and the heating and extraction steam flow of the unit; and the functional relationship F2(X) between the integral time parameter and the heating and extraction steam flow of the unit;

[0101] According to the functional relationship F1(X) and F2(X), the proportional coefficient and integral time parameters of the main control PID controller are dynamically calculated;

[0102] The processor...

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Abstract

The invention discloses an AGC control system and method based on heating-extracting flow change. The system comprises a set heating-extracting flow metering device which is used for metering the set heating-extracting flow and transmitting the set heating-extracting flow to a processor. The processor is configured in that a function relation F1 (X) between a proportion coefficient and the set heating-extracting flow, and a function relation F2 (X) between an integral time parameter and the set heating-extracting flow are preset; according to the function relations F1 (X) and F2 (X), the proportion parameter and the integral time parameter of a master control PID controller are dynamically calculated and sent to the master control PID controller; a set load real-time measurement device timely measures a set load and uploads the set load to the master control PID controller; the master control PID controller is internally preset with a set load threshold; the master control PID controller is used for calculating a difference between the set load real-time measurement value and the preset set load threshold to obtain a set load deviation; and according to the set load deviation and the received proportion parameter and the integral time parameter, the dynamic adjustment of the set load is achieved.

Description

technical field [0001] The invention belongs to the field of generating set control, and in particular relates to an AGC control system and method based on the variation of heat supply and steam extraction volume. Background technique [0002] With the rapid construction of UHV smart grid and the rapid development of wind power, solar power, nuclear power and other new energy power generation, the grid structure is becoming more and more complex. The wind power output is weaker, the wind power output is more random, and the controllable frequency modulation compensation capability is worse. Therefore, for UHV receiving-end regional power grids that lack means of rapid load adjustment capabilities such as hydropower and gas-fired units, the pressure on safe and stable operation is also higher. bigger and bigger. How to effectively improve the level of automatic control of the power grid and ensure reliable power supply quality is an important issue that must be faced with th...

Claims

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Application Information

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IPC IPC(8): G05B11/42F01K17/02
CPCF01K17/02G05B11/42
Inventor 韩英昆庞向坤毕贞福孟祥荣李克雷高嵩周长来于庆彬林波
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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