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Primary frequency modulation capability calculation method and device, and storage medium

A calculation method and capability technology, applied in the field of primary frequency regulation capability calculation, can solve problems such as unable to provide strong support for stable operation of grid frequency, affecting unit primary frequency regulation capability, and insufficient primary frequency regulation capability, so as to avoid insufficient primary frequency regulation action capability and calculation The results are accurate and reliable, and the effect of timely adjustment of operating parameters

Active Publication Date: 2021-04-13
JIANGSU FRONTIER ELECTRIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the currently operating thermal power units, a certain number of units have insufficient primary frequency regulation capabilities, and cannot provide strong support for the stable operation of the grid frequency in time.
In addition, the actual valve flow of steam turbines in many power plants is very different from the original flow characteristic curve, which will affect the primary frequency regulation capability of the unit.
When the unit performs a frequency adjustment, there will be problems such as slow adjustment and inaccurate power compensation, which seriously affect the safety of the unit

Method used

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  • Primary frequency modulation capability calculation method and device, and storage medium
  • Primary frequency modulation capability calculation method and device, and storage medium
  • Primary frequency modulation capability calculation method and device, and storage medium

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Embodiment 1

[0054] Such as figure 1 As shown, the present invention provides a method for calculating primary frequency modulation capability, comprising the following steps:

[0055] Obtain real-time parameters of main steam and operating parameters of the unit from the DCS system of the thermal power unit;

[0056] According to the real-time parameters of the main steam and the operating parameters of the unit, determine the correction coefficient k in the calculation formula of the primary frequency regulation capacity b , using the particle swarm optimization algorithm to obtain the correction coefficient k b The optimal value;

[0057] Utilize the main steam real-time parameters, unit operating parameters and correction coefficient k b The primary frequency modulation capability N of the optimal value computer group pfm ;

[0058] Set the forecast limit value of primary frequency regulation capability;

[0059] Set the time interval and judge whether to continue the forecast or...

Embodiment 2

[0093] Embodiments of the present invention provide a primary frequency modulation capability calculation device, which includes the following modules:

[0094] Parameter acquisition module: used to obtain main steam real-time parameters and unit operating parameters from the thermal power unit DCS system;

[0095] Correction coefficient acquisition module: used to determine the correction coefficient k in the calculation formula of the primary frequency modulation capability b , using the particle swarm optimization algorithm to obtain the correction coefficient k b The optimal value;

[0096] Calculation module: used for real-time parameters of main steam, unit operating parameters and correction coefficient k b Calculating the optimal value once the frequency modulation capability N pfm ;

[0097] Predictive limit value setting module: used to set the predictive limit value of the primary frequency regulation capability, and the unit’s primary frequency regulation actio...

Embodiment 3

[0100] An embodiment of the present invention provides a primary frequency modulation capability computing device, including a processor and a storage medium;

[0101] The storage medium is used to store instructions;

[0102]The processor is configured to operate according to the instructions to execute the steps of the method in the first embodiment.

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Abstract

The invention discloses a primary frequency modulation capability calculation method and device, and a storage medium. The method comprises the following steps: obtaining main steam real-time parameters and unit operation parameters from a thermal power unit DCS system; determining a correction coefficient kb in a primary frequency modulation capability calculation formula according to the main steam real-time parameters and the unit operation parameters, and obtaining an optimal value of the correction coefficient kb by using a particle swarm optimization algorithm; calculating the primary frequency modulation capability Npfm of the unit by utilizing the main steam real-time parameter, the unit operation parameter and the correction factor kb optimal value; setting a prediction limit value of the primary frequency modulation capability; and setting a time interval, and judging whether to continue prediction or end prediction. The primary frequency modulation capability is calculated based on the basic principle of the steam turbine, the calculation result is accurate and reliable, the primary frequency modulation capability of the thermal power generating unit can be predicted in real time, and safe and stable operation of the unit is guaranteed.

Description

technical field [0001] The invention relates to a calculation method, device and storage medium for primary frequency modulation capability, and belongs to the technical field of thermal power generation control. Background technique [0002] The frequency of the power grid is one of the three major indicators of power quality and an important parameter to evaluate the stability of power system operation. Primary frequency regulation means that when the grid frequency deviates from the stable value, the speed control system of the steam turbine automatically adjusts the opening of the steam turbine control valve according to the change of the grid frequency, and adjusts the output of the equipment by adjusting the main steam flow, while the grid frequency is adjusted through thermal power The automatic regulation system of the unit steam turbine itself regulates the power. [0003] In recent years, the proportion of wind power and solar power generation in my country has be...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/241H02J2203/20
Inventor 殳建军崔晓波于国强高爱民张天海杨小龙胡尊民张卫庆史毅越
Owner JIANGSU FRONTIER ELECTRIC TECH
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