Frequency modulation auxiliary method and device for thermal power plant based on dual electric energy converter
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Solution Overview
Problem
Current frequency modulation methods in thermal power plants face challenges due to inconsistent wind speed caused by varying distances between the wind source and the boiler, affecting the speed of fuel combustion and overall power generation efficiency.
Innovation Solution
A frequency modulation auxiliary method and device utilizing a dual electric energy converter, which includes a frequency modulation auxiliary device connected to the boiler power generation system. This device operates under the control of a controller to adjust the frequency modulation based on real-time demands, ensuring optimal frequency modulation effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wind speed is adjusted directly for frequency modulation, then the response speed is fast, but the wind speed becomes inconsistent due to varying distances between wind source and boiler
Solution Approach 1:
The patent divides the single wind source into multiple wind sources (first wind source and second wind source), each positioned at different locations relative to the boiler. This segmentation allows independent control of wind speed for each source, ensuring consistent wind speed delivery to the boiler despite varying distances, while maintaining fast response capability through separate control mechanisms.
2Device complexity
If the distance between wind source and boiler is increased, then the system structure is simplified, but the wind speed consistency deteriorates
Solution Approach 1:
The patent applies local quality by positioning wind sources at specific locations optimized for their function. The first wind source is positioned for primary air supply while the second wind source is positioned for secondary air supply, with each location carefully selected to ensure optimal wind speed consistency for its specific role in the combustion process.
3Productivity
If fuel combustion speed is changed for frequency modulation, then the power generation output is adjusted, but the combustion stability is affected
Solution Approach 1:
The patent implements feedback control by continuously monitoring the combustion state and adjusting the wind speed from the first and second wind sources accordingly. When combustion intensity needs to be increased for higher power output, the system automatically increases wind speed while maintaining stability through coordinated control of multiple wind sources, preventing combustion fluctuations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution effectively improves the frequency modulation capability of thermal power plants, enhancing the stability and economy of the power system by ensuring consistent fuel combustion and power generation.
Implementation Method 1
controlling the frequency modulation auxiliary device to operate by the controller, so as to achieve corresponding frequency
Implementation Method 2
affects the actual speed of fuel combustion
Implementation Method 3
a right side of the frequency modulation box is connected with a blower through a first connecting pipe
Implementation Method 4
fuel heats water to generate steam when burning, which converts the chemical energy of fuel into heat energy
Implementation Method 5
Steam pressure drives the turbine to rotate, and heat energy is converted into mechanical energy
Implementation Method 6
the turbine drives the generator to rotate, which converts mechanical energy into electrical energy
Data Source
AI summary
A frequency modulation auxiliary method and device for thermal power plant based on dual electric energy converter are provided and relates to the technical field of frequency modulation in thermal power plants. The method includes: connecting a boiler power generation system of a thermal power plant with a frequency modulation auxiliary device; when frequency modulation is needed for the boiler power generation system, controlling the frequency modulation auxiliary device to operate by the controller, so as to achieve corresponding frequency; performing automatic adjustment on operation state and parameter setting of the frequency modulation auxiliary device according to real-time demand of a power system control center, so as to achieve optimal frequency modulation effect.