Nuclear Heat Supply Control with Turbine Pressure Feedback
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Solution Overview
Problem
The manual regulation of steam extraction amount in nuclear power plant heat supply systems leads to increased operational burden, human error, and potential safety risks due to the need for synchronized monitoring and adjustment of multiple parameters, and the shift in reactor-turbine coordination curves during steam extraction heating, affecting power generation efficiency and stability.
Innovation Solution
A control system and method that includes first-stage pressure, high-exhaust pressure, and steam extraction heating flow rate measurements, with a data acquisition module and core operation processing module to generate action instructions for valves and determine turbine load values, optimizing automation and reducing human error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation is used to regulate steam extraction amount, then operational flexibility is maintained, but operational burden increases and human error probability increases
Solution Approach 1:
The control system enables automatic self-regulation of steam extraction amount by using the measured first-stage pressure signal to automatically determine turbine load and generate valve control instructions, eliminating the need for manual monitoring and adjustment of multiple parameters, thereby reducing operational burden and human error
Solution Approach 2:
The patent replaces manual mechanical operation with an automated control system that uses electronic sensors to measure first-stage pressure, processes signals through a control module, and automatically adjusts valve positions, substituting human operators with an automated control mechanism
2Productivity
If manual regulation of steam extraction amount is performed, then system complexity is reduced, but system response time increases and power generation efficiency is lost
Solution Approach 1:
The control system continuously measures the first-stage pressure signal, processes it to determine current turbine load, compares it with the action instruction turbine load, and automatically adjusts steam extraction valve positions in real-time, creating a closed-loop feedback system that rapidly responds to load changes and maintains optimal power generation efficiency
Solution Approach 2:
The control module pre-calculates the action instruction turbine load based on the measured first-stage pressure signal before actual load changes occur, allowing the system to proactively adjust steam extraction settings and maintain optimal operation, thereby preventing power generation efficiency loss
3Reliability
If steam extraction heating is put into operation with original pure condensation operation condition curve, then device complexity is minimized, but load matching error increases and reactor system stability is affected
Solution Approach 1:
The control system dynamically adapts the turbine load determination based on the measured first-stage pressure signal and current steam extraction conditions, automatically adjusting the relationship between pressure and load to match current operational mode, thereby maintaining reactor-turbine coordination stability without requiring complex manual curve selection
Solution Approach 2:
The patent changes the operational parameters by introducing a new control approach that uses first-stage pressure as the primary measurement parameter to determine turbine load, replacing the original pure condensation operation condition curve with an adapted control strategy that accounts for steam extraction heating conditions, thereby maintaining system stability
Data Source
AI summary
Provided in the present disclosure is a control system for a heat supply apparatus of a nuclear power plant, comprising: a first-stage pressure measurement means configured for measuring a first-stage pressure of a turbine to obtain a first-stage pressure signal; a high-exhaust pressure measurement means configured for measuring an exhaust pressure of a turbine high-pressure cylinder to obtain an exhaust pressure signal; a steam extraction heating flow rate measurement means configured for measuring a steam extraction heating flow rate to obtain a steam extraction heating flow rate signal; a data acquisition module configured for acquiring and transmitting the measured first-stage pressure signal, the measured exhaust pressure signal and the measured steam extraction heating flow rate signal to a core operation processing module; the core operation processing module; and a the signal output module.