Steam Turbine Power Control via Branch Pipe Valve Segmentation
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Solution Overview
Problem
The existing steam turbine power generation systems face challenges in quickly responding to power changes due to the large time constant associated with regulating steam generation, leading to inadequate follow-up performance when power compensation is required.
Innovation Solution
The introduction of a branch pipe control valve and a control unit that adjusts the opening degree of this valve, along with condensate and extraction pipe control valves, to regulate steam and condensate flow, allowing for precise control of steam supply to the turbines and improving power compensation responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the amount of steam generated by the reactor is regulated to control power, then the power of the generator can be adjusted, but the response time is slow due to large time constant
Solution Approach 1:
The patent segments the steam supply control into two independent parts: (1) reactor steam generation control and (2) main steam pipe control valve regulation. This allows the main steam pipe control valve to provide rapid response while the reactor control handles steady-state power adjustment, resolving the contradiction between power adjustment capability and response speed.
Solution Approach 2:
The main steam pipe control valve acts as an intermediary between the reactor and the turbine. It can quickly adjust steam flow to the turbine without requiring immediate changes in reactor power, thereby providing fast response to power demands while the reactor operates at stable power levels.
2Speed
If the main steam pipe control valve is used to regulate steam supply, then the response speed improves, but the system cannot properly compensate for power reduction requests
Solution Approach 1:
The patent implements a feedback control mechanism where the control unit continuously monitors generator power output and adjusts the main steam pipe control valve opening degree accordingly. When power reduction is detected, the system reduces valve opening to decrease steam flow, enabling proper power compensation while maintaining fast response through the valve's rapid adjustability.
Solution Approach 2:
The control system dynamically adjusts the main steam pipe control valve opening degree based on real-time power demands and generator output. This dynamic control enables the system to respond quickly to power changes and properly compensate for power reduction requests by modulating steam flow in real-time.
3Reliability
If the reactor operates at uniform power to prevent radioactive leakage, then safety is improved, but the system cannot adapt to varying power demands
Solution Approach 1:
The patent separates safety-critical reactor operation from power adjustment functions. The reactor maintains uniform power output to prevent radioactive leakage, while the main steam pipe control valve handles power demand variations. This segmentation preserves both safety and adaptability.
Solution Approach 2:
The main steam pipe control valve serves as an intermediary that decouples reactor operation from power demand fluctuations. It allows the reactor to operate safely at uniform power while still enabling the system to adapt to varying power demands through valve regulation.
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
This solution enhances the system's ability to quickly compensate for power reductions by controlling steam and condensate flow, thereby improving follow-up performance and increasing power generation efficiency.
Implementation Method 1
The main steam pipe control valve 16 regulates an amount of the steam supplied to the high-pressure turbine 17
Implementation Method 2
steam generated by the reactor is supplied to the high-pressure and low-pressure turbines through the main steam pipe and the turbines are rotated by the steam
Implementation Method 3
the low-pressure turbine 19 is connected to a generator 20
Implementation Method 4
The condenser 21 for condensing the steam discharged from the low-pressure turbine 19
Implementation Method 5
A low-pressure feed water heater 22, a feed water pump 23, and a high-pressure feed water heater 24 are installed downstream from the condenser 21
Data Source
AI summary
Disclosed herein is an apparatus for reactor power control of a steam turbine power generation system including a reactor, a high-pressure turbine to which steam is supplied from the reactor through a main steam pipe, a low-pressure turbine to which the steam discharged from the high-pressure turbine is supplied via a moisture separator reheater, a branch pipe branched from the main steam pipe to be connected to the moisture separator reheater, a generator connected to the low-pressure turbine, a condenser for condensing the steam discharged from the low-pressure turbine, a condensate pump for feeding condensate condensed by the condenser, and feed water heaters for heating the condensate, the apparatus including a branch pipe control valve provided on the branch pipe and a control unit for controlling an opening degree of the branch pipe control valve.