Pumping Station Outflow Control for Energy and Liquid Level Stability
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Solution Overview
Problem
Conventional pumping station control methods rely on human experience and do not effectively consider energy-saving requirements under varying conditions, leading to inefficiencies and instability in energy consumption and liquid level management.
Innovation Solution
A control method and system that compare the inflow rate with the optimal flow rate for energy consumption, determining corresponding constraints to set a target outflow rate for constant flow rate control, using energy consumption models and machine learning to optimize pump operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the BEP method is used to control outflow rate at best efficiency point, then energy consumption is optimized, but liquid level stability deteriorates when inflow rate varies
Solution Approach 1:
The patent implements dynamic control by switching between BEP mode and liquid level priority mode based on real-time conditions. The controller dynamically adjusts the outflow rate target: using BEP flow rate when inflow is stable, and adjusting to prioritize liquid level control when inflow varies, thus resolving the contradiction between energy optimization and stability
Solution Approach 2:
The system changes the control parameter based on operating conditions. When inflow rate is stable, the control parameter is set to BEP flow rate for energy efficiency. When inflow rate varies, the parameter switches to liquid level-based control to maintain stability, effectively adapting to different operational states
2Use of energy by moving object
If outflow rate is constantly controlled at BEP flow rate, then energy consumption is reduced, but adaptability to varying inflow conditions deteriorates
Solution Approach 1:
The control system dynamically adapts between two operational modes: BEP mode for energy efficiency when conditions are stable, and liquid level priority mode when inflow varies. This dynamic switching enables the system to maintain both energy efficiency and adaptability to varying conditions
Solution Approach 2:
The control system performs multiple functions: it can operate in BEP mode for energy optimization, switch to liquid level control for stability, and handle transitional states. This multi-functionality allows the system to adapt to various operational requirements while maintaining energy efficiency
3Ease of operation
If manual control based on human experience is used, then operational flexibility is maintained, but energy-saving performance deteriorates
Solution Approach 1:
The control system automatically monitors inflow rate, determines the appropriate control mode (BEP or liquid level priority), and adjusts outflow rate without human intervention. This self-service capability maintains operational flexibility while achieving consistent energy-saving performance through automated decision-making
4Device complexity
If inflow rate is not considered in control strategy, then control simplicity is maintained, but liquid level stability deteriorates
Solution Approach 1:
The control system incorporates feedback by continuously monitoring inflow rate and using it to determine the appropriate control mode. This feedback mechanism ensures liquid level stability by adjusting control strategy based on actual inflow conditions while maintaining reasonable complexity through automated decision logic
Data Source
AI summary
A control method, a control system, and a non-transient computer-readable storage medium are provided. The control method is applicable to a pumping station comprising one or more pumps. The method may include: comparing an inflow rate of the pumping station with a flow rate for optimal energy consumption of the pumping station; determining, based on whether the inflow rate of the pumping station is greater than or equal to, or less than or equal to, the flow rate for optimal energy consumption of the pumping station, a corresponding constraint that indicates whether a target outflow rate of the pumping station is to be greater than or equal to, or less than or equal to, the flow rate for optimal energy consumption of the pumping station; and setting a target outflow rate that meets the constraint, for constant flow rate control of the pumping station.