The Pump Station Automation Control System is designed to enhance operational efficiency, safety, and reliability in wastewater and stormwater management. This system integrates an on-site automatic control system with a centralized monitoring and control room, enabling full automation of the pumping station’s operations. The on-site control system manages all equipment based on real-time conditions such as water level, while receiving data and control instructions from the central monitoring system of the sewage treatment project. This ensures that the pump station operates according to flow-based control requirements, optimizing performance and resource usage.
The system is structured in three hierarchical layers: the Information Layer, where the monitoring computer resides; the Control Layer, which includes PLCs and remote I/O stations; and the Equipment Layer, consisting of valves, pumps, flow meters, and level sensors. Each layer plays a critical role in ensuring seamless communication and control across the entire system.
The pump station operates in six distinct modes depending on seasonal conditions:
- **Mode 1**: During dry seasons or early rain, only the interception sewage pumps operate alternately or at full load.
- **Mode 2**: When intercepted water levels exceed thresholds, the interception pump runs at full capacity, and the rainwater regulation tank is activated.
- **Mode 3**: During continuous rainfall, when the rainwater tank is full, the interception pump operates at full capacity, and the rainwater pump initiates flood control.
- **Mode 4**: After the rain stops, the rainwater pump is turned off, and the regulation tank begins to vent, with only the interception pumps running alternately.
- **Mode 5**: In the rainy season without rain, the rainwater pump is tested, and the interception pump is temporarily stopped.
- **Mode 6**: During maintenance periods, the pumping station undergoes overhaul.
The system offers high reliability, cost-effectiveness, and comprehensive monitoring of all instrumentation and electromechanical equipment. It improves data collection, ensures safe operation, and reduces the workload of operators by implementing automated control processes.
To support this, the system features two independent control subsystems for the sewage and rainwater pump houses, each managed by a PLC. These systems are connected to a central control room equipped with two monitoring computers, one of which serves as a backup. Communication between the pumping station and the central monitoring station uses industrial Ethernet, with dual communication channels (DDN and wireless) for redundancy. The system also supports remote monitoring and control via CloudControl configuration software, providing a user-friendly interface for real-time data display, alarm management, and historical data analysis.
The software application includes real-time data monitoring, automatic report generation, and graphical displays of key parameters such as pump status, gate position, and grille condition. Data acquisition occurs at intervals of less than 100ms, with both switch and analog signals processed through remote I/O modules. Reports include daily, monthly, and annual summaries of operations, flow statistics, and fault alarms, enhancing transparency and decision-making.
In conclusion, this automation system provides a robust, efficient, and scalable solution for managing pumping stations. It ensures stable and reliable operation, reduces labor intensity, and enhances overall system performance. With its advanced man-machine interface and powerful data management capabilities, it delivers an ideal information technology solution for modern pumping station automation.
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