Building Constant Pressure Water Supply Case Study

As urban high-rise buildings continue to multiply, traditional water supply systems are increasingly challenged by large pressure fluctuations, high energy consumption, and accelerated equipment wear. AnyHz deployed an intelligent constant pressure water supply solution based on the FST-500 Series High-Performance Inverter for a commercial complex, achieving precise pipeline pressure control and significant system energy efficiency improvements.

This solution adopts a closed-loop control architecture of "Municipal Pipeline → Water Storage Tank → Variable Frequency Pump Group → Pressure Sensor → User Pipeline." The core control loop is structured as follows:

Core Equipment Configuration:

• Variable Frequency Drive: AnyHz FST-500 Series Inverter with SPWM vector control

• Pressure Detection: High-precision pressure sensor for real-time pipeline pressure acquisition

• Control Core: PID constant pressure controller for closed-loop pressure regulation

• Human-Machine Interface: HMI touch screen supporting real-time operation monitoring and parameter adjustment

• Safety Monitoring: Level sensor for real-time water storage tank status monitoring

The pressure sensor feeds pipeline pressure data back to the PID controller in real time. The FST-500 inverter automatically adjusts pump speed based on deviation signals, keeping pipeline pressure fluctuations strictly within ±0.02 MPa. Regardless of water consumption variations, users always enjoy a stable water pressure experience.

During low water consumption periods at night, the system intelligently enters a sleep energy-saving mode. When water demand is detected, it wakes up within 0.5 seconds, balancing energy efficiency with responsiveness. This function effectively reduces nighttime idling energy consumption and extends equipment service life.

The system supports multiple operating modes including 1 Main + 2 Standby and 1 Main + 3 Standby, featuring:

• Timed Rotation: Balances operating hours across all pumps to prevent excessive wear on any single unit

• Fault Switching: Automatically and seamlessly switches to standby pumps upon main pump failure, ensuring uninterrupted water supply

• Intelligent Dispatching: Automatically increases or decreases the number of operating pumps based on water load

Through the level sensor, the system intelligently detects the water source status in the storage tank. When the water level drops below the safety threshold, the system automatically shuts down to protect the pumps, completely eliminating the risk of dry-run damage.

The FST-500 inverter features built-in fault diagnosis and automatic restart functions. Combined with multi-pump redundancy design, standby pumps automatically take over when the main pump fails, ensuring 24/7 uninterrupted water supply.

• Precise Control: The FST-500 inverter delivers fast response and high-precision PID regulation for stable and reliable pressure control

• High Energy Efficiency: Variable frequency speed regulation replaces traditional valve throttling, dynamically adjusting to actual demand with a comprehensive power saving rate exceeding 30%

• Intelligent O&M: The HMI touch screen enables real-time monitoring of operating parameters, while fault warning and self-recovery functions reduce manual maintenance costs

• Safe & Reliable: Multiple protection mechanisms (dry-run protection, overvoltage protection, overload protection, etc.) comprehensively safeguard system operation

The AnyHz Building Constant Pressure Water Supply Solution, centered around the FST-500 Series Inverter and combined with PID closed-loop control and intelligent management, has successfully addressed the pain points of unstable water pressure, high energy consumption, and difficult maintenance in high-rise building water supply systems. This solution has been successfully deployed in multiple commercial complexes, residential communities, and hotels, providing a reliable benchmark for the intelligent upgrade of building water supply systems.

To learn more about AnyHz constant pressure water supply solutions, please visit www.anyhz.com or contact our technical team.