Application of the Xindashida AS800 High-Voltage Inverter and ASH80 High-Voltage Soft Starter in Water Pump Systems at Water Treatment Plants in the Water Industry
2025-06-05
Application of the Xindashida AS800 High-Voltage Inverter and ASH80 High-Voltage Soft Starter in Water Pump Systems at Water Treatment Plants in the Water Industry
Project Background
The Xindash AS800 high-voltage frequency converter and the ASH80 high-voltage soft starter have been successfully deployed at a water plant in Zhejiang Province, and the water supply system has smoothly passed acceptance testing.
The total investment in the water plant expansion project amounts to 169.0325 million yuan. The expansion will increase the plant’s daily water supply capacity to 50,000 tons and also equip it with emergency urban water supply capabilities. The construction scope includes the building of new pressure-stabilizing distribution wells, mixed coagulation and sedimentation tanks, clear-water reservoirs, and other related facilities. Upon completion, the project will optimize the city’s water resource allocation, meet regional industrial water demands, enhance the emergency water supply system, and improve the overall level of supporting facilities for water management operations.
Customer needs
According to the process requirements, the system must precisely control the number of pumps to be started and the speed of variable-frequency pumps. It should also perform rotating operations based on the cumulative operating time of each pump, giving priority to starting the pump with the shortest cumulative operating time to ensure that the cumulative operating times of all pumps remain roughly consistent. Meanwhile, the system strictly monitors the liquid level in the suction well: pumps are prohibited from being started when the liquid level falls below the pump top elevation; and pumps will be immediately stopped when the liquid level drops below the dry-pump protection water level, thereby ensuring the safe operation of the equipment.
In addition, the system must provide real-time dynamic visualizations of the process flow and power distribution system at the water pumping stations, support remote control of equipment, and allow flexible adjustment of setpoints and output values. The system features powerful data management capabilities, enabling it to establish a production database for storing raw production data and build a fault database. By leveraging the data stored in these databases, the system can perform statistical analysis and provide data-driven support for production decision-making.
In terms of operational monitoring, the system must continuously monitor the operating status of the water intake pump station. In the event of a malfunction, it should immediately trigger an alarm and visually display the alarm status on the process flow diagram. At the same time, the system provides interlocking functions among the internal control system devices as well as a fault status table, ensuring coordinated and safe operation of the equipment. Furthermore, the system can display trend curves for any parameter—both real-time and historical data—in real time or on demand. It also supports automatic scheduled or manually requested printing of various reports, thereby meeting the diverse needs of production management.
Xinshida Solution
Scheme advantages
● High-efficiency rectification technology: Employs multi-pulse rectification input technology, with harmonic content of the input current below 5%, significantly reducing harmonic pollution to the power grid.
● High power factor: The input-side power factor reaches as high as 0.96 (when the load exceeds 20%), effectively improving grid utilization efficiency and reducing energy consumption.
● Precise output control: Utilizing a multi-level PWM control method, the output waveform is nearly a perfect sine wave, significantly reducing motor torque ripple and enhancing operational smoothness.
● Low electromagnetic interference: The common-mode voltage and dv/dt values are extremely low, placing no special requirements on the motor or cables. No additional protective measures are needed, thereby reducing system complexity.
● High overall system efficiency: The system efficiency reaches over 96%, significantly reducing operating costs and enhancing energy utilization efficiency.
● Flexible control interface: Equipped with multi-function terminals, it supports custom and extended features without requiring an additional PLC, simplifying the system architecture.
● Reliability Assurance: Analog input disconnection protection ensures that the equipment remains operational even when the analog setpoint signal is interrupted, thereby guaranteeing continuous operation. The control system features a dual-power supply design, allowing it to continue operating normally even if the external control power supply fails, significantly enhancing system reliability.
● Powerful communication capabilities: The standard configuration supports Modbus communication, and optional configurations include a variety of mainstream communication protocols such as Profibus-DP and Profinet, enabling seamless integration with the plant’s entire control system for highly efficient operation.
Scheme Composition
Xinshida AS800 High-Voltage Inverter and ASH80 High-Voltage Soft Starter
Associated products
AS800 High-Voltage Frequency Converter
Project Results
● No additional equipment required: Customers do not need to install extra power factor correction devices or harmonic suppression devices on the power supply side, simplifying system configuration and reducing investment costs.
● Perfect Sine Wave Output: The device delivers a perfect sine wave, allowing even standard high-voltage motors to be easily retrofitted. This effectively extends the motor’s service life and reduces maintenance costs.
● Flexible control signals: Supports flexible adjustment of inverter control signals without the need to reprogram the PLC, greatly enhancing system flexibility and maintainability.
● Dual-power control: Supports dual-power control, significantly enhancing the reliability of the control power supply and ensuring stable equipment operation.
● Support for mainstream communication protocols: The inverter supports mainstream communication protocols, enabling customers to seamlessly integrate the inverter into the plant-wide control system and achieve efficient, centralized management.
The Xinshida frequency converter has achieved remarkable results in the water industry and has accumulated extensive practical experience. Its products have been widely adopted in large-scale projects involving numerous well-known domestic and international pump brands, and are extensively used in medium- and large-sized pumping stations both at home and abroad. Thanks to its outstanding technology and performance, the Xinshida frequency converter provides society with a variety of water-use solutions, effectively addressing people’s challenges in water access and making positive contributions to the efficient utilization and management of water resources.
