AnyHz Completes 45-Unit VFD Energy-Saving Upgrade for Vietnam Water Supply Group

Ho Chi Minh City, Vietnam — August 2024 — Anyhertz Drive (Shenzhen) Co., Ltd. ("AnyHz"), a leading manufacturer of flux vector inverters, today announced the successful completion of a large-scale energy-saving retrofit for a major water supply group in Ho Chi Minh City, Vietnam. The project involved the deployment of 45 units of the FST-650L series variable frequency drives (VFDs) across the city's southern district water distribution network, replacing legacy valve-based flow control systems with intelligent variable-speed pump control.

Project Background

The client, one of Vietnam's largest municipal water supply operators, manages a distribution network serving approximately 1.2 million residents in Ho Chi Minh City's southern districts. Prior to the upgrade, the system's booster pump stations relied on traditional throttle valve regulation to manage flow rates during peak and off-peak demand periods. This method resulted in significant energy waste, pressure fluctuations, and accelerated mechanical wear on pump motors and pipeline infrastructure.

"Valve control is essentially fighting the pump's natural curve," said the project's lead engineer. "We were consuming full motor power even when demand dropped by half. The valves were doing nothing but creating artificial resistance and converting electricity into heat and noise."

Technical Solution

AnyHz's authorized Vietnam distributor, working closely with the client's engineering team, designed a turnkey solution based on the FST-650L general-purpose vector inverter. Key system features include:

• 45 × FST-650L-030G/037PT4 (30 kW) units installed across 9 booster pump stations
• Closed-loop constant-pressure control with remote pressure transducer feedback
• Multi-pump alternation logic to balance runtime across parallel pump sets
• Soft-start ramp profiles to eliminate water hammer and extend pipeline life
• RS-485 Modbus RTU communication integrated with the client's SCADA monitoring platform

The FST-650L's flux vector control algorithm enables precise torque response across the full speed range (1:100), ensuring stable pressure maintenance even during rapid demand transitions — a critical requirement for municipal water systems where pressure drops can affect service quality across entire neighborhoods.

Quantified Results

Performance data collected over the first 12 months of operation (March 2024–February 2025) demonstrated substantial improvements across all key metrics:

The 18-month investment payback period was validated by an independent energy audit conducted by the Vietnam Energy Conservation Center (VECC), confirming the project's eligibility for the country's industrial energy-efficiency incentive program.

Client Statement

"The difference in our daily operations is remarkable," said Nguyen Van Thanh, Chief Technical Officer of the water supply group. "Not only are we saving 35% on electricity bills, but our maintenance team now spends their time on preventive work instead of emergency repairs. The pressure stability has also eliminated customer complaints about low water pressure during evening peak hours. AnyHz's local technical team provided excellent commissioning support and operator training, which made the transition seamless."

About AnyHz Drive

Anyhertz Drive (Shenzhen) Co., Ltd. (AnyHz) is a national high-tech enterprise specializing in the research, development, and manufacturing of variable frequency drives and electrical transmission systems. Founded in 2005, the company holds independent intellectual property rights and is ISO9001 certified. AnyHz products are exported to over 100 countries, with established distribution and service networks across Southeast Asia, the Middle East, Russia, India, Africa, and South America.

The FST-650L series is a general-purpose flux vector inverter designed for pump, fan, and compressor applications, featuring advanced PID control, multi-pump alternation, and comprehensive protection functions. It is widely deployed in water treatment, HVAC, and industrial process control systems worldwide.

Media Contact

Sales Department
Anyhertz Drive (Shenzhen) Co., Ltd.
Email: sales@anyhz.com
Website: www.anyhz.com
Tel: +86-755-8350-0685