Intone Power Successfully Energizes Advanced Power Quality Solutions for Municipal Water Reclamation Plant in East China
SHANGHAI, China – May 28, 2026 – Intone Power, a premier innovator in industrial power electronics and grid stabilization solutions, today announced the successful energization of its state-of-the-art power quality correction systems at a massive municipal water reclamation facility in East China. The deployment of Intone Power's advanced Active Power Filters (APF/AHF) and Static Var Generators (Svg) marks a critical development in China’s ongoing drive to integrate high-efficiency automation into its public utility sectors.
- A Milestone in East China's Eco-Infrastructure
The rapid urban expansion of China’s coastal economic zones has placed immense pressure on local water resources. In response, municipal authorities in East China launched a state-of-the-art water reclamation facility designed to recycle domestic wastewater into high-purity industrial-grade water. This project relies on cutting-edge automated processes, bio-membrane filtration, and high-pressure chemical delivery systems.
To ensure these highly sophisticated biological and chemical processes operate without interruption, the facility’s engineering teams chose automated controls and variable speed motors. However, the complex Power Electronics embedded within these modern systems pose a significant threat to the plant's own power distribution network. The resultant grid pollution can trigger system failures, presenting a massive obstacle to the facility's mission of continuous, resource-efficient operation.
- Understanding the Electrical Vulnerability of Water Treatment Automation
A water reclamation plant is a classic example of an integrated, highly automated industrial environment. The continuous treatment process relies heavily on massive motorized equipment:
- Aeration Blowers: Large centrifugal blowers supply oxygen to the biological treatment tanks, drawing enormous amounts of inductive reactive power.
- High-Lift Pumps: Submersible and high-pressure pumps transport water through membrane filters, controlled by high-power Variable Frequency Drives (VFDs).
- Sludge Dewatering & Disinfection: High-speed centrifuges and ozone generators introduce high-frequency electrical noise and harmonic current distortion into the system.
From an electrical perspective, VFDs are non-linear loads. The AC-to-DC conversion process within these drives generates severe harmonic currents, primarily the 5th and 7th orders, which deform the pure sinusoidal voltage waveform of the electrical grid. This voltage distortion creates severe electromagnetic interference (EMI), leading to PLC controller synchronization failures, false sensor alarms, and random tripping of circuit breakers. Additionally, the continuous reactive power deficit lowers the plant’s displacement power factor (PF) to 0.78, incurring significant financial penalties from China's national power grid.
- Intone Power's Proprietary Compensation Technology: DSP Control & 3-Level Topology
To combat these severe electrical disturbances, Intone Power’s engineering division customized a centralized, active power quality compensation solution. The system consists of multiple heavy-duty APF and SVG cabinets, utilizing the company's proprietary 3-level topology and advanced digital signal processing (DSP) architecture.
- High-Speed Active Power Filters (APF/AHF): Intone Power’s APF modules leverage the latest generation of DSP combined with Field Programmable Gate Arrays (FPGA). This dual-core control engine calculates the precise harmonic current of the grid at an industry-leading speed. The system controls high-frequency IGBTs to inject an exact neutralizing current with a reaction time of under 100 microseconds, actively suppressing current harmonics up to the 51st order with a correction efficiency exceeding 97%.
- Dynamic Static Var Generators (SVG): Operating alongside the APF, Intone Power’s SVG units provide dynamic, step-less reactive power compensation. By generating instantaneous capacitive or inductive currents, the SVG maintains the facility's power factor at a stable 0.99, completely protecting the grid from voltage fluctuations during heavy motor starting sequences.
- 3-Level Inverter Topology: Compared to traditional 2-level inverters, Intone Power's 3-level circuit design significantly reduces the voltage stress on IGBTs, cuts switching losses by 20%, and lowers output current ripple, delivering unparalleled electrical reliability and efficiency.
- Severe Environment Engineering: Ensuring Thermal and Physical Integrity
Wastewater treatment plants present a highly hostile environment for sensitive power electronics. The presence of high humidity, ambient heat, and corrosive chemical gases (such as hydrogen sulfide and chlorine) can quickly damage standard electrical components.
To guarantee a minimum 10-year operational life, Intone Power engineered specific physical protections for the deployed systems:
- Isolated Cooling Air-Ducts: The cabinets utilize an innovative independent cooling path design. All heat-generating power components (such as reactors and IGBT heatsinks) are placed in a rear wind-channel, while the highly sensitive control boards and DSP electronics are sealed in a front, dust-proof chamber. This prevent corrosive ambient air from coming into contact with sensitive electronic components.
- Anti-Corrosion Coating: All internal copper busbars are nickel-plated, and printed circuit boards (PCBs) are treated with military-grade conformal coatings to resist moisture, salt-spray, and chemical corrosion.
- Onsite Commissioning & Verified Power Grid Stabilization
Following intensive onsite grid integration and full-load validation, the power quality system was officially energized. The performance metrics recorded by advanced grid analyzers demonstrated the immense efficacy of Intone Power's technology:
- Harmonic Minimization: The Total Harmonic Current Distortion (THDi) was dramatically reduced from 29.2% to an extremely safe 2.7%, stabilizing the internal 400V bus.
- Power Factor Elevation: The plant's displacement power factor was successfully elevated from 0.78 to a near-perfect 0.99, eliminating all reactive power surcharges.
- Thermal Reduction: Operating temperatures of the main power distribution transformers dropped by an average of 8°C, drastically reducing the rate of transformer insulation aging.
These results ensure complete compliance with China's strict national power quality standards (GB/T 14549) and international standards (IEEE 519 and IEC 61000).
- Empowering the Future of Green Utilities
"Critical public infrastructure leaves no room for operational failure or electrical inefficiencies," stated the Technical Director at Intone Power. "By integrating our advanced APF and SVG systems, we have successfully optimized the plant’s power network, drastically reducing energy losses and eliminating harmonic interference. This milestone project reinforces Intone Power’s dedication to providing high-reliability power electronics for crucial eco-infrastructure."
As China accelerates its transition toward green manufacturing and smart grid technologies, Intone Power remains at the forefront of the industry, delivering robust, high-performance power quality solutions that empower global enterprises to achieve a sustainable future.
About Intone Power:
Intone Power is a leading provider of Power Quality and Energy Storage solutions, specializing in Active Power Filters (APF/AHF), Static Var Generators (SVG), and modular Battery Energy Storage Systems (BESS) designed to optimize electrical networks for a sustainable future.
Add: No.777, Sizhuan Road, Songjiang District, Shanghai, China.