YT Electric Deploys High-Performance AHF and SVG Systems at Key Municipal Water Treatment Project in China

SHANGHAI, China – May 28, 2026 – YT Electric, a leading global provider of advanced power quality and energy management solutions, today announced the successful commissioning of its comprehensive power quality system at a landmark municipal wastewater treatment plant expansion project in East China. This project, which integrates state-of-the-art modular Active Harmonic Filters (AHF) and Static Var Generators (SVG), represents a major milestone in China's green urban infrastructure and eco-friendly water reclamation initiatives.

1. The Green Transition in China's Municipal Water Sector

As China aggressively pursues its "Double Carbon" goals (carbon peaking by 2030 and carbon neutrality by 2060), municipal infrastructure is undergoing a radical green transformation. Water reclamation and wastewater treatment are at the forefront of this movement. The municipal facility in East China is designed to process over 500,000 cubic meters of wastewater daily, transforming domestic and industrial effluents into clean, reusable water for agricultural and industrial irrigation.

However, modernizing these facilities requires highly automated processes that consume massive amounts of electrical energy. To achieve strict environmental discharge standards, the plant relies on a sophisticated network of electrical equipment. Unfortunately, the very technologies that enable high-efficiency water treatment also introduce severe electrical anomalies into the power distribution network, threatening the plant's operational continuity and overall energy efficiency.

2. The Power Quality Challenge in Modern Water Treatment Facilities

Wastewater treatment plants operate 24/7 in a highly continuous flow process. The plant’s electrical distribution system is dominated by non-linear loads. Hundreds of high-power submersible pumps, aeration centrifugal blowers, sludge dewatering centrifuges, UV sterilization systems, and chemical dosing pumps are driven by Variable Frequency Drives (VFDs). While VFDs are essential for optimizing water flow and saving motor energy, their internal rectifiers draw non-sinusoidal currents, generating massive amounts of high-order current harmonics—specifically the 5th, 7th, 11th, and 13th orders.

Without mitigation, these harmonic currents propagate through the plant's power transformers and distribution lines. This leads to serious power quality issues:

- Excessive Heat Generation: Harmonics cause high-frequency copper and iron losses in power transformers, causing them to overheat, degrade their insulation, and shorten their operational lifespan.

- Equipment Malfunction: Harmonic voltage distortion interferes with sensitive programmable logic controllers (PLCs), SCADA sensors, and automated water-quality monitoring instruments, causing unexpected process trips and erroneous data readings.

- High Reactive Power Demand: The massive inductive motors of aeration blowers draw significant reactive power, dropping the plant’s displacement power factor (PF) to a low 0.78. This results in heavy reactive power penalties from the local utility grid.

3. YT Electric's Integrated Technical Solution: System Architecture and Modular Precision

To resolve these interconnected power quality challenges, YT Electric's engineering department designed a centralized, multi-cabinet power quality compensation system. The solution seamlessly integrates modular Active Harmonic Filters (AHF) and Static Var Generators (SVG) in a parallel co-compensation architecture.

- Modular Static Var Generators (SVG): YT Electric deployed multiple modular SVG units. Unlike traditional capacitor banks that compensate in fixed steps, YT SVG utilizes high-speed insulated gate bipolar transistors (IGBTs) to generate continuously variable reactive current. It can shift between inductive and capacitive modes in less than 5 milliseconds, dynamically tracking the load fluctuations of large pumps and keeping the displacement power factor at a near-perfect 0.99.

- Active Harmonic Filters (AHF): To eliminate current harmonics, YT AHF modules utilize advanced fast Fourier transform (FFT) algorithms and digital signal processors (DSPs). The AHF continuously monitors the load current in real-time, detects the harmonic components, and instantly injects a compensating current of equal amplitude but opposite phase. This active cancellation targets up to the 51st harmonic order.

- Intelligent Load-Sharing and Hot-Swap Capability: The parallel modular architecture allows intelligent load-sharing among modules. If one module requires maintenance, it can be hot-swapped and serviced without shutting down the entire panel, ensuring zero downtime for the critical water treatment process.

4. Performance Evaluation: Real-World Commissioning Results

Following weeks of meticulous installation, integration, and onsite testing, YT Electric's engineering team successfully energized the system. The real-world performance data collected during commissioning demonstrated outstanding results:

- Harmonic Suppression: The Total Harmonic Current Distortion (THDi) at the plant’s main incoming breakers plummeted from a hazardous 28.5% to an exceptionally clean 2.8%.

- Power Factor Correction: The plant’s average power factor was elevated from a low 0.78 to a stable, optimal 0.99, completely eliminating utility reactive power penalties.

- Voltage Stability: Voltage sags and fluctuations caused by the starting of heavy aeration blower motors were reduced by 95%, stabilizing the internal 400V busbar.

This performance easily exceeds China's national power grid standard GB/T 14549 (Quality of Power Supply - Harmonics in Public Supply Network) and international electrical standards including IEEE 519 and IEC 61000.

5. Long-Term Economic and Environmental Impact

By optimizing the power quality of the wastewater treatment plant, YT Electric's solution delivers immediate economic and environmental dividends. The elimination of harmonic currents reduces unnecessary copper and iron losses in the power cables and transformers, resulting in an estimated 3.5% reduction in the facility's overall electricity consumption. For a plant processing 500,000 cubic meters of water daily, this translates to hundreds of thousands of kilowatt-hours saved annually, directly reducing the facility's carbon footprint.

Furthermore, stabilizing the grid voltage prevents unexpected shutdowns of the biological treatment and UV disinfection stages. This ensures that the water reclamation process remains continuous and stable, safeguarding the local river ecosystems where the reclaimed water is discharged.

6. Conclusion & Global Outlook

Municipal public utilities represent a vital sector where operational safety and energy efficiency must go hand in hand," stated the Projects Director at YT Electric. "The successful commissioning of our modular AHF and SVG systems in this landmark Chinese water reclamation facility proves that our technology is robust enough for the most demanding public utility grids. We are incredibly proud to play a key role in China's green urban development, and we look forward to exporting this successful blueprint to municipal infrastructure projects worldwide.

As cities globally strive to build smarter, greener infrastructure, YT Electric continues to lead the power quality industry with continuous innovation, manufacturing excellence, and tailored engineering services.

About YT Electric:

YT Electric is a premier global provider of Power Quality and Energy Storage solutions, specializing in modular Active Harmonic Filters (AHF), Static Var Generators (SVG), and Active Load Balancers designed to maximize grid efficiency and reliability.

Add: No.777, Sizhuan Road, Songjiang District, Shanghai, China.