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Power Capacitors
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BY91 Series Micro-Power Active Harmonic Filter for Power Factor Correction with Active Power Filter APF 690V
Model Meaning
The Parameters of APF
| Model | BY91-APF-150-690/4L |
| Rated working voltage | 690V |
| Rated working current | 150A |
| Total harmonic compensation rate | >85% |
| Power input frequency | 50Hz |
| Input voltage unbalance level | <5% |
| Impulse withstand voltage | / |
| Power loss | <5% |
| Response time | <40ms |
| Noise level | <65dB |
| Installation place | Indoor |
| Enclosure protection degree | IP20 |
| Meet the standards | JB/T 11067-2011 |
Production Introduction
BY91-APF active power filter (APF) is a new type of power electronic device used to dynamically suppress harmonics and compensate reactive power. It detects the load current with sampling circuit, extracts the harmonic component in the load current through internal DSP calculation, and drives IGBT, The control inverter generates a harmonic current which is equal to the harmonic current of the load and in the opposite direction and injects into the power grid to achieve the purpose of filtering. According to the same principle, APF can also compensate the negative sequence current component of asymmetric three-phase circuit, to realize the three-phase unbalance compensation and reactive power compensation.
- Comprehensive functions: intelligent harmonic filtering, dynamic reactive power compensation and three-phase load balancing can be realized at the same time
- Excellent performance: with nearly perfect harmonic filtering effect and continuous dynamic reactive power compensation, the power factor is increased to more than 0.95 to ensure load balance.
- Advanced technology: continuous, dynamic tracking compensation, 40us response to load change, 10ms compensation. The filtering performance is not affected by the system impedance. The harmonic compensation characteristics are not affected by the frequency change of the power grid, and the compensation ability is not limited by the grid voltage.
The principle of active power filter
An Active Power Filter (APF) consists of a storage DC power supply formed by a DC reactor or capacitor. The energy stored in the reactor or capacitor is converted into an AC current with the required frequency and waveform through an inverter, and then injected into the power supply line via a transformer. The pulse-width modulation (PWM) inverter also has the function of supplying electrical energy to the DC reactor or capacitor, and this process is directly controlled by its control circuit. An Active Power Filter is composed of two major parts, namely the command current operation circuit and the compensation current generation circuit (which consists of a current tracking control circuit, a drive circuit, and a main circuit). The basic working principle of an Active Power Filter is as follows: By detecting the voltage and current of the object, the command signal of the compensation current is calculated through the command current operation circuit. This signal passes through the compensation amplification circuit to obtain the compensation current. The compensation current cancels out the harmonics and reactive currents to be compensated in the load current, ultimately compensating for the expected power supply current.
The function of active power filters
Filter out current harmonics
- It can efficiently filter out various harmonics from the 2nd to the 25th order in the load current, thus making the distribution network clean and efficient and meeting the requirements of national standards for distribution network harmonics. This product truly achieves adaptive tracking compensation. It can automatically identify changes in the overall load and the harmonic content of the load and quickly track and compensate. It responds to load changes within 80 μs and achieves complete tracking compensation within 20 ms.
Improve system imbalance
- It can completely eliminate system imbalance caused by harmonics. When the equipment capacity permits, it can compensate for the system fundamental negative-sequence and zero-sequence unbalanced components according to user settings and moderately compensate for reactive power. On the basis of ensuring the harmonic filtering function, it effectively improves the system imbalance.
Suppress power grid resonance
- Suppress power grid resonance. It will not resonate with the power grid, and within its capacity range, it can also effectively suppress the resonance of the power grid itself. This is something that passive filter devices cannot achieve.
Multiple protection functions
- It has multiple protection functions such as overcurrent, overvoltage, undervoltage, excessive temperature, measurement circuit fault, and lightning strike to ensure the safe operation of the device and the power system. It can also automatically exit operation when the load is light, fully considering operational economy.
With the progress of power electronics technology and control technology, Chinese active filters have achieved remarkable results in various major projects. At present, active filters have been applied in improving power quality, solving problems such as terminal voltage regulation in three-phase power systems, voltage fluctuation suppression, voltage balance improvement, harmonic elimination, and reactive power compensation.
Wiring method
The LOAD terminal is linked to the load. Specifically, N is attached to the neutral wire, while L is connected to the live wire. The three E’s on the right are earthed, with N linked to the neutral wire and L connected to the live wire. This represents the power supply end. The wiring configuration is as follows: Input L is connected to terminal 1, N is connected to terminal 2; Output L’ is connected to terminal 3, N’ is connected to terminal 4; the ground wire is properly grounded.
Product Dimension Information of BY91 - APF
| Model | W | L | H |
| BY91-APF-150-690/4L | 580mm | 630mm | 200mm |
Why choose Baoyu?
Dynamic harmonic compensation is achieved through an active power filter (APF), which can fully compensate for harmonics from 2 to 51. Users can freely set the compensation rate according to their own needs to ensure that the power quality of the system is effectively improved. This flexibility enables APF to adapt to different application scenarios and meet the harmonic suppression requirements under various load conditions, thereby optimizing the operating efficiency and stability of the power system.
Active filters use advanced intelligent Fourier transform technology, which can analyze and process power signals in real time with its excellent high precision and ultra-fast computing speed. The application of this technology ensures that users can obtain continuous and stable power supply while maximizing the ideal energy efficiency level. Through the optimization of intelligent algorithms, active filters not only improve the quality of power, but also effectively reduce harmonic interference, improve the overall performance and reliability of the system, and provide users with a more efficient and environmentally friendly power solution.
Independent Air Duct Design:The independent air duct design adopts a circuit sealing mechanism, ensuring good heat dissipation performance and equipment safety. This structure not only facilitates installation and maintenance but also makes it easy to replace components, improving the reliability and ease of use of the system. The independent air duct design effectively prevents the intrusion of dust and impurities, extending the service life of the equipment and making it suitable for various industrial applications.
Application scenarios
Signal base station semiconductor industry power grid
Storage Workshop
Production workshop
Workshop Vedio
Baoyu Holding Co., Ltd. is a globally leading provider of intelligent power quality solutions. Focusing on the research and development and production of Active Power Filters (APF), intelligent capacitors, reactors, and reactive power compensation devices, its products are widely applied in fields such as industrial manufacturing, new energy power generation, data centers, and commercial buildings. With technological innovation at its core, through intelligent manufacturing workshops and digital warehousing systems, the company provides highly reliable and low-carbon power optimization solutions to over 30 countries and regions worldwide, covering markets in Europe, the Americas, Southeast Asia, and the Middle East.
Our Intelligent Manufacturing Workshop: Precision Manufacturing for Quality Assurance
Baoyu's manufacturing workshop adheres to the Industrial 4.0 standards, integrating automation, digitalization, and green manufacturing:
• Fully Automated Production Lines: Integrating SMT assembly process, robotic welding, and AI vision inspection technology, the key component accuracy reaches ±0.1mm, and product consistency is ≥99.98%.
• Rigorous Testing System: Products undergo 72-hour high and low-temperature cycle tests (-40°C to +85°C) and full-load aging tests to ensure a product lifespan of over 100,000 hours.
• Green Sustainability: The rooftop photovoltaic system covers 30% of the energy consumption, and the metal scrap recycling rate is ≥95%. The company has obtained the ISO 14001 Environmental Management System certification.
Intelligent Warehousing Workshop: High Efficiency and Safety with Zero Loss Management
Baoyu's warehousing system empowers products with the protection throughout their entire lifecycle through technological innovation:
• Precise Environmental Control: Storage at a constant temperature (±1°C) and humidity (40%-60%) eliminates capacitor oxidation and reactor insulation aging.
• Automated Stereoscopic Warehousing: 3D high-density shelves work in tandem with professional maintenance personnel, increasing the storage capacity by 200% and improving order response efficiency by 50%.
• Intelligent Fire Protection: The heptafluoropropane clean gas fire extinguishing system with smoke detection linkage responds to fires in seconds.
• Dust and Static Prevention: A ten-thousand-class clean space combined with ion wind dust removal is suitable for the storage of precision electronic components.
• Monthly Inspections: Professional teams sample and test parameters such as reactor inductance and capacitor capacitance to ensure a factory pass rate of ≥99.9%.
Core Advantages and Global Recognition
• Technological Leadership: The APF series can eliminate harmonics from 2nd to 50th order (THDi < 3%), and intelligent capacitors achieve millisecond-level reactive power compensation, correcting the power factor to 0.99.
• Industry Benchmarking Projects: Successfully applied in projects such as Middle East petrochemical bases, European offshore wind farms, and Southeast Asian data centers, helping customers save more than 25% of electricity.
Our Mission and Vision
Baoyu takes "Intelligently Controlling Electric Energy, Green Driving the Future" as its mission. Through intelligent manufacturing and warehousing systems, it continuously promotes the efficient and low-carbon transformation of power systems, providing trustworthy "Made in China" solutions for global industries and energy sectors.
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