APF wall mounted active power filter

Description :

　　With the introduction and use of various advanced medical equipment (magnetic resonance imaging (MRI), two-dimensional image color B-ultrasound, whole body spiral CT scanner, single (dual) photon emission computed tomography scanner, fully automatic biochemical analyzer, stone crusher using electromagnetic wave technology, gastrointestinal tomography scanner, multifunctional microwave therapy device, etc.), various electronic circuits and power electronics technologies are being applied in modern hospitals, and the role of biomedical engineering in modern hospitals is becoming increasingly important. These instruments not only ensure medical quality, but also cause a large amount of harmonic pollution due to their high load and other characteristics. A large amount of harmonics will inevitably cause serious harm, especially the voltage fluctuations caused by harmonics will affect medical equipment, causing interference from harmonic signals and affecting the performance of the instruments. Of particular note is that hospitals have high requirements for power quality, and the impact of unexpected power outages and grid interference on medical equipment cannot be ignored. Especially for some imported instruments, the requirements for the power grid environment used are very high, because foreign countries have long attached importance to power quality issues and imposed strict restrictions. Many instruments cannot guarantee normal detection in harmonic environments, and even affect their service life.

　　The power quality monitoring and governance system solution proposed by Ankerui Electric can meet the needs of power monitoring management, operation and maintenance, and power quality governance. It is committed to providing a one-stop overall solution for medical industry users, meeting their needs from different aspects such as products, systems, and services, and creating value for users.

　　Elevators, air conditioners, variable frequency water pumps, ventilation, lighting equipment, etc. in hospitals will all generate distortion harmonics. The extensive use of fluorescent lamps can cause significant harmonic currents, with the third harmonic being the highest. When multiple fluorescent lamps are connected to a three-phase four wire load, due to the fact that the third harmonic current belongs to the zero sequence harmonic current and the three-phase vector angles are consistent, the third harmonic current overlaps with the zero line, causing excessive neutral line current. Most hospitals use variable frequency air conditioning and fans, and frequency converters are typical harmonic sources that can generate a large amount of 5th and 7th harmonic pollution to the power grid.

　　The main harmonic sources, harmonic orders, and distortion rates of the hospital power distribution system are shown in Table 1. It can be seen that the harmonics generated by typical hospital equipment are mainly 3rd, 5th, and 7th order. It is these devices that generate harmonics during operation, which affects the power quality of the hospital, and the affected power in turn affects the normal use of the equipment.

　　The key technology of intelligent capacitor reactive power compensation for Ankerui ANAPF wall mounted active power filter

　　1) Adopting imported thyristors to control capacitors for contactless, impact free, and filter free switching, it also has the advantages of low loss, long component life, and maintenance free compared to ordinary compensation cabinets.

　　2) Avoid harmonic resonance and prevent harmonic amplification.

　　3) Quickly track system load reactive power changes and respond dynamically in real-time.

　　4) No impact during switching, achieving zero crossing triggering, fast switching speed, no mechanical contacts, and no arc reignition.

　　By overcoming the key technologies mentioned above, we have developed modern power electronic green energy-saving products, providing petrochemical enterprises with reliable, automated, intelligent energy-saving green products, achieving the goals of energy conservation, cost reduction, and environmental protection.

　　System Introduction

　　Function:

　　The power quality analysis and governance system mainly studies the elimination of reactive power compensation and harmonic governance problems in the power supply and distribution system. Its main products include active power filters, low-voltage reactive power compensation devices, static reactive power generators, hybrid dynamic filtering compensation devices, hybrid dynamic harmonic elimination compensation devices, intelligent dynamic reactive power compensation devices, harmonic protectors, etc. It is suitable for reactive power compensation, harmonic suppression, and comprehensive governance of electrical equipment in industrial, civil, and public buildings in new construction, renovation, expansion, and technological transformation projects. It can provide suitable design solutions according to the power quality problems of different industry types and load types, in order to improve power supply quality and ensure the safe and economic operation of the power system.

　　Application location:

　　(1) Commercial center/office building (air conditioning, elevator, thyristor dimming, etc.);

　　(2) Port terminals/chemical/metallurgical/shipbuilding/papermaking/coal mines (frequency converters, etc.);

　　(3) Communication/Medical/Commercial Center (UPS, Switching Power Supply, etc.);

　　(4) Photovoltaic/charging station/chemical/metallurgical (rectifier, etc.).

　　System functions

　　ANAPF active power filter

　　The ANAPF series active power filters are connected in parallel in low-voltage distribution systems with harmonic loads, and can quickly and real-time track and compensate for dynamically changing harmonic currents.

　　The ANAPF series active power filter collects harmonic currents through a CT acquisition system, quickly calculates and extracts the content of each harmonic current through a controller, generates harmonic current commands, generates compensation currents in the opposite direction to the amplitude of the harmonic current through power execution devices, and injects them into the power system to offset the harmonic currents generated by nonlinear loads.

　　ANSVC Low Voltage Reactive Power Compensation Device

　　The ANSVC low-voltage reactive power compensation device is suitable for automatic reactive power compensation in power grids with a frequency of 50Hz and a voltage of 0.4kV; It integrates reactive power compensation and power grid monitoring. It can not only compensate for reactive power losses in the power grid by switching capacitor banks, improve power factor, reduce line losses, but also enhance the load capacity and power supply quality of the power grid; At the same time, it can also monitor the three-phase voltage, current, power factor and other electrical parameters of the power grid in real time.

　　Discrete component solution

　　The discrete component capacitor compensation scheme consists of a power factor controller, low-voltage switching switch, series reactor, low-voltage power capacitor, etc. Based on the actual situation of the power grid, taking into account both the compensation effect and cost, choose a reasonable compensation form. Fully resolve the contradiction between compensating reactive power and three-phase imbalance, as well as between three-phase compensation and cost.

　　Intelligent capacitor solution

　　The AZC series intelligent capacitors are a new generation of reactive power compensation equipment for 0.4kV, 50Hz low-voltage distribution, which is efficient, energy-saving, reduces line loss, improves power factor and power quality. It consists of an intelligent measurement and control unit, a thyristor composite switch circuit, a line protection unit, and two (△ type) or one (Y-shaped) low-voltage power capacitors. By changing the bulky and cumbersome structural mode of traditional reactive power compensation devices, the new generation of low-voltage reactive power compensation equipment has the characteristics of better compensation effect, smaller size, lower power consumption, cheaper price, more cost savings, more flexible use, easier maintenance, longer service life, and higher reliability, adapting to the higher requirements of modern power grids for reactive power compensation.

　　ANSVG Static Reactive Power Generator

　　Static reactive power generator is a new type of power electronic device used to compensate for reactive power and imbalance. It can quickly and continuously compensate for varying reactive power and negative sequence. Its application can overcome the disadvantages of traditional reactive power compensators such as LC compensators, such as slow response speed, uncontrollable compensation effect, easy parallel resonance and switching oscillation with the power grid.

　　ANSVG-S-G Intelligent Dynamic Reactive Power Compensation Device

　　Intelligent dynamic reactive power compensation device is a new type of power electronic device used to compensate for reactive power, improve power factor, and achieve reactive power compensation effect; The intelligent control system actively adjusts the output of the module based on the linear dynamic requirements of the system; The ANSVG-S-G machine is mainly composed of the ANSVG-S-G module, intelligent controller, and LC module; Capable of compensating for larger capacity reactive power, the entire machine achieves human-machine interaction through a 7-inch touch screen. The touch screen communicates with the ANSVG-S-G module through RS485.

　　ANSVG-S-A series hybrid dynamic harmonic elimination compensation device

　　At present, based on the development of the industry and market demand, the ANSVG-S-A series hybrid dynamic harmonic elimination compensation device applies new technologies, combining the economic efficiency of SVC and the effectiveness of APF filtering, breaking through traditional reactive power compensation technology, and achieving harmonic control and reactive power compensation while effectively reducing costs.

　　The ANSVG-S-A series hybrid dynamic harmonic elimination compensation device is mainly used to compensate for reactive current, harmonic current, and unbalanced current in the power grid, in order to achieve the goals of improving power efficiency, energy conservation, and improving power quality.

　　ANSVG-G-A hybrid dynamic filtering compensation device

　　The hybrid dynamic filtering compensation device can not only compensate for reactive power but also manage system harmonics. The device is connected in parallel to the distribution system to monitor the current component of the system in real time. Through control calculations and logical changes, the required reactive and harmonic components of the system are calculated. Then, the power electronic converter generates the required reactive and harmonic currents in real time and injects them into the distribution system, achieving intelligent compensation and harmonic management.

　　Equipment selection

　　The main methods for improving the power quality of Ankerui ANAPF wall mounted active power filters are filtering and reactive power compensation, including the use of passive filters and active filters.

　　The power quality monitoring and governance system not only serves as a local terminal to provide users with functions such as power quality monitoring, governance, and equipment operation and maintenance, but also can provide remote online services to users by accessing the AcrelEMS MED medical building comprehensive energy efficiency management platform;

　　Fully controlled technology to achieve power quality;

　　Power quality monitoring: Real time online monitoring of power quality, with high measurement accuracy and accuracy, in compliance with IEC61000-4-30 standard;

　　The overall design of the power quality monitoring and governance device achieves unified management and closed-loop control through the upper platform;

　　High quality power quality governance: The supporting power electronic device technology is up to standard, the quality is excellent, and it has networked, controllable, and fast response performance;

　　Comprehensive collaboration of power management services: distribution monitoring management and operation, power analysis and power quality data sharing and integration, providing control measures for enterprise power supply and consumption.

　　Comprehensive monitoring of power quality to ensure power supply reliability

　　Monitor the electrical parameters of the power supply circuit comprehensively to ensure that the equipment's power consumption meets the standard requirements. Microsecond level fault recording and SOE alarm can timely record all data information when the fault occurs, supporting fault tracking and problem localization.

　　Complete power quality management

　　By adopting a centralized and on-site integrated power quality management model, we can better meet the requirements of reactive power and harmonic control, improve the power quality of the entire medical power supply and distribution system, and reduce harm to other power supplies and medical equipment.

　　Data application and value-added services

　　The system provides multi-dimensional electricity consumption index statistics and energy data analysis tools, providing guidance for optimizing distribution system operation management and energy conservation and consumption reduction.

　　APF wall mounted active power filter

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