The AHF in Hospital Hospitals are places where reliable power distribution is needed to guarantee patient health and save lives. Continuity and reliability of power supply are extremely important. Automatic power restoration time of different healthcare venues is as follows: category 0 venues t≤15s; category 1 venues 0.5s≤t≤15s; and category 2 venues t≤0.5s.   The Background The use of new medical equipment, such as X-ray machines, CT scanners, MRI scanners, and others is increasing in hospitals. Equipment loads contain a high volume of harmonic current, and can impact the hospital power distribution system thereby reducing power quality. Harmonic management is necessary to ensure the safety of hospital distribution systems. UPSs are increasingly common as hospitals pursue a reliable power supply. As most UPSs use 6-pulse or 12-pulse rectifiers, a high volume of harmonic current can flow into the grid and affect grid stability.   The PQ Problem Harmonics affect lighting stability and interfere with precision medical instruments such as CT scanners, MRI scanners and ECGs, reducing examination accuracy and ultimately affecting physician diagnoses of patients’ conditions. In addition, high volumes of harmonic current also reduce the stability.   The Performance There are some harmonic problems in Building 3 of Shanghai Tongren Hospital. In order to avoid the impact of harmonics on the normal work of the hospital, a 200A Active Harmonic Filter is installed to control the harmonics.After AHF installation, the field harmonic problem has been well improved, and the current distortion rate is reduced from about 12% to about 2%.   The Picture   Click here to view more applications.  

YTPQC-APF in combustion power generation YTPQC-APF, Active Power Filter reduced harmonic levels results in improved electrical network reliability and reduced operating costs. Nuisance tripping of protective devices and nuisance clearing of fuses due to harmonic heating effects is greatly reduced.Overheating of motors, transformers, switch-gear and cables is also reduced which increases their life expectancy and reduces maintenance costs. For new installations, over-sizing of distribution equipment to reduce harmonic susceptibility can be reconsidered.   The Background With the rapid economic development and the rapid expansion of urban scale, urban household garbage has increased day by day, and waste incineration and power generation has also gradually began to be widely used.The main power equipment for waste incineration power generation includes incinerator, bucket, exhaust system and various water pumps, which will produce a large number of harmonic and reactive power in the process of use, which need to be treated.   The PQ Problem A waste incineration power plant was established in 2004 and mainly operating products include waste treatment, power generation and heating.In the process of production and power generation, the equipment produced a large number of reactive harmonics and 5th and 7th order harmonics, resulting in the decline of electric power quality, the urgent need of treatment.   The Solution YTPQC-APF The site load mainly includes carding machine, needle acupuncture machine, non-woven oven, coil machine, etc., which will produce a large number of harmonics in the production process, resulting in the field capacitance compensation cabinet can not work normally.In order to ensure the normal operation of the field capacitors cabinet, the 300A active power filter cabinet is installed on site for harmonic mitigation. The main data before installation of APF, THDi is 16.4%, the main harmonics are 5th,7th order, Power factor is 0.85.   The Technical Performance For dealing with the reactive power and harmonics at site,  install an YTPQC-APF-450A Active Power Filter at site. After installation of APF, THDi reduce to 1.9%,  Power Factor increase to 1. The compensation effect is good, which completely solves the reactive and harmonic problems at site. Harmonics Before YTPQC-APF Harmonics after YTPQC-APF Current waveform before YTPQC-APF Current waveform after YTPQC-APF The Photos     Click here to view more applications.    

AHF&SVG in Data Center Industry The Active Harmonic Filter adopts advanced power electronics technology to detect the harmonics in the grid in real time, generate the reverse phase compensation current through the converter, and dynamically filter out the harmonics in the grid.Static Var Generator can be real-time dynamic compensation, can compensate for the perceptual reactive power and the tolerance of the reactive power, and will not occur overfill, underfill, can stabilize the system voltage.     The Background   Due to the uninterrupted load power supply in the data center machine room, a large number of UPS and switching power supply and frequency conversion air conditioning are used.The input levels of these devices are three-phase arrangement, generating a large number of harmonics.Switch the power supply and UPS equipment to first rectify the AC into DC, and then through the secondary transformation, into the corresponding DC and AC.During the period, the primary current of the transformer is controlled through the switch pipe, not only generating harmonic during the rectification, but also reflects the high frequency harmonic to the power supply, resulting in high neutral current of the distribution transformer, and the harmonic will be polluted to the grid through the distribution transformer.     The PQ Problem   Both the switching power supply and the input of the UPS generate a harmonic current, and the final harmonic current is pooled on the total generating row.A large amount of harmonic current will cause the following harm to the communication room: harmonic current will interfere with the communication signals of adjacent wires.The harmonic current in the power grid increases the total current, which can easily lead to the misaction of the protection devices and lead to delayed work accidents.Harmonics will reduce the stability and life of equipment, cables, transformers and other equipment.Harmonic current occupies the transformer capacity, increases the load rate of the transformer, and may cause the transformer noise.If the necessary harmonic control measures are not taken, it will bring serious harmonic pollution to the input power grid.When serious, it will endanger the safe operation of the input grid and various electrical equipment across the grid in this grid.   The Solution of YTPQC-AHF and YTPQC-SVG   There is a serious current harmonic problem in a data center, and the harmonic current distortion rate reaches 32.8%, mainly for 3,5 and 7 harmonics.Through field testing and simulation analysis, our technical team gives a configuration scheme of 1200A  Active Power Filter and 600Kvar Static Var Generator for harmonic filtering and reactive power compensation.     The Technical Performance   After the YTPQC-APF Active Power Filter device management, the field harmonic current decline range is very obvious, the current distortion rate on the site will decrea...

YTPQC-AHF Active Harmonic Filter in Chemical Fiber YTPQC-AHF Active Harmonic Filter reduced harmonic levels results in improved electrical network reliability and reduced operating costs. Nuisance tripping of protective devices and nuisance clearing of fuses due to harmonic heating effects is greatly reduced.Overheating of motors, transformers, switch-gear and cables is also reduced which increases their life expectancy and reduces maintenance costs. For new installations, over-sizing of distribution equipment to reduce harmonic susceptibility can be reconsidered.   The Background The main loads used in the chemical industry are motors. With the maturity of science and technology and more and more development towards energy saving and intelligent direction, a large number of energy saving and a large number of inverter leads to a large number of 3 / 5 / 7 / 11 (2n + 1) sub harmonics.   The PQ Problem Jiangsu hengke new material co., LTD. is located in Nantong TongZhou Binjiang district (WuJie Town) HengLi textile new material industrial park, park with a total investment of 20 billion yuan, stage construction annual output of 2.4 million tons of differentiated, functional new fiber and intelligent, super simulation function polyester new materials, science, industry, trade integrated industrial base, high-tech textile materials. The harmonic source is mainly 6-pulse frequency converter at site, and the main harmonics are 5th or 7th harmonics.   The Solution YTPQC-AHF The harmonic source is mainly 6-pulse frequency converter at site, and the main harmonics are 5th or 7th harmonics. According to the load situation, 2 sets 450A active harmonic flter panels and 4 sets 375A Active Harmonic Filter panels are configured for harmonic control.   The Technical Performance Take a 375A AHF panels for example, THDi is 50% before AHF, and the THDi reduced to 5% after AHF installation. The compensation effect is good, which completely solves the reactive and harmonic problems in the field.   The Photos   Click here to view more applications.    

The Industry A large number of automation equipment in commercial complex automation systems requires high quality power supply.However, a considerable part of these devices have become the harmonic distortion disturbance source of the low-voltage power supply system due to their nonlinear load characteristics.Cause distribution system pollution, harm to the surrounding communication system and even the distribution system. The background Commercial complex harmonic mainly has the following two sources: The harmonic sources formed by a large number of nonlinear loads, such as elevator / escalator, water supply system pump and air conditioning fan inverter, office and computer network, UPS power supply, electronic lighting, cause voltage and current distortion of distribution system; accounting for more than 80% of the total harmonics. Background harmonic, the public power grid itself has a certain harmonic content, transmitted from the power grid side to the distribution system. The Problem The load in the commercial complex system mainly includes lighting, elevator, central air conditioning, etc., among which the single-phase load equipment such as lighting mainly produces 3 harmonics, while the elevator and central air conditioning load driven by frequency converter mainly produces 5,7,11 and 13 harmonics.For the harmonic situation of commercial complex system, the best solution is to adopt active filtering technology.The active filter device adopts advanced power electronics technology to detect the harmonics in the grid in real time, generate the reverse phase compensation current through the converter, and dynamically filter out the harmonics in the grid. The Solution The main load of Shanghai National Exhibition Center is elevator / escalator, water supply system pump and air conditioning fan inverter, office and computer network, UPS power supply, electronic lighting, etc., which produces a large number of harmonics in the process of use. According to the site situation, we configure 400A active filter cabinet, and the following is the on-site governance effect.After the YTPQC-APF active power filter device treatment, the current waveform is well improved, and the harmonic current distortion rate is reduced from 34.7% to 1.5%. The Performance The Picture   Click here to view more applications.  

Active Harmonic Filter in Metro, Railway By the end of 2020, China had a total of 146,000 kilometers of railways in operation and 37,900 kilometers in operation, ranking first in the world.High-speed rail traction transformer generally adopts 12 or 24 pulse rectification, will produce 11th and 13th order harmonics; distribution transformer load mainly includes frequency converter, UPS, elevator, lighting, 3rd,5th,7th,11th and 13th order harmonics.   The Industry Because the transportation power grid system contains a large number of non-linear equipment, the equipment will produce a large number of harmonics. When the harmonic content of the power grid is high, it will cause certain harm to the transportation power and lighting system. The relay protection equipment and automatic device in the power system mistakenly move or refuses, which directly endangers the safe operation of the power grid, and causes serious system collapse and user power failure accident. All kinds of electrical equipment will produce additional loss and heating, and will increase the vibration and noise of the motor and transformer. The harmonic current will interfere with the communication system and reduce the transmission quality of the signal. Increase the possibility of resonance in the power grid, causing over-current or over-voltage causing danger. The capacitor reactive power compensation device produces harmonic amplification, making the capacitor damage or even explode.   The PQ Problem Transportation power distribution system is mainly 3rd, 5th, 7th, 11th, 13th order harmonics, which has great harm to the power system, and needs to use active power filter for governance.The active filter device adopts advanced power electronics technology to detect the harmonics in the grid in real time, generate the reverse phase compensation current through the converter, and dynamically filter out the harmonics in the grid.   The Solution YTPQC-AHF Due to the large harmonics on the Shanghai subway line, in order to ensure the normal operation of the capacitor in the on-site reactive power compensation cabinet, a 100A active harmonic filter is installed on the site to control the harmonics.After treatment, the field harmonic problem has been well improved, and the current distortion rate is reduced from about 16% to about 3%. The Technical Performance The Picture     Click here to view more applications.    

AHF&SVG in Metallurgical Industry YTPQC-AHF Active Harmonic Filter reduced harmonic levels results in improved electrical network reliability and reduced operating costs. Nuisance tripping of protective devices and nuisance clearing of fuses due to harmonic heating effects is greatly reduced.Compared with the traditional capacitor bank, YTPQC-SVG Static Var Generator has the advantages of fast response and high compensation accuracy without under-compensation or over-compensation problems, avoid reasonance,etc.   The Background The development of modern industry increases the demand for metals, making the metallurgical industry develop rapidly.The electrical equipment of metallurgical enterprises has the characteristics of large capacity, most of the perceptual load, large load impact and braking speed, high degree of automation, work continuity and so on.   The PQ Problem Medium-frequency furnace is widely used in the metallurgical industry, mainly used in the smelting of non-ferrous metals and ferrous metals.The working frequency of medium frequency furnace is between 50~20000 Hz, which has the advantages of high thermal efficiency, short melting time, less burn loss of alloy elements, wide melting materials, less pollution to the environment, and can accurately control the temperature and composition of metal liquid.However, in the use of medium frequency furnace, it will produce a large number of harmonics, resulting in serious harmonic pollution in the power grid, causing great harm to the whole power system.   The Solution YTPQC-AHF and YTPQC-SVG According to the field situation, we configure 500A Active Harmonic Filter and 250kVAr Static Var Generator to address the field power quality problems. The Technical Performance From the field test data (below figure), after the YTPQC-AHF and YTPQC-SVG, the field power quality problem is well solved, the current waveform from zigzag wave to sine wave, the harmonic current distortion rate from 61.3% to 3.5%, and the system power factor from 0.67 to 0.99.   The Photos   Click here to view more applications.  

YTPQC-APF in Textile industry YTPQC-APF, Active Power Filter reduced harmonic levels results in improved electrical network reliability and reduced operating costs. Nuisance tripping of protective devices and nuisance clearing of fuses due to harmonic heating effects is greatly reduced.Overheating of motors, transformers, switch-gear and cables is also reduced which increases their life expectancy and reduces maintenance costs. For new installations, over-sizing of distribution equipment to reduce harmonic susceptibility can be reconsidered.   The Background With the development of social economy and science technology, many textile printing and dyeing enterprises in order to improve the product quality of transformation technology, large use of VFDs, DC equipment, including ventilation equipment (including frequency conversion fan and air conditioning), lighting equipment, production equipment (yarn, fine sand, grasp cotton, shaping machine, dyeing cylinder, etc.), produce a large number of 5th,7th order harmonic, cause harmonic, harmonic pollution, lead to power quality decline.   The PQ Problem A company is specialized in the production of non-woven fabric manufacturer, producing a variety of short fiber non-woven cloth, varieties of melt-blown non-woven cloth, synthetic leather non-woven cloth, acupuncture non-woven cloth, propylene non-woven cloth, water absorption pad, filter non-woven cloth, antibacterial cotton, automotive interior materials, oil absorption mat and other non-woven products.   The Solution YTPQC-APF The site load mainly includes carding machine, needle acupuncture machine, non-woven oven, coil machine, etc., which will produce a large number of harmonics in the production process, resulting in the field capacitance compensation cabinet can not work normally.In order to ensure the normal operation of the field capacitors cabinet, the 300A active power filter cabinet is installed on site for harmonic mitigation.   The Technical Performance The THDV at site is 5.9%, exceeding the national standard limit of 5%, the THDi is 23.5%, the harmonic current is mainly 3rd, 5th, 7th order harmonics, and also contains a small number of 2nd and 4th even harmonics. After treatment, THDv decreased to 2.2%, the THDi decreased to 2.0%, and the current waveform was also restored to the sinusoidal wave type. Current THD before YTPQC-APF Current THD  after  YTPQC-APF Current waveform before YTPQC-APF Current waveform after YTPQC-APF   The Photos   Click here to view more applications.    

The Industry A large number of automation equipment in commercial complex automation systems requires high quality power supply.However, a considerable part of these devices have become the harmonic distortion disturbance source of the low-voltage power supply system due to their nonlinear load characteristics.Cause distribution system pollution, harm to the surrounding communication system and even the distribution system.   The background Commercial complex harmonic mainly has the following two sources: The harmonic sources formed by a large number of nonlinear loads, such as elevator / escalator, water supply system pump and air conditioning fan inverter, office and computer network, UPS power supply, electronic lighting, cause voltage and current distortion of distribution system; accounting for more than 80% of the total harmonics. Background harmonic, the public power grid itself has a certain harmonic content, transmitted from the power grid side to the distribution system. The Problem The load in the commercial complex system mainly includes lighting, elevator, central air conditioning, etc., among which the single-phase load equipment such as lighting mainly produces 3 harmonics, while the elevator and central air conditioning load driven by frequency converter mainly produces 5,7,11 and 13 harmonics.For the harmonic situation of commercial complex system, the best solution is to adopt active filtering technology.The active filter device adopts advanced power electronics technology to detect the harmonics in the grid in real time, generate the reverse phase compensation current through the converter, and dynamically filter out the harmonics in the grid.   The Solution The main load of Shanghai National Exhibition Center is elevator / escalator, water supply system pump and air conditioning fan inverter, office and computer network, UPS power supply, electronic lighting, etc., which produces a large number of harmonics in the process of use. According to the site situation, we configure 400A Active Harmonic Filter cabinet, and the following is the on-site governance effect.After intalled YTPQC-SVG, the PF changed from 0.91 to 1.Meanwhile, installed the YTPQC-SVG Static Var Generator , the current waveform is well improved, and the harmonic current distortion rate is reduced from 34.7% to 1.5%.   The Performance The Picture   Click here to view more applications.