The Industry The intermediate frequency electric furnace has high electrical efficiency and thermal efficiency, short melting time, power saving, less floor space, low investment, easy to realize process automation and production flexibility. The medium frequency electric furnace is suitable for smelting cast iron, especially suitable for melting alloy cast iron, nodular cast iron and vermicular cast iron.Its adaptability to the charge is also strong, and the variety and size of the charge can be varied within a wide range.   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 main load on the site of a machinery factory is an intermediate frequency furnace. Due to the large amount of harmonics generated when the intermediate frequency furnace works, the transformer on site is noisy, and the protection fuse of the capacitor cabinet is frequently burned out and cannot operate normally. Lower Power Factor(0.66) cause penalty from electricity company.   The Solution For the on-site situation, we configure 500A Active Harmonic Filter and 250kvar Static Var Generator to manage the on-site power quality problems. It can be seen from the field test data (see the figure below) that after the treatment of the YTPQC-AHF active power filter and the YTPQC-SVG Static Var Generator, the field power quality problem has been well resolved, and the current waveform is determined by the sawtooth wave before compensation. It becomes a sine wave, the harmonic current distortion rate is reduced from 61.3% to 3.5%, and the system power factor is increased from 0.67 to 0.99.   The Performance The Picture   Click here to view more applications.  

In modern power systems, the increasing use of power electronic devices like variable frequency drives (VFDs), arc furnaces, and switched-mode power supplies has led to rising levels of harmonic distortion. These harmonics can severely impact system operation, causing overheating, tripping of circuit breakers, and reduced energy efficiency. At YT Electric , we faced these challenges head-on by implementing Active Harmonic Filters (AHF) to ensure compliance with IEEE 519 standards and improve overall power quality. This case study explores how AHFs helped us reduce harmonic distortion levels, enhance power distribution, and achieve significant energy savings. The Problem: Our facility, which relies heavily on non-linear loads such as arc furnaces and power supplies, experienced:   High Total Harmonic Distortion (THD): Exceeding IEEE 519 limits, leading to voltage uncertainty.   Frequent Tripping of Circuit Breakers: Causing unplanned downtime and disrupting system operation.   Overheating of Components: Transformers, cables, and other electrical systems were overheating due to harmonic currents.   Poor Power Factor: Low power factor resulted in penalties from the utility provider.   Reactive Power Issues: Inefficient power distribution and increased energy costs.     We needed a solution to mitigate harmonics and improve power quality without compromising system reliability. Why Active Harmonic Filters (AHF)? After evaluating various harmonic compensation methods, we chose AHFs for their:   Dynamic Harmonic Compensation: AHFs detect and cancel out harmonics in real-time, ensuring clean power.   Wide Frequency Range: They address harmonics from the 2nd to the 50th order, covering a broad spectrum.   Power Factor Correction: AHFs improve power factor, reducing reactive power and energy costs.   Compliance with IEEE 519: AHFs help maintain harmonic distortion levels within permissible limits.     Implementation: Power Quality Analysis: We conducted a detailed assessment of our electrical systems to identify harmonic sources and measure THD.   System Design:  Following the analysis, we strategically installed AHF units at key points within the power distribution network to target harmonic sources effectively. Integration:  The AHFs were smoothly incorporated into our existing infrastructure, ensuring minimal disruption to ongoing system operations. Testing and Calibration: We fine-tuned the AHFs to ensure optimal performance and compliance with IEEE 519 standards.     Results: The implementation of AHFs delivered remarkable results:   Reduced Harmonic Distortion: THD levels dropped to within IEEE 519 limits, ensuring stable system operation.   Improved Power Factor: Achieved near-unity power factor, eliminating penalties and reducing energy costs.   Enhanced Energy Effi...

YTPQC-SVG Static Var Generator in Residential Power Distribution Industry Static Var Generator is based on the voltage-type inverter principle, and uses the insulated gate bipolar transistor (IGBT) to control the size and phase of the inverter AC voltage, so as to achieve the purpose of reactive power and harmonic compensation.Since the switching frequency of IGBT is very high (up to tens of kHz), So the SVG can quickly compensate for the reactive load, At the same time, a very high compensation accuracy can be achieved, The SVG is currently the best solution in the field of reactive power control.     The Background The residential area power grid belongs to the low-voltage distribution network, which is generally connected to the large power grid by 10/0.4kV transformer. The load in the network is mostly working in the three-phase 480V and single-phase 220V voltage levels, mainly for some small capacity loads, such as air conditioning, refrigerator, TV and other household appliances.Most household appliances are non-linear loads and produce a lot of reactive power during use.   The PQ Problem Reactive power is too large, its adverse effects are also very prominent, the increase of reactive power will lead to the increase of the system current and apparent power, resulting in the capacity of the generator, transformer and other electrical equipment and wire increase.The increase of reactive power will increase the total current, thus increasing the loss of the equipment and the line, and increasing the voltage drop of the line and the transformer.   The Solution of YTPQC-SVG Mixed reactive power compensation is widely used in residential distribution networks. The compensation capacity is generally configured according to 30% of the transformer capacity, and the SVG capacity and capacitor capacity are generally configured according to user needs.The transformer capacity of a residential distribution station in Shanghai has 800kVA, and a 240kvar YT-SVG Static Var Generator device is equipped on site.   The Technical Performance Reactive power and power factor before compensation Reactive power and power factor after compensation   The Photo  Click here to view more applications.

YTPQC-SVG Static Var Generator in Petrochemical industry YTPQC-SVG Static Var Generator detects load current in real time through internal and external CT and analyzes the reactive current of load by TI DSP and FPGA, then generates PWM signal to IGBT inverter(3 Level) to generate inductive or capacitive current and compensate reactive current to realize the target power factor. YTPQC SVG can also compensate phase imbalance.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 Petrochemical 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 company have a large penalty from electricity company due to the poor power factor.   The Solution YTPQC-SVG 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 filter panels and 4 sets 400kVAr Static Var Generator 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.    

There are a number of electrical devices that have nonlinear operating characteristics i.e even when applied voltage is sinusoidal in nature, the current drawn by the device is non-sinusoidal in nature. These nonlinear devices used in power distribution circuits create nonlinear currents and which subsequently causes voltage distortions. These nonlinear currents and voltages have been generally referred to as harmonic currents and voltages. The proliferation of electronic switching devices in modern equipment has resulted in a significant increase in the amount of harmonic pollution in the electrical distribution systems. These harmonics if disregarded or undetected may cause harmonic resonant conditions, which could present system operating problems resulting in complaints from customers and reduced life of power equipment as well as degraded efficiency and performance. Harmonic currents and voltages can cause many unfavourable effects on the power system itself and the connected loads. Malfunctioning of electronic equipment, capacitor failure, transformer and neutral conductor over overheating, excessive heating in rotating machinery are some of these effects.   The Background Zhenjiang Naisi New Material Co., Ltd. is mainly engaged in the production and sales of new ultra-hard composite wear-resistant cutting wires, photovoltaic wire cutting wheel recycling coating process processing, production of steel cords, technical services and testing services for the above products, self-operated and acting for the import and export business of various commodities and technologies (except for commodities and technologies that are restricted by the state or prohibited from import and export), sales of silicon materials.   The PQ Problem Due to the Harmonic Voltage and Harmonics Current in the old factory building of the customer, the capacitors are often damaged, so the need for harmonic mitigation is generated.   The YT Solution In view of the high current distortion rate (High THDi)and voltage distortion rate(THDv) in the field, installing an Active Harmonic Filter at the low-voltage side can reduce Current Harmonics (THDi) and Voltage Harmonics accordingly.   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 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 30% to about 1.5%. The harmonics include the 3rd, 5th, and 7th harmonics, and the 5th harmonic is the most serious. After the Active Harmonic Filter is installed, the waveforms are close to standard sine waves, and after compensation, the harmonic current content is significantly reduced, achieving a perfect compensation effect.     The Picture   Click here to view more applications.  

YTPQC-HPFC hybrid Static Var Generator adopts the configuration scheme of combining YTPQC-ASVG Advanced Static var Generator and switching capacitor/reactor, and implements different reactive compensation schemes according to the actual needs of users on site, so as to achieve the best combination of price and effect. YTPQC-HPFC hybrid reactive power compensation device consists of two parts: Static Var Generator and switching capacitor / reactor reactive compensation unit. In YTPQC-HPFC hybrid dynamic reactive power compensation device, each unit is designed and produced in the method of low power, small volume and low cost, and both of them are optional, and can be combined in the best and flexible way according to the actual reactive state of the site, so as to achieve the optimum ratio of operation effect and cost.   The Background Residential community power grids belong to low-voltage distribution networks, generally connected to large power grids by 11/0.4kV transformers. Most of the loads in the grid work at three-phase 480V and single-phase 2230V voltage levels, mainly small-capacity loads, such as air conditioners, refrigerators, and televisions. Machines and other household appliances. Most household appliances are non-linear loads, which generate a large amount of reactive power during use.   The PQ Problem Reactive power is very important to the normal operation of the power grid system and load, but excessive reactive power has very prominent adverse effects. The specific manifestations are as follows: Increase equipment capacity: The increase of reactive power will lead to the increase of system current and apparent power, which will increase the capacity of generators, transformers and other electrical equipment and wires. Increase line loss: The increase of reactive power will increase the total current, thereby increasing the loss of equipment and lines, and the voltage drop of lines and transformers.   The Solution YTPQC-HPFC Hybrid reactive power compensation is widely used in residential distribution networks. The compensation capacity is generally configured according to 30% of the transformer capacity, and the SVG capacity and capacitor capacity are generally configured according to user needs. The transformer capacity of a substation in a Shanghai community is 800kVA, and a 240kvar YT-CSVG hybrid dynamic var compensator is configured on site, of which the SVG capacity is 50kvar and the capacitor capacity is 190kvar. After the equipment is running, the on-site power factor rises from 0.90 to about 1.   The Technical Performance   The Photos   Click here to view more applications.    

YTPQC-HPFC hybrid reactive power compensation adopts the configuration scheme of combining YTPQC-ASVG Advanced Static var Generator and switching capacitor/reactor, and implements different reactive compensation schemes according to the actual needs of users on site, so as to achieve the best combination of price and effect. YTPQC-HPFC hybrid reactive power compensation device consists of two parts: Static Var Generator and switching capacitor / reactor reactive compensation unit. In YTPQC-HPFC hybrid dynamic reactive power compensation device, each unit is designed and produced in the method of low power, small volume and low cost, and both of them are optional, and can be combined in the best and flexible way according to the actual reactive state of the site, so as to achieve the optimum ratio of operation effect and cost.   The Background The automobile manufacturing industry is a typical heavy industrial industry, and its electricity demand has many characteristics, such as large power demand, lower power factor of electrical equipment, many typical nonlinear loads and impact load equipment, and high power quality requirements.   The PQ Problem The automobile manufacturing industry is a typical heavy industrial industry, and its load is large, and there are also a large number of impact loads, resulting in a rapid load change, so that the traditional capacitor cabinet reactive power compensation cannot keep up with the load change. Considering the cost and practicability, the hybrid reactive power compensation method is generally used for reactive power compensation. The hybrid dynamic reactive power compensation device consists of two parts - SVG Static Var Generator and switching capacitor&reactor reactive power compensation part. For large-capacity, fixed reactive power, configure switching capacitors for compensation; for small-capacity, fast-changing reactive power, configure corresponding static var generator capacity for compensation; hybrid dynamic reactive power compensation ensures switching accuracy And the response speed at the same time improves the service life of the equipment.   The Solution YTPQC-HPFC Yibin Kaiyi Automobile Co., Ltd. is the leading engine for Yibin to build a 100 billion-level automobile industry, and a pillar enterprise of vehicle production in Sichuan Province. In order to ensure the power quality of the enterprise, a large number of hybrid reactive power compensation devices are installed in the park for reactive power management. The following is a set of 200kvar SVG+400kvar  hybrid Static Var Generator compensation device. After the equipment is running, the on-site power factor rises from 0.90 to about 0.99.   The Technical Performance   The Photos   Click here to view more applications.  

Hybrid Var Compensator in Photovoltaic Power Generation Transformation YTPQC-HPFC Hybrid Static Var Generator can perform the following functions: Fast reactive power calculation module, can realize power factor calculation, static reactive power generator power calculation and other functions;The reactive power optimization distribution module can realize the functions of determining the switching control of the capacitor group and determining the reactive power output of the reactive power generator;SVG module, can realize the output voltage and current feedback control, PWM control selection and other modules;Human-machine interface module, can realize the LCD panel interface access function;DSP control module can realize signal acquisition, PWM output, human-machine interface function and external communication functions. In the reactive power optimization distribution module, the device adopts SVG and TSC mixture for reactive power compensation, SVG detects the reactive power system, controls the capacitor switching, and determines the capacity and moment of reactive power generation.     The Background Shanghai Trust Electric Co., Ltd. due to the low power factor, will produce a certain amount of electricity charges (fine), last year a total amount of fines reached 30,000 yuan.At present, the company has added photovoltaic power generation equipment in the park, resulting in lower site power factor, more serious fines, and in recent months, electricity fines have reached 2~3W.The customer hopes to control the power quality of the park and solve the problem of electricity fee fine.   The PQ Problem Capaciitor cabinet is used for reactive power compensation on site. Due to the ladder of capacitors compensation and slow response speed, reactive power cannot be quickly and completely filtered in the grid.In the case of a certain reactive power, the active power on the meter is small, the calculated power factor will be low, resulting in a fine. At the same time, we found that the harmonic current content on the low voltage side of T1 transformer exceeded the standard. After field observation, we found that the harmonic is generated by the capacitor in the capacitor cabinet. After the capacitor is put into the grid, the resonance leads to harmonic amplification.Harmonic current will also lead to power factor reduction, and has great harm to the capacitor, easy to cause capacitor damage. Site test report   The Solution YTPQC-HPFC According to the actual situation on the site, in order to solve the problem of site fine, the reactive power in the 10kV system should be treated, and the compensation accuracy demand is extremely high, so the  YTPQC-HPFC Hybrid Static Var Generator  must be used to make reactive power compensation. At present, the remaining reactive power on site is about 200kvar. Considering a certain allowance and subsequent load increase, it is recommended to configure  YTPQC-HPFC Hy...

In today’s fast-paced industrial landscape, maintaining a stable and efficient power supply is critical. Power quality issues like voltage fluctuations, harmonic distortions, and reactive power imbalances can lead to equipment damage, production downtime, and increased energy costs. SVGs play a critical role in industries that depend on high-quality, harmonic-free power. . SVGs are advanced power electronics devices. They help improve power quality and ensure smooth operation in industrial power systems. In this article, we’ll explore the How Static Var Generators Improve Industrial Power Quality in industrial settings. 1. Improved Power Quality One of the primary benefits of SVGs is their ability to enhance power quality. Industrial facilities often deal with problems like voltage sags, swells, and harmonic distortions. These issues can disrupt operations and harm sensitive equipment.SVGs Automatically compensate for reactive power and stabilize voltage levels, ensuring a consistent and clean power supply. By maintaining optimal power quality, SVGs help prevent equipment failures and reduce the risk of production downtime. 2. Enhanced Energy Efficiency Energy efficiency is a top priority for industrial facilities looking to reduce operational costs and meet Eco-friendliness goals. SVGs play a crucial role in improving energy efficiency by reducing reactive power losses.Traditional power systems often generate excess reactive power, which wastes energy and increases electricity bills. SVGs actively manage reactive power and ensure that they supply only the necessary amount. This not only lowers energy use but also cuts carbon emissions. This makes SVGs a green choice for industrial power systems. 3. Increased Equipment Lifespan Industrial machinery and equipment are significant investments, and their longevity depends on the quality of power they receive. Poor power quality can cause overheating, wear and tear, and premature failure of equipment. By stabilizing voltage and reducing harmonic distortions, SVGs protect equipment from damage and extend its lifespan. This translates to lower maintenance costs and fewer replacements, saving industrial facilities time and money in the long run. 4. Better Grid Stability For industries connected to the power grid, maintaining grid stability is essential. Fluctuations in reactive power can lead to grid instability, causing blackouts or brownouts that disrupt operations.SVGs provide fast and accurate reactive power compensation, helping to balance the grid and prevent instability. This is especially important for industries that need a lot of power. This includes manufacturing plants, data centers, and renewable energy facilities. With SVGs, industrial facilities can ensure a reliable power supply and avoid costly disruptions. 5. Support for Renewable Energy Integration As the world shifts towards more sustainable energy sources, integrating renewable energy into th...