Recently, Jiangsu Elecnova Electric has provided reactive power compensation and harmonic control solutions for well-known domestic agricultural product deep processing enterprise users. The group also involves fields such as medicine, electricity, water conservancy, and logistics. For a long time, the leadership of the enterprise has led its employees and local farmers to adhere to the path of agricultural industrialization, committed to improving the level of agricultural industrialization management and the research and development of high-tech products. At present, it has developed into a large domestic manufacturing enterprise, and its pharmaceutical projects have set up sales institutions in the United States, Europe, South America and other places, making positive contributions to China's export industry.
The enterprise can convert more than 1 million tons of corn annually, and its biopharmaceutical engineering series products have a production capacity that ranks among the top in the world, driving the development of various industries such as local agricultural structural adjustment, planting, animal husbandry, transportation, and surplus labor re employment.
With the rapid development of China's industrial sector, a large number of rectification and nonlinear equipment used by heavy industrial enterprises have also generated a large number of power quality problems, seriously affecting the power quality of the power grid and the user's own power supply network. Common power quality issues include: excessive current harmonics, excessive voltage harmonics, voltage fluctuations and flicker, three-phase imbalance, etc. These power quality issues can cause equipment damage and threaten the safe operation of the power grid and electrical equipment, reduce equipment utilization and service life, and increase energy consumption.
Power Quality Management System
Enterprise users usually adopt a three-level distribution structure, starting from the 35kV/10kV high-voltage main transformer entering the household, passing through the high-voltage distribution to the 10kV/400V transformer, and then to the low-voltage distribution, which is distributed to the power terminal equipment through the 400V bus and switch.
The harmonic current generated by nonlinear equipment such as frequency converters and inverters rises along the power supply circuit to the high-voltage side and has adverse effects on surrounding equipment.
The following are common harmonic source devices.
Harmonics are common and pose significant risks in some manufacturing industries, and they can also pollute the power grid through distribution transformers. Therefore, the solution adopts a combination of active filter (SFR-APF) and reactive power compensation (SFR-LCK) for harmonic control and reactive power compensation, in order to solve the power quality problem of enterprises.
Composition of Power Quality Management System
--SFR-LCK reactive power compensation cabinet
characteristic
Real time compensation, fast output.
Equipped with anti harmonic function.
function
Display information such as voltage, current, and power factor.
--SFR-APF active power filter
characteristic
Adopting a 7-inch human-computer interaction interface.
The full response time is less than 5ms, with faster control and higher efficiency.
function
Display information on system waveform, harmonic spectrum, THDi, THDu, effective current value, power factor, and other system power quality improvements before and after compensation.
By using the Jiangsu Sifei Electric series products, the expected goals have been achieved. The current and voltage THD have decreased to the national standard range, and the monthly average power factor has increased to 0.98. The company's electricity consumption has met the reward requirements of the power supply department, bringing practical economic benefits to the company. At the same time, we also ensure the safe and stable operation of other related equipment (such as significantly reducing transformer noise), improve energy utilization, and reduce line losses.
Write at the end
The SFR-APF series and SFR-LCK series power quality control equipment of Jiangsu Sifel Electric have excellent control effects and eliminate unsafe factors such as resonance risk, helping users solve actual power quality problems. This product will gradually replace traditional capacitor compensation cabinets and become a new generation of power quality management equipment. Jiangsu Sifei Electric adheres to the development concept of independent innovation, creating value for every customer with excellent research and development, high-quality products, and efficient services!
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