The low-voltage capacitor compensation cabinet in the new materials industry can eliminate a large amount of harmonics and improve the power factor.
Time:
2019-09-24
After the operation of the low-voltage automatic reactive power compensation and filtering device MSFGD, the system power factor improved from 0.75 to over 0.98, and the absolute value of the 5th harmonic current distortion decreased from 135A to 29A, solving the user's power quality issues and saving more than 10% on electricity costs.
Customer Name:Foshan Jinhui High-tech Optoelectronic Materials Co., Ltd.Company
Harmonic Load:Inverter
Usage Location:Low voltage distribution system
Purchased Equipment:1 set of low voltage automatic reactive power compensation and filtering device MSFGD (Low voltage capacitor compensation cabinet)
Project Background
Foshan Jinhui High-tech Optoelectronic Materials Co., Ltd. (referred to as Jinhui Company) was established in2006, with a registered capital of 13.81 million US dollars. It is the first domestic manufacturer to use wet process to produce lithium-ion battery separators, a key high-tech enterprise in the National Torch Program, an innovative enterprise in Guangdong Province, and a project in the top 500 modern enterprises in Guangdong Province. The lithium-ion battery separators developed and produced by the company are well-known in domestic and foreign markets for their stable quality and high cost performance, breaking the long-standing monopoly of foreign products and filling the domestic gap, with product quality reaching the advanced level of similar international products.
Electricity Overview (Inverter)
In the low voltage distribution system of Jinhui High-tech, there are3 transformers of 1600kVA, among which 1 transformer carries the main load of the inverter. The inverter is a typical nonlinear load that generates a large amount of harmonics during operation, with the harmonic spectrum mainly consisting of the 5th and 7th harmonics. A large amount of harmonics seriously affects the safe and stable operation of other electrical equipment on the same bus. Harmonic treatment is required to avoid a large amount of high-order harmonics feeding into the upper-level power grid and to improve the quality of electric energy.

Design Plan
For1 transformer, a set oflow voltage automatic reactive power compensation and filtering deviceMSFGD (low voltage capacitor compensation cabinet) is designed to improve the power factor, filter characteristic sub-harmonics, improve power quality, and ensure the safety of production electricity.
Low VoltageCapacitor Compensation CabinetEffectAnalysis
After the operation of the low voltage automatic reactive power compensation and filtering deviceMSFGD, the system power factor increased from 0.75 to above 0.98, and the absolute value of the 5th harmonic current distortion decreased from 135A to 29A, solving the user's power quality problem and saving more than 10% in electricity costs.
Low VoltageCapacitor Compensation Cabinet Operating Data
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Before installation,the absolute value of the 5th current harmonic distortion is 135Aabout | After installation,the absolute value of the 5th current harmonic distortion is 29Aabout |
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Before installation, the system power factor is 0.75about | After installation, the system power factor is 0.98about |

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