PROJECT CASE
Guangda Electric Is A Professional Organization Dedicated To Solving Power Quality Problems Of Users
The medium frequency heating furnace generates a large amount of harmonics during operation. How can this be resolved?
Time：
2019-09-29
Client Name: Central South University Powder Metallurgy Research Institute Harmonic Load: Medium Frequency Induction Furnace Purchased Equipment: Equipment Level Filter SSFGD Design a set of low-voltage equipment level filter SSFGD for the medium frequency furnace to improve power factor, filter out characteristic subharmonics, stabilize system voltage, enhance power quality, and ensure electrical safety.
Customer Name:Central South University Powder Metallurgy Research Institute
Harmonic Load:Medium frequency heating furnace
Purchased Equipment:Device-level filterSSFGD
Project Background
Central South University Powder Metallurgy Research Institute is a comprehensive base for teaching, scientific research, and new product trial development in the field of powder metallurgy in China. It has established three national-level bases: the "National Key Laboratory of Powder Metallurgy", the "National Key Laboratory of Lightweight High-Strength Structural Materials", and the "National Engineering Research Center for Powder Metallurgy". The research institute has 8 research institutes and 5 experimental (testing) centers, equipped with advanced powder metallurgy process equipment and testing instruments, and is one of the first research institutes to obtain the national "foreign trade import and export rights".
Electricity Overview (Medium Frequency Heating Furnace)
The Central South University Powder Metallurgy Research Institute currently has 1 medium frequency heating furnace with a rated power of 160kW and a voltage of 0.4kV. The medium frequency heating furnace is a typical nonlinear load that generates a large amount of 5th and 7th harmonics during operation, affecting the stable operation of other equipment. There is an urgent need to solve the harmonic problem to ensure electrical safety.
Design Plan
Design a set for this medium frequency furnace.Low-voltage device-level filterSSFGD, improve power factor, filter characteristic sub-harmonics, stabilize system voltage, improve power quality, and ensure electrical safety.
Effect Analysis of Device-level Filter
After the operation of the low-voltage device-level filter SSFGD, the total harmonic distortion of the current decreased from 23.4% to 4.5%, and the total harmonic distortion of the voltage decreased from 16.7% to 1.7%, solving the power quality problem for the user.
Operating Data
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Before installation,the total harmonic distortion of the current is 23.4%.approximately. | After installation,the total harmonic distortion of the current is 4.5%.approximately. |
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Before installation,The total harmonic distortion of the voltage is16.7%.approximately. | After installation,The total harmonic distortion of the voltage is 1.7%.approximately. |
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