PROJECT CASE
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Case Study | [Casting Industry] Example Demonstrating How Low-Pressure Capacitor Compensation Cabinets Save Customers Over 10% on Electricity Costs
Time：
2019-09-27
Customer Name: Boluo Giant Machinery Parts Casting Co., Ltd. Harmonic Load: Medium Frequency Furnace Purchased Equipment: 1 set of Low Voltage Automatic Reactive Power Compensation and Filtering Device MSFGD (Low Voltage Capacitor Compensation Cabinet) Design a set of Low Voltage Automatic Reactive Power Compensation and Filtering Device MSFGD (Low Voltage Capacitor Compensation Cabinet) for the low voltage side of the transformer to improve power factor, filter out characteristic sub-harmonics, enhance power quality, and ensure the safety of production electricity.
Customer Name:Boluo Giant Machinery Parts Casting Co., Ltd.Company
Harmonic Load:Medium Frequency Furnace
Purchased Equipment:1 set of low voltage automatic reactive power compensation and filtering device MSFGD (Low Voltage Capacitor Compensation Cabinet)
Project Background
Boluo County Giant Machinery Parts Casting Co., Ltd. is a manufacturer specializing in the production of various high-quality ductile iron, various high-grade gray cast iron, and various alloy cast iron using furan resin self-hardening sand technology. The main production equipment includes cupola furnace,2T medium frequency electric furnace, resin sand production line, shot blasting machine, lost foam production line, etc.The main products arevarious large castings of pig iron(1-20 tons),various machine tool castings, machine bodiesandhigh-grade castings..
Electricity Overview (Medium Frequency Furnace)
Boluo County Giant Machinery Parts Casting Co., Ltd.1 transformer with a rated capacity of 2000kVA, voltage level 10kV/0.72kV,the main load is3T medium frequency furnace and 5T medium frequency furnace. The medium frequency furnace is a typical nonlinear electrical load, which generates a large amount of high-order harmonics during operation, mainly consisting of the 5th, 7th, and 11th harmonics,a large amount of harmonics severely 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 electrical energy.
Design Plan
Design for the low voltage side of the transformer1 set oflow voltage automatic reactive power compensation and filtering deviceMSFGD (Low Voltage Capacitor Compensation Cabinet), to improve power factor, filter characteristic sub-harmonics, improve power quality, and ensure the safety of production electricity.
Low Voltage Capacitor Compensation CabinetEffectAnalysis
After the operation of the low voltage automatic reactive power compensation and filtering deviceMSFGD, the system power factor increased from about 0.85 to above 0.95, the absolute value of the 5th harmonic current distortion decreased from 160A to 29A, and the absolute value of the 7th harmonic current distortion decreased from 80A to 21A, solving the user's power quality problems and saving more than 10% of electricity costs.
Operating Data
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Before installation,the absolute value of the 5th current harmonic distortion is 160Aabout | After installation,the absolute value of the 5th current harmonic distortion is 29Aabout |
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Before installation,the absolute value of the 7th current harmonic distortion is 134Aabout | After installation,the absolute value of the 5th current harmonic distortion is 32Aabout |
Guangda ElectricThoughtful Suggestions:
InGuangda Electricgoodpowerbrand building, we insist on providing sufficient value returns and feedback to every user who believes in us. To achieve stable product quality, werequireGuangdapeople to reach200% ofcraftsmanshipin material selection, we cannot afford mistakes, and in craftsmanship, we do not allow laziness.
Dear customers, please rest assured of our craftsmanship, products, and services. We are committed to becoming a valuablemanufacturer of low voltage capacitor compensation cabinetsand harmonic treatment manufacturers.
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