A Steel Plant in Guangzhou
Established in October 2000 and covering an area of 200,000 square meters, it is an integrated enterprise engaged in the production and deep processing of aluminium plates, aluminium tubes and aluminium rods. The company has a complete production line ranging from mould making, melting and casting, extrusion, precision drawing, stretching, oxidation, polishing to powder spraying and oil spraying, with an annual production capacity of over 50,000 tons.
The equipment in the processing workshop mainly generates 5th harmonic currents, causing severe distortion of the operating voltage and current waveforms. A large amount of harmonic currents flowing through equipment such as cables and transformers will result in additional harmonic losses and temperature rise, leading to increased maintenance costs of production equipment and shortened service life of the equipment.
Figure 1: Metal Material Processing Workshop
The recommended solution is to install one set of NCSF 5th Harmonic Filter, which can effectively reduce the harmonic content of the power supply system, significantly improve the power quality of the processing workshop, and lower the losses and temperature rise caused by equipment operation.
Key Features of NCSF Harmonic Filter
- Significantly improves the harmonic current content and harmonic voltage distortion rate of the system
- Achieves an improvement effect of over 80% for targeted specific harmonics
- Compensates for the system's reactive power and improves the power factor
- Effectively reduces harmonic losses in the system
Figure 2: Cabinet Diagram of NCSF Harmonic Filter
Since the harmonic filters were put into operation on December 20, 2012, they have significantly reduced the 5th harmonic voltage distortion rate of the system while improving the system power factor. The power quality measurement data of the system main circuit before and after the improvement are summarized in Table 1.
Table 1: Summary of System Improvement Effects (Before & After)
Figure 3: System Voltage and Current Waveforms (Before Improvement)
Figure 4: System Voltage and Current Waveforms (After Improvement)
Figure 5: Time-Lapse Graph of Total Harmonic Current Distortion Rate (Before & After Improvement)