A Steel Cord Coating Plant in Suzhou
A subsidiary of a foreign-headquartered multinational corporation, this plant is a global leader in technology and market share for steel wire deformation and coating. It is mainly engaged in the production and sale of steel cords and copper-plated steel wires used in steel cords. Its products are applied in automobiles, construction, public facilities, heavy machinery and equipment, and other fields.
The equipment in the coating workshop mainly generates 5th harmonic currents, which are directly injected into the power supply system, leading to an increase in the total harmonic voltage distortion rate of the system. Poor power quality will affect the service life of equipment, reduce workshop production efficiency and increase additional production costs.
Figure 1: Production Workshop of Steel Cord Coating Plant
The recommended solution is to install two sets of NCSF 5th Harmonic Filters, which can effectively reduce the voltage distortion rate of the power supply system, significantly improve the power quality of the production workshop, resolve equipment operation issues, and enhance the efficiency of the production section.
Key Features of NCSF Harmonic Filter
- Significantly reduces the harmonic current content and harmonic voltage distortion rate of the system
- Achieves an improvement effect of over 80% for targeted specific harmonics
- Compensates system reactive power and improves power factor
- Effectively lowers harmonic losses in the system
Figure 2: Cabinet Diagram of NCSF Harmonic Filter
Since the harmonic filters were put into operation on December 5, 2014, 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)