In recent years, many port enterprises have increasingly adopted SCR rectifier and SCR converter equipment, which has led to a significant decline in overall power distribution quality. A more critical issue arises when the high-order harmonics generated by these devices interact with system capacitive reactance and system impedance, forming series or parallel resonance under certain conditions. This resonance effect causes serious equipment damage and has drawn considerable attention to the harmful impact of harmonics on port power distribution systems.

At ports, the widespread use of high-speed variable-frequency door cranes makes it difficult to apply conventional reactive power compensation devices for power factor correction. Harmonics circulating through cables and transformers increase transmission losses, leading to higher active losses and rising electricity costs for users. Additionally, many port operators face penalties and fines ranging from 10,000 to 20,000 per month due to low power factor and poor power quality.

Recognizing the need for energy savings, efficiency improvement, and environmental protection, forward-thinking ports have invested in advanced power quality solutions.

Adopted Solution

By installing Elcosine Dynamic Anti-Harmonic Reactive Power Compensation Devices, ports achieved:

• Power Factor Improvement: Average power factor increased to above 0.95

• Harmonic Suppression: Significant reduction in harmonic content, minimizing system resonance risks

• Energy Savings: Noticeable decrease in active losses, directly lowering electricity costs

• System Reliability: Enhanced power quality and stable operation of sensitive equipment

This comprehensive solution not only improved the efficiency of port operations but also delivered sustainable energy savings and cost reductions, aligning with modern goals of energy conservation and green development.