The automobile manufacturing industry uses a large number of impactful, nonlinear loads in the main production processes, such as electric welding machines and laser welding machines in body shops; Stamping machines in the stamping workshop; frequency conversion device in paint shop; The automatic production line of the final assembly workshop, etc., these impact and nonlinear loads have a common feature, that is, the load fluctuation is very large, and the harmonic generation is very large.

The vast majority of spot welding equipment in the automotive industry uses 380V power supply, powered by two phases (L1-L2, L2-L3 or L3-L1), and the zero-sequence current needs to be considered for imbalance compensation due to three-phase imbalance.

Detailed solutions for the automotive industry: the automotive industry uses a large number of impact, non-linear loads in the main production processes, such as electric welding machines and laser welding machines in the body shop; Stamping machines in the stamping workshop; frequency conversion device in paint shop; The automatic production line of the final assembly workshop, etc., these impact and nonlinear loads have a common feature, that is, the load fluctuation is very large, and the harmonic generation is very large.

The vast majority of spot welding equipment in the automotive industry uses 380V power supply, powered by two phases (L1-L2, L2-L3 or L3-L1), and the zero-sequence current needs to be considered for imbalance compensation due to three-phase imbalance.

User value of reactive power compensation and harmonic governance

Reduce the influence of harmonics, avoid various faults such as voltage amplification caused by harmonics damaging electrical equipment, and improve power supply security.

Control harmonics, reduce the harmonic current injected into the system, and meet the requirements of national standards;

Dynamic compensation of reactive power, power factor up to standard, avoid fines from power supply companies;

After reactive power compensation, the system power supply current is reduced, and the capacity utilization rate of transformers and cables is improved;

Energy saving and consumption reduction.

Problems you may be experiencing?

1. The total harmonic distortion rate of the voltage of the 0.4kV low-voltage power supply and distribution system seriously exceeds the standard, and there is serious harmonic power loss in the electrical equipment and transformer.

2. The natural power factor on the 0.4kV side is low, and there is serious three-phase imbalance and reactive power impact phenomenon.

3. The conventional reactive power compensation device has problems such as large dynamic response time and poor switching compensation accuracy, which leads to long-term problems such as over-compensation and under-compensation of low-voltage busbars.

Our Solutions:

1. ESBELb passive filtering device is used to filter out the characteristic harmonics of the system, while compensating the reactive power, and the switching switch adopts thyristor switch to meet the requirements of rapid load change;

2. The dynamic safety compensation device ESBEL AHPF adopts the three-phase co-compensation and sub-compensation mixed compensation method to meet the compensation requirements of the three-phase imbalance of the system;

3. The ESBELtsm dynamic reactive power generator is used to provide reactive power to each phase of the system in the dynamic form, and at the same time control the harmonics of the system;

4. Through the mixed use of active filter BLUEWAVE and dynamic safety compensation device MVTS, it can solve the harmonic influence of the power distribution system in the automobile manufacturing industry, reduce the system loss, and make the power distribution system operate safely and efficiently, especially for users with very high requirements for electricity safety.