Unbalanced Load - Meaning, Cause and Solution

1. the meaning of unbalanced load.

First of all, unbalanced load refers to the three-phase power system in the current or voltage inconsistency. Commonly known as the equipment unit operation is not balanced. Can also be understood as a three-phase circuit in the three-load current is not equal or not 120 degrees, any two phases of the circuit current is not equal.

2. the causes of unbalanced load phenomenon.

1, uneven distribution of power consumption between electrical equipment.

2, the load impedance is different. Different resistance is generally due to cable length, wire size differences or equipment resistance changes.

3, Harmonics. Harmonics generated by non-linear loads and other factors can also lead to unbalanced loads now occur.

4, three-phase power system wiring produced by the improper current and voltage differences can also appear unbalanced load phenomenon.

5, external interference. There are many uncontrollable situations in the use of the environment. For example, the interaction of other electrical appliances, or the natural environment generated by the magnetic field factor.

3. the solution to the unbalanced load.

1, the use of balancing transformers.

Balance transformer is a professional solution to the problem of unbalanced load professional equipment, but also the optimal way to solve the unbalanced load. Can go to the electrical store to buy. It can balance the current between the three phases, weaken the external and internal effects, such as autotransformers.

2, use reactive power compensator.

Reactive power compensators can improve the power factor of the grid, reduce the losses of the transformer and transportation lines, and effectively solve the problem of three-phase unbalanced loads. For example, shunt capacitors and static reactive power compensators can realize the even distribution of current.

3, the use of intelligent control system

With the development of smart grid technology, intelligent monitoring, intelligent prediction, and big data systems are gradually optimized, through modern technology can monitor the three-phase imbalance phenomenon of electricity 24 hours a day, and can predict future changes and make timely adjustments.