Split type winding structure

Abstract

The invention discloses a split type winding structure, which realizes the balance of ampere turn between a primary winding and a secondary winding, prevents the windings from being damaged, reduces investment cost and reduces loss. The invention has the technical scheme that the split type winding structure comprises a first primary winding, a second primary winding and a secondary winding, wherein the first primary winding comprises the first part of the first primary winding and the second part of the first primary winding which are wound by layers and connected in series or in parallel, the second primary winding comprises the first part of the second primary winding and the second part of the second primary winding which are wound by layers and connected in series or in parallel, the secondary winding is wound at the outer side of the split type winding structure, and the first primary winding and the second primary winding are wound at the inner side of the split type winding structure.

Description

technical field [0001] The invention relates to a winding structure, in particular to a split winding structure. technical background [0002] In recent years, my country's renewable energy has developed rapidly, including wind power and solar power. Since the current capacity of solar power inverters is 630kW, each inverter needs to be equipped with a step-up transformer, especially the investment cost of high-voltage cables and corresponding high-voltage equipment on the 35kV side is greatly increased. At present, the existing split winding structure has axial split And radial splitting, axial splitting In the case of one of the primary windings being short-circuited, the winding is easily damaged due to the extreme imbalance of ampere-turns between the primary and secondary windings. However, the manufacturing cost of the radially split structure will be greatly increased, and the short-circuit impedances of the two primary windings corresponding to the secondary winding...

AI Technical Summary

Problems solved by technology

Since the current capacity of solar power inverters is 630kW, each inverter needs to be equipped with a step-up transformer, especially the investment cost of high-voltage cables and corresponding high-voltage equipment on the 35kV side is greatly increased. At present, the existing split winding structure has axial split And radial splitting, axial splitting In the case of one of the primary windings being short-circuited, due to the extreme imbalance of ampere turns between the primary and secondary windings, it is easy to cause winding damage

However, the manufacturing cost of the radial split structure will be greatly increased, and the short-circuit impedances of the two primary windings corresponding to the secondary windings are very different.

Therefore, neither of these two structures is very suitable, and this problem has become an important factor in the greatly increased investment costs

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