DC circuit topology

Abstract

The invention discloses a direct current circuit topology which comprises a load unit, a voltage conversion unit, a transformer, a first power distribution voltage end and a second power distributionvoltage end. The voltage conversion unit comprises four full-bridge circuits, a first diagonal point of each full-bridge circuit is connected with an independent winding at the primary side of the transformer, and all the independent windings share a magnetic core. The second diagonal points of all the full-bridge circuits are connected according to a preset wiring mode and then are connected withthe first power distribution voltage end and the second power distribution voltage end, so that the voltage between the second diagonal points of all the full-bridge circuits is 375V. The load unit is connected with a secondary side winding of the transformer. By adopting the above scheme, the direct current circuit topology can be applied to various power distribution scenes, at the same time, the power balance of the positive and negative buses of a voltage conversion part of the power distribution network is realized, the power distribution network does not need to build an additional power balance device or power capacity overdistribution, and the power distribution network construction cost is reduced.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a DC circuit topology. Background technique [0002] Nowadays, people are constantly looking for new energy sources to replace traditional energy sources. Therefore, distributed new energy sources have begun to be connected to the grid on a large scale. [0003] After the distributed new energy is connected to the grid, the distributed new energy needs to be connected to the AC grid through DC to AC, which greatly affects the local comprehensive consumption efficiency of the distributed new energy in the AC distribution network. Therefore, the existing technology The DC power distribution system is used in the system to solve the access of distributed new energy. [0004] However, the public low-voltage direct current distribution network generally adopts constant voltage control, and the electric energy distributed by the public low-voltage direct current distribution network is convert...

AI Technical Summary

Problems solved by technology

[0004] However, the public low-voltage DC distribution network generally adopts constant voltage control, and the electric energy distributed by the public low-voltage DC distribution network is converted into DC with a fixed voltage level to provide power for the load in the load side, so the voltage conversion part of the distribution network voltage terminal will be generated. The power of the positive and negative buses is unbalanced, and the adaptation to power distribution scenarios is limited

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