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发明公开
CN104578118A 一种低压电网的可控零序补偿器 无效 - 驳回

一种低压电网的可控零序补偿器
摘要：
本申请提供了一种低压电网的可控零序补偿器，包括与低压电网相连接的曲折变压器和输出端的一端与该曲折变压器的中性线相连接的单相逆变器，单相逆变器的输出端的另一端用于连接低压电网中性线；单相逆变器用于根据曲折变压器的中性线的电流、低压电网的中性线的电流、和负荷的中性线的电流向低压电网的中性线输出补偿电流。本申请的技术方案能够使零序电流在曲折变压器、单相逆变器与负荷之间形成环路，这就会使低压电网的中性线的电流降到零，从而完成对低压电网的零序电流的补偿，进而解决低压电网的三相不平衡问题。
摘要（英）：

The invention provides a controllable zero sequence compensator of a low-voltage power grid. The controllable zero sequence compensator comprises a zigzag transformer and a single-phase inverter, wherein the zigzag transformer is connected with the low-voltage power grid, one end of the output end of the single-phase inverter is connected with the neutral line of the zigzag transformer, the other end of the output end of the single-phase inverter is used for being connected with the neutral line of the low-voltage power grid, and the single-phase inverter is used for outputting compensation currents to the neutral line of the low-voltage power grid according to the currents of the neutral line of the zigzag transformer, the currents of the neutral line of the low-voltage power grid and the currents of the neutral line of a load. By the controllable zero sequence compensator, zero sequence currents form a loop among the zigzag transformer, the single-phase inverter and the load, the currents of the neutral line of the low-voltage power grid is allowed to drop to zero, compensation of the zero sequence currents of the low-voltage power grid is completed, and the three-phase unbalance problem of the low-voltage power grid is solved.

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