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为了消除不平衡和非线性负载在配电系统中性线上引起的零序电流,提出了一种利用曲折移相电抗器与阻零器相结合的零序谐波电流治理方案。通过对各种运行方式下的仿真和实验表明,曲折移相电抗器和阻零器的结合能在各种系统状况下有效滤除零序谐波电流。其结构简单,不受系统参数的影响,滤波效果明显,能显著改善电能质量,提高负荷的供电可靠性。
In order to eliminate the zero-sequence current caused by imbalance and non-linear load in the neutral line of power distribution system, a novel zero-sequence harmonic current control scheme using zigzag phase-shifting reactor and zero-stop resistor is proposed. The simulation and experiment under various operating modes show that the combination of zigzag phase shifter and dampers can effectively eliminate the zero sequence harmonic current under various system conditions. Its structure is simple, not affected by the system parameters, filtering effect is obvious, can significantly improve power quality, improve the reliability of the load power supply.