直流输电系统对交流变压器影响的研究

Studying on the effect to transformer by DC power transmission system

直流输电由于其具有输送容量大、损耗小、不受系统稳定性限制等特点,在我国得到越来越广泛应用。但是,交、直流混合输电系统会在交流变压器中性点产生直流电流,造成变压器绕组直流偏磁影响变压器和整个系统的正常运行,并对不同结构变压器产生影响的程度也不尽相同,因此,必须对变压器中性点直流电流进行有效的检测和抑制。就直流输电系统产生后交、直流系统中交流变压器中性点直流电流的相关问题,进行了理论分析,希望对变压器的运行维护有所帮助。

In our country,DC transmission is applied more and more abroad because of the characteristic,such as the big capability,the little wastage and unlimited transportation by stabilization.But the AC and DC transmission system brings DC current in neuter spot of transformer, it will affect the natural running of transformer and whole power system, and the effect to transfomer is different with different configuration,so it is necessary to messure and restrain the DC current in neuter spot of transformer.In the article,the author analyses theoretically some correlative questions about DC current in neuter spot of transformer after the application of DC power transmission system, and hopes that the article is useful to the running and maintenance of transformer.