论文部分内容阅读
电气化铁路作为电力系统的一个特殊用户,其负荷具有非线性、不对称和波动性的特点,可能威胁电力系统的安全运行。本文介绍牵引负荷在电力系统中引起的负序电流对电力系统的影响及降低和限制负序电流的措施;从工程和经济两个角度说明了不平衡谐波对电力系统的危害,并提出了一些应对措施;针对电铁负荷功率因数较低的现象,分析了无功补偿的必要性以及目前存在的问题和解决措施。通过分析表明可以把电铁对电力系统的影响降到最低。
As a special user of power system, the electrified railway has the characteristics of non-linear, asymmetric and fluctuating loads, which may threaten the safe operation of power system. This paper describes the traction load in the power system caused by the negative sequence current on the power system and reduce and limit the negative sequence current measures; from two perspectives of engineering and economics illustrate the imbalance of harmonics on the power system and proposed Some countermeasures; aiming at the phenomenon of low power factor of electrified railway load, the necessity of reactive power compensation and the existing problems and solutions are analyzed. The analysis shows that it is possible to minimize the impact of electric iron on the power system.