| 1. | This equipment is not satisfied with the requestment of reactive power and the improvement of power factor
研制一种适应牵引负荷特点的新型综合补偿装置具有重要的经济意义。 |
| 2. | At present , the electrical railway traction load in our country has great influence on power factor , negative sequence and hypo _ harmonics
电力牵引负荷对电力系统的影响主要反映在功率因数、负序及高次谐波。 |
| 3. | At present , low power factor , abundant harmonics and negative sequence are the three main characters of electrical railway traction load
功率因数低、谐波含量大和不对称性是现代电力牵引负荷的三大技术特点。 |
| 4. | On the basis of former research , drawing software neharpal . 0 is developed to analyze the negative phase sequence and harmonic of electric traction loads . neharpal
在既有成果的基础上，开发了一套主要应用于电气化铁道牵引负荷负序、谐波渗透分析的电网图形系统仿真软件neharpa1 . 0 。 |
| 5. | Many experts and researchers have made great efforts in a long time . this paper is from the study of theory , analysis the particularity of electrical tractor loads
本文从理论探讨的角度出发，深入了解了国内外对电牵引系统多谐波源随机谐波电流叠加问题的动态，分析了电牵引负荷谐波的分布特性。 |
| 6. | The power supply & transmit electricity system in guangyuan fulfilled the role of supplying main power to guangyuan city . while the harmonic occurred is very serious and it has not been restrainted . the main harmonic sources are two loads : aluminium electrolysed load and electrized locomotive load
广元电力网主要担负着广元市、县工农业及人民日常生活用电任务，但其谐波极其严重，并且没有进行治理，其主要谐波源负荷为电解铝整流负荷和电气机车牵引负荷。 |
| 7. | It is discussed that the present harmonic analyzers do n ' t satisfy the requirements of china standard for harmonic measure of quick disturbance harmonic load . the measurement error brought about by the harmonic analyzers adopting ft or fft algorithm is analyzed . a cycle discrete fourier algorithm that should n ' t be effected by aperiodic component is presented , and the results of simulation show that it has higher accureacy
本文对电力系统谐波的测量方法，数据处理及电力牵引负荷对电力系统的影响进行了研究，论述了目前国内外生产的谐波分析仪用于快速波动谐波负荷的测量不满足国标的要求，分析了谐波分析仪普遍采用的ft或fft算法所产生的测量误差，提出了一种不受非周期分量影响的全周波离散傅里叶算法，仿真结果表明精度好。 |
| 8. | It satisfies the requirements of china standard ( gb / t 14549 - 93 ) , the harmonic and negative sequence component leaded by the input of electrified railways traction load are measured in si yan qiao substation . this thesis mainly analyzes the effects on the electric elements , feeding system losses , protection system and automatic device , and proposes corresponding schemes according to the problems occurring in si yan qiao substation
本文实测了泸州石燕桥变电站电气化铁路牵引负荷注入电网的谐波和负序分量，着重分析了电力系统中电气设备、供电网线损、继电保护和自动装置受电气化铁路谐波和负序的影响，并针对石燕桥变电站出现的问题提出了对策。 |
| 9. | As a result , this paper gives a corresponding harmonic prevent me asure . finally , according to the asymmetrical characteristics of electrical traction loads , this paper studies the negative sequence currents under different loads and makes a piece of advice for reducing the negative sequence currents produced
最后，还根据电力牵引负荷三相不对称的特点，分析了阻抗匹配平衡变压器在不同负荷条件下的负序电流，对如何减小电力牵引负荷的负序电流提出了一点建议。 |
| 10. | Now the affect and the measure of hypo _ harmonics is in the research . the influence of negative sequence is almost eliminated along with the enlargement of the system ' s capacity and the alternate connection of traction substations . the fixed parallel compensate equipment applied in traction substations consist of a constant capacitor and a constant inductance , so its output is constant
负序电流的问题已经因系统容量的增大、牵引变电所采用轮换接线方式而基本解决，电力部门实行的“反转正计” ，使采用对无功功率固定补偿方式由于牵引负荷变化频繁而出现补偿容量不足或过补偿现象，难以达到满意效果。 |
