| 1. | Analysis on power supply mode of electric traction system and the effects of traction load on the quality of electric energy
电力牵引系统供电方式及其负荷对电能质量影响的分析研究 |
| 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. | 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。 |
| 6. | The characters of traction power supply system and the problems of routine designs in the electrify railroads are described in chapter two where two main methods of optimize design in former traction power supply systems are emphasized , which realize the optimize methods of traction power supply system by using network multiple address selecting technique , and based on traction load along line distributing function , furthermore construct the optimization mathematical model ' s optimize method of traction power supply system by means of mathematical planning method ' s application
优化设计是近年来发展起来的一项新技术，已经在工程设计的一些领域中得到了广泛应用。本文通过对优化设计技术在电气化铁路牵引供电系统应用这一课题进行研究，以期为牵引供电系统在实际工程设计中提供一种新的使用方法。通过分析电气化铁路牵引供电系统的特点和常规设计中存在的问题，阐述了牵引供电系统优化设计的两种主要方法。 |
| 7. | 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。 |
| 8. | Tangyin substation is an important substation which has two transformer of 120mva , eight 220kv lines and three 110kv lines . tangqian line is a 110kv line specially for traction transformer substation . because traction load is high - power nonlinear and asymmetry . it will produce much harmonic and negatvie sequence current , which have done harm to compensation capacitors of tangyin substation . in recent years , the tang6c capacitor often interrupted and in 2001 july the tang7c capacitor ' s discharge pt exploded
汤阴变电站是豫北一座枢纽变电站，有2台120mva的主变， 8条220kv线路和3条110kv线路，其中的汤牵线是专为牵引变电站供电的110kv线路。由于电力机车属于大功率的非线性负荷，且三相不对称，在其运行过程中必然会产生较大的高次谐波和负序电流。 |
| 9. | Considering the random fluctuation traction load ( from 0 to max , variable at every minute ) , the life limit of all kinds of machine switches and expensive cost and complex overhaul of svc , this paper aims to develop a set of svc suitable for the present condition of our country . in order to resolve the reactive power returning back problem and realize static adjustable compensation to improve negative sequence
本文针对电气化负荷变化频繁、 svc价格昂贵及检修复杂、机械开关无法担负频繁操作任务的现实，提出通过改造svc结构，把tcr改为tsr ，把tsc实现粗调、 tcr实现细调改为由tsc调节欠补无功、 tsr调节过补无功的技术方案。 |
| 10. | Because the harmonics in tangyin substation are primarily from electric traction loads , this paper gives the structures of several main locomotive models and general harmonics they produce . the harmonics produced by electric locomotive have a characteristic that their range and phase are both dispersive . this paper also analyzes the impedance - matching balance transformer ' s structure and harmonics injected into the power system at its primary side , and sums up the characteristics of the harmonics from electric traction loads in the tangyin traction substation
鉴于汤阴变电站的谐波主要来自电力牵引负荷，本文列举了电力机车几种主要车型的结构以及它们产生谐波的概况，得出了电力机车的各次谐波电流幅值和相角具有较大分散性的特点。针对汤阴牵引变电站的牵引变压器，分析了阻抗匹配平衡变压器的结构及其高压侧注入电网的谐波，推导了有关计算公式。通过理论分析并结合汤牵线的实测谐波数据，归纳了电力牵引负荷注入汤阴变电站的谐波的特点。 |
