| 1. | Commutation failure factors analysis in hvdc transmission system
直流输电系统中逆变器换相失败的因素分析 |
| 2. | Analysis and definition of dc side harmonic performance of hvdc transmission systems
Hvdc传输系统的直流侧谐波性能的分析和定义 |
| 3. | Guide for analysis and definition of dc side harmonic performance of hvdc transmission systems
Hvdc传输系统的直流侧谐波性能的分析和定义指南 |
| 4. | Analysis of ground surface potential distribution under single - pole operation mode of hvdc transmission lines on special soils
输电线路单极模式运行时的地表电位计算 |
| 5. | This paper discusses the research of ultra hvdc transmission ' s reliability from the system design principle , control levels arrangement and protection areas
为提高特高压直流输电控制保护系统的可靠性，从系统整体设计原则、直流控制分层、直流保护分区等方面提出了具体方案。 |
| 6. | Built at a cost of $ 900 million on behalf of state grid corporation , china ' s longest hvdc transmission link delivers much - needed power from the three gorges hydropower plant in central china to the coastal megacity of shanghai
由中国国家电网公司投资9亿美元建造的这条中国最长的hvdc传输线，从三峡水电站向中国的沿海城市上海输送着大量需要的电力。 |
| 7. | With the increased use of hvdc transmission systems in power systems , situations have arisen and will be even more frequent in the future , where sigle - infeed hvdc system with a parallel ac line and several hvdc systems are located in close of each other
随着hvdc输电系统在电力系统中投入越来越多，交直流并联系统和多馈入hvdc系统正在逐渐增多。在这种情况下，交流系统和直流系统，不同的hvdc系统间都将存在相互作用。 |
| 8. | The correlative items of dc filters are researched on the basis of gezhouba - shanghai hvdc transmission project . in the analysis the three - pulse model is used to simulate converter , which takes into account the impact of the stray capacitance . the harmonics distribution on dc lines is simulated accurately , especially the harmonic ignored in old models
本文以葛上直流输电工程为基础，研究直流滤波器设计中的相关问题，采用考虑了杂散电容的三脉动模型来建立换流站模型，更为准确地模拟出直流输电线路上的谐波分布情况，尤其是模拟出旧模型中忽略的次（为自然数）谐波，为直流滤波器的设计提供了更精确的数据和判断依据。 |
| 9. | Hvdc transmission systems are a typical nonlinear and time - varying control systems , which poses difficult control problems and complicated control strategies . pi controllers are traditionally used in hvdc system . although these controllers have been operating satisfactorily for many years , the results are not perfect
虽然它们具有一定的适应性，但对于高压交、直流输电系统这样一个典型的强非线性、时变系统来说，其控制效果并不是很理想，往往不能满足性能要求。 |
| 10. | According to the practice on gezhouba to shanghai hvdc transmission project and in consideration of condition on three gorges hvdc project , some suggestions on protection of overvoltage and insulation coordination for outer insulation , against pollution - wet , dc neutral bus over - voltage and dc & ac filter are technically presented . it may be a reference in design of three gorges converter station
根据葛南直流工程的经验并结合三峡工程的情况，在换流站的外绝缘、直流耐污湿技术、直流中性母线过电压防护、交直流滤波器的过电压防护等方面提出了过电压和绝缘配合的技术要求，供设计参考。 |
