| 1. | In this paper , a coordinated recovery strategy for multi - infeed hvdc system is proposed
提出了一种针对多馈入直流输电系统的协调恢复控制策略。 |
| 2. | A method based on the eigenvalue decomposition technique , known as modal analysis of multi - infeed hvdc systems
最近，一种基于特征值分解技术的模态分析方法，已用于交直流混合系统的电压稳定性分析中。 |
| 3. | For multi - infeed hvdc systems , when the minimum eigenvalue of the system becomes zero , the voltage stability graph can be plotted effective short circuit ratio as function of coupling impedance
对于多馈入hvdc系统，在最小特征值为零的情况下，可以根据这种关系作出有效短路比?连接阻抗图，即电压稳定图。 |
| 4. | The simulation results show that , with the proposed coordinated recovery strategy implemented , the recovery performance of the tested multi - infeed hvdc system has been improved a lot when compared with the conventional control strategy "
该方法更注重直流系统两端控制间的协调，更注重在直流系统恢复期间对其换流母线电压的维持。 |
| 5. | Based on differential geometric theory , a novel nonlinear modulation strategy for multi - iii infeed hvdc systems to enhance the transient stability of ac system in the presence of large disturbances is presented in this paper
针对大扰动情形，提出了一种用于改善多机交直流混合电力系统(有多条直流线路落点于其中)暂态稳定性的非线性调制策略。 |
| 6. | This dissertation proposes a new approach to nonlinear active and reactive power modulation control design for multi - infeed hvdc systems , which realizes the emergency power support to ac system in the presence of large disturbances occurred in ac system
将己有的基于线性方法的有功及无功调制策略由单馈入直流输电系统推广至多馈入直流输电系统，并提出一种非线性的有功及无功调制方法。 |
| 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. | This dissertation focuses on the application of the fast controllability of hvdc systems to realize emergency power support to its connected ac system in the presence of large disturbances occurred in ac system , and more emphasis is given to the control strategies concerned with multi - infeed hvdc systems
利用直流输电系统的快速可控性，实现对交流输电系统的紧急功率支援，其本质就是研究在大扰动发生后应对直流系统采取何种控制策略。 |
| 9. | I . e . strong coupling critical admittance and weak coupling critical admittance that affect the occurring conditions and types of commutation failures in multi - infeed hvdc system , are defined in this paper . factors which has great influence on the above two parameters , such as ac system strength
针对一个典型的多馈入直流输电系统，首次定义了影响多馈入直流输电系统中换相失败及其发生类型的两个重要参数，即强耦合临界导纳和弱耦合临界导纳。 |
