| 1. | Study of voltage stability region of power systems subject to serious load disturbance
功率大扰动下电压稳定域的研究 |
| 2. | Influence of dc system control modes on voltage and power recovery after large disturbance in hybrid ac dc systems
直流系统控制方式对大扰动后交直流混合系统电压和功率恢复的影响 |
| 3. | The sensitivity of the state variables of the differential equations under larger disturbance at any time can be obtained by using the method proposed in this paper
本文提出的灵敏度分析方法能够得出大扰动下非线性微分方程组状态变量解在任意时刻的灵敏度。 |
| 4. | 3 . simulation of dynamic voltage stability of the ( composite ) induction motor load in the context of large disturbances and analyses of the simulation results with their load characteristics
3 .对大扰动下感应电动机(综合)负荷的动态电压稳定性进行了仿真,并运用其负荷特性对仿真结果进行了分析。 |
| 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. | 4 . simulation and comparisons of the dynamic voltage stability of constant impedance load , constant current load and constant power load in the context of large disturbances , and analyses of the simulation results with their load characteristics
4 .对大扰动下恒阻抗,恒电流,恒功率负荷的动态电压稳定性进行了仿真比较,并运用其负荷特性对仿真结果进行了分析。 |
| 7. | 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。 |
| 8. | This thesis carries out studies around the impact of load characteristics on voltage stability - the key problem of power system voltage stability analysis . the impact of load characteristics on static voltage stability is analyzed with the methods based on v - p - and - v - q curves , and the dynamic voltage stability of different loads in the context of both small disturbances and large disturbances is studied with the method of time domain simulation
本文围绕电力系统电压稳定性分析中的关键问题-负荷特性对电压稳定性的影响这一问题展开研究,采用v - p , v - q曲线分析法分析了负荷特性对静态电压稳定性的影响,并采用时域仿真法研究了大扰动和小扰动下负荷的动态电压稳定性。 |
| 9. | In order to resolve the question , in the thesis a simulation arithmetic of hydro - electrical system is put up . the equations of hydro - electrical system are divided to two parts , one of which consists of the differential equations of conduit system , hydro turbine and generator ' s rotator and is solved by characteristic equation arithmetic , the other of which consists of the differential equations of generator , magnetic system and grid and is solved by longge - kuta arithmetic or covert integrated arithmetic . through the alternative solving of the two parts , the simulation results of the large - disturbance transient could be abstained eventually
为解决这一问题，本文提出了一种将水力系统和电力系统方程交替求解的水电系统联合仿真算法，即将包括输水系统、水轮机以及机组转子等部分的水力系统差分方程作为一部分，将包括同步发电机、励磁系统以及电网等部分的电力系统微分方程或差分方程作为另一郑州大学工学硕士论文部分，对前一部分采用特征线法求解，对后一部分根据模型形式采用龙格一库塔法或隐式积分法等算法求解，这两部分的求解过程交替进行，最终即可得到水电系统大扰动过程的仿真结果。 |
| 10. | The stability and bifurcation condition of rotor system are obtained and the way to improve system stability and reduce the vibration amplitude through adjusting system parameters is indicated ; 3 ) the strong nonlinear dynamic characteristic of high - speed rotor system is studied . the movement trend of system and the effect of system parameters to dynamic characteristic are indicated . the deference of the strong / weak nonlinear system and the unique characteristic of the strong soft - nonlinear system are pointed out ; 4 ) the bifurcation behavior of nonlinear rotor system is studied and the parameter region when chaos phenomenon is appeared is obtained in bifurcation and chaos theory
研究了系统的稳定性条件和发生分岔的条件，提出了通过改变参数来提高系统稳定性和抑制振幅的方法； 3 ）运用强非线性理论研究了轻型高速转子系统在大扰动条件下的强非线性主共振和1 / 3亚谐共振的动力学特性，给出在强非线性条件下系统的运动趋势和系统参数对系统动力学特性的影响，并进一步指出强/弱非线性系统、软/硬非线性系统的区别以及强软非线性系统的独有特性。 |
