| 1. | The mechanism that induction motor losing stability can lead to voltage stability is confirmed by the analysis results of typical system and multi - machine system
典型系统和多机系统下的研究结果都表明，感应电动机的失稳可能导致系统电压崩溃。 |
| 2. | 5 . analyses of the internal relations and the essential differences among voltage instability , voltage collapse and load instability on the basis of the simulation results and their analyses
5 .在仿真结果及其分析的基础上,分析了电压失稳,电压崩溃与负荷失稳的内在联系和本质区别。 |
| 3. | Derived from the concept and character of the voltage collapse boundary surface , the discussion on the principles of the advancing analysis and the preventive control of the steady - state voltage stability of power system in this dissertation is illustrative , scientifical and precise
从电压崩溃边界曲面的概念与性质出发，论文提出了静态电压稳定的预测分析与预防控制新原理。 |
| 4. | For guangdong power grid , this paper states research significance of power system voltage stability , expounds the concept of voltage stability and voltage collapse , the analysis models and methods , gives some measures to prevent the damage of voltage instability
本文针对广东实际电网，论述了电力系统电压稳定问题研究意义，阐述了电压稳定及电压崩溃的概念、电压稳定的分析模型和方法，给出了防止发生电压稳定破坏的措施。 |
| 5. | With the development of the electric power system , static - state reactive power compensators ca n ' t have met the requirements of the actual production and operation , and the trend to the fast and dynamic compensation for reactive power become greater and greater . since ertan hydroplant and 500kv transmission systems in sichuan power system have been operated , many power plants of load center are forced to halt during the high - water period , because the great deal of power is transmitted to far - distance load center . thus the load center loses voltage sustentation and the level of the system stabilization is debased greatly
四川电网的二滩水电站和500kv输变电系统投入运行后，由于二滩水电站的大量电力远距离输送至负荷中心，迫使负荷中心的火电机组在丰水期大量停机，使负荷中心失去电压支撑，大大降低了电网的电压稳定水平；同时，因为四川电网中的无功补偿装置全为静态无功补偿电容器(或电抗器) ，这些设备只能在系统正常运行状态下起到无功补偿和电压支撑的作用，而在电网出现事故时，不但不能起到电压支撑作用，反而会促使电网电压崩溃事故的发生。 |
| 6. | In this dissertation , correlative research of longer - term voltage stability have been carried out , including some slow dynamic elements , such as on - load tap changer ( oltc ) , maximum excitation limiters ( mel ) , etc . the effects of these slow dynamic elements on the course of voltage instability or collapse are revealed from the point of view of time - domain simulation
本文基于pss e程序中的扩展动态仿真模块，对考虑有载调压变压器( oltc ) 、最大励磁限制器等慢动态元件的中长期电压稳定进行了相关的研究，从时域仿真的角度揭示这些慢动态元件在电压崩溃过程中所起的作用。 |
| 7. | 6 . presentation of the essential explanations of both voltage stability and the mechanism of voltage collapse , which hold : the essence of voltage stability is the balance between the power that loads absorb from the network to meet the requirements of energy conversion and the power that the network can actually supply
6 .给出了关于电压稳定性和电压崩溃机理作出了本质的解释,认为:电压稳定问题的本质是负荷为满足其能量转换的需要而要求从电网吸收的功率与电网实际所能供给的功率的平衡问题-即系统传输网络与系统负荷之间功率的供需平衡问题。 |
| 8. | But the mechanism of the voltage instability or collapse are still not at all clear as compare with that of the rotor angle instability . not only the relations of voltage instability to rotor angle stability have not established , but also the relatively intact analysis and control theory of voltage stability have not set up
但是，人们对电压失稳或者电压崩溃的机理尚不完全清楚，没有建立电压稳定和功角稳定关系的理论，也没有建立比较完整的电压稳定性分析和控制理论。 |
| 9. | The subject of voltage stability has become a hot research subject and an urgent question in electric power system . it includes exploring the mechanisms of voltage collapse , constructing a model that reflects real electric power system as possibly as it can and strengthening the researches of power system voltage stability and security
电压稳定性课题已成为热门的研究课题和电力系统迫切需要解决的问题，包括探索电压崩溃的机理、建立尽可能反映电力系统实际的数学模型，以及加强电力系统电压稳定性和安全性的研究。 |
| 10. | The sib of differential - algebra equation ( dae ) can be interpreted as one mechanism of transient voltage unstable or voltage collapse , and this mechanism is illustrated under multi - machine system . moreover , the algorithm for search sib point under multi - machine system is proposed . the study of dae model and its singularity - perturbed model shows that they are different in essence
微分-代数方程下的奇异诱导分岔可作为暂态电压崩溃的一种机理解释，在典型系统中详细地分析了该机理，并在多机系统中构造出相应的算例，此外还提出了在多机系统中计算奇异诱导分岔点的算法设想。 |
