Weak power system

Discussion of Transmission Line Protection Scheme for Weak Power Source System

弱电源系统的输电线路保护方案的探讨

The results showed that the amplitude and the frequency of a continuing system natural oscillation frequency with the same or similar single periodic disturbance can lead to continued weak damping power system oscillations contact line .

研究表明，具有持续振幅且频率与系统固有振荡频率相同或相近的周期性扰动可引发弱阻尼系统联络线上持续的功率振荡。

When the transmission line exists in weak power source system and the internal fault occurs on the line , the protection relays can not operate quickly to isolate the fault line , as the relay fixed at weak power source can not provide enough fault current to startup .

输电线路存在弱电源系统，线路发生区内故障，由于弱电源侧系统不能提供足够的短路电流而不能启动保护，导致两侧保护不能快速跳闸甚至拒动。

Analysis and Visualization for the Voltage Stability Weak Area in Power System

电力系统电压稳定弱区域分析及其可视化

By means of various inference modes , the weak elements of power system can be readily identified .

贝叶斯网络的推理模式多样，可以有效地识别电力系统可靠性的薄弱环节。

By analyzing the algorithm 's capability for handling inequality constraints and the algorithm 's accuracy , it shows that this algorithm can improve calculation speed and identify weak spots of power system , which is similar to interior point method .

理论分析了该算法对不等式约束的处理方法及其精度和特性，发现该方法不但能提高计算速度，识别系统薄弱环节，而且具有内点法的特征。

A new nodal static voltage stability index in which the load fluctuation can be considered is proposed . This index can reflect the probability of node static voltage collapse , and then the weak node of power system can be identified .

提出了一种可以考虑负荷波动的节点静态电压稳定指标，该指标可以表示节点静态电压崩溃的概率，进而识别出系统的薄弱节点。

Weak laser power detection system , which can detect weak laser power quickly and accurately , is a kind of precise instrument in judging Laser signal transmission attenuation and loss , and play an important role in optical fiber communication engineering , related scientific experiments and teaching .

微弱激光功率检测系统最大的特点在于快速精确地检测微弱激光功率，用于测量激光信号传输衰减与损耗，在当代高速发展的光纤通信工程及相关科学实验和教学中起着重要的作用。

The stability of the weak coupled core power adjustment system was investigated .

对两个弱耦合堆芯的功率调节系统的稳定性作了分析研究。

And then , by further analysis of the results of risk assessment , the weak places of Guangdong power system are found out and some countermeasures to eliminating the weak places are put forward .

然后，通过对风险评估结果的进一步分析，挖掘出广东省电力系统的薄弱环节，并提出了相应的改善对策。

This technique is tested on the IEEE system and the results prove that the technique can rapidly estimate the maximum loadability of each bus and find the weak bus in a power system .

最后使用IEEE系统对其检验，结果证明所提出的方法能够快速估算各负荷母线的最大承载能力，找到电力系统中薄弱母线。

The example testified the Markov property of the power system state transition and the effectiveness of this research . ( 4 ) Weak parts of a power system can be recognized using sensitivity analysis , which has been an important technique for system reliability assessment and enhancement .

相关算例验证了电力系统状态转移的马尔科夫特性，表明了本研究的有效性。（4）对电力系统进行可靠性灵敏度分析可以辨识系统中的薄弱环节，对改善系统可靠性具有重要意义。