标题：Analysis on the effect of rotor angle control for transient stability enhancement
作者：Wei, Qiang ;Guo, Weimin ;Han, Xueshan ;Li, Tianya ;Yang, Ming
作者机构：[Wei, Qiang ;Guo, Weimin ] Electric Power Research Institute of Henan, Electric Power Company, Zhengzhou, China;[Li, Tianya ] Queensland University of 更多
会议名称：2014 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2014
会议日期：12 October 2014 through 15 October 2014
来源：IEEE PES Innovative Smart Grid Technologies Conference Europe
关键词：dynamic braking; PMU; rotor angle control; transient stability
摘要：For the time being, the absolute rotor angle of every generator is changing from time to time, so it's less likely to improve transient stability by use of rotor angle measurement. Things are no longer so after absolute rotor angle controllers are deployed across the power system. The frequency of the power system will remain constant, and the absolute rotor angle of every generator will be kept at the aim value given by dispatching center most of the time. After fault happens, every generator can know its position in entire system through local PMU (phasor measurement unit) measurement. The angle controller can then give order to turbine valve or power electronic braking devices to accelerate or decelerate the generator rotor so that it comes back to its original position. Consequently, stability and order will be restored. The changing magnitude of turbine valve is restricted in the angle controller, so there is no damage to thermal system. Besides, valve operation and dynamic braking can be integrated seamlessly to get better results. Simulations results show that this principle can increase critical fault-clearing time and transient stability in both SMIB and multi machine system. © 2014 IEEE.