An approach to determining the local boundaries of voltage stability region with wind farms in power injection space  

作　　者：MU YunFei & JIA HongJie Key Laboratory of Power System Simulation and Control of Ministry of Education, Tianjin University, Tianjin 300072, China 

出　　处：《Science China(Technological Sciences)》2010年第12期3232-3240,共9页中国科学（技术科学英文版）

基　　金：supported by National Natural Science Foundation of China (Grant No. 50707019);Special Fund of the National Basic Research Program of China ("973" Program) (Grant Nos. 2009CB219701, 2010CB234600);Tianjin Municipal Science and Technology Development Program (Grant No. 09JCZDJC25000);Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20090032110064)

摘　　要：A new approach to determining the local boundaries of voltage stability region in power injection space (IVSR) for power system with wind farms is presented. It can be used for power system voltage stability analysis and on-line security assessment with considering the output uncertainty of the wind farms. Firstly, power flow tracing and double dispatching are used to determine the generators that are closely related to the wind farms, in order to balance the power fluctuations caused by the wind speed variation. Then, modal analysis is used to get the key generators to achieve an effective dimension reduction for IVSR. Finally, the forecasting output power (or wind speed) of wind farms is divided into several intervals. For each interval, the corresponding local IVSR boundaries can be calculated by the method based on small disturbance. Moreover, parallel process is used to accelerate the computing speed. The presented approach is validated by several power systems. It can be revealed that the approach can give the local IVSR boundaries at different wind speeds and has a good engineering application prospect.A new approach to determining the local boundaries of voltage stability region in power injection space (IVSR) for power system with wind farms is presented. It can be used for power system voltage stability analysis and on-line security assessment with considering the output uncertainty of the wind farms. Firstly, power flow tracing and double dispatching are used to determine the generators that are closely related to the wind farms, in order to balance the power fluctuations caused by the wind speed variation. Then, modal analysis is used to get the key generators to achieve an effective dimension reduction for IVSR. Finally, the forecasting output power (or wind speed) of wind farms is divided into several intervals. For each interval, the corresponding local IVSR boundaries can be calculated by the method based on small disturbance. Moreover, parallel process is used to accelerate the computing speed. The presented approach is validated by several power systems. It can be revealed that the approach can give the local IVSR boundaries at different wind speeds and has a good engineering application prospect.

关 键 词：VOLTAGE stability region POWER flow TRACING MODAL analysis parallel process 

分 类 号：TM614[电气工程—电力系统及自动化]