A preventive control model for static voltage stability and thermal stability based on power transfer capabilities of weak branches

作者：Yan Wei^*; Hu Xiuqiong; Yu Juan; Li Wenyuan

来源：WSEAS Transactions on Circuits and Systems, 2011, 10(5): 147-156.

• Apparent power
• Optimal model
• Preventive control
• Static voltage stability
• Weak branch

A preventive control model for static voltage stability and thermal stability ispresented using the apparent power constraints on weak branches as both static voltage stability constraints and thermal stability constraints. Firstly, a localized line-based voltage stability index is selected to determine the weak branches as well as their power transfer capabilities and the critical contingencies. A static security analysis method, whichis based on PQ decouple method, is adopted to obtain the quadratic apparent power expressions of weak branches following each critical contingency. Then, the apparent power constraints on weak branches are established combining the power transfer capabilities and theapparent power expressions of weak branches. The proposed preventive control model has a quadratic form and can be solved by the predictor-corrector primal dual interior method. The simulation results for three IEEE test systems demonstrate the correctness and effectiveness of the proposed preventive control model.

• 出版日期2011