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Information Technology Journal

Year: 2014 | Volume: 13 | Issue: 16 | Page No.: 2626-2631
Research Article

Voltage Stability Margin’s Solution Using Nonlinear Programming Method Based on Dynamic Power Flow

Jin Xing
State Grid Jibei Electric Power Company Limited, Xicheng, Beijing, 100053, China
Jun Li
State Grid Jibei Electric Power Company Limited, Xicheng, Beijing, 100053, China
Zeping Gong
State Grid Jibei Electric Power Company Limited, Xicheng, Beijing, 100053, China
Voltage stability margin is an important index to evaluate the security and stability of power system. In view of voltage stability margin’s solution using normal nonlinear programming method did not consider the growth mode of generators’ active power outputs, the results of load margin are too ideal. A dynamic nonlinear programming method model which considered the growth mode of generators’ active power outputs was proposed in this study based on dynamic power flow. In the model, the unbalanced active power was distributed by the growth mode of generators’ active power outputs which is based on the actual situation. So, the results of load margin calculated by dynamic nonlinear programming method are more practical and not affected by the selection of slack node. Tests on IEEE-30 system and Liaoning power system show that results of voltage stability margin calculated by dynamic nonlinear programming method are more reasonable and practical than normal nonlinear programming method.
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