一种快速确定暂态稳定域的直接法研究

A Fast Direct Method of Determing Transient Stable Domain

Bised on the specific featdres of Chinese power networks, a direct method of finding the unsable equilibrium point by using the fault factors is proposed, with which the transient stable domain con be fast determined and the critical clear times are calculated. Because three Liapunov functions are calculated simulnaneously, the shortcoming of Liapunov fuctions has been partly overcome. In comparison with the classical direct methods and transient potential energy boundary surface(PEBS) method, the results obtained are moreaccurate and the time of calculation is shorter. The tests in many real power systems show the this method is valid and can be used for the plan ning and design of electric systenand on-line transient stabilijy analysises.