Potential Energy Boundary Surface Method For Increasing Transient Stability Assessment Efficiency
Lü Zhilai,Zhang Baohui,Ha Hengxu
(Xi'an Jiaotong University, Xi'an 710049, China)

Abstract: A new control criterion is presented for the conventional time domain simulation by using the extended potential energy boundary surface method. Restrictive conditions are introduced for the devel opment of a quantitative judgement method of power system transient stability by time domain simulation.The method provides stability or instability criterion based on trajectory analysis such that it applies to all power system models. The draw back of numerical simulation is that a proper criterion could not be offered for stopping the simulation process. It is overcome by the present method, which has been successfully demonstrated for the 6-machine 22 buses Chinese EPRI system and a realistic northwest China system(46 machines and 230 buses).Higher analysis accuracy and efficiency of numerical simulation have been achieved.It is a valuable method for transient stability analysis.
Keywords: power system;transient stability;numerical integral;potential energy boundary surface