提高暂态稳定计算效率的势能界面法

在拓广经典势能界面法的基础上，引进一些约束条件，为详细数学模型数值积分提供了一种控制仿真进程的判据。对中国电力科学研究院６机２２节点系统和西北电网实际系统进行了仿真。结果表明，该判据除临界状态左右具有保守性外，其他情况判据合理可靠，满足工程精度要求。同时，该方法克服了数值积分的一大缺点，即没有控制仿真进程的手段，只能通过长时间的积分并经过人眼观察才能得到是否稳定的结果，大大提高了数值积分的计算效率

Potential Energy Boundary Surface Method For Increasing Transient Stability Assessment Efficiency

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 development 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 drawback 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.