CAJ | 학술논문

随着广域测量系统的广泛运用,出现了利用相轨迹几何特征在线判别电力系统暂态稳定性的方法,针对这些方法依赖于分群结果的缺点,该文提出了一种基于功角空间降维变换的相轨迹判稳方法.首先对系统的功角运动轨迹在功角空间中进行降维变换,将轨迹投影为一维坐标轴上的运动,分析了其物理意义;基于这种降维变换后的运动参数,构成新的相平面,并在数学推导证明的基础上利用新的相轨迹凹凸性来判断系统的暂态稳定性.对新英格兰10机39节点系统的仿真实验证明了所提方法的有效性,并指出该方法比普通的分群后直接构成相平面的方法更优越.
수착엄역측량계통적엄범운용,출현료이용상궤적궤하특정재선판별전력계통잠태은정성적방법,침대저사방법의뢰우분군결과적결점,해문제출료일충기우공각공간강유변환적상궤적판은방법.수선대계통적공각운동궤적재공각공간중진행강유변환,장궤적투영위일유좌표축상적운동,분석료기물리의의;기우저충강유변환후적운동삼수,구성신적상평면,병재수학추도증명적기출상이용신적상궤적요철성래판단계통적잠태은정성.대신영격란10궤39절점계통적방진실험증명료소제방법적유효성,병지출해방법비보통적분군후직접구성상평면적방법경우월.
With the widespread deployment of wide area measurement system, the method for online identifying power system transient instability according to geometric features of trajectory in phase plane was proposed. The disadvantage of the method is that it is dependent on the clustering results of generators. Given this fact, a transient stability detection method using the trajectory in phase plane obtained by dimension reduction of power angles in power-angle space was proposed. After the dimension of the power angle trajectory was reduced in power-angle space, and the trajectory was projected in a one-dimensional coordinate axis, its physical significance was analyzed. Based on the motion parameters obtained by dimension reduction, a new phase plane was formed. By mathematical deduction, it is proved that the transient stability can be judged by the convexity of trajectory in the new phase plane. To demonstrate the effectiveness of this method, the simulation results of the New England 39-bus system were presented. It was shown that this method is better than the method using trajectory in phase plane based on the clustering results of the generators.