论文标题
低频振荡的最佳功率流时间表
Optimal Power Flow Schedules with Reduced Low-Frequency Oscillations
论文作者
论文摘要
电网对小事件或持续的随机干扰的动态响应会影响其稳定的操作。由于阻尼不足，低频区域间振荡特别关注。本文研究了操作点对功率网络线性时间不变动力学的影响。提出了基于网格动力学频率响应的相关度量，以量化电力系统针对区域间振荡的稳定性。我们进一步提出了最佳的功率流式公式，以产生优化这种新型稳定度量的网格调度。使用半决赛计划（SDP）放松来产生可计算障碍的凸问题。 IEEE-39总线系统上的数值测试表明，SDP弛豫是确切的，可以产生等级-1解决方案。还研究了所提出的小信号稳定性度量与发电成本的相对权衡。
The dynamic response of power grids to small events or persistent stochastic disturbances influences their stable operation. Low-frequency inter-area oscillations are of particular concern due to insufficient damping. This paper studies the effect of the operating point on the linear time-invariant dynamics of power networks. A pertinent metric based on the frequency response of grid dynamics is proposed to quantify power system's stability against inter-area oscillations. We further put forth an optimal power flow formulation to yield a grid dispatch that optimizes this novel stability metric. A semidefinite program (SDP) relaxation is employed to yield a computationally tractable convex problem. Numerical tests on the IEEE-39 bus system demonstrate that the SDP relaxation is exact yielding a rank-1 solution. The relative trade-off of the proposed small-signal stability metric versus the generation cost is also studied.
