Optimal power flow schedules with reduced low-frequency oscillations
Optimal power flow schedules with reduced low-frequency oscillations
复制标题
减少低频振荡的最佳潮流方案
DOI：
10.1016/j.epsr.2022.108301
复制
发表时间：
2022
影响因子：
3.9
通讯作者：
Kekatos, Vassilis
中科院分区：
文献类型：
--
作者：
Singh, Manish K.;Kekatos, Vassilis
电网对小事件或持续随机扰动的动态响应影响其稳定运行。由于阻尼不足，低频区域间振荡特别令人关切。本文研究了运行点对电力网络线性时不变动态特性的影响。提出了一种基于电网动态频率响应的电力系统区域间振荡稳定性度量方法。我们进一步提出了一个最优潮流公式，以产生一个电网调度，优化这个新的稳定性指标。一个半定规划（SDP）松弛产生一个计算易处理的凸问题。IEEE-39节点系统的数值试验表明，SDP松弛是精确的，产生一个秩-1的解决方案。提出的小信号稳定性度量与发电成本的相对权衡也进行了研究。
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.