基于静态安全域的含新能源输电网随机最优潮流

Stochastic Optimal Power Flow in Transmission Grid with Renewable Energy Based on Steady-state Security Region

为应对新能源发电出力随机性对输电网最优潮流造成的显著影响,本文基于静态安全域构建一种便于处理的随机最优潮流模型。首先,本文基于交流潮流模型和灵敏度法推导出静态安全域的超平面表达式;其次,结合Cornish-Fisher级数构建随机最优潮流的机会约束模型;再次,提出一种启发式算法进行求解;最后,针对改进IEEE39输电网的仿真结果验证了所提方法能够在保证安全性的前提下快速处理功率不确定性。

To deal with the significant impact of stochastic power generation output from renewable energy on the optimal power flow in transmission grid,a convenient stochastic optimal power flow model based on steady-state security region(SSR)is proposed in this paper.First,based on the AC power flow model and the sensitivity method,the hyperplane expressions of SSR are derived.Second,combined with the Cornish-Fisher series,a chance-constrained model of the optimal power flow is constructed.Third,a heuristic algorithm is proposed to solve this model.Finally,the simulation results of a modified IEEE 39-node transmission grid show that the proposed method can quickly deal with the uncertain power injections under the premise of ensuring the operation security.