电气传动2025，Vol.55Issue(4)：26-32,7.DOI:10.19457/j.1001-2095.dqcd25254
基于随机森林算法的大电网动态等值方法
Dynamic Equivalence Method for Large-scale Power Systems Based on the Random Forest Algorithm
摘要
Abstract
The stability analysis of power system transient voltage,power angle,and frequency is often based on short-time-scale electromechanical transient simulation,which requires a relatively accurate large-scale simulation model,which not only has low simulation efficiency but also takes a long time,thus giving rise to the demand for dynamic equivalence of large power grids.However,as the proportion of new energy increases,the power system gradually presents some unique characteristics of new power systems,with more significant differences in system inertia,frequency spatiotemporal distribution,and frequency modulation resource distribution.Conventional dynamic equivalence methods based on slow coherence theory are gradually difficult to ensure accuracy.To solve these problems,based on previous work,a large power grid dynamic equivalence method based on random forest algorithm was proposed.First,the large power system was divided into the study area and the external area.Then the external area on the opposite side of the study area tie line was equivalent to several nonlinear dynamic loads controlled by the random forest algorithm.The random forest algorithm was trained using the original model tie line's voltage/reactive power and frequency/active power relationships.A joint simulation model based on PSS/E and Matlab platform was established to achieve equivalent simplified electromechanical transient simulation,and Python environment was used to achieve information exchange and simulation control between them.Simplified results for the Northeastern United States power grid was presented and compared them with existing methods.The results show that the proposed method can effectively balance simulation accuracy and control stability.关键词
大电网/动态等值/随机森林算法/联合仿真Key words
large-scale power system/dynamic equivalence/random forest algorithm/parallel simulation分类
动力与电气工程引用本文复制引用
雷傲宇,李俊,梅勇,童宁,王裕,吴为..基于随机森林算法的大电网动态等值方法[J].电气传动,2025,55(4):26-32,7.基金项目
国家自然科学基金(62273107) （62273107）
中国南方电网公司科技项目(0000002022030101FK00007) （0000002022030101FK00007）
广东省自然科学基金(2023A1515240082,2024A1515012720) （2023A1515240082,2024A1515012720）
