Coordinated look-ahead robust optimization of hierarchical electrical power grids
Received date: 2026-04-09
Revised date: 2026-07-20
Online published: 2026-09-03
Supported by
Science and Technology Project of SGCC(5400-202424184A-1-1-ZN)
With the large-scale integration of renewable energy into multi-level power grids,the traditional deterministic dispatch framework with separated operation among different grid levels faces challenges such as boundary power mismatches and insufficient reserve capacity.To address these issues,this paper proposes a coordinated robust intra-day rolling dispatch model for multi-level power grids based on renewable energy prediction intervals.By coordinating the operation of transmission,distribution,and microgrids,the proposed model exploits the flexibility potential of large-scale flexible resources on the distribution network and microgrid sides, thereby enhancing renewable energy accommodation.An affine adjustable policy is introduced to transform the original robust optimization model into an equivalent quadratic programming formulation,and a multi-parameter space projection decomposition algorithm is developed to efficiently solve the problem.While preserving the convexity of lower-level optimization problems,each grid level only needs to exchange boundary power information and optimal projection functions to achieve the global optimum.Simulation results on the T118-D33-M4 test system demonstrate that the proposed method improves computational efficiency by approximately 8 and 11 times compared with generalized Benders decomposition and the alternating direction method of multipliers,respectively,while effectively promoting renewable energy accommodation.
Qi WANG , Chenhui LIN , Wenchuan WU , Guang FENG , Xu YANG , Xuan DONG , Cheng GONG , Mingming XU . Coordinated look-ahead robust optimization of hierarchical electrical power grids[J]. Electric Power, 2026 , 59(8) : 16 -29 . DOI: 10.11930/j.issn.1004-9649.202604025

表1 所提分解协调方法和集中式方法的计算结果对比Table 1 Comparison of calculation results between the proposed method and the centralized method |
| 方法 | 总目标函数值/元 | 输电网的发电成本/元 |
|---|---|---|
| 本文方法 | 1547841 | 1274175 |
| 集中式方法 | 1547675 | 1273829 |
| 相对误差 | 1.07×10-4 | 2.72×10-4 |
表2 所提算法与其他分布式算法的性能对比Table 2 Performance comparison between the pro-posed algorithm and other distributed methods |
| 方法 | TG& DNs/次 | DN#1& MGs/次 | DN#2& MGs/次 | DN#3& MGs/次 | 总计算时间/s |
|---|---|---|---|---|---|
| 本文方法 | 54 | 194 | 175 | 168 | 74.65 |
| GBD | 632 | 2785 | 2568 | 2459 | 665.49 |
| ADMM | 957 | 3217 | 3048 | 2971 | 867.24 |
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