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Non-simulation reliability evaluation of active distribution systems using a primary-backup bidirectional search algorithm
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DOI：10.1016/j.segan.2026.102453.png)
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Abstract
En 中文
The traditional non-simulation linear programming method can avoid sampling simulation, however, it is insufficient for reliability evaluation in active distribution systems (ADS). In ADS, distributed power sources can act as backup power sources, thereby forming complex bidirectional power supply scenarios. Under such scenarios, it becomes difficult for traditional methods to capture multi-source coordination characteristics. Consequently, these methods fail to meet the reliability evaluation requirements of active distribution systems. Therefore, this paper proposes a non-simulation reliability evaluation method for active distribution systems based on a primary-backup bidirectional search (PBS) algorithm, to overcome the limitations of existing traditional non-simulation algorithms in handling reliability evaluations under complex multi-source coordination scenarios. First, a non-simulation reliability evaluation model of active distribution system is established. The decision variables of the optimization problem are designed to characterize the distribution system topology, enabling the equivalent calculation of reliability indices via a non-simulation linear programming approach. Second, a bidirectional search algorithm is proposed to identify load node sets and locate load nodes capable of power restoration; based on this, the reliability enhancement problem of active distribution systems is innovatively reformulated as a system of full-rank linear equations. Finally, the effectiveness of the proposed method is investigated through the case study on 6 nodes, 37 nodes and 85 nodes systems. For the 37-node system, the system average outage duration decreases from 1.5312 h/year to 1.1764 h/year, resulting in a reliability improvement of 23.17%. The proposed method provides an effective non-simulation reliability evaluation framework, for the active distribution systems under complex multi-source coordinated power supply scenarios.
Keywords:
Non-simulation algorithm
Primary-backup bidirectional search algorithm
Active distribution systems
Reliability evaluation
Journal
S
IF:
5.6
Papers:
55
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0