| 引用本文: | 王守相,高嘉佐,赵倩宇,张丙杰.计及故障重构与信息约束的有源配电网短期可靠性评估方法[J].电力自动化设备,2023,43(10):79-86 |
| WANG Shouxiang,GAO Jiazuo,ZHAO Qianyu,ZHANG Bingjie.Short-term reliability assessment method of active distribution network considering fault reconfiguration and cyber constraints[J].Electric Power Automation Equipment,2023,43(10):79-86 |
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| 摘要: |
| 配电网短期可靠性可有效反映系统的运行风险，而分布式电源出力变化、网络重构与信息系统状态都是其重要影响因素。为此，提出了计及故障重构与信息约束的有源配电网短期可靠性评估模型和方法。首先构建基于马尔可夫过程的配电网元件短期停运模型，然后建立考虑故障重构与信息物理耦合的有源配电网故障后最优负荷削减模型，提出基于有向虚拟多商品流模型的考虑故障重构与孤岛划分的最优负荷削减策略，建立适用于故障重构与孤岛划分的辐射状拓扑约束以及考虑信息系统对配电网支撑作用的信息约束，实现对故障后果的精确分析。在此基础上，提出基于模型驱动的有源配电网短期可靠性评估方法，并进一步针对基于模型驱动的方法所存在的快速性不足缺点，采用“离线建模，在线评估”思想，提出基于最小二乘支持向量机的改进短期可靠性快速评估方法，实现了短期可靠性的快速评估。基于算例分析了负荷削减策略、分布式电源出力、信息物理耦合对系统可靠性的影响，验证了所提方法的有效性以及所提负荷削减策略对可靠性提升的优越性。 |
| 关键词: 有源配电网 信息约束 故障重构 短期可靠性评估 最小二乘支持向量机 |
| DOI：10.16081/j.epae.202309008 |
| 分类号:TM73 |
| 基金项目:国家自然科学基金资助项目(52077149)；国家自然科学基金智能电网联合基金重点支持项目(U2166202) |
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| Short-term reliability assessment method of active distribution network considering fault reconfiguration and cyber constraints |
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WANG Shouxiang1,2, GAO Jiazuo1,2, ZHAO Qianyu1,2, ZHANG Bingjie1,2
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1.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China;2.Tianjin Key Laboratory of Power System Simulation and Control, Tianjin 300072, China
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| Abstract: |
| The short-term reliability of distribution network can effectively reflect the operational risk of the system, and the output change of distributed generation, the network reconfiguration and the cyber system state are its important factors. Therefore, the short-term reliability assessment model and method of active distribution network considering fault reconfiguration and cyber constraints are proposed. Firstly, the short-term outage model of distribution network component based on Markov process is constructed. Then, the optimal load reduction model of active distribution network after fault is established, which considers the fault reconfiguration and the cyber-physical coupling. The optimal load reduction strategy considering fault reconfiguration and island division is proposed based on the directed virtual multi-commodity flow model, and the radial topology constraints available for fault reconfiguration and island division and the cyber constraints considering the supporting effect of cyber system on distribution network are established to achieve accurate analysis of fault consequences. On this basis, a model-driven-based short-term reliability evaluation method of active distribution network is proposed. Furthermore, aiming at the lack of rapidity of model-driven me-thod, an improved short-term reliability fast evaluation method based on least square support vector machine(LSSVM) is proposed by using the ideas of “offline modeling and online evaluation”,realizing the short-term reliability fast evaluation. The influence of load reduction strategy, distributed generation output and cyber-physical coupling on system reliability is analyzed based on a numerical example, verifying the effectiveness of the proposed method and the superiority of the proposed load reduction strategy on reliability improvement. |
| Key words: active distribution network cyber constraints fault reconfiguration short-term reliability assessment LSSVM |
