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arXiv 1303.4153cs.DCmath.OC
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基于网络流言的电力系统鲁棒分散状态估计与跟踪

Robust Decentralized State Estimation and Tracking for Power Systems via Network Gossiping

Xiao Li, Anna Scaglione

摘要:

提出了一种基于网络流言的电力系统全分散自适应重加权状态估计(DARSE)方法。使能技术是提出的基于Gossip的高斯-牛顿(GGN)算法,该算法允许利用每个区域(即从本地传感器获取数据的数据库服务器)的计算能力来协作求解准确的全局状态。DARSE方案通过在线更新其误差方差并自适应地重新加权其贡献以用于状态估计来减轻坏数据的影响。因此,可以使用每个区域中的近邻通信来鲁棒地估计和跟踪全局状态。与其他分布式状态估计技术相比,我们的通信模型是灵活的重新配置和弹性的随机故障,只要通信网络连接。此外,我们证明了潮流方程的雅可比矩阵满足Lipschitz条件,这是必不可少的GGN算法收敛到所需的解决方案。IEEE-118系统的仿真结果表明,DARSE方案可以在线准确地估计和跟踪全局电力系统状态,并在存在随机故障和坏数据时优雅地降级。

英文摘要:

This paper proposes a fully decentralized adaptive re-weighted state estimation (DARSE) scheme for power systems via network gossiping. The enabling technique is the proposed Gossip-based Gauss-Newton (GGN) algorithm, which allows to harness the computation capability of each area (i.e. a database server that accrues data from local sensors) to collaboratively solve for an accurate global state. The DARSE scheme mitigates the influence of bad data by updating their error variances online and re-weighting their contributions adaptively for state estimation. Thus, the global state can be estimated and tracked robustly using near-neighbor communications in each area. Compared to other distributed state estimation techniques, our communication model is flexible with respect to reconfigurations and resilient to random failures as long as the communication network is connected. Furthermore, we prove that the Jacobian of the power flow equations satisfies the Lipschitz condition that is essential for the GGN algorithm to converge to the desired solution. Simulations of the IEEE-118 system show that the DARSE scheme can estimate and track online the global power system state accurately, and degrades gracefully when there are random failures and bad data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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