Abstract
Optimal operation of distribution grid resources relies on accurate estimation of its state and topology. Practical estimation of such quantities is complicated by the limited presence of real-time meters. This article discusses a theoretical framework to jointly estimate the operational topology and statistics of injections in radial distribution grids under limited availability of nodal voltage measurements. In particular, we show that our proposed algorithms are able to provably learn the exact grid topology and injection statistics at all unobserved nodes as long as they are not adjacent. The algorithm design is based on novel ordered trends in voltage magnitude fluctuations at node groups, that are independently of interest for radial physical flow networks. The complexity of the designed algorithms is theoretically analyzed and their performance is validated using both linearized and nonlinear ac power flow samples in test distribution grids.
| Original language | English (US) |
|---|---|
| Article number | 9019629 |
| Pages (from-to) | 1391-1403 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Control of Network Systems |
| Volume | 7 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 2020 |
Keywords
- Clustering
- complexity
- distribution grid
- linear flows
- load estimation
- missing nodes
- spanning tree
ASJC Scopus subject areas
- Control and Systems Engineering
- Signal Processing
- Computer Networks and Communications
- Control and Optimization