Gradient-Based Multi-Area Distribution System State Estimation

摘要: The increasing distributed and renewable energy resources controllable devices in distribution systems make fast system state estimation (DSSE) crucial monitoring control. We consider a large multi-phase formulate DSSE as weighted least squares (WLS) problem. divide the into smaller areas of subtree structure, by jointly exploring linearized power flow model network topology, we propose gradient-based multi-area algorithm to exactly efficiently solve WLS proposed enables parallel computation problem without compromising any performance. Numerical results on 4,521-node test feeder show that designed features convergence accurate results. Comparison with traditional Gauss-Newton method shows has much better performance limited amount reliable measurement. real-time implementation tracks time-varying states high accuracy.