Power Distribution System Characterization With Active Probing: Real-World Testing and Analysis

Abstract

Power distribution systems are traditionally characterized using passive means such as parameter estimation and topology identification. This work investigates an active way to test and characterize dynamically changing distribution systems. The method actively perturbs local distribution networks with programmable pulses using a Grid Resonance Probe (GRP) and observes the response using a micro-phasor measurement unit (µPMU). After applying advanced data analytics, the perturbation and response measurements can reveal characteristics of distribution systems, such as feeder parameters and topologies. To validate the proposed approach, three case studies are executed on a real distribution system, including visualization, feeder connection identification, and feeder impedance estimation. Real data processing considerations and sensitivity analysis are also discussed. The proposed testing and analysis approach is expected to provide engineers a new solution to measure, parameterize, and characterize distribution systems.

Micro Phasor Measurement Units: a Review from the Prosumer Point of View

“…Thus, PMU provides relatively accurate results in the minimum positive-sequence voltage magnitude information. The increasing penetration of solid-state powertransforming devices such as inverters and rectifiers into the distribution system leads to power quality problems such as harmonics [24]. These harmonics must be identified correctly to maintain power quality for residential and industrial customers.…”