A Flexible GPS-based System for Synchronized Phasor Measurement in Electric Distribution Networks

Abstract

Large scale distributed measurement systems are the object of several applications and research works. The goal of the present work is to develop, by employing GPS receivers, measurement techniques suited to the continuous monitoring of the electrical quantities in distribution networks, in terms of synchronized phasors. The proposed measurement procedures, differently from commercially available Phasor Measurements Units (PMUs), are based on general-purpose acquisition hardware and processing software, thus guaranteeing the possibility to be easily reconfigured and reprogrammed, according to the specific requirements of the different possible fields of application and to their future developments.

The OpenPMU Platform for Open-Source Phasor Measurements

“…This has led to some research departments developing their own PMU systems. Many designs utilize low cost hardware, such as described in [7]. Two university projects are described in this section.…”

“…OpenPMU has been re-structured into modules which decouple the various components of a PMU by means of defined information exchange structures. This modular approach allows advanced phase estimation algorithms, such as [5], [6], or measurement techniques such as [7] to be implemented on open hardware and subject to the same test procedures as commercial PMUs.…”

Impact of synchrophasor measurement types and uncertainties on the accuracy of distribution system linear state estimators

“…Nowadays, phasor measurement units (PMUs) are able to acquire accurate synchrophasors streamed at some tens of frames-per-second [4]. Within the context of real-time monitoring of active distribution networks, advanced PMUs exhibiting high accuracy and resilience against fast transients and distorted waveforms have been developed [5]- [7]. The availability of this kind of measurements enables the formulation of dedicated state estimation (SE) processes that are generally linear (e.g., [3], [8]- [11]).…”

Fast-Convergence Microsecond-Accurate Clock Discipline Algorithm for Hardware Implementation

“…Typical examples are distributed measurement and control systems [1] and the synchronized phasors (synchrophasors) applied to power distribution networks [2], [3]. In these systems, measurement and control equipment is synchronized using specific protocols through the communication network itself, which is usually a switched Ethernet network [4].…”