Sensor optimum location algorithm for estimating harmonic sources injection in electrical networks

Abstract

Today, the presence of disturbing loads in low, medium and also directly in high voltage networks is producing a growing presence of harmonics and unbalance in transmission levels. Economic reasons difficult the installation of harmonic measurement devices in all the buses of the system. Instead, it would be possible to install harmonic measurement equipment in selected buses, in a fraction of the buses of the network. With them, estimation of harmonic current injection can be made. In this paper, a method to estimate the best buses to install harmonic voltage measurement equipment is presented. Based on the configuration of the network supplied by the TSO (by means of its impedance matrix), the method allows to determine which are the best buses. The method is being implemented for the Spanish TSO REE, to allow the watching of the harmonic and unbalanced presence in the Spanish transmission network, with the actual equipment and to determine the future equipment installation buses. It is developed by the UPM Electrical and Mathematics Departments under an investigation project (GENINF) with REE funding.