Paula Vide | Polytechnic Institute of Leiria (original) (raw)

Papers by Paula Vide

2012 ELEKTRO, May 1, 2012

With the development of synchronized phasor measurement technology in recent years, it gains grea... more With the development of synchronized phasor measurement technology in recent years, it gains great interest the use of PMU measurements to improve state estimation performances. In this paper, a mixed measurement (SCADA and PMU measurements) state estimator is proposed. Several measures useful for evaluating various aspects of the performance of the mixed measurement state estimator are proposed and explained. State Estimator validity, performance and characteristics of the results on IEEE 14 bus test system are presented.

This article presents a prospective impact study on the electric demand curve of the residential ... more This article presents a prospective impact study on the electric demand curve of the residential sector of the city of Cuenca assuming a massification of electric vehicles and the charging stations at domestic level possess an average power of 5.83 kW. Scenarios presenting the connection of different numbers of electric vehicles, corresponding to the penetration level of Ecuador, considering no tariff scheme, a tariff scheme and an intelligent recharge scheme were analyzed. Results reveal that the tariff scheme is efficient for the first years of introduction of the electric vehicle, given battery recharge is shifted to periods of low electric demand. However, when the penetration of electric vehicles increases an intelligent recharge strategy resulting into a distribution with greater uniformity in the low demand period is required.

Worldwide is the concern about climate change and the impact on our planet indisputable. One of t... more Worldwide is the concern about climate change and the impact on our planet indisputable. One of the aspects that enhances environmental problems is the generation of energy through conventional methods. Due to this, governments all over the world, and particularly Ecuador, opted for the implementation of renewable energy for the generation of electricity. This paper discusses possible technical impacts of distributed generation and energy storage of local distribution networks in Ecuador. Technical impacts on losses, voltages and reversed power flow are analyzed. OpenDSS software was used to model the networks. Different scenarios of photovoltaic (PV) penetration were analyzed. Also, the effect of the incorporation of storage in a high PV penetration network was examined.

Page 1. State Estimation Model Including Synchronized Phasor Measurements Paula S. CastroVide EST... more Page 1. State Estimation Model Including Synchronized Phasor Measurements Paula S. CastroVide ESTG Leiria Portugal paula.vide@ipleiria.pt FP Maciel Barbosa FEUP & INESC Porto Portugal fmb@fe.up.pt ... ( ) ( ) 1; cos sin cos sin (4) real n i ii i ii i j ij j ij j j ji i VG B VG B ...

2017 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America)

This paper presents an impact study of the incorporation of station charging for electrical vehic... more This paper presents an impact study of the incorporation of station charging for electrical vehicle level 2 on the network. A charging station with these characteristics was modeled and integrated into a sector of the electric power distribution system corresponding to the historic center of Cuenca. For simulation purposes, Psim® simulation software was used. Several charging scenarios are presented and power quality related to harmonic distortion is assessed. The analysis shows that, from the point of view of power quality, in the worst case, the voltage harmonic distortion is lower than 1.36%. From the point of view of energy capacity, it is demonstrated that in some cases the re-dimensioning of the distribution system is necessary because the capacity of the system could not withstand these new burdens.

State estimator is vital for on-line power system monitoring, analysis and control. With the incr... more State estimator is vital for on-line power system monitoring, analysis and control. With the increasing use of synchronized phasor measurement units (PMU) in power grids, how to utilize phasor measurements to improve the precision of state estimator becomes imperative. In this paper, a state estimator including voltage phasors, injected current phasors and traditional measurements is proposed. 14 IEEE bus system and 30 IEEE bus system are used as test systems and the simulation results demonstrate that the presented state estimation algorithm combining traditional SCADA measurements with PMU (Phasor Measurement Unit) measurements for power system state estimation improves the precision greatly.