Control Strategy Applied to Smart Photovoltaic Inverters for Reactive Power Exchange Through Volt-Var Control to Improve Voltage Quality in Electrical Distribution Networks

The paper includes the analysis of the operation of low-voltage prosumer installation consisting of receivers and electricity sources and equipped with a 3-phase energy storage system. The aim of the storage application is the management of active power within the installation to decrease the total power exchanged with the supplying network and thus reduce energy costs borne by the prosumer. A solution for the effective implementation of the storage system is presented. Apart from the active power management performed according to the prosumer’s needs, the storage inverter provides the ancillary service of voltage regulation in the network according to the requirements of the network operator. A control strategy involving algorithms for voltage regulation without prejudice to the prosumer’s interest is described in the paper. Reactive power is used first as a control signal and if the required voltage effect cannot be reached, then the active power in the controlled phase is additionally changed and the Energy Storage System (ESS) loading is redistributed in phases in such a way that the total active power set by the prosumer program remains unchanged. The efficiency of the control strategy was tested by means of a simulation model in the PSCAD/EMTDC program. The results of the simulations are presented.

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Optimal Sizing of Electrical Distribution Networks considering Scalable Demand and Voltage

2018 IEEE 1st Colombian Conference on Applications in Computational Intelligence (ColCACI) ◽

10.1109/colcaci.2018.8484859 ◽

2018 ◽

Author(s):

Esteban Inga ◽

Miguel Campana ◽

Roberto Hincapie

Keyword(s):

Distribution Networks ◽

Optimal Sizing ◽

Electrical Distribution ◽

Electrical Distribution Networks

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Influence of Clandestine Connections on Energy Loss Evaluation in Electrical Distribution Networks

10.48011/sbse.v1i1.2322 ◽

2020 ◽

Author(s):

Clainer B. Donadel ◽

Gilberto C. D. Sousa ◽

Flávio M. Varejão

Keyword(s):

Artificial Intelligence ◽

Developing Countries ◽

Energy Loss ◽

Loss Factor ◽

Distribution Systems ◽

Distribution Network ◽

Distribution Networks ◽

Operation Costs ◽

Electrical Distribution ◽

Electrical Distribution Networks

In the literature, there are several methodologies to estimate technical losses in electrical distribution networks. The range of techniques is broad, ranging from basic techniques (based on loss factor, for example) to sophisticated ones (based on artificial intelligence). These methodologies are important, because the costs of technical losses represent a huge part of the total operation costs of distribution network operators (DNOs). However, the presence of clandestine connections, common in developing countries, was not considered in the methodologies encountered in the literature. Clandestine connections occur when a consumer has made his/her connection without DNO permission. In these cases, the amount of energy consumed by a clandestine "consumer" is a nontechnical loss (and, therefore, should be correctly computed as nonbilled energy). Therefore, a new methodology is proposed to consider the presence of clandestine connections in energy loss estimation in distribution systems.

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