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Due to environmental and economic incentives, the use of plug-in Electric Vehicles (EVs) is growing in several countries. The batteries of the EVs are recharged by being connected to distribution networks, and the power and energy required during the recharges are high compared to the typical loads. Consequently, the load levels can increase considerably, incurring in negative impacts to the distribution...
This paper introduces a methodology to propose planned operational actions within a short-time horizon in distribution systems. This methodology considers real-load curves of distribution transformers and distributed-resources composed of photovoltaic and storage systems. This proposed methodology uses an electric power distribution System simulator (OpenDSS) along with MATLAB in order to execute...
Nowadays, power distribution companies face new challenges in modern societies. Amongst them, a major challenge concerns customers demanding high service of quality and high reliability in their energy of supply to fulfill those demands. This paper proposes to broaden the classical concepts of multi-stage distribution expansion planning in a way to consider power quality costs. A genetic algorithm...
This paper presents a methodology and software for simulating alternatives and works to amend voltage levels provided to affected low voltage customers. The methodology describes a type of state estimation of a low voltage network, using voltage measurements of a single load point. From a set of possible alternatives to amend voltage levels, the main is to install the Portable Voltage Regulator for...
This article focuses on the developing of a Portable Voltage Regulator for Low Voltage Networks (PVRL VN), for single phase, two phases and three phases networks, which envisages meeting the regulations, given that the time established by the regulatory standards is a factor that limits the planning and the execution of corrective actions. The first PVRLVN was developed inside a Research & Development...
This paper describes the development of a Portable Voltage Regulator for Low Voltage Networks applications (PVRLVN) that aims keeping consumers feeding voltage within the limits set by Brazilian Regulations Agency (ANEEL). PVRLVN allows adjusting grid voltage by means of the addition or subtraction of the adequate amount of voltage through an isolated secondary winding of a Buck-Boost transformer,...
This paper deals with a methodology to obtain the probability functions related to variables involved in the short circuits in power systems, namely impedance, location, duration and type of fault. This information is obtained from real measurements taken from power quality monitors in distribution substations. The proposed methodology makes use of a fault location algorithm (FLA) in radial networks,...
This paper presents a methodology which determines the optimal allocation of power quality monitors, in order to monitor the occurrence of voltage sags and swells in distribution networks. Initially, the methodology characterizes the system under analysis regarding the occurrence of voltage sag and swells. This characterization is performed through the simulation of several short-circuits at different...
Customers are undoubtedly demanding a better power quality to be provided by electric power distribution companies. Many aspects have contributed to that, such as customer protection laws and regulatory issues. Furthermore there is relatively poor knowledge concerning load sensitivity in customer equipment, which used to be predominantly electromechanical and have become mostly electronically controlled...
While current fine electronics based equipment allow industrial processes to perform tasks that years before were impossible, they become more susceptible to the low power quality. Presently, industrial loads are coupled to networks through those electronic pieces of equipment, such as frequency inverters and soft-start devices, limiting the immunity to voltage sags. Voltage sags and swells are characterized...
The new industrial processes based on electronics and the need for compatible power quality at customer connection points must change the traditional distribution planning models. Instead of considering only costs of equipment used to reinforce or expand the distribution network as well as the costs of losses obtained from a power flow calculation, this article presents a methodology for distribution...
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