-Currently, there is a deep discussion going on among the power system society about the architecture of the future system. In practice, the smart grid concept is expected to be applied in various different forms and there will be a need for significant investments in both existing and new infrastructures. In this drastically evolving environment, policy makers and electric utilities are finding themselves in challenging positions to plan and prioritize methodologies and initiatives for future developments. Among others, decentralized power generation is gaining significance in liberalized electricity markets, and small size electricity consumers become also producers (prosumers). The scope of this paper is to map those factors (and their interactions) that influence the load profile, and provide a methodology for modeling the behavior of electricity prosumers. Simulations provide a time and cost effective way to vision the future power system and promote the most efficient solutions. The importance of including the behavior of a large amount of small size prosumers in power system simulations will be outlined, and this concept will be illustrated through an example of modeling car drivers' behavior in order to assess the grid impact of electric vehicles charging in Dutch residential areas.
This paper describes. what factors (i.e., load and supply) have an important effect on the neutral conductor current. It is shown that an asymmetry up to 10degrees or an unbalance of 10% in the power supply has only a minor effect on the rms value of the neutral conductor current. An unbalance in load conditions increases the neutral conductor current. Harmonics in the power supply voltage highly affect the rms value of the neutral conductor current
Abstract. The number of installed distributed generation (DG) in residential areas rapidly increases, specifically in the form of photovoltaics (PV), causing some undesired side effects such as voltage rise. Overvoltage can damage critical loads, but is also disadvantageous for the owner because inverters switch off in case of overvoltage, resulting in output loss. Voltage limits are investigated through calculation and simulation of the voltage profile in a typical low voltage (LV) grid by using load data. Insolation data is used for the particular case of PV. This paper presents practical guidelines for the maximum power acceptance in a residential distribution network and the estimation of PV production loss due to overvoltage.
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