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The paper presents the energy exchange mediated by a prosumer, highlighting the measurement context for the active power and energy. It is a case study on the combined measurement uncertainty calculated for typical power system measurement chain deployed for hourly power dispatch on the Romanian Energy Market.
The paper presents aspects related to the connection of renewable sources of energy to the grid and focuses on the Photo Voltaic Power Plant (PVPP). The correlation of this process with Power Quality (PQ) issues and conditions for certification of each plant in accordance with regulations are included in our work as well. Results of measurements of PQ in the Points of Common Coupling (PCC) in the...
Sustainable use of energy through an increased public and individual awareness is an important goal from several perspectives: it is a useful mean to obtain energy savings based on users behavior change, it is a way to understand the local and general context of energy ecosystem related to renewable energy contribution and to carbon footprint and its possible correlation with ambient factors. Thus...
This paper presents a straightforward solution for supporting energy efficiency in Smart Cities, under multi-utility ownership, role-based multi access of metering data, and data privacy and security, by using the Unbundled Smart Meter (USM) concept. Smart meters are placed at the connection point of the customer with the network and is about to become the most abundant equipment in active distribution...
Evaluation of PQ parameters is made by means of the results of measurements. Because the evaluation of PQ parameters must be reasonable, the results of measurements must have a adequate confidence level. In this sense, have been established a number of requirements that are specified, for each PQ parameter, in IEC 50160:2010, IEC 61000-4-30:2008 and other related standards. One of the essential requirements,...
Power Quality assessment is based on measuring and monitoring of specific parameters. Measure uncertainty level is important because parameters values are estimated based on this information and then compared with admissible limits. More, the decisions and solutions for electromagnetic pollution limitation is also based on that results. ISO/IEC 61000-4-30:2008 Standard contains uncertainty levels...
The determination of power quality levels, through objective approach, is based on recordings of measurement information. For a more complete characterization of power quality parameters, the measurement process is required to include measurements of the alternating current as well, as specified in IEC 61000–4 series regulations "Electromagnetic Compatibility". In this article we present...
The purpose of Power Quality measurements can be either continuous “surveillance” as a task performed by the Distribution System Operator or specific parameter “evaluation” for limit violation. Individual strategies can be applied for each goal but a combined approach is preferred. This paper presents a comparison between results obtained using an electricity meter with Power Quality capabilities...
Romanian TSO/DSO performed the necessary steps to implemented a nationwide Power Quality Monitoring System(PQMS)/Metering Monitoring System(MMS). First results encouraged us to consider grid extended PQMS and MMS as emerging data provides for the development of smart grids technology. The first part of the paper provides a description of the Power Quality(PQ) and Metering Romanian regulations. The...
Last decade brought important developments for the energy/power market all over the world [1]. In Europe, transforming local markets into regional energy markets is on the agenda[5]. The idea of EU Directive 72 [2] to develop Smart Metering systems for 80% of the customers raises some stakeholder responsibility and ICT (information and communication technology) issues. This article analyses actual...
The knowledge power quality levels, through objective approach, is based on the accumulation as measurement information. For a more complete characterization of power quality parameters it is necessary that the measurement process to include in the set of specific operations and evaluation of measurement uncertainty. Measurement uncertainty is a specific parameter of measurement method and conditions...
European and national authorities are focusing on renewable energy sources for some time now. Incentives for investments in this domain targeted both development of new sites and bonuses for green energy production so many projects for small energy production plants are now either working or will be commissioned in near future. In contrast, refurbishing of existing distribution network is somehow...
Recent developments of liberalized energy market promoted Automat Meter Reading systems as the principal instrument for metering operators. Over the past years few years' information gathered from field energy meters accumulated in very large databases.
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