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Parsons Brinckerhoff Africa (PB) in association with ACE Energy and PPA Energy was contracted by the Government of Rwanda (GOR) through the Ministry of Infrastructure (MININFRA) in Rwanda to formulate a National Electricity Grid Code (‘Grid Code’) for Rwanda. The Grid Code was successfully delivered to the client encompassing the requirements of the revised Electricity Law in Rwanda to allow private...
At a time when the rate of skills renewal is high, linked to the large numbers of technicians retiring, it is necessary to find training methods that can meet this challenge.
The paper presents a new solution for SCADA/DMS electrical feeder network schematics and automation synoptics based on a model-driven approach, allowing for an automatic and on the fly diagram generation replacing the traditional manual drawing and manual dynamic behaviour configuration for each diagram instance.
This work deals with the application of Artificial Immune Systems (AIS) in distribution systems. Based on natural immune systems, these systems present some important characteristics that may be useful in optimization of power systems operation and planning. In this paper, such a technique is enhanced by tangent vector to help the search solution, so the optimization process is accelerated. The tests...
This paper introduces a novel solution for shaping electricity demand and decreasing it in peak hours via controlling electro-pumps which are used for irrigation purposes. It will be shown that in the regions where pilot projects are implemented, electricity demand is decreased dramatically. However a number of electro-pumps and whole electricity consumptions have is increased normally. Furthermore...
In catastrophic incidents, taking critical infrastructure and equipment back into operation as quickly as possible becomes more and more important. The energy supply of information and communication technology (ICT), services of health, emergency and rescue belong to potential critical infrastructure from an electrical engineering perspective. During outages electrical energy can be provided by standby...
A resistance-grounded distribution system has a critical element that is often forgotten — the neutral-grounding resistor (NGR). Because NGR's are subject to failures [1] related to thermal overload, lightning, storms, extended service life, manufacturing faults, vibration, corrosion, and improper specification or installation, the proper monitoring of NGR health is important as all other protections...
This article describes solutions to the problems. that appeared in the development process of the construction power quality monitoring system. The system based on integrated data platform and it's advanced applications such as regional power quality assessment and Staining, association of transient event and fault information, data correction were proposed. Finally, Operation Practice and many cases...
The paper present the historical Danish approach for fault and interruption statistics within the ELFAS cooperation. From January 2013 ELFAS have introduced a revised set of guidelines and recommendations on registering detailed component and customer information for detailed fault and outage statistics for future use in asset management and in a more detailed view on continuity of supply.
In the last years, the low voltage loads in the distribution networks are changing due to the massive introduction of computers, air conditioning equipment and many other household appliances. This high frequency capacitive loads and some other factors like ground faults in the LV network, connections/disconnections in the MV network, etc, sometimes provoke transient overvoltages that ends up in a...
The supply territory of the company E.ON Distribution in the Czech Republic (operated by the company E.ON Czech Republic) accounts for approximately 1.5 million customers, the most of them are connected to the low voltage (LV) distribution grid. The goal of this paper is to describe problems of voltage quality in the LV distribution grid, if exist. The survey is based on the evaluation of approximately...
In the 1960's, the load switch disconnector for Distribution Networks was launched for the first time. Before then, electric utilities had access only to circuit breakers large in size and requiring a lot of maintenance, or simple disconnectors and exchangeable fuses. Therefore the load switch disconnector and the fuse load switch disconnector represented a substantial break through. It opened up...
Small differences in transformer losses are not important when a transformer is analyzed alone but they are significant when the population of transformers present in an electricity distribution system are considered. Based on those facts, it was analyzed the effects of the unbalanced loads connected to the secondary of transformer in the transformer load losses. The load losses are calculated based...
Maintenance inspection has an important role for distribution network companies. Inspections should be homogeneous and cost-efficient, and, at the same time, additional values should be created where possible. Elenia Oy has made use of an aerial photography system for its overhead line medium and high voltage network. Clear benefits and additional values are observed with the technique. This paper...
The Electric Power Research Institutes (EPRI) seven-year Smart Grid Demonstration Initiative is obtaining a rich set of research results from numerous case studies conducted in 2012 and 2013. of the research project. The Initiative, which is as it entering its 6th year has 23 utilities from 5 countries collaborating on 15 demonstrations. This paper provides an overview of case studies from 2012 and...
Up to now MV grid intelligence was concentrated in a few nodes, but, to enable Smart Grid's development, the presence of broadly distributed intelligence is a must; accordingly the installation of distributed measurement at several points of the MV grid is critical. In this context Enel Distribuzione and 3M have worked together on a very innovative component to retrofit existing installations: a sensored...
Technology advancements in solar photovoltaics (PV) and battery storage have driven sharp increases in their employment by utilities, consumers, and third parties. These Distributed Energy Resources (DER) are often connected to the grid at the distribution level, and distribution operational requirements are being greatly impacted by their presence. Despite the potential impact of DERs on the distribution...
This paper considers how development of handheld photogrammetry offers the Power Industry a unique approach to ground-based OHL inspection, vegetation management and pole audit, and provides industry specific examples of return on investment (ROI) from the United States.
There is a growing need for installation of equipment along the depth of power distribution network in order to quickly detect failures and to obtain information about the state of the network itself. This paper describes the technical implementation of the GPRS communication solution for connecting Faulted Circuit Indicators (FCI), which are installed in MV network, to the supervisory control and...
One of the greatest challenges of a Distribution System Operator (DSO) is to ensure continuous improvement in the quality of service, while improving efficiency and decreasing operational costs. EDP Distribuição (EDP Group), Portugal is the Low, Medium and High Voltage Distribution System Operator in the country, with more than 6 million customers, over 400 HV/MV Substation and 60 thousand MV/LV Substations,...
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