The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
President Obama called for doubling the share of renewable energy in the nation's supply in three years. California has a renewable energy target of 33% percent by 2030. These bold commitments need transformational strategies to achieve them. Government policies to achieve the ultimate goal of carbon reduction in electric energy systems are to (i) increase renewable penetration, and to (ii) introduce...
Ability to reasonably predict the power outputs of wind farms enables a better management of reserves and control mechanisms of turbines. Wind power forecasting is also important in assessing the wind energy potential of a region at the planning stages. This paper focuses on the prediction of power generation from wind farms in the short term. It proposes a least squares based method of predicting...
This paper presents a Common Information Model (CIM) based modeling process for PJM Market Management Systems (MMS). CIM network model is imported into MMS via a static model importer, which also serves as the model manager for the commercial model. In addition, standard CIM is extended for enterprise master data modeling processes. CIM compliant messages are used for data transfers between different...
Component derating and reconfiguration for distribution reliability is proposed in this work. Under the budget constraints postponing predictive maintenance is seen in many utilities. This practice can cause adverse effects on the performance of the utility. This work proposes a technique to improve the system reliability by derating the component with time varying hazard rate. Derating of a component...
This paper details the investigation of a large frequency excursion of 2.28 Hz, experienced in the New Zealand power system on 1st August 2009 when the HVDC interconnector tripped, resulting in a power deficiency in South Island power system. A major portion of the spinning reserve to cover for this contingent event was provided by generating units operated in Tail Water Depressed (TWD) mode which...
This paper presents an early warning and preventive control system for dynamic security, which has been used in several provincial power grids in China. The framework and the main modules of the proposed system are introduced. The system architecture is based on a Multi-agent system which is developed by our team. The modules like on-line contingency assessment, total transfer capacity evaluation,...
This paper presents some comparisons between the trends in electricity infrastructure growth in the United States and Brazil, and attempts to identify commonalities and differences on grid modernization efforts in these two countries using the Smart Grid Initiative as a template.
High penetration of wind power has posed great challenges to power system operators. Extensive research has been done aiming to improve the power system operations. Various mechanisms such as stochastic unit commitment and reserve calculation methods have been proposed. However, the power system operators may have different views on the research results due to practical constraints. This paper looks...
Utilities world over use decision support tools based on in-premise software with standalone architecture and suffer vulnerability when needing to extend their application to meet new business requirements. Accessibility of these applications are limited to specific operating environments resulting in restricted information being available at the right place and time to support decision making. Unlike...
In this paper, a notional Future Renewable Electric Energy Delivery and Management (FREEDM) system has been developed based on a real distribution feeder. The goal is to develop a digital testbed which can be used to show capabilities of this system, and to help the development of especially the new system components and the control schemes for this system. Two digital testbeds have been developed,...
This paper outlines the reasons why COES wants to adopt the CIM standard and the road map to make its information systems compatible with CIM. COES information system is an internally developed system (SICOES), and would be the starting point to adopt CIM. It is necessary to integrate the data of the third party software used in COES for power system analysis activities to the SICOES central equipment...
An evolutionary computation technique is used to minimize the active power losses, subjected to voltage constraints. The formulation is proved in two power systems, controlling variables such as generation voltages, taps position, and shunt elements, showing a reduction not only on power system losses but also resulting in a power generation decrement. These results are used to analyze the impact...
This paper describes demand response prospects for South Korea. To manage the increasing electric power demand, the way to increase power generation has reached a limit becoming a social, economic and environmental problem. To solve this problem by managing the supply side, demand response (DR) has become an important solution. As seen in other countries, the Korean electricity community plans to...
With the increase of distributed generation (DG) connections, circuit overload and voltage violation will occur for some distribution networks. However, building new lines to accommodate DG may pay high monetary and environment costs. A new procedure of distribution network reinforcement taking the active management means into consideration is proposed in this paper. Models and solution methods for...
Balancing Authorities are responsible for managing their system imbalances including deviations caused by the integration of variable generation resources. As wind and solar penetration levels increase, the challenges of managing power variations also increase. Working independently, balancing areas (BAs) with limited regulation and load following capacity and high wind power penetration would face...
In a restructured power system, there are many players who benefit from Demand Response (DR). These include the Market Operator (MO), the Transmission System Operator (TSO), Distributors, Retailers, Aggregators, and also consumers. This paper proposes a new concept - Demand Response eXchange (DRX) - in which DR is treated as a virtual resource that can be exchanged between two groups of players, namely...
The electricity distribution service in the Buenos Aires metropolitan area of Argentina, which was privatized in the early nineties, is carried out by three different Utilities and the control is performed by a Regulatory Agency (ENRE). By the time this control began, the existing limits in IEC standards for Power Quality were adopted in order to obtain a starting point for the local regulation. In...
Continuous connection of Distributed Energy Resources (DER) technology on a “fit and forget” basis may lead to inefficiently low utilization of generation and network assets. In order to mitigate this effect, a reappraisal of the technical, regulatory, and commercial frameworks that shape decisions on future network design, investment, operation, and pricing are required. The transition of distribution...
The goal of this tutorial is three-fold: to facilitate cross-disciplinary communication among power engineers and economists by explaining and illustrating basic financial risk management concepts relevant for wholesale power markets (WPMs); to illustrate the complicated and risky strategic decision making required of power traders and risk managers operating in multiple interrelated submarkets comprising...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.