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A single-period optimal dispatching problem is considered for a network of energy utilities connected via multiple transmission lines, where we seek to find the lowest operationalcost dispatching of various energy sources to satisfy demand. Our model includes traditional thermal resources and renewable energy resources available generation capabilities within the grid. A key novel addition is the...
The automatic disturbance detection and classification based on wide area frequency data from a nationwide frequency monitoring network (FNET) is very important to improve control algorithm for ensuring power system security and reliability, an essential function for smart grid infrastructure. Moreover, in a future power system mostly consisting of distributed generators and renewable energy resources...
Distribution System State Estimation (DSSE) stays in focus in all smart grid related topics. In Medium Voltage (MV) networks, in particular, and in distribution networks, in general, DSSE is a prerequisite for smart grid functionality. In this paper a new approach for a three-phase DSSE is presented. It utilizes the most types of analog real time measurements (including current magnitude, active and...
The present paper addresses the topic of fault location in power networks with cable lines. In the era of smart-grid the demand of intelligent measurement systems capable of providing quickly and with high accuracy the right location of faults in power networks is growing fast. Many proposals can be found in literature relevant to different approaches. Some commercial instrumentation is also available...
Three phase power flow calculation is required for Transmission Network Analysis (TNA) and Distribution Network Analysis (DNA). In TNA it is needed to calculate voltage and current unbalance factors, required by Power Quality Analysis. In DNA Three Phase Power Flow is a must to have tool, since power flow is used as a basis tool for other DNA methods. This paper presents modeling proposal for using...
Accurate fault location is a challenge for most Distribution Management Systems (DMS). This paper analyses one possible method for Fault Location (FLOC) using impedance information available from Impedance Fault Relay (IFR). This method is applicable for symmetrical as well as un-symmetrical networks. It delivers accurate results for radial as well as meshed networks. The Impedance based FLOC is a...
Power and energy supply has been faced with many challenges in the 21st century, accordingly the future development and innovation of power technologies is urgently needed. As a result of environmental pressures and energy shortage, human society needs to be powered by low-carbon or distributed sustainable energy, thus a conceptual smart grid with an originally created structure is brought forward...
A vision of the smart grid as an agent of economic value creation is needed to understand the paradigm shift that will be unfolding over the next few decades in the electricity market. This paper presents one such vision of the smart grid from an electricity market perspective and discusses its technical underpinnings. In contrast with the current mix of traditional and renewable resources, the smart...
For the past few years, plug-in electric vehicle (PEV) technology development has gained immense popularity. Recent studies show that if PEVs displaced half of all vehicles on the road, they would require only an 8% increase in electricity generation. Results similar to this help encourage the continuing development of PEVs. Despite this small increase in generation, uncontrolled charging, especially...
This paper presents a mechanism for developing knowledge based support in multiagent based control and diagnosis. In particular it presents a way for autonomous agents to utilize a qualitative means-ends based model for reasoning about control situations. The proposed mechanism have been used in different scenarios of electric power distribution system protection and control. Results show that agents...
We propose a framework for reducing demand-supply imbalances in the grid, by jointly controlling both the supply-side electric power regulation together with the demand-side energy consumption by residential and commercial consumers demand response. We focus on performance improvements that arise from the complementary dynamics: regulation allows for frequent control updates but suffers from slower...
State space pruning is a methodology that has been successfully applied to improve the computational efficiency and convergence of Monte Carlo Simulation (MCS) when computing the reliability indices of power systems. This methodology increases performance of MCS by pruning state spaces in such a manner that a conditional state space with a higher density of failure states than the original state space...
An aggregator is designed for Vehicle-to-Grid (V2G) frequency regulation service. Active discharge of the plug-in electric vehicle is enabled utilizing the regulation signal to avoid the energy constraint. Some structural restrictions are investigated through the system review. In addition, the characteristics of regulation signal are retrieved though statistical analysis. Then, an objective function...
The critical infrastructures of our society are in the process of being modernized. Most significantly impacted are the industrial control systems through replacement of old electromechanical systems with advanced computing and communication technologies. This modernization has introduced new vulnerabilities to those infrastructures. Securing critical infrastructures is a challenging research problem,...
The smart grid effort is the single largest grid modernization investment in American history. What began as a theoretical idea has increasingly become a reality. Close to $10 billion in investments from both government and industry will introduce major activities in the next 3-5 years as the main momentum of the energy industry transformation. As grid development proceeds, it is necessary to realize...
Managing distributed energy sources, energy storage, and consumer's active behavior coupled with sustainability objectives, requires significant changes in the architecture and technologies used to control the electricity infrastructure. Electricity consumers are evolving into economically motivated “prosumers” that not only consume, but can also produce and store electricity. Prosumers can become...
This paper describes a methodology for making robust day-ahead operational schedules for controllable residential distributed energy resources (DER) using a novel energy service decision support tool. The tool is based on the consumers deriving benefit from energy services and not on electric energy. It maximizes consumer net benefit by scheduling the operation of DER. The robust schedule is derived...
As micro-combined heat and power (micro-CHP) systems move towards mass deployment together with other kinds of distributed energy resources (DER), an increasing emphasis has been placed on how to coordinate such a large diversified DER portfolio in an efficient way by the Virtual Power Plant (VPP) like aggregators. Compared to the centralized direct control scheme, a decentralized control scheme “control-by-price”...
With the advancement of sensor, communication and information technologies, Wide Area Monitoring, Protection and Control (WAMPAC) systems have been identified as the new generation of solutions to improve power system planning, operation and protection. There are a number of Southern California Edison (SCE) advanced initiatives that are related to the WAMPAC systems. Despite differences among various...
In this paper, grid synchronization for gird-connected power generation systems in the presence of voltage unbalance and frequency variation is considered. A new extended Kalman filter based synchronization algorithm is proposed to track the phase angle of the utility network. Instead of processing the three-phase voltage signal in the abc natural reference frame and resorting to the symmetrical component...
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