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Recent studies have shown that dynamic removal of transmission lines from operation ("Transmission Switching") can reduce costs associated with power system operation. Smart Grid systems introduce flexibility into the transmission network topology and enable co-optimization of generation and network topology. The optimal transmission switching (OTS) problem has been posed in on small test...
The objective of this paper is to demonstrate 1) how adding storage capacity to a network can mitigate the variability of wind generation and increase the system benefits, and 2) how the stochastic characteristics of the wind generation affect the system benefits of storage capacity. Two types of storage are considered. One represents utility-scale storage that is collocated at the wind sites, and...
This paper proposes to evaluate reliability performances at operating stage for power systems with variable wind generation. This is a first step towards recognizing the stronger coupling of power system decision making across different time-scales. In the day-ahead energy-reserve co-optimization unit commitment model, the validity of using operating reserve as an approximation of long-term reliability...
In this paper, an approach based on the concept of Model Predictive Control (MPC) is used to control transmission voltages and prevent long-term voltage instability. The MPC model is based on a linearized steady-state system model derived from power flow equations. Simulation results are presented for the case of Nordic32 test system.
Restructuring of the US electric power system that began in the late 1990's appears to have run aground over the question of the assurance of both regulatory resource adequacy and generator long-term revenue sufficiency. The energy and capacity markets that have been designed for a number of the centralized markets in the US and elsewhere have not functioned as designed. Energy only markets such...
Energy futures for modern economies depend critically on the electric power system. Estimating the long-run benefits and costs of proposed energy or environmental policies requires tools that optimize investment in generation, account for physical constraints on the delivery network while maintaining desired reliability, and characterize the adverse impacts of pollutants. An integrated engineering,...
Given the importance of handling high levels of uncertainty from renewables in the unit commitment problem, there has been increased attention given to the use of stochastic programming methods. Since these are computationally very demanding, there is a need for new approximations. We propose to use a point forecast of energy from wind and loads, where the point forecast is chosen and adapted by simulation...
This paper presents findings on potential frequency-response-related impacts of increased variable renewable wind generation on North America's western interconnection by 2012. The assessment was conducted using commercially available, production-grade dynamic simulation tools and industry-developed system models, which include the amount of wind generation capacity that planners in the interconnection...
We are using a detailed realistic discrete event simulation model of the automatic German toll system to study resource usage of the mobile data network for various system configurations. Starting with an existing simulation model [1] we describe the driving patterns used in the simulation and the functionality added to the simulation model. Next we explain enhancements in simulation performance implemented...
Distributed energy resources, such as renewable energy resources (wind, solar), energy storage and demand response, can be used to complement conventional generators. The uncertainty and variability due to high penetration of wind makes reliable system operations and controls challenging, especially in isolated systems. In this paper, an optimal control strategy is proposed to coordinate energy storage...
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