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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...
The design and implementation of a new control scheme for reactive power compensation, voltage regulation and transient stability enhancement for wind turbines equipped with fixed-speed induction generators in large interconnected power systems is presented. The nonlinear behavior of wind turbines has been represented in this paper by an uncertain term, derived from the Cauchy remainder of the Taylor...
Most of the power system networks have significant dynamic loads. In this paper, induction motor is considered as a dynamic load which causes voltage stability problems in power systems. This paper presents an analysis to investigate the critical parameters of power systems with dynamic loads for stability studies. To investigate the critical parameters, a single machine infinite bus (SMIB) system...
Synchrophasor technology was first introduced in 1980s. Since then, many electric utilities such as American Electric Power (AEP), Bonneville Power Administration (BPA), Southern California Edison (SCE), New York Power Authority (NYPA), as well as universities such as Virginia Polytechnic Institute (VPI), have been conducting R&D to explore and advance the application of synchrophasor technology...
The application of phasor technology is one of the most important next steps in the enhancement of power systems for smart grid technology. Phasor Measurement Unit (PMU) data is here and firmly established as vital to forensic studies. The electric utility industry is now moving at an accelerated pace with new initiatives to bring PMU data into the real-time fold. This panel paper highlights six areas...
This paper presents a Bibliography of Flexible AC Transmission System (FACTS) for 2008. It provides a listing of various journal and conference papers in this area.
Contingency analysis is a key function in the Energy Management System (EMS) to assess the impact of various combinations of power system component failures based on state estimation. Contingency analysis is also extensively used in power market operation for feasibility test of market solutions. High performance computing holds the promise of faster analysis of more contingency cases for the purpose...
The application of simple fuzzy power systems stabilizers (SFPSSs) to enhance the damping of inter-area oscillations of the Mexican Interconnected System (MIS) is presented. In particular, the work is focused on improving the damping of one of the most critical oscillation modes of the MIS: the north-south inter-area mode. The SFPSSs used in this work are characterized by a significantly reduced fuzzy...
This paper presents how the two types of dynamic limits (dynamic interface limit and dynamic unit group limit) are implemented and enforced in a market clearing engine (MCE) based generation scheduling system, developed by AREVA T&D for North China Grid Company (NCG).
In this paper, a dynamic power limiter at the point of common coupling (PCC) of a micro-grid is proposed. A 60Hz, step-down transformer is generally used at the PCC to connect the micro-grid to the power system grid. Substitution of the conventional 60Hz transformer by a dynamic power limiter has the following advantages: 1) Bi-directional active-power control capability at the PCC which results in...
Today, a large number of wind generator interconnection requests have been queued and are being processed. The generator interconnection group study is a way to reduce the generator interconnection cycle time and increase interconnection certainty. However, it is very challenging to identify the “best” transmission upgrades for a large group of generator interconnections. It is also very important...
In support of work to assess and ensure the reliability and resiliency of Florida's power generation, transmission, and distribution system as load and generation evolve in future years, groundwork is presented for the development of an open, dynamic model of the Florida grid and geographically distributed projections for growth in load and generation within the state. Using load forecasts provided...
Current methods in which maximum sizes of new wind farms are determined do not take into consideration their impact on future wind penetration levels. In this paper, two methods are proposed to determine maximum sizes of multiple new wind farms for maximizing wind penetration levels. In both methods, each new wind farm size is determined using an iterative process where each wind farm's size is incremented...
This paper presents an efficient security assessment system for validating power system operation planning, which has been used in Henan provincial power grid in China. Daily operation planning is to schedule unit commitment and to dispatch generator output economically considering next day generators and transmission components' maintenance planning. The security assessment for validating the daily...
Because it is almost impossible to train the dispatchers with real power system, the dispatcher training simulator (DTS) is used for the training. Among various components of the DTS, the power system model (PSM) emulates the dynamic behavior of the power system to calculate the frequency and voltage. In the PSM, the power plants are modeled as differential equations, so the mechanical power of the...
The inherent variability and uncertainty of wind power generation is a major issue for countries attempting to harness large quantities of wind-based renewable energy. Such properties of wind make optimal balancing of demand and generation a much more complex task. Clearly the flexibility of thermal plant in the electrical power system is of key importance, especially in smaller systems with high...
Static piecewise linear models for hydro production are largely employed when a generation scheduling problem is formulated as a linear or mixed integer optimization program. Even though such models may provide a satisfactory representation of hydro generation as compared to the real nonlinear function, breakpoints of the function become natural candidates to optimal solutions of the problem. Such...
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 concerns the challenge of teaching future energy systems using concepts familiar to engineering students. It is stressed that unless operating and design problems are formulated in a way understandable to those who do not specialize in electric power systems it becomes very difficult to identify what may be the roadblocks to innovation and better performance of the evolving energy systems...
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