Midwest ISO

Carmel, IN, United States

Midwest ISO

Carmel, IN, United States
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Ding T.,Xi'an Jiaotong University | Bo R.,Midwest ISO | Bie Z.,Xi'an Jiaotong University | Wang X.,Xi'an Jiaotong University
IEEE Transactions on Power Systems | Year: 2017

Phase shifting transformers (PSTs) can be regulated to minimize total generation cost in optimal power flow problems. Under the perception that there exists multiple optimal solutions of PST angle adjustment and better economy may be achieved by controlling a small fraction of PSTs, this letter proposes a mixed integer linear programing model to optimally determine the subset of PSTs for angle adjustment. Numerical results on several test systems including large-scale systems show that the proposed model can provide better economic dispatch with regulating a small number of PSTs. © 1969-2012 IEEE.

Mishra Y.,Midwest ISO | Mishra S.,Indian Institute of Technology Delhi | Li F.,University of Tennessee at Knoxville
IEEE Systems Journal | Year: 2012

This paper proposes the use of battery energy storage (BES) system for the grid-connected doubly fed induction generator (DFIG). The BES would help in storing/releasing additional power in case of higher/lower wind speed to maintain constant grid power. The DC link capacitor is replaced with the BES system in a DFIG-based wind turbine to achieve the above-mentioned goal. The control scheme is modified and the co-ordinated tuning of the associated controllers to enhance the damping of the oscillatory modes is presented using bacterial foraging technique. The results from eigenvalue analysis and the time domain simulation studies are presented to elucidate the effectiveness of the BES systems in maintaining the grid stability under normal operation. © 2011 IEEE.

McCalley J.,Iowa State University | Jewell W.,Wichita State University | Mount T.,Cornell University | Osborn D.,Midwest ISO | Fleeman J.,American Electric Power
IEEE Power and Energy Magazine | Year: 2011

Planning of bulk energy systems has traditionally been one of the most important activities addressed by national, state, and local authorities. Such planning decisions result in the construction of generation and transmission facilities that heavily influence the economic competitiveness of the supplied region via the cost of energy, impact of interruptions, and effects on the environment. © 2011 IEEE.

Heydt G.T.,Arizona State University | Chowdhury B.H.,Missouri University of Science and Technology | Crow M.L.,Missouri University of Science and Technology | Haughton D.,Arizona State University | And 3 more authors.
IEEE Transactions on Smart Grid | Year: 2012

Smart grid technologies are gaining acceptance and are being integrated into power distribution systems as a result of public and private investment and funding. However, costs of these technologies appear to be a clear obstacle in the widespread integration and maximal use of these technologies. In this paper, the utilization of dollar pricing signals is proposed and illustrated for power distribution engineering. A signal modeled after locational marginal pricing from transmission engineering is proposed to provide pricing data locally in distribution systems. The calculation, utilization, advantages, and shortcomings of the concept are presented. A main conclusion is that the use of a distribution locational marginal price signal fits well with an electronically controlled power distribution system. © 2012 IEEE.

Mishra S.,Indian Institute of Technology Delhi | Mishra Y.,Midwest ISO | Vignesh S.,Indian Institute of Technology Delhi
IEEE Power and Energy Society General Meeting | Year: 2011

The available wind power is stochastic and requires appropriate tools in the OPF model for economic and reliable power system operation. This paper exhibit the OPF formulation with factors involved in the intermittency of wind power. Weibull distribution is adopted to find the stochastic wind speed and power distribution. The reserve requirement is evaluated based on the wind distribution and risk of under/over estimation of the wind power. In addition, the Wind Energy Conversion System (WECS) is represented by Doubly Fed Induction Generator (DFIG) based wind farms. The reactive power capability for DFIG based wind farm is also analyzed. The study is performed on IEEE-30 bus system with wind farm located at different buses and with different wind profiles. Also the reactive power capacity to be installed in the wind farm to maintain a satisfactory voltage profile under the various wind flow scenario is demonstrated. © 2011 IEEE.

Chen Y.,Midwest ISO | Keyser M.,Midwest ISO | Tackett M.H.,Midwest ISO | Ma X.,Electricity Market Consulting Inc.
IEEE Transactions on Power Systems | Year: 2011

The purpose of this paper is to analyze various approaches to incorporate short-term stored energy resources into the Midwest ISO co-optimized energy and ancillary service market. Based on the analysis, the best approach is to utilize short-term stored energy resources for regulating reserve with the real-time energy dispatch to be set in such a way that the maximum regulating reserve can be cleared. Results on a five-bus system are used to illustrate the clearing and pricing on short-term stored energy resources with the proposed approach. Monte Carlo simulation on the five-bus system is used to illustrate the AGC regulation deployment. © 2010 IEEE.

Miao Z.,University of South Florida | Fan L.,University of South Florida | Osborn D.,Midwest ISO | Yuvarajan S.,North Dakota State University
IEEE Transactions on Energy Conversion | Year: 2010

This paper develops a coordination control strategy for wind farms with line commutated converter-based HVdc delivery for participating in inertial response and primary frequency control. The coordination philosophy is to feedback the grid frequency and its derivative and adjust the delivery power of the HVdc link according to the feedback signals. The feedback loop employing the derivative of the grid frequency aims to improve the inertial response while the feedback loop employing the grid frequency deviation introduces a droop at the rectifier control loop. When the grid frequency is too high or too low, active power flow through the HVdc link will be ramped down or up. In turn, the wind generation will increase or decrease the blade angles to reduce or increase the captured wind power through pitch control. A case study demonstrates the effectiveness of the inertial enhancement and frequency droop in HVdc control. Simulation results in transient security assessment tool are given. © 2006 IEEE.

Osborn D.,Midwest ISO
IEEE Power and Energy Society General Meeting | Year: 2011

HVDC transmission has characteristics that may be able to enhance the reliability and economic performance of the interconnected AC system. One characteristic of HVDC is that the schedules may be programmed. A second significant characteristic is that the speed of response over a long distance (500+ miles) is in the range of a few cycles. Two applications that might use the HVDC characteristics are frequency control and integrating wind generation. Overly simple economic examples of the two applications are discussed © 2011 IEEE.

Navid N.,Midwest ISO
2012 IEEE PES Innovative Smart Grid Technologies, ISGT 2012 | Year: 2012

The current trends encourage the expansion of demand response in power system operation. Although operational strategies for various demand response classes (industrial, commercial and residential) are different, a set of common opportunities and challenges face the integration of demand response resources into energy market and operating reserve mechanisms. © 2012 IEEE.

The purpose of this paper is to analyze three formulations developed to facilitate participation of demand response resource Type-1 in the Midwest ISO's co-optimized energy and ancillary service market. While these three formulations appear similar on the surface, careful analysis will show that they can have different impacts on clearing and pricing outcomes. Based on this analysis, the formulation that can maintain reserve product priority and reserve clearing price order is selected and implemented in the Midwest ISO Security Constrained Economic Dispatch (SCED) and Security Constrained Unit Commitment (SCUC) market clearing processes. A 5-bus system is used to illustrate the features of each approach. This paper focuses on SCED formulations. The impact from the discussed formulations on SCUC should be similar. © 2011 Elsevier B.V. All rights reserved.

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