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This paper proposes a fuzzy control strategy to reduce the wind power fluctuations and improve the system reliability. The control strategy aims at controlling charging and discharging energy storage process based on wind power and load changes. What's more, the original strategy is optimized by intervening in battery charging and discharging to manage State of Charge (SOC) of battery. The strategy...
Self-healing is a critical and desirable feature for electric power systems. Following an outage, it is critical to restore system back to a normal operation condition as efficiently as possible. The advanced decision support tools are needed to assist system operators to restore a grid from major outages efficiently and safely and enhance the resilience of a smart grid. In this paper, optimization...
Hopping sequence used in VHF Hopping Radio ought to have a longer period, therefore the partial and dynamic properties of balance and Hamming correlation are more essential in practical hopping sequences application. Based on m sequence of GF(p) structure we had designed hopping sequence. The paper uses χ2 statistic test for partial of hopping sequence homogeneity, frequency interval stay, run-length,...
This work proposes a practical two-stage architecture for online voltage stability margin estimation using statistical models and classification techniques. The approach models the relationship between reactive power reserves and voltage stability margin using multi-linear regression models. In order to handle uncertainty related to variable loading conditions and network topology, a few regression...
This paper is a result of ongoing activity carried out by Understanding, Prediction, Mitigation and Restoration of Cascading Failures Task Force under IEEE Computer Analytical Methods Subcommittee (CAMS). The task force's previous papers are focused on general aspects of cascading outages such as understanding, prediction, prevention and restoration from cascading failures. This is the first of two...
Controlled power system separation, which separates the transmission system into islands in a controlled manner, is considered the final resort against a blackout under severe disturbances, e.g., cascading events. Three critical problems of controlled separation are where and when to separate and what to do after separation, which are rarely studied together. They are addressed in this paper by a...
This paper investigates the use of multi-linear regression models (MLRMs) and machine learning techniques for online voltage stability margin prediction. The methodology relies upon the relationship between system wide reactive power reserves and voltage stability margin. A comprehensive voltage stability assessment considering an extensive contingency list and several load increase directions is...
A comprehensive study has been performed to compute the voltage stability margin for Tri-State South Colorado area using EPRI power system voltage stability region (PSVSR) program. We determined the critical cut-sets to separate the weak region from the rest of the transmission network, calculated the voltage stability boundaries in cut-set state space, and investigated remedial action schemes.
This is a summary for presentation in the panel session, ldquoUnderstanding, Prediction, Mitigation and Restoration of Cascading Failuresrdquo at IEEE PES PSCE 2009. Recent major blackouts in North America, Europe, and other countries highlight the importance of reliability of our electric energy infrastructure and the economic impact of blackouts. These blackouts were caused by a cascading sequence...
This paper first presents a review of the current technology in power system protection and control, including the protective relays, local controls and system controls. Then, this paper presents a couple of typical scenarios to illustrate the possible problems with the existing technology. Next, this paper proposes the vision of a self-healing protection and control system based on real-time, look-ahead...
In our previous studies, it has been demonstrated that the boundary of transient stability can be approximated by hyper planes (HPs) in power injection space over quite large range. In this paper, an effective method to compute such HP of large scale power systems is proposed. Based on coherence identification of generators for a given fault, the proposed method first reduces the original system to...
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