Topic
Blackout
About: Blackout is a research topic. Over the lifetime, 2088 publications have been published within this topic receiving 30433 citations.
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TL;DR: This work reviews blackouts from different countries by considering their causes and solutions, as well as the discussion thoughts from many researchers, which can provide significant references to improve the grid protection strategies.
65 citations
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01 Jan 2014
TL;DR: In this paper, the relationship between Power System Dynamic Equilibrium, Load-Flow, and Operating Point Stability is investigated and real-time implementation of Dimo's Stability Analysis Technique is presented.
Abstract: Relationships between Power System Dynamic Equilibrium, Load-Flow, and Operating Point Stability.- Fast Assessment of the Distance to Stability.- Accuracy Testing and Real-Time Implementation of Dimo's Stability Analysis Technique.- Emergency Monitoring and Corrective Control of Voltage Instability.- On-Line Voltage Security Assessment.- Critical Issues for Successful On-Line Security Assessment.- The Case for Using Wide-Area Control Techniques to Improve the Reliability of the Electric Power Grid.- Preventive and Emergency Control of Power Systems.- Sensitivity Analysis of Dynamic Stability Indicators in Power Systems.- Model Predictive Control of Electric Power Systems under Emergency Conditions.- The Role of Power System Visualization in Enhancing Power System Security.- Comprehensive approach to Real-Time Stability.- Transient Stability in Real-Time Implementations.
63 citations
TL;DR: This paper analyzes the interactions among protection system components and the power grid in extreme events pertaining to simultaneous faults and cascading failures and proposes a new risk assessment method applicable to extreme cases in power systems.
Abstract: This paper presents a new risk assessment method that is applicable to extreme cases in power systems. This paper analyzes the interactions among protection system components and the power grid in extreme events pertaining to simultaneous faults and cascading failures. The hidden failures of protection systems could exacerbate power system conditions if cascading events tend to follow a path to a blackout. The proposed risk assessment considers detailed reliability models of protection system components including circuit breakers (CBs) and protective relays. The failure probability of a CB is formulated considering its component degradation rate and operation times. The failure model of a protective relay is constructed using the dynamic fault tree. The evolution of cascading failures of power systems in extreme conditions, which deteriorates due to protection system malfunctions, is modeled based on the actual physical system behavior. The effectiveness of the proposed risk assessment method is demonstrated using a modified 9-bus system and the IEEE 68-bus system.
62 citations
TL;DR: Development and evaluation of a small scale grid interactive dc microgrid for residential houses, telecommunication systems, and data center has been proposed and a prototype is developed to validate the simulation results presented during grid connected and isolated mode.
Abstract: Thirst for energy is increasing significantly with increase in economy around the world which burdens conventional grid (CG) due to peak demand, energy deficit, and carbon emission, but major part of continents has plentiful wind and solar energy which can be harnessed locally to minimize it. Major objective of this research is to reduce the peak power deficit present in CG system and to provide a reliable power supply even in case of grid failure or during blackout. In this paper, development and evaluation of a small scale grid interactive dc microgrid for residential houses, telecommunication systems, and data center has been proposed. The objective is being achieved by designing a comprehensive power flow control strategy and explored for different practical scenarios through real time simulation in RSCAD/RTDS platform. A prototype is developed to validate the simulation results presented during grid connected and isolated mode.
62 citations
TL;DR: In this paper, a restorable load estimation method is proposed employing wide area monitoring system (WAMS) data after the network frame has been reenergized, and WAMS is also employed to monitor the system parameters in case the newly recovered system becomes unstable again.
Abstract: Restoring a large-scale power system has always been a complicated and important issue. A lot of research work has been done on different aspects of the whole power system restoration procedure. However, more time will be required to complete the power system restoration process in an actual situation if accurate and real-time system data cannot be obtained. With the development of the wide area monitoring system (WAMS), power system operators are capable of accessing to more accurate data in the restoration stage after a major outage. The ultimate goal of the system restoration is to restore as much load as possible while in the shortest period of time after a blackout, and the restorable load can be estimated by employing WAMS. Moreover, discrete restorable loads are employed considering the limited number of circuit-breaker operations and the practical topology of distribution systems. In this work, a restorable load estimation method is proposed employing WAMS data after the network frame has been reenergized, and WAMS is also employed to monitor the system parameters in case the newly recovered system becomes unstable again. The proposed method has been validated with the New England 39-Bus system and an actual power system in Guangzhou, China.
62 citations