Showing papers on "Blackout published in 1992"
01 May 1992
TL;DR: In this paper, a voltage collapse proximity indicator based on the optimal impedance solution of a two-bus system can be extended to an actual network and a linear reactive power dispatch algorithm which incorporates this indicator to minimize the possibility of voltage collapse in the system.
Abstract: The cause of the 1977 New York blackout has been proved to be the reactive-power problem. The 1987 Tokyo blackout was believed to be due to a reactive-power shortage and a voltage collapse at the summer peak load. These events have confirmed the importance of reactive-power planning and dispatching in maintaining the security of modern power systems. Appropriate control of system voltage profiles can enhance system security and may also reduce system losses. Previous investigations by the same authors have shown that a voltage collapse proximity indicator based on the optimal impedance solution of a two-bus system can be extended to an actual network. The authors describe a linear reactive power dispatch algorithm which incorporates this indicator to minimise the possibility of voltage collapse in the system.
60 citations
TL;DR: In this article, the individual restoration steps are described which prove to be necessary for an isolated part power system (without external voltage support), and with possible connection to a neighbouring power system in operation.
4 citations
01 Mar 1992
TL;DR: The article describes the actions that were taken following the incident and presents the audit that has been developed, which may be used by other facilities to assess preparedness and develop improvement plans.
Abstract: Mount Sinai Hospital in Toronto, Ontario, found itself stranded without electrical power for one hour when a transformer blew up in an Ontario Hydro station and hospital emergency generators failed due to inadequate ventilation This article discusses the impact of the power loss in a facility that relies on sophisticated technology and equipment Because the article describes the actions that were taken following the incident and presents the audit that has been developed, it may be used by other facilities to assess preparedness and develop improvement plans
3 citations
01 Oct 1992
TL;DR: In this paper, a Level III Probabilistic Risk Assessment (PRA) has been performed for LaSalle Unit 2 under the risk methods integration and evaluation program (RMIEP) and the Phenomenology and Risk Uncertainty Evaluation Program (PRUEP).
Abstract: A Level III Probabilistic Risk Assessment (PRA) has been performed for LaSalle Unit 2 under the Risk Methods Integration and Evaluation Program (RMIEP) and the Phenomenology and Risk Uncertainty Evaluation Program (PRUEP). This report documents the phenomenological calculations and sources of. uncertainty in the calculations performed with HELCOR in support of the Level II portion of the PRA. These calculations are an integral part of the Level II analysis since they provide quantitative input to the Accident Progression Event Tree (APET) and Source Term Model (LASSOR). However, the uncertainty associated with the code results must be considered in the use of the results. The MELCOR calculations performed include four integrated calculations: (1) a high-pressure short-term station blackout, (2) a low-pressure short-term station blackout, (3) an intermediate-term station blackout, and (4) a long-term station blackout. Several sensitivity studies investigating the effect of variations in containment failure size and location, as well as hydrogen ignition concentration are also documented.
1 citations