Reliability Evaluation Of Distribution Systems Research Articles

Reliability Evaluation of Distribution Systems Using Graphic-Based Interactive Computational Methods

This paper describes computational developments in the reliability evaluation of distribution systems. The techniques are based on interactive computing using a graphics terminal as the means of communicaticn between, the user and the computer. This type of computation enables the distribution planning engineer to construct, expand, reinforce and otherwise modify his networks using his natural mode of network drawing. The structure of the techniques permit sensitivity studies on alternative designs to be performed very easily. This is an important task in any properly structured reliability assessment. Typical displays seen on the graphics terminal are included.

Markov Cut-Set Approach for the Reliability Evaluation of Transmission and Distribution Systems

A Markov cut-set composite approach to the reliability evaluation of transmission and distribution systems involving dependent failures is described. The method consists in using the cut set equations for the reliability indices and then using Markov processes for the evaluation of terms in these equations. In this method, the transition rate matrix of only the members of a cut set is generated and, therefore, only a limited number of equations need be solved at a time. Both the steady state and time-specific reliability indices can be calculated using this method.

Markov Cut-Set Approach for the Reliability Evaluation of Transmission and Distribution Systems

Markov Cut-Set Approach for the Reliability Evaluation of Transmission and Distribution Systems

Reliability modelling and evaluation of transmission and distribution systems

This paper considerably extends the modelling and evaluation techniques presently used in assessing the reliability of transmission and distribution networks. The concepts described lead to a realistic analysis of such systems. The most important features that are described concern the incorporation of all realistic failure and restoration modes, development of the concept for overall system indices, inclusion of variable repair times and the ability to extend the usual loss of continuity criterion to include loss of quality, this often being of vital importance. All the techniques and concepts discussed were used to analyse a typical system, the results of which are included in the paper.

Reliability assessment of transmission and distribution schemes

This paper presents a further step in the development of accurate and consistent techniques for the reliability evaluation of transmission and distribution systems. A theoretically accurate Markov approach6is limited in application because of computer storage requirements and the rounding errors which occur in the solution of relatively large systems. This paper extends the modified approximate technique presented in reference (P) to permit evaluation of the contribution to the system reliability indices of different modes of component outage. The equations developed give results which compare very closely those predicted by the Markov approach. A three state weather model is developed to illustrate the effect of severe adverse weather periods on the system reliability performance. The load point failure modes considered are those which arise due to component permanent, temporary, maintenance and overload outages.

Quantitative Reliability Analysis of HVDC Transmission Systems Part I. Spare Valve Assesment in Mercury Arc Bridge Configurations

The high voltage direct current link is normally an integral part of the overall composite system. The design of any subsystem should be such that it does not materially effect the reliability of the overall system. The application of probability techniques can play an important role in the determination of subsystem and overall system adequacy. Numerous papers have been published on the application of probability methods to the evaluation of generating, transmission and distribution system reliability evaluation. The probability method used in the analysis of the dc subsystem should be compatible with that available for the ac system thus leading to overall composite system reliability evaluation.