Optimal Approach for Reliability Assessment in Radial Distribution Networks

Abstract

This paper proposes a new methodology for the evaluation of reliability in radial distribution networks through the identification of new investments in this kind of networks, in order to reduce the repair time and the failure rate, which leads to a reduction of the forced outage rate and, consequently, to an increase of reliability. The novelty of this research work consists in proposing an ac optimization model based on mixed-integer nonlinear programming that is developed considering the Pareto front technique, in order to achieve a reduction of repair times and of failure rates of the distribution network components, while minimizing the costs of that reduction, the power losses cost, the cost of the optimal capacitor location and size, and the maximization of reliability, which is in the form of minimization of nonsupplied energy cost. In order to estimate the outage parameters, a fuzzy set approach is used. The optimization model considers the distribution network technical constraints. A case study using a 33-bus distribution network is presented to illustrate the application of the proposed methodology.

Framework for multipoint optimal reactive power compensation in radial distribution system with high distributed generation penetration

“…Other than voltage control, there are additional advantages of SCB placement in DS, like loss reduction, 4,5 mitigation of voltage unbalance, 6 voltage security, 7 power factor improvement, 3 and reliability improvement. 8 While placing SCBs in DS, it is not only necessary to identify suitable location but also to determine optimal size of capacitors to achieve maximum effect on voltage by connecting least possible capacity, which further reduces the system loss. 9 Various techniques for capacitor placement have been proposed in literature to obtain optimal solutions based on location and size of SCBs.…”

“…In practice, fixed and switched capacitor banks are individually or in combination used as SCBs. Other than voltage control, there are additional advantages of SCB placement in DS, like loss reduction, mitigation of voltage unbalance, voltage security, power factor improvement, and reliability improvement …”

Electric Power Distribution System Reliability Evaluation Considering the Impact of Weather on Component Failure and Pre-Arranged Maintenance

“…The simulation-based method is a method that sets a random process, repeatedly generates a time series, calculates parameter estimates and statistics, and then studies its distribution characteristics. The papers [3]- [5] use analytical methods to evaluate the optimal values of maintenance time and failure rate to improve the reliability of radial power distribution systems. In paper [6], based on the state-sampling…”

Effects of Producer and Transmission Reliability on the Sustainability Assessment of Power System Networks

“…A bootstrap technique is used to generate different scenarios and to quantify the transmission reliability margin with good accuracy. In [29], a methodology is proposed for the reliability evaluation of radial distribution networks. The methodology is based on an AC multiobjective optimization of repair times, failure rates, costs, and reliability.…”