Adequacy Evaluation of Distribution System Including Wind/Solar DG During Different Modes of Operation

Abstract

Keen interest in the development and utilization of renewable distributed generation (DG) has been currently observed worldwide. The reliability impact of this highly variable energy source is an important aspect that needs to be assessed as renewable power penetration becomes increasingly significant. Distribution system adequacy assessment including wind-based and solar DG units during different modes of operation is described in this paper. Monte Carlo simulation (MCS) and analytical technique are used in this work with a novel utilization of the clearness index probability density function (pdf) to model the solar irradiance using MCS. The results show that there is no significant difference between the outcomes of the two proposed techniques; however, MCS requires much longer computational time. The effect of islanding appears in the improvement of the loss of load expectation (LOLE) and loss of energy expectation (LOEE).

A New Ensemble Probabilistic Method for Short-Term Photovoltaic Power Forecasting

“…When the PV generation system is equipped with a maximum power point tracker (MPPT), the output active power of the PV system at hour, P PV t , is a linear function of the total irradiance I β t (in kW/m 2 ) at hour t on a surface with an inclination β to the horizontal plane [28,29]:…”

Reliability Evaluation of Distribution System Considering Sequential Characteristics of Distributed Generation

“…It is assumed that there are only circuit breakers and sectionalizers in the feeder which are completely reliable. The parameters of lines can be found in the references [13][14]. The availability rate of DG is 0.95 and conversion time is 0.1 h [9].…”

“…With the consideration of the stochastic characteristics of power output of photovoltaic generation and wind power generation, a reliability evaluation algorithm for distribution network containing micro-grid had been investigated in [5]. The formation probability of isolated island had been computed based on analytical method in [6][7]. This paper describes a method to identify the faults' effect on load points' reliability index based on equivalent simplification of distribution network.…”

Reliability Evaluation of a Distribution Network with Microgrid Based on a Combined Power Generation System

“…Most present studies mainly focus on microgrids with only DG. The probabilistic model is used to simulate the output power of photovoltaic and wind power [6,7], which cover the uncertainty and randomness of intermittent DG, but these two papers do not develop a battery model and ignore the possible influence of batteries. An integrated Markov model that incorporates the DG adequacy transition rate, DG mechanical failure, and starting and switching probability is utilized to give accurate results for the DG reliability assessment in [8], but the method is only applicable to a distribution network with intermittent DG.…”

“…This can provide a more accurate model to simulate the output of wind power generation and reduce the deviation of reliability evaluation. Like [6][7][8], the model only takes DG into consideration and it has no storage options.…”