Capacity credit, reliability indices, conventional and renewable generation mix

Published: 07-11-2018| Version 1 | DOI: 10.17632/fsbpx79x94.1
Jose Antonio Lorca Martinez


Based on real public data obtained from Red Eléctrica de España, SA, of the generation and demand on the island of Gran Canaria between 03 / 2012-03 / 2017, the reliability indices and the capacity credit are calculated (conventional power that can be to be substituted by renewable power maintaining the reliability indexes), to then study the ramps introduced by the increase of renewable power, storage and the mix of conventional generation-renewable-storage that could be left in the system


Steps to reproduce

1.- RELIABILITY INDICES Go to "Reliability indices" folder. There are 5 cases without storage and 4 cases with storage. Go to "DCharacteristic.m", "GEolCharacteristic.m" and "GPVCharacteristic.m" and, using the data from the Gran Canaria Island, calculate "Characteristic.mat" data. Use "Characteristic.mat" (this file contains characteristic data calculated) in: - Cases without storage: modify the scalability factor and quit some conventional power from the "Base_Case" until you get the same LOLE as in the "Base_Case" - Cases with storage: modify the scalability factor, quit some conventional power from the "Base_Case" and add hydraulic generation until you get the same LOLE as in the "Base_Case" You can obtain an estimate of the capacity credit by dividing the added renewable power by scalability between the conventional power removed. 2.- CONVENTIONAL AND RENEWABLE MIX Go to folder "Conventional and renewable mix" Once obtained the data of the renewable and conventional power to be installed, maintaining the reliability indices, we proceed to the study of the resulting generation mix. First, the ramps that introduce the variations of the increase in renewable power are analysed. Go to "RampRates10min" and enter the corresponding value of the scalability factor of each of the analysed cases, with and without storage. You can get a representation of the cumulative probability and see the ranges of variation. See detailed description in the file "RampRates10min.m Then go to the files “Case_0_WithStorage.m”, “Case_1_WithStorage.m”, “Case_2_WithStorage.m” and “Case_3_WithStorage.m”, in each file the generation mix is calculated according to the values obtained, taking into account several factors, such as the storage limits, technical minima of the conventional power generation, the performance of storage charging and discharging cycles, the net demand or the minimum conventional power that is necessary to leave to be able to cover the days in which the renewable energy is not enough. Read the detailed description in each file.