EntityQ1747997· pop 5· linked from 277 articlesancillary servicesSign in to saveservices necessary to support the transmission of electric power to maintain reliable operations of the interconnected transmission systemConnectionstransformerEntitypower stationEntityelectrical gridEntityoperating reserveEntityload following power plantEntitypetroleumEntitycoalEntitynuclear powerEntityrenewable energyEntitynatural gasEntitydigital object identifierEntitywind powerEntityInternational Standard Serial NumberEntitybiofuelEntityhydroelectricityEntitybiogasEntityelectric powerEntitybiomassEntityQ180686Entitymoment of inertiaEntityCategoriesElectric power transmission