Ibhokisi yokuguqula (idla ngokubizwa ngokuba yi"ibhokisi yokuguqula") yiseti egqibeleleyo yezixhobo zokuhambisa umbane esenziwe zizixhobo zamandla ombane aphezulu, isiguquli samandla, isixhobo sombane esine-voltage ephantsi kunye nezixhobo ezincedisayo. UCanwin, umenzi webhokisi yenguqu yobuchwephesha& umthengisi, ogxile kwi-substation yohlobo lwe-transformer kunye nemveliibhokisi yodidi lwesiguquli uyilo kwibhokisi yebhokisi, I-box type transformer sisixhobo sombane esiguqula amandla kwi-alternating current ngenjongo yokudlulisa amandla ukusuka kwelinye iphuzu ukuya kwelinye.Ngomthamo omncinci, ubunzima obulula, ingxolo ephantsi, ilahleko ephantsi, ukuthembeka okuphezulu. Ibhokisi yokuguqula isetyenziswa kakhulu kwiindawo zokuhlala, amaziko orhwebo, izikhululo zokukhanya, izikhululo zeenqwelo moya, iifektri kunye nemigodi, amashishini, izibhedlele, izikolo kunye nezinye iindawo.