The　unified　power　quality　conditioner　(UPQC)　has　prospects　in　power　quality　management　considering　green　energy　integration.　This　paper　proposes　an　optimization　method　for　the　location　and　capacity　planning　of　UPQCs　in　the　distribution　grid　with　distributed　generators.　The　planning　and　dispatching　of　UPQCs　are　combined　into　a　coupled　optimization　model　in　this　paper.　The　dual-controlled-source　model　is　proposed　and　well　used　to　describe　the　operation　state　of　UPQC.　Fluctuations　in　the　output　of　wind　generators　and　photovoltaic　power　plants　are　also　taken　into　account.　The　improved　golden　eagle　optimization　(IMOGEO)　algorithm,　based　on　the　two-archive　strategy,　can　better　balance　the　convergence　and　diversity　of　the　non-dominated　solution　set.　A　case　study　is　carried　out　based　on　the　modified　IEEE　33-node　distribution　grid　model　including　DGs　and　loads　with　a　diurnal　variation.　The　optimized　schemes　of　location　and　capacity　are　obtained,　and　the　corresponding　dispatching　strategies　display　the　superiority　in　both　voltage　variation　and　line　loss.　The　results　verify　the　effectiveness　and　advantages　of　the　proposed　method.　(C)　2022　The　Author(s).　Published　by　Elsevier　Ltd.