Looks a little bit like Wilsonara Inferno, but in Wils. Inferno I've seen the white on the lip is bigger and it had more yellow picotee markings on the petals.
Since there are multiple hybrids that look similar, you won't be able to get a positive ID. But fortunately all of the Oncidium-tribe hybrids have similar culture. With the genus reclassifications, it may now actually be considered "Oncidium" but likely also contains what used to be Odontoglossum and maybe some Miltonia... So just enjoy... it is lovely.