SAO PAULO, June 29 (Reuters) – Brazilian power utility Cemig (CMIG4.SA) said on Wednesday it reached a deal to acquire a special purpose company holding three photovoltaic plants for around 100 million reais ($19.30 million). The payment will be made when the solar plants start operating, which is scheduled to happen between July and February 2023, the company said. The plants are located in Minas Gerais state and will supply around 2,500 commercial and industrial customers.