TOKYO, Jan 29 : Tokyo Electric Power said on Thursday its unit TEPCO Power Grid will sell up to about 26 million shares in its affiliate Kandenko as part of restructuring efforts to improve its financial health and pursue growth. The share sale, valued at about 150 billion yen ($979 million) based on Kandenko's Thursday closing price, is part of Tepco's plan unveiled on Monday to raise about 200 billion yen through asset sales over the next three years. Proceeds will be used for capital