一、我国电力结构发展变化趋势近２０年来我国电力结构发生了巨大变化，发电方式已从１９７８年前的较为单一的水电和火电结构，发展成为以火电为主、多种发电能源互补的新格局，但各种方式的发电装机和发电量占全国总水平的比重则变化不大。１９７８年，发电装机中水电占２７ I. Trends in the development and changes of China’s power structure In the past 20 years, China’s power structure has undergone tremendous changes. The power generation method has evolved from a relatively single hydropower and thermal power structure before 1978 to a new pattern of complementary power generation based on thermal power. However, the proportion of power generation capacity and power generation in various ways in the country’s total level has changed little. In 1978, hydropower accounted for 27