The document discusses concepts of capital structure and working capital policies for power companies in India. It provides information on major power generation companies in India including Tata Power, NTPC, Power Grid Corporation, Torrent Power, and Suzlon Energy. It discusses the different sources of capital including equity, debt, preference shares, and retained earnings that make up the capital structure of these companies. It also analyzes the working capital, working capital cycle, and working capital policies of these major power companies.