Transmission Tariff under Open Access: a Case Study of 400 kV Maharashtra State Electricity Transmission Company Limited (MSETCL)

摘要

The electric power industry has undergone restructuring in response to changes in law, technology, markets, and competitive pressures. Today transmission open access is the key to a free and fair electricity market. Under open access, transmission acts as a gatekeeper. It can be closed in defense of the regulated marketplace or opened to support a greater number of participants/competition. It is the transmission tariff, which shapes the level of competition in the electricity market. In India, with the enactment of Electricity Act 2003 lay down the guidelines towards "transmission open access" for inter and intra-state transmission. The objective is to recover and share transmission cost in the form of tariff at the same time to assure system security and reliability of the power system. In Maharashtra State, intra-state transmission tariff is notified for discussion by the Maharashtra Electricity Regulatory Commission (MERC). This paper reviews the philosophy of transmission tariff and worked out optimal embedded cost of tariff for MSETCL system. The study endorses the optimal MW-mile/MVA-mile methods for the system.