Accurate and real-time calculation of operating costs of power generation enterprises is basic task for power generation enterprises to conduct price negotiation and competitive bidding with power companies

grid companies and large users in the electricity market. On the basis of introducing different transaction types in electricity market

this article analyzes three kinds of operation costs and their calculation methods for power generation enterprises. Taking a 300 MW coal-fired unit as the example

the variable cost price

average cost price and marginal cost price for medium-and long-term contract/bidding markets

pre-day markets

real-time markets and ancillary services markets were calculated

and the key problems need to be considered in cost calculation were investigated

to provide reference basis for power generation enterprises to make power sale and bidding strategy.