The present compensation method of peak load regulation is classified into two parts: the basic peak load regulation without any remuneration and the remunerative peak load regulation compensated through specific rules. After the principle of energy-saving power generation dispatch was implemented， the difference between the peak load capacity undertaken by the generating units with low energy consumption and that by the generating units with high energy consumption becomes large. In the present framework， generating units will get no compensation in the range of basic peak load regulation， which is unfair. A responsibility system of peak load regulation and margin capacity is introduced. A novel method is proposed to establish the peak load regulation mechanism with the concept of equivalent available load rate. Practical samples show that the proposed method is reasonable with good operability.