The invention, which relates to the field of
power grid planning and scheduling operation, provides a daily on-off type
peak load operation method of a
gas engine set. The
power grid and the difference between the peak and valley increase rapidly, so that the peak regulation pressure of the
system increases continuously; and the peak regulation pressure of the
power grid increases further because of the influence of large-scale feeding of the extra-high-
voltage direct-current power. The scheduled electric quantity is used as the single-
machine control object; the start-up
time range is determined by considering the upper limit and the
lower limit of the output; and a feasible continuous start-up time set is searched and determined by using a load value as
heuristic information. With consideration of the adjustable output
lower limit, the high-peak output process of each start-up scheme is determined in an optimized manner by using an improved
load shedding strategy; and an optimal start-up operation scheme and a set generating plane are selected based on a criterion of residual load
mean square error minimization. According to the method provided by the invention, the peak regulation space of the
gas engine set at the
peak load time is released fully, so that the tracking and response capability of the grid
peak load is improved effectively; and the grid peak regulation demand and the
gas engine set operation restriction are considered simultaneously.