A method for determining the peak-shaving demand of a large-scale wind power grid-connected system

Abstract

The invention provides a method for determining the peaking demand of a large-scale wind power integration system. The method comprises the following steps: generating a year-round wind power output time sequence; generating a year-round load time sequence; and building a conventional generator set status transfer sequence considering planned generator shutdown, determining the peaking demand of a large-scale wind power integration system, drawing a peaking demand curve, and doing statistics of peaking demand indexes. The method presented by the invention is simple, practical and highly operable. The problem that there is a need for generator set combination in the traditional method of status transfer sampling only considering forced generator shutdown is avoided. An accurate and effective analysis method and evaluation indexes are provided for solving the problem that the peaking capacity of a large-scale wind power integration system is inadequate. The peaking demand of a wind power integration system can be reflected directly. The operation stability and reliability of a large-scale wind power integration system are guaranteed.

Description

technical field [0001] The invention relates to the field of electric power system planning, in particular to a method for determining the peak-shaving demand of a large-scale wind power grid-connected system. Background technique [0002] Wind power output is volatile and uncertain, and is often inconsistent with the load curve. The ability of the system to accept wind power during the night low-load period is limited by the minimum technical output of conventional generating units. When the scale of wind power grid-connected is large, a large amount of wind will be curtailed due to insufficient peak-shaving capacity during the system's low load period. Especially in areas with a high proportion of coal-fired thermal power and heat generators, insufficient peak regulation has become the main factor restricting the capacity of wind power consumption. Due to the randomness of wind power output, it is difficult to accurately describe the extent to which wind power grid-connec...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a method for determining the peak-shaving demand of a large-scale wind power grid-connected system, which is simple, practical and highly operable; It is also necessary to solve the problem of unit combination; it can provide accurate and effective analysis methods and evaluation indicators for solving the problem of insufficient peak-shaving capacity of large-scale wind power grid-connected systems; it can intuitively respond to the peak-shaving requirements of wind power grid-connected systems; Operation stability and reliability of wind power grid-connected system

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