A Scheduling Method for Power Grid Peak Shaving Capability Based on Large-Scale Wind Power Grid-connected

Abstract

The invention relates to the field of planning and dispatching of a power grid, and discloses a method for dispatching power grid pitch peak capability based on large-scale wind power sychronization. The method comprises the following steps: (1) setting the pitch peak capacity provided by hydropower for wind power as F, and the sum of wind power and hydropower as a definite value, F plus Q; leading Wa plus Wi to be more than or equal to (F plus Q) multiplied by 24, conducting pilot calculation on maximum output Fa of wind power allowed by the power grid; (2) substituting Fa into an analog computation model run by a given power grid system, carrying out calculation to obtain load rate of fire power with a light load and a difference F fire between fire power output and fire power minimum output under the load rate, which are taken as the pitch peak capacity provided by the fire power for wind power; and (3) when F fire is less than 0, decreasing wind power output Fa value capable of being balanced by hydropower, and repeating the step (2) until F fire is more than or equal to 0, thus obtaining the total pitch peak capacity provided by the given power grid system for wind power: total F equals to Fa plus F fire, wherein total F is wind power capacity capable of being integrated into the given power grid system.

Description

technical field [0001] The invention relates to the field of power grid planning and dispatching operation, in particular to a dispatching method for power grid peak regulation capability based on large-scale wind power grid connection. Background technique [0002] Northwest my country is rich in wind energy resources, and there are many excellent wind farms with flat terrain, convenient transportation, and no destructive wind speed, and the installed capacity of wind power is gradually increasing. In order to maintain the normal operation of the power system, when wind power is connected to the grid, other conventional power generation methods must provide compensation and adjustment for its active output, so as to ensure continuous, reliable and safe power supply to the power load. However, compared with conventional hydropower, thermal power and other power generation methods, the most fundamental difference of wind power generation is that its active output is intermitt...

AI Technical Summary

Problems solved by technology

Grid-connected wind power exceeds the "peak shaving" limit that the grid can provide for wind power, which means that it is difficult for the grid to balance the randomness of wind power output, resulting in active power fluctuations, resulting in frequent changes in grid frequency, and bringing catastrophic consequences to the safe and reliable power supply of the grid

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