Source-load coordinated auxiliary frequency regulation method suitable for high-proportion new energy microgrids

Abstract

The present invention relates to a source-load coordinated auxiliary frequency regulation method suitable for a high-proportion new energy microgrid, comprising the following steps: 1) For a high-proportion new energy microgrid including double-fed asynchronous fans, diesel engines and controllable loads, determine the participating The frequency control method of each micro-source in micro-grid frequency modulation; 2) Establish a high-proportion new energy micro-grid mid-source-load cooperative participation in the micro-grid frequency modulation control simulation model, and set the strategy for participating in frequency modulation; 3) Calculate the multi-time according to the simulation model The economic benefits of source-load participation in frequency regulation under the scale, including diesel engine frequency regulation benefits B G , Fan virtual inertia frequency modulation benefit B wind And controllable load frequency regulation benefit B load , and in making FM economics S max Allocate FM capacity under optimal conditions. Compared with the prior art, the present invention has the advantages of being able to fully mobilize the enthusiasm of sources and loads in the microgrid to participate in auxiliary frequency regulation, and effectively reduce the frequency regulation pressure of the high-proportion new energy microgrid.

Description

technical field [0001] The invention relates to the technical field of power system frequency control, in particular to a source-load coordinated auxiliary frequency regulation method suitable for high-proportion new energy micro-grid calculations and optimal economic benefits. Background technique [0002] With the continuous increase in the proportion of new energy access, large-scale new energy without frequency modulation capability is gradually integrated into the grid, and wind power gradually replaces traditional generator sets. This will reduce the system inertia and increase the burden of system frequency regulation, thereby affecting the frequency of the system. Stability, which brings troubles to the stable operation of the power system, it is difficult to maintain the stable operation of the frequency of the new energy power system by relying solely on the automatic adjustment system of conventional units. Doubly-fed induction generator (DFIG) is the mainstream t...

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Problems solved by technology

[0005] Among the existing auxiliary frequency regulation methods, some methods only consider the coordinated frequency regulation of traditional units and the demand side, but do not consider the frequency regulation capability of wind turbines, and are not suitable for microgrids with a high proportion of new energy; some methods only consider system The frequency modulation effect of the system lacks comprehensive consideration of the frequency modulation benefits of the power supply side and the demand side, and does not take into account the optimal economic benefits of system frequency modulation

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