Wind power plant frequency modulation control strategy based on equal adjustable capacity proportion

Abstract

According to a wind power plant frequency modulation control strategy based on the equal adjustable capacity proportion, a mode frequency modulation control strategy based on the equal adjustable capacity proportion of a wind power plant station is provided on the basis of research of a single-machine frequency modulation control strategy based on wind turbine generator set load shedding standby control; when the system frequency change exceeds a frequency modulation control dead zone, the wind power plant frequency modulation control system gives different power increasing instructions to each unit in the wind power plant according to the deviation between the actual frequency value and the target frequency value of the frequency grid-connected point and the wind power plant power adjustment amount in an active power distribution mode so as to support the power grid frequency recovery; and the problems of wind curtailment, electricity curtailment and the like caused by the fact that unit frequency modulation resources cannot be fully utilized when the load shedding reserved power of the wind power plant participates in system frequency modulation are effectively reduced.

Description

Technical field [0001] The present invention relates to the field of wind farms grid-network frequency modulation techniques, and more particularly to a wind farm frequency modulation control strategy based on adjustable capacity ratio. Background technique [0002] Wind power generation has become the main force of power growth, but new energy such as wind power is weakly or zero, generally not involved in grid faster, as its permeability is continuously improved, will gradually deteriorate the frequency characteristics of the power system, and operate the power grid safely Bring a threat. The high permeability of wind power in the prior art is increasingly obvious on the stable operation of the power system. At the same time, the wind turbine is better than conventional thermal power units in terms of control flexibility, response speed, and therefore, wind power participates in the power network to ensure power system Safety and stable operation has become an important topic o...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention conceives a wind farm frequency modulation control strategy based on equal adjustable capacity ratio, provides a scientific and reasonable, good applicability, not only can control the wind farm to participate in the power grid according to the requirements of grid-connected rules Frequency adjustment, and consider the heterogeneity of the operating conditions of each unit, make full use of the frequency adjustment strategy of each unit's frequency adjustment capacity, solve the difficulties in setting the frequency adjustment parameters of each unit in the wind farm, and the frequency adjustment resources of the units cannot be fully utilized, etc., and improve the system frequency stability sex

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