Wind power plant power control method and system

Abstract

The embodiment of the invention provides a wind power plant power control method and system, and relates to the technical field of wind power generation. The invention aims to improve the wind power plant power control efficiency. The method comprises the following steps: acquiring a mode signal, a control power instruction value, a control precision instruction and a power-to-zero limiting instruction; the mode is identified according to the mode signal, the control power instruction value and the sum of the theoretical power of all fans; according to the mode, limited power or limited power change rate control is carried out on all fans; according to the control precision instruction, the control precision of the all fans is controlled; and according to the power-to-zero limiting instruction, whether power-to-zero limiting is carried out on all fans is controlled. The wind power plant power control system comprises an EMS system and all fans. And each performance parameter can be selected according to different performance parameter requirements in local power grid standards, so that different power grid requirements are met, and the power control efficiency of the wind power plant is improved.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a method and system for controlling power of a wind farm. Background technique [0002] With the substantial increase in the proportion of my country's wind power installed capacity, in order to make the power grid more stable and smooth, the State Grid has put forward higher requirements for the peak-shaving capacity of wind power. On the basis of the two standards "GBT 19963-2011 Wind Farm Connected to Power System Technical Regulations" and "NBT 31078-2016 Wind Farm Grid-connected Performance Evaluation Method" promulgated by the State Grid, each province is based on its own provinces. The layout of power resources proposes standards that are more suitable for the province's power dispatching system, and the update iteration time is also very fast. Most of these standards are more stringent than the performance parameters in the national grid standards. ...

AI Technical Summary

Problems solved by technology

[0004] In response to the current requirements of numerous power grid standards, each fan manufacturer has customized a large number of full-field power control programs. Multiple versions will inevitably reduce the efficiency of development and maintenance, and increase the difficulty of program management, thereby increasing the probability of errors.

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