An Online Prediction Method of Grid Frequency Situation Considering Wind Power and Energy Storage

Abstract

The invention discloses a power grid frequency situation online prediction method considering wind electricity and energy storage. The method comprehensively considers the frequency response capacityfor draught fan inertia control and variable pitch control as well as the roles of flexible control of energy storage equipment in system frequency response, and a power grid frequency situation prediction polymerization model for combined frequency modulation of a thermal power generating unit, a wind turbine generator and the energy storage equipment is established by collecting system operatingstate data and the information of the thermal power generating unit, the wind turbine generator and the energy storage equipment online, so that power grid frequency situation can be predicted onlinepreferably; compared with an existing method, the method relates to the roles of the wind turbine generator and the energy storage equipment in the system frequency response process, the power grid frequency situation can be predicted online preferably, the variation trend of electric power system frequency is grasped, and the prediction capacity of electric power system for system frequency is improved. Through the design, the prediction precision of power grid frequency situation is improved, and the prediction capacity of electric power system frequency is improved.

Description

technical field [0001] The invention relates to the technical field of power system situation awareness and trend prediction, in particular to an online grid frequency situation prediction method considering wind power and energy storage, which is mainly suitable for improving the power grid frequency situation prediction accuracy and power system frequency prediction capability. Background technique [0002] The penetration rate of wind power in the power system continues to increase, which poses a challenge to the frequency security of the power grid: (1) The variable speed wind turbine adopts power electronic control and maximum power operation, so that it basically does not have the ability of inertial response and primary frequency regulation; (2) The large-scale grid connection of wind power generation replaces the traditional generating units that provide frequency modulation capability, reducing the system's inertia constant and frequency modulation reserve capacity. ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of low power grid frequency situation prediction accuracy and weak power system frequency prediction ability in the prior art, and provide a wind power and wind power system with high power grid frequency situation prediction accuracy and strong power system frequency prediction ability. On-line prediction method of power grid frequency situation based on energy storage

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